1. Rotary kiln types

Rotary kiln refers to a rotating calcining kiln, which belongs to the category of building materials equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to different materials processed. Cement kilns are mainly used for calcining cement clinker and are divided into two categories: dry production cement kilns and wet production cement kilns. The metallurgical chemical kiln is mainly used in the metallurgical industry for the magnetization and roasting of lean iron ore in steel plants; the oxidation roasting of chromium and nickel iron ore; the roasting of high-alumina vanadium ore in refractory materials plants; the roasting of clinker and aluminum hydroxide in aluminum plants; the roasting of chromium ore in chemical plants. and chromium ore powder and other similar minerals. Lime kiln is used to bake activated lime and light-burned dolomite used in steel plants and ferroalloy plants.

2. Application industries:

Rotary kiln In many production industries such as building materials, metallurgy, chemical industry, and environmental protection, rotary cylinder equipment is widely used to mechanically, physically or chemically treat solid materials. This type of equipment is called a rotary kiln. Among the fields of application of rotary kilns, the largest number are found in the cement industry.

3. Rotary kiln effect

In the building materials industry, in addition to calcining cement clinker, rotary kilns are also used to calcine clay, limestone and slag drying. In the production of refractory materials, rotary kilns are used to calcine raw materials to stabilize their dimensions and increase their strength. , and then processed into shape.

During the mineral processing process, a rotary kiln is used to magnetize and roast the lean iron ore, so that the original weak magnetism of the ore is changed into a strong magnetism to facilitate magnetic separation.

In the chemical industry, rotary kilns are used to produce soda, calcine phosphate fertilizer, barium sulfide, etc. 

The entire cement production process can be summarized as "two grinding and one burning", in which "one burning" is the process of burning the raw materials prepared after grinding into clinker under the high temperature of the rotary kiln. Therefore, the rotary kiln is the main engine in cement production, commonly known as the "heart" of the cement factory.