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此文对目前冲天炉分析法与图解法配料计算进行了仔细的分析,找到生产上不能使用的原因。分析法存在的问题是不能保证铁水要求之碳量。该法使用求钢量x的公式x=C_Ⅲ-C铁/C钢-C铁,在三种以上炉料时铁料碳量C铁,在炉料配比未定以前定不下来,自然x也求不出结果,只用Si、Mn列方程式,计算结果只能满足Si和Mn。但是铁水碳量是必须要保证的,因为碳量除用调正炉料配比满足以外没有剐的办法。碳量得不到保证,这是目前分析法存在的关键问题。目前分析法还介绍用P、S列方程式,也是用不得的,因为这样很容易使有害杂质S、P超差,所以必须修正。用C、Si、Mn元素列方程式,用P、S不等式复核,用C、Si、Mn方程组求得结果满足铁水C、Si的要求,用P、S不等式复核,小于规定的含量即可。图解法是以分析法为理论基础的。用Si、Mn座标系来进行图解,当然只能满足铁水要求之Si、Mn含量,碳量不能保证,所以计算无效,必须进行修正。使用C—Si或C—Mn座标系,图解结果满足铁水的C、Si或C、Mn,得不到满足的Mn或Si可用外加Mn—Fe或Si—Fe办法来调正。
This paper analyzes the current cupola analysis and graphical analysis of ingredients carefully analyzed to find the reasons for the production can not be used. Analysis of the existing problems is not guaranteed that the amount of carbon required for hot metal. The method uses the formula for obtaining the amount of steel x x = C_Ⅲ-C iron / C steel-C iron, when in more than three kinds of charge iron iron content C iron, fixed in the charge before the ratio is not fixed, natural x also seek The results, only Si, Mn column equation, the results can only meet the Si and Mn. However, the amount of hot metal carbon must be guaranteed, because the amount of carbon addition to adjust the charge ratio to meet the other than no solution. The amount of carbon can not be guaranteed, which is the key issue of the current analytical method. The current analytical method is also introduced with P, S column equations, but also useless, because it is easy to make harmful impurities S, P ultra-poor, it must be amended. C, Si, Mn elements of the formula, with P, S inequalities review, with C, Si, Mn equations to meet the results of the molten iron C, Si, with P, S inequalities review, less than the required content can be. Schematic analysis is based on the theory of law. With Si, Mn coordinate system for graphic, of course, only meet the requirements of molten iron Si, Mn content, carbon can not be guaranteed, so the calculation is invalid, must be amended. Using C-Si or C-Mn coordinate system, the results meet the C, Si or C, Mn of molten iron. Unacceptable Mn or Si can be adjusted by adding Mn-Fe or Si-Fe.