Continuous casting mold flux for stainless steel and preparation method thereof

A technology for continuous casting of mold flux and stainless steel, applied in the field of metallurgical materials, can solve the problems of increasing the difficulty of circulating water treatment, the cost of neutralizing agent, the increase of equipment maintenance costs, the increase of concentration and PH value, etc., and achieves good subcutaneous and internal quality, Good lubrication effect and stable melting effect

Active Publication Date: 2021-05-18
洛阳科丰冶金新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As we all know, fluorine is a toxic element, which produces a large amount of fluoride gas that is harmful to the environment during the melting process. Not only that, the increase in fluoride ion concentration and pH value greatly accelerates the corrosion rate of continuous casting equipment, increases equipment maintenance costs, and increases Increased the difficulty of circulating water treatment and the cost of neutralizers, increased the burden of sewage discharge

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] Another object of the present invention is to provide a method for preparing the above-mentioned continuous casting mold flux for stainless steel, which method comprises the following steps:

[0034] S1: In terms of parts by weight, weigh 5.0-7.0 parts by weight of glass powder, 40.0-55.0 parts by weight of wollastonite, 3.0-4.5 parts by weight of carbon black, 5.0-9.0 parts by weight of cement clinker, 3.0 parts by weight ~5.0 parts by weight of calcite, 5.0~7.0 parts by weight of soda water, 8.0~12.0 parts by weight of bauxite, 2.5~5.5 parts by weight of calcite, 6.0~8.0 parts by weight of albite, 1.0~2.0 parts by weight A binder in parts by weight and 3.0 to 12.0 parts by weight of cerium carbonate are mixed to obtain raw material powder;

[0035] S2: After pulverizing the raw material powder, add clear water and perform ball milling to obtain ball milling powder;

[0036] S3: Put the ball mill powder into the melting furnace for melting at 1390°C to 1410°C, then wa...

Embodiment 1

[0042] S1: In terms of parts by weight, weigh 5.2 parts by weight of glass powder, 42.5 parts by weight of wollastonite, 3.0 parts by weight of carbon black, 5.0 parts by weight of cement clinker, 3.0 parts by weight of calcite, and 5.0 parts by weight soda water, bauxite of 8.5 parts by weight, magnesia of 2.5 parts by weight, albite of 6.0 parts by weight, binding agent of 1.5 parts by weight, cerium carbonate of 3.0 parts by weight, mix, obtain raw material powder;

[0043] S2: After pulverizing the raw material powder, add clear water and perform ball milling to obtain ball milling powder;

[0044] S3: Put the ball mill powder into a liningless melting furnace with water-cooled furnace walls for melting at 1400°C, then water quench, dry, and pulverize to obtain the melted powder;

[0045] S4: In terms of parts by weight, 1.2 parts by weight of graphite is added to the melted powder, and the melted powder is granulated in a spray granulation tower to obtain hollow granular ...

Embodiment 2

[0052] In the present embodiment S1, according to parts by weight, respectively weigh 5.7 parts by weight of glass powder, 44.5 parts by weight of wollastonite, 3.0 parts by weight of carbon black, 5.2 parts by weight of cement clinker, and 3.2 parts by weight of calcite, The soda water of 5.5 parts by weight, the bauxite of 9.0 parts by weight, the magnesia of 2.7 parts by weight, the albite of 6.0 parts by weight, the graphite of 1.0 parts by weight, the binding agent of 1.5 parts by weight, the Cerium carbonate is mixed to obtain raw material powder; other steps are the same as in Example 1.

[0053] The continuous casting mold flux for stainless steel prepared in this example is detected. In parts by weight, the chemical composition in the continuous casting mold flux for stainless steel includes 32.9 parts by weight of CaO, 26.7 parts by weight of SiO 2 , 3.5 parts by weight Al 2 o 3 , 6.7 parts by weight of Na 2 O, 4.3 parts by weight Ce 2 o 3 , 0.7 parts by weight ...

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Abstract

The invention provides a continuous casting mold flux for stainless steel and a preparation method thereof, and relates to the technical field of metallurgical materials. The chemical components in the continuous casting mold flux for stainless steel include 31.9 to 36.3 parts by weight of CaO, 25.4 parts by weight. ~29.6 parts by weight of SiO 2 , 3.0-6.0 parts by weight of Al 2 o 3 , 6.5-7.5 parts by weight of Na 2 O, 3.0-12.0 parts by weight of Ce 2 o 3 , 0.5-2.0 parts by weight of MgO, greater than 0 and less than or equal to 2.0 parts by weight of Fe 2 o 3 , 1.0-3.0 parts by weight of C, 11.0-15.0 parts by weight of volatile matter. The continuous casting mold slag for stainless steel provided by the invention can make the surface of the poured duplex stainless steel slab clean up to more than 98%, and the subcutaneous and internal quality of the duplex stainless steel slab is good.

Description

technical field [0001] The invention relates to the technical field of metallurgical materials, in particular to a continuous casting mold flux for stainless steel and a preparation method thereof. Background technique [0002] Stainless steel refers to steel resistant to weak corrosive media such as air, steam, water, and chemically corrosive media such as acid, alkali, and salt. It is also called stainless acid-resistant steel, which mainly includes austenite, ferrite, martensite and Duplex stainless steel, etc. Because stainless steel has many excellent properties, it is widely used in industries such as energy and environmental protection, chemical petroleum and nuclear power. [0003] Continuous casting mold slag is a powdery or small granular steelmaking auxiliary material, which is used to cover the surface of molten steel in the crystallizer of the continuous casting machine, and plays a good role in heat insulation. On the one hand, it prevents the surface of molte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111B22D11/108
CPCB22D11/108B22D11/111
Inventor 徐旭松许孟然刘晓叶超孙志英曹清林
Owner 洛阳科丰冶金新材料有限公司
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