The production process of silicate cement is representative in cement production. It is made of limestone and clay as the main raw materials. It is crushed, compounded and ground to make raw materials, then fed into the cement kiln to calcine the mature materials, and then cooked. It is made by adding appropriate amount of gypsum (sometimes mixed with mixed materials or admixtures).
Cement production can be divided into dry method (including semi-dry method) and wet method (including semi-wet method) according to different preparation methods of raw materials.
Aluminate cement 1 is produced dry. The raw materials are simultaneously dried and ground, or dried and then ground into a raw material powder and then fed into a dry kiln to calcine the mature material. However, there is also a method in which the raw material powder is added into an appropriate amount of water to form a raw material ball, and is sent to the Lier kiln for calcining the mature material, which is called a semi-dry method, and is still a kind of dry production.
2 wet production. After the raw material is added with water powder to form a raw slurry, it is fed into a wet kiln to calcine the mature material. There is also a method of dehydrating the raw slurry prepared by the wet method, and preparing the raw material block into the kiln to calcine the mature material, which is called a semi-wet method, and is still a kind of wet production.
The main advantage of dry production is low heat consumption (such as dry heat of kiln clinker with preheater is 3140 ~ 3768 joule / kg), the disadvantage is that the raw material composition is not easy to be uniform, the workshop dust is large, and the power consumption is high. . Wet production has the advantages of simple operation, easy control of raw material composition, good product quality, convenient slurry transportation, less dust in the workshop, etc. The disadvantage is high heat consumption (clinker heat consumption is usually 5234~6490 joules/kg).
Drum brush is divided into long hair, medium hair, short hair three kinds, its performance is the length of the drum brush hair, rather than the thickness and length of the drum itself, brush hair is usually divided into wool and chemical fiber two kinds.
Different rollers will brush different effects, long hair rollers will brush out some fine texture, concave and convex feeling, similar to the texture effect. The paint surface after short wool roller besmear is more uniform, smooth, without concave and convex feeling, in the wool is between the two.
Roller brush is mostly made of wool and foam plastic, which can be divided into paint drum brush, hair drawing drum brush, floor paint drum brush, flat coating drum brush, etc., mainly used for large-area paint rolling in architectural decoration engineering. And can be used for coating and rolling all kinds of paint, such as: latex paint, anti-rust paint, internal and external wall paint, wallpaper glue, etc.
Note:
The use of drum brush as long as the straight brush can be wiped, if you want to daub evenly, the drum is best in the paint bucket to be fully absorbed, and then take out a few rolling on the inclined plane, press out the excess paint and then begin to brush the wall.
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