不锈钢AOD渣粉尘控制及其工程性能  

Dust control and engineering performance of stainless steel AOD slag

作　　者：吕岩[1] 那贤昭[1] 齐渊洪[1] 甄常亮[2] 

机构地区：[1]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [2]唐山钢铁集团有限责任公司炼铁部,河北唐山063016

出　　处：《钢铁》2015年第4期76-83,共8页Iron and Steel

基　　金：国家高技术研究发展(863)计划资助项目(2009AA064003)

摘　　要：不锈钢AOD渣在冷却过程中由于晶格转变体积膨胀导致粉化,易造成粉尘污染。研究表明,出渣时喷入含硼改质剂能有效抑制AOD渣从β-C2S相向γ-C2S相的晶格转变,从而使粉化扬尘率降低90.1%。对无害化处理后的不锈钢AOD渣进行资源化利用探讨,结果显示,由于钢渣具有水硬胶凝活性,可作为水泥砂浆掺合料取代部分水泥,掺量范围应在0-30%之间。同时,对AOD渣及其水泥试块进行毒性浸出检测,结果表明,其中总铬、六价铬等浸出值均低于标准限值,不存在重金属浸出的问题,可进行后续资源化利用。Owing to the lattice transformation during cooling process, the expansion and pulverization of stainless steel AOD slag would happen. Then, it will result in dust pollution easily. And it is indicated that the lattice transformation from β-C2S to γ-C2S can be effectively controlled by injecting boron modified agents during the deslagging, and the pulverization rate of dust was reduced by 90.1%. The harmless treated stainless steel AOD slag can be used as cement mortar admixture as resource utilization, and the substitution rate for cement can be 0-30%. Meanwhile, according to the leaching toxicity test on AOD slag and its cement test block, the leaching of total Cr and Cr^6＋ were both reduced to below the standard value. Thus, resource utilization of the treated stainless steel AOD slag can be realized.

关 键 词：不锈钢AOD渣 粉尘控制 胶凝活性 安定性 

分 类 号：X757[环境科学与工程—环境工程]