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High-performance brick cup

A high-performance, seat brick technology, applied in the field of seat bricks, can solve the problems that affect the service life and cost of ladle lining refractory materials, cannot meet the normal production needs of iron and steel enterprises, and have high requirements for ladle outlet nozzle seat bricks, etc., to achieve long service life, anti-corrosion Strong scouring ability and convenient construction

Inactive Publication Date: 2016-03-23
ZHEJIANG HUZHOU FUZILING REFRACTORY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the life of the ladle ventilating seat bricks produced by the existing technology is low, which is one of several key common technical problems that affect the life and cost of the refractory material of the ladle lining.
Since large-scale domestic iron and steel enterprises have participated in the smelting of special and special steels this year, the requirements for the ladle outlet nozzle block are getting higher and higher, and the ordinary pouring type or the combined nozzle block after the mechanism cannot meet the normal production needs of iron and steel enterprises.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The following raw materials are used: 51% of fused large crystal magnesia with a content of more than 98% and a particle size of 0.3-1.5mm, 37% of fused chromium corundum sand with a particle size of 0.7-1.3mm, 6% of high-purity flake graphite, metal anti-corrosion Oxidant 2%, special additive 1%, high-strength phenolic resin 3%. Add the above-mentioned raw materials in sequence, and after a long time of uniform mixing by a high-speed mixer, the high-tonnage friction pressure is pressed to form a high-performance seat block. Then bake and cool the green body through the following process: a. Lower the normal temperature to -10~-5°C and keep it for 1-2.5h; b. Raise the temperature from a low temperature of 0-10°C at a rate of 3°C / h , heat up to 290-350°C; c, heat preservation at 290-350°C, holding time 5-8h; d, heat up from 290-350°C at a heating rate of 10°C / h, and heat up to 575-600°C; e, again Raise the temperature from 575-600°C at a heating rate of 5°C / h, and heat ...

Embodiment 2

[0030] The following raw materials are used: 50% of fused large crystal magnesia with a content of more than 98% and a particle size of 0.3-1.5mm, 35% of fused chromium corundum sand with a particle size of 0.7-1.3mm, 6% of high-purity flake graphite, metal anti-corrosion 2% oxidizing agent, 1% special additive, 3% high-strength phenolic resin, 2% platy corundum fine powder with a particle size <0.088mm of 0.044mm, 1% platy corundum fine powder with a particle size <0.044mm; the above-mentioned platy corundum fine powder The ratio of the content of the plate-like corundum micropowder is 2:1. Add the above-mentioned raw materials in sequence, and after a long time of uniform mixing by a high-speed mixer, the high-tonnage friction pressure is pressed to form a high-performance seat block. Then bake and cool the green body through the following process: a. Lower the normal temperature to -8°C and keep it for 2.5 hours; b. Then raise the temperature from a low temperature state of...

Embodiment 3

[0033]The following raw materials are used: 51% of fused large crystal magnesia with a content of more than 98% and a particle size of 0.3-1.5mm, 37% of fused chromium corundum sand with a particle size of 0.7-1.3mm, 6% of high-purity flake graphite, metal anti-corrosion 2% oxidizing agent, 1% special additive, 3% high-strength phenolic resin, 8.0% of tabular corundum fine powder with particle size <0.088mm of 0.044mm, 4.0% of tabular corundum fine powder of particle size <0.044mm; the above-mentioned tabular corundum fine powder The ratio of the content of the plate-like corundum micropowder is 2:1. The above raw materials are added in sequence, and after a long time of uniform mixing by a high-speed mixer, the high-tonnage friction pressure is pressed into a high-performance seat block. Then bake and cool the green body through the following process: a. Lower the normal temperature to -5°C and keep it for 2 hours; b. Then raise the temperature from the low temperature state ...

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Abstract

The invention relates to a high-performance brick cup. The high-performance brick cup comprises the following raw materials in percentage by weight: 50%-52% of fused magnesia with large crystal, 35%-38% of electric-fused chromium corundum sand, 5%-7% of high-purity flake graphite, 2% of a metal antioxidant, 1% of a special additive and 3% of high-strength phenolic resin, wherein the content of the fused magnesia with large crystal is 98% or above, and the particle size of the electric-fused macrocrystalline magnesium sand is 0-5mm; the particle size of the electric-fused macrocrystalline magnesium sand is 0-5mm; the raw materials are sequentially added, are mixed for a long time by virtue of a high-speed mixing machine and are pressed into the high-performance brick cup by virtue of high-tonnage friction pressure. The high-performance brick cup prepared by virtue of the scheme has the advantages of good erosion resistance, strong erosion resistance, high thermal shock resistance, convenience in construction, energy conservation, environmental friendliness, long service life and the like; the consumption of refractory materials is greatly reduced, and meanwhile, the discharge of refractory industrial solid waste is reduced; the high-performance brick cup has remarkable effects in the conservation of mineral resources and energy sources.

Description

technical field [0001] The invention relates to the technical field of seat bricks, in particular to a high-performance seat brick. Background technique [0002] The ladle is the basic container for steelmaking, shipping molten steel and refining outside the furnace such as LF and RH. The venting brick is a venting element for blowing argon into the molten steel. Air-permeable bricks, placed at the bottom of the ladle and lined with refractory elements. At present, the life of the air-permeable seat brick of the ladle produced by the prior art is low, which is one of several key common technical problems affecting the life and cost of the refractory material for the working lining of the ladle. Since large-scale domestic iron and steel enterprises have been involved in the smelting of special and special steels this year, the requirements for the ladle outlet nozzle block are getting higher and higher. Ordinary pouring type or post-machine combined nozzle block cannot meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王柏成
Owner ZHEJIANG HUZHOU FUZILING REFRACTORY GRP CO LTD
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