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Carburetant for steelmaking and preparation method thereof

The technology of recarburizer and adhesive is applied in the field of recarburizer for steelmaking and its preparation, which can solve the problems of poor compatibility of recarburizer, burning loss, and poor carburization effect, and achieves improved stability of recarburization. performance, reduce production costs, and improve performance

Inactive Publication Date: 2020-06-23
JIANGSU SURUN HIGH CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] These existing recarburizers all have defects in varying degrees during use, mainly because the interface compatibility between the recarburizer and molten steel is poor. It is easy to enter the slag and burn out, resulting in poor carburization effect

Method used

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  • Carburetant for steelmaking and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A recarburizer for steelmaking, comprising the following components in parts by weight: 300 parts of a carbon-containing mixture, 5 parts of silicon nitride, 3 parts of a dispersant, and 2 parts of a binder; the carbon-containing mixture is made of petroleum Coke powder, waste straw powder, and nano-carbon are mixed according to the molar ratio of 50:23:5. Under nitrogen environment, the temperature is raised to 1500°C at a rate of 3°C / min. Ball mill to 200 mesh sieve to obtain carbon-containing mixture.

[0020] The adhesive is formed by mixing an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 2:1. When the organic binder is modified starch, the modified starch is formed by mixing starch, chitosan and iron powder according to a molar ratio of 5:1:3, and the preparation method of the modified starch is as follows: After dissolving in water, add chitosan and stir evenly, then add iron powder, continue ...

Embodiment 2

[0024] A recarburizer for steelmaking, comprising the following components in parts by weight: 4500 parts of carbon-containing mixture, 10 parts of silicon nitride, 6 parts of dispersant, and 6 parts of binder; the carbon-containing mixture is made of petroleum Coke powder, waste straw powder, and nano-carbon are mixed according to the molar ratio of 75:30:8. Under nitrogen environment, the temperature is raised to 1685°C at a rate of 8°C / min. , ball milled to a 260 mesh sieve to obtain a carbon-containing mixture.

[0025] In the above raw materials, the adhesive is mixed with an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 2:1; the organic adhesive is modified Mix one or more of starch, nitrile rubber or sodium hydroxymethyl cellulose.

[0026] It is further improved that the modified starch is formed by mixing starch, chitosan and iron powder according to a molar ratio of 5:1:3, and the preparation meth...

Embodiment 3

[0029] A recarburizer for steelmaking, comprising the following components in parts by weight: 500 parts of a carbon-containing mixture, 12 parts of silicon nitride, 10 parts of a dispersant, and 8 parts of a binder; the carbon-containing mixture is made of petroleum Coke powder, waste straw powder, and nano-carbon were mixed according to the molar ratio of 80:32:10. Under nitrogen environment, the temperature was raised to 1785°C at 7°C / min, kept for 1h, and then refrigerated at 4°C for 2h. Mesh sieve to obtain carbon-containing mixture.

[0030] The adhesive is formed by mixing an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 2:1. The modified starch is formed by mixing starch, chitosan and iron powder according to the molar ratio of 5-6:1:3. The preparation method of the modified starch is: after dissolving the starch in water, add chitosan and stir Evenly, add iron powder, continue to stir, and heat unt...

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Abstract

The invention discloses a carburetant for steelmaking and a preparation method thereof. The carburetant comprises the following components in parts by weight of 300-500 parts of carbon-containing mixture, 5-12 parts of silicon nitride, 3-10 parts of dispersant, and 2-8 parts of adhesive; the carbon-containing mixture is prepared by mixing petroleum coke powder, waste straw powder and nano-carbon according to a molar ratio of (50-80) to (23-32) to (5-10), heating to 1500-1785 DEG C in a nitrogen environment, performing heat preservation for 0.5-1h and then carrying out low-temperature refrigeration at 2-4 DEG C for 1-2h and carrying out grinding to 200-300 meshes. Compared with the prior art, the carburetant is simple in component, rich in sources, high in compatibility with the molten steel, in preparation of the steel, the adding amount is less, the obtained steel has excellent quality and low in defective rate.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a recarburizer for steelmaking and a preparation method thereof. Background technique [0002] With the development and maturity of new smelting technology, in the smelting process, due to improper ingredients or charging and excessive decarburization, sometimes the carbon content in the steel does not meet the requirements of the peak period, prompting producers to add carbon to the molten steel . The market's requirements for carburizers are also getting higher and higher to meet the needs of high-quality smelting. Commonly used recarburizers are recarburized pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder. [0003] These existing recarburizers all have defects in varying degrees during use, mainly because the interface compatibility between the recarburizer and molten steel is poor. It is easy to enter the slag and burn o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00
CPCC21C7/0025
Inventor 陈怡倪瑾胡杰
Owner JIANGSU SURUN HIGH CARBON
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