铁水包喷吹Mg＋CaO粉剂脱硫技术

Desulfurization technology by using Mg+CaO powder injection in hot metal ladle

分析了宝山钢铁股份有限公司采用TDS（Torpedo Car Desulphurization）、PTC（Hot Metal Pretreatment Center）和铁水包单枪、双枪喷Mg＋CaO脱硫模式的生产情况。结果表明，采用铁水包喷吹Mg＋CaO脱硫在喷吹时间、脱硫效果、粉剂消耗、生产组织及经济效益等方面明显优于混铁车喷吹脱硫。脱硫时间可缩短50％以上，终点硫质量分数可达到0．001％～O．003％，粉剂总耗量仅为CaC2基粉剂耗量的50％、CaO基粉剂耗量的20％，综合成本比TDS或PTC混铁车脱硫低18％～30％。铁水罐双枪喷Mg＋CaO脱硫模式的效果最好。

The hot metal desulfurization processes including TDS （Torpedo Car Desulphurization）, PTC （Hot Metal Pretreatment Center） and single lance and double lances desulfurization in a hot metal ladle at Baosteel are analyzed. It＇s shown that the desulphurization process of Mg ＋ CaO powder injection into a hot metal ladle is prominently superior over the powder-injection desulhurization process in a torpedo car in the fields of injection duration, desulphurization effects, powder consumption, production organization and economic efficiencies. The injection duration for desulphurization can be reduced by over 50%, the end point sulphur content up to 0. 001-0. 003%, the total powder consumption only 50% as much as the total consumption of CaC2 powder and 20% of CaO powder and the composite cost of this desulphurization process 18%-30% lower than that by TDS and PTC in a torpedo car. The desulphurization mode of Mg ＋ CaO powder injection into the hot metal ladle with a double lance is the best one.