MATHEMATICAL MODELING AND OPTIMIZATION OF TECHNICAL AND ECONOMIC INDICATORS OF PRODUCTION AND USE OF METALLISED MOLYBDENUM CONCENTRATE
Abstract
In the work, a study of technical and economic indicators of an active industrial experiment of smelting and using metallized molybdenum concentrate (spongy ferromolybdenum) was carried out. In domestic practice, the technology for the production of a new alloying material based on molybdenum in mine electric furnaces was developed and exploited for a long time and was optimized. A mathematical model of technical and economic indicators was developed, taking into account the largest number of technological factors. The result of mathematical modeling is a multifunctional indicator system. The limits of production indicators and expenditure coefficients of bulk materials were established and optimized, which made it possible to stabilize the quality of the target product.In the performed assessment of end-to-end economic efficiency when obtaining a new alloying material, there is a reduction in the cost of production technology and a reduction in expenditure ratios. In the assessment methodology, not only the general recommendations of the ratio were used, but also the original factors that were developed in actual work. In the efficiency assessment calculations, an improved technique was used with the specification of the relevant coefficients and prices for such materials as standard ferromolybdenum FMo52…FMo60, molybdenum concentrate of grades KMo1…KMo3, FMoG1…FMoG3 and steel P6M5.The new alloying material based on molybdenum FMoG differs from traditional ferroalloys smelted by ore or metalothermic methods by favorable technical and economic indicators: 7-8 times higher rate of assimilation of molybdenum by molten steel, reduction of oxidation potential during alloying – assimilation of chromium, molybdenum and vanadium increases by 4-10%.On the example of the production and use of spongy ferromolybdenum for steel alloying, an economic efficiency assessment was performed, which confirms the expediency and perspective of using alloying materials based on refractory elements in metallurgy.
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