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Help CenterOpen Circuit Ball Mill for Coarse Mineral Grinding
Product Spotlights
2.Low maintenance cost
3.Low over-grinding rate
4.Full line intelligent monitoring
5.High material utilization
6.Customized grinding fineness
7.Industrial large-scale production support
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1. Product Description
This professional open circuit ball mill for coarse mineral grinding is a simplified high-stability grinding system optimized for primary coarse grinding pretreatment in mineral processing lines, focusing on solving complex circuit failure, excessive fine mud generation and high operational costs caused by redundant closed-circuit configurations for rough grinding scenarios. Many mineral beneficiation processes require primary coarse particle refinement after crushing, where strict ultra-fine fineness control is unnecessary and simple, high-throughput rough grinding is the core demand. Traditional closed-circuit grinding systems with matched classifiers feature complex structure, high failure rate and tedious parameter debugging, causing over-grinding waste and increased operational investment for conventional coarse grinding tasks. Complicated circulating load adjustment and supporting auxiliary equipment also raise equipment maintenance workload and site layout requirements, which are not suitable for primary rough grinding working conditions. This open circuit ball mill takes simplified open-loop grinding structure, stable coarse particle refining performance and low operational threshold as core advantages, specially designed for standardized coarse mineral grinding pretreatment of various bulk ores after primary and secondary crushing. The standalone grinding unit integrates fixed-rate feeding system, heavy-duty coarse-grinding dedicated ball mill host and stable slurry discharging structure, forming a compact and efficient independent rough grinding station without supporting classification and circulating return equipment. It can be perfectly matched with upstream multi-stage crushing systems and downstream secondary fine grinding, gravity separation, rough flotation and pre-concentration processes. Adopting scientific coarse grinding medium grading scheme and open-loop balanced grinding parameters, the equipment eliminates redundant circuit configuration and over-grinding defects of closed-circuit systems, stably outputs uniform coarse ore particles meeting rough processing standards, and provides reliable low-cost, high-stability and simple-operation coarse grinding pretreatment guarantee for primary mineral processing procedures.
2. Working Principle
The open circuit ball mill for coarse mineral grinding adopts continuous open-loop one-way grinding and progressive coarse particle refinement principle, realizing stable high-throughput rough grinding and uniform particle sizing for primary mineral pretreatment. Pre-crushed bulk ore materials with qualified feeding particle size are stably and quantitatively delivered into the coarse grinding cylinder through a constant feeding system calibrated for open-loop continuous operation. Driven by the low-fluctuation stable transmission system, the grinding cylinder operates continuously at optimized coarse-grinding rotating speed, driving scientifically graded large-size grinding media to generate strong uniform impact, extrusion and shearing force targeted for bulk ore crushing and coarse refinement. Different from closed-circuit cyclic regrinding modes, this open-circuit system adopts one-way linear grinding logic, where materials complete full grinding progression in a single pass through the mill cylinder without particle return and cyclic processing. The equipment reasonably controls material residence time inside the cylinder to fully crush and refine bulk ore lumps into uniform coarse particles, effectively breaking ore symbiotic structures while avoiding excessive fine mud generation caused by repeated regrinding. The fully ground coarse ore slurry is continuously and stably discharged in one pass without classifier screening, directly forming standardized coarse grinding products suitable for downstream secondary processing. Through fixed optimized parameter matching of feeding volume, mill rotating speed and grinding medium ratio, the entire open-loop grinding system maintains stable operational status and consistent coarse particle fineness. Finally, uniform, low-fine-mud and process-compliant coarse mineral feed is steadily output, achieving simplified, high-efficiency and low-consumption open-circuit coarse grinding pretreatment for industrial mineral processing lines.
3. Core Features
Simplified Open-Circuit Structure & Low Failure Rate: Centrally optimized for primary coarse grinding demands, the open-circuit ball mill cancels redundant classifier and circulating return systems. It features compact layout, fewer auxiliary equipment and simple operational logic, completely eliminating complex circuit failures and parameter matching problems of closed-circuit grinding systems.
Stable Coarse Grinding Performance & Low Fine Mud Generation: The exclusive one-way coarse grinding mode and large medium grading scheme are tailored for bulk ore rough refinement. It effectively realizes uniform coarse particle sizing, avoids over-grinding and excessive fine mud waste caused by cyclic regrinding, and maintains stable and qualified coarse grinding indicators.
High Continuous Throughput & Simple Operation: Without circulating load restriction and classifier operating limitations, the open-circuit mill supports long-term continuous high-throughput operation. It requires no complex linkage parameter adjustment, greatly reducing operational difficulty and daily debugging workload, and improving overall production continuity.
Flexible Process Adaptability & Wide Application: The professional coarse grinding configuration adapts to various hard and soft ores for primary rough grinding pretreatment. It perfectly matches downstream fine grinding circuit feeding, pre-concentration and rough separation processes, with strong applicability for all kinds of medium and large-scale mineral processing lines.
Ultra-Low Comprehensive Operation Cost: The simplified structural design reduces equipment investment, site occupation and daily maintenance costs. Stable one-pass grinding operation lowers unit ore energy consumption and vulnerable parts wear, comprehensively improving the economic efficiency of primary coarse grinding procedures in mineral processing projects.
4.Technical Specification
| Model | Cylinder RPM (r/min) | Ball Load (t) | Feeding Size (mm) | Discharging Size (mm) | Capacity (t/h) | Motor Model | Power (kW) | Weight (t) |
| MQG600*1800 | 45.5 | 0.5 | ≤ 10 | 0.074-0.5 | 0.2-0.5 | Y160M-6 | 7.5 | 2.5 |
| MQG900*1800 | 38 | 1.8 | ≤ 20 | 0.074-0.6 | 0.8-2 | Y180L-6 | 15 | 5.8 |
| MQG900*3000 | 37.4 | 2.7 | ≤ 20 | 0.074-0.3 | 0.8-3 | Y200L2-6 | 22 | 7.5 |
| MQG1200*2400 | 32 | 4.8 | ≤ 25 | 0.074-0.6 | 1.5-4 | Y225M-6 | 30 | 9.8 |
| MQG1200*4500 | 30 | 5.2 | ≤ 25 | 0.074-0.6 | 1.5-6 | Y280S-6 | 45 | 13.2 |
| MQG1300*4000 | 36 | 5.8 | ≤ 25 | 0.074-0.6 | 2-6 | Y280S-8 | 45 | 14.8 |
| MQG1500*3500 | 28.8 | 8.3 | ≤ 25 | 0.074-0.6 | 3-6 | YR280M-8 | 90 | 17.6 |
| MQG1500*4500 | 28.8 | 10 | ≤ 25 | 0.074-0.4 | 4-8 | JR125-8 | 95 | 22.3 |
| MQG1500*5700 | 28.8 | 12 | ≤ 25 | 0.074-0.4 | 5-10 | JR126-8 | 110 | 26.7 |
| MQG1500*6400 | 28.8 | 13 | ≤ 25 | 0.074-0.4 | 8-12 | JR127-8 | 130 | 29.2 |
| MQG1830*3600 | 24.5 | 12 | ≤ 25 | 0.074-0.4 | 5-10 | JR127-8 | 130 | 31.4 |
| MQG1830*5400 | 24.5 | 15 | ≤ 25 | 0.074-0.4 | 5-20 | JR137-8 | 210 | 33.6 |
| MQG1830*6400 | 24.5 | 19 | ≤ 25 | 0.074-0.4 | 6-25 | JR137-8 | 210 | 36.5 |
| MQG1830*7000 | 24.5 | 20 | ≤ 25 | 0.074-0.4 | 8-30 | JR138-8 | 245 | 39.6 |
| MQG2100*3600 | 24.1 | 21 | ≤ 25 | 0.074-0.6 | 8-20 | YR355L1-8 | 210 | 43.2 |
| MQG2100*4500 | 24.57 | 26 | ≤ 25 | 0.074-0.6 | 8-35 | JR138-8 | 280 | 53.6 |
| MQG2200*3600 | 21.8 | 22 | ≤ 25 | 0.074-0.6 | 9-25 | JR138-8 | 245 | 47.8 |
| MQG2200*4500 | 21.4 | 27 | ≤ 25 | 0.074-0.6 | 10-30 | JR138-8 | 280 | 54.7 |
| MQG2200*7500 | 21.8 | 35 | ≤ 25 | 0.074-0.6 | 10-40 | JR158-8 | 380 | 68.4 |
| MQG2200*9000 | 21.4 | 36 | ≤ 25 | 0.074-0.6 | 10-45 | JR1510-8 | 475 | 76.5 |
| MQG2400*3600 | 21.26 | 26 | ≤ 25 | 0.074-0.6 | 10-40 | JR138-8 | 280 | 63.8 |
| MQG2400*7000 | 21.8 | 36 | ≤ 25 | 0.074-0.6 | 10-45 | JR1510-8 | 475 | 82.4 |
| MQG2400*8000 | 21.8 | 42 | ≤ 25 | 0.074-0.6 | 13-50 | JR630-8 | 560 | 85.7 |
| MQG2400*10000 | 21 | 65 | ≤ 25 | 0.074-0.6 | 15-60 | YR560-8 | 710 | 88.6 |
| MQG2600*8000 | 19.6 | 52 | ≤ 25 | 0.074-0.6 | 16-70 | JR1512-8 | 630 | 97.8 |
| MQG2700*3600 | 21.4 | 39 | ≤ 25 | 0.074-0.4 | 13-75 | JR158-8 | 380 | 86.8 |
| MQG2700*4500 | 21.4 | 43 | ≤ 25 | 0.074-0.4 | 13-90 | JR1510-8 | 475 | 91.8 |
| MQG3000*5400 | 19 | 58 | ≤ 25 | 0.074-0.6 | - | TDMK-30 | 630 | 119.7 |
| MQG3000*9000 | 18.3 | 78 | ≤ 25 | 0.074-0.4 | 20-90 | YR1000-8/1180 | 1000 | 152.4 |
| MQG3000*11000 | 18 | 100 | ≤ 25 | 0.074-0.6 | 30-90 | YR6306-8 | 1120 | 166.7 |
| MQG3200*3600 | 18.6 | 56.5 | ≤ 25 | 0.074-0.6 | 20-80 | YR6302-8 | 630 | 127.4 |
| MQG3200*4500 | 18.6 | 65 | ≤ 25 | 0.074-0.6 | 20-90 | YR6302-8 | 800 | 138.6 |
| MQG3200*5400 | 18 | 72 | ≤ 25 | 0.074-0.6 | 30-100 | YR1000-8 | 1000 | 146.7 |
| MQG3200*9000 | 18 | 85 | ≤ 25 | 0.074-0.6 | 30-100 | YR6302-8 | 1250 | 168.6 |
| MQG3600*4500 | 18 | 86 | ≤ 25 | 0.074-0.6 | 30-100 | YR6302-8 | 1250 | 158.7 |
| MQG3600*6000 | 18 | 117 | ≤ 25 | 0.074-0.6 | 45-180 | - | 14000 | 195.6 |
| MQG4000*6000 | 16.9 | 145 | ≤ 25 | 0.074-0.6 | 60-230 | - | 1800 | 221.7 |
| MQG4500*6000 | 15.6 | 180 | ≤ 25 | 0.074-0.6 | 80-300 | - | 2300 | 269.6 |
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