Rotary kiln

What is Rotary kiln?

Rotary kiln is a kind of rotary calcining kiln, which belongs to the category of building materials equipment. It is a steel thin-walled cylinder with a certain slope (usually 1%-6%) installed on the supporting device. Rotary kiln can be divided into cement kiln, metallurgical chemical kiln and lime kiln according to different materials.

Cement kilns are mainly used for calcining cement clinker, and are divided into two categories: dry production cement kilns and wet production cement kilns. Metallurgical chemical kiln is mainly used for metallurgical industry iron and steel plant poor iron ore magnetization roasting; chromium, nickel iron ore oxidation roasting; refractory factory roasting high aluminum vanadium ore and aluminum plant roasting clinker, aluminum hydroxide; chemical plant roasting chrome ore sand and chrome ore powder and other types of minerals.

Lime kiln (i.e. active lime kiln) is used for roasting active lime and lightly burned dolomite used in iron and steel plants and ferroalloy plants.

If you are a beginner and do not know about Rotary kiln, tell us your raw material characteristics, finished product requirements, site conditions, production budget, hourly production, and other requirements, we have professional engineers to equip you with a suitable model at a reasonable price. Next, let’s see the types of Rotary kiln we can supply.

What Is Rotary kiln Used For?

Building materials industry: it is the key equipment in cement production, used for calcining cement raw material. It can also calcine lime and remove water and impurities. It can also forge clay, limestone and carry out slag drying and so on.

Metallurgical industry: It is used in the smelting process of aluminum, iron, nickel and other metals. For example, in the sintering and smelting of bauxite, the rotary kiln heats the bauxite to a high temperature so that it undergoes a chemical reaction to extract alumina, which in turn produces aluminum metal through electrolysis and other processes; for nickel ores, the rotary kiln can be dried, preheated, and reduced to extract nickel metal.

Chemical industry: It is used for the preparation of fertilizers, alumina and other chemicals, and is also widely used in various chemical reactions. For example, catalyst burning in petroleum refining process, pyrolysis and incineration process in solid waste treatment.

Environmental protection field: can be used to deal with waste plastics, waste rubber, waste oil, waste minerals and other wastes. Under high temperature conditions, these wastes can undergo pyrolysis, cracking or oxidizing reactions, and be transformed into useful products, such as fuel oil, gas, etc., or into safe and harmless substances to reduce the pollution of the environment. For some hazardous wastes, such as medical wastes and chemical wastes, they are converted into energy or harmless substances.

Rotary kiln ordered by Customer

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Technical Parameters of Rotary kiln

Product specification （m）	Kiln body size					Motor power （kw）	Gross weight （t）	Remark
	Diameter（m）	Length（m）	Slope（%）	Output （t/d）	Rotational speed（r/min）
Φ2.5×40	2.5	40	3.5	180	0.44-2.44	55	149.61
Φ2.5×50	2.5	50	3	200	0.62-1.86	55	187.37
Φ2.5×54	2.5	54	3.5	280	0.48-1.45	55	196.29	Decomposingkiln outside kiln
Φ2.7×42	2.7	42	3.5	320	0.10-1.52	55	198.5	——
Φ2.8×44	2.8	44	3.5	450	0.437-2.18	55	201.58	Decomposingkiln outside kiln
Φ3.0×45	3	45	3.5	500	0.5-2.47	75	201.94	——
Φ3.0×48	3	48	3.5	700	0.6-3.48	100	237	Decomposing kiln outside kiln
Φ3.0×60	3	60	3.5	800	0.3-2	100	310	——
Φ3.2×50	3.5	50	4	1000	0.6-3	125	278	Decomposing kiln outside kiln
Φ3.3×52	3.3	52	3.5	1300	0.266-2.66	125	283	Preheating calciner
Φ3.5×54	3.5	54	3.5	1500	0.55-3.4	220	363	Preheatingcalciner
Φ3.6×70	3.6	70	3.5	1800	0.25-1.25	125	419	Preheatingpower kiln
Φ4.0×56	4	56	4	2300	0.41-4.07	315	456	Preheatingcalciner
Φ4.0×60	4	60	3.5	2500	0.396-3.96	315	510	Preheatingcalciner
Φ4.2×60	4.2	60	4	2750	0.41-4.07	375	633	Preheatingcalciner
Φ4.3×60	4.3	60	3.5	3200	0.396-3.96	375	583	Preheatingcalciner
Φ4.5×66	4.5	66	3.5	4000	0.41-4.1	560	710.4	Preheatingcalciner
Φ4.7×74	4.7	74	4	4500	0.35-4	630	849	Preheating calciner
Φ4.8×74	4.8	74	4	5000	0.396-3.96	630	899	Preheatingcalciner
Φ5.0×74	5	74	4	6000	0.35-4	710	944	Preheatingcalciner
Φ5.6×87	5.6	87	4	8000	Max4.23	800	1265	Preheatingcalciner
Φ6.0×95	6	95	4	10000	Max5	950×2	1659	Preheating calciner

Working Principle of Rotary kiln

The working principle of rotary kiln mainly involves the movement of materials in the kiln, the flow of gas in the kiln, fuel combustion and heat transfer between materials and gas and other phenomena and laws. The raw material enters the cylinder from the kiln tail cylinder at high temperature into the cylinder for calcination. Due to the kiln body’s tilt and slow rotation, the material produces a composite movement that both tumbles along the circumference and moves from high to low along the axial direction. Fuel is injected from the kiln head and burned in the kiln, and the heat emitted heats the raw material, making it calcined into clinker. The hot air formed in the process of heat exchange with the material enters the kiln end system from the kiln feed end, and is then discharged into the atmosphere by the chimney.

Advantageous features of Rotary kiln

• Strong processing capacity: the rotary kiln can run continuously with very high output, which is suitable for large-scale production line.
• Stable product quality: the materials are constantly tumbling and moving in the rotary kiln, and are heated evenly, which can ensure the quality and stability of the products.
• High resource utilization: the rotary kiln can be applied to the calcination and treatment of a variety of materials, and can directly calcine 10~50mm fine-grained limestone, which cannot be utilized by other kilns.
• Energy saving and environmental protection: the rotary kiln is equipped with vertical preheater at the kiln end, and the flue gas discharged from the vertical preheater at the kiln end has low temperature and low dust content, which is conducive to environmental protection.
• Reduce fuel consumption: the vertical cooler at the kiln head not only can make the high temperature lime cold, improve the product activity, but also easy to transport and storage.
• Convenient operation and maintenance: the improvement of automation makes it possible for the operator to monitor and adjust the operation status of the rotary kiln in real time through the control system, which reduces the labor intensity.

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Rotary kiln price

As for the price, we can’t show you the exact price because we deal with customers from all over the world and there are many factors affecting the price. If you want to know the price of Rotary kiln, you can leave a message to us on this page, we have professional sales staff and engineers to explain to you.

As one of the old brand mining machinery manufacturers in Henan, Chunlei Machinery strictly controls every Rotary kiln for sale with more reliable quality. Chunlei has its own R&D team and production site, and sells directly, enjoying factory super low price. What are you waiting for? Contact us immediately!