不锈钢冷轧污泥配矿压球工艺及冶金性能研究

Study on metallurgical properties and pellet proportioning technology of stainless steel cold-rolling sludge

冷轧污泥成分复杂、产量大、危害严重,已成为不锈钢企业环保治理的难点,国内外尚无妥善安全又经济实用的利用途径。针对不锈钢冷轧污泥的特点,进行了配矿压球、高温焙烧的正交试验,考察了污泥球团的主要冶金性能。结果表明,污泥掺量30%时,球团抗压强度、化学成分和主要冶金性能满足高炉要求;按照10%进行配料,对高炉顺行无影响,是一条工艺简单、技术可行的无害化处理途径。

With a complicated composition, large environment, stainless steel cold-rolling sludge has been protection for stainless steel enterprises. Up to now, technologies come into being that are not only proper, safe production and serious damage to the a focal point concerning environmental neither at home nor abroad have any 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 hightemperature 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.