摘要
为探讨磷石膏转化利用的新途径,进行了用氢氧化钠分解磷石膏将其转化为氢氧化钙和硫酸钠的实验。以一次一因素实验法考查了影响磷石膏分解的主要因素及可以获得的较优工艺条件。同时通过化学分析和粒度分析对滤渣的性质进行了分析评价。实验表明磷石膏分解适宜的工艺条件:配料比(氢氧化钠与磷石膏的质量比)为0.48∶1,液固比(水与磷石膏的质量比)为4∶1,反应温度为室温,反应时间为10 min。在此条件下磷石膏的分解率可达94.83%,滤渣中氢氧化钙的含量为80.96%(质量分数)。该工艺的优点是磷石膏分解速率快、分解转化效率高。
In order to explore a new way for the transformation and utilization of phosphogypsum.A test was conducted to de-compose phosphogypsum with sodium hydroxide and convert itto calcium hydroxide and sodium sulfate.The main factors in-fluencing the decomposition of phosphogypsum and the optimum process parameters were investigated by one factor test method.At the same time,the properties offilter residue were analyzed and evaluated by chemical analysis and particle size analysis.Results showed that the optimum conditions were as follows ：the mass ratio of sodium hydroxide to phosphogypsum was 0.48：1 ,the ratio of liquidto solid was 4：1 ,the reaction temperature was room temperature,and the reaction time was 10 min. The decomposition rate of phosphogypsum could reach 94.83% ,and the content of calcium hydroxide in filter residue was 80.96%（mass fraction）.The advantage ofthe process was that the decomposition rate of phosphogypsum was fast and the de-composition and conversion efficiency was high.
出处
《无机盐工业》
CAS
北大核心
2017年第9期54-56,共3页
Inorganic Chemicals Industry
基金
国家自然科学基金面上项目(51374156)
关键词
磷石膏
氢氧化钠
分解
转化
phosphogypsum
sodium hydroxide
decomposition
transformation
