复吹转炉氧枪喷吹石灰石颗粒的物理模拟

建立了氧枪喷吹石灰石粉的冷态模型，用水模拟钢水，用浸盐空心三氧化二铝模拟石灰石粉，用真空泵油模拟炉渣，研究了熔池的均混时间、粉剂分布和粉剂穿透比.考察了底气流量和枪位对均混时间的影响，同时在优化的工艺条件下，测定了熔池的粉剂穿透比和粉剂分布，确定了实验室条件下最佳操作工艺.结果表明，顶吹喷粉条件下氧枪枪位应略微下降，枪位为258mm，底气流量为20m3/h;粉剂穿透比随固气比和粉剂粒度的增加而增加，确定了实验条件下最佳粉剂粒度为0212~0380mm.

Physical Simulation of BOF Limestone Particles Blowing via Top Lance

A cold model of BOF limestone particles blowing via top lance was established to investigate the mixing time， powder distribution and penetration ratio in the melt bath. Water， salt coated hollow alumina particles and vacuum pump oil were used to simulate liquid steel， limestone particles and slag， respectively. The effects of gas flow and the lance position on the mixing time were studied， and the optimum process in the test condition was determined. The penetration ration and the powder distribution were measured under the optimum processing condition. The results showed that the powder penetration ratio increases with the increase of solid/gas ratio and powder particle size. The lance position under the top blowing spray condition slightly lowers to the height of 258mm， botton blowing rate is 20m3/h.Under the laboratory condition， the powder particle size 0212~0380mm are suggested.