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Sliding water outlet with a micro -expansion of carbon fire -resistant mud and production methods

A sliding nozzle and refractory mud technology, which is applied in the direction of manufacturing tools, casting melt containers, casting equipment, etc., can solve the problems of increased labor intensity of sliding nozzle products, large shrinkage of fire mud, and difficulty in cleaning, etc., so as to prevent the penetration of molten steel and reduce Effect of shrinkage rate and good oxidation resistance

Active Publication Date: 2022-08-05
HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the fire clay used for bonding refractory materials is mostly aluminum-chrome fire clay, and clay or phosphate is used as a binder, which makes the fire clay shrink greatly at high temperature, and the large shrinkage leads to breakouts At the same time, the aluminum chrome fire clay has a strong sintering property with the sliding nozzle product after use, and it is difficult to clean up, which leads to increased labor intensity and longer time for hot repair and replacement of the sliding nozzle product

Method used

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  • Sliding water outlet with a micro -expansion of carbon fire -resistant mud and production methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Micro-expanded carbon-containing refractory mud for sliding nozzles, by weight percentage, the raw material composition is: 68% fused mullite, 5% kyanite, 8% fused white corundum powder, 5% calcined alumina Micro powder, 5% Guangxi white mud, 5% flake graphite, 2% solid aluminum dihydrogen phosphate, 2% boron nitride, plus 2% gum arabic powder and 1% carboxymethyl cellulose.

[0028] Among them, the fused mullite includes: 0.2mm<grain size 1≤0.5mm, 0.074mm<grain size 2≤0.2mm, grain size 3≤0.074mm, and the weight ratio of different grain sizes is: grain size 1: grain size 2: grain size 3=8 : 10:50.

[0029] The particle size of fused white corundum powder is less than or equal to 0.045mm; the particle size of kyanite is less than or equal to 0.2mm; the particle size of Guangxi white mud is less than or equal to 0.2μm; the particle size of flake graphite is less than or equal to 0.074mm, and the carbon content is greater than or equal to 98%; D50 is 1 μm to 2 μm; the pa...

Embodiment 2

[0038] Micro-expanded carbon-containing refractory mud for sliding nozzles, by weight, the raw material composition is: 65% fused mullite, 8% kyanite, 8% fused white corundum powder, 5% calcined alumina Micro powder, 5% Guangxi white mud, 5% flake graphite, 2% solid aluminum dihydrogen phosphate, 2% boron nitride, plus 2% gum arabic powder and 1% carboxymethyl fiber in total of the above raw materials white.

[0039] Among them, the fused mullite includes: 0.2mm

[0040]The particle size of fused white corundum powder is less than or equal to 0.045mm; the particle size of kyanite is less than or equal to 0.2mm; the particle size of Guangxi white mud is less than or equal to 0.2μm; the particle size of flake graphite is less than or equal to 0.074mm, and the carbon content is greater than or equal to 98%; D50...

Embodiment 3

[0043] Micro-expanded carbon-containing refractory mud for sliding nozzles, by weight percentage, the raw material composition is: 63% fused mullite, 10% kyanite, 8% fused white corundum powder, 5% calcined alumina Micro powder, 5% Guangxi white mud, 5% flake graphite, 2% solid aluminum dihydrogen phosphate, 2% boron nitride, plus 2% gum arabic powder and 1% carboxymethyl fiber in total of the above raw materials white.

[0044] Among them, the fused mullite includes: 0.2mm

[0045] The particle size of fused white corundum powder is less than or equal to 0.045mm; the particle size of kyanite is less than or equal to 0.2mm; the particle size of Guangxi white mud is less than or equal to 0.2μm; the particle size of flake graphite is less than or equal to 0.074mm, and the carbon content is greater than or equal...

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Abstract

The invention provides a micro-expanded carbon-containing refractory mud for a sliding nozzle. The raw material is composed of: 55-68% fused mullite, 5-10% kyanite, 8-12% electric Fused white corundum powder, 5-10% calcined alumina fine powder, 5-10% Guangxi white mud, 3-5% flake graphite, 2-4% solid aluminum dihydrogen phosphate, 1-2% nitride Boron, the total amount of the above-mentioned raw materials is 100%, and the total amount of the above-mentioned raw materials is 0-2% of gum arabic powder and 0.5-1% of carboxymethyl cellulose. The obtained refractory mud has good oxidation resistance; good adhesion and plasticity in cold state; easy to clean and flake off when replacing, which can effectively reduce the damage to the seat bricks during cleaning; strong resistance to molten steel penetration, effectively hindering the The penetration of molten steel caused by shrinkage during high temperature use effectively reduces the shrinkage rate of fire clay during high temperature use.

Description

technical field [0001] The invention relates to a micro-expanded carbon-containing refractory mud for sliding nozzles and a production method, and belongs to the field of sliding nozzle materials. Background technique [0002] The sliding nozzle is the control device for molten steel in the casting process of the continuous casting machine, which can accurately adjust the water flow from the ladle to the continuous casting tundish, so that the inflow and outflow of molten steel can be balanced, so that the continuous casting operation is easier to control. Indispensable part. The sliding nozzle is generally composed of a driving device, a mechanical part and a refractory part (ie, the upper and lower slide plates, the water outlet). [0003] Refractory clay, also known as refractory clay, is used as a joint material for refractory masonry, and is mainly composed of refractory powder, binder and admixture. It is mainly divided into finished products and semi-finished produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/185B22D41/22B22D41/02
CPCC04B35/66C04B35/185B22D41/02B22D41/22C04B2235/3463C04B2235/3217C04B2235/349C04B2235/425C04B2235/447C04B2235/386C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/77C04B2235/96C04B2235/9615
Inventor 赵臣瑞牛智旺韩彦锋梁保青徐跃庆李宏宇李雪翠来丽苹王海霞
Owner HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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