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Quartz sand-containing fireproof brick and preparation method thereof

A technology of quartz sand and refractory bricks, which is applied in the field of refractory materials, can solve the problems of increasing the loss of heat energy, short service life of refractory bricks, and reducing the heat insulation effect of refractory materials

Inactive Publication Date: 2018-05-11
HENAN ZHILIAN HUANYU INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, this refractory brick has a short service life and cannot be reused.
In addition, due to the large size of pores in traditional refractory aggregates, the pore diameters are mostly at the millimeter level, so when the material is used in a high temperature environment, due to the intensification of radiation heat transfer and convective heat transfer through the gas in the pores, the refractory material will The thermal conductivity of the refractory material increases, which in turn reduces the heat insulation effect of the refractory material, increases the loss of heat energy, and leads to an increase in energy costs.

Method used

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  • Quartz sand-containing fireproof brick and preparation method thereof
  • Quartz sand-containing fireproof brick and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] This embodiment provides a refractory brick containing quartz sand, which includes the following raw materials in mass percentages: 22.5% of large forsterite particles, 14% of small periclase particles, 4% of sulfamic acid fine powder, and 15% of quartz sand 10% coal gangue fine powder, 16% mullite fine powder, 2% calcined magnesia powder, 1% expanded graphite, 4% composite anti-seepage agent, 1.5% composite binder, and 10% pulp water.

[0023] Among them, the composite binder is composed of phosphate aqueous solution and silica sol with a mass ratio of 2:1; the composite anti-seepage agent is composed of nano strontium carbonate, nano strontium sulfate and nano Composition of barium sulfate. The particle size of the large forsterite particles is 3 mm to 4 mm; the particle size of the small periclase particles is 1 mm to 2 mm; the particle size of the sulfamic acid fine powder is less than 0.074 mm, and the fine coal gangue The particle size of the powder is less than ...

Embodiment 2

[0030] This embodiment provides a refractory brick containing quartz sand, which includes the following raw materials in mass percentages: 27% of large forsterite particles, 13% of small periclase particles, 3% of sulfamic acid fine powder, and 14% of quartz sand , Coal gangue fine powder 9%, mullite powder 15%, magnesium chloride hexahydrate 1%, expanded graphite 0.5%, composite anti-seepage agent 4%, composite binder 1%, pulp water 12.5%.

[0031] The preparation method of the refractory brick containing quartz sand described in this embodiment is roughly the same as the preparation method in Example 1, except that:

[0032] In the step (2), the brick making machine is used to press the mixed mud into adobe under a pressure of 70 MPa, and the adobe is naturally dried for 12 hours, then placed in a drying kiln, and dried at a temperature of 100°C 20 hours; then the dried adobe was calcined at a temperature of 1300° C. for 15 hours, so as to prepare the refractory brick contai...

Embodiment 3

[0034] This embodiment provides a refractory brick containing quartz sand, which includes the following raw materials in mass percentages: 19% of large forsterite particles, 14% of small periclase particles, 11% of sulfamic acid fine powder, and 15% of quartz sand , Coal gangue fine powder 10%, mullite fine powder 18%, magnesia clay 3%, expanded graphite 0.5%, composite anti-seepage agent 4%, composite binder 1%, pulp water 4.5%.

[0035] The preparation method of the refractory brick containing quartz sand described in this embodiment is the same as that in Example 1.

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Abstract

The invention provides a quartz sand-containing fireproof brick, which comprises the following raw materials by mass: 19-27% of large-particle forsterite, 13-25% of small-particle periclase, 3-11% ofsulfamic acid fine powder, 14-29% of quartz sand, 9-28% of coal gangue fine powder, 15-27% of mullite micro-powder, 1-3% of a magnesia combustion aid, 0.5-2% of expanded graphite, 4-9% of a compositeanti-seepage agent, 1-4% of a composite binder, and the balance of paper pulp water. According to the present invention, the quartz sand-containing fireproof brick has advantages of reasonable component ratio, high corrosion resistance, good dimensional stability and high refractoriness under load. The invention further provides a preparation method of the quartz sand-containing fireproof brick, wherein the method has the simple steps, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory brick containing quartz sand and a preparation method thereof. Background technique [0002] Refractory materials are widely used in metallurgy, petrochemical, glass and other high-temperature industries due to their good corrosion resistance to high-temperature media and their thermal insulation properties. As my country's emphasis on energy saving and consumption reduction continues to increase, more research and development has been done on lightweight refractory materials with good thermal insulation effects. Unshaped refractory materials have received special attention due to their advantages of convenient construction, low production cost, and good overall structure of the lining, among which refractory castables are the most widely used. [0003] Most of the existing refractory bricks are sticky heat-insulating refractory bricks, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/08
CPCC04B35/66C04B38/08C04B2235/3206C04B2235/3213C04B2235/3215C04B2235/3418C04B2235/3445C04B2235/3463C04B2235/425C04B2235/447C04B2235/5454C04B2235/656C04B2235/77C04B2235/96C04B38/0067
Inventor 张微微计富宝吉飞虎
Owner HENAN ZHILIAN HUANYU INTPROP OPERATION CO LTD
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