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Calculation method for controlling electric furnace smelting cost

A calculation method and electric furnace smelting technology, applied in the field of metallurgy, can solve problems such as affecting the accuracy of ingredients

Active Publication Date: 2019-11-22
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the diversity of scrap steel raw material structure, and the difference of scrap steel types will have a greater impact on power consumption, thereby affecting the problem of using a single scrap steel cost to optimize the accuracy of ingredients

Method used

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  • Calculation method for controlling electric furnace smelting cost
  • Calculation method for controlling electric furnace smelting cost
  • Calculation method for controlling electric furnace smelting cost

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Embodiment 1

[0120] Taking an 80t electric furnace in a steel factory to produce Q345 steel as an example, the traditional method and the optimized method of the present invention are used for batching, and the composition and price of scrap steel and alloy materials, as well as the electric energy consumption of scrap steel, are determined before the calculation of the optimal batching model of the present invention , at the same time determine the required value of the bulk density of scrap steel and its constraint range, and the target composition and constraint range of the target steel grade. Through the above constraint equation and objective function, use the simplex method to find the minimum value of the objective function when adding various types of scrap steel and alloys , and the results are shown in Table 1.

[0121] Table 1 Optimized ingredient scheme and cost analysis

[0122]

[0123] It can be seen from Table 1 that when the optimized batching model of the present inve...

Embodiment 2

[0125] Taking a 60t electric furnace in a steel factory to produce 45 steel as an example, the traditional method and the optimized method are used for batching, and the composition and price of scrap steel and alloy materials, as well as the electric energy consumption of scrap steel, are determined before the calculation of the optimal batching model of the present invention. Determine the required value of the bulk density of scrap steel and its constraint range, and the target composition and constraint range of the target steel grade. Through the above constraint equation and objective function, use the simplex method to find the addition amount of various types of scrap steel and alloys when the objective function is at a minimum. The results are shown in Table 2.

[0126] Table 2 Optimized ingredient scheme and cost analysis

[0127]

[0128] It can be seen from Table 2 that when the optimal batching model of the present invention is used for batching, the cost of sm...

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Abstract

The invention provides a calculation method for controlling the smelting cost of an electric furnace. The method comprises the following steps of: according to requirements of target components of a finished product, scrap steel bulk density, scrap steel element oxidation rate, alloy element yield, metal rate of metal materials and scrap steel bulk density, a finished product target component constraint equation, a scrap steel target bulk density constraint equation, a scrap steel and alloy quality constraint equation and an optimized batching target function are constructed, a linear programming mathematical model is constructed according to the equations, and the addition amount of scrap steel and alloy when the smelting cost is minimum are obtained through calculation. According to themethod, factors such as the burning loss rate of elements in the scrap steel, the alloy yield, the scrap steel density and the metal rate of metal raw materials in the smelting process are comprehensively considered; meanwhile, factor coefficients of different scrap steel types to electric energy consumption are introduced into an optimized batching objective function of the smelting cost, a comprehensive optimized batching model of the total cost of scrap steel, alloy and electric energy consumption is constructed, better applicability is achieved for a multi-element raw material structure, and the smelting cost of the electric furnace is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a calculation method for controlling the smelting cost of an electric furnace. Background technique [0002] Scrap steel is an important raw material for electric arc furnace steelmaking and the most important part of the total cost of steelmaking. In reality, there are many types of scrap steel used as raw materials, the composition and density fluctuate greatly, and the price gap is also large. At present, the domestic supply of scrap iron and steel still cannot effectively meet the demand of the steel market, and the price of scrap iron and steel has been at a high level. Therefore, the scientific proportioning of steel scrap is an important link to realize the reduction of the cost per ton of steel in electric furnace steelmaking. It is mainly based on the technical requirements of smelting steel types and smelting process requirements, reasonably matching va...

Claims

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Application Information

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IPC IPC(8): G06Q30/02G06Q10/04G06Q10/06C21C5/52
CPCG06Q30/0206G06Q10/04G06Q10/06395C21C5/52Y02P10/20
Inventor 操龙虎徐永斌
Owner WISDRI ENG & RES INC LTD
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