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Slag melting agent of refining furnace of molten steel and production method thereof

A technology of refining furnace and slag agent, which is applied in the field of steel slag slag agent that is convenient for inserting temperature measuring rods into molten steel. It can solve problems such as the inability to float the ladle without sticking slag, the temperature drop of molten steel, and the inability to solve the problem of slag being too sticky and impurities, so as to achieve improvement. Fluidity of slag, reduction of slag melting point and viscosity, and good spreadability

Active Publication Date: 2014-02-12
HUZHOU MINGDE REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too much slag removal will cause secondary oxidation on the surface of molten steel, and at the same time, the temperature of molten steel will drop faster, and it will not be able to solve the problems such as the slag is too sticky and impurities cannot float up and the ladle does not stick to slag. It only reduces the speed of sticking slag on the steel wall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a molten steel refining furnace slag agent, its specific composition and composition ratio by weight percentage are: quartz sand 53%, expanded perlite 15%, metal silicon powder 10%, passivated lime 10%, ore Cotton 1%, cardboard 8%, modified starch 3%.

[0021] Preparation method: ①. According to the proportion of the components, first add quartz sand, mineral wool, cardboard and modified starch into the mixer, and at the same time add 20% water for high-speed stirring to fully break up the mineral wool and cardboard, then add the rest of the formula raw materials and stir well into a uniform slurry;

[0022] ②. Add the above-mentioned slurry into the mold, form it into a small cube of 2×2cm by vacuum suction filtration, and return the waste water produced by the suction filtration to the mixer for recycling of slurry water;

[0023] ③. Send the formed small cubes into the drying kiln and dry at a temperature of about 100°C for 12 hours to obtain t...

Embodiment 2

[0026] Embodiment 2, a molten steel refining furnace slag agent, its specific components and composition ratio by weight percentage are: 65% of quartz sand, 7% of vermiculite, 10% of 1-0mm aluminum particles, 10% of calcium aluminate, Mineral wool 2%, cardboard 4%, phenolic resin 2%.

[0027] Preparation method: ①. According to the proportion of the components, first add quartz sand, mineral wool, cardboard and phenolic resin into the mixer, and at the same time add 20% water for high-speed stirring to fully break up the mineral wool and cardboard, then add the rest of the formula raw materials and fully stir to form uniform slurry;

[0028] ②. Add the above-mentioned slurry into the mold, form it into a small cube of 2×2cm by vacuum suction filtration, and return the waste water produced by the suction filtration to the mixer for recycling of slurry water;

[0029] ③. Send the formed small cubes into the dryer, and dry them at a temperature of about 100°C for 12 hour...

Embodiment 3

[0032] Embodiment 3, a molten steel refining furnace slag agent, its specific components and composition ratio by weight percentage are: 58% of quartz sand, 6% of expanded perlite, 8% of vermiculite, 5% of 1-0mm aluminum particles, Metal silicon powder 3%, calcium aluminate 5%, passivated lime 5%, mineral wool 2%, cardboard 6%, plant adhesive 2%.

[0033] Preparation method: ①. According to the proportion of the components, first add quartz sand, mineral wool, cardboard and plant adhesive into the mixer, and at the same time add 20% water for high-speed stirring to fully break up the mineral wool and cardboard, and then add the rest of the formula raw materials to fully Stir into a homogeneous slurry;

[0034] ②. Add the above-mentioned slurry into the mold, form it into a small cube of 2×2cm by vacuum suction filtration, and return the waste water produced by the suction filtration to the mixer for recycling of slurry water;

[0035] ③. Send the formed small cubes in...

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Abstract

The invention relates to a slag melting agent of a refining furnace of molten steel and a production method thereof. The slag melting agent of the refining furnace of the molten steel comprises the following constituent components and the following constituent proportion according to weight percentage: 50 to 65 percent of quartz sand, 0 to 15 percent of expanded perlite, 0 to 15 percent of vermiculite, 0 to 10 percent of aluminum particle of 1 to 0mm, 0 to 10 percent of metal silicon powder, 0 to 10 percent of calcium aluminate, 0 to 10 percent of passivated lime, 1 to 3 percent of mineral wool, 4 to 8 percent of cardboard and 1 to 3 percent of adhesive; and the raw material of each component is mixed into slurry for pressing formation and is also dried at 100 DEG C so as to form the slag melting agent of the refining furnace of the molten steel. The product disclosed by the invention has good spreadability. When the slag melting agent of the refining furnace of the molten steel is thrown to the surface of steel slag in a steel ladle, the slag melting agent of the refining furnace of the molten steel can directly react with residues, the melting point and the viscosity of the residues are lowered, the fluidity of the slag is improved, and a temperature measuring gun is convenient to penetrate through a slag layer for quickly measuring the temperature of the molten steel; meanwhile, the slag hung at a coating wall is removed, so that the phenomenon of slag bonding does not occur at an opening of the ladle; and the slag melting agent also has the functions of heat insulation and heat preservation of a covering agent, the impurities of sulfur, oxygen and the like in the molten steel can also be adsorbed, the molten steel is purified, and a new product of the slag melting agent with comprehensive and excellent quality is provided to the refining furnace of the molten steel.

Description

technical field [0001] The invention relates to a steel slag melting slag agent for a steelmaking furnace, in particular to a steel slag melting slag agent which is convenient for inserting a temperature measuring rod into molten steel. Background technique [0002] After a long time of vacuum degassing and refining in the molten steel refining furnace, the steel slag becomes sticky and hard, and the cladding wall, especially the cladding edge, is easy to hang slag. When cleaning the slag, it will damage the cladding refractory material and greatly reduce its service life; At the same time, the too sticky and hard steel slag makes the inner diameter of the temperature measuring gun insertion tube smaller, and the outer wall of the insertion tube forms a slag shell, making it difficult to pass through the slag layer. The traditional method is to take slag removal measures to reduce the thickness of the slag layer. However, too much slag removal will cause secondary oxidation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 虞畅严培忠陈欢吴开道
Owner HUZHOU MINGDE REFRACTORY MATERIAL