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Rotary Kiln

Simple operation, reliable operation, good quality of finished products, high output, energy conservation and environmental protection, high energy and low consumption

Product Introduction

Rotary kiln, commonly known as rotary kiln, belongs to the category of building materials equipment. Rotary kilns are widely used in building materials, mineral processing, chemical industry, cement production, and environmental protection and energy saving industries. They are necessary equipment for material calcination and molding.

Classification of rotary kilns

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 kilns are mainly used for magnetization roasting of lean iron ore in iron and steel plants in the metallurgical industry; oxidative roasting of chromium and nickel iron ore; roasting high alumina vanadium ore in refractory plants and clinker and aluminum hydroxide in aluminum plants; roasting chromium ore in chemical plants and chrome ore powder and other minerals. Lime kiln (ie active lime kiln) is used for roasting active lime and light-burning dolomite used in iron and steel plants and ferroalloy plants.

Rotary kiln structure

  1. Kiln head part

  2. The kiln head is the discharge part of the rotary kiln, the diameter is larger than the diameter of the rotary kiln, and it is sealed by the stainless steel fish scales and the kiln body.

  3. Kiln body part

  4. It is the main body of the rotary kiln (rotary kiln), usually 30~150 meters long, cylindrical, with 3~5 rolling rings in the middle. Most of the cylinders are processed by factories into 3~10 sections, which are transported by large trucks to the destination and welded. The rolling ring part, also commonly known as (the tire ring), is cast from molten steel, and the rolling ring part of the kiln body is slightly thicker than other parts of the kiln body due to its load-bearing. The supporting tug is also a part of the kiln body and the rolling ring is connected to the foundation correspondingly, and is the load-bearing pillar of the entire rotary kiln. Usually a set of idlers consists of two idlers and two stop wheels. The rotary kiln should be covered with refractory bricks during normal operation.

  5. Kiln tail part

  6. The kiln tail part is also an important part of the rotary kiln. The shape of the feed end is similar to the cover of a rotary kiln, and it is mainly responsible for feeding and sealing.

  7. Rotary kiln support frame

    • The support frame of the rotary kiln can make our rotary kiln equipment more solid, so that it will not shake when working and stabilize production;

    • The support frame of the rotary kiln is mainly to fix our rotary kiln equipment, which can prevent our rotary kiln equipment from deforming when it is used. Everyone knows that the rotary kiln equipment will be out of shape if it is not operated properly, so it has such a role. ;

    • The rotary kiln support can facilitate the hoisting of our rotary kiln equipment, etc., and facilitate transportation.

  8. Preheat tower

  9. Also called preheater, it is a device that preliminarily heats the material by the waste heat of the exhaust gas discharged from the rotary kiln before the material enters the rotary kiln, and it is mostly vertical structure. The principle is to pass the waste heat discharged from the kiln tail of the rotary kiln through the preheating tower filled with raw materials to realize the raw material heating process. In addition, the preheating tower can effectively reduce energy consumption and improve the quality of finished products.

  10. Cooler

  11. On the contrary, the cooler and the preheater are devices that rapidly cool down the material of the rotary kiln after firing. It looks like a small rotary kiln, but the diameter is smaller and shorter, and there is no need to lay refractory bricks, and the inside is replaced by a lifting plate. The main function is to rapidly cool the finished product.

  12. conveyor

  13. The conveyor belt is the material conveying device of the rotary kiln. During use, various forms of damage often occur, such as: edge delamination, festering, defects and cracks; long-distance longitudinal tearing, deep scratches, holes, and large-area wear , Covering the rubber drum bag or peeling, internal defects of the joint, etc.

The working principle of rotary kiln

The raw meal is fed from the cold end of the rotary kiln. Since the rotary kiln has a certain inclination and rotates continuously, the raw meal continuously moves to the hot end. The fuel is injected from the hot end, and it burns and releases heat under the support of air to generate high-temperature flue gas. The hot gas flows from the hot end to the secondary end under the drive of the fan, and the material and the flue gas exchange heat in the process of reverse movement. Burn the raw material to the mature material.