α型六水合硫酸镍结晶过程粒度控制工艺研究  

Study on particle control process of crystallization process of α-nickel sulfate hexahydrate

作　　者：艾芮玄 李先朝 朱亮[1,2] 沙作良[1] 

机构地区：[1]天津市海洋资源与化学重点实验室天津科技大学海洋科学与工程学院,天津300457 [2]迈安德集团有限公司

出　　处：《无机盐工业》2015年第12期25-29,共5页Inorganic Chemicals Industry

基　　金：天津市应用基础与前沿技术研究计划(14JCZDJC40900);高等学校博士学科点专项科研基金资助项目(20121208120001)

摘　　要：采用固液平衡法测定了31.5~53.0℃分析纯α型六水合硫酸镍在水中的溶解度,并利用固液平衡经验方程拟合出对应温度下的溶解度方程。采用目测法测定了分析纯α型六水合硫酸镍在31.5~53.0℃的介稳区宽度,为结晶工艺条件优化提供了依据。系统考察了降温速率、晶种粒度、晶种添加量以及溶液初始p H对α型六水合硫酸镍结晶粒度的影响,初步确定了优化的结晶工艺条件。A solid-liquid equilibrium method was used to study analytically pure α-nickel sulfate′ s solubility in water at temperature of 31.5~53.0 ℃,and the equation of α-nickel sulfate hexahydrate was fitted via the solid-liquid equilibrium experiential equation.At the temperature of 31.5~53.0 ℃,the metastable zone width,of the analytically pure α-nickel sulfate hexahydrate was measured by visual method for optimizing the crystallization process conditions.The effects of cooling rate,seed size,amount of seed,and initial p H of solution on crystal size of α-nickel sulfate hexahydrate were investigated and the optimized crystallization process conditions were preliminarily confirmed.

关 键 词：α型六水合硫酸镍 结晶 粒度分布 介稳区 结晶工艺 

分 类 号：TQ138.13[化学工程—无机化工]