HTHM-70A Fully Automatic Hardgrove Grindability Index Tester-Henan Hengte Technology Co., Ltd

HTHM-70A Fully Automatic Hardgrove Grindability Index Tester

HTHM-70A Fully Automatic Hardgrove Grindability Index Tester Compliant with GB/T 2565-2014 ("Determination of Hardgrove Grindability Index of Coal"). Designed specifically for testing the grindability of bituminous coal and anthracite, the results are expressed as the Hardgrove Grindability Index (HGI)—higher values indicate easier grindability. The instrument provides accurate data to guide coal mill design and operation.

Features:

Compact & Space-Saving: Sleek design with small footprint, ideal for laboratory environments.
Fully Automated Operation:
1. One-button start for complete grinding process.
1. Precise automatic counting.
1. Auto-lifting grinding bowl eliminates manual handling.
1. Low-maintenance design.

Compliant with GB/T 2565-2014 (“Determination of Hardgrove Grindability Index of Coal”). Designed specifically for testing the grindability of bituminous coal and anthracite, the results are expressed as the Hardgrove Grindability Index (HGI)—higher values indicate easier grindability. The instrument provides accurate data to guide coal mill design and operation.

Upgraded from HM-60G, the CX-HM70A retains all legacy functions while offering enhanced sealed, eco-friendly manufacturing aligned with national environmental standards. Widely used in coal, power, new energy, metallurgy, and chemical industries for grindability analysis.

Structural Highlights

The tester consists of:

Base unit
Electrical control box
Motor
Grinding assembly (straight gears, weights, spindle, grinding ring, steel balls, grinding bowl)
Lifting mechanism

Key Innovations:

Smart Touchscreen Control:
1. Real-time status/progress display.
1. Bilingual (Chinese/English) input with voice prompts.
Automated Functions:
1. Auto-lifting grinding bowl.
1. Auto-loading, auto-counting, and auto-stop at target rotations.
1. Power-off data retention.
1. Emergency stop button.
Data Management:
1. Storage, query, deletion, and password protection.
1. Built-in micro-printer for automatic HGI calculation and reporting.
Calibration:
1. Embedded linear regression correction program.
1. Auto-calculation and storage of correction results.

Technical Specifications

Parameter	Specification
Model	HTHM-70A
Spindle Speed (r/min)	20 ± 1
Operating Rotations (r)	60 ± 0.25
Grinding Pressure (N)	284 ± 2
Grinding Bowl Capacity (g)	50
Steel Ball Diameter (mm)	25.4
Noise Level (dB)	≤65
Power Supply (V)	AC 220
Motor Power (W)	200
Weight (kg)	60