渣料中石灰活性度对铁水脱硫的影响  

Effect of Activity of Lime in Slagging Materials on Desulfurization of Hot Metal

作　　者：郝素菊[1] 兰吉然 蒋武锋[1] 张玉柱[1,2] 郝华强[2] 

机构地区：[1]华北理工大学冶金与能源学院,现代冶金技术教育部重点实验室,唐山063009 [2]东北大学冶金学院,沈阳110004

出　　处：《特殊钢》2017年第2期16-18,共3页Special Steel

基　　金：国家自然基金项目(51174075,51274084);河北省自然科学基金项目(E2014209157);华北理工大学培育基金项目(GP201507)资助

摘　　要：煅烧石灰石制备260,401,397,383 mL四种活性度的石灰。试验铁水脱硫渣成分为(/%):35.18~44.84CaO,13.80~23.46S1O_2,18.98 Al_2O_3,9.49MgO,1.89Fe_2O_3,11.00CaF_2,碱度为1.5~3.25,铁水成分为(/%):4.53C,0.16Si,0.107S,0.099P。试验渣-铁比为7:100~15:100于电磁感应炉中在1 330~1 390℃进行脱硫实验。用荧光仪检测坩埚铁水中硫含量,并用全自动压汞仪测量石灰的比表面积和孔径分布。实验采用单一变量的方法,研究了石灰活性度,渣料碱度,熔炼温度,渣铁比对铁水脱硫的影响。实验表明,活性为397 mL的石灰比表面积较大,孔分布均匀,脱硫效果最好。在1 390℃、碱度为2.25、渣铁比为15:100的条件下,活性度为397 mL的石灰,铁水脱硫率可达到97.2%。The lime with 260, 401, 397 and 383 mL four kinds of activity is manufactured by calcined limestone. The ingredient of tested slag for desulphurization of hot metal is （/% ：） 35.18 - 44. 84CAO, 13.80 - 23.46SIO2, 18. 98A1203 , 9.49MgO, 1.89Fe203 , 11.00CaF2 with basicity 1.5 - 3.25, and the chemical composition of hot metal is （/% ： ） 4. 53C, 0. 16Si, 0. 107S, 0. 099P. The tested slag-metal ratio is 7：100 to 15：100 and the desulphurization test is in an induction furnace at 1 330 - 1 390 ℃. The sulphur content in metal in crucible is analyzed by a fluorescence analyzer, and the distribution of specific surface area and size of pore of lime are measured by an automate pressure mercury analyzer. The experiment is carried out by a single variable method to study the effect of slag basicity, melting temperature, slag-met- al ratio and activity of lime on desulphurization of hot metal. The test results show that the lime with activity 397 mL is larger specific surface area and more uniform pore distribution, it has best desulphurization effect. With slag basicity 2. 25, slag- metal ratio 15：100 and at 1 390 ℃ t, by using lime with activity 397 mL the desulphurization ratio of metal is up to 97. ：2%. Material Index Hot Metal, Desulphurization, Lime, Activity

关 键 词：铁水 脱硫 石灰 活性度 

分 类 号：TF704.3[冶金工程—钢铁冶金]