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我厂侧吹碱性转炉,不但可以将含磷高的生铁吹炼成合格的软钢,并用含磷不等的生铁炼出炭钢(中炭钢及高炭钢),炼炭钢的方法有两种:一为将炭去至最低,磷也合格后,再加入低硫低磷生铁水增炭;一为直接在炭火中收火留炭。炼成炭钢的温度可供浇铸机件,此外还能燥含锰14%的锰钢铸件,现分述如下:(一)铁水增炭法:采用生铁成分为 P1.2%±,Si1.1%,Mn>1.5%,S<0.06%,C3.5%,用普通吹炼高磷生铁为软钢的方法吹炼,其配加渣料为石灰220kg/T 铁水,铁屑25kg/T 铁水,铁矿石25kg/T 铁水,氟石为石灰之8%,吹炼至炭火下降后,再继续沉吹约1′左右,钢水中含磷已合格:P<0.03%,C0.04%,Mn0.10%,Si0.01%,然后停风,将低硫低磷生铁水倾入转炉中增炭。低硫低磷生铁水之成分为:C4.0%,Mn1.8%,
I plant the side of the basic converter, not only high-phosphorus pig iron can be blown into qualified mild steel, phosphorus and phosphorus ranging from pig iron refining carbon steel (carbon steel and high carbon steel), carbon steel method There are two: one is to go to the lowest carbon, phosphorus is also qualified, then add low-sulfur phosphorous-laden pig iron water; one for charcoal in the charcoal. Molten steel temperature for casting parts, in addition to dry 14% manganese manganese steel castings are as follows: (A) hot metal by carbon method: the composition of pig iron as P1.2% ±, Si1. 1%, Mn> 1.5%, S <0.06%, C3.5%, using ordinary blowing high-phosphorus pig iron as mild steel blowing method, with slag 220kg / T molten lime, iron 25kg / T Hot metal, iron ore 25kg / T hot metal, fluorite lime 8%, blowing down to charcoal, and then continue to sink about 1 ’, the phosphorus content of molten steel has passed: P <0.03%, C 0.04% , Mn0.10%, Si0.01%, and then stop the wind, the low sulfur phosphorous-containing pig iron into the converter in the charcoal. Low sulfur phosphorus phosphorus pig iron water composition: C4.0%, Mn1.8%