Composite metallurgical refining agent

A compound refining agent and metal technology, which is applied in the field of metallurgical refining agents, can solve the problems of unsatisfactory effect, small control range, and slow speed of synthetic slag formation, so as to achieve good effect of inclusion denaturation, improve internal quality, and low steelmaking cost Effect

Inactive Publication Date: 2002-10-23
张炼
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the mechanical mixing of pure substances with high melting point, the slag formation speed of synthetic slag is slow, the utilization rate is low, the temperature drop of molten steel is large, and the effect is not ideal
Recently, some manufacturers use multi-component composite deoxidizers (Si-Al-Ba, Si-Ca-Ba, etc.) or synthetic slag containing a certain amount of calcium carbide. high
Most of the existing refining agents are made of metallurgical waste slag combined with metallurgical flux and catalyst, but the control range of trace elements, especially the amount of carbon increase is still relatively small. In terms of production, a relatively ideal effect cannot be obtained, so it is still a difficult problem to be solved in industry.

Method used

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  • Composite metallurgical refining agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0022] Each component is a solid particle of 10-40mm in size, and its powder is less than 10%. Embodiment 2: metallurgical composite refining agent (II) component: silicon-barium alloy+silicon-barium slag 45%

[0023] Calcium carbide 15%

[0024] Limestone 10%

[0025] Aluminum 5%

[0026] Rare earth alloys and oxides 10%

[0027] Silicon-calcium alloy and silicon-calcium slag 10%

Embodiment 3

[0028] Fluorite 50% Example 3: Metallurgical composite refining agent III component: silicon-barium alloy + silicon-barium slag 20%

[0029] Calcium silicon alloy + calcium calcium slag 40%

[0030] Calcium carbide 15%

[0031] Limestone 10%

[0032] Aluminum 5%

[0033] Rare earth alloys and oxides 10% Example 4: Metallurgical composite refining agent (IV) Component: silicon-calcium alloy+silicon-calcium slag 30%

[0034] Silicon-aluminum-barium-calcium alloy + silicon-aluminum-barium-calcium slag 30%

[0035] Calcium carbide 15%

[0036] Limestone 10%

[0037] Aluminum 5%

[0038] Rare earth alloys and oxides 10% Example 5: Metallurgical composite refining agent (V) Component: silicon-calcium alloy+silicon-calcium slag 40%

[0039] Silicon-aluminum-barium-calcium alloy + silicon-aluminum-barium-calcium slag 20%

[0040] Calcium carbide 15%

[0041] Limestone 10%

[0042] Fluorite 5%

Embodiment 6

[0043] Rare earth alloys and oxides 10% Example 6: (metallurgical composite refining) (VI) component: silicon-calcium alloy+silicon-calcium slag 50%

[0044] Calcium carbide 15%

[0045] Limestone 5%

[0046] Magnesium + magnesium slag 20%

[0047] Silicon-barium alloy and silicon-barium slag 10% Embodiment 7: metallurgical composite refining agent (VII) component: silicon-barium alloy+silicon-barium slag

[0048] Calcium silicon alloy + calcium calcium slag 30%

[0049] Calcium carbide 15%

[0050] Aluminum 5%

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Abstract

The present invention relates to a compound refining agent for metallurgy, which it is characterized by that it comprises 10-60% of deoxygenation and desulfurization metal, 10-60% of alkaline earth metal oxide and 0.5-50% of slagging constituent, and can effectively raise internal quality of steel.

Description

technical field [0001] The invention relates to a metallurgical refining agent, in particular to a metallurgical composite refining agent. Background technique [0002] "Tapping and refining" is an important part of modern steelmaking production. During the tapping process of oxidizing molten steel, specific substances can be added to achieve functions such as deoxidation, desulfurization, and removal of inclusions in steel, and it is also conducive to improving alloy yield. Yield. Doing a good job in tapping and refining links is of great significance for reducing the load of refining outside the furnace, improving the internal quality of steel and reducing production costs. Traditional tapping additives are mostly simple synthetic slag desulfurizers based on lime and fluorite. Because it is mechanically mixed with high melting point pure substances, the slag forming speed of synthetic slag is slow, the utilization rate is low, the temperature drop of molten steel is large,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04
Inventor 张炼
Owner 张炼
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