聚丙烯酸钠对提高碳母蒸发浓度的作用

The effect to raise the consistence of carbonic acid mother liquor with sodium polyacrylate

碳分母液蒸发是烧结法氧化铝生产中的重要工序,由于碳母平衡浓度的限制,目前生产上碳蒸母Na2 O浓度一般控制在2 2 0 g/L。本文通过对比试验发现在碳母中加入聚丙烯酸钠可提高其蒸发平衡浓度,当聚丙烯酸钠的添加浓度为2 5 ppm时,碳蒸母中Na2 O浓度可提高到2 4 0 g/L以上。聚丙烯酸钠还能抑制蒸发系统的结垢。

Carbonic aicid mother liquor evaporation is a important process in sintering almina production. Because of the limit that equilibrium concentration, At present, sodium oxide concent consistency of carbonic aicid mother liquor steamed are controlded within 220g/L. In this article, the effect to raise the consistence of carbonic aicd mother liquor evaporate when the sodium polyacrylate be added which got through contrast test,When the sodium polyacrylate evaporate added 2.5ppm, sodium oxide evaporate can be increased to more than 240g/L. The sodium polyacrylate can constraint fouling,and prolongate the busy period of equipment.