The utility model relates to a control method for smelting high phosphorus and titanium hot metal carbon retaining tapping in a converter, belonging to the technical field of steel making. The application of active lime and ore based slag, the activity of ash content is more than 85% CaO. The converter uses slag remaining + single slag operation method. The slag remaining in converter is operated according to the total slag quantity of 1/2 to 1/3, and the converter load is produced according to 90% molten iron +10% scrap model. The concrete operation process of converter smelting is divided into two parts: the first part is the converter smelting operation; the second part is the separation of slag and iron during the tapping process. Has the advantages of solving high phosphorus containing titanium iron smelting slag pre sticky, slag iron separation effect is poor, the problem of pre slag dephosphorization effect is poor, to achieve the purpose of protection of carbon steel smelting, removal of titanium in molten steel into most of slag, the slag content is 3.6 ~ 5% TiO2. The application of active lime and ore based slag, the activity of ash content is more than 85% CaO.
【技术实现步骤摘要】
一种转炉冶炼高磷含钛铁水保碳出钢的控制方法
本专利技术属于炼钢
,特别涉及一种转炉冶炼高磷含钛铁水保碳出钢的控制方法。
技术介绍
正常铁水的钛含量在0.10%左右,对转炉冶炼没有影响。转炉在冶炼含钛、铬、钒等元素的铁水(Ti(0.10~0.50%)、Cr(0.10~0.20%)、V(0.05~0.10%))等高温元素时,尤其高磷、高钛铁水(P≥0.12%;Ti≥0.20%)时,转炉前期渣过粘、渣铁分离效果差,中前期渣脱磷效果差;转炉后期脱磷负担重,若操作不当经常出现喷溅和黏结粘枪等事故,钢铁料消耗技术指标恶化;终渣氧化性高、侵蚀炉底,溅渣护炉效果差和炉龄降低等一系列问题,严重影响到转炉的生产正常运行。根据Ellingham氧位图铁水中Ti最先被氧化,其次是Si、V、Mn、Cr、P、S等元素。为消除铁水中的Ti、Cr、V对后续炼钢的影响,希望铁水中的Ti、V、Cr元素尽量氧化进入渣中,倒炉时去除。同时,又要保证铁水中的碳少氧化,以保证下一步半钢吹炼过程中有足够的热量。要解决“去钛保碳”问题,就要创造条件:前期渣的流动性要好,熔点低、渣钢分离良好,易于转炉倒渣操 ...
【技术保护点】
一种转炉冶炼高磷含钛铁水保碳出钢的控制方法,其特征在于,工艺步骤如下:(1)转炉炼钢操作转炉冶炼第一阶段:0~11min之间,以3.1Nm
【技术特征摘要】
1.一种转炉冶炼高磷含钛铁水保碳出钢的控制方法,其特征在于,工艺步骤如下:(1)转炉炼钢操作转炉冶炼第一阶段:0~11min之间,以3.1Nm3/min/t的供氧强度吹炼,向转炉内加入活性石灰、矿石造渣剂占总渣量的70~80%,采用较大的底吹流量搅拌;枪位按照1.8m-1.2m逐渐降低控制转炉吹炼第二阶段,11~14min之间,以3.3Nm3/min/t的供氧强度吹炼,在总吹炼氧耗的80%~90%内,多批少量加入矿石;采用较小底吹流量;氧枪枪位按照1.2~1.0m控制;转炉吹炼结束,转炉摇炉倒渣、测温、取样;转炉准备出钢;(2)出钢过程渣铁分离操作终点倒炉操作:温度按1590℃~1640℃控制,出钢碳含量...
【专利技术属性】
技术研发人员:孔祥涛,李正嵩,孙齐松,周德,伍从应,曾圣明,杨龙飞,刘珂,刘占林,江金东,王勇,丁宁,郑家良,
申请(专利权)人:首钢总公司,
类型:发明
国别省市:北京,11
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