Cement ball mill is a key piece of equipment in cement production equipment. It is mainly used to further crush materials after crushing in the cement production process. Its performance and use effect have an important impact on the efficiency and quality of cement production.
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A cement ball mill is the grinding unit that finishes cement: it grinds clinker together with gypsum and mixed materials such as slag, fly ash and limestone to 300-450 m2/kg. Baichy builds 15 models from Φ1.2x4.5 to Φ4.6x10+3.5, with a maximum feed size of 25 mm.
Cement grinding is the fourth and final stage of a cement line. Limestone and clay are crushed in a jaw crusher, proportioned and ground into raw meal; coal is ground into pulverised coal for the kiln; the raw meal is calcined in a rotary kiln into clinker; and the clinker is ground in the cement ball mill with gypsum and mixed materials before packing and dispatch. Because it is the last stage, the mill sets the plant's final product quality — fineness here is what decides the cement grade.
Cement production line site
Cement grinding equipment
Ball mill lining
Ball mill reducer
A cement ball mill grinds every material in the cement and concrete chain: clinker, granulated blast furnace slag, gypsum, limestone, fly ash and volcanic ash. The same mill also handles ceramic raw materials, non-metallic minerals, coal and ore dressing tailings, with the target fineness set by the end use rather than by the machine.
Ultra-fine products at 400-2500 mesh are not simply a matter of grinding longer: they need a classifier in the circuit to pull the fine fraction out of the mill.
Match the model on three numbers first — target fineness, required output and maximum feed size — then confirm the circuit, the grinding media charge and the site conditions.
Fineness decides which duty you are buying. Ordinary cement to P·C32.5 or P·O42.5 needs 300-450 m2/kg. Slag micro powder for use as a cement admixture needs 420 m2/kg or finer. Limestone filler is much coarser, at 80-200 mesh (0.075-0.2 mm). If you need 400-2500 mesh, the mill alone is not the answer — plan for classification equipment as well.
Please refer to the parameter table below.. Adjacent models overlap, so select by the middle of your production range, not by the top of it.
• The use of scientifically graded grinding bodies and closed-circuit grinding technology improves grinding efficiency by 20-30%;
• Innovative energy-saving design (frequency conversion drive + high-efficiency lining) reduces power consumption by 15-30%, and the power consumption per ton of cement is ≤ 30 kWh.
• It can handle a variety of materials such as cement clinker, slag, fly ash, etc..
• By adjusting the powder selector and grinding body, the fineness of the finished product can be accurately controlled at 300-500m²/kg.
• Heavy-duty bearings + gear transmission ensure smooth operation, low failure rate, and operation rate ≥95%;
• Modular quick-disassembly design makes the replacement of wearing parts more efficient and minimizes downtime.
• Equipped with a high-efficiency dust removal system, dust emission ≤30mg/m³, which is better than the national standard;
• Optional intelligent control system, real-time monitoring of key parameters, and support for unmanned operation.
Limestone is more commonly used in the cement preparation process, but the mined limestone generally has larger particle sizes and needs to be crushed. Generally speaking, processing limestone into cement requires the preparation and homogenization of raw materials, the preparation of pulverized coal, the calcination of clinker, and the grinding of cement. stage.
1. Preparation and homogenization of raw meal: natural limestone, clay, and exotic raw materials are crushed by a jaw crusher and mixed in a certain proportion, and then ground by a ball mill to prepare raw meal with appropriate composition and uniform quality;
2. Pulverized coal preparation: The coal required for calcining cement raw materials must be prepared into pulverized coal to provide the particle size required for pulverized coal combustion to facilitate full combustion and obtain sufficient combustion reaction capacity. In this process, pulverized coal can be directly added, and equipment such as jaw crushers and ball mills will be used for processing.
3. Clinker calcination: Put the lime raw material in the rotary kiln and calcine it until it is partially melted to obtain lime clinker.
4. Cement grinding: that is, adding an appropriate amount of gypsum, mixed materials or additives to the clinker to grind it into cement, and then package it for shipment.
| Model | Capacity (t/h) |
Rotate Speed (r/min) |
Grinding Balls (t) |
Power (kw) | Gear Box | |
|---|---|---|---|---|---|---|
| Model | Speed Ratio | |||||
| Φ1.2x4.5 | 1.6-5.8 | 30.3 | 5 | 55 | ZD30 | 4.5 |
| Φ1.5x5.7 | 3.5-6 | 26.34 | 11 | 130 | ZD40 | 4 |
| Φ1.83x6.4 | 6.5-15 | 23.9 | 21 | 210 | ZD60 | 4.5 |
| Φ1.83x7 | 7.5-17 | 24.5 | 23 | 245 | ZD60 | 4.5 |
| Φ2.2x6.5 | 14-20 | 21.4 | 31 | 280 | ZD70 | 5 |
| Φ2.4x7 | 17-28 | 20.4 | 39 | 380 | ZD80 | 5 |
| Φ2.4x8 | 20-35 | 20.3 | 42 | 570 | ZD80 | 5 |
| Φ2.4x12 | 35-45 | 20 | 63 | 800 | MBY710 | 6.3 |
| Φ2.4x13 | 35-48 | 19.4 | 68 | 800 | MBY710 | 6.3 |
| Φ2.6x13 | 40-55 | 19.5 | 82 | 1000 | JDX800 | 6.3 |
| Φ3x9 | 50-55 | 18.34 | 78 | 1000 | JDX800 | 6.3 |
| Φ3.2x9 | 60-70 | 17.6 | 95 | 1250 | MBY900 | 7.1 |
| Φ3.5x11 | 75-85 | 16.8 | 150 | 1250 | JDX900 | 5.84 |
| Φ3.8x12 | 85-110 | 17 | 175 | 1600 | MBY800 | 5.6 |
| Φ4.6x10+3.5 | 180-210 | 15 | 278 | 3550 | JQS3500 | 15.1 |
A cement ball mill grinds with steel balls tumbling in a rotating cylinder; a vertical roller mill grinds between rollers and a rotating table. Ball mills take feed up to 25 mm and reach 300-450 m2/kg, handling hard, abrasive clinker and slag — the usual choice for composite cement and smaller plants. Vertical mills dry, grind and classify in one unit, suiting higher-moisture raw meal and slag. Choose on abrasiveness, moisture, layout and power cost.
Four measures give the largest saving. Optimise media grading to match the actual feed (for example Φ60 + Φ40 + Φ20 mm). Convert to closed-circuit with a high-efficiency classifier such as O-Sepa, holding circulating load at 100%-150%. Add variable-frequency speed regulation so cylinder speed follows the material. Keep the liner and bearing lubrication on schedule.
Three faults cause most stops. Output drop: steel ball loss, a blocked partition plate, or feed moisture too high — top up balls, clear the plate, control moisture. Bearing above 70 ℃: low oil, a faulty cooling system, or a damaged bearing — check oil level, clear the circuit, inspect the bearing. Vibration or noise: loose anchor bolts, poor gear meshing, or cylinder deformation — re-torque the bolts, check the girth gear and cylinder runout.
Start with the material: high-chromium alloy wears best, then low-chromium cast iron and forged steel. Then grade by chamber. Coarse chamber: Φ60-100 mm balls at 40%-50% of the charge. Fine chamber: Φ20-40 mm balls at 60%-70%. Replenish every 500-800 operating hours. A charge that drifts too coarse or too fine is the usual cause of falling output and rising specific power.
Service life depends on the part. Cylinder shell: 15-20 years, provided the liner is replaced on schedule. Liner: 1-3 years, longer with high-chromium. Girth gear: 8-10 years with regular lubrication and alignment checks. Wear parts — liner, media and gear lubrication — drive maintenance cost, not the shell.
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