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Nano molten steel purifying agent and preparation method thereof

A purification agent and nanotechnology, which is applied in the field of metallurgy and smelting purification, can solve the problems of difficulty in adding nanoparticles and restricting the application of nanomaterials, and achieve the effects of reducing production processes, improving mechanical properties, and increasing yield

Inactive Publication Date: 2016-04-27
王永妍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unique properties of nanomaterials, how to add nanoparticles to steel liquid has always been a very difficult issue, which also restricts the application of nanomaterials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw material and composition of nanometer molten steel purifying agent are as follows in the present embodiment:

[0023] 8 parts of nano-SiC, 15 parts of silicon aluminum alloy powder, K 2 O powder 11 parts, Na 2 O powder 5 parts, BaO powder 8 parts, CaCO 3 Powder 5 parts, CaF 2 6 parts of magnesium powder, 3 parts of Mg powder, 6 parts of titanium iron powder, 35 parts of iron powder, 3 parts of hydroxycellulose, and 4 parts of water.

[0024] Preparation:

[0025] Step 1, uniformly mixing nano-SiC and silicon-aluminum alloy powder to form mixed powder a;

[0026] Step 2, the mixed powder a, K obtained in step 1 2 O powder, Na 2 O powder, BaO powder CaCO 3 Powder and CaF 2 The powder is mixed evenly to form a mixed powder b;

[0027] Step 3, mix the mixture b, Mg powder, titanium iron powder and iron powder uniformly to form a mixed particle c, add hydroxyl cellulose and water to the mixed particle c and stir evenly, and finally cool the stirred mixed par...

Embodiment 2

[0030] The raw material and composition of nanometer molten steel purifying agent are as follows in the present embodiment:

[0031] 8 parts of nano-SiC, 20 parts of silicon aluminum alloy powder, K 2 O powder 10 parts, Na 2 O powder 10 parts, BaO powder 10 parts, CaCO 3 Powder 5 parts, CaF 2 6 parts of Mg powder, 5 parts of Mg powder, 6 parts of titanium iron powder, 40 parts of iron powder, 5 parts of hydroxycellulose, and 4 parts of water.

[0032] The preparation method of this embodiment is the same as that of Example 1.

[0033] Add the nanometer molten steel cleaning agent prepared by the present embodiment into molten steel, add the nanometer molten steel cleaning agent by 0.4% of the molten steel weight, blow argon gas from the bottom of the ladle to the ladle for 4-10 minutes (flow rate 0.5-1Pa), and then cast forming.

Embodiment 3

[0035] The raw material and composition of nanometer molten steel purifying agent are as follows in the present embodiment:

[0036] 8 parts of nano-SiC, 10 parts of silicon-aluminum alloy powder, K 2 O powder 5 parts, Na 2 O powder 5 parts, BaO powder 5 parts, CaCO 3 Powder 5 parts, CaF 2 5 parts of Mg powder, 5 parts of Mg powder, 3 parts of titanium iron powder, 30 parts of iron powder, 5 parts of hydroxycellulose, and 2 parts of water.

[0037] The preparation method of this embodiment is the same as that of Example 1.

[0038] Add the nanometer molten steel cleaning agent prepared by the present embodiment into molten steel, add the nanometer molten steel cleaning agent by 0.5% of the molten steel weight, blow argon gas from the bottom of the ladle to the ladle for 4-10 minutes (flow rate 0.5-1Pa), and then cast forming.

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Abstract

The invention discloses a nano molten steel purifying agent which comprises the following raw materials in part by mass: 2-8 parts of nano SiC2, 10-20 parts of silicon-aluminum alloy powder, 5-16 parts of K2O powder, 3-12 parts of Na2O powder, 5-12 parts of BaO powder, 3-10 parts of CaCO3 powder, 5-8 parts of CaF2 powder, 2-5 parts of Mg powder, 2-6 parts of ferrotitanium powder, the rest of iron powder, 3-8 parts of hydroxypropyl-cellulose and 2-4 parts of water. The nano molten steel purifying agent has the functions of slagging, deoxygenation, desulfuration and dephosphorization, greatly reduces included slag, air holes and cold shut defects in the molten steel, greatly improves the purification degree of molten steel, increases the rate of finished products of products in the steel rolling process, increases the internal and external quality of steel, and effectively removes surface cracks. Under the premise of retaining the original standard requirement, the functions of part of purification equipment are omitted, the steelmaking cost is reduced, the equipment investment is saved, the production processes are reduced, and the energy consumption per unit molten steel is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgical smelting purification, in particular to a nanometer molten steel purifying agent and a preparation method thereof. Background technique [0002] It is well known that the demand for steel in the market is very large. With the development of the steel industry, the quality requirements for steel products are getting higher and higher, and the purity of molten steel is also higher. During the smelting process of molten steel, due to scrap steel , ferroalloy, refractory materials, etc. bring in a large amount of impurities and harmful gases, especially high alloy steel, stainless steel, heat-resistant steel, which contain high Cr, Ni, Mo, Nb, Ti and other elements, and most steel grades contain The carbon content is very low, so it is difficult to deoxidize and degas during the smelting process. The inclusions (oxides, sulfides, etc.) produced in the steel are not easy to float up and are diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064
CPCC21C7/06C21C7/0006C21C7/0025C21C7/0645C21C2007/0031
Inventor 王永妍
Owner 王永妍