钾长石综合利用工艺研究  

The Technology for Comprehensive Utilization of Potash Feldspar

作　　者：刘佳囡 申晓毅[1] 张俊[1] 翟玉春[1,2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819 [2]东北大学秦皇岛分校,河北秦皇岛066004

出　　处：《矿产综合利用》2015年第6期25-28,共4页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金资助项目(NO.51204054);国家重点基础研究发展计划项目(2007CB613603)

摘　　要：针对辽宁某地钾长石的特点,设计了钾长石综合利用工艺流程。采用Na_2CO_3中温焙烧,在较低温度下破坏钾长石的结构。碱溶焙烧熟料得到Na_2Si O_3溶液和K、Na和Al的富集渣。碳分Na_2Si O_3溶液制取白炭黑。酸化K、Na和Al的富集渣,经水浸、过滤得到白炭黑和含K、Na和Al的溶液。Na_2CO_3沉铝得到Al(OH)_3与K、Na分离。Na_2SO_4、K_2SO_4循环至一定浓度后分步结晶得到Na_2SO_4和K_2SO_4晶体。可采用CO还原Na_2SO_4制得Na_2S。整个工艺流程实现了Si、K、Na和Al的综合利用,无废弃物排放。A novel clean technology for potash feldspar in Liaoning Province was presented. The structure of potash feldspar was destroyed by roasting using NaaCO3. NazSiO3 solution and residue rich in K,Na and Al were obtained by alkali leaching, respectively. Silica white was prepared by carbonating Na： SiO3 solution using COa. The residue rich in K, Na, Al was acidized by HE S04. Silica white and acid solution composed of K, Na, AI were obtained through water leaching, filtering, respectively. And Al （OH）3 was synthesized by adding Na2CO3 solution into the filtrate to achieve the separation of Al from K and Na. When the concentrations of Na2SO4 and KzSO4 reached up to a certain degree,fractional crystallization was adopted to get Na2SO4 and K2S04, respectively. NazSO4 could be re- duced to Na2S by CO. Si,K, Na,Al were extracted and transformed into products in the whole technology, respectively. Then achieved the comprehensive utilization of potash feldspar and no pollutant was discharged.

关 键 词：钾长石 综合利用 碳酸钠 氢氧化铝 白炭黑 硫酸钾 硫化钠 

分 类 号：TD981[矿业工程—选矿]