公开(公告)号：EP0508697A1

公开(公告)日：1992-10-14

申请号：EP92302999.5

申请日：1992-04-03

申请人： Situ, Qi-Jiang ,  Huang, Yan-Pei

发明人： Situ, Qi-Jiang ,  Huang-Pei-Nian, c/o Qiunfeng New Tech Factory ,  Zeng, De-Han, c/o Qiufeng New Tech Factory ,  Hu,Zhi-Fa, c/o Quifeng New Tech Factory ,  Li, Xing-Qin, c/o People's Chemical Plant ,  Wen, Zhi-Quan, c/o Qiunfeng New Tech Factory ,  Xu, Ke-Ming

IPC分类号： C01G37/14 ,  C22B34/32 ,  C01G37/02 ,  C01G37/08

CPC分类号： C21B3/04 ,  C01G37/02 ,  C01G37/08 ,  C01G37/14 ,  C01P2006/80 ,  C22B34/32 ,  Y02P10/212 ,  Y02W30/542

摘要： A re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues, comprising adding small amount of residue ore powder, sodium carbonate, or additionally, a certain amount of coke powder to the poisonous chromic residues, and calcining the mixture in a re-calcinating apparatus at 1000-1200°C, for 30-60 minutes. The re-calcined grog is extracted with water, to obtain an extractive liquor containing sodium chromate. The extractive liquor can be used to produce chromium oxide, basic chromium sulfate or medium chrome yellow; while the extracted residues can be sintered at high temperatures with iron ore powder and coke to obtain a massive self-melting sintered iron, which can be further converted to a low-chromium cast iron. This process can thoroughly detoxify the chromic residues, effectively recover Cr2O3 and remove water-soluble Cr+6, whereby various important industrial materials are produced. The method brings very good economical and environmental benefits.

摘要翻译： 用于解毒和铬酸残基的综合利用，包括将残余矿石粉末，碳酸钠，或另外地，焦炭粉末与毒铬残留一定量的量小，并且在焙烧该混合物的再煅烧和提取过程 在1000-1200℃下重新焙烧30-60分钟设备。 重新煅烧的熟料用水萃取，以获得关于采掘含酒铬酸钠。 萃取液可用于产生三氧化二铬，碱性硫酸铬或中铬黄; 而提取的残余物可以在含有铁矿石粉和焦炭的高温下烧结，得到了大规模的自熔化烧结铁，其可以进一步转化为低铬铸铁。 这个过程可以彻底解毒铬残基，有效地回收Cr2O3和除去水溶性的Cr + 6，由此产生的各种重要的工业材料。 该方法带来了很好的经济效益和环境效益。