碱烧结法处理铝灰制备氢氧化铝  

Preparation of aluminum hydroxide with aluminum ash by Alkali sintering method

作　　者：周扬民[1,2] 谢刚[1,2] 姚云[2] 田林[2] 谢天鉴[2] 和晓才[2] 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明冶金研究院,云南昆明650031

出　　处：《轻金属》2015年第9期12-14,35,共4页Light Metals

摘　　要：本文主要通过水洗、焙烧等方法对电解铝铝灰进行无害化处理，处理后铝灰采用碱烧结法进行熔融并水解溶出铝灰中的氧化铝。通过实验得出：铝灰中危害元素F和Cl脱除到铝土矿中微量杂质（0.001％～0.2％）范围以内，达到无害化处理的目的；采用碱烧结法处理铝灰可将其变为可溶性铝酸钠，然后进行水解制备氢氧化铝，铝的溶出率可达94．35％。A harmless treatment method for aluminum ash from aluminum reduction by rinsing and calcination is introduced in this paper, and alkali sinte- ring is used to melt the aluminum oxide from aluminum ash and then hydrolyze. Experiments show that the environmental - unfriendly F and C1 in the alu- minum ash should be controlled within 0.001%-0.2% of trace impurities in bauxite to realize the harmless disposal. Alkali sintering is capable to a- chieve the effective recycling of aluminum ash by making it soluble sodium aluminate that hydrolyzes to prepare aluminum hydroxide, where the dissolution rate of aluminum can reach to 94.35%.

关 键 词：铝灰 铝电解 无害化处理 碱烧结法 

分 类 号：TQ133.1[化学工程—无机化工] X758[环境科学与工程—环境工程]