anthracite
Enable an agent to recognise anthracite, assess a particular lot's quality and condition, and determine its suitability for a proposed use.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise anthracite, assess a particular lot's quality and condition, and determine its suitability for a proposed use.
Anthracite is a hard, lustrous, high-rank coal formed through advanced coalification, distinguished by high fixed-carbon content and low volatile-matter content relative to lower-rank coals.
It can be Evaluate a claimed anthracite identity against a named rank classification.; Compare supplied lots using measurements expressed on compatible analytical bases.; Select or reject a particle-size grade against a specified application requirement.; Request representative sampling or additional testing where evidence is missing or stale.; Qualify a lot for a stated use and record the conditions attached to acceptance.; Flag material-condition changes or documented hazards requiring handling controls..
Distinguishing features
Require a named coal-rank classification and supporting analytical results; black colour, gloss or a supplier label alone do not establish anthracite identity.
Distinguish anthracite from neighbouring coal ranks using the chosen classification's criteria and analytical basis rather than an unsupported universal carbon threshold.
Distinguish naturally occurring anthracite from coke, char and activated carbon through formation and processing history.
Distinguish an anthracite lot from a blended fuel or formulated filter product by recording added constituents and their proportions.
Treat particle-size names and application grades as separate from geological rank: a filtration designation or trade size does not independently establish rank.
Scope
+ Evidence identifying the material as anthracite under a stated coal-rank classification
+ Origin, sampling history and variability within a deposit or supplied lot
+ Composition and fuel-quality measurements with their analytical bases
+ Particle-size grade, physical integrity, moisture and contamination
+ Suitability and constraints for combustion, filtration or other specified applications
+ Material-specific handling hazards and applicable commercial or regulatory identifiers
- Coal deposits, mine design and extraction operations
- Combustion equipment, operating procedures and plant emissions control
- Water-treatment system design and treated-water compliance
- Coke, activated carbon, graphite and manufactured carbon products as separate materials
- Transport infrastructure, supply contracts and commodity-market pricing
Characteristics
- Coal rank and classification basis
- Named classification, edition, assigned class and supporting test results Makes the anthracite identification testable and exposes differences between classification systems.
- Origin and processing history
- Deposit or supplier lot linked to extraction, washing, sizing, blending and treatment records Connects identity and quality evidence to the material actually being assessed.
- Proximate analysis
- Moisture, volatile matter, ash and fixed carbon in mass %, each with method and reporting basis Supports rank assessment and fuel-quality comparison without conflating unlike analytical bases.
- Elemental composition
- Carbon, hydrogen, nitrogen, sulfur and oxygen in mass %; method, basis and measured or calculated status Separates elemental carbon from fixed carbon and informs application constraints.
- Trace constituents and contamination
- Analyte-specific mg/kg or mass %, detection limits and test method Allows acceptance decisions for applications sensitive to impurities or material release.
- Heating value
- MJ/kg, gross or net, with moisture basis and test method Supports meaningful fuel comparison and equipment-specific acceptance.
- Particle-size distribution
- Sieve openings in mm and mass % retained or passing; named commercial size where applicable Determines whether a lot meets feed-size or filtration-media requirements.
- Density and packing
- kg/m³, distinguishing particle density from loose or compacted bulk density Supports storage, dosing and media-bed calculations.
- Mechanical durability
- Abrasion, attrition or friability result under a named method Indicates whether handling or service will generate unacceptable fines.
- Current lot condition
- Observed moisture, fines, foreign matter, temperature and inspection timestamp Separates present condition from historical supplier specifications.
- Application qualification
- Lot linked to intended use, acceptance specification, test evidence and qualification status Prevents treating suitability for one application as suitability for every application.
- Hazard and regulatory identity
- Supplier safety data, jurisdiction, identifiers where applicable, classification date and supporting evidence Supports handling decisions without assuming a single universal identity or hazard classification.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.anthracite
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Anthracite identity Establishes what supports calling the material anthracite and where that identity ends.
Rank, trade terminology and manufactured carbon products can otherwise be mistaken for equivalent identities.
Rank evidence
Connects the rank assignment to an explicit classification and analytical basis.
Supported rank assignment
Record the classification used and the evidence supporting its anthracite designation.
- Which classification and edition define anthracite for this assessment? definition
- Which test results, corrections and reporting bases support the assigned rank? measurement
Material boundary
Separates anthracite from neighbouring coal ranks, processed carbons and mixtures.
Natural material or derived product
Record processing and added constituents needed to establish whether the assessed object remains an anthracite material lot.
- What origin and treatment records distinguish this material from coke, char or activated carbon? provenance
- Does the supplied material include other coals, binders or additives that require a mixture or product model? boundary
Lot composition Captures representative composition and the limits of laboratory evidence.
An anthracite designation does not establish a particular lot's moisture, ash, sulfur or contaminant content.
Sampling and variability
Connects laboratory samples to the quantity of material they represent.
Representative lot evidence
Record lot boundaries, sample collection and evidence of variation.
- Which deposit, shipment or stockpile does the sample represent, and how was it collected? provenance
- What variation or sampling uncertainty could change the lot's acceptance decision? measurement
Analytical composition
Keeps composition measurements comparable and distinguishes measured values from calculated quantities.
Comparable composition results
Record proximate, elemental and application-relevant impurity analyses with their methods and bases.
- What are the moisture, ash, volatile matter and fixed-carbon results, and on which basis is each reported? measurement
- Which elemental and trace-constituent results are available, including methods, detection limits and calculated values? measurement
Physical grade and condition Describes the supplied particle population and changes caused by storage or handling.
Lots of the same rank can behave differently because of sizing, packing, breakage and moisture.
Size and packing
Translates commercial grade names into measurable particle and bulk properties.
Verified physical grade
Record sieve distribution and density measurements supporting the supplied grade.
- What sieve limits and measured size distribution support the commercial grade name? measurement
- Which particle and bulk density values were measured, and under what packing and moisture conditions? measurement
Condition and degradation
Assesses whether current material condition still matches its qualification evidence.
Handling-related quality change
Record fines generation, moisture change and contamination since the last accepted assessment.
- What inspections or durability tests show breakage, fines, moisture change or foreign matter? measurement
- Do these changes require resampling, screening, segregation or rejection under the intended-use specification? action
Application performance Links anthracite properties to the requirements of a specific use.
Fuel acceptance and filtration-media acceptance depend on different evidence.
Fuel qualification
Assesses the lot against the requirements of a nominated combustion application.
Fuel specification fit
Record fuel properties and compatibility evidence required by the receiving equipment.
- What heating value, moisture, ash, sulfur and size limits does the receiving application impose? boundary
- What test or operating evidence supports acceptance, including ignition, burnout and ash behaviour where required? action
Filter-media qualification
Assesses anthracite offered as filter media against the intended service specification.
Filter-media specification fit
Record media sizing, durability, cleanliness and service-specific qualification evidence.
- Which effective-size, uniformity, density and attrition requirements apply, and what results demonstrate compliance? measurement
- What cleanliness, leaching or water-contact evidence is required before this lot may enter the intended filtration service? action
Handling and regulatory constraints Connects the material's documented hazards and identity to its supplied form and jurisdiction.
Handling decisions require evidence about the actual lot and exposure conditions, not assumptions drawn from the name alone.
Dust and storage assessment
Identifies evidence needed to manage dust exposure and thermal or combustion hazards.
Condition-specific hazard evidence
Record applicable hazard information, test evidence and controls for the material's particle size and handling conditions.
- What safety data or testing addresses inhalable and respirable dust, relevant mineral constituents, dust ignition and self-heating for this material? provenance
- Which exposure, ventilation, housekeeping and storage controls follow from that evidence and the actual handling conditions? action
Documented commercial identity
Tracks identifiers and classifications without treating anthracite as a pure compound with invariant properties.
Applicable identifiers and classifications
Record identifiers, safety classifications and transport statements with their documentary scope.
- Which identifiers and classifications appear in the supplier's current documentation, and which material or product do they identify? provenance
- Which jurisdiction, supplied form and intended use govern the applicability of those records? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes the geological and commercial coal sense, not the colour name; all statements are recalled rather than source-verified.
- Check the applicable edition and classification system before applying rank boundaries; fixed carbon is a proximate-analysis quantity, not elemental carbon purity.
- Ash, sulfur, moisture, heating value, density and contaminant content require sample-specific measurements; anthracite has no single molecular formula or characteristic melting and boiling points.
- Which of these check these first hold for the sense of anthracite this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Anthracite sensu stricto
- Semi-anthracite, within the broader anthracitic rank group
- Meta-anthracite, within the broader anthracitic rank group
- Which of these kinds and varieties hold for the sense of anthracite this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ASTM International ASTM D388, Standard Classification of Coals by Rank
- American Water Works Association AWWA B100, Filtering Material, relevant to anthracite used as filter media
- Which of these standards and regulation hold for the sense of anthracite this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Domestic and commercial heating in suitable solid-fuel appliances
- Industrial fuel
- Granular media in water filtration
- Carbon feedstock for metallurgical applications, including processed or calcined grades
- Which of these real-world use hold for the sense of anthracite this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Fixed carbon for anthracite sensu stricto under ASTM rank classification - 92 to less than 98, on a dry mineral-matter-free basis - mass %
- Volatile matter for anthracite sensu stricto under ASTM rank classification - Greater than 2 to 8, on a dry mineral-matter-free basis - mass %
- Which of these typical measurements hold for the sense of anthracite this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Respirable coal dust can cause chronic lung disease; associated crystalline silica may add a separate inhalation hazard.
- Incomplete combustion can produce carbon monoxide.
- Combustion releases carbon dioxide and, depending on composition and controls, sulfur oxides, nitrogen oxides and particulate matter.
- Low volatile content makes ignition and sustained combustion difficult in unsuitable appliances.
- Filter-media attrition, fouling or unsuitable particle sizing can impair filtration performance.
- Which of these failure modes and hazards hold for the sense of anthracite this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Coal-rank terminology and classification boundaries differ between national and international systems.
- Pennsylvania anthracite is a prominent commercial designation, but geographic origin alone does not establish rank or quality.
- Commercial size and grade names vary by market and intended application.
- Which of these regional variation hold for the sense of anthracite this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Bituminous coal - A lower coal rank, generally with more volatile matter; rank classification requires laboratory analysis on a specified reporting basis.
- Coke - Coke is manufactured by heating carbonaceous feedstock with restricted oxygen; anthracite is a naturally occurring coal.
- Graphite - Graphite is a crystalline carbon mineral; anthracite remains a heterogeneous coal with organic matter and mineral constituents.
- Activated carbon - Activated carbon is processed to develop substantial adsorption capacity; ordinary anthracite filter media primarily remove particles.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of anthracite this model covers, and on what evidence? provenance
What the second pass must settle
- Which coal-rank classification should anchor the registry definition, and how should differing anthracite subclasses be mapped without creating duplicate registered things?
- Which identifiers legitimately cover natural anthracite, and which instead identify broader coal categories or specific commercial products?
- Which analytical and sampling methods are needed to compare lots reliably across suppliers and reporting bases?
- Which application standards establish acceptance criteria for fuel use and filtration media, including water-contact requirements where relevant?
- What evidence establishes dust, mineral-impurity, ignition and self-heating hazards for different anthracite grades and supplied particle sizes?