Assay Equipment Accessories & Consumables
Coal Hardgrove Grindability Index Standard Reference Material Set for Calibration
Item Number : KT-HS
Price varies based on specs and customizations
- Certified HGI Range
- Nominal ~40, ~60, ~80, and ~110 HGI
- Compliance Standard
- GB/T 2565
- Standard Reference Codes
- GBW12005, GBW12006, GBW12007, GBW12008
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Product Overview
This certified coal reference material set provides the fundamental metrological baseline for calibrating, validating, and maintaining Hardgrove Grindability Index testing machinery. Comprising four precisely characterized coal reference standards spanning distinct hardness gradations, the suite enables analytical laboratories to construct highly accurate linear calibration curves. By establishing the empirical mathematical correlation between ground coal mass and certified grindability metrics, this system ensures that subsequent commercial and industrial coal evaluations remain legally defensible and scientifically sound.
Engineered to satisfy the rigorous demands of GB/T 2565 and related international methodologies, this reference suite serves as an essential quality tool across thermal power generation plants, metallurgical coke facilities, coal washing operations, commercial inspection authorities, and geological research laboratories. Facility managers and laboratory directors depend on these standardized coal samples to verify the operational readiness of pulverizers and benchtop grinding bowls, thereby predicting mill power draw, estimating throughput rates, and monitoring overall milling efficiency under variable fuel supplies.
Prepared through rigorous blending, homogenization, and hermetic packaging protocols, the certified coal standards exhibit outstanding inter-bottle uniformity and protracted shelf stability. Even when exposed to challenging industrial laboratory environments, each sealed sample preserves its intrinsic mechanical resistance and moisture equilibrium, giving testing teams total confidence in their instrument verification routines, proficiency tests, and routine quality assurance audits.
Detail & Parts
Key Features
- Four-Point Metrological Calibration Curve: Spans the complete practical coal hardness spectrum with certified nominal grindability ratings of approximately 40, 60, 80, and 110 HGI, establishing an expansive linear calibration baseline that minimizes extrapolation error across all commercial coal ranks.
- Certified Traceability to National Reference Standards: Formulated in strict alignment with national certified reference materials GBW12005, GBW12006, GBW12007, and GBW12008, assuring laboratory managers of unbroken measurement traceability, regulatory compliance, and audit-ready verification records.
- Strict Compliance with GB/T 2565 Methodologies: Processed to fulfill the precise technical specifications governing sample consistency, sieving dynamics, and mechanical grindability determination, allowing seamless adoption into standardized coal inspection workflows.
- Individual Moisture-Proof Hermetic Packaging: Supplied in four separate 250 g high-density containers sealed against ambient moisture penetration and atmospheric oxidation, preventing sample degradation and ensuring consistent performance over extended storage intervals.
- Superior Inter-Bottle Homogeneity: Undergoes multi-stage rotary splitting and precision homogenization to achieve minimal matrix uncertainty, ensuring that repeated calibration runs produce virtually identical grindability profiles and minimal standard deviations.
- Critical Mechanical Diagnostic Utility: Functions as an objective benchmark to detect mechanical misalignment, spindle wear, bearing play, and load inconsistencies within the Hardgrove grinding bowl assembly before equipment wear compromises testing integrity.
- Optimized Granulometric Preparation: Pre-screened and prepared within tight particle size tolerances, drastically reducing preliminary laboratory handling while ensuring uniform interaction with the grinding balls and raceway under standardized test conditions.
- Economical Multi-Cycle Sample Volume: Delivers 1,000 g of total reference material across the four distinct hardness grades, providing sufficient volume for numerous multi-point calibration campaigns, routine re-verifications, and inter-laboratory proficiency rounds.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Coal-Fired Thermal Power Utilities | Periodic calibration of laboratory grindability analyzers to forecast power station pulverizer performance, mill wear rates, and specific electricity consumption. | Prevents boiler mill derating and optimizes auxiliary power usage by ensuring accurate fuel grindability forecasting. |
| Commercial Commodity Inspection | Generating legally compliant calibration curves for third-party testing laboratories engaged in coal valuation, tariff assignment, and cargo settlement. | Eliminates commercial disputes and financial liability by providing undeniable metrological traceability to national standards. |
| Metallurgical Coke Manufacturing | Classifying coking coals and pulverized coal injection (PCI) grades according to their mechanical pulverization resistance prior to blast furnace charging. | Enhances blast furnace injection stability, maintains optimal permeability, and prevents premature milling equipment damage. |
| Cement Clinker Production | Calibrating grindability apparatus to evaluate raw fuel hardness for vertical roller mills and ball mills within cement kiln firing systems. | Lowers energy consumption per ton of clinker and minimizes pulverizer maintenance shutdowns through precise grinding optimization. |
| Hardgrove Machine Mechanical Validation | Diagnostic testing to verify machine tolerances, including the 29.0 kg vertical load, spindle revolution count, and race ring ball contact uniformity. | Identifies mechanical wear or structural deflection early, preventing systematic laboratory measurement errors. |
| Synthetic Fuels and Gasification Feedstock Analysis | Evaluating the ease of grinding for prospective gasifier feedstocks to guarantee proper particle size distribution in gasification burners. | Ensures steady syngas conversion rates and prevents unburned carbon loss or nozzle plugging caused by improper fuel fineness. |
| Proficiency Testing and Laboratory Accreditation | Serving as blind reference standards for internal quality control, inter-laboratory comparisons, and ISO/IEC 17025 technical audits. | Validates laboratory operator competency, sieving consistency, and repeatability under accredited quality management systems. |
Technical Specifications
| Specification Parameter | System Value / Standard Detail |
|---|---|
| Product Item Number | KT-HS |
| Standard Compliance | GB/T 2565 (Determination of Grindability Index of Coal - Hardgrove Machine Method) |
| Primary Function | Calibration and validation of Hardgrove Grindability Index (HGI) instruments |
| Metrological Functionality | Construction of four-point linear regression calibration curve and result traceability |
| Complete Set Configuration | 4 bottles per set (1 bottle per hardness level) |
| Unit Bottle Weight | 250 g ± 1 g per bottle |
| Total Set Net Weight | 1,000 g (4 × 250 g) |
| Packaging Material | High-barrier airtight polymer bottles with hermetic inner tamper-evident seals |
| Grinding Equipment Compatibility | Standard Hardgrove Grindability Index testing apparatus |
| Nominal Grinding Load Requirement | 29.0 ± 0.2 kg (64.0 ± 0.5 lbs) vertical force |
| Prescribed Instrument Revolutions | 60 ± 0.25 revolutions |
| Analytical Sieving Specification | Certified 0.075 mm (200 mesh) analytical test sieve |
| Recommended Storage Environment | Cool, dry, dark environment; ambient temperature 15°C to 28°C; relative humidity < 60% |
| Item Number Variant | Reference Standard Code | Nominal Certified HGI Value | Material Hardness Classification | Package Volume |
|---|---|---|---|---|
| KT-HS-40 | GBW12005 | ~40 HGI | High Hardness (Difficult to Grind) | 250 g |
| KT-HS-60 | GBW12006 | ~60 HGI | Medium-High Hardness (Moderately Hard) | 250 g |
| KT-HS-80 | GBW12007 | ~80 HGI | Medium-Low Hardness (Easy to Grind) | 250 g |
| KT-HS-110 | GBW12008 | ~110 HGI | Low Hardness (Very Easy to Grind / Friable) | 250 g |
Why Choose This Product
- Unbroken Metrological Traceability: Direct correlation to recognized national certified reference materials eliminates measurement disputes, providing commercial laboratories with absolute legal defensibility during trade arbitrations and statutory reporting.
- Comprehensive Hardness Range Coverage: Spanning four nominal values from 40 to 110 HGI ensures complete operational coverage of both hard anthracites and friable lignites, delivering superior curve linearity and reducing measurement uncertainty across all coal grades.
- Engineered Long-Term Chemical and Physical Stability: The advanced barrier bottling prevents oxidation and moisture exchange, preserving the authentic mechanical properties of each coal grade and ensuring dependable reproducibility across multiple calibration cycles.
- Turnkey Integration with Standard Testing Equipment: Fully harmonized with standard Hardgrove grinding apparatus and GB/T 2565 test procedures, eliminating the need for specialized adapters, secondary processing, or complex mathematical conversion factors.
- Comprehensive Technical and Quality Support: Backed by dedicated materials specialists who understand the nuances of coal petrology, grinding mechanics, and instrument calibration, ensuring prompt technical guidance for laboratory accreditation and troubleshooting.
Contact our technical sales team today to request a quotation, obtain certified analysis documentation, or discuss tailored reference material packages for your coal testing laboratory.
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