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Special covering slag for auto sheet CSP sheet billet

A technology of mold slag and thin slab, which is applied in the field of auxiliary materials, can solve the problems of not effectively reducing the original performance of slag, poor surface quality of steel billets, deep creases, etc., and achieve the goal of improving vitrification characteristics, improving billet quality, and absorbing inclusions Effect

Inactive Publication Date: 2016-03-23
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above-mentioned mold slag is used for thin casting of automobile slabs, it cannot effectively reduce the combination of inclusions in molten steel and molten slag, which deteriorates the original performance of the slag, resulting in problems such as poor surface quality, deep creases, and dents in the billet.

Method used

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  • Special covering slag for auto sheet CSP sheet billet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A special mold flux for CSP thin slabs of automobile sheets, which is made of the following raw materials in terms of mass percentage: 67.0% of premelt, 9.0% of fine glass powder, 4.0% of manganese carbonate, 10.0% of fluorite, and 4.0% of sodium fluoride , cryolite 3.0%, lithium carbonate 1.0%, carbon black 2.0%, the chemical composition and mass percentage of the premelt are: SiO 2 27.0%, CaO45.0%, Na 2 O7.5%, F - 8.5%, MgO12.0%. The chemical composition and mass percentage of the special mold flux for CSP thin slabs of automobile sheets are SiO 2 30.0%, CaO30.0%, Al 2 o 3 9.0%, Na 2 O5.5%, F - 9.0%, Mn3.0%, Fe 2 o 3 0.5%, MgO10.0%, Li 2 CO 3 3.0%.

[0022] A preparation method of special mold flux for CSP thin slabs of automobile plates is as follows: weigh premelt, fine glass powder, manganese carbonate, fluorite, sodium fluoride, cryolite, lithium carbonate, carbon black in proportion, and crush all raw materials to 100 mesh, dried at 200°C, pre-melted ...

Embodiment 2

[0024] A special mold flux for CSP thin slabs of automobile sheets, made of the following raw materials in terms of mass percentage: 65.0% of premelt, 9.0% of fine glass powder, 2.0% of manganese carbonate, 13.0% of fluorite, and 4.0% of sodium fluoride , cryolite 2.0%, lithium carbonate 3.0%, carbon black 2.0%, the chemical composition and mass percentage of the premelt are: SiO 2 28.0%, CaO44.0%, Na 2 O8.5%, F - 7.5%, MgO12.0%. The chemical composition and mass percentage of the special mold flux for CSP thin slabs of automobile sheets are SiO 2 37.0%, CaO25.0%, Al 2 o 3 14.0%, Na 2 O3.5%, F - 6.0%, Mn4.0%, Fe 2 o 3 4.0%, MgO5.5%, Li 2 CO 3 1.0%.

[0025]A preparation method of special mold flux for CSP thin slabs of automobile plates is as follows: weigh premelt, fine glass powder, manganese carbonate, fluorite, sodium fluoride, cryolite, lithium carbonate, carbon black in proportion, and crush all raw materials to 150 mesh, dried at 150°C, mixed evenly, pre-mel...

Embodiment 3

[0027] A special mold flux for CSP thin slabs of automobile sheets, which is made of the following raw materials in terms of mass percentage: 69.0% of premelt, 7.0% of fine glass powder, 4.0% of manganese carbonate, 12.0% of fluorite, and 3.0% of sodium fluoride , cryolite 2.0%, lithium carbonate 2.0%, carbon black 1.0%, the chemical composition and mass percentage of the premelt are: SiO 2 32.0%, CaO42.0%, Na 2 O6.5%, K 2 O4.0%, F - 6.5%, MgO9.0%. The chemical composition and mass percentage of the special mold flux for CSP thin slabs of automobile sheets are SiO 2 36.0%, CaO28.0%, Al 2 o 3 8.0%, Na 2 O3.5%, F - 6.0%, Mn3.0%, Fe 2 o 3 3.5%, MgO9.0%, Li 2 CO 3 3.0%.

[0028] A preparation method of special mold flux for CSP thin slabs of automobile plates is as follows: weigh premelt, fine glass powder, manganese carbonate, fluorite, sodium fluoride, cryolite, lithium carbonate, carbon black in proportion, and crush all raw materials to 150 mesh, dry at 250°C, pre...

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Abstract

The invention discloses special covering slag for an auto sheet CSP sheet billet. The special covering slag comprises the following raw materials, by mass, of 65.0%-75.0% of premelting materials, 5.0%-9.0% of fine glass powder, 2.0%-4.0% of manganese carbonate, 10.0%-13.0% of fluorite, 1.0%-2.0% of lithium carbonate, 2.0%-4.0% of sodium fluoride, 2.0%-4.0% of cryolite and 1.0%-2.0% of carbon black. According to the special covering slag for the auto sheet CSP sheet billet, the inclusions in molten slag are effectively balanced, and the vitrification characteristic and melting uniformity of the covering slag are improved; by using the excellent skeleton effect of the imported carbon black, the melting speed and melting structure of the covering slag are controlled, the liquid slag can uniformly, quickly and moderately flow into the clearance between a billet shell and a crystallizer, and the quality of the steel billet is improved.

Description

technical field [0001] The invention relates to an auxiliary material used in a continuous casting process, in particular to a special mold flux for CSP thin slabs of automobile plates. Background technique [0002] With the development of market economy and the continuous improvement of people's material life, my country's automobile market continues to develop, and the demand and performance requirements for automobile sheets are also increasing. Automotive sheets must have high strength, high toughness, fatigue resistance, lamellar tear resistance, good weldability, corrosion resistance, and good cold workability. CSP is one of thin slab continuous casting and rolling technologies. It has the advantages of compact process, less investment, and low energy consumption. Among them, the continuous casting mold powder plays an irreplaceable role in the quality of the casting slab and the smooth progress of the continuous casting process. [0003] The Chinese patent applicatio...

Claims

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Application Information

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IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 李伟锋李书成范李飞宋志刚余海洋
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP