The factors affecting the dry powder function and drying power are as follows:

1. slurry function, concentration and slurry feeding speed.

When the water content of the slurry is too high, the fuel consumption is large and uneconomical; When the water content of the slurry is too low, the slurry is not easy to atomize. For the slurry containing 50% clay, the water content is generally 35%-50%. In addition, the spray dryer process requires the use of high fluidity and non thixotropic slurry. Therefore, mud thinners suitable for the original properties can be used to solve the problem of mud function.

2. operating gas temperature and exhaust gas temperature.

The temperature of hot gas entering the spray dryer first depends on the composition and properties of the slurry. The composition of the mud shall not change due to drying, and the drying speed shall not be too fast due to too high temperature. Thus, the surface of the data is easy to form a hard shell, but the interior is still wet. The hard shell will hinder the contraction of the droplet, so that the space left by the evaporation of internal water cannot be reduced, so the bulk density of the powder is low. Therefore, the temperature of hot gas entering the tower should not be too high.

3. effect of rotating speed of centrifugal disk and spray pressure on powder function

(1) Under the condition that the specific gravity of the slurry and other working conditions remain unchanged, when the rotating speed of the centrifugal plate is added, the coarse particle content of the powder decreases, while the content of the fine powder is greatly added, which reduces the density of the large powder. In addition, it is easy to layer and stick to the mold during the forming process, the compression ratio is added, and the power consumption is added.

(2) As for the pressure mixed flow method (the atomizer is the nozzle), the operating pressure is the main factor affecting the spray height and the height of the drying tower, because the spray height and flow of nozzles with different apertures will add pressure with the addition.

1. Used for granulation of special ceramics

Before the sintering ceramic materials, the composition of green body has a direct impact on the function of the product, while the function of powder has a great impact on the uniformity of the blank and the density after dry pressing. Spray granulation technology is widely used to prepare special ceramic powders. In general, special ceramsite powder is sprayed and granulated by pressure atomization. Under suitable conditions, the powder has excellent chemical uniformity, high fineness, excellent fluidity and high compaction density. It is suitable for dry forming or isostatic pressing of special ceramic powder.

2. Use of lithium iron phosphate

The experimental results show that the spray drying process can provide excellent sphericity for the parent material before sintering, and its particle size is 20-20 μ M. Under the condition of spray drying, the chemical composition of the data is relatively uniform. There is no solid phase change between spherical particles during calcination, and the grain formation of LiFePO4 / C is limited to one spherical particle. Therefore, small LiFePO 4 / C grains can be obtained, and the fine grains are conducive to the electrical function of LiFePO 4 / C.

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