Refractory low-carbon magnesium carbon brick

A carbon-magnesia-carbon brick and refractory technology, which is applied in the field of refractory materials, can solve the problems of poor slag corrosion resistance and thermal shock resistance, etc., and achieve the improvement of slag corrosion resistance, internal density, and internal organizational structure. Effect

Inactive Publication Date: 2018-01-19
马小良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a refractory low-carbon magnesia-carbon brick for the disadvantages of traditional low-carbon magnesia-carbon bricks, such as poor slag corrosion resistance and thermal shock resistance.

Method used

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Examples

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example 1

[0033]In parts by weight, 30 parts of particle diameters are added successively in the mixer to be 5mm fused magnesia, 30 parts of particle diameters are 2mm fused magnesia, 40 parts of particle diameter are 0.8mm fused magnesia, at a speed of Under the condition of 600r / min, stir and mix for 4 hours to obtain graded fused magnesia; mix rice husk and water according to the mass ratio of 1:15, stand and soak at room temperature for 12 hours, and then transfer the soaked rice husk to put into the refrigerator, freeze at -18°C for 8 hours to obtain frozen rice husks, pour the obtained frozen rice husks into a stone mill, and grind for 40 minutes to obtain abrasives, then transfer the obtained abrasives to an oven, and Dry at a temperature of 110°C to a constant weight to obtain dry abrasives, then move the dry abrasives into a carbonization furnace, and feed argon gas into the furnace at a rate of 80mL / min. Rate programming to 450°C, after heat preservation and carbonization for ...

example 2

[0035] In parts by weight, 30 parts of particle diameters are added successively in the mixer to be 5mm fused magnesia, 30 parts of particle diameters are 2mm fused magnesia, 40 parts of particle diameter are 0.8mm fused magnesia, at a speed of Under the condition of 600r / min, stir and mix for 4 hours to obtain graded fused magnesia; mix rice husk and water according to the mass ratio of 1:15, stand and soak at room temperature for 12 hours, and then transfer the soaked rice husk to put into the refrigerator, freeze at -18°C for 8 hours to obtain frozen rice husks, pour the obtained frozen rice husks into a stone mill, and grind for 40 minutes to obtain abrasives, then transfer the obtained abrasives to an oven, and Dry at a temperature of 110°C to a constant weight to obtain dry abrasives, then move the dry abrasives into a carbonization furnace, and feed argon gas into the furnace at a rate of 80mL / min. Rate programming to 450°C, after heat preservation and carbonization for...

example 3

[0037] In parts by weight, 30 parts of particle diameters are added successively in the mixer to be 5mm fused magnesia, 30 parts of particle diameters are 2mm fused magnesia, 40 parts of particle diameter are 0.8mm fused magnesia, at a speed of Under the condition of 600r / min, stir and mix for 4 hours to obtain graded fused magnesia; mix rice husk and water according to the mass ratio of 1:15, stand and soak at room temperature for 12 hours, and then transfer the soaked rice husk to put into the refrigerator, freeze at -18°C for 8 hours to obtain frozen rice husks, pour the obtained frozen rice husks into a stone mill, and grind for 40 minutes to obtain abrasives, then transfer the obtained abrasives to an oven, and Dry at a temperature of 110°C to a constant weight to obtain dry abrasives, then move the dry abrasives into a carbonization furnace, and feed argon gas into the furnace at a rate of 80mL / min. Rate programming to 450°C, after heat preservation and carbonization for...

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Abstract

The invention discloses a refractory low-carbon magnesium carbon brick, which belongs to the technical field of refractory materials. The refractory low-carbon magnesium carbon brick is prepared fromgradation fused magnesite, graphitizing carbon, kyanite, metal powder, thermosetting resin, a curing agent, a co-solvent, isocyanate and calcium hydrogen carbonate, wherein the graphitizing carbon adopts rice husk as a raw material and is obtained by soaking, freezing, grinding, drying, carbonizing and graphitizing the rice husk, the metal powder is prepared from aluminum powder and iron powder, the co-solvent is prepared from boron oxide, borax and sodium carbonate, and various components are uniformly mixed, poured into a mold, pressed, molded, roasted, cured, and discharged, thus obtainingthe refractory blanket magnesium carbon brick. The refractory low-carbon magnesium carbon brick prepared by the technical scheme of the invention has the characteristics of excellent slag erosion resistance and thermal shock resistance.

Description

technical field [0001] The invention discloses a refractory low-carbon magnesia-carbon brick, which belongs to the technical field of refractory materials. Background technique [0002] Due to the non-wetting of graphite and slag and the good thermal conductivity of graphite, magnesia carbon bricks have excellent slag erosion resistance and thermal shock stability, and are widely used in steelmaking production. However, the carbon content of traditional magnesia-carbon bricks is generally between 10% and 20%. In the long-term practical application process, the following problems are found: ①Due to the high thermal conductivity increasing heat loss, the tapping temperature is increased, which brings energy Consumption increases, and at the same time increases a series of problems such as the erosion of refractory materials; ② As a lining material for special refining furnaces, such as smelting high-quality clean steel and ultra-low carbon steel in VOD, it will cause carbon in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/622
Inventor 马小良许蘅陈龙
Owner 马小良
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