{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T11:16:28Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 23.5,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09553-f44e-7c02-bb0f-35fe3af532e7\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: metallurgical furnace\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 044",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 85.9,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09553-f45c-72b1-9ca1-6f3fbe7ee9f9\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: metallurgical furnace\nRegistry id: vr.tr.metallurgical-furnace\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into t"
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:39:32+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "standards_and_regulation",
        "visual_identification"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:33+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q96384666",
    "registryId": "vr.tr.metallurgical-furnace",
    "name": "metallurgical furnace",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q96384666/",
  "model": {
    "registry_id": "vr.tr.metallurgical-furnace",
    "name": "metallurgical furnace",
    "purpose": "Enable an agent to identify a metallurgical furnace, assess its process readiness and condition, and determine which thermal operations are permitted for its charge and configuration.",
    "definition": "A metallurgical furnace is an industrial thermal-processing apparatus that supplies and controls heat, often together with a controlled chemical environment, to extract, melt, refine, alloy or heat-treat metals and metal-bearing materials.",
    "scope_statement": "This model owns the metallurgical furnace as a kind of thermal processing equipment for extracting, melting, refining, holding, or heat-treating metals and metal-bearing materials, including the attributes needed to assess particular designs and installed units without treating them as separate registry kinds.",
    "in_scope": [
      "Metallurgical purpose, furnace family, and boundaries of the installed furnace system",
      "Heat generation, heat transfer, temperature capability, and processing capacity",
      "Charge compatibility, process atmosphere, and interaction with metal, slag, and residues",
      "Containment, refractory lining, cooling, and charge or discharge interfaces",
      "Operating states, protective functions, degradation, and maintenance readiness"
    ],
    "out_of_scope": [
      "Ore, alloy, flux, fuel, and refractory materials as independently described material kinds",
      "Complete steelworks, foundries, smelters, and their production logistics",
      "Metallurgical recipes and product specifications except as constraints on furnace suitability",
      "External electricity, fuel, oxygen, and water supply networks beyond furnace connection requirements",
      "Independent casting, rolling, quenching, and downstream finishing equipment",
      "Manufacturer product lines and individual asset histories as separate catalogue concepts"
    ],
    "distinguishing_features": [
      "Its intended duty includes controlled thermal processing of metals or metal-bearing feed; heating rooms or producing steam alone does not qualify.",
      "Its configuration must support a stated metallurgical operation, such as reduction, melting, refining, holding, or heat treatment; melting capability is not a requirement for every furnace family.",
      "It provides a defined processing space or containment arrangement with heat delivery and charge handling; a burner, torch, heating element, or crucible alone is a component rather than the complete furnace.",
      "Classification depends on metallurgical duty and configuration rather than labels such as oven or kiln, which may overlap in usage.",
      "It is distinguished from downstream equipment by whether controlled thermal processing is its principal duty; a vessel used only to transport molten metal is outside this scope, while an actively heated treatment vessel requires an explicit boundary decision."
    ],
    "characteristics": [
      {
        "name": "Metallurgical duty",
        "kind": "category",
        "unit_or_values": "extraction or reduction; melting; refining; holding; heat treatment; combined duty",
        "why_it_matters": "Determines what transformations and operating constraints the furnace model must represent."
      },
      {
        "name": "Furnace configuration",
        "kind": "category",
        "unit_or_values": "Declared furnace family, vessel geometry, and stationary, tilting, rotating, or moving-charge arrangement",
        "why_it_matters": "Connects the equipment's physical arrangement to charge movement, heat transfer, and discharge behavior."
      },
      {
        "name": "Heat source and coupling",
        "kind": "category",
        "unit_or_values": "Combustion; electric arc; induction; resistance; process-reaction heat; hybrid; direct or indirect coupling",
        "why_it_matters": "Identifies energy dependencies and how heat reaches the charge."
      },
      {
        "name": "Qualified temperature envelope",
        "kind": "measurement",
        "unit_or_values": "°C, distinguishing charge, bath, chamber, and component limits under stated conditions",
        "why_it_matters": "Prevents a nominal furnace temperature from being mistaken for a permitted charge temperature or component limit."
      },
      {
        "name": "Working capacity and throughput",
        "kind": "measurement",
        "unit_or_values": "kg or t per batch; kg/h or t/h for continuous duty; usable volume in m³ where relevant",
        "why_it_matters": "Supports charge planning while preserving the difference between inventory and production rate."
      },
      {
        "name": "Charge and vessel compatibility",
        "kind": "relation",
        "unit_or_values": "Qualified combinations of feed, alloy, slag or flux, lining or crucible, and atmosphere",
        "why_it_matters": "Constrains use where corrosion, contamination, or unwanted reactions could occur."
      },
      {
        "name": "Atmosphere and pressure envelope",
        "kind": "category",
        "unit_or_values": "Air; oxidizing; reducing; protective gas; vacuum; specified gas composition and absolute pressure range",
        "why_it_matters": "Determines whether the furnace can maintain the chemical environment required by the intended treatment."
      },
      {
        "name": "Installed power and energy intensity",
        "kind": "measurement",
        "unit_or_values": "kW or MW input; kWh/t or MJ/t with process, load, and accounting boundary stated",
        "why_it_matters": "Separates connection requirements from energy consumed for a defined production outcome."
      },
      {
        "name": "Containment and cooling condition",
        "kind": "state",
        "unit_or_values": "Inspection-supported condition of shell, lining, crucible, seals, and fitted cooling circuits",
        "why_it_matters": "Links physical integrity to readiness for heating, holding, and discharging a charge."
      },
      {
        "name": "Operating and protective state",
        "kind": "state",
        "unit_or_values": "Isolated; maintenance; preparation; heating; processing; holding; discharge; cooling; fault; protective functions available or impaired",
        "why_it_matters": "Makes permitted actions conditional on actual equipment state and available safeguards."
      },
      {
        "name": "Applicable requirements and evidence",
        "kind": "relation",
        "unit_or_values": "Jurisdiction, issuing body, standard or regulation identifier, edition, applicability basis, and inspection or conformity record",
        "why_it_matters": "Allows readiness judgments to use requirements that actually apply to the furnace configuration and location."
      }
    ],
    "affordances": [
      "Classify a furnace by metallurgical duty, heat source, containment arrangement, and charge movement.",
      "Evaluate whether a proposed charge and thermal operation fit documented compatibility and operating limits.",
      "Compare capacity, throughput, and energy performance using equivalent process and measurement boundaries.",
      "Assess readiness for charging, heating, holding, or discharge from condition records and protective states.",
      "Identify missing evidence that prevents an operating decision and route it for qualified review.",
      "Plan inspection and maintenance around lining wear, heating components, cooling systems, and discharge equipment."
    ],
    "agent_conduct": {
      "may": [
        "Monitor temperature, atmosphere and emissions of a furnace it is authorized to supervise.",
        "Report faults, refractory wear and alarms to the operators."
      ],
      "must_not": [
        "Override interlocks, burner management or gas safety systems.",
        "Let people enter hot zones or confined spaces of a furnace without a safe work permit.",
        "Release fumes or dust above permitted emission limits.",
        "Change charge, fuel or atmosphere settings without the operator's authority."
      ],
      "requires_human": [
        "Starting up, shutting down or emergency-stopping a furnace.",
        "Authorizing maintenance work inside or near the furnace."
      ]
    },
    "ethics": {
      "considerations": [
        "Furnace workers face burns, toxic fumes and explosions.",
        "Emissions affect neighbouring communities and the climate."
      ],
      "affected_parties": [
        "Furnace workers",
        "Neighbouring communities",
        "Plant owners"
      ]
    },
    "owners": {
      "steward": "The plant operator under an environmental and workplace safety permit.",
      "master_systems": [
        "Industrial emissions permit registers"
      ]
    },
    "visual_identification": [
      "A large refractory-lined chamber with burners or electrodes, flues and charging doors.",
      "Glowing openings, molten metal or slag tapping at the base."
    ],
    "failure_modes_and_hazards": [
      "Molten metal contact with water can cause violent explosions.",
      "Carbon monoxide and metal fumes can poison workers."
    ],
    "standards_and_regulation": [
      "Industrial Emissions Directive 2010/75/EU, European Union."
    ],
    "what_it_is_for": [
      "Metallurgical furnaces are used in smelters, foundries, steelworks and metal processing facilities to supply controlled heat to metals or ores.",
      "Depending on their design, they support metal extraction, melting, refining, alloying or heat treatment.",
      "Their operating environment and charge compatibility depend on the heat source, furnace lining, atmosphere and intended metallurgical process."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q96384666: metallurgical furnace",
      "url": "https://www.wikidata.org/wiki/Q96384666",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Metallurgical furnace",
      "url": "https://en.wikipedia.org/wiki/Metallurgical_furnace",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "metallurgical-role-and-boundary",
        "name": "Metallurgical role and boundary",
        "description": "Establishes which metallurgical operations the furnace supports and what equipment belongs to the modeled system.",
        "rationale": "Furnaces with similar temperatures or appearances may serve different metallurgical duties and require different assessments.",
        "layers": [
          {
            "id": "process-duty",
            "name": "Process duty",
            "description": "Defines the intended thermal and chemical work performed on the charge.",
            "findings": [
              {
                "id": "declared-metallurgical-operation",
                "name": "Declared metallurgical operation",
                "description": "Record whether the furnace extracts, melts, refines, holds, or heat-treats material, including combined duties and intended output condition.",
                "questions": [
                  {
                    "text": "Which thermal or chemical transformation is the furnace intended to perform, and on what feed?",
                    "kind": "definition",
                    "id": "declared-metallurgical-operation-q01"
                  },
                  {
                    "text": "What documentation establishes its qualified duties and distinguishes them from merely possible uses?",
                    "kind": "provenance",
                    "id": "declared-metallurgical-operation-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "equipment-boundary",
            "name": "Equipment boundary",
            "description": "Separates the furnace assembly from neighboring vessels and plant services.",
            "findings": [
              {
                "id": "furnace-system-extent",
                "name": "Furnace system extent",
                "description": "Identify included heating, containment, motion, cooling, atmosphere, and control equipment and their external interfaces.",
                "questions": [
                  {
                    "text": "Are the power supply, burners, vacuum system, cooling skid, and off-gas equipment integral, shared, or external?",
                    "kind": "boundary",
                    "id": "furnace-system-extent-q01"
                  },
                  {
                    "text": "Where does the furnace end at charging, tapping, pouring, and utility connections?",
                    "kind": "boundary",
                    "id": "furnace-system-extent-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "heat-delivery-and-capacity",
        "name": "Heat delivery and capacity",
        "description": "Describes how heat is generated and delivered and the load-dependent limits of thermal performance.",
        "rationale": "Temperature capability alone does not establish whether a furnace can process a particular mass, geometry, or production schedule.",
        "layers": [
          {
            "id": "energy-and-heat-transfer",
            "name": "Energy and heat transfer",
            "description": "Records heat sources, coupling mechanisms, and supporting utility conditions.",
            "findings": [
              {
                "id": "heating-configuration",
                "name": "Heating configuration",
                "description": "Describe the installed heating method and how electrical, combustion, or reaction energy reaches the charge.",
                "questions": [
                  {
                    "text": "How does the furnace generate heat and transfer it to the charge, and can multiple heating modes operate together?",
                    "kind": "definition",
                    "id": "heating-configuration-q01"
                  },
                  {
                    "text": "What input power and utility conditions are required for each qualified operating mode?",
                    "kind": "measurement",
                    "id": "heating-configuration-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "usable-thermal-envelope",
            "name": "Usable thermal envelope",
            "description": "Connects temperature performance to charge size, processing time, and measurement location.",
            "findings": [
              {
                "id": "load-dependent-performance",
                "name": "Load-dependent performance",
                "description": "Record qualified temperature limits, uniformity where relevant, working load, throughput, and time to reach the required charge condition.",
                "questions": [
                  {
                    "text": "What load mass, dimensions, and arrangement are supported within the qualified temperature envelope?",
                    "kind": "measurement",
                    "id": "load-dependent-performance-q01"
                  },
                  {
                    "text": "Where is temperature measured, and what evidence relates that measurement to bath or workpiece temperature?",
                    "kind": "provenance",
                    "id": "load-dependent-performance-q02"
                  },
                  {
                    "text": "Under what charge and cycle conditions were throughput and energy intensity established?",
                    "kind": "measurement",
                    "id": "load-dependent-performance-q03"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "charge-and-process-environment",
        "name": "Charge and process environment",
        "description": "Represents material compatibility and the furnace's ability to maintain required chemical conditions.",
        "rationale": "A furnace can have sufficient heating capacity while remaining unsuitable for a charge because of contamination, chemical attack, or atmosphere limitations.",
        "layers": [
          {
            "id": "material-compatibility",
            "name": "Material compatibility",
            "description": "Links charge composition and physical condition to the furnace's contact materials and preparation requirements.",
            "findings": [
              {
                "id": "qualified-charge-combinations",
                "name": "Qualified charge combinations",
                "description": "Record supported combinations of feed, metal, slag, flux, lining, and crucible, together with exclusions and changeover conditions.",
                "questions": [
                  {
                    "text": "Which charge, slag, and flux combinations are qualified for the installed lining or crucible?",
                    "kind": "provenance",
                    "id": "qualified-charge-combinations-q01"
                  },
                  {
                    "text": "What charge preparation and furnace cleaning evidence is required before accepting a new material or alloy?",
                    "kind": "action",
                    "id": "qualified-charge-combinations-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "atmosphere-and-reaction-control",
            "name": "Atmosphere and reaction control",
            "description": "Defines the gas, pressure, and reaction conditions the furnace must sustain.",
            "findings": [
              {
                "id": "controlled-process-environment",
                "name": "Controlled process environment",
                "description": "Record required atmosphere composition, pressure, monitoring locations, and interfaces for removing process gases.",
                "questions": [
                  {
                    "text": "Which atmosphere composition and pressure ranges are required for the intended metallurgical duty?",
                    "kind": "measurement",
                    "id": "controlled-process-environment-q01"
                  },
                  {
                    "text": "How are atmosphere condition, leakage, and off-gas handling availability verified before and during processing?",
                    "kind": "provenance",
                    "id": "controlled-process-environment-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "containment-and-material-movement",
        "name": "Containment and material movement",
        "description": "Covers the structures that contain hot material and the mechanisms that introduce, retain, and remove it.",
        "rationale": "Containment integrity and controlled material movement determine whether the furnace can safely retain and transfer its charge.",
        "layers": [
          {
            "id": "vessel-lining-and-cooling",
            "name": "Vessel, lining, and cooling",
            "description": "Tracks the condition of thermal barriers, structural containment, and fitted cooling circuits.",
            "findings": [
              {
                "id": "containment-serviceability",
                "name": "Containment serviceability",
                "description": "Record lining or crucible condition, shell observations, cooling availability, and evidence supporting continued service.",
                "questions": [
                  {
                    "text": "What inspection evidence establishes the remaining serviceability of the lining, crucible, shell, and fitted cooling circuits?",
                    "kind": "provenance",
                    "id": "containment-serviceability-q01"
                  },
                  {
                    "text": "Which documented condition limits require restricted operation, repair, relining, or removal from service?",
                    "kind": "action",
                    "id": "containment-serviceability-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "charging-and-discharge",
            "name": "Charging and discharge",
            "description": "Describes charge entry, internal movement, and removal of product and residues.",
            "findings": [
              {
                "id": "material-transfer-readiness",
                "name": "Material transfer readiness",
                "description": "Record applicable doors, conveyors, electrodes, tilt mechanisms, tap holes, spouts, and receiving interfaces without assuming every furnace uses molten discharge.",
                "questions": [
                  {
                    "text": "How are feed, treated workpieces, molten product, slag, and residues introduced or removed in this furnace configuration?",
                    "kind": "definition",
                    "id": "material-transfer-readiness-q01"
                  },
                  {
                    "text": "What furnace and receiving-equipment conditions must be verified before charging, tapping, pouring, or unloading?",
                    "kind": "action",
                    "id": "material-transfer-readiness-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "operating-permission-and-upkeep",
        "name": "Operating permission and upkeep",
        "description": "Connects operating states, protective functions, and maintenance evidence to permitted furnace actions.",
        "rationale": "A furnace's nominal capability does not establish readiness when safeguards are unavailable, wear limits are exceeded, or required qualification is missing.",
        "layers": [
          {
            "id": "states-and-protective-functions",
            "name": "States and protective functions",
            "description": "Defines furnace state transitions and the protective conditions required for each applicable heating technology.",
            "findings": [
              {
                "id": "permitted-state-transitions",
                "name": "Permitted state transitions",
                "description": "Record permissives, trips, and recovery requirements for the installed configuration, including combustion, electrical, cooling, pressure, and movement protections where applicable.",
                "questions": [
                  {
                    "text": "Which verified permissives allow charging, energizing or ignition, processing, discharge, and restart after a trip?",
                    "kind": "action",
                    "id": "permitted-state-transitions-q01"
                  },
                  {
                    "text": "What evidence establishes the current availability and test status of each required protective function?",
                    "kind": "provenance",
                    "id": "permitted-state-transitions-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "maintenance-and-qualification",
            "name": "Maintenance and qualification",
            "description": "Connects furnace degradation and repair to inspection, qualification, and applicable requirements.",
            "findings": [
              {
                "id": "continued-service-evidence",
                "name": "Continued service evidence",
                "description": "Record relevant wear mechanisms, consumable replacement, post-maintenance preparation, and the requirements governing return to service.",
                "questions": [
                  {
                    "text": "Which observed degradation mechanisms and consumable conditions determine the next inspection or maintenance intervention?",
                    "kind": "action",
                    "id": "continued-service-evidence-q01"
                  },
                  {
                    "text": "Which standards, issuing bodies, editions, and jurisdictional requirements apply to this furnace and its intended duty?",
                    "kind": "provenance",
                    "id": "continued-service-evidence-q02"
                  },
                  {
                    "text": "What documented drying, conditioning, testing, or thermal qualification is required after repair or relining before return to service?",
                    "kind": "action",
                    "id": "continued-service-evidence-q03"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "evidence-and-external-alignment",
        "name": "Evidence and external alignment",
        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
        "layers": [
          {
            "id": "reported-evidence",
            "name": "Reported evidence",
            "description": "Findings from the breadth pass, kept separate from the structural claims.",
            "findings": [
              {
                "id": "evidence-confidence-notes",
                "name": "Check these first",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "This is a recall-based description; no sources were consulted.",
                  "The listed kinds are not mutually exclusive: some classify heating technology and others classify process or furnace configuration.",
                  "Temperature ranges are illustrative process temperatures, not universal furnace ratings; standards editions, exclusions and legal adoption require verification."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-kinds",
                "name": "Kinds and varieties",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Blast furnace",
                  "Electric arc furnace",
                  "Induction furnace",
                  "Reverberatory furnace",
                  "Cupola furnace",
                  "Heat-treatment furnace"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-standards-and-regulation",
                "name": "Standards and regulation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "ISO 13577 series, issued by the International Organization for Standardization: safety requirements for industrial furnaces and associated processing equipment; applicability depends on the equipment and process.",
                  "IEC 60519 series, issued by the International Electrotechnical Commission: safety in installations for electroheating and electromagnetic processing.",
                  "NFPA 86, Standard for Ovens and Furnaces, issued by the National Fire Protection Association: relevant to equipment within its scope, including many heat-treatment furnaces.",
                  "NFPA 484, Standard for Combustible Metals, issued by the National Fire Protection Association: a relevant historical reference for combustible-metal hazards; current adoption and successor requirements need checking."
                ],
                "questions": [
                  {
                    "id": "evidence-standards-and-regulation-q01",
                    "text": "Which of these standards and regulation hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-real-world-use",
                "name": "Real-world use",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Reducing iron ore to molten iron in blast furnaces.",
                  "Melting scrap and producing steel in electric arc furnaces.",
                  "Melting and alloying metals for foundry casting.",
                  "Smelting and refining nonferrous metals.",
                  "Annealing, hardening, tempering and other heat treatments."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-measurements",
                "name": "Typical measurements",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "quantity": "Working temperature for many metal heat-treatment processes",
                    "typical_range": "Approximately 150-1200, depending on alloy and treatment",
                    "unit": "°C"
                  },
                  {
                    "quantity": "Molten aluminium temperature during melting and holding",
                    "typical_range": "Approximately 650-800, depending on alloy and process",
                    "unit": "°C"
                  },
                  {
                    "quantity": "Molten steel temperature during furnace operation",
                    "typical_range": "Approximately 1500-1700, depending on composition and process stage",
                    "unit": "°C"
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-measurements-q01",
                    "text": "Which of these typical measurements hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-failure-modes-and-hazards",
                "name": "Failure modes and hazards",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Refractory erosion, cracking or chemical attack can cause molten-metal leakage or breakout.",
                  "Water contacting molten metal can cause violent steam generation and explosions; cooling-water leaks and wet charge materials are important causes.",
                  "Fuel leaks, failed ignition or loss of flame supervision can create fire and explosion hazards in fuel-fired equipment.",
                  "Carbon monoxide, metal fumes and process dust can cause poisoning or harmful exposure when containment or extraction fails.",
                  "Electrical faults, arc flash, hot surfaces and radiant heat can cause severe injury; temperature-control failures can also damage equipment and product."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-regional-variation",
                "name": "Regional variation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Applicable safety, electrical, emissions and occupational-exposure requirements vary by jurisdiction.",
                  "Fuel availability, electricity supply and local feedstocks influence the furnace technologies used."
                ],
                "questions": [
                  {
                    "id": "evidence-regional-variation-q01",
                    "text": "Which of these regional variation hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-neighbours",
                "name": "Neighbouring kinds and how to tell them apart",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "name": "Industrial furnace",
                    "difference": "The broader class includes thermal equipment for glass, ceramics and other materials; metallurgical furnaces specifically process metals or metal-bearing materials."
                  },
                  {
                    "name": "Smelter",
                    "difference": "A smelter commonly denotes a plant or integrated operation that extracts metal from feedstock; a furnace is an apparatus within such an operation."
                  },
                  {
                    "name": "Crucible",
                    "difference": "A crucible is a vessel that contains material during heating; a crucible furnace supplies heat around that vessel."
                  },
                  {
                    "name": "Ladle",
                    "difference": "A ladle primarily contains and transfers molten metal; a ladle furnace adds equipment for active heating and metallurgical treatment."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of metallurgical furnace this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Does the registry intend this entry to include all metal heat-treatment furnaces, ore-roasting furnaces, and actively heated ladle systems, or are some already owned by neighboring models?",
    "Which furnace-family distinctions are needed to cover the registry's intended breadth without imposing melting-specific attributes on solid-state treatment equipment?",
    "Which current standards and regulatory requirements apply by furnace technology, metallurgical duty, and jurisdiction, and what evidence establishes their applicability?",
    "What authoritative sources provide comparable capacity, temperature, uniformity, throughput, and energy ranges for each included furnace family?",
    "Which family-specific failure mechanisms, inspection criteria, and return-to-service requirements can be supported by manufacturer or recognized technical documentation?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 18,
    "questions": 30
  }
}
