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A medium carbon steel chamfered copper plate continuous casting mold mold powder and preparation method thereof

The invention relates to a continuous casting mold and mold flux technology, which is applied to the mold mold mold flux for continuous casting of medium carbon steel chamfered copper plates and its preparation field, and can solve the quality problems that do not solve the problem of corner cracks of casting billets and transverse cracks at the corners of narrow bulges and belly parts. problems, not suitable for chamfering continuous casting molds, etc., to achieve the effect of improving heat transfer stability and uniformity, good heat transfer capacity, and avoiding corner cracks

Active Publication Date: 2017-11-24
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents still do not solve the quality problems of corner cracks, narrow side bulging, and corner transverse cracks of the slab, and are not suitable for chamfering continuous casting mold operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A medium carbon steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 40%, SiO 2 : 23%, MgO: 5.5%, Li 2 O: 1.5%, Al 2 o 3 : 5%, Na 2 O: 10%, F: 7% and C: 8%.

[0032] The preparation method of the above-mentioned medium carbon steel chamfering copper plate continuous casting mold powder comprises the following steps:

[0033] (1) Ingredients: Prepare various raw materials according to the above chemical composition and their weight percentages, such as: wollastonite, limestone, quartz sand, albite, alumina stone, magnesia, lithium carbonate, soda ash, fluorite, carbon Quality material carbon black, binder carboxymethyl cellulose sodium salt CMC;

[0034] (2) Melting: use an electric furnace to melt various raw materials except carbonaceous materials and adhesives;

[0035] (3) Water quenching: the molten slag directly enters the water pool to cool and solidify into a glass body;

[0036] (4) Drying:...

Embodiment 2

[0042] A medium carbon steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 41%, SiO 2 : 23%, MgO: 6.2%, Li 2 O: 2.2%, Al 2 o 3 : 4.6%, Na 2 O: 9.5%, F: 7% and C: 6.5%.

[0043] The preparation method of the above-mentioned medium carbon steel chamfering copper plate continuous casting mold powder comprises the following steps:

[0044] (1) Ingredients: Prepare various raw materials according to the above chemical composition and their weight percentages, such as: wollastonite, limestone, quartz sand, albite, alumina stone, magnesia, lithium carbonate, soda ash, fluorite, carbon carbon black and graphite, binder carboxymethylcellulose sodium salt CMC;

[0045] (2) Melting: use an electric furnace to melt various raw materials except carbonaceous materials and adhesives;

[0046] (3) Water quenching: the molten slag directly enters the water pool to cool and solidify into a glass body;

[0047] (4) Drying:...

Embodiment 3

[0053] A medium carbon steel chamfering copper plate continuous casting mold powder, its chemical composition and weight percentage are: CaO: 41.5%, SiO 2 : 24%, MgO: 7%, Li 2 O: 2.5%, Al 2 o 3 : 3.8%, Na 2 O: 8%, F: 6.2% and C: 7%.

[0054] The preparation method of the above-mentioned medium carbon steel chamfering copper plate continuous casting mold powder comprises the following steps:

[0055] (1) Ingredients: Prepare various raw materials according to the above chemical composition and their weight percentages, such as: wollastonite, limestone, quartz sand, albite, alumina stone, magnesia, lithium carbonate, soda ash, fluorite, carbon carbon black and graphite, binder dextrin;

[0056] (2) Melting: use an electric furnace to melt various raw materials except carbonaceous materials and adhesives;

[0057] (3) Water quenching: the molten slag directly enters the water pool to cool and solidify into a glass body;

[0058] (4) Drying: Dry the vitreous body until the ...

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Abstract

The invention relates to medium carbon steel chamfering copper plate continuous casting mold covering slag and a preparation method thereof. The casting slag comprises, by weight, 40-45% of CaO, 19-25% of SiO2, 3-7% of MgO, 1-2.5% of Li2O, 2-5% of Al2O3, 7-10% of Na2O, 5-7% of F and 4-8% of C. The covering slag is obtained through the steps of proportioning, melting, water quenching, drying, smashing, preparation and spray granulation, the medium carbon steel chamfering copper plate continuous casting mold covering slag is rational and adequate in proportioning of chemical components, good in heat-transfer capability, high in heat transfer uniformity and good in lubricating effect, and quality defects such as corner crack, narrow-edge bulging and transverse corner cracks of casting blanks of medium carbon steel are avoided effectively.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a medium-carbon steel chamfering copper plate continuous casting mold mold slag and a preparation method thereof. Background technique [0002] At present, most domestic steel mills use right-angle continuous casting molds for continuous casting operations. The existing right-angle continuous casting molds are generally composed of four copper plates, and the corners are called right angles. To make the shrinkage of the corners greater than the amount of taper compensation of the copper plate of the crystallizer, resulting in the formation of a large air gap in the off-angle part, especially the wide-face off-corner area, and the air gap thermal resistance accounts for more than 80% of the entire thermal resistance, which further leads to The temperature at the off-corner area of ​​the slab is too high, forming a hot spot area, and a large transverse stress tensio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 王正英彭会志张福梁冠东王旭阳庞炎
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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