The technological process for preparing phosphorous acid from the production waste of sodium hypophosphite was described. 介绍了从次磷酸钠生产废渣中回收提取亚磷酸的工艺。
This article tells of rich ore nutrition in waste dregs, which can be used as in the fields of crops to solve pollution in dregs, to promote agriculture production as well. 摘要电解金属锰生产废渣含有丰富的矿质营养元素，将此渣作为农作物田地消化利用，既可解决当前废渣污染环境的困境，又可促进农业生产。
