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在转炉中用低磷铁水冶炼不锈钢与高碳钢时,由于炉内温度不够,常需加入焦粉以弥补热量不足。但是,加入焦粉会增加转炉的吹炼时间与钢水中的含硫量,且无法用于冶炼吹炼后期不能还原脱硫的钢种。针对这种情况,日本川崎制铁公司千叶厂研制成一种促进顶底吹转炉二次燃烧的技术,并取得了很好的效果。该厂在其85吨K-BOP转炉三孔拉瓦尔氧枪上加置了促进炉内二次燃烧的直管式PC喷咀。吹炼中主枪吹氧为1.45标米~3/吨·分,
In the converter with low phosphorus hot metal smelting stainless steel and high carbon steel, the furnace temperature is not enough, often need to add coke powder to make up for lack of heat. However, the addition of coke powder will increase the blowing time of the converter and the sulfur content in the molten steel, and can not be used for smelting steel grades that can not be desulfurized in the late stage of the blowing. In response to this situation, Kawasaki Chiba Kawasaki factory developed a technology to promote top-bottom converter secondary combustion technology, and achieved good results. The plant added a straight-tube PC nozzle for secondary combustion in the furnace to its 85-ton K-BOP converter three-hole Laval oxygen gun. The main gun in the blowing oxygen blowing is 1.45 standard meters ~ 3 / t · min,