本文研究了碳酸钾在膨润土层间与硫酸反应生成硫酸钾层间结晶,实验得出其最佳工艺条件为:一次水浴温度80 ℃,搅拌速度1.5 m/s,搅拌时间30 min,矿浆浓度为20 g膨润土溶于100 mL蒸馏水中;分段水浴温度70～70 ℃,分段搅拌速度0.5～2.0 m/s.正交试验与单因素实验结果吻合,其因素影响顺序为:搅拌速度>矿浆浓度>水浴温度>搅拌时间.其最大层间结晶达到4.2 g.从SEM、EDS图片显示硫酸钾成功结晶于膨润土层空间,没出现包裹现象,使对硫酸钾的固定与缓释有更深一步的认识.
This paper studied on the reaction between sulfuric acid and potassium carbonate in the bentonite layer to potassium sulfate for crystalline in the layer. The optimum experimental conditions were as follows:water bath temperature is 80 ℃,stirring speed is 1.5 m/s, stirring time is 30 min, concentration is 20 g bentonite slurry dissolved in distilled water whose volume is 100 mL; sub-water bath temperature is 70-70 ℃, sub-stirring speed is 0.5-2.0 m/s.The results of single factor experiments and orthogonal experimental are anastomosis. Order of its factors: stirring speed> pulp concentration > water temperature> stirring time. Its best crystallization of layers achieve is 4.2 g. The SEM, EDS picture shows the success of the crystallization of potassium sulfate in the bentonite layer space. The phenomenon of package isn' t appear,so it's a better understanding for releasing of fixed potassium.
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