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Alloy deoxidizer for steelmaking and preparation method

A deoxidizer and alloy technology, applied in the field of metallurgy, can solve the problems of affecting the smelting time, increasing the cost of steelmaking, affecting the output of steel, etc., and achieve the effects of shortening the smelting time, improving the utilization rate, and increasing the specific gravity and melting point.

Inactive Publication Date: 2017-01-25
谢廷声
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the process cumbersome, and will also affect the refining time, affect the output of steel, and increase the cost of steelmaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step is to reduce and smelt the manganese-silicon alloy in the submerged arc furnace.

[0020] Furnace ratio. Mix 100kg of manganese ore, (30kg of manganese-rich slag, containing Mn30%, manganese ore containing Mn28%, 70kg), 12kg of silica, 20kg of coke, and 3.5kg of lime.

[0021] Stir the above charge evenly and put it into 1800KVA submerged arc furnace (test furnace). Smelt for about 1.5 hours, take it out of the furnace and pour it into the alloy ladle, and pick up 610kg. The manganese-silicon alloy solution contains 70% Mn, 22% Si, 1.2% C, 9% Fe, and 0.18% P. Ton consumes 4400 degrees of electricity.

[0022] In the second step, inject the manganese-silicon alloy liquid in the alloy bag into a 1.5-ton intermediate frequency electric furnace. Add 60kg of metal manganese to supplement manganese deficiency in the manganese-silicon alloy liquid. If manganese metal is not supplemented, 110kg of manganese-silicon alloy is added during steelmaking. Add 140...

Embodiment 2

[0024] The first step, with embodiment 1.

[0025] Second step, technique is with embodiment 1. Add 110kg of aluminum, Al-Mn-Si alloy composition: manganese 58%, silicon 18%, aluminum 15%, and the balance is iron and impurities.

Embodiment 3

[0027] The first step, with embodiment 1.

[0028] In the second step, the process is the same as in Example 1, adding 40kg of aluminum, the composition of the aluminum-manganese-silicon alloy: manganese 65%, silicon 20%, aluminum 6%, and the balance is Fe and impurities.

[0029] When used in high-aluminum steel, aluminum can reach about 30% in the aluminum-manganese-silicon alloy, and manganese-silicon alloy is added.

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PUM

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Abstract

The invention discloses an alloy deoxidizer for steelmaking. The alloy deoxidizer is used for steelmaking an aluminum-manganese-silicon alloy capable of completing manganese-silicon alloying and deoxidation synchronously. The aluminum-manganese-silicon alloy contains 5-30% of aluminum, 50-70% of manganese, 8-30% of silicon, and the balance of iron and unavoidable impurities. The preparation method is a combination of a reduction smelting method and a remelting method, and carried out in the following two steps: step one, smelting manganese-silicon alloy liquid in a mine heating furnace according to a furnace charge proportion based on requirements on components manganese and silicon in the aluminum-manganese-silicon alloy; step two, injecting the aluminum-manganese-silicon alloy liquid into a smelting furnace, adding the proportion of aluminum for remelting to prepare the aluminum-manganese-silicon alloy. The alloy deoxidizer can replace all the high-carbon ferromanganese, part of ferrosilicon and aluminum or aluminum composite deoxidizer used in steelmaking.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to an alloy deoxidizer for steelmaking and a preparation method thereof. Background technique [0002] Manganese-silicon alloy is a ferroalloy composed of manganese, silicon, iron, etc., and is the main alloying agent for steelmaking. Manganese exists in solid solution in steel and plays a strengthening role, which can increase the strength of ferrite, improve the mechanical properties of steel, and enhance the strength, ductility, toughness and wear resistance of steel. Silicon exists in steel in solid form, which can improve the strength, fatigue limit, corrosion resistance and wear resistance of steel. Therefore, manganese-silicon alloy is an indispensable alloying agent in steelmaking. Manganese and silicon in manganese-silicon alloy have a strong affinity with oxygen, and it is also a deoxidizer for steelmaking, and the deoxidized product MnSiO 3 and Mn 2 SiO 4 , with low melting p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C22C35/00
Inventor 谢廷声
Owner 谢廷声