用增溶溶出技术处理一水硬铝石矿

以氢氧化铝作为后加矿,采用增溶溶出技术处理一水硬铝石矿·研究了一段溶出配料摩尔分数、增溶温度、后加矿加入量、增溶时间对溶出效果的影响·确定了增溶溶出的工艺条件:一段配料摩尔分数控制在1 55～1 60,增溶温度为210～220℃,增溶时间为15～20min,后加矿加入量为一段溶出时矿石量的10%～15%·此条件下铝土矿的溶出率达到88 8%以上,溶出液的摩尔分数降至1 4以下·结果表明,此方法可以降低溶出液的摩尔分数,提高氧化铝的溶出率·

Enhancing the Digestion Efficiency of Diaspore Ore Pulp by Sweetening Technique

Al(OH)3 was introduced as additive to enhance the digestion efficiency of the diaspore ore pulp by sweetening technique and the digestion processs was investigated experimentally, especially effects of the mole fraction of the diaspore pulp before adding the Al(OH)3 in it, digesting temperature, dosage of Al(OH)3 and time for sweetening on the alumina thus produced. The results revealed that the appropriate conditions for digestion process are as follows: the mole fraction of the pulp should be controlled in the range from 1.55 to 1.60; sweetening temperature 210-220°C and time 15-20 min; Al(OH)3 dosage 10%-15% of the pulp. Under such conditions, the digestion efficiency of alumina can be increased to over 88.8% with the mole fraction of the solution less than 1.4 after sweetening process.