What Is Tabular Corundum Production Technology?

1. Ball mill. THis is the first step to get Tabular corundum , The continuous ball milling was carried out by using bayer method to lightly burn alumina powder. The fineness and specific surface area should meet the requirements, which is helpful to sintering and densification of alumina powder.

2, Into the ball. The powder after grinding is made of ball plate or ball tube. After forming, the green ball should have strength to avoid breaking in the process of transport to the dryer. In view of the problems such as high water content, easy layering and difficult drying of semi-finished balls in pelletizing process, the corresponding process optimization design is carried out and properly solved.

3. After drying and forming, the green ball is put into the dryer. Remove approximately 15%(W) of moisture by counter-current hot air drying in the shaft kiln. However, the temperature in the shaft kiln should be strictly controlled to avoid cracks and delamination, even agglomerations and furnace blocking. The ball flow is interrupted and the drying quality is decreased.

4, sintering. this is the key step to get high purity Tabular corundum After drying, the billet balls enter the shaft kiln. Sintering temperature is 1900 '1950°C. By controlling the temperature and flow rate of hot air in the shaft kiln, the crystal is fully developed. Sintered tabular corundum structure.

After firing, products of different particle sizes can be obtained after cooling, picking up (picking up burnt and under-burnt products), inspection (physical and chemical indicators of sintered products are checked), crushing and screening.

In the end, we will get the ideal refractory materials---Tabular corundum