摘要
含钛矿高炉冶炼产生的高钛炉渣含有23%~25%的TiO_(2),为宝贵的钛资源,对其进行二次利用可弥补钛资源需求量增加和钛资源价格持续上涨的不足。其中含钛高炉渣的一种利用方式为与碳粉进行高温碳化反应,再氯化制得TiCl_(4)。总结了高钛型高炉渣与碳粉反应中促进碳粉高效利用的实践成果,并就碳粉加入方式对碳化反应的作用进行了分析讨论。实践表明,焦碳是一种高效的反应物,采用粒度<1 mm、占比>75%的细颗粒焦粉比焦丁更有利于提高碳粉利用率;提前配加碳粉具备非送电预反应的效果,可使反应时间提前25 min,产生的CO能强化冶炼的热力学、动力学条件;采用向炉内喷吹碳粉的方式可以使碳粉单耗降低18.6 kg/t渣,产品中游离碳降低3.95%,炉渣中TiO_(2)转化率提高1.35%,加料与输入功率的自动平衡使熔池热平衡维持稳定,有利于TiO_(2)与碳粉的充分反应,提高碳粉利用率。
The high titanium slag produced by smelting ilmenite containing blast furnace contains 23%~25%TiO_(2),which is a valuable titanium resource.Its secondary utilization can make up for the shortage of the increasing demand of titanium resource and the increasing price of titanium resource,one of the utilization methods of Ti-bearing blast furnace slag is carbonization reaction with carbon powder at high temperature,and then chlorination to produce TiCl_(4).This paper summarizes the practical results of promoting the efficient utilization of carbon powder in the reaction between high titanium blast furnace slag and carbon powder,and analyzes and discusses the effect of carbon powder addition on carbonization reaction.The practice shows that coke is an efficient reactant,and it is better to use fine coke powder with particle size less than 1mm and proportion more than 75%than coke ding to improve the utilization ratio of carbon powder,and adding carbon powder in advance has the effect of pre-reaction without power transmission,the reaction time can be advanced by 25 minutes,the CO produced can strengthen the thermodynamic and kinetic conditions of smelting,the carbon powder consumption can be reduced by 18.6 kg/t slag and the free carbon in the product can be reduced by 3.95%by injecting carbon powder into the furnace,the conversion of TiO_(2)in slag is increased by 1.35%,and the heat balance of molten pool is kept stable by the automatic balance of charge and input power,which is beneficial to the full reaction of TiO_(2)and carbon powder and the utilization of carbon powder.
作者
郭文明
龙飞虎
肖波
Guo Wenming;Long Feihu;Xiao Bo(Vanadium Extraction Steelmaking Plant of Panzhihua Iron and Steel Group Panzhihua Steel Vanadium Co.,Ltd.,Panzhihua 617000,Sichuan)
出处
《河北冶金》
2022年第10期21-24,53,共5页
Hebei Metallurgy
基金
国家重点研发计划(2018YFC1900500)。
关键词
高钛炉渣
碳粉
热平衡
利用率
热力学
high titanium slag
carbon powder
heat balance
utilization
thermodynamics
