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Preparation method of lignosulfonic acid composite ceramic fiber molten steel heat preservation agent

The technology of lignosulfonic acid and composite ceramics is applied in the field of preparation of lignosulfonic acid composite ceramic fiber molten steel heat insulating agent, which can solve the problems of low content of heat insulating agent, influence heat preservation effect, pollute the environment, etc., and achieve the effect of no pollution

Inactive Publication Date: 2016-07-20
常州可赛成功塑胶材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the low content of heat preservation agent prepared by carbonized rice husk, which affects its heat preservation effect, and at the same time, it will seriously pollute the environment when dosing, it provides a condensate combined with lignin sulfonic acid. The thermal insulation effect of the thermal insulation agent prepared by the invention is good, and the average temperature drop of molten steel is 1.0-1.2°C. At the same time, lignin sulfonic acid is used as the gel to avoid occurrence of Pulverization phenomenon, resulting in dust, polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First weigh 8g of lignosulfonic acid, place it in 25mL of deionized water, stir it and dissolve it completely, then filter it with suction, collect the filtrate and mix it with 5mL of sulfuric acid solution with a mass concentration of 20%. After completion, move it to a 50mL three-necked flask, and add 15mL deionized water to the three-necked flask, stir and mix, and place it in an oil bath at 90°C for 2 hours for hydrolysis to prepare a hydrolyzate; then measure 25mL of the hydrolyzate to place In a 500mL three-necked flask, preheat it at 50°C for 15min, then add 2.2mL of dibutyltin dilaurate dropwise to it, and control the dropping for 15min to complete. , continue to add 0.8mL1,4-butanediol to the three-necked flask, stir and mix for 15min; , stirred and mixed and suction filtered, collected the filtrate and rotary evaporated it to 1 / 5 of its original volume to prepare a lignosulfonic acid-modified hydrogel; then measure 300mL of absolute ethanol and place it in a 5...

example 2

[0021] First weigh 5g of lignosulfonic acid, place it in 20mL of deionized water, stir to mix and dissolve it completely, then filter it with suction, collect the filtrate and stir and mix with 3mL of sulfuric acid solution with a mass concentration of 20%, and wait to mix After completion, move it to a 50mL three-necked flask, and add 10mL deionized water to the three-necked flask, stir and mix and place it in an oil bath at 88°C for 1 hour to prepare a hydrolyzate; then measure 20mL of the hydrolyzate to place In a 500mL three-neck flask, preheat it at 45°C for 10min, then add 2.0mL of dibutyltin dilaurate dropwise to it, and control the dropwise addition for 15min. , continue to add 0.5mL 1,4-butanediol to the three-necked flask, stir and mix for 10min; , stirred and mixed and suction filtered, collected the filtrate and rotary evaporated it to 1 / 5 of its original volume to prepare a lignosulfonic acid-modified hydrogel; then measure 200mL of absolute ethanol and place it i...

example 3

[0023]First weigh 7g of lignosulfonic acid, place it in 22mL of deionized water, stir to mix and dissolve it completely, then filter it with suction, collect the filtrate and stir and mix with 4mL of sulfuric acid solution with a mass concentration of 20%, and wait to mix After completion, move it to a 50mL three-necked flask, and add 12mL deionized water to the three-necked flask, stir and mix and place it in an oil bath at 89°C for 1 hour to prepare a hydrolyzate; then measure 22mL of the hydrolyzate to place In a 500mL three-neck flask, preheat at 47°C for 12min, then add 2.1mL of dibutyltin dilaurate dropwise to it, and control the addition for 15min to complete. , continue to add 0.6mL 1,4-butanediol to the three-necked flask, stir and mix for 12min; , stirred and mixed and suction filtered, collected the filtrate and rotary evaporated it to 1 / 5 of its original volume to prepare a lignosulfonic acid-modified hydrogel; then measure 250mL of absolute ethanol and place it in...

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Abstract

The invention relates to a preparation method of a lignosulfonic acid composite ceramic fiber molten steel heat preservation agent and belongs to the technical field of preparation of heat preservation agents. The preparation method includes the steps that firstly, lignosulfonic acid is dissolved in deionized water, the deionized water is subjected to suction filtration, filtrate and sulfuric acid are stirred and added with water, and hydrolysate is obtained through heating hydrolyzation; after the hydrolysate and substances like dibutyltin dilaurate are subjected to hybrid heating and cooling and are added with aminomethane dropwise, the mixture is subjected to suction filtration, filtrate is collected, and lignosulfonic acid modified hydrogel is obtained; and the lignosulfonic acid modified hydrogel is mixed with a mixed solution of absolute ethyl alcohol, glacial acetic acid and the like, then ceramic fibers and other substances are added to the mixture for mixing, the final mixture is subjected to suction filtration, and a filter cake is washed and calcinated. The heat preservation effect of the heat preservation agent prepared by the preparation method is good; the average temperature drop of molten steel is 1.0-1.2 DEG C; no molten steel splashes when the heat preservation agent is added into the molten steel; the operating environment is excellent and has no harm to operators; and no dust is generated when the heat preservation agent is added, and pollution to the environment is avoided.

Description

technical field [0001] The invention relates to a preparation method of a lignin sulfonic acid composite ceramic fiber molten steel heat preservation agent, belonging to the technical field of heat preservation agent preparation. Background technique [0002] With the continuous improvement of steel production technology and the development of high-purity ultra-low carbon steel, the requirements for auxiliary materials for steelmaking are also getting higher and higher. This can be clearly seen from the development process of molten steel thermal insulation agent. Initially, the function was only heat preservation to prevent excessive temperature drop of molten steel during transportation or pouring. However, with the improvement of steel quality requirements, the functions of molten steel heat preservation agents tend to be extensive. The specific functions include heat preservation and prevention of secondary oxidation of molten steel by the atmosphere. , Adsorb the floati...

Claims

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Application Information

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IPC IPC(8): C21C7/00B22D11/111
CPCC21C7/00B22D11/111
Inventor 高玉梅薛红娟高力群
Owner 常州可赛成功塑胶材料有限公司