Introduction to Rotary Kiln System:

Rotary kiln calcining system produced by our company adopts internationally advanced hydraulic hatch wheel, high-precision plunger metering pump, high-precision low speed valve and contact mode graphite sealing device. To improve automatic degree, industrial television is set at kiln head for watching fire with analogical process flow fluorescent screen, and infrared scanner is adopted to reflect the calcining situation on computer directly. This new technology features strong visual, easy operation and reliable work. With stable heat engineering and high rotation rate, this kind of kiln has improved 10% rotation rate, 5%-10% capacity and lower 15% heat consumption, compared with other same model machine.

General Lists of Rotary Kiln Categories

Rotary kiln for active lime rotary kiln are reliable combined scale sealing. The air leakage coefficient is less than 10% using composite refractory material, to reduce radiation loss. The followings include cement rotary kiln, limestone rotary kiln, and clinker rotary kiln.

Cement rotary kiln is composed of cylinder, gears, support device, kiln liner and kiln tail sealing equipment, Green cement rotary kiln head hood and fuel device.

The limestone rotary kiln technical characteristics: limestone rotary kiln advanced structure, low loss of vertical preheater can effectively improve the preheating effect, after the preheat limestone kiln decomposing rate up to 20-25%, and can directly use the 10-15mm fine-grained limestone.

Clinker rotary kiln is mainly used for chemical clinker calcining, the production of chemical sub-dry and wet kilns produce two types ofchemical kiln. Rotary kiln is mainly used in chemical industry, metallurgy steel plant depleted iron ore magnetic roasting; chromium, nickel, iron ore roasting; refractory high alumina bauxite ore roasting plant and aluminum roasting clinker, aluminum hydroxide; chemical chromium ore roasting and chrome ore and other minerals.

Different Types of Circumgyrate Kiln:

In the mining production process, there are many types of rotary kilns. According to the firing methods of the kiln, it can be divided into direct fired rotary kiln and indirect fired rotary kiln; according to the processing methods, it can be divided into dry process rotary kiln,wet process rotary kiln and dry and wet types rotary kiln. In addition, Hongxing Machinery now has researched and developed acylinder rotary kiln which has a cylinder drum, thus improving the production capacity of the machine and reducing the energy consumption. And what is more, the clay rotary kiln now also has wide application range in the cement making, building materials and clay manufacturing industry.

Supplement Knowledge of Limestone Dryer

Material to be dried enters the limestone dryer and as the limestone dryer rotates, the material is lifted up by a series of internal fins lining the inner wall of the limestone dryer, when the material gets high enough to roll back off the fins, it falls back down to the bottom of the limestone dryer, passing through the hot gas stream as it falls.

This gas stream can either be moving toward the discharge end from the feed end (known as co-current flow) or toward the feed end from the discharge end (known as counter-current flow)
The gas stream can be made up of a mixture of air and combustion gases from a burner, in which case the limestone dryer is called a direct heated limestone dryer, alternatively, the gas stream may consist of air or another (sometimes inert) gas that is preheated, when the gas stream is preheated by some means where burner combustion gases do not enter the limestone dryer, the limestone dryer known as an indirect-heated type, often, indirect heated limestone dryers are used when product contamination is concern.

Cement Rotary Kiln

In cement production line, calcinating rotary kiln is mainly used for high-temperature fir the cement clinker. Therefore rotary kiln is the key equipment of cement production and known as the heart of the cement factory.

Cement rotary kiln calcining cement clinker removal, also used to calcined clay, limestone and slag drying; the production of refractory materials, using a limestone rotary kiln calcination of raw materials, make its dimensional stability, strength increase, and then molding processing.

A Rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process.

Rotary kiln is composed of cylinder, gears, support device, kiln liner and kiln tail sealing equipment, kiln head hood and combustion. Cylinder as heated pivoting part, made of high-quality carbon steel plate, is supported on the support device by type, and there is mechanical or hydraulic pressure catch wheel on the first or some gear in order to control the turning of cylinder. Gearing gyrate is according to process-required rotating speed by ring gear in the middle of cylinder. Because of the need of installation or maintenance, the bigger clinker rotary kiln has auxiliary gears, which makes cylinder gyrate more slowly. To prevent cold air come in and dust overflow, the reliable kiln tail and head sealing equipment is installed on feed and discharge end.

Rotary kiln is a kind of thermal Equipment, it is widely used in the fields of cement, Nonferrous Metallurgy, ferrous metallurgy, refractory material, chemical materials, paper making.

1. Supporting device apply rolling bearing ( few with sliding bearing) to simple the bearing structure to slow down the kiln power consumption and it also improve the maintenance and inspection conditions.

2. Catch wheel: including two kinds mechanical wheel and hydraulic pressure

3. Gears: single or double. Control the rotating speed by buncher, DE machine and frequency variable motor. Be reliable, energy-saving, and efficient.

4. Cylinder type bolster: lower bolster has three types: fixed, zoom and floating. The structure is simple, replacement is convenient and won’t hurt cylinder.

5. Sealing equipment: there are many kinds for choice according to kiln models, including air cylinder edge sealing, spring edge sealing, and graphite block sealing and combination for above. The feather is adaptive for cylinder rotating and swing. And sealing effect is very good.

6. Kiln head hood: including stationary type and flexible type.

7. Transmission device apply speed adjustable motor with big speed adjustable range, stable operation, easy to maintenance advantages. Our Rotary Kiln has slow disk kiln structure, which is composed by Diesel engine, gearbox etc. It could continue to operate when electric stops, its operation is very flexible and convenient and easy for the kiln maintenance and inspection.

Rotary kiln for active lime rotary kiln are reliable combined scale sealing. The air leakage coefficient is less than 10% using composite refractory material, to reduce radiation loss.

Cement rotary kiln is composed of cylinder, gears, support device, kiln liner and kiln tail sealing equipment, Green cement rotary kiln head hood and fuel device.

The limestone rotary kiln technical characteristics: limestone rotary kiln advanced structure, low loss of vertical preheater can effectively improve the preheating effect, after the preheat limestone kiln decomposing rate up to 20-25%, and can directly use the 10-15mm fine-grained limestone.

Clinker rotary kiln is mainly used for chemical clinker calcining, the production of chemical sub-dry and wet kilns produce two types of chemical kiln. Rotary kiln is mainly used in chemical industry, metallurgy steel plant depleted iron ore magnetic roasting; chromium, nickel, iron ore roasting; refractory high alumina bauxite ore roasting plant and aluminum roasting clinker, aluminum hydroxide; chemical chromium ore roasting and chrome ore and other minerals.