New technology for recycling materials from oily cold rolling mill sludge  

作　　者：Bo Liu Shen-gen Zhang Jian-jun Tian De-an Pan Ling Meng Yang Liu 

机构地区：[1]Institute for Advanced Materials and Technology,University of Science and Technology Beijing

出　　处：《International Journal of Minerals,Metallurgy and Materials》2013年第12期1141-1147,共7页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Key Technology R&D Program of China (Nos.2012BAC02B01,2012BAC12B05,2011BAE13B07,and 2011BAC10B02);the National High-Tech Research and Development Program of China (No.2012AA063202);the National Natural Science Foundation of China (Nos.51174247 and 51004011);the Science and Technology Program of Guangdong Province,China (No.2010A030200003);the Ph.D. Programs Foundation of the Ministry of Education of China (No.2010000612003)

摘　　要：Oily cold rolling mill （CRM） sludge is one of metallurgical industry solid wastes. The recycle of these wastes can not only protect the environment but also permit their reutilization. In this research, a new process of ＂hydrometallurgical treatment ＋ hydrothermal synthesis＂ was investigated for the combined recovery of iron and organic materials from oily CRM sludge. Hydrometallurgical treatment, mainly including acid leaching, centrifugal separation, neutralization reaction, oxidizing, and preparation of hydrothermal reaction precursor, was first utilized for processing the sludge. Then, micaceous iron oxide （MIO） pigment powders were prepared through hydrothermal reaction of the obtained precursor in alkaline media. The separated organic materials can be used for fuel or chemical feedstock. The quality of the prepared MIO pigments is in accordance with the standards of MIO pigments for paints （ISO 10601-2007）. This clean, effective, and economical technology offers a new way to recycle oily CRM sludge.Oily cold rolling mill （CRM） sludge is one of metallurgical industry solid wastes. The recycle of these wastes can not only protect the environment but also permit their reutilization. In this research, a new process of ＂hydrometallurgical treatment ＋ hydrothermal synthesis＂ was investigated for the combined recovery of iron and organic materials from oily CRM sludge. Hydrometallurgical treatment, mainly including acid leaching, centrifugal separation, neutralization reaction, oxidizing, and preparation of hydrothermal reaction precursor, was first utilized for processing the sludge. Then, micaceous iron oxide （MIO） pigment powders were prepared through hydrothermal reaction of the obtained precursor in alkaline media. The separated organic materials can be used for fuel or chemical feedstock. The quality of the prepared MIO pigments is in accordance with the standards of MIO pigments for paints （ISO 10601-2007）. This clean, effective, and economical technology offers a new way to recycle oily CRM sludge.

关 键 词：cold rolling mills sludge disposal HYDROMETALLURGY hydrothermal synthesis recycling  waste utilization 

分 类 号：X757[环境科学与工程—环境工程]