Straight-through centrifugal mill is used for coarse powder grinding. It can grind the materials that the hardness is below Mohs' class 7. Innovative design, fineness adjustable, energy saving, environmental protection.
Input Size
30-40mm
Capacity
15-50T/H
Straight-through centrifugal mill is used for coarse powder grinding. It can grind the materials that the hardness is below Mohs' class 7. Innovative design, fineness adjustable, energy saving, environmental protection.
Coal powder plant
Barite Mill
Iron Ore Grinding Mill
Coal Gangue Mill
Limestone Calcium carbonate Gypsum Barite Calcite Dolomite
1.
Lower investment, energy saving.
2.
Save electricity and save cost: The equipment is energy-saving and the investment is small. The milling system is simple to install with small land space, and the civil engineering investment is also low.
3.
Long spare parts lifetime: adopting the principle of material layer rolling and grinding and high alloy wear-resistant materials, the life of the grinding media (roller and liner) reaches 1 to 2 years.
4.
Easy to maintain and more environmentally friendly: Routine maintenance only requires refueling at regular intervals, with fewer failures and high operating rates; low noise, no fan effect, and basically no dust.
Working Principle
The straight-through centrifugal mill adopts the principle of medium-speed and medium-pressure, continuous and repeated material bed laminating and grinding. Materials go from top to bottom. Grinding and classification are performed separately. The upper part of the machine drives the main shaft to rotate, so that the roller wheel rotates in the ring cone lining (the gap between the roller and the lining can be adjusted without contact) . The material is fed from the upper feed inlet and falls by its own weight. Due to the interaction between the upper pusher and the lower plugging, the material forms a material layer between the roller and the lining plate. The material layer is repeatedly rolled and rolled into powder by the roller, and finally discharged from the lower part of the mill.
Three core adjustment approaches are available: modifying main‑rotor speed, adjusting fan air volume and tuning built‑in classifier vane angle. Higher rotor speed strengthens hammer impact for finer powder; larger fan air volume speeds up material discharge for coarser product. Classifier vanes intercept coarse particles. Cooperate multiple parameters in commissioning to stably obtain target‑size powder.
Complete‑set hourly output ranges from 0.8 to 11 tons. Its capacity is heavily determined by material brittleness. Soft brittle materials deliver high throughput, while harder feed or finer target fineness brings obvious output drop. Nominal capacity is based on standard soft‑material test. Conduct capacity test with real raw materials in project preparation to avoid improper model selection.
It crushes by rotor hammer impact, so feed lump shall not be oversized. Allowable feed size: DC‑600 ≤5 mm, DC‑800/DC‑1000 ≤8 mm, DC‑1250 ≤12 mm. Direct feeding of big lumps increases hammer impact load, accelerates hammer wear and causes whole‑machine shaking and poor‑quality powder. Simple pre‑crushing equipment is recommended at upstream process.
Daily care includes checking bearing lube and temperature, cleaning or replacing screens, inspecting hammer and liner wear, and checking bolt tightness and rotor balance. As it rotates fast, watch vibration and noise; stock hammers, liners and screens ahead by log.
Main models are DC‑600, DC‑800, DC‑1000 and DC‑1250, numbers indicating rotor working diameter. Larger rotor delivers bigger crushing zone and higher capacity. Model selection focuses on material brittleness, target fineness and hourly output. This mill is highly sensitive to material hardness; hard feed leads to obvious capacity drop. Evaluate real‑feed condition instead of only nominal parameters.
Abnormal vibration often comes from uneven hammer wear causing rotor imbalance, loose bolts, tramp metal or bearing damage. Stop to check rotor balance and hammer symmetry, confirm no metal, and recheck bearing temperature. Contact the maker if it persists rather than running damaged.
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