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Energy input control method for electric-arc furnace smelting

A technology of energy input and control method, which is applied in the direction of electrical program control, electric furnace, program control in sequence/logic controller, etc. It can solve the problems of unreasonable power supply system, poor economy, radiation hazard of electric furnace lining, etc., and achieve reasonable power supply system, good adaptability, and the effect of reducing severe radiation

Active Publication Date: 2021-04-06
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an energy input control method for electric arc furnace smelting in view of the lack of manual experience in the power supply system in the current electric arc furnace smelting, which can overcome the poor economy and damage to the lining of the electric arc furnace caused by the unreasonable power supply system brought about by manual experience. Radiation hazards and other issues, at the same time a reasonable power supply system also helps to improve smelting efficiency and save energy and reduce consumption

Method used

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  • Energy input control method for electric-arc furnace smelting
  • Energy input control method for electric-arc furnace smelting
  • Energy input control method for electric-arc furnace smelting

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Embodiment 1

[0035] Taking the 120t electric furnace of a steel factory as an example, the electric furnace is equipped with a 90MVA transformer, and the electric furnace steelmaking power supply system based on conventional manual experience and the optimized energy input control method of the electric arc furnace smelting of the present invention are respectively adopted. Table 1 shows the comparison results of the economic indicators of the two power supply systems for electric furnace smelting.

[0036] Table 1:

[0037]

[0038] As can be seen from Table 1, after using the power supply system obtained by the energy input control method for electric arc furnace smelting of the present invention to carry out electric furnace smelting, the smelting cycle of the electric furnace is reduced by 3.4min, and the power consumption per ton of steel is reduced by 18kWh. The efficiency has been improved, and the utilization rate of the transformer has been significantly improved.

Embodiment 2

[0040]A 100t electric furnace in a steel plant is smelted with a scrap-direct reduced iron raw material structure. The electric furnace is equipped with an 80MVA transformer, and the current conventional manual experience-based power supply system for electric furnace steelmaking and the energy input control method for electric arc furnace smelting of the present invention are respectively adopted The obtained optimized power supply system is used for electric furnace smelting, and the comparison results of the economic indicators of the two power supply systems are shown in Table 2.

[0041] Table 2:

[0042]

[0043] As can be seen from Table 2, after using the power supply system obtained by the energy input control method for electric arc furnace smelting of the present invention to carry out electric furnace smelting, the smelting cycle of the electric furnace is reduced by 5.5min, and the power consumption per ton of steel is reduced by 26.4kWh, and the power factor an...

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Abstract

The invention provides an energy input control method for electric-arc furnace smelting. The method includes the steps of firstly, determining transformer capacity and reactor capacity required by electric-arc furnace smelting, simultaneously determining short network design parameters according to the furnace capacity of an electric-arc furnace, and then determining the optimal working current under different voltages and reactor capacities according to a power supply system model on the basis of the determined short network design parameters, selecting power supply schemes in different stages according to the abrasion index of a refractory material in an arcing stage and arc length constraint conditions required by foam slag submerged arc in an oxidation stage; and finally, determining the electric energy consumption in each stage through material balance and heat balance calculation, feeding back to the power supply schemes in different stages, and calculating the power supply time in different stages. According to the energy input control method for electric-arc furnace smelting, a manual experience operation mode in a traditional electric furnace smelting process is changed, and the method has good adaptability to various raw material structures, so that the problem that the smelting period is too long and electric energy consumption is high is solved, and a more reasonable power supply system can be obtained.

Description

technical field [0001] The invention belongs to the technical field of electric furnace steelmaking, and in particular relates to an energy input control method for electric arc furnace smelting. Background technique [0002] In recent years, the iron and steel industry has vigorously promoted supply-side structural reforms, and the quality of industry development has improved. However, problems such as the incoordination between the layout of the iron and steel industry and the environmental carrying capacity have become increasingly prominent. With the continuous increase of scrap steel resources accumulated in our society, the power supply is more reorganized, the rational use of scrap steel resources, and the orderly development of short-process steelmaking processes in electric arc furnaces have become the target direction for the steel industry to achieve structural optimization. At present, my country's short-process steelmaking process accounts for only about 10%, wh...

Claims

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Application Information

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IPC IPC(8): C21C5/52G05B19/04
CPCC21C5/52G05B19/04Y02P10/20
Inventor 操龙虎徐永斌成剑明陈洪智李伟坚
Owner WISDRI ENG & RES INC LTD