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Process method for smelting stainless steel mother liquor with electric furnace and stainless steel mother liquor

A process method and electric furnace smelting technology, applied in the field of technology, can solve the problems of high metal material consumption, high electric furnace power consumption, and high electrode consumption, and achieve the effects of improving production efficiency, reducing production costs, and reducing smelting power consumption.

Active Publication Date: 2019-11-12
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The short-process electric furnace stainless steel production process using all scrap steel as return material is now widely used in the field of stainless steel production. There are problems such as high metal material consumption, high electric furnace power consumption, high electrode consumption, long smelting time and shortened furnace life.

Method used

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  • Process method for smelting stainless steel mother liquor with electric furnace and stainless steel mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment is to use the method for smelting stainless steel mother liquor by electric furnace of the present invention to smelt 40Cr13 stainless steel, and what the invention adopted is 40 tons of EAF electric arc furnace.

[0030] First load 32kg / t of lime into the bottom of the electric furnace, and then load 300kg / furnace scrap steel cutting slag into the bottom of the material column, containing 55% of 40Cr13 series stainless steel and similar steel types, 33% of carbon scrap steel, and 12% of high Carbon ferrochrome is loaded into the material column at one time according to the principle of dense pressing, loose top, high middle, low surrounding, and no large material at the furnace door. Among them, large steel scrap with a cross-sectional area of ​​furnace charge of about 600mm×600mm accounts for 20%, and the cross-sectional area is 250mm ×250mm~600mm×600mm medium steel scrap accounted for 40%, and other small steel scrap accounted for 40%; ingredient compo...

Embodiment 2

[0034] This embodiment is to use the method for smelting stainless steel mother liquor by electric furnace of the present invention to smelt 40Cr13H stainless steel, and what the invention adopted is 40 tons of EAF electric arc furnace.

[0035] First load 34kg / t of lime into the bottom of the electric furnace, and then load 280kg / furnace scrap cutting slag into the bottom of the material column, containing 60% of 40Cr13 series stainless steel and similar steel types, 28% of carbon scrap, 10% of high Carbon ferrochrome is loaded into the material column at one time according to the principle of dense pressing, loose top, high middle, low surrounding, and no large material at the furnace door. Among them, large steel scrap with a cross-sectional area of ​​furnace charge of about 600mm×600mm accounts for 25%, and the cross-sectional area is 250mm ×250mm~600mm×600mm medium steel scrap accounted for 45%, and other small steel scrap accounted for 30%; ingredient composition C: 0.97%...

Embodiment 3

[0039] This embodiment is to use the method for smelting stainless steel mother liquor by electric furnace of the present invention to smelt 40Cr13HL stainless steel, and what the invention adopts is 40 tons of EAF electric arc furnace.

[0040] First load 36kg / t of lime into the bottom of the electric furnace, and then load 250kg / furnace scrap cutting slag into the bottom of the material column, containing 65% of 40Cr13 series stainless steel and similar steel types, 27% of carbon scrap, 8% of high Carbon ferrochrome is loaded into the material column at one time according to the principle of dense pressing, loose top, high center, low surrounding, and no large material at the furnace door. Among them, large steel scrap with a cross-sectional area of ​​furnace charge of about 600mm×600mm accounts for 30%, and the cross-sectional area is 250mm ×250mm~600mm×600mm medium steel scrap accounted for 50%, and other small steel scrap accounted for 20%; ingredient composition C: 1.17%,...

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Abstract

The invention discloses a technology method for smelting stainless steel mother liquor through an electric furnace and stainless steel mother liquor smelted through the technology method, belongs to the technical field of metal smelting technology design and construction and provides the technology method for smelting stainless steel mother liquor through the electric furnace and the stainless steel mother liquor smelted through the technology method, accordingly, the smelting time is obviously shortened, the smelting power consumption is relatively low, and electrode consumption is relatively low. According to the technology method, return scraps, carbon waste steel, high carbon ferro-chrome and waste steel cutting slag of 40Cr13 series stainless steel and similar steel types are adopted as smelting raw materials, reduction is conducted through a reducing agent under the fusion condition in the electric furnace through oxygen blowing melting acceleration and oxygen blowing decarburization. The smelting raw materials are smelted into the stainless steel mother liquor comprising 0.36%-0.45% of C, 0.30%-0.60% of Si, 0.30%-0.80% of Mn, smaller than or equal to 0.030% of P, smaller than or equal to 0.015% of S, 12.50%-14.00% of Cr and the balance iron and impurities.

Description

technical field [0001] The invention relates to a process method, in particular to a process method for smelting stainless steel mother liquor with an electric furnace, and belongs to the technical field of metal smelting process design and construction. Background technique [0002] Stainless steel has many excellent properties, beautiful appearance, long service life, and can be 100% recycled, so it can be widely used, and the demand for stainless steel is also increasing day by day. At present, there are three methods for smelting stainless steel in the world, namely, one-step method, two-step method and three-step method. The two-step stainless steel smelting process accounts for about 70% of the world's stainless steel production capacity. Among them, the EAF furnace is mainly used to melt scrap steel and alloy raw materials to produce stainless steel mother liquor, which then enters the AOD furnace to smelt qualified stainless steel molten steel. The short-process ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52C21C7/068C22C33/06C22C38/02C22C38/04C22C38/18
CPCC21C5/005C21C7/0685C22C33/06C22C38/02C22C38/04C22C38/18Y02P10/20
Inventor 蒋世川张健陈琦付建辉
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD