How to improve spray drying granulation efficiency and powder quality, thereby reducing production cost and improving product qualification rate, is a topic that ceramic workers have been discussing. Spray drying is one of the largest energy consumers in ceramic factories. Its fuel consumption accounts for about 20% of the fuel consumption of ceramic products and about 30% of the powder production cost. It is particularly important to improve the milling efficiency and save energy; at the same time , The good quality of the powder directly affects the pass rate of the later products.
On the premise of ensuring the fluidity of the mud, the mud concentration can be increased. We know that the higher the slurry concentration, the smaller the energy consumption per unit mass of powder drying.
However, in production, the viscosity of the slurry increases, the fluidity becomes poor, and the atomization effect becomes poor. Therefore, a suitable water reducing agent can be selected to ensure the mud with good fluidity and high concentration.
Production practice shows that: the concentration increases by 10%, the evaporative water volume decreases by 50-60%, the energy consumption decreases by 30-40%, while the output increases by 60-80%. can be significantly improved. Due to the small droplet shrinkage, the percentage of large particles increases, the exhaust performance improves, the dry powder bulk density increases, and the compression ratio decreases.
At present, the commonly used water reducing agents in ceramic factories are: sodium humate, water glass, STPP, tanning water reducing agent (AST), sulfurous acid pulp waste liquid, sodium polyacrylate, etc.
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