Lime Kiln
Lime rotary kilns offer multiple advantages in processing limestone. Also known as lime kilns, they are robust calcination systems distinguished by high production capacity, quiet operation, and low overall energy consumption. As a primary processing equipment for lime production, they deliver substantial industrial value, driving strong market demand and making them the preferred choice for most users in limestone processing.
Applications:
mainly apply for lime production line.
Capacity: 150-1000t/d
Lime Kiln For Sale
Performance Advantages
the main drive system adopts a new type of AC frequency conversion speed regulation technology. Compared with traditional electromagnetic speed regulation and DC speed regulation, it is more energy-saving and environmental protection and has a wide range of speed regulation, high efficiency, and high-speed regulation precision, and stable operation.
After welding the base of the supporting device of the supporting wheel and the retaining wheel, and eliminating the welding stress through vibration aging treatment, integrated processing and manufacturing can be carried out by using a large vertical lathe and boring and milling machine, which can guarantee the machining accuracy and shape and position tolerance requirements of each part and significantly improve the installation accuracy and reliability of the whole machine.
According to the characteristics of limestone and its’ calcination process requirements, the overall structure optimization design was carried out for kiln head and end sections, which solved the problems of return materials of kiln tail and dust leakage commonly existed in common rotary kilns, making the transportation more smooth and natural.
The limestone is uniform in heat, stable in product quality, low in over-burnt rate, especially suitable for calcination of high activity lime for steelmaking.
vertical preheater can be configured at the end of the kiln to make full use of the high-temperature flue gas calcined in the lime rotary kiln, preheat the limestone from normal temperature to the initial decomposition state, improve the product activity, and facilitate transportation and storage.
Working Principle
Limestone is fed into the kiln through the chute at the end of the kiln. Due to the tilt and slow rotation of the kiln body, the limestone rolls along the circumference on one side and moves from the end of the kiln to the kiln head on the other side along the axis. The fuel is sprayed into the kiln from the end of the kiln through the burner for combustion, and the heat is transmitted to the limestone by radiation, convection and conduction. After the limestone is calcined into quicklime during the moving process, it is discharged from the end of the kiln, and the high-temperature flue gas enters the dust removal system from the end of the kiln.
Specifications
Hot Sale: patented technology, high productivity, environmental protection and energy saving
FAQ
What materials can lime rotary kiln process and its application scenarios?
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.
What information shall I provide for accurate lime rotary kiln production‑line quotation?
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.
What fuel types are available for lime rotary kiln?
Lime rotary kiln is compatible with pulverized coal and various gas fuels. Corresponding burner shall be selected to adjust flame profile and keep calcining‑zone temperature around 1350℃. Pulverized coal needs coal‑preparation & conveying equipment; gas fuel requires pressure‑regulating supply system. Confirm fuel calorific value and sulfur content during selection. Fuel composition influences heat consumption, product quality and downstream flue‑gas treatment solution.
What does heat‑rate index mean for lime rotary kiln and its influencing factors?
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.
What downstream industries apply active lime produced by rotary lime kiln?
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.
What is calcination working principle of lime rotary kiln?
Limestone is fed through kiln‑tail chute. Inclined and slowly‑rotating kiln shell makes limestone tumble circumferentially and travel axially from kiln tail toward kiln head. Fuel is injected via kiln‑head burner. Heat transfers to limestone through radiation, convection and conduction. Limestone decomposes into quicklime and discharges to cooler. High‑temperature flue gas flows backward to preheater for raw‑material preheating before entering dust‑removal system.
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