文献类型：期刊文献

中文题名：响应面法优化氨碳化-钙转化连续法制备碳酸钙工艺

英文题名：Optimization of preparation of calcium carbonate from continuous crystallization process of ammonium carbonate and conversion of calcium sulfate by response surface methodology

作者：陈波[1];宋兴福[1];许妍霞[1];孙玉柱[1];于建国[1]

机构：[1]华东理工大学国家盐湖资源综合利用工程技术研究中心,上海200237

年份：2016

卷号：48

期号：9

起止页码：18

中文期刊名：无机盐工业

外文期刊名：Inorganic Chemicals Industry

收录：CSTPCD;;北大核心:【北大核心2014】；

基金：国家高技术研究发展计划项目(2011AA06A107)

语种：中文

中文关键词：石膏;碳酸钙;结晶;连续法;响应面法

外文关键词：gypsum ; calcium carbonate ; crystallization ; continuous method; response surface methodology

摘要：以氨碳化-钙转化连续法制备碳酸钙工艺为考察对象,利用单因素条件实验考察了停留时间、结晶温度、固液质量比和搅拌转速对二水硫酸钙转化率的影响。利用响应面法实现了实验设计的优化,建立了响应值与影响因子之间的二次多项式回归模型并得到最优影响因子水平。实验结果表明:因素影响的关系为停留时间>结晶温度>固液质量比>搅拌转速;停留时间与结晶温度的交互影响显著,其余项两两交互影响不显著;预测模型的相关系数R^2=98.17%且P值极显著,实验值与预测值的平均绝对误差为0.32%;最优影响因子的水平为停留时间为170 min、结晶温度为316.65 K、固液质量比为0.050、搅拌转速为315 r/min,此时理论钙转化率可达到99.72%、实验值为99.61%。
Preparation of calcium carbonate from continuous crystallization process of ammonia carbonate and conversion of calcium sulfate was researched. Influences of residence time, crystallization temperature, mass solid-liquid ratio, and stirring speed on conversion of calcium sulphate dihydrate were investigated.Response surface methodology was used to design optimized experiments, a quadratic polynomial regression model for conversion of calcium sulfate and factors was established, and the optimal levels of factors were obtained.Significance of single factors was：residence time〉temperature〉solid-liquid ratio 〉stirring rate.Interaction influence of residence time and temperature was significant, and interaction influence of other factors was insignifieant.R^2 for regression model was 98.17% and P value was significant, and average error between experimental values and predicted values was 0.32%.Optimal level of factors was as follows：residence time was 170 min, temperature was 316.65 K, solid-liquid ratio was 0.050, and stirring speed was 315 r/min.The theoretical conversion of calcium sulfate under optimal conditions was 99.72%, and the experimental value was 99.61%.