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Tundish covering agent for ultra-low carbon steel

A technology of ultra-low carbon steel and covering agent, which is applied in the field of steelmaking and continuous casting, which can solve the problems of poor thermal insulation performance and difficulty in continuous casting of ultra-low carbon molten steel, and achieve low carbon content, strong adsorption of inclusions, and small erosion Effect

Active Publication Date: 2016-08-17
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a tundish covering agent for ultra-low carbon steel, which mainly solves the technical problem that the high-alkalinity tundish covering agent in the prior art has poor thermal insulation performance and is difficult to meet the continuous casting of ultra-low carbon molten steel

Method used

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  • Tundish covering agent for ultra-low carbon steel
  • Tundish covering agent for ultra-low carbon steel

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Embodiment Construction

[0030] A tundish covering agent for ultra-low carbon steel, the weight percent of which is composed of: CaO 40-60%, MgO 5-15%, Al 2 o 3 15-30%, SiO 2 8~20%, Ce 2 o 3 1-6%, Cfigure 1 , the embodiment of the present invention is shown in Table 1.

[0031] Table 1 Covering agent of the present invention (% by weight), the balance is unavoidable impurities.

[0032]

[0033]

[0034] The covering agent of the present invention has good thermal insulation performance and spreadability, and the covering agent melts evenly in the tundish and is not easy to crust, and meanwhile, the high-alkalinity covering agent has excellent ability of absorbing inclusions and purifying molten steel.

[0035] The physical properties of the covering agent of the present invention are that the melting point (hemispherical point temperature) is 1330-1360 DEG C; the viscosity at 1400 DEG C is 0.18-0.25 Pa·S.

[0036] In addition to the above-mentioned embodiments, the present invention can also...

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Abstract

The invention relates to a tundish covering agent for ultra-low carbon steel, belonging to the technical field of steelmaking and continuous casting. The invention mainly solves the technical problem that the high-alkalinity tundish covering agent in the prior art has poor thermal insulation performance and is difficult to meet the continuous casting of ultra-low carbon molten steel. The technical solution adopted in the present invention is: a tundish covering agent for ultra-low carbon steel, the weight percentage of which is composed of: CaO 40-60%, MgO 5-15%, Al 2 o 3 15~30%, SiO 2 8~20%, Ce 2 o 3 1~6%, C<1%, and the rest are unavoidable impurities. The invention is mainly used for heat insulation and heat preservation of molten steel in a tundish when a slab caster casts ultra-low carbon molten steel, and for absorbing inclusions in molten steel.

Description

technical field [0001] The present invention relates to a covering agent for tundish in the production of molten steel cast by a slab caster, in particular to a tundish covering agent for ultra-low carbon steel, which is mainly used for the protection of molten steel in a tundish when a slab caster casts ultra-low carbon molten steel The invention relates to heat insulation and heat preservation, and adsorption of inclusions in molten steel, belonging to the technical field of steelmaking and continuous casting. Background technique [0002] The tundish covering agent covers the molten steel surface in the tundish during the continuous casting process. Its main functions are: (1) heat insulation and heat preservation, preventing excessive temperature drop of molten steel and crusting of the molten steel surface during casting; (2) isolation of air , to prevent secondary oxidation of molten steel; (3) adsorption of inclusions floating to the surface of molten steel. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111B22D1/00
Inventor 倪修华江中块彭世恒洪建国张发斌
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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