Method for producing iron-chromium electrothermal alloy with scrap iron

A technology of electric heating alloy and scrap iron, which is applied in the field of alloy materials, can solve the problems of limiting the scope of use and shortening the service life, etc., and achieve the effects of improving oxidation resistance, improving fast life, and improving bonding strength

Inactive Publication Date: 2017-06-06
当涂县宏宇金属炉料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only limits the scope of use, but also seriously shortens the service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for producing iron-chromium electric heating alloys from scrap iron, comprising the following steps:

[0017] (1) take by weight the scrap iron of 62% and the ferrochrome of 38%;

[0018] (2) Carry out smelting, the smelting temperature is more than 1700 ℃, so that iron scrap and ferrochrome are melted into molten steel, and then nitrogen is blown to the bottom of the molten steel;

[0019] (3) Adjust the temperature of the molten steel to 1450°C, then add the dephosphorizing agent to the molten steel, and add the desulfurizing agent after 15 minutes. The amount of dephosphorizing agent added is controlled at 5kg / t molten steel, and the amount of desulfurizing agent added is controlled at 6kg / t Molten steel is subjected to dephosphorization and desulfurization treatment;

[0020] (4) Carry out refining, adjust the oxygen supply intensity and carry out decarburization treatment, when the carbon content is lower than 0.02%, stop the oxygen supply, add trace elem...

Embodiment 2

[0022] A method for producing iron-chromium electric heating alloys from scrap iron, comprising the following steps:

[0023] (1) take by weight the scrap iron of 64% and the ferrochrome of 36%;

[0024] (2) Carry out smelting, the smelting temperature is more than 1700 ℃, so that iron scrap and ferrochrome are melted into molten steel, and then nitrogen is blown to the bottom of the molten steel;

[0025] (3) Adjust the temperature of the molten steel to 1450°C, then add the dephosphorizing agent to the molten steel, and add the desulfurizing agent after 15 minutes. The amount of dephosphorizing agent added is controlled at 6kg / t molten steel, and the amount of desulfurizing agent added is controlled at 7kg / t Molten steel is subjected to dephosphorization and desulfurization treatment;

[0026] (4) Carry out refining, adjust the oxygen supply intensity and carry out decarburization treatment, when the carbon content is lower than 0.02%, stop the oxygen supply, add trace elem...

Embodiment 3

[0028] A method for producing iron-chromium electric heating alloys from scrap iron, comprising the following steps:

[0029] (1) take by weight the scrap iron of 65% and the ferrochrome of 35%;

[0030] (2) Carry out smelting, the smelting temperature is more than 1700 ℃, so that iron scrap and ferrochrome are melted into molten steel, and then nitrogen is blown to the bottom of the molten steel;

[0031] (3) Adjust the temperature of molten steel to 1450°C, then add dephosphorization agent to molten steel, add desulfurization agent after 15 minutes, control the amount of dephosphorization agent added at 7kg / t molten steel, and control the amount of desulfurizer added at 8kg / t Molten steel is subjected to dephosphorization and desulfurization treatment;

[0032] (4) Carry out refining, adjust the oxygen supply intensity and carry out decarburization treatment, when the carbon content is lower than 0.02%, stop the oxygen supply, add trace elements in the refining process, the...

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PUM

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Abstract

The invention belongs to the technical field of alloy materials, and particularly relates to a method for producing iron-chromium electrothermal alloy with scrap iron. The method includes the steps of matching, smelting, desulfurization and dephosphorization, and refining. According to the method for producing the iron-chromium electrothermal alloy with the scrap iron, cost is low, and the scrap iron can be recycled and treated; moreover, a desulfurizing agent and a dephosphorization agent prepared through the method are used for desulfurization and dephosphorization at a high temperature, and the influence on electrothermal performance of the iron-chromium alloy can be greatly increased; and in the refining process, silicon, molybdenum, vanadium and cobalt at a certain mass ratio are added, and the quick life of iron-chromium-aluminum alloy at the high temperature is prolonged.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a method for producing iron-chromium electrothermal alloys from scrap iron. Background technique [0002] Iron-chromium-aluminum alloy is a widely used electric furnace wire material. It has high resistivity, light specific gravity, strong oxidation resistance and carburization resistance, and low price. Generally, the use temperature is 300°C higher than that of nickel-chromium electric furnace wire, but it can be used at high temperature. It will become brittle afterwards. This not only limits the scope of use, but also seriously shortens the service life. [0003] Therefore, how to develop iron-chromium-aluminum alloys with low cost, fast heating and long service life has always been a research hotspot in this field. The recycling and application of scrap iron has always been an effective way to reuse industrial resources, which can greatly improve the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C21C7/068C21C7/064C22C38/22C22C38/24C22C38/30C22C38/02
CPCC21C7/0006C21C7/0645C21C7/068C22C33/06C22C38/02C22C38/22C22C38/24C22C38/30Y02P10/20
Inventor 芮德发
Owner 当涂县宏宇金属炉料有限责任公司
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