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Continuous casting crystallizer covering slag for ASP medium-carbon steel and a preparation method thereof

A continuous casting mold and mold flux technology is applied in the field of continuous casting mold mold flux for ASP medium carbon steel and its preparation. The effect of improving, reducing the cost and improving the quality of the project

Active Publication Date: 2016-06-08
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the production of the high-strength continuous casting mold powder in the above-mentioned patents all uses wollastonite, bauxite, etc. as base materials, fluorite, soda ash, etc. as fluxes, graphite, carbon black, etc. Carboxymethyl cellulose sodium salt (CMC) or dextrin is used as the binder, but the dispersion performance of CMC is weakened when it is above 300°C, while the temperature of the normal granulation tower is about 700°C. Since the particle strength of the product is 260~290Pa, The poor particle strength of the product leads to a ball forming rate of about 85%. The product has a low ball forming rate and a lot of dust. Part of the dust is recovered through dust removal, and part of the dust is scattered in the air, causing environmental pollution.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] A mold flux for continuous casting molds for carbon steel in ASP, including raw materials and their weight percentages as follows: glass powder: 6%, premelt: 12%, wollastonite: 11.5%, fluorite: 10.5%, White alkali: 7%, carbon black: 5.5%, graphite: 6.5%, sodium fluoride: 5%, manganese carbonate: 8%, magnesia: 9%, bauxite: 12%, cryolite: 3%, sticky Mixture: 3%, water reducer: 1%. Wherein, the binder is a mixture of oxidized starch binder and drier, the drier is organic drier polyvinyl alcohol, and the weight ratio of oxidized starch binder to polyvinyl alcohol is 100:1, water-reducing The agent is polycarboxylate water reducer.

[0024] The preparation method comprises the following steps: 1) Pulverize glass powder, premelted material, wollastonite, fluorite, white alkali, sodium fluoride, manganese carbonate, magnesia, bauxite and cryolite into 200-300 mesh powder 2) Add binder, water reducer, carbon black and graphite to the mixed raw materials in step 1) and melt in...

Embodiment 2

[0027]A continuous casting mold powder for carbon steel in ASP, including raw materials and their weight percentages are as follows: glass powder: 1%, premelt: 25%, wollastonite: 25%, fluorite: 11%, White alkali: 8%, carbon black: 4%, graphite: 4.5%, sodium fluoride: 1%, manganese carbonate: 1%, magnesia: 4%, bauxite: 8%, cryolite: 0.5%, sticky Mixture: 1%, water reducer: 0.5%, Li 2 O0.5% and B 2 o 3 5%. The binder is oxidized starch. The mixture of binder and drier, the drier is organic drier polyvinyl alcohol, the weight ratio of oxidized starch binder to polyvinyl alcohol is 100:2, and the water agent is polycarboxylate water reducer .

[0028] The preparation method comprises the following steps: 1) Pulverize glass powder, premelted material, wollastonite, fluorite, white alkali, sodium fluoride, manganese carbonate, magnesia, bauxite and cryolite into 200-300 mesh powder 2) Add binder, water reducer, carbon black and graphite to the mixed raw materials in step 1) an...

Embodiment 3

[0031] A continuous casting mold powder for carbon steel in ASP, including raw materials and their weight percentages are as follows: premelt: 29%, wollastonite: 20%, fluorite: 10.5%, white alkali: 6%, Carbon black: 5%, graphite: 5%, sodium fluoride: 5%, manganese carbonate: 5%, magnesia: 4%, bauxite: 8%, cryolite: 0.5%, binder: 1%, Water reducer: 1%. Wherein, the binder is a mixture of oxidized starch binder and drier, and the drier is organic drier polyvinyl alcohol, and the weight ratio of oxidized starch binder to polyvinyl alcohol is 100:3, water-reducing The agent is polycarboxylate water reducer.

[0032] The preparation method comprises the following steps: 1) Pulverize glass powder, premelted material, wollastonite, fluorite, white alkali, sodium fluoride, manganese carbonate, magnesia, bauxite and cryolite into 200-300 mesh powder 2) Add binder, water reducer, carbon black and graphite to the mixed raw materials in step 1) and melt in the slag furnace to obtain liq...

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Abstract

The invention discloses continuous casting crystallizer covering slag for ASP medium-carbon steel and a preparation method thereof. The covering slag comprises the following raw materials in percentage by weight: 0-6% of glass powder, 10-30% of premelting materials, 10-30% of wollastonite, 10.5-15.5% of fluorite, 4-8% of white alkali, 4-8% of carbon black, 4.5-8.5% of graphite, 0-5% of sodium fluoride, 5-8% of manganese carbonate, 4-9% of magnesia, 8-12% of bauxite, 0.5-3% of cryolite, 1-3% of adhesive, and 0.3-1% of water reducing agent. The covering slag optimizes the ratio, guarantees a certain melting speed while guaranteeing the insulation effect, has a certain liquid slag layer thickness, is uniformly consumed, guarantees smooth actuation of a continuous casting process, and produces an excellent casting blank.

Description

technical field [0001] The invention relates to a mold flux, in particular to a mold flux for a continuous casting mold for carbon steel in ASP and a preparation method thereof. Background technique [0002] With the advancement of science and technology, continuous casting technology is gradually becoming mature. 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, domestic and foreign iron and steel enterprises generally adopt continuous casting and rolling technology. Continuous casting and rolling has been widely favored and has broad development prospects due to its simplified process, short production cycle, high yield, and...

Claims

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Application Information

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IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 彭会志张福王正英徐金岩王岩梁冠东
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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