论文部分内容阅读
经210加多炉的取消还原期炉外钢包喷粉精炼统计,我厂15T电炉的冶炼时间可缩短30分钟左右,节电80度/吨钢。精炼结果表明钢中的气体[H]、[O]和夹杂物的去除效果是相当显著的,[H]降到2～3ml/100克以下,[O]降到6～30ppm(浓差定氧),夹杂物的评级为1.5级以下,同时改变了夹杂物的形态。从经济效果来说,喷吹炭素钢时采用Si—Ca合金(3100元/T)成本上无收益。喷吹40Cr和40MnB可收益3—1元/吨钢。仅20CrMnTi钢冶炼中的Ti合金化,可以提高收得率2倍,降低成本9.6元/吨钢。本文将主要介绍采用CaO(16～20元/吨)基粉剂的精炼可能性及在15吨电炉中11炉精炼试验效果。它不仅可在现行工艺条件下,在钢包中脱硫20～30％,还能象Si—Ca一样改变钢中铝脱氧产物的形状,增大铝的脱氧能力。
After more than 210 plus furnace cancel reduction furnace ladle dusting refining statistics, I plant 15T smelting time can be shortened about 30 minutes, saving 80 degrees / ton of steel. The refining results show that the removal efficiencies of [H], [O] and inclusions in the steel are quite remarkable [H] down to 2-3ml / 100g and [O] down to 6-30ppm Oxygen), inclusion rating of 1.5 or less, while changing the morphology of inclusions. From the economic results, the injection of carbon steel with Si-Ca alloy (3100 yuan / T) no cost-benefit. Blowing 40Cr and 40MnB can benefit 3-1 yuan / ton of steel. Only 20CrMnTi Ti alloy steel smelting, can increase the yield 2 times, reduce the cost of 9.6 yuan / ton of steel. This article will mainly introduce the use of CaO (16 ~ 20 yuan / ton) powder refining possibilities and 11 furnace refining test results in 15 tons of electric furnace. It can not only desulfurize 20 ~ 30% in the ladle under the current process conditions, but also change the shape of the deoxidation product of aluminum in the steel like Si-Ca and increase the deoxidization ability of the aluminum.