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Nonmetallic mineral powder can be divided into phosphogypsum powder, desulphurization gypsum powder, citric acid gypsum powder and fluorine gypsum powder according to the different physical composition.
Gypsum powder according to the different color can be divided into: red gypsum powder, yellow gypsum powder, green gypsum powder, green gypsum powder, white stone paste powder, blue gypsum powder, colored gypsum powder.
Gypsum powder according to the different physical characteristics can be divided into: dolomitic gypsum powder, clayey gypsum powder, chlorite gypsum powder, alabaster powder, talc gypsum powder, containing arenaceous gypsum powder and fibrous gypsum powder.
Gypsum powder according to the use can be divided into: building materials with gypsum powder, chemical industry with gypsum powder, mold with gypsum powder, food with gypsum powder and casting with gypsum powder.
The application of gypsum has a long history, but in the early days, it was simply used to make chalk, make putty, make tofu and make simple handicrafts, etc., which lacked in-depth research and development, and thus did not attract people's attention.
In the late 1970s, especially since the implementation of the reform and opening up in China, with the rapid development of the economy, the demand for gypsum for buildings, building materials and other related industries that consume a large amount of gypsum has increased sharply. And gypsum has attracted more and more attention. Now, a huge emerging industry has been formed.
At present, gypsum powder production process and production line automation level is not high, most of the manual operation or semi-automation level.
The product quality of gypsum powder is in a state of low level and low quality for a long time.
Before phosphogypsum was formed, phosphate ore had been ground into ore powder greater than 80 mesh.
There is no obvious change in the shape and particle size of phosphogypsum after sulfuric acid substitution reaction, but phosphogypsum often contains a small amount of ungrated phosphate ore.
Also for a long time in the field often mixed with stones, coal, sand, mud, garbage and other lumps.
The problems are as follows: (1) these impurities stick to the wet phosphogypsum before drying and cannot be screened;
(2) if these impurities are not separated after drying, the quality of gypsum will be seriously affected if they are grinded into the gypsum;
(3) lumped phosphogypsum cannot guarantee the uniformity of calcination.
Therefore, a set of "flexible crushing device" is designed for drying, grinding, screening, forging and firing kiln. It can only crush lumps, but not other impurities.
After the forging and firing process is completed, the qualified gypsum of Paris will be separated by air to the next process, and all impurities will be separated out of the kiln for treatment.
In this way, the four processes of drying, crushing, forging and sieving are completed in a single step in the kiln.
At the same time, the temperature, time, air volume and other parameters of gypsum calcining in the kiln can be adjusted conveniently.
The gypsum after calcination was modified, homogenized and cooled into storage.
At present, GuiLin HangDa Mining Machinery Co.,LTD.mainly has: HD series Raymond mill, HDH series ring roller Raymond mill, HDW series micro-Raymond mill, HDX series ultra-fine Raymond mill, HDD series multi-stage Raymond mill and so on.
The Raymond mill consists of main engine, analytical machine, blower, cyclone separator, pipeline device and motor.
Stone powder processing equipment, stone powder mill adopts three-dimensional structure, covers a small area, complete set strong.
From the block to the finished powder independent into a production system.
And finished powder fineness uniform, through the sieve rate 99%, which is difficult to have other grinding equipment.
