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Square billet ultra-low carbon steel continuous casting functional protection material

A technology for protecting materials and ultra-low carbon steel, which is applied in the field of metallurgical auxiliary materials and can solve problems such as bonding

Inactive Publication Date: 2010-01-20
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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AI Technical Summary

Problems solved by technology

[0010] The invention provides a billet ultra-low carbon steel continuous casting functional protection material which solves the problem of slag inclusion and sticky slag on the surface of the bonded leakage steel slab in continuous casting of ultra-low carbon steel

Method used

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Embodiment Construction

[0014] A billet ultra-low carbon steel continuous casting functional protective material, the functional protective material includes the following ingredients: wollastonite, barium carbonate, sodium carbonate, fluorite, manganese ore powder, bauxite powder, carbon black, iron mud , bentonite, quartz powder, its mass percent is respectively 53.5%, 1.5%, 7%, 15%, 5%, 7%, 5%, 4%, 2%.

[0015] Among the continuous casting functional protective materials li 2 The mass percentage of O is 0-1.0%, the mass percentage of MnO is 1.0-2.5%, the mass percentage of MgO is 0.7-3.0%, Fe 2 The mass percentage of O is 0.7-1.5%, and the binary alkalinity (CaO / SiO 2 ) is 0.9~1.0; the rest is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - 、K 2 O, its mass percentage is respectively: 32~37%, 31.5~35.5%, 4.5~6.5%, 4~6%, 4~6%, 0~0.5%.

[0016] The carbon content of the billet ultra-low carbon steel is generally required to be less than 0.03%, and there is no peritectic reaction during the solidification...

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Abstract

The invention discloses a square billet ultra-low carbon steel continuous casting functional protection material. The raw material of the functional protection material comprises the following components: wollastonite, barium carbonate, sodium carbonate, fluorite, manganese powder, alumina powder, carbon black, iron cement, bentonite and quartz powder, and the quality percentages of the components are respectively 53.5%, 1.5%, 7%, 15%, 5%, 7%, 5%, 4% and 2%. The invention innovates and improves the formula thereof, using a special composite component to ensure fast slagging speed, and can fast and timely supplement liquid slag consumption; the thickness of slag film between a crystallizer wall and a blank shell is suitable and is uniformly distributed, thereby preventing the blank shell from directly contacting with the crystallizer wall so as to reduce friction and ensure even mold heat dissipation of the crystallizer, thereby preventing the slag from sticking leakage steel and preventing the surface of a casting blanking from generating defects.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, in particular to a billet ultra-low carbon steel continuous casting functional protection material. Background technique [0002] With the advancement of science and technology, continuous casting technology has gradually matured. Due to the continuous improvement of steelmaking technology, the pace of steelmaking has accelerated, and the proportion of high-quality steel grades, low-carbon, and ultra-low-carbon pure steel grades has increased. Therefore, research and development and the corresponding continuous casting mold powder technology have always been important. The focus of work that continuous casting workers care about. [0003] The 1# and 2# machines of WISCO No. 1 steelmaking are all six machines and six streams, and the casting section is 198×198mm2, and the normal casting speed is 1.0-2.0m / min. 0.6-0.8m / min. To adapt to the conditions of three continuous ...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 李书成李伟峰
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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