Clay shale, chalk, brick, slag, clinker, feldspar, coke etc. It applies to cement chemical industry, electric power, metallurgy, construction, refractory and other industrial department including limestone, slag, coke, steel slag etc.

Feed size:≤100mm
Productive capacity:60-300t/h

Application:Highway, railway, high-rise buildings, municipal, hydropower dam construction, concrete mixing station, sand and stone field, etc.

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High-Pressure Grinding Rolls (HPGR)

Industrial Energy-Saving & Eco-Friendly Fine Crushing Platform for Hard Rock Mining, Aggregate Manufacturing, and Cement Milling Circuits.

Product Introduction

The High-Pressure Grinding Roll (HPGR) represents a revolutionary technological leap in sustainable, eco-friendly fine crushing and mineral processing. Operating on the cutting-edge principle of inter-particle bed compression, the HPGR replaces legacy impact or dynamic shear machinery with immense, uniform static forces. By generating multi-megascal compression fields, it crushes minerals against other minerals within a continuous material bed. This configuration yields a tightly controlled output profile while significantly reducing overall electricity draw, making it the premier choice for plants focused on carbon emission reduction and asset modernization.

Global Application Matrices

■ Hard Rock Mining

Processes highly abrasive metal formations including gold quartz, copper porphyry, iron magnetite/hematite, and molybdenum ores. Induces extensive micro-fracturing along natural grain boundaries to improve downstream milling performance.

■ Premium Aggregate Production

Transforms hard river pebbles, granite, and basalt into premium commercial manufactured sand. Delivers high cubical particle counts with minimal needle or flaky shapes, meeting strict engineering quality codes.

■ Industrial Cement Milling

Pre-grinds raw limestone, dolomite, slag additives, and tough cement clinker. Greatly reduces specific power consumption during fine sizing, stabilizing overall batch chemistry and output quality.

Core Strategic Advantages

✓Significant Energy Savings: Slashes processing power requirements by 30% to 45% compared to traditional cone, hammer, or impact crushing circuits, directly lowering plant utility expenses.
✓High Mechanical Uptime: High-volume choke feeding combined with rapid processing allows plants to maintain continuous 24/7 schedules, satisfying large-scale commercial output targets.
✓Excellent Grain Quality: The uniform bed compression creates well-distributed, consistent gradations with high cubical fractions, optimizing performance in downstream industrial setups.
✓Media-Free Comminution: Operates entirely without additional steel grinding balls or rods. Simplifies routine maintenance and substantially lowers wear parts cost per ton of feed.
✓Low-Emission Design: Features a fully sealed structural housing with integrated dust collector ports. Low rotational speeds limit workplace noise pollution and dust migration for cleaner plant environments.

Advanced Engineered Technical Features

■ Integrated Automation Matrix: Built-in automatic full-bin choke gate controls, real-time hydraulic proportional gap adjusting loops, and a user-friendly digital system manage stable operation without requiring manual recalibration.

■ Heavy-Duty Alloy Shell Liners: Built around a high-load solid forged shaft core wrapped in centrifugally cast high-chrome wear liners. This advanced metallurgy allows the wear parts to operate safely even when worn down to just 1 cm of thickness.

■ Industry-Leading Operational Metrics: Achieves a verified roller liner utilization rate of up to 90% and a finished product yield up to 85%. By minimizing over-grinding, it drops fine waste powder generation down to just 5%, providing an ideal solution for premium manufactured sand plants.

Working Principle Explained

The core configuration of the HPGR features two identical, parallel rollers spinning inward toward each other at fixed, controlled speeds. One roller remains anchored to the frame, while the moveable roller connects to high-capacity hydraulic accumulator rams. As materials fill the feed chute, the automatic gate builds a dense material bed between the rollers. The tremendous hydraulic force applies steady pressure through this layer, breaking the minerals via stone-on-stone contact. Sized materials discharge instantly out the open bottom via gravity, while an integrated PLC system dynamically opens the gap to pass uncrushable foreign iron without damage.