Method for direct making steel using induction furnace

An induction furnace, a direct technology, applied in the field of steelmaking, can solve the problems of high power consumption, high energy consumption, large amount of coke, etc., and achieve the effect of less power consumption, low energy consumption and high thermal efficiency

Inactive Publication Date: 2006-10-25
徐建明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method uses a large amount of coke, hi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Using iron ore powder induction furnace to directly make steel, the specific process steps are as follows:

[0041] Step 1. Ironmaking

[0042] Put 100 parts of iron ore powder, 5-8 parts of graphite coal block and 7-12 parts of lime block into the induction furnace, heat to 1350-1400°C to melt into molten iron, remove slag,

[0043] Step 2. Steelmaking

[0044] Pass lime powder and oxygen into the molten iron described in step 1, heat up to 1650-1680 ° C, tap molten steel, wherein the input amount of lime powder is 3-5% of the iron ore powder input amount,

[0045] Step 3. Casting ingots, billets or castings

[0046] The molten steel produced in step two is cast into cast steel ingots, steel billets or steel castings.

Embodiment 2

[0048] Direct steelmaking with iron scale induction furnace, the specific process steps are as follows:

[0049] Step 1. Ironmaking

[0050] Put 100 parts of iron oxide scale, 5-8 parts of graphite coal block and 5-7 parts of lime block into the induction furnace, heat to 1350-1400 ° C, melt into molten iron, and remove slag.

[0051] Step 2. Steelmaking

[0052] Pass lime powder and oxygen into the molten iron described in step 1, heat up to 1650-1680 ° C, and tap the molten steel, wherein the input amount of lime powder is 2-3% of the input amount of iron oxide scale,

[0053] Step 3. Casting ingots, billets or castings

[0054] Casting the molten steel obtained in step two into steel ingots, billets or steel castings.

Embodiment 3

[0056] The iron slag processed by magnetic separation or steel slag or iron and steel slag induction furnace is used for direct steelmaking. The specific process steps are as follows:

[0057] Step 1. Ironmaking

[0058] Place 100 parts of iron slag or steel slag or iron and steel slag processed by magnetic separation, 4-6 parts of graphite coal block and 5-7 parts of lime block in an induction furnace, heat to 1350-1400 ° C to melt into molten iron, and remove slag.

[0059] Step 2. Steelmaking

[0060] Pass lime powder and oxygen into the molten iron described in step 1, heat up to 1650-1680 ° C, and tap molten steel, wherein the input amount of lime powder is 1-2% of the input amount of iron slag or steel slag or iron-steel slag,

[0061] Step 3. Casting ingots, billets or castings

[0062] The molten steel produced in step two is cast into cast steel ingots, steel billets or steel castings.

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PUM

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Abstract

The invention relates to the method of making steel directly using the inducing stove, the method of directly making steel using the iron ore, ferric oxide sheet, the steel dregs in the inducing stove is disclosed. It belongs to the metallurgy technical domain. The producing process includes the blow steps: 1. puddling: the iron ore, the ferric oxide sheet, the one or the three sorts of the scruff by the magnetism choosing or the steel dregs or the iron and the steel dregs, the black lead mine block and the limestone block are put in the inducing stove, the temperature is promoted to the 1350-1400 to melting to the molten iron and pushing aside the dregs, 2. steel-making: the limestone powder and the oxygen are added in the said molten iron to promote the temperature to 1650-1680, the molten steel is gained, thereinto, the quantity put of the limestone is the 2-5 percentage of the iron ore powder, the ferric oxide sheet, the one sort or the three sorts of the magnetism choosing scruff or the steel dregs or the iron and the steel dreg, 3. casting the steel ingot, the steel embryo or the cast steel piece. The energy consume of the invention is low.

Description

Technical field: [0001] The present invention relates to a steelmaking method. It specifically relates to a method for directly making iron and steel in an induction furnace using one or three of iron ore powder, iron oxide scale and iron steel slag. It belongs to the field of metallurgy technology. Background technique: [0002] Before the present invention was made, the traditional method of making iron was to first make iron with blast furnace, and then to make steel with converter or electric furnace. Blast furnace ironmaking is to first sinter iron ore powder, iron oxide scale and iron steel slag into agglomerates, and then put the sintered agglomerates in a blast furnace to melt into molten iron. Converter steelmaking is to put blast furnace molten iron into the converter and blow it into steel; electric furnace steelmaking is to put blast furnace molten iron or iron nuggets into the electric furnace to melt into steel. The above method uses a large amount of coke, ...

Claims

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Application Information

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IPC IPC(8): C21B13/12C22B5/10
Inventor 徐建明
Owner 徐建明
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