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Method for assembling tundish prestressing force applying mechanism and preparation technology of downwarping-preventing tundish

An assembly method and a tundish technology, which are applied in the field of iron and steel metallurgical continuous casting, can solve problems such as deflection and deformation, and achieve the effects of improving service life, avoiding excessive temperature, and increasing continuous casting furnaces

Active Publication Date: 2017-05-31
河南济源钢铁(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiency that the continuous casting tundish is prone to deflection deformation in the prior art, and to provide a method for assembling the prestress applying mechanism of the tundish. By assembling the prestress applying mechanism, the deflection deformation of the tundish can be controlled, Further, the service life of the tundish can be improved; a preparation process for an anti-slip tundish is provided, and the deflection deformation of the tundish can be controlled by assembling a prestressing mechanism at the lower part of the prepared tundish

Method used

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  • Method for assembling tundish prestressing force applying mechanism and preparation technology of downwarping-preventing tundish

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Effect test

Embodiment 1

[0053] Such as Figure 5 As shown, an assembly method of a tundish prestressing mechanism in this embodiment:

[0054] (1) Preparation of concrete

[0055] The quality of each component is as follows: 45kg of cement, 35kg of refractory aggregate, 10kg of filler, 13kg of additive, 1kg of antirust agent, 1kg of water reducing agent, and 5kg of water to obtain the mixture, and add the mixture to the mixer and stir for 10-20min. Obtain refractory concrete slurry after stirring evenly;

[0056] Wherein the above cement is C60 Portland cement, the filler is composed of copper powder and crushed stone, and the ratio of copper powder and crushed stone is 1:1, the copper powder is deoxidized copper powder, and the particle size of the filler is 3 ~10mm continuously graded granular material, the additives are composed of water glass and sodium fluorosilicate, the masses are respectively 8 kg of water glass and 5 kg of sodium fluorosilicate. The refractory aggregate is composed of zir...

Embodiment 2

[0096] The basic content of this embodiment is the same as that of Embodiment 1, except that the 10-strand billet continuous casting machine of 3#10 machine of a certain company’s No. 1 and Table 2, it can be seen that the distance between the centers of steel bar sleeves 212 is 100 mm, and the diameter of steel bar sleeves 212 is The diameter of the prestressed steel bar 220 is The deformation of the designed prestress applying mechanism 200 is D=70mm, and the designed prestress of the prestress applying mechanism 200 is 500MPa.

[0097] A method of applying prestress to control the deflection of the tundish in this embodiment: each component of the heat-resistant concrete is composed of the following parts by mass: 43 kg of cement, 25 kg of refractory aggregate, 5 kg of filler, 8 kg of additive, 1 kg of antirust agent, and Aqua 1kg, water 5kg; Wherein the above-mentioned cement is C60 portland cement, and described filler is to be made up of copper powder, converter wind-...

Embodiment 3

[0104] The basic content of this embodiment is the same as that of Embodiment 1, except that the components of the heat-resistant concrete are composed according to the following mass parts: 40 kg of cement, 30 kg of refractory aggregate, 8 kg of filler, 15 kg of additive, 1 kg of antirust agent, water reducing agent Agent 1kg, water 5kg; Wherein the above-mentioned cement is C60 portland cement, and described filler is made up of copper powder, blast furnace slag, crushed stone, and ratio is 1:1:1, and described copper powder is deoxidized copper powder, the particle size of the filler is continuously graded from 3 to 10 mm, and the additives are composed of water glass and sodium fluorosilicate, and the masses are 9 kg of water glass and 6 kg of sodium fluorosilicate.

[0105] When the tundish of this embodiment is used for continuous casting, the number of continuous casting furnaces reaches 58 furnaces. The tundish of this embodiment does not have bad plastic deformation, ...

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Abstract

The invention discloses a method for assembling a tundish prestressing force applying mechanism and a preparation technology of a downwarping-preventing tundish, and belongs to the technical field of steel metallurgy continuous casting. The method includes the steps that (1) concrete is prepared, and concrete components are mixed and stirred to obtain heat-resistant concrete slurry; (2) the prestressing force applying mechanism is poured, the heat-resistant concrete slurry is poured into a shaping tank, then prestressed steel bars are mounted into corresponding steel bar sleeves, and the prestressing force applying mechanism is curved to generate deflection; and (3) installation is performed to apply prestressing force in a matched mode, the prestressing force applying mechanism is installed on the lower portion of a tundish main body, the arc-shaped top of the prestressing force applying mechanism makes contact with a tundish base plate so that installation can be completed, and the downwarping-preventing tundish can be obtained by means of preparation after the tundish prestressing force applying mechanism is assembled. According to the prestressing force applying mechanism, the prestressing force applied to the tundish base plate offsets the gravity of molten steel, down deflection of the tundish is controlled, the service life of the tundish is prolonged, and continuous casting heat is increased.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical continuous casting, and more specifically, relates to an assembly method of a tundish prestressing mechanism and a preparation process of an anti-slip tundish. Background technique [0002] The tundish is a refractory container used in the iron and steel metallurgical production process. The tundish receives molten steel poured from the ladle, and then is distributed to each crystallizer by the tundish nozzle. The tundish is the key link in the gating system of the continuous casting machine. It is located between the ladle and the crystallizer, and is used to receive molten steel from the ladle and inject molten steel into the mold. The purpose of using the tundish is to reduce the static pressure of molten steel, Make the steel flow stable and reduce the impact and agitation of the steel flow on the molten steel in the crystallizer. The tundish can divide the molten steel th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/00
CPCB22D41/00
Inventor 邓爱军范鼎东
Owner 河南济源钢铁(集团)有限公司
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