Continuous casting mold fluxes for stainless steel and preparation method of fluxes

A continuous casting mold slag and stainless steel technology, applied in the field of metallurgical materials, can solve the problems of increasing the difficulty of circulating water treatment, the cost of neutralizer, the increase of equipment maintenance costs, the increase of concentration and pH value, etc., and achieve good subcutaneous and internal quality, Good lubricating effect and stable melting effect

Active Publication Date: 2019-12-27
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

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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 continuous casting mold fluxes for stainless steel and a preparation method of the fluxes, and relates to the technical field of metallurgical materials. The continuous castingmold fluxes comprise the following chemical compositions in parts by weight: 31.9-36.3 parts of CaO, 25.4-29.6 parts of SiO2, 3.0-6.0 parts of Al2O3, 6.5-7.5 parts of Na2O, 3.0-12.0 parts of Ce2O3, 0.5-2.0 parts of MgO, larger than 0 and less than or equal to 2.0 parts of Fe2O3, 1.0-3.0 parts of C, and 11.0-15.0 parts of volatile components. According to the continuous casting mold fluxes for stainless steel, the non-cleaning rate of the surface of the cast duplex stainless steel casting slab can reach above 98%, and the quality of the duplex stainless steel casting slab is good under the skinand inside.

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 that is resistant to weak corrosive media such as air, steam and water and chemically corrosive media such as acid, alkali and salt, also known as stainless acid-resistant steel, which mainly includes austenite, ferrite, martensite and Duplex stainless steel, etc. Due to its many excellent properties, stainless steel is widely used in energy and environmental protection, chemical petroleum and nuclear power industries. [0003] Continuous casting mold powder is a kind of powder or small granular steel-making auxiliary material, which is used to cover the surface of molten steel in the mold of continuous casting machine, and plays a good role in thermal insulation. On the other hand, it can also ensure the good surface...

Claims

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Application Information

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Patent Type & Authority Applications(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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