微硅粉制备五水偏硅酸钠试验研究  

Experimental Study on Preparation of Sodium Metasilicate Pentahydrate Using Micro-silica Powder

作　　者：张忠益 赵兴凡 罗文波[2] 王国卫 

机构地区：[1]云南永昌硅业股份有限公司,云南保山678300 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《盐业与化工》2016年第3期20-23,共4页Jounral of Salt and Chemical Industry

摘　　要：云南永昌硅业股份有限公司每年约产出4万t微硅粉,由于微硅粉的滞销,既造成严重的环境污染,也浪费宝贵的资源。为综合回收利用微硅粉,变废为宝,拟采用微硅粉碱性焙烧-水浸出-冷却结晶-烘干的工艺生产高附加值产品五水偏硅酸钠,整个工艺可行,产品质量达到标准要求,硅的回收率可以达到67%以上。Yunnan Yongchang Silicon Industry Co., Ltd produced about 40000 tons micro - silica powder per year, which caused severely environmental pollution and waste of resources as un- marketable. In order to comprehensive use of micro - silica powder, the company used micro - silica powder roasting with alkaline clinker - water leaching - cooling crystallization - drying technology to produce high value -added sodium metasilicate pentabydrate. The result showed that technology was feasible, the quality of products was up to standard and the total recovery of silicon was above 67%.

关 键 词：微硅粉 焙烧 冷却结晶 五水偏硅酸钠 

分 类 号：TQ170.6[化学工程—硅酸盐工业]