Ladle molten-bath brick

A ladle and molten pool technology, applied in the field of molten pool bricks, can solve problems such as low service life, inability to meet the normal production needs of iron and steel enterprises, and affect the service life and cost of ladle lining refractory materials, so as to achieve long service life and strong erosion resistance , The effect of convenient construction

Inactive Publication Date: 2017-01-18
CHANGXING FUZILING SPECIAL FIRE RESISTANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the life of the ladle molten pool bricks produced by the existing technology is low, which is one of several key common technical problems affecting the life and cost of the ladle lining refractory material
Since large domestic iron and steel enterprises have participated in the smelting of special and special steels this year, the requirements for bricks on the wall of the ladle melting pool are getting higher and higher, and the ordinary casting type or combined melting pool bricks after the mechanism cannot meet the normal production needs of iron and steel enterprises.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0024] The following raw materials are used: 68% of electro-fused large crystal magnesia with a content of more than 95% and a particle size of 0-5mm, 15% of lithium trioxide, 12% of high-purity carbon, 2% of metal antioxidants, 1% of special additives, and 3% of high-strength phenolic resin, 2% of platy corundum fine powder with particle size <0.088mm 0.044mm, 1% of platy corundum fine powder with particle size <0.044mm; 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 of 0-10°C at a heating rate of 3°C / h to 290~ 350°C; c. Keep warm at 290-350°C for 5 hours; d. Then heat up from 290-350°C at a heating rate of 10°C / h to 575-600°C; e. ℃ / h hea...

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PUM

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Abstract

The invention relates to a ladle molten-bath brick, which contains the following raw materials: 68% of fused macrocrystalline magnesia with content being 95% and above and particle size being 0-5 mm, 15% of lithium trioxide, 12% of high-purity carbon, 2% of a metal antioxidant, 1% of a special additive and 3% of high-strength phenolic resin. The ladle molten-bath brick is prepared by the following steps: adding the above raw materials in order, uniformly mixing by a high-speed blender for a long time, and pressing by high-tonnage friction pressure so as to prepare the ladle molten-bath brick. The ladle molten-bath brick product prepared by the scheme has the following advantages: straight slits of operational layer are prevented; the product has good corrosion resistance, strong anti-erosion property and high thermal shock resistance, is convenient for construction, is energy-saving and environment friendly, and has long service life; consumption of a refractory material is greatly reduced; discharge of refractory industrial solid wastes is reduced; and the product also has remarkable effects in saving mineral resources and saving energy.

Description

technical field [0001] The invention relates to the technical field of molten pool bricks, in particular to a ladle molten pool brick. Background technique [0002] The ladle is the basic container for steelmaking to transport molten steel and LF, RH and other out-of-furnace refining. The molten pool brick is a kind of brick placed on the wall of the ladle. At present, the life of the ladle molten pool bricks produced by the prior art is low, which is one of several key common technical problems affecting the life and cost of the ladle lining refractory material. Since large domestic iron and steel enterprises have been involved in the smelting of special and special steels this year, the requirements for bricks on the wall of the ladle melting pool are getting higher and higher. Ordinary cast-type or machine-made molten pool bricks cannot meet the normal production needs of iron and steel enterprises at all. . Contents of the invention [0003] The technical problem to ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043
CPCC04B35/043C04B2235/3203C04B2235/3217C04B2235/3463C04B2235/422C04B2235/5216
Inventor 杨志刚
Owner CHANGXING FUZILING SPECIAL FIRE RESISTANT
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