Study on metallurgical properties and pellet proportioning technology of stainless steel cold-rolling sludge |
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Affiliation: | SHI Lei,CHEN Ronghuan and WANG Ruyi Ironmaking and Sustainability Division,Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China |
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Abstract: | With a complicated composition,large production and serious damage to the environment,stainless steel cold- rolling sludge has been a focal point concerning environmental protection for stainless steel enterprises. Up to now , neither at home nor abroad have any technologies come into being that are not only proper,safe and economical but also suitable for bulk utilization of stainless steel cold-rolling sludge. Based on the characteristics of the stainless steel cold- rolling sludge,orthogonal experiments were carried out on pellet proportioning and high-temperature roasting,and major metallurgical properties of sludge pellets were also tested. As the results show ,pellets with 30% addition of cold-rolling sludge are qualified regarding their compressive strength,chemical composition and major metallurgical properties. No adverse impact happens to the blast furnace operation when sludge pellets account for 10% of the blast furnace raw materials. Therefore,the technical route applied in this paper is proved simple,feasible and environmentally friendly for cold-rolling sludge treatment. |
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Keywords: | stainless steel cold-rolling sludge pellet proportioning metallurgical properties |
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