Rotary Kiln Production Line

It`s mature for heavy-calcium ultrafine powder, grinding calcite to 800–2500 mesh for high-end fillers in plastics, coatings, paper and rubber. Its turbine classification keeps size narrow and brightness loss low, suiting continuous ultrafine mass prod

The LM Vertical Coal Grinding Mill has a hot-air system using a furnace or kiln waste heat to dry coal (feed moisture up to 10%–15%). It is explosion-proof by design: seal-air on rollers and separator, temperature and CO monitoring, controlled oxygen,

Vertical cylindrical shaft kiln receives feed from top and discharges lime at bottom. Three zones: preheating zone uses hot flue‑gas to preheat limestone; calcination zone supplies combustion heat for limestone decomposition into quicklime; cooling zone injects cold air to cool hot lime, and heated air flows upward as combustion‑supporting air. Material descends by calcination shrinkage plus bottom discharging. Roots blower supplies combustion air; induced‑draft fan keeps kiln‑top slight negative pressure at ‑10Pa. Flue gas gets purified before chimney discharge.

Twin‑shaft kiln consists of two interconnected vertical shafts (A & B), reversing‑valve assembly, burner gun groups, automatic feeding & discharging device, hydraulic switching unit, two‑stage dedusting (cyclone + bag filter) and DCS automatic control system. Connecting channel is arranged at bottom of calcination zone. Reversing valves periodically switch combustion‑shaft and regenerative‑shaft. Without heavy rotary‑kiln transmission components, it features high automation for medium‑large lime projects for calcining limestone, dolomite and magnesite.

Startup procedure: start two‑stage dedusting induced‑draft‑fan to build system negative‑pressure; activate hydraulic station and test reversing‑valve movement; run feeding‑discharging auxiliaries under no‑load; feed raw‑material and ignite strictly following kiln‑drying heating‑curve. Control heating‑rate carefully to protect refractory lining; fierce rapid heating is forbidden. After kiln‑drying, gradually increase feedstock and fuel input, tune reversing‑cycle and transit to full‑load condition. Monitor multi‑point temperature & pressure of both shafts all‑the‑time to avoid refractory thermal‑shock cracking.

The maker offers installation guidance, training, remote diagnosis and follow-ups, with liners and balls stocked for fast shipment. An annual maintenance agreement lets the maker track data and warn early, securing continuous stable operation.