未燃煤粉及其还原产物在高钛型高炉渣中的行为研究  

Study on the behavior of unburnt pulverized coal and reduction productions of TiO_(2) in high-titanium blast furnace slag

作　　者：谢洪恩[1] 郑魁 胡鹏[1] 唐文博[1] 令新科 Xie Hong’en;Zheng Kui;Hu Peng;Tang Wenbo;Ling Xinke(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000

出　　处：《钢铁钒钛》2024年第6期119-126,共8页Iron Steel Vanadium Titanium

摘　　要：采用旋转柱体法对配加未燃煤粉的高钛型高炉渣的黏度进行了测量,结合试验样品的宏观形貌和不同部位微观结构的表征,对未燃煤粉及其还原产物在高钛型高炉渣中的行为进行了分析。结果表明,未燃煤粉不可避免地会与渣中TiO_(2)反应,残余的未燃煤粉及其还原产物,如Ti(C,N)或TiC_(x)O_(y)等高熔点物相不均匀分布于渣中。随着初始未燃煤粉含量从0增加至5.51%,渣中TiC和TiN含量之和从0.456%升高至2.515%,反应生成的高熔点物质向下沉降聚集,残余的未燃煤粉则向上运动,与上部炉渣中的TiO_(2)继续反应生成高熔点物质或形成泡沫渣,并导致炉渣黏度显著升高,波动显著加剧,炉渣中部则几乎没有残余未燃煤粉和高熔点还原产物。In this study,the viscosity of high-titanium blast furnace slags uniformly mixed with unburnt pulverized coal(UPC)was measured by using the method of rotating cylinder firstly.Then the distribution and behavior of the residual UPC and the reduction products were analyzed according to the macro morphology of these samples and their microscopic morphology of different parts.It was found that TiO_(2) would inevitably be reduced by UPC,the high melting point reduction products such as Ti(C,N),TiC_(x)O_(y) and unburnt UPC distributed nonuniformly in the slag.As the initial UPC content increased from 0%to 5.51%,the total content of TiC and TiN increased from 0.456%to 2.515%.The high melting point reduction products deposited downwards and aggregated,while the unburnt UPC floated upwards and continued to react with TiO_(2) to form foam slag,resulting in a significant increase in both viscosity and its fluctuation.However,there were negligible residual unburnt UPC and high melting point reduction products in the middle of the slag.

关 键 词：高钛型高炉渣 未燃煤粉 还原行为 黏度 碳氮化钛 

分 类 号：TF533[冶金工程—钢铁冶金]