Product Introduction: Cement rotary kiln is a type of rotary kiln commonly used for the production and calcination of cement clinker. Currently, the cement rotary kiln produced by our company is mainly a dry process production line equipment for cement clinker. According to different cement clinker production processes, this product is divided into hollow dry process kiln, kiln with preheater, and external decomposition kiln. There are sixteen models with cylinder diameters between 2.5m and 4.3 meters, which can meet the daily production range of 180-3200 tons of dry process clinker calcination.
1.Product stability:
It can evenly heat the material during calcination, ensuring stable product quality
2.Transmission:
The main transmission system utilizes advanced AC variable frequency speed control technology, offering energy efficiency, environmental friendliness, wide speed regulation range, high efficiency, precise speed control, and stable operation.
3.Supporting roller device:
The base welding of both the single supporting roller device and the thrust roller device has been completed. After vibration stress relief treatment to eliminate welding stresses, the installation accuracy and reliability of the entire machine can be improved.
4.Structural optimization:
The kiln head and tail sections have undergone comprehensive structural redesign, effectively resolving common issues of return material at the kiln end and dust leakage, thereby ensuring smoother and more natural material conveying.
Working Principle
Material is fed into the kiln from the kiln tail (higher end). Due to the inclination and slow rotation of the cylinder, the material moves forward gradually while rolling axially and radially. Fuel is injected into the kiln through the burner at the kiln head (lower end) for combustion. Heat is transferred to the material through radiation and conduction. During its movement, the material forms a liquid phase, generating minerals such as tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite. After completing the sintering process, clinker is formed and discharged from the kiln head.
Lime rotary kiln complete set includes kiln shell, supporting‑retaining wheel device, AC frequency‑conversion main drive, kiln head & kiln‑tail seal, vertical preheater, vertical cooler, burner combustion system and flue‑gas dust‑removal system. Support base eliminates welding stress via vibration aging before integrated machining for high installation accuracy. Inclined rotating shell conveys and calcines materials for active lime and calcined dolomite in lime production lines.
Please provide target daily capacity, limestone lab report (CaO, MgO, SiO₂, sulfur impurity), lump‑size range of feed limestone, available fuel type & calorific value, plant site dimension & elevation, local power‑supply parameter, target lime activity index, and scope of supply including preheater, cooler and dust collector. Also clarify demands for general‑layout drawing and on‑site commissioning. Complete data supports correct kiln sizing and full process proposal.
Heat rate (kJ/kg‑CaO) means heat consumption for producing each kilogram of CaO. Our kiln series reaches 4810‑5300 kJ/kg‑CaO. High raw‑material impurity, poor preheater performance, serious air‑leakage and insufficient cooler heat‑recovery will increase heat consumption. Large‑capacity models with polygonal preheater deliver lower heat rate. Good sealing and regular maintenance for preheater & cooler help control heat‑rate and cut fuel operating cost.
New AC frequency‑conversion main drive saves more energy than old electromagnetic or DC speed‑regulation solutions. It features wide speed‑adjusting range, high regulating precision and stable running. Kiln shell rotating speed can be flexibly adjusted to change material residence time, control under‑burning and over‑burning conditions. Frequency‑conversion drive reduces startup impact on riding rings and girth gear, lowers abrasion and maintenance work as standard upgrade for modern lime kilns.
High‑activity lime from rotary kiln is widely used for steel‑making desulfurization & slag‑forming, metallurgy, chemical industry, waste‑water treatment and building‑material sectors. High‑activity lime features fast reaction and lowers unit consumption compared with ordinary lime. Uniform calcination brings low over‑burning rate for stable activity. Calcined dolomite serves refractory‑material industry. Target product index shall be confirmed in design phase to meet downstream requirements.
Lime rotary kiln mainly calcines limestone for active quicklime and processes dolomite for calcined dolomite. Low over‑burning rate guarantees stable‑quality active lime specially for steel‑making industry. It serves full lime production lines with standard capacity 150‑1000 t/d and good adaptability for lump raw materials. Please provide raw‑material chemical composition, lump size and target lime activity index for proper process configuration.
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