Coal & Coke Testing Equipment
Hardgrove Grindability Index Tester Coal Grindability Determination Apparatus
Item Number : KT-TE17
Price varies based on specs and customizations
- Grinding Load Force
- 284 N ± 2 N
- Spindle Operating Speed
- 20 rpm
- Pre-Set Test Cycle
- 60 Revolutions (Auto-Shutoff)
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Product Overview
This precision Hardgrove grindability index tester is an essential benchtop apparatus engineered to evaluate the relative grindability and ease of pulverization of bituminous coal and anthracite. Built in strict accordance with the national standard GB2565-2014 and international Hardgrove test methodologies, the instrument operates on the proven comminution principle that energy consumed during mechanical pulverization is directly proportional to the newly created coal powder surface area. By processing carefully prepared coal specimens under uniform mechanical stress, this unit allows test facilities to accurately calculate the Hardgrove Grindability Index (HGI) to optimize industrial crushing, pulverizing, and combustion systems.
Designed for rigorous industrial duty, the equipment serves as a cornerstone testing system for thermal power generation plants, metallurgical coke facilities, commercial inspection bureaus, coal preparation plants, and academic research institutions. Fuel engineers and quality control managers utilize the resulting HGI values to predict mill throughput, optimize boiler combustion efficiency, calculate energy consumption in coal mills, and formulate cost-effective solid fuel blends.
Constructed with a heavy-duty mechanical frame and an advanced drive train, the apparatus guarantees exceptional structural rigidity and operational consistency even under continuous testing schedules. By pairing an automated microcomputer cycle counter with an integrated mechanical push-up bowl platform, this system eliminates operator fatigue and test variability, providing dependable data that industrial procurement and laboratory teams can trust for critical fuel management decisions.
Detail & Parts
Key Features
- Ergonomic Push-Up Bowl Elevation System: Features an integrated mechanical jack-style lifting mechanism beneath the grinding bowl assembly, completely eliminating the strenuous manual effort previously required to lift, hold, and lock heavy grinding vessels in position while significantly enhancing seating alignment and operational accuracy.
- Precision Microcomputer Revolution Controller: Utilizes an intelligent digital counter pre-configured to execute an exact 60-revolution cycle at 20 rpm before automatically disengaging the drive mechanism, preventing operator timing errors and safeguarding test repeatability across multiple sample runs.
- Emergency Stop with Cumulative Revolution Recovery: Incorporates a smart microcomputer memory function that permits instantaneous emergency shutdown in the event of an operational anomaly; upon clearing and restarting, the system seamlessly resumes and accumulates remaining cycles to complete the mandatory 60 revolutions without voiding the sample.
- Calibrated Precision Working Load: Delivers an exact vertical grinding force of 284 N ± 2 N across eight precision steel balls, maintaining standard-compliant mechanical contact pressure throughout the entire comminution phase for uncompromised metrological consistency.
- High-Torque Worm Gear Speed Reducer: Powered by a heavy-duty WTC40-40VI industrial reducer providing a robust 1:72 overall reduction ratio, ensuring whisper-quiet mechanical power transfer, zero slippage, and an uninterrupted 20 rpm operating speed under full grinding resistance.
- Hardened Wear-Resistant Grinding Chamber: Fabricated using precision-machined, high-hardness alloy steel components for both the grinding bowl track and the lower grinding ring, minimizing baseline wear contamination and extending component service life during routine testing of abrasive coals.
- Heavy-Duty Cast Iron Frame: Built upon a vibration-dampening structural cast foundation that absorbs kinetic vibrations generated during the grinding cycle, ensuring benchtop stability, zero structural drift, and long-term mechanical alignment.
- Standard-Compliant Testing Protocols: Fully engineered to meet the requirements of GB2565-2014 (Hardgrove Method for Determination of Coal Grindability Index), enabling direct calibration against standard certified coal samples to produce universally accepted HGI values.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Thermal Power Generation | Evaluating incoming bituminous coal supplies to predict ball mill wear rates, calculate mill energy consumption, and optimize fuel pulverizer output. | Maximizes pulverizer throughput, prevents boiler flame instability, and reduces specific grinding power consumption across utility-scale generating units. |
| Metallurgical Coke & PCI Operations | Assessing pulverized coal injection (PCI) suitability and raw coking coal blends used in blast furnace ironmaking processes. | Ensures uniform coal fineness for rapid combustion in the raceway zone, reducing blast furnace coke rates and preventing tuyere blockage. |
| Commercial Inspection & Testing Labs | Conducting independent third-party fuel certification, custody transfer assessments, and trade dispute arbitrations for coal shipments. | Delivers fully auditable, standard-compliant test data with minimal operator dependency and maximum inter-laboratory reproducibility. |
| Coal Mining & Preparation Plants | Classifying mined coal seams and monitoring beneficiated washed coal products across different processing circuits. | Enables accurate grade classification, informs dynamic coal blending strategies, and commands premium market pricing through certified fuel grading. |
| Cement & Lime Kiln Firing | Characterizing solid fuels destined for rotary kiln calcination systems to determine pulverizer capacity requirements. | Assures uniform flame shape and stable calcining temperatures while lowering electrical energy expenditure in clinker production. |
| Academic Combustion Research | Investigating coal petrology, comminution kinetics, grindability variances, and mechanical energy-to-surface-area conversion ratios. | Yields high-precision empirical data under strictly regulated kinetic and pressure parameters for reproducible scholarly studies. |
Technical Specifications
| Parameter | Specification (KT-TE17) |
|---|---|
| Equipment Model Number | KT-TE17 |
| Spindle Operating Speed | 20 rpm |
| Standard Test Cycle Limit | 60 revolutions (automatic microcomputer shutoff) |
| Calibrated Grinding Load Force | 284 N ± 2 N |
| Total Gear Reduction Ratio | 1:72 |
| Speed Reducer Specification | WTC40-40Ⅵ Industrial Worm Reducer |
| Motor Power Rating | 90 W |
| Electrical Power Requirements | 3-Phase, 380 V AC, 50 Hz |
| Grinding Bowl Elevating Mechanism | Built-in push-up mechanical jack structure |
| Controller Type | Digital LED revolution display with microcomputer counting |
| Safety & Interruption Controls | Emergency stop with cumulative cycle recovery on restart |
| Applicable Standard | GB2565-2014 (Hardgrove Method) |
| Applicable Sample Types | Bituminous coal, anthracite, and related solid carbonaceous fuels |
Why Choose This Product
- Operator-Centric Mechanical Engineering: By replacing obsolete manual bowl placement with a precision bottom push-up jack design, this instrument completely eliminates physical strain, prevents misaligned grinding bowls, and reduces operator error during high-throughput routine testing.
- Uncompromising Metrological Precision: Every unit is factory-calibrated to deliver the precise 284 N ± 2 N downward load force and steady 20 rpm speed required by GB2565-2014, ensuring that your calibration charts and calculated HGI figures match certified standards without discrepancy.
- Intelligent Microcomputer Reliability: The automated 60-cycle shutdown mechanism removes all guesswork from testing duration, while the advanced fault-recovery memory allows operators to pause, inspect, and resume tests without discarding valuable prepared coal samples.
- Industrial-Grade Durability: Outfitted with an industrial-tier WTC40-40VI worm reducer, a rigid casting base, and high-hardness alloy grinding elements, this equipment withstands thousands of pulverization cycles in high-throughput fuel laboratories with minimal maintenance downtime.
- Full-Spectrum Technical Backing: Supported by comprehensive application expertise, spare parts availability (including precision grinding balls and matching calibrated bowls), and dedicated technical assistance to ensure smooth laboratory integration.
Contact our technical sales team today to request a formal quotation or discuss your specific coal testing laboratory configuration.
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