锡酸钠工业生产结晶工艺的研究  

Study on crystallization process of sodium stannate industrial production

作　　者：谢雪珍 

机构地区：[1]柳州华锡铟锡材料有限公司,广西柳州545005

出　　处：《中国有色冶金》2017年第4期28-31,共4页China Nonferrous Metallurgy

摘　　要：在锡酸钠结晶过程中加入超细晶种诱导可以生产出大颗粒晶状产品,外观得到了改善,保质期延长。最佳晶种制备工艺:真空度为-0.09 MPa,浓缩波美度为1.15°Be′搅拌速度为90 r/min,结晶时间1 h,结晶温度为130℃。最佳结晶工艺:在1.10~1.1°Be′溶液波美度下加入晶种,真空度为-0.08 MPa,晶种加入速度为14 g/s,搅拌速度为50 r/min,结晶时间6 h,结晶温度为80℃。此条件下得到的产品晶体均匀,光泽度好,粒度在220-250μm,保质期由192 d延长至250 d。Ultra-fine crystal seed is added to sodium stannate crystallization process to produce large-particle crystalline product, so that the product appearance is improved and expiration date extended. The optimum crystal seed preparation process： vacuum degree is -0.09 MPa, concentration Baume degree is 1.15, agitation speed is 90 r/min, crystallization time is 1 h, and crystallization temperature is 130 ℃. The optimum crystallization process： the crystal seed is added at Baume degree of 1.10 - 1.15 and vacuum degree -0.08 MPa, crystal seed addition speed is 14 g/s, agitation speed is 50 r/min, crystallization time is 6 h, crystallization temperature is 80 ℃. Under such conditions, the obtained crystalline product is even with good glossiness, the particle size is 220 - 250 μm and expiration date extended from 192 d to 250 d.

关 键 词：锡酸钠 晶种 结晶 浓缩 

分 类 号：TQ131.12[化学工程—无机化工]