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我们在去磷方面,根据生铁中不同的含磷量,经过不断的改进,严格的控制着熔渣的碱度、氧化铁含量和渣量等,使其去磷效率逐渐提高,操作中的主要情况如下:(一)生铁成分:炼钢生铁:我厂使用的碱性炼钢生铁系用含磷高、含铁低的贫矿炼成的,含磷量在0.4—1.98%,一般在1.2—1.3%。(1)一般生铁成分:P Si Mn S C1.2%± 1.0—1.1%>1.5%<0.06% 3.8%±(2)铁水温度:一般在1350—1400℃。(二)吹炼方法:我们吹炼高磷生铁最主要的办法,就是强化去磷作用,无论是吹炼含磷1.0%、1.5%或1.9%和采用三批料、二批料加入法,或采用吹炼后期面吹或沉吹,而在前期吹炼(炭火焰降落前)都要严格的掌撑着面吹和造成一个渣量一定,碱度、氧化铁含量适当,流动性良好的渣子,使其在吹炼的全部过程中都发生
In terms of dephosphorization, according to the different phosphorus content in pig iron, through continuous improvement, strict control of slag alkalinity, iron oxide content and slag, etc., to gradually improve the efficiency of dephosphorization, the operation of the main The situation is as follows: (a) pig iron composition: steelmaking pig iron: I plant the use of alkaline steelmaking pig iron with phosphorus, iron low lean ore refining, phosphorus content of 0.4-1.98%, generally 1.2 -1.3%. (1) General pig iron composition: P Si Mn S C1.2% ± 1.0-1.1%> 1.5% <0.06% 3.8% ± (2) Hot metal temperature: generally 1350-1400 ° C. (B) blowing method: Our main method of blowing high-phosphorus pig iron is to strengthen the role of dephosphorization, whether it is blowing phosphorus 1.0%, 1.5% or 1.9% and the use of three batches of material, two batches of material into the law, Or the use of blowing or sink blowing blow after blowing, and in the pre-blowing (charcoal flame before landing) have to hold the palm solemn blow and cause a certain amount of slag, alkalinity, iron oxide content is appropriate, good liquidity Dross, so that it occurs in the whole process of blowing