首秦资源类固废综合回收利用实践

Practice on comprehensive recycling of solid waste resources in Shouqin Company

主要论述了在大力推广钢铁企业绿色可持续发展的大背景下,首秦对厂内资源类固废回收利用的探索和实践。除小部分固废可直接回吃外,首秦通过厂内自建加工线进行加工回吃,实现了大部分固废的回收利用,提高了自消纳率,为企业创效的同时,也为环境作出了积极贡献。2013年以来资源类固废回吃比例达到72%,比2012年提高2.3%。高炉渣通过自建水渣超细磨工艺实现年产水渣微粉约60万t。钢渣通过自建钢渣处理生产线,对渣钢进行干磨深加工,精选出水磨豆钢及钢渣水磨粉两种产品分别返回炼钢和烧结回收利用。烧结和高炉无法自回收利用的烧结机头三电厂除尘灰、高炉布袋灰与炼钢OG泥、氧化铁皮等固废配加一定燃料和皂土烧成红泥砖,烧成砖后破碎成一定粒度,返回炼钢作为冷却剂使用,破碎后的粉末返回烧结使用,后期该工艺改为玻璃胶冷固球团工艺,降低加工费20元/t。

The exploration and practice of solid waste recovery and utilization of domestic resources under the background of promoting the green sustainable development of iron and steel enterprises were mainly discussed.In addition to a small part of the solid waste that can be eaten directly,Shouqin Company has processed and eaten through the factory’s self-built processing lines,which has achieved the recovery and utilization of most solid waste and improved the self-absorption rate.It has also made positive contributions to the environment while creating results for the company.The solid wastes used as metallurgical material accounted for 72%since 2013,which was 2.3% higher than that of 2012.About 0.6 million tons water slag powder was produced by superfine grinding process.Steel slag was dry grinded and further processing,then the steel bean and steel slag powder to be produced were return to steelmaking and sintering process respectively.The solid wastes,which could not be recycled directly such as the sintering electrostatic precipitator dust,BF bag dust,OG sludge and oxide scale,were made into bricks with the addition of fuel and bentonite.The bricks were crushed to a certain size and then used as coolant in steelmaking process,meanwhile,the residual powder was recycled as sintering additive,in the later period,the process was changed to glass gel cold solid pellets,and the processing cost was reduced by 20 yuan per ton of ore.