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应用数学模型和统计分析法，直接建立铁精矿（或烧结矿）品位的变化量与采矿、选矿、烧结和高炉各工序生产指标之间相互关系的经验式；以铁水的能值和单位生产费用为评价指标，提出了铁精矿合理品位的概念、评价准则和计算方法；以鞍钢为研究对象，给出了自熔性烧结矿的经济品位区是５６％～５８％。以铁精矿或烧结矿的经济品位组织选矿、烧结和高炉等工序的生产，则铁水的单位生产费用最低，单位能耗也很低。
The mathematical model and statistical analysis method are used to directly establish the empirical formula of the relationship between the variation of the grade of iron concentrate (or sinter ore) and the production indexes of each process of mining, beneficiation, sintering and blast furnace; The cost is the evaluation index, and the concept, evaluation criteria and calculation method of reasonable grade of iron concentrate are proposed. Taking Anshan Iron and Steel Company as the research object, the economic grade zone of self-fluxing sinter is 56% -58%. To iron ore ore or sinter economic grade organizations beneficiation, sintering and blast furnace processes such as production, the hot metal production costs per unit, the unit energy consumption is also very low.