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White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof

A refining agent and refining furnace technology, applied in the field of white slag refining agent, can solve the problem of low ability to absorb inclusions, and achieve the effects of low cost, wide application range and reduction of thermal radiation

Active Publication Date: 2012-09-05
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art uses fluorite, limestone, bauxite, dolomite or their combination as the refining agent, but the inventors of the present invention, after a large number of tests, found that the ability to adsorb inclusions in practical applications is not high, especially for class A Inclusions

Method used

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  • White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof
  • White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof
  • White slag refining agent for LF (Ladle Furnace) refining furnace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1 Preparation and application of white slag refining agent of the present invention

[0061] After weighing 40% by weight of calcium carbide, 14% by weight of fluorite, 30% by weight of limestone, 5% by weight of bauxite, and 11% by weight of dolomite, the weighed fluorite Stone, limestone, dolomite, and bauxite are respectively fed into the mixing mixer for mixing and stirring. After mixing and stirring for 2 minutes, calcium carbide is added to continue mixing and stirring for 4 minutes. After observing that the product has been stirred and mixed evenly to form a product, it is loaded into a woven bag lined with a plastic film from the outlet of the mixer. Sampling carried out the detection of chemical composition simultaneously (chemical composition detection sees Table 2), this white slag refining agent is applied to steelmaking LF operation, adds LF, and addition is 300kg / furnace (2.307kg / ton molten steel), observes that LF emerges The ladle slag compo...

Embodiment 2

[0062] Embodiment 2 Preparation and application of white slag refining agent of the present invention

[0063] After weighing 50% by weight of calcium carbide, 8% by weight of fluorite, 24% by weight of limestone, 6% by weight of bauxite, and 12% by weight of dolomite, the weighed fluorite Stone, limestone, dolomite, and bauxite are respectively fed into the mixing mixer for mixing and stirring. After mixing and stirring for 2 minutes, calcium carbide is added to continue mixing and stirring for 4 minutes. After observing that the product has been stirred and mixed evenly to form a product, it is loaded into a woven bag lined with a plastic film from the outlet of the mixer. At the same time, samples were taken to detect the chemical composition (see Table 2 for the chemical composition detection). This white slag refining agent was applied to the steelmaking LF process, and 300kg / furnace (2.307kg / ton molten steel) was added to the LF furnace, and the LF outbound ladle was obs...

Embodiment 3

[0064] Embodiment 3 Preparation and application of white slag refining agent of the present invention

[0065] After weighing 45% by weight of calcium carbide, 12% by weight of fluorite, 28% by weight of limestone, 5% by weight of bauxite, and 10% by weight of dolomite, the weighed fluorite Stone, limestone, dolomite, and bauxite are respectively fed into the mixing mixer for mixing and stirring. After mixing and stirring for 2 minutes, calcium carbide is added to continue mixing and stirring for 4 minutes. After observing that the product has been stirred and mixed evenly to form a product, it is loaded into a woven bag lined with a plastic film from the outlet of the mixer. At the same time, samples were taken to detect physical and chemical indicators (see Table 2 for detection). Apply this white slag refining agent to the steelmaking LF process, add 300kg / furnace to the LF furnace, (2.307kg / ton molten steel) to observe the composition of LF outbound ladle slag, See Table ...

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Abstract

The invention relates to a white slag refining agent for an LF (Ladle Furnace) refining furnace, belonging to the technical field of steel making, in particular to the technical field of ladle slag modification treatment of the LF refining furnace. The invention aims to provide the white slag refining agent which has the advantages of low cost and strong inclusion adsorption capacity. The white slag refining agent for the LF refining furnace is characterized by comprising the following components in percentage by weight: 40-50 percent of calcium carbide, 8-14 percent of fluorite, 24-30 percent of limestone, 4-6 percent of bauxite and 4-12 percent of dolomite. The white slag refining agent has the advantages of low cost and wider application range and is suitable for a non Al deoxidized steel (a kind of steel, strictly controlling the aluminum content), for example. After being added into the LF refining furnace, the white slag refining agent can fulfill the functions of rapid deoxidation and white slag production and can enable the content of FeO and MnO in ladle slag to be no more than 1.5 percent to satisfy the smelting needs of high-grade steels.

Description

technical field [0001] The invention relates to a white slag refining agent used in the modification treatment of LF refining furnace ladle slag. The invention belongs to the technical field of steelmaking, in particular to the technical field of LF refining furnaces. Background technique [0002] With the continuous development of science and technology, the iron and steel industry has put forward higher and higher requirements for steelmaking productivity, steel cost, steel purity and performance. The traditional steelmaking equipment and steelmaking process are difficult to meet the demand. In the 1960s, the traditional steelmaking method has undergone fundamental changes, from the original one-step steelmaking that completed the primary and refined steelmaking with a single equipment to the molten steel. Primary smelting, followed by special equipment (steel ladle or other containers) for two-step steelmaking, in order to achieve the purpose of improving the output, qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/04
Inventor 陈涛李坚吴胜利黄国炳郑德明
Owner PANZHIHUA GANGCHENG GROUP
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