Abstract：It is noteworthy that the stainless steel pickling sludge contains not only valuable metals like Ni, Cr and Fe but also high contents of CaO and CaF2 can be utilized. As an important secondary resource, the yield of pickling sludge is about 2.5%5.0% of that of stainless steel with an annual output of at least 650 000 t in China. The pickling sludge was classified as a type of toxic solid waste due to its Cr6+ and F- content. The conventional solidified landfill treatment takes up land and wastes resources. The physicochemical properties of the typical pickling sludge were compared and analyzed. The main technical points of the comprehensive utilization process, such as the extraction of valuable metals and preparation of building materials from the pickling sludge, were summarized. The green utilization idea and the technological progress of pickling sludge as metallurgical raw materials in smelting enterprises were put forward. It is expected to make full use of the valuable metal elements and components of slagging materials in the stainless steel pickling sludge,and to eliminate the environmental hazards of the sludge.
李小明，贾李锋，邹冲，崔雅茹. 不锈钢酸洗污泥资源化利用技术进展及趋势[J]. 钢铁, 2019, 54(10): 1-11.
LI Xiaoming，JIA Lifeng，ZOU Chong，CUI Yaru. Progress and trend on comprehensive utilization of stainless steel pickling sludge. Iron and Steel, 2019, 54(10): 1-11.
