Silicon-aluminum-calcium-magnesium alloy as well as preparation method and application thereof

A calcium-magnesium alloy and alloy technology, applied in the field of metallurgy, can solve problems such as product quality decline, low alloy recovery rate, and inability to desulfurize molten steel, so as to improve the mechanical properties of steel, improve the fluidity of molten steel, and increase the alloy recovery rate. Effect

Inactive Publication Date: 2011-07-20
刘治国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although these existing alloys have achieved good results in the pre-deoxidation of oxidative molten steel, such as improving the removal conditions of oxide inclusions, they cannot achieve desulfurization of molten steel while deoxidizing, and the deoxidation speed is slow. , so that the energy consumption is high, and some of them will cause problems such as plugging and nodulation, which will reduce the quality of the product, and the recovery rate of the alloy is not high, resulting in a large consumption of alloy and high cost
And the existing alloy will produce larger smog and pollute the environment when blanking

Method used

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  • Silicon-aluminum-calcium-magnesium alloy as well as preparation method and application thereof
  • Silicon-aluminum-calcium-magnesium alloy as well as preparation method and application thereof
  • Silicon-aluminum-calcium-magnesium alloy as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take silica (SiO 2 >98%) 300kg, silicon carbide (SiC>88%) 300kg, high-purity magnesia (MgO>95%) 120kg, bauxite (Al 2 o 3 >85%) 300kg, limestone (CaCO 3 >85%) 220kg, 20kg of steel shavings, mixed evenly, put into an intermediate frequency electric furnace to smelt the chemical material for 40-70 minutes, smelt at 1700°C for 110 minutes, remove the slag and get out of the furnace.

[0025] The obtained products were tested by the Rock and Mineral Testing Center of the First Institute of Geological Exploration of Henan Provincial Bureau of Geology and Mineral Resources, as shown in Table 1

[0026] Table 1

[0027] Test items and parameters

[0028] The percentage content of each component is: silicon (Si) 24%, aluminum (Al) 8%, calcium (Ca) 14%, magnesium (Mg) 5%, silicon carbide (SiC) 7%, sulfur (S) 0.06%, phosphorus (P) 0.025%, and the balance is iron. Melting point≤1320°C, melting rate (1600°C)≤50S, viscosity (1500°C)≤1pa.s.

Embodiment 2

[0030] Take silica (SiO 2 >98%) 280kg, silicon carbide (SiC>88%) 280kg, high-purity magnesia (MgO>95%) 100kg, bauxite (Al 2 o 3 >85%) 350kg, limestone (CaCO 3 >85%) 250kg, 20kg of steel shavings, mixed evenly, put into an intermediate frequency electric furnace to smelt the chemical material for 40-70 minutes, smelt at 1700°C for 110 minutes, and remove the slag to get it out of the furnace.

[0031] The resulting product is detected by the Rock and Mineral Testing Center of the First Academy of Geological Exploration of the Bureau of Geology and Mineral Resources of Henan Province, the same as in Example 1. The percentage content of each component is: silicon (Si) 22%, aluminum (Al) 12%, calcium (Ca) 18%, magnesium (Mg) 4%, silicon carbide (SiC) 6%, sulfur (S) 0.07%, phosphorus (P) 0.025%, and the balance is iron. Melting point≤1320°C, melting rate (1600°C)≤50S, viscosity (1500°C)≤1pa.s.

Embodiment 3

[0033] Take silica (SiO 2 >98%) 330kg, silicon carbide (SiC>88%) 330kg, high-purity magnesia (MgO>95%) 150kg, bauxite (Al 2 o 3 >85%) 250kg, limestone (CaCO 3 >85%) 200kg, 20kg of steel shavings, mixed evenly, put into an intermediate frequency electric furnace to smelt the chemical material for 40-70 minutes, smelt at 1700°C for 110 minutes, remove the slag and get out of the furnace.

[0034] Gained product is detected by the Rock and Mineral Testing Center of the First Institute of Geological Exploration of Henan Bureau of Geology and Mineral Resources, and the percentage composition of its components is as in Example 1: silicon (Si) 28%, aluminum (Al) 7%, calcium (Ca ) 12%, magnesium (Mg) 8%, silicon carbide (SiC) 10%, sulfur (S) 0.07%, phosphorus (P) 0.025%, and the balance is iron. Melting point≤1320°C, melting rate (1600°C)≤50S, viscosity (1500°C)≤1pa.s.

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Abstract

The invention provides a silicon-aluminum-calcium-magnesium alloy for steelmaking deoxidization. The alloy consists of the following components in percentage by weight: 10-30 percent of silicon (Si), 5-25 percent of aluminum (Al), 5-25 percent of calcium (Ca), 3-15 percent of magnesium (Mg), 5-20 percent of silicon carbide (SiC) and the balance of iron and inevitable impurities. When the alloy is applied to steelmaking deoxidization, smog is not produced, plugging and dross are avoided, the deoxidization speed is remarkably increased and the alloy recovery rate is high, so that energy consumption is lowered, environmental pollution is avoided, the quality of a steel product is enhanced and steelmaking cost is lowered. The invention also provides a preparation method and application of the silicon-aluminum-calcium-magnesium alloy.

Description

technical field [0001] The invention relates to a composite deoxidizer, in particular to a silicon-aluminum-calcium-magnesium alloy used for steelmaking deoxidation and a preparation method thereof, belonging to the field of metallurgy. Background technique [0002] "Tapping and refining" is an important link in modern steelmaking production. In 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; at the same time, it is also conducive to improving the yield of alloys. 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. [0003] The research on tapping additives has received extensive attention. Traditional tapping additives are mostly simple synthetic slag desulfurizers based on lime and fluorite. Since the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064C22C30/00C22C28/00C22C38/06
Inventor 刘治国秦菲魏巍
Owner 刘治国
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