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Pure iron smelting method

A smelting method and pure iron technology, which is applied in the field of ferrous metal smelting, can solve the problems of inability to remove various impurities in converter steelmaking smoke and dust, large investment in production equipment, complicated process flow, etc. It is easy to achieve smelting scale, stable product quality, The effect of short process flow

Inactive Publication Date: 2003-03-19
攀枝花市永禄科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this process, the converter steelmaking dust cannot be used as raw material to smelt pure iron, because this process cannot remove various impurities in the converter steelmaking dust
The disadvantages of this process are large investment in production equipment, complex process flow, many auxiliary materials, high production cost, and scrap steel cannot be used as raw material.

Method used

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Experimental program
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Effect test

Embodiment 1

[0034] A pure iron smelting method of the present invention, its process flow diagram is as shown in the accompanying drawing.

[0035] Raw materials: 540kg of converter steelmaking dust. Slagging material: soda ash (NaHCO 3 ) 4.0kg, quicklime (CaO) 4kg, namely NaHCO 3 :CaO=1:1. Deoxidizer: aluminum bar 3kg. Smelting equipment: a medium frequency induction furnace with a total capacity of 700kg. There are 10 steel ingot molds and one ladle for injection molding.

[0036] Smelting process:

[0037] Firstly, put 270kg of converter steelmaking dust into the intermediate frequency induction furnace, turn on the electricity to raise the temperature, and when the materials start to melt, add 2.0kg of quicklime and 2.0kg of soda ash into the intermediate frequency induction furnace, continue to turn on the electricity to heat up, so that the materials in the furnace are melted. Stir continuously during the cooking process. After about 20 minutes, the materials in the furnace ar...

Embodiment 2

[0041] A pure iron smelting method of the present invention, its process flow diagram is as shown in the accompanying drawing.

[0042] Raw materials: 230kg of scrap steel, 230kg of converter steelmaking dust, that is, the weight ratio of converter steelmaking dust: scrap steel=1:1. Slagging material: CaO 9.0kg, NaHCO 3 4.5kg, namely CaO: NaHCO 3 =2:1. Deoxidizer: aluminum bar 3kg. Smelting equipment: 1 industrial frequency induction furnace with a total capacity of 500kg.

[0043] Smelting process:

[0044] Impurities

Embodiment 3

[0046] A pure iron smelting method of the present invention, its process flow diagram is as shown in the accompanying drawing.

[0047] Raw materials: 225 kg of steel scrap, 265 kg of dust from converter steelmaking, that is, the weight ratio of dust from converter steelmaking: scrap steel = 1.177:1. Slagging material: NaHCO 3 4.0kg, CaO 12kg, namely NaHCO 3 :CaO=1:3. Deoxidizer: aluminum bar 3kg. The smelting equipment is basically the same as in Embodiment 2.

[0048] Smelting process:

[0049] Take 25kg of scrap steel, 65kg of converter steelmaking dust, 4.5kg of CaO, NaHCO 3 Add 1.0kg into the furnace respectively, turn on the electricity to raise the temperature, and the materials in the furnace are melted in about 20 minutes, and the slag is removed.

[0050] Impurities

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PUM

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Abstract

The present invention relates to pure iron smelting method and aims at providing one kind of iron smelting process with smoke and dust from converter steel smelting and waste steel as material and thus with low cost, simple process and stable quality. The material is first added into and heated in inducing furnace; slag forming agent NaHCO3, CaO and MgO are added when the material begins to smelt; the all materials are made to smelt and the slag is exhausted; and the components in the iron including impurity are analyzed. The said process is repeated for at least two times to produce pure iron reaching the relevant standard. The molten iron is poured into steel llade, added with deoxidizing agent aluminium and cast to obtain pure iron product.

Description

technical field [0001] The invention relates to a method for smelting ferrous metals, in particular to a method for smelting pure iron with an induction furnace using converter steelmaking dust and scrap steel as raw materials. Background technique [0002] At present, the production method of industrial pure iron is to use steel as raw material, generally low-carbon steel is used as raw material, and it is smelted by electric arc furnace plus AOD furnace (argon oxygen decarburization furnace) or electric arc furnace plus RH furnace (circulating vacuum furnace). The main method is to reduce the partial pressure of CO to promote the oxidation of carbon in molten steel, thereby reducing the carbon content in molten steel to meet the requirements of pure iron. According to this process, the converter steelmaking dust cannot be used as a raw material to smelt pure iron, because this process cannot remove various impurities in the converter steelmaking dust. The disadvantages of...

Claims

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Application Information

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IPC IPC(8): C21C3/00
Inventor 罗洪涛
Owner 攀枝花市永禄科技开发有限责任公司
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