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Nano composite molten steel purifying agent and preparation method thereof

A nano-composite and purifying agent technology, applied in the field of metallurgy, can solve problems such as pollution and high energy consumption, and achieve the effects of avoiding agglomeration, reducing energy consumption, and reducing production processes

Inactive Publication Date: 2012-09-19
成天有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional molten steel purifiers usually use rare earth alloys, silicon-calcium alloys, silicon-aluminum-barium alloys, etc., but since the production of these alloys requires high-temperature smelting, the process consumes high energy and causes serious pollution

Method used

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  • Nano composite molten steel purifying agent and preparation method thereof
  • Nano composite molten steel purifying agent and preparation method thereof
  • Nano composite molten steel purifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The raw material and composition of nanocomposite molten steel cleaning agent are as follows in the present embodiment:

[0027] 10 parts of nano-SiC, 15 parts of silicon-calcium alloy powder (silicon 57.02% calcium 30.03%), K 2 O powder 10 parts, Na 2 10 parts of O powder, 5 parts of Mg powder, 5 parts of Ti powder, 5 parts of binder (99% glass water, 1wt% bentonite), 40 parts of iron powder; the particle size of nano-SiC is less than 50nm.

[0028] Preparation:

[0029] a, mixing nano-SiC and calcium-silicon alloy powder evenly to obtain mixture a;

[0030] b, the mixture a, K 2 O powder and Na 2 O powder is mixed evenly to obtain mixture b, and described mixture b is granular;

[0031] c. Mix the mixture b, Mg powder, Ti powder and iron powder uniformly to obtain mixture c, add binder to the mixture c, stir evenly, and finally briquetting.

[0032] Add the nanocomposite molten steel purifier prepared in this example into molten steel, the mass ratio of the nano...

Embodiment 2

[0034] The raw material and composition of nanocomposite molten steel cleaning agent are as follows in the present embodiment:

[0035] 10 parts of nano-SiC, 20 parts of silicon-calcium alloy powder (silicon 57.02% calcium 30.03%), K 2 O powder 10 parts, Na 2 10 parts of O powder, 5 parts of Mg powder, 5 parts of Ti powder, 5 parts of binder (99% glass water, 1wt% bentonite), 35 parts of iron powder; the particle size of nano-SiC is less than 50nm.

[0036] The preparation method of this embodiment is the same as that of Example 1.

[0037] Add the nanocomposite molten steel purifier prepared in this example into molten steel, the mass ratio of the nanocomposite molten steel purifier to molten steel is 1:2500, and blow argon gas from the bottom of the ladle into the ladle for 4-10 minutes (flow rate: 0.5-1Pa) , and then cast into shape.

Embodiment 3

[0039] The raw material and composition of nanocomposite molten steel cleaning agent are as follows in the present embodiment:

[0040] 10 parts of nano-SiC, 15 parts of silicon-calcium alloy powder (silicon 57.02% calcium 30.03%), K 2 O powder 15 parts, Na 2 15 parts of O powder, 5 parts of Mg powder, 5 parts of Ti powder, 5 parts of binder (glass water 99%, bentonite 1wt%), 30 parts of iron powder; the particle size of nano-SiC is less than 50nm.

[0041] The preparation method of this embodiment is the same as that of Example 1.

[0042] Add the nanocomposite molten steel purifier prepared in this example into molten steel, the mass ratio of the nanocomposite molten steel purifier to molten steel is 1:2000, and blow argon gas from the bottom of the ladle into the ladle for 4-10 minutes (flow rate: 0.5-1Pa) , and then cast into shape.

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Abstract

The invention discloses a nano composite molten steel purifying agent. The nano composite molten steel purifying agent comprises the following raw materials in percentage by mass: 3 to 10 percent of nano SiC, 10 to 20 percent of silico-calcium alloy powder, 4 to 15 percent of K2O powder, 5 to 16 percent of Na2O powder, 2 to 6 percent of Mg powder, 2 to 8 percent of Ti powder, 3 to 5 percent of a bonding agent and the balance of iron powder. A method for preparing the nano composite molten steel purifying agent includes: firstly mixing uniformly the nano SiC with the silico-calcium alloy powder to obtain a mixture a, then mixing uniformly the mixture a, the K2O powder and the Na2O powder to obtain a mixture b, then mixing uniformly the mixture b, the Mg powder, the Ti powder and the iron powder to obtain a mixture c, adding the bonding agent into the mixture c and stirring uniformly, finally briquetting and molding. The nano composite molten steel purifying agent can greatly improve the purification degree of molten steel, and the performance of a steel product treated by using the nano composite molten steel purifying agent is the same as that of the steel product purified by using a ladle furnace (LF), so that the nano composite molten steel purifying agent can replace the LF furnace used for refining, and the steelmaking cost can be greatly reduced.

Description

1. Technical field [0001] The invention relates to a molten steel purifying agent and a preparation method thereof, in particular to a nanocomposite molten steel purifying agent and a preparation method thereof, belonging to the technical field of metallurgy. 2. Background technology [0002] In order to improve various properties of metal materials, currently in the steelmaking industry mainly adopts AOD, VOD, LF several refining processes to achieve the purpose of purifying molten steel, in the foundry industry mainly adopts adding various purifying agents and rare earth metamorphism in molten steel agent to achieve the final deoxidation and purification of molten steel. [0003] Traditional molten steel purifiers usually use rare earth alloys, silicon-calcium alloys, silicon-aluminum-barium alloys, etc., but since the production of these alloys requires high-temperature smelting, the process consumes high energy and causes serious pollution. Especially after the country ...

Claims

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Application Information

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IPC IPC(8): C21C7/06B22F3/02
Inventor 张芬红姚永茂蔡健飞
Owner 成天有限公司
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