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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.
| 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 |
The rotary kiln rotates and tilts the cylinder to complete the physical or chemical reaction of the material at high temperature. The process diagram is shown below:
Material feeding: the material enters the cylinder from the kiln tail (high end).
Material movement: Due to the rotation and tilting of the cylinder, the material gradually moves towards the kiln head (low end).
High-temperature treatment: During the moving process, the materials go through the stages of preheating, calcining and cooling to complete the chemical reaction or physical change.
Finished product discharge: The treated material is discharged from the kiln head.
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.
According to the use and process characteristics, rotary kiln can be divided into the following categories:
Cement rotary kiln: used for the production of cement clinker.
Lime rotary kiln: used for calcination of limestone.
Metallurgical rotary kiln: used for roasting and reduction of metal ores.
Chemical rotary kiln: used for the treatment of chemical raw materials, such as alumina, titanium dioxide and so on.
Environmental protection rotary kiln: used for the treatment of hazardous waste, sludge, etc.
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.
Chunlei Machinery has been engaged in mining machinery manufacturing for more than 30 years, with a wealth of experience in building websites and customer cases, served customers all over the world!
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请输入标题United States
“The installation and commissioning process was seamless, and the technical support team was very professional. Our rotary kiln has been running flawlessly for over a year now.”
United Kingdom
“The environmental performance of the rotary kiln is impressive. After switching to this rotary kiln, we increased our production capacity by 20%. It has revolutionized our business. It has helped us meet stringent emission standards while maintaining high productivity.”
Kenya
“This rotary kiln is perfect for our cement production line. It handles high temperatures effortlessly and delivers consistent results every time.It has exceeded our expectations in terms of performance and reliability.”
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