Cement rotary kiln which is horizontally installed and that is able to rotate and vertical mill and that is vertically installed and that can not rotate. In the development process, there are many types of rotary calciner kilns with different production methods and different specifications in the cement industry. As the heat exchange devices inside the kiln, the kiln can also be devided into many different types. According to the methods of raw material making, the production process can be devided into dry type production and wet tyoe production, and the cement kilns relatively to the production process can be devided into dry and wet types rotary kiln. Cement kilns are mainly devided into the following types:
1. Dry type rotary kiln
The advantages and disadvantages of dry type rotary klin and wet type rotary kiln are opposite. The dry type production is to make the raw materials to dry powders and the water conent is generally lower than 1 percentage, for this reason, it can reduce the heat needed for voparizing the water compared with wet type production. The hollow type circumgyrate kiln has hugh heat consumption as the tempearture of the water gas is high. As the dry type production is to make the raw materials into dry powder whose flowability is weaker than that of slurry pulp, for this reason, the mixing of the raw material is weak and the components are not even.
2. Wet type rotary kiln
The rotary cement kiln used in wet production process is called wet type rotary kiln and wet type production is to make the raw materials to material pulp with the water content of 32-40 percentage. As the material plup has flowablilty, the mixing of different types of raw material is good, and the components of raw materials are even so that the quality of the calcined clinker is higher, which are the main advantages of wet type production.
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