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Deoxidizing agent for steelmaking and preparation method thereof

A technology of deoxidizer and calcium oxide, which is applied in the field of steelmaking additive preparation, can solve the problem of low deoxidation efficiency and achieve the effect of reducing oxygen content

Inactive Publication Date: 2017-12-01
常州莱尚纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a deoxidizer for steelmaking and its preparation method in view of the disadvantages of using aluminum as a deoxidizer for steelmaking with low deoxidation efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Put the straw into the pulverizer for 30 minutes to obtain rice straw powder, take 1kg of rice straw powder and add it to the retort, raise the temperature to 260°C at a heating rate of 10°C / min, keep the heat for 60min, and wait for the material in the retort to cool down to At room temperature, the dry distillation product was obtained, and the dry distillation product, 10g polyvinyl alcohol and 400mL water were added to the beaker, stirred and mixed for 3 minutes to obtain a mixed solution, the mixed solution was placed in a mold, and pressed for 5 minutes under a pressure of 30MPa to obtain a masterbatch. The masterbatch is placed in a carbonization furnace, and hydrogen gas is introduced into the carbonization furnace, and the rate of hydrogen gas introduction is controlled at 5mL / min. Under the hydrogen protection state, the carbonization is carried out at 400°C for 1 hour, and then naturally cooled to room temperature, and the introduction of hydrogen gas is stoppe...

example 2

[0027]Put the straw into the pulverizer and pulverize it for 35 minutes to get straw powder. Take 2kg of straw powder and add it to the retort, raise the temperature to 270°C at a heating rate of 13°C / min, keep it warm for 75min, and wait for the material in the retort to cool down with the furnace. to room temperature to obtain a dry distillation product, put the dry distillation product, 13g sodium dodecylsulfonate and 450mL water into a beaker, stir and mix for 4min to obtain a mixed solution, put the mixed solution in a mold, and press it under a pressure of 35MPa for 8min , to obtain the masterbatch, put the masterbatch in a carbonization furnace, and pass ammonia gas into the carbonization furnace, control the rate of ammonia gas introduction to 8mL / min, and keep carbonization at 430°C for 2h under the protection of ammonia gas, and then Naturally cool to room temperature, stop feeding ammonia gas to obtain carbonized material, put the carbonized material in a pulverizer ...

example 3

[0029] Put the straw into the pulverizer and pulverize it for 40 minutes to get straw powder. Take 2kg of straw powder and add it to the retort, raise the temperature to 280°C at a heating rate of 15°C / min, keep it warm for 90 minutes, and wait for the material in the retort to cool with the furnace. to room temperature to obtain a dry distillation product, put the dry distillation product, 7g polyvinyl alcohol, 8g sodium dodecylsulfonate and 500mL water into a beaker, stir and mix for 5min to obtain a mixed solution, put the mixed solution in a mold, The masterbatch was pressed under the pressure of 10min to obtain the masterbatch, and the masterbatch was placed in the carbonization furnace, and ammonia gas was introduced into the carbonization furnace, and the rate of ammonia gas introduction was controlled at 10mL / min. Insulate and carbonize for 2 hours, then cool naturally to room temperature, stop feeding ammonia gas to obtain carbonized material, put the carbonized materi...

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PUM

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Abstract

The invention discloses a deoxidizing agent for steelmaking and a preparation method thereof and belongs to the technical field of steelmaking additive preparation. The deoxidizing agent for steelmaking is prepared from, by weight, 30-40 parts of calcium oxide, 20-30 parts of calcium carbide, 20-30 parts of magnesium oxide, 10-20 parts of barium carbonate, 20-30 parts of a carbonized material and 40-50 parts of products. According to the deoxidizing agent for steelmaking and the preparation method thereof, after being pulverized and molten, the calcium oxide, the calcium carbide, the magnesium oxide and barium sulfate are put into a mold, and compression molding is conducted, so that a cast ingot is obtained; and after pulverized, cast ingot powder is mixed with the carbonization material and the products and stirred, so that the deoxidizing agent for steelmaking is obtained. The deoxidizing agent for steelmaking has the beneficial effects of being high in deoxidizing efficiency and good in deoxidizing effect.

Description

technical field [0001] The invention relates to a deoxidizer for steelmaking and a preparation method thereof, belonging to the technical field of steelmaking additive preparation. Background technique [0002] With the development of the national economy, the requirements for steel types and their quality are increasing day by day, and the steel smelting technology has developed from the original one-step steelmaking to the two-step steelmaking, which is divided into two steps: primary smelting and refining. The temperature of molten steel and the content of main elements are controlled by primary refining, and deoxidation, impurity removal and alloying are carried out by refining to obtain steel grades of expected variety and quality. In steelmaking, before entering the refining furnace, the surface of the molten steel should be covered with an insulating agent to prevent the molten steel from cooling down and surface oxidation. After entering the refining furnace, it need...

Claims

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Application Information

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IPC IPC(8): C21C7/06
CPCC21C7/06
Inventor 姜建国方晓俊宋玲
Owner 常州莱尚纺织品有限公司
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