粉煤灰制聚合氯化铝铁和白碳黑新工艺
发布时间: 2012-09-15 10:58 查看: 1562次
摘要：
采用粉煤灰制备聚合氯化铝铁和白碳黑.该法共分一次酸浸、碱溶、焙烧、二次酸浸4个阶段.实验确定的最佳工艺条件为:一次酸浸阶段酸溶温度100℃,碱溶阶段m(氢氧化钠):m(活化高硅渣)=0.6,二次酸浸阶段m(碳酸钠):m(灰渣A)=0.8、盐酸质量分数20%.在此条件下Fe~(3+)和Al~(3+)的总浸出率分别为96.54%和86.67%.主要产品聚合氯化铝铁的质量符合GB15892-2003<水处理剂聚氯化铝>的标准;产品白碳黑的质量符合GBl0517-89<沉淀二氧化硅>的标准.
Abstract：
Fly ash was used to prepare poly aluminum ferric chloride and white carbon black. The 4 stages of the process are as follows: acid leaching, alkali dissolution, roasting and secondary acid leaching. The optimum conditions are as follows; 100 t for first acid leaching stage, m(NaOH) : m(activated high content silica residue) =0. 6 for alkali dissolution stage, m(Na_2CO_3) : m( clinker A) =0.8 and 20% of HCl mass fraction for the secondary acid leaching stage. Under these conditions, the total leaching efficiencies of Fe~(2+) and Al~(3+) are 96.54% and 86.67% , respectively. The quality of the main product poly aluminum ferric chloride and white carbon black can meet the national standards of GB15892 -2003 and GB10517 -89, respectively.
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