一种资源化治理铬渣污染的方法

研发了一种将铬渣烧制为瓷质骨料的方法。将有毒铬渣、高铬土壤和粘土、煤渣等原料经干燥、湿磨、干磨、破碎等工艺后按照配方搅拌混合均匀，并挤制成条状或球状的骨料素坯，在1 200±30 ℃高温、还原条件下，在回转窑中烧结而成瓷质骨料。运用该方法得到的瓷质骨料，采用二苯碳酰二肼分光光度法测试的Cr⁶⁺含量均低于0.05 mg·L^-1，远低于国家标准的0.5 mg·L-¹，放置5年后，Gr⁶⁺含量不变。该方法工艺简单，除毒彻底，形成稳定的类质同相混晶结构，不会产生二次污染，可资源化利用至混凝土中，产业化经济效益可靠。

A recycling method reducing chromium residue pollution

We invent a method changing chrome residue into ceramic bone stuff. We initially manufacure bone bisque, and then ceramic bone stuff is formed at 1 200±30 ℃ high temperature and reduction condition by the rotary kiln sintering. The method has such characteristics as simplicity, economics, reliablity, good rigidity and stable structure, so it can be available to concrete recycling. Experiments show that the content of the chromium residue ceramic bone stuff is lower than 0.05 mg·L-1, and that the content of Cr6+ remains unchanged after 5 years.