高钾铝酸盐溶液脱硅过程研究  

Experiments on Desilicification from Aluminate Solution with High Content of Potassium

作　　者：左以专[1] 徐远志[1] 彭建蓉[1] 杨刘祥[1] 杨大锦[1] 

机构地区：[1]昆明冶金研究院

出　　处：《云南冶金》1999年第1期32-39,共8页Yunnan Metallurgy

基　　金：云南省重点科技攻关项目

摘　　要：以不同钾比的实际熟料溶出液为试液，进行了中压脱硅与常压深度脱硅实验研究，确定了中压脱硅时溶液钾比（Ｋ／Ｒ）ｙ与其硅量指数Ａ／Ｓ及所获硅渣钾比（Ｋ／Ｒ）ｚ间的依存关系为：Ａ／Ｓ＝１００×（３１８（Ｋ／Ｒ）２ｙ－５６９（Ｋ／Ｒ）ｙ＋２６４）１／２；（Ｋ／Ｒ）ｚ＝－００６２６＋０４２２４ｌｎ（１＋（Ｋ／Ｒ）ｙ１－（Ｋ／Ｒ）ｚ）；同时还明确了溶液钾比对常压脱硅深度有不良影响。试验证明，只需提高中压脱硅温度和增加常压脱硅石灰乳添加量，高钾铝酸盐溶液仍可用传统的两段脱硅流程进行脱硅处理。Taking nephiline sinter leaching solutions of different potassium rates (K/R) y as samples, desilicification experiments under middle pressure and/of atmosphere were undertaken respectively. Under middle pressure, correlation of the (K/R) y to silicon index A/S in the solution and of the (K/R) y to potassium rate (K/R) z in the silicon slag obtained were determined as A/S=100×{31 8(K/R) 2 y-56 9(K/R) y+26 4) 0 5 and (K/R) z=-0 062 6+0 422 4 ln{ 1+(K/R) y ÷ 1-(K/R) y } respectively. It is also disclosed that the (K/R) y has negative effect on desilicification degree under atmosphere. The experiments demonstrate that the traditional two-stage desilicification process is still suitable for aluminate solutions with high potassium content by raising temperature of desilicification and enlarging addition of lime emulsion into desilicification under atmosphere.

关 键 词：霞石 脱硅 高钾铝酸盐溶液 氧化铝 

分 类 号：TQ133.1[化学工程—无机化工]