Grinding Equipment
Autogenous Mill
An autogenous mill uses the ore itself as grinding media. No steel balls are added. Ore chunks break by impact and attrition inside the rotating drum.
Technical parameters
It typically handles primary grinding after a primary crusher, or directly from run-of-mine. The mill discharge feeds a secondary ball mill for fine grinding. Hydrocyclones or screens close the circuit.
The table presents 15 autogenous mill models. The drum diameter and length increase across the range, giving progressively larger effective volumes. Main motor power rises with drum size. A plant engineer must match the required grinding volume and power draw to the ore characteristics and target throughput when choosing a model.
| Model | Drum Diameter (mm) | Drum Length (mm) | Effective Drum Volume ( m3 ) | Main Motor Power (kW) |
|---|---|---|---|---|
| ZM4000 | 4000 | 1600-3600 | 19-42 | 310-710 |
| ZM4500 | 4500 | 1800-4100 | 27-61 | 470-1100 |
| ZM5000 | 5000 | 2000-4500 | 38-83 | 700-1500 |
| ZM5500 | 5500 | 2200-5000 | 51-112 | 960-2200 |
| ZM6100 | 6100 | 2400-5500 | 69-152 | 1400-3100 |
| ZM6700 | 6700 | 2700-6000 | 93-201 | 2000-4300 |
| ZM7300 | 7300 | 2900-6600 | 120-264 | 2600-5900 |
| ZM8000 | 8000 | 3200-7200 | 160-347 | 3600-8100 |
| ZM8600 | 8600 | 3400-7700 | 197-429 | 4600-10000 |
| ZM9200 | 9200 | 3700-8300 | 246-530 | 5900-13000 |
| ZM9800 | 9800 | 3900-8800 | 296-640 | 7300-16000 |
| ZM10400 | 10400 | 4200-9400 | 359-770 | 9100-20000 |
| ZM11000 | 11000 | 4400-9900 | 422-909 | 11000-25000 |
| ZM11600 | 11600 | 4600-10400 | 492-1064 | 13000-30000 |
| ZM12200 | 12200 | 4900-11000 | 580-1246 | 16000-36000 |
Standard-model catalogue figures. Actual capacity, power draw and wear life shift with ore properties, feed gradation and circuit conditions. Use them to shortlist, then confirm the duty by testwork, flowsheet calculation and a written confirmation from the manufacturer.
What decides the selection
Before selecting an autogenous mill model, the buyer must determine the ore's grindability through standard tests such as the Bond work index or pilot-scale autogenous milling tests. The feed size distribution, target product P80, plant throughput, and ore competency are essential inputs. The mill diameter, length, and motor power are then sized accordingly.
- Bond work index or measured grinding energy
- Feed and product particle size
- Pulp density
- Throughput
- Number of grinding stages
- Liner and grinding media selection
- Specific energy consumption
- Closed-circuit classification arrangement
Other grinding machines
- Wet Grid Ball Mill39 models
- Wet Overflow Ball Mill51 models
- Wet Overflow Ball Mill (Hydrostatic Bearing)15 models
- Wet Rod Mill11 models
- Vertical Stirred Mill12 models
- Dry Ball Mill35 models
- Raymond Mill11 models
ISO 9001 / ISO 14001 / ISO 45001 / ISO 9712 / CE / CSA W47.1 / CNAS accredited laboratory
Send the duty, get a sized proposal
Tell us the ore, the throughput and the target product. Our process engineers come back with a flowsheet position, a model shortlist and the testwork we would need to confirm it.