膨润土酸活化废酸水连续应用研究

Study on Circulating Utilization of Acidic Wastewater in Acidic Activation Process of Bentonite

传统湿法生产活性白土 ,系用一定浓度的硫酸去活化膨润土 ,整个工艺过程耗酸 2 %～ 3 5 % ,剩余的酸浓度为 15 %～ 16%的废酸水则直接排放 ,污染了环境。经试验 ,废酸水虽含有一些金属离子 ,但和酸度 3 %～ 5 %的一漂酸水可重复利用。废酸水连续使用二次 ,产品质量与传统法的基本相当 ,但可节水、节酸 ,又可保护环境。

Production of activated white clay by wet method is to make bentonite activation with certain concentration of surphuric acid.The acid consumption is 2% to 3.5% in this process and the surplus acid wastewater with concentration 15%～16% of acid will be drained off directly.Experiment shows that the acid wastewater with some metal ions and the first bleaching water with concentration 3%～5% of acid can be used again,quality of products is the same with traditional method,but this process can save water and acid and can protect environment.