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Production technology for melting steel by electric arc furnace converter

A production process and electric furnace technology, applied in the direction of electric furnace, process efficiency improvement, furnace, etc., can solve the problems of large scrap steel consumption, large power consumption, large electrode consumption, etc., and achieve low power consumption and small electrode consumption , the effect of reducing residual elements

Inactive Publication Date: 2005-03-23
NANJING NANGANG IND DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This commonly used production process is characterized by high power consumption, a large amount of scrap steel, and a large electrode consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Utilize the production technology provided by the present invention to carry out the smelting of 20# tube billet steel.

[0018] The electric arc furnace is a 100-ton ultra-high-power electric arc furnace. The proportion of molten iron in the furnace charge structure is 60%. The charging order of the furnace charge is primary scrap steel, primary molten iron, secondary molten iron, and secondary scrap steel. Add about 30 tons of light and thin material to the primary steel scrap, add about 10 tons of light and thin material to the secondary material, and add about 10 tons of crushed material. 3 , to increase the specific gravity of the pile and avoid pressing. Refractory steel scrap with large size such as tundish injection, briquetting and shearing materials cannot be used.

[0019] Oxygen supply system: Oxygen supply after the addition of molten iron, mainly furnace wall guns, control the total oxygen supply ≤ 600m 3 ; After the secondary molten iron i...

Embodiment 2

[0024] Embodiment 2: Utilize the present invention to smelt 45# steel.

[0025] The electric arc furnace is a 100-ton ultra-high-power electric arc furnace. The proportion of molten iron in the furnace charge structure is 65%. The charging order of the furnace charge is primary scrap steel, primary molten iron, secondary molten iron, and secondary scrap steel. Add about 25 tons of light and thin material to the primary scrap steel, add about 10 tons of light and thin material to the secondary material, and add about 10 tons of imported crushed material, the specification is 4t / m 3 , to increase the specific gravity of the pile and avoid pressing. Refractory steel scrap with large size such as tundish injection, briquetting and shearing materials cannot be used.

[0026] Oxygen supply system: Oxygen supply after the addition of molten iron, mainly furnace wall guns, control the total oxygen supply ≤ 600m 3 ; After the secondary molten iron is added, the flow rate of the main ...

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PUM

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Abstract

The invention relates to a kind of arc furnace converter steel-making technique, in the state of lacking electricity. The converter steel-making technique by using arc furnace is a kind of arc furnace converter steel-making technique of low electric power consumption and high ratio of molten iron enclosing, especially in the state of lacking electricity. Using small voltage progression, the system of oxygen blowing and loading materials realize the producing aim of arc furnace converter steel-making. The biggest advantage of the invention is that the production level can maintain normally though in the phase of low power utilization or break; avoid stop production because the break. In addition, because of the abundance low impurity content water, the ratio of iron and water arrive at above 55%; markedly decrease the residual element in the molten steel. The invention is low power consumption and electrode consumotion.

Description

technical field [0001] The invention relates to an electric arc furnace converter-based steelmaking production process, especially the production process of using an electric arc furnace for converter-based steelmaking operation under the condition of insufficient electric energy supply, and relates to the technical field of iron and steel smelting. Background technique [0002] In the case of sufficient electric energy supply, the commonly used production process of electric arc furnace smelting steel includes furnace charge loading, power supply, oxygen supply, slag making, steel tapping and other production processes. The main production process is cold charging, and the charge structure is mainly scrap steel. , supplemented by metal materials such as pig iron, scrap iron, mild steel, sponge iron, etc., and the scrap steel furnace material is loaded into the furnace in 2 to 3 times. Furnace cover, add 20-35t molten iron, energize the electrode to melt the furnace charge, ...

Claims

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Application Information

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IPC IPC(8): C21C5/52
CPCY02P10/20
Inventor 于小方林国强陈新华
Owner NANJING NANGANG IND DEV CO LTD
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