Touchscreen Hardgrove Grindability Index Tester Automated Coal Grindability Analyzer

Product Overview

This touchscreen Hardgrove grindability index tester provides automated determination of relative coal grindability, quantifying how easily solid fuels can be pulverized for industrial combustion and processing. Operating on Rittinger’s classical comminution law—which establishes that the energy consumed in grinding is directly proportional to the newly created surface area—this instrument eliminates manual calculation discrepancies through automated rotational control and digital linear regression curve matching. It delivers rapid, highly repeatable Hardgrove Grindability Index (HGI) metrics that directly inform fuel blending, pulverizer capacity planning, and mill power consumption.

Engineered specifically for central testing laboratories, thermal power generation plants, metallurgical coke facilities, commercial inspection bureaus, and mining operations, the apparatus streamlines standard sample evaluation. By standardizing the mechanical stress applied to carefully sized coal samples (0.63 mm to 1.25 mm), the equipment establishes a dependable baseline for process engineers optimizing boiler feed, pulverizer efficiency, and energy throughput under rigorous operational requirements.

Built with a rigid mechanical core, precision-guided spindle drive, and vibration-damped structural housing, this testing unit maintains steady performance under high-volume laboratory workloads. The integration of advanced microprocessor automation with a heavy-duty loading assembly ensures strict adherence to national and international testing protocols, delivering dependable precision across diverse coal grades ranging from low-rank lignites to hard anthracites.

Key Features

• Automated Revolution Precision: High-precision optical rotation counting automatically halts the primary spindle precisely at 60 ± 0.25 revolutions, eliminating over-grinding errors and ensuring complete consistency across consecutive test runs.
• Constant-Force Spindle Loading: A precision-calibrated load assembly consistently applies 284 ± 2 N of vertical force to the grinding ball path, guaranteeing uniform mechanical stress distribution across the entire sample charge.
• Controlled Spindle Velocity: The heavy-duty geared drive mechanism maintains a continuous rotational velocity of 20 ± 1 r/min, eliminating erratic torque pulses and preserving steady grinding kinematics throughout the cycle.
• Integrated Microcomputer Regression Engine: The built-in intelligence matches test results against certified reference material calibration curves (GBW12005b–GBW12008b) via automated unitary linear regression, calculating definitive HGI values instantly without manual plotting.
• Intuitive Touchscreen Interface: An industrial-grade color touchscreen streamlines workflow parameters, displays live cycle status, and guides operators step-by-step through grinding, screening, and weighing data entry.
• Digital Data Storage and Traceability: An onboard memory register stores multiple batches of calibration data, raw specimen weights, and final HGI metrics to prevent record loss and ensure compliance with laboratory audit trails.
• Heavy-Duty Structural Rigidity: Fabricated from cast structural alloys and hardened tool steels, the grinding bowl and ball assembly resist abrasive wear and mechanical deformation during repetitive processing of abrasive fuels.
• Rapid Release Grinding Bowl Assembly: Ergonomic mechanical clamping allows rapid loading and unloading of the 0.63–1.25 mm sample charge, speeding up turnaround times while protecting operators from repetitive mechanical strain.

Applications

Technical Specifications

Why Choose This Product

• Engineered for High-Accuracy Automation: By removing operator dependency from revolution timing and mathematical regression calculations, this unit delivers standard deviations well below industry tolerance thresholds, ensuring uniform HGI readings.
• Precision Metrology Compliance: The equipment strictly enforces the exact mechanical tolerances required by coal testing standards—including the mandatory 20 ± 1 r/min speed, 60 ± 0.25 revolution limit, and 284 ± 2 N load profile—guaranteeing audit-proof data.
• Durable Heavy-Duty Construction: Wear-critical components, including the precision grinding ring and hardened steel balls, are machined from specialized wear-resistant alloys to withstand continuous abrasion from high-ash coals without losing geometric tolerances.
• Comprehensive Modern Usability: The high-resolution touchscreen combined with pre-programmed national standard calibration sets (GBW series) eliminates paper charts, minimizes calculation errors, and cuts test cycle times by half.
• Professional Engineering Support: Backed by comprehensive technical assistance, standardized calibration guidance, and rapid-dispatch consumable wear components, this testing platform guarantees maximum operational uptime for busy industrial laboratories.

To upgrade your coal quality testing capabilities or request a comprehensive quotation for your facility, contact our technical sales team today.

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