微粉氢氧化铝用粗液常压脱硅工艺研究  

Study on Normal-pressure Desilication Process of Crude Sodium Aluminate Solution for Aluminium Hydroxide Micro-powder

作　　者：杜善国 王科 

机构地区：[1]中国铝业山东分公司,山东淄博255052

出　　处：《山东冶金》2012年第2期41-42,45,共3页Shandong Metallurgy

摘　　要：介绍了用石灰乳和液态脱硅剂对粗液进行常压脱硅试验,结果表明,液态脱硅剂脱硅过程中溶液氧化铝损失小,αk降低幅度小。经过脱硅剂脱硅后溶液的A/S最高能达到230左右。随后对脱硅溶液进行了分解氢氧化铝微粉试验,数据表明,用液态脱硅剂将溶液A/S脱到200左右可以满足微粉氢氧化铝分解的指标要求。Desilication process of crude sodium aluminate solution was studied with lime milk and liquid desilication agents. The result showed that caustic ratio and alumina concentration of desilication process with liquid desilication agents kept stability and the A/S was 230 in the maximum. The aluminium hydroxide powder was obtained by decomposing coarse liquid desilication system. The result showed that crude sodium aluminate solution could generate aluminium hydroxide powder when the A/S of system was 200.

关 键 词：粗液 常压脱硅 石灰乳 液态脱硅剂 

分 类 号：TF821[冶金工程—有色金属冶金]