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ASP medium thickness slab high drawing speed plate blank low-carbon steel continuous casting functional protective material

A protection material, high pulling speed technology, applied in the field of metallurgical auxiliary materials, to achieve stable operation performance, good absorption of molten steel floating inclusions, and reduce friction.

Active Publication Date: 2010-02-03
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an ASP medium-thin-slab high-speed slab low-carbon steel continuous casting functional protection material that solves the problems of cohesive breakout, slag inclusion and sticky slag on the slab surface in high-speed continuous casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A functional protective material for continuous casting of low-carbon steel with medium-thin plate and high-speed slab in ASP. The raw materials of the functional protective material include wollastonite, cryolite, sodium carbonate, fluorite, clinker, lithium limestone, magnesia, and carbon black , bentonite, its mass percent content is respectively 42%, 7%, 14%, 8.5%, 2.4%, 10%, 2.3%, 9%, 4.8%.

[0017] Li in functional protective materials 2 The mass percentage of O is 0.8-1.2%, the mass percentage of MgO is 3.0-5.0%, Fe 2 o 3 The mass percentage content is 0.7 ~ 1.5%, the binary alkalinity (CaO / SiO 2 ) is 0.93~0.97, and the rest is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , where SiO 2 The mass percentage of CaO is 28.0-34.0%, the mass percentage of CaO is 27.0-33.0%, Al 2 o 3The mass percentage content is 0~5.0%, Na 2 The mass percentage of O is 9-10%, F - The mass percentage content is 6.0~7.0%, k 2 The mass percent content of O is 0-0.5%.

Embodiment 2

[0019] A functional protective material for continuous casting of low-carbon steel in low-carbon steel with thin plate and high casting speed in ASP. The raw materials of the functional protective material include wollastonite, cryolite, sodium carbonate, fluorite, clinker, lithium limestone, magnesia, and carbon black , bentonite, its mass percent content is respectively 49%, 6%, 12%, 7.5%, 2%, 9.50%, 2.0%, 8%, 4%.

[0020] Li in functional protective materials 2 The mass percentage of O is 0.8-1.2%, the mass percentage of MgO is 3.0-5.0%, Fe 2 o 3 The mass percentage content is 0.7 ~ 1.5%, the binary alkalinity (CaO / SiO 2 ) is 0.93~0.97, and the rest is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F, of which SiO 2 The mass percentage of CaO is 28.0-34.0%, the mass percentage of CaO is 27.0-33.0%, Al 2 o 2 The mass percentage content is 0~5.0%, Na 2 The mass percentage of O is 9-10%, F - The mass percentage content is 6.0~7.0%, k 2 The mass percent content of O is 0-0.5%.

Embodiment 3

[0022] A functional protective material for continuous casting of low-carbon steel in low-carbon steel with thin plate and high casting speed in ASP. The raw materials of the functional protective material include wollastonite, cryolite, sodium carbonate, fluorite, clinker, lithium limestone, magnesia, and carbon black , bentonite, its mass percent content is respectively 57%, 4%, 10%, 6%, 1.7%, 9.2%, 1.8%, 7%, 3.3%.

[0023] Li in functional protective materials 2 The mass percentage of O is 0.8-1.2%, the mass percentage of MgO is 3.0-5.0%, Fe 2 o 3 The mass percentage content is 0.7 ~ 1.5%, the binary alkalinity (CaO / SiO 2 ) is 0.93~0.97, and the rest is SiO 2 , CaO, Al 2 o 3 、Na 2 O, F - , where SiO 2 The mass percentage of CaO is 28.0-34.0%, the mass percentage of CaO is 27.0-33.0%, Al 2 o 3 The mass percentage content is 0~5.0%, Na 2 The mass percentage of O is 9-10%, F - The mass percentage content is 6.0~7.0%, k 2 The mass percent content of O is 0-0.5%.

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Abstract

The invention discloses an ASP medium thickness slab high drawing speed plate blank low-carbon steel continuous casting functional protective material which comprises the components by weight percent:1.0-1.5% of Li2O, 3.0-5.0% of MgO, 0.7-1.5% of Fe2O3, 0.93-0.97% of CaO / SiO2 and the rest of SiO2, CaO, Al2O3, Na2O, F and K2O. The material solves the problems that high drawing speed plate blank continuous casting low-carbon steel has a thin liquid slag layer, poor lubrication, breakout by sticking, casting blank surface slag inclusion and sticky residue quality in the prior art. Protective slag has good spreadability, heat preservation and melting property in a crystallizer; the four sides inside the crystallizer are stable and even in capacity of heat transmission; the thickness of the liquid slag layer is 8-12mm; furthermore, the protective material has fewer slag strips, good lubricating property of the protective slag, prevents the breakout by sticking, and has no slag inclusion and sticky residue on the surface of casting blank as well as good casting blank surface quality.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and in particular relates to a functional protection material for continuous casting of low-carbon steel slabs with thin plates and high casting speeds in ASP. Background technique [0002] With the advancement of science and technology, continuous casting technology has gradually matured. However, due to the continuous improvement of steelmaking technology, the pace of steelmaking has accelerated, and the amount of steel tapping from the furnace has increased. Compared with steelmaking and subsequent steel rolling capabilities, the production capacity of continuous casting machines is still a restrictive link in the entire steel production process. . For this reason, in recent years, iron and steel enterprises at home and abroad have generally adopted high-efficiency continuous casting technology. The so-called high-efficiency continuous casting usually refers to the ...

Claims

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Application Information

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