New technology for recycling materials from oily cold rolling mill sludge
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第12期
论文作者：Bo Liu Shen-gen Zhang Jian-jun Tian De-an Pan Ling Meng Yang Liu
文章页码：1141 - 1147
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 o?ers a new way to recycle oily CRM sludge.
Bo Liu，Shen-gen Zhang，Jian-jun Tian，De-an Pan，Ling Meng，Yang Liu
Institute for Advanced Materials and Technology,University of Science and Technology Beijing
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 o?ers a new way to recycle oily CRM sludge.
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