苛化白泥在陶瓷材料中的应用研究

Application of White Sludge of Paper Industry in Ceramic Material

根据草浆碱回收苛化白泥的组成、性能特点 ,将其应用于陶瓷材料的实际生产中并进行了低成本无害化处理。实验结果表明 ,白泥是一种优质的钙质原料。通过实验配方的调整 ,白泥在陶瓷石灰釉中的用量为 1 5 %～ 2 2 % ,在水晶熔块中的用量为 2 5 % ,在低温合成硅灰石中的用量可达 70 % ,合成的硅灰石用于试制釉面砖可实现低温一次快速烧成。其应用产品的理化性能指标均达到国家标准 ,每吨产品可消耗白泥 0 0 5～ 0 2t,降低成本 1 0 %～ 1 8%。

White sludge of paper industry is a kind of solid wastes. It mainly contains CaCO 3 (>85%), its particles are fine (≤5μm) and have high activity. The white sludge after processing can be used as calcareous raw material of ceramics. According to the characteristics of the composition and property of the sludge, taking the sludge as the main raw material and selecting calcareous glaze, quartzy frit, synthetic wollastonite and wollastonite glaze tile as the objects of the study, the sludge was harmlessly processed with lower cost. The results indicated that the sludge is the high quality calcareous raw material. By adjusting the experimental formula, the used amount of the sludge was 15%～22% in the calcareous glaze, 25 % in the quartzy frit and 70 % in the synthetic wollastonite. Low temperature and fast sinter could be realized by using the synthetic wollastonite for producing the glaze tile. The physical and chemical performance of the products reached the state standards. 0.05～0.2 tons of white sludge were used for producing one ton product, it would decrease the product cost by 10%～18%.