INTRODUCTION
Rotary kiln is a kind of thermal equipment calcines lump, bulk and slurry materials. It is widely used in cement & construction, non-ferrous metals, lime, ferrous metals, refractory materials, industrial chemicals, paper making industries etc.
Application of Rotary Kiln:
Rotary kiln refers to rotary calcining kiln ,mainly used for calcining calcium aluminate, limestone, bauxite, kaolin clay, gypsum etc.which is widely used in the fields of building materials, metallurgy, chemical industry, environmental protection, etc.
Types of Rotary Kiln:
Rotary Kiln belongs to building material equipment, according to different materials, which can be divided into the following types:
1. Cement Rotary Kiln: Cement Rotary Kiln is used for making cement clinker and there are dry and wet methods to make cement clinker.
2. Metallurgy chemical kiln: Metallurgy chemical kiln is widely used for magnetic roasting of poor iron ore and oxidizing roasting of chrome and nickel in the steel factory; backing high-alumina mine in the refractory material factory; baking chamotte and alumina in the aluminum factory and baking chrome ore and chrome powder in the chemical plant.
3. Lime Rotary Kiln: Lime Rotary Kiln is used for roasting active lime in steel works and ferroalloy plants and light roasting dolomite.
4. Kaolin Rotary Kiln: Kaolin rotary kiln is the main equipment for the kaolin calcination.
5. Zinc Oxide Rotary Kiln: Zinc oxide rotary kiln is the calcination equipment used for processing the zinc-bearing materials to get the zinc oxide.
6. LECA Rotary Kiln: LECA rotary kiln is the key equipment in the LECA production.
7. Magnesium Rotary Kiln: Magnesium rotary kiln is designed according to dolomite calcination characters and Pidgeon process requirement. That is the key equipment in the calciantion process.
8. Oil Proppant Kiln: Oil proppant kiln (Ceramic sand kiln) is the most ideal roasting equipment for oil proppant processing, and it is one of the most critical processes.
PROCESS
1. Support device: advanced shaft structure, automatic temperature measuring device and electrical heating.
2. Catch wheel: including two kinds of mechanical wheel and hydraulic pressure.
3. Gears: single or double. Control the rotating speed by variable motor, DE machine and frequency variable motor. Be reliable, energy saving and efficient.
4. Cylinder tyre 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, 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.