利用铬盐废渣生产的混凝土外加剂,虽具有提高混凝土早期强度等优点,但在使用过程中会造成二次污染,严重影响其推广应用。本文介绍了采用干法或湿法将铬盐废渣中六价铬绝大部分或全部转化为三价铬的无毒化处理后,便可解决上述问题的情况;同时,认为采用干法处理较为理想。 Although the concrete admixture produced by using chromium salt waste residue has the advantages of improving the early strength of concrete, it will cause secondary pollution during use, which will seriously affect its popularization and application. This article describes the use of dry or wet methods for the non-toxic treatment of the conversion of most or all hexavalent chromium from trivalent chromium residue to trivalent chromium. This will solve the above problems. At the same time, it is considered that the dry process is ideal. .