Description
Rotary kiln refers to rotary calcining kiln (commonly known as rotary kiln), belongs to cement building materials equipment, widely used in cement, metallurgy, building materials, chemical industry, environmental protection and other fields, with simple structure, high operation rate, convenient and reliable production process control, high quality of kiln products, less wearing parts. Rotary kilns are divided into variable diameter rotary kilns and through diameter rotary kilns according to their appearance, and can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to different materials. Cement kiln is mainly used for calcining cement clinker, divided into dry production of cement kiln and wet production of cement kiln two categories. Metallurgical and chemical kilns are mainly used for magnetization roasting of lean iron ore in iron and steel plants in metallurgical industry. Oxidation roasting of chromium and nickelite; Refractory plant calcined high alumina vanadite ore and aluminum plant calcined clinker and alumina hydroxide; Chemical plant roasting chromium ore and chromium ore powder and other minerals. Lime kiln (i.e. active lime kiln) is used for roasting active lime and light burned dolomite for iron and steel plants, ferroalloy plants, etc. Users can choose the appropriate type of equipment according to the actual material needs.
Performance Advantages
- 01, good sealingBoth ends of the rotary kiln are sealed with combined stainless steel scales to ensure the reliability of the seal and the air leakage coefficient is less than 10%.
- 02, kiln body control is flexibleThe kiln body is inclined to the level, the whole kiln body is supported by the supporting wheel device, and there is a stop wheel device that controls the kiln body moving up and down, and the user can control the kiln body flexibly
- 03, safe and reliable operationThe transmission part is provided with a main transmission device, and an auxiliary transmission device is also provided to ensure that the kiln body can still rotate slowly and prevent the kiln body from deformation when the main transmission power is interrupted
- 04, green environmental protectionThe rotary kiln basically does not make any noise during the working process, so its energy consumption is low.
Working Principle
The main structure of rotary kiln is composed of kiln head, kiln tail, cylinder, supporting device, motor and driving device. Among them, the supporting device is 3 groups of rollers, the kiln is provided with an expanding belt at the end, and the cylinder is lined by high aluminum brick and magnesia chrome brick.
The rotary kiln is a cylinder with a certain inclination, the inclination is 3 ~ 3.5%, and the rotation of the kiln promotes the mixing of materials in the rotary kiln, so that the materials mix with each other and react in contact. Coal injection combustion at kiln head generates a lot of heat, which is transmitted to the material by flame radiation, hot gas convection, kiln brick conduction, etc. The material moves forward in the kiln depending on the inclination of the kiln barrel and the rotation of the kiln.
More Pictures
Question&Answer
Q:Kiln body temperature is high how to do?
A:(1) Move the cooling fan to cool the high temperature area; (2) Adjust the air inside and outside the coal injection pipe to change the fire point, if the temperature of the cylinder is higher than 400℃ and there is a rising trend, stop the kiln to change the brick; (3) Ensure the decomposition rate of raw materials and reduce the pressure of the kiln head; (4) Increase the aluminum rate, increase the temperature of the firing zone, and lower the kiln speed and feeding amount; (5) Stop the kiln to repair bricks.
Q:How to solve the low temperature of kiln cylinder?
A:(1) kiln express; (2) Change the raw material rate into the kiln, increase the silicon value, and reduce the aluminum rate.
Technical Data:
| Model | Kiln body | Motor power(kw) | Gross weight(t) | Remark | ||||
| Diameter(m) | Length(m) | Slope(%) | Capacity(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 | Decomposing kiln 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 | Decomposing kiln 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 | |
| Φ3.6×70 | 3.6 | 70 | 3.5 | 1800 | 0.25-1.25 | 125 | 419 | |
| Φ4.0×56 | 4 | 56 | 4 | 2300 | 0.41-4.07 | 315 | 456 | |
| Φ4.0×60 | 4 | 60 | 3.5 | 2500 | 0.396-3.96 | 315 | 510 | |
| Φ4.2×60 | 4.2 | 60 | 4 | 2750 | 0.41-4.07 | 375 | 633 | |
| Φ4.3×60 | 4.3 | 60 | 3.5 | 3200 | 0.396-3.96 | 375 | 583 | |
| Φ4.5×66 | 4.5 | 66 | 3.5 | 4000 | 0.41-4.1 | 560 | 710.4 | |
| Φ4.7×74 | 4.7 | 74 | 4 | 4500 | 0.35-4 | 630 | 849 | |
| Φ4.8×74 | 4.8 | 74 | 4 | 5000 | 0.396-3.96 | 630 | 899 | |
| Φ5.0×74 | 5 | 74 | 4 | 6000 | 0.35-4 | 710 | 944 | |
| Φ5.6×87 | 5.6 | 87 | 4 | 8000 | Max4.23 | 800 | 1265 | |
| Φ6.0×95 | 6 | 95 | 4 | 10000 | Max5 | 950×2 | 1659 | |
