Long nozzle coating temperature adjusting system and method in continuous casting production

A technology of temperature regulation system and long nozzle, which is applied in casting equipment, casting melt container, manufacturing tools, etc., can solve the problems of lack of effective means for the stability of molten steel in tundish and large fluctuation of molten steel temperature in tundish. It is beneficial to the quality of steel smelting and the effect of small fluctuation of molten steel temperature

Active Publication Date: 2022-05-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the other hand, the stability of the molten steel temperature in the tundish is of great significance to the control of the superheat of molten steel, the segregation of the continuous casting slab and the control of the solidification structure. The temperature of the molten steel in the tundish fluctuates greatly, and there has been no effective means to control the stability of the molten steel in the tundish.

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  • Long nozzle coating temperature adjusting system and method in continuous casting production
  • Long nozzle coating temperature adjusting system and method in continuous casting production

Examples

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Effect test

Embodiment 1

[0045] In a continuous casting factory, the molten steel in ladle 1 is 100 tons, the length of the long nozzle 6 is 1450mm, the length of the upper bowl is 120mm, the outer diameter of the lower part of the bowl is 165mm, and the depth of the lower end of the molten steel during continuous casting is 200mm; The temperature jacket 7 is composed of two semicircular temperature regulating walls, with an inner diameter of 167mm, an outer diameter of 567mm and a length of 1000mm; the outer shell of the temperature regulating jacket and the upper and lower ends are welded by 3mm thick high-temperature stainless steel 310S, and the upper and lower ends of the stainless steel are welded by 310S. The outer diameter of the sheet is 567mm and the inner diameter is 169mm; a layer of refractory cotton 703 is placed close to the inner side of the stainless steel, with a refractoriness of 1200°C and a thickness of 20mm; the innermost layer is a lightweight alumina foam brick 704 with a refract...

Embodiment 2

[0049] In a continuous casting factory, the quality of molten steel in ladle 1 is 80 tons, the length of the long nozzle 6 is 1500 mm, the length of the upper bowl is 140 mm, the outer diameter of the lower part of the bowl is 150 mm, and the depth of the molten steel inserted at the lower end during continuous casting production is 250 mm; The shape thermostat 7 is composed of two semicircular thermostat walls, the inner diameter is 152mm, the outer diameter is 500mm, and the length is 950mm; The outer diameter of the stainless steel shell is 500mm and the inner diameter is 154mm; a layer of refractory cotton 703 is placed close to the inner side of the stainless steel shell, with a refractoriness of 1200°C and a thickness of 20mm; the innermost layer is a lightweight alumina foam brick 704 with a thickness of 151mm , the length is 904mm; the alumina foam brick is close to the side of the long nozzle, inlaid with iron-chromium-aluminum resistance wire, and the heating power is...

example 3

[0053] In a continuous casting factory, the mass of molten steel in ladle 1 is 120 tons, the length of the long nozzle 6 is 1400 mm, the length of the upper bowl is 130 mm, the outer diameter of the lower part of the bowl is 160 mm, and the depth of the lower end of the molten steel inserted during continuous casting production is 230 mm; The shape temperature regulating sleeve 7 is composed of two semicircular temperature regulating walls, the inner diameter is 162mm, the outer diameter is 500mm, and the length is 1000mm; The outer diameter of the stainless steel sheet is 500mm and the inner diameter is 164mm; a layer of refractory cotton 703 is placed close to the inner side of the stainless steel shell, with a refractoriness of 1200°C and a thickness of 20mm; the innermost layer is a lightweight alumina foam brick 704 with a refractoriness of 1650℃, thickness is 147mm, length is 956mm.

[0054] Before the continuous casting production starts, preheat the temperature regulat...

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Abstract

The invention provides a long nozzle coating and temperature adjusting system and method in continuous casting production, relates to the technical field of steel smelting, and aims to perform coating and temperature adjusting on a long nozzle in the continuous casting process, so that too fast temperature reduction when molten steel passes through the long nozzle in the continuous casting production can be avoided, and low-temperature smelting in steelmaking-continuous casting production is realized; blowing cooling can be carried out when the temperature of the molten steel is high, the superheat degree of the molten steel is reduced, and the casting blank solidification structure is improved; the system comprises a temperature adjusting sleeve, a mechanical arm, a data acquisition unit and a control unit, the temperature adjusting sleeve is arranged on the periphery of the long nozzle; the mechanical arm is connected with the temperature adjusting sleeve and used for controlling the action of the temperature adjusting sleeve; the control unit is connected with the mechanical arm and the data acquisition unit and used for controlling the mechanical arm to work according to data acquired by the data acquisition unit. The temperature adjusting sleeve is of a combined tubular structure and comprises two semicircular temperature adjusting walls. The two semicircular temperature adjusting walls are connected with the mechanical arms correspondingly, and movement, positioning, cohesion opening, blowing cooling and other actions are achieved under the control of the mechanical arms.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a temperature regulation system and method for covering a long nozzle in continuous casting production. Background technique [0002] With the increasingly stringent requirements for reducing carbon dioxide emissions, the significance of low-temperature smelting in converters and refining is becoming more and more important. Correspondingly, reducing the temperature drop in the smelting and continuous casting process is of great significance, especially the significance of reducing the temperature drop in the continuous casting process, which can significantly reduce the molten steel temperature in the previous steelmaking and refining process, thereby significantly reducing the energy consumption and material consumption, and significantly improve the quality of steel. [0003] On the other hand, the stability of the molten steel temperature in the tundish is of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/60B22D11/18
CPCB22D41/60B22D11/182Y02P10/20
Inventor 刘建华徐浩何杨郝勇飞
Owner UNIV OF SCI & TECH BEIJING
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