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以凹凸棒石尾矿中的蛋白石为原料,通过响应面法优化水热碱溶制备水玻璃的工艺条件,在单因素实验的基础上,以水玻璃模数和SiO_2浸出率的加权平均值为响应值,根据Box-Behnken的中心组合实验设计原理对反应温度、液固比、碱硅比(NaOH与SiO_2质量比)进行优化,对实验结果进行方差分析和验证,分析了各因素的显著性和交互作用.结果表明,最佳工艺条件为反应温度110℃,液固比6 mL/g,碱硅比4.05:10,该条件下水玻璃模数和SiO_2浸出率分别为2.85和81.4%,加权平均值最大,为76.1,模型相关系数R~2?0.9921,响应曲面法模型与实验数据一致性很好.
Based on the single-factor experiments, the hydrous alkali solution was optimized by the response surface method with the opal from the attapulgite tailings as the raw material, and the weighted average of the water glass modulus and the SiO 2 leaching rate was used as the response , The reaction temperature, liquid-solid ratio, alkali-silica ratio (mass ratio of NaOH to SiO 2) were optimized according to Box-Behnken’s central experimental design principle. The experimental results were analyzed by ANOVA and validated. The significance of each factor and The results showed that the optimum conditions were as follows: reaction temperature 110 ℃, liquid-solid ratio 6 mL / g, alkali-to-silicon ratio 4.05: 10, water glass modulus and SiO 2 leaching rate were 2.85 and 81.4% The largest value is 76.1, the correlation coefficient of the model is R ~ 2 ~ 0.9921, and the response surface method model is in good agreement with the experimental data.