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Clay-free amorphous refractory material

A refractory, clay-free technology, applied in the field of refractories, can solve the problems of poor line change performance and low strength of refractory materials, and achieve the effects of good plasticity, high normal temperature strength, and excellent line change performance.

Inactive Publication Date: 2016-03-30
QINGDAO WEIYE FORGING & STAMPING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since raw clay is the source of plasticity, but its addition makes the refractory material have low strength and poor linear change performance at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0016] Embodiment 1, a kind of non-clay amorphous refractory material used in circulating fluidized bed boiler hearth dace furnace wall, its component ratio is: (weight percentage)

[0017] Brown corundum aggregate 65 parts

[0018] Fused silica powder 25 parts

[0019] Silica powder <5μm3 parts

[0020] 7 parts of amorphous alumina 180-200 mesh

[0021] Plus:

[0022] Aluminum phosphate aqueous solution 8 parts

[0023] 1 part of citric acid

[0024] The performance parameters of this clay-free unshaped refractory material are as follows:

[0025] Bulk density; 2.8-2.9g / cm 3

[0026] Compressive strength (1000℃×3h): ≥100Mpa

[0027] Wear resistance; ≤7cc

[0028] Line change after burning: (1000℃×3h); <-0.3%

Embodiment 2

[0029] Embodiment 2, a kind of clay-free amorphous refractory material suitable for the roof of pusher type heating furnace, its component ratio is: (weight percentage)

[0030] 65 parts of bauxite aggregate

[0031] Fused silica powder 21 parts

[0032] Silica micropowder<5μm4 parts

[0033] 10 parts of amorphous alumina 180-200 mesh

[0034] Plus:

[0035] 8.5 parts of aluminum sulfate aqueous solution

[0036] 1.5 parts of oxalic acid

[0037] The performance parameters of the non-viscosity ± refractory plastic are tested as follows:

[0038] Bulk density: 2.5-2.6g / cm 3

[0039] Compressive strength (1250℃×3h): ≥60Mpa

[0040] Line change after burning: (1250℃×3h): ≤-0.25%

Embodiment 3

[0041] Example 3, a clay-free amorphous refractory material suitable for thermal equipment with high temperature and large temperature fluctuations, its component ratio is: (weight percent)

[0042] Mullite aggregate 68 parts

[0043] Mullite fused silica powder 20 parts

[0044] Silica powder <5μm3 parts

[0045] 9 parts of amorphous alumina 180-200 mesh

[0046] additional;

[0047] Aluminum phosphate aqueous solution 7 parts

[0048] Lignosulfonate 1.8 parts

[0049] The performance parameters of this clay-free unshaped refractory material are as follows:

[0050] Bulk density: 2.5-2.6g / cm 3

[0051] Compressive strength (1500℃×3h): ≥90Mpa

[0052] Line change after burning (1450℃×3h): 0-+0.15%

[0053] Thermal shock resistance (1100°C, water cooling): ≥35 times.

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Abstract

A clay-free amorphous refractory material belongs to the field of refractory materials, and comprises a fireproof aggregate, a fused quartz powder and a chemical binder, and also comprises amorphous Al2O3 fine powder, and amorphous Al2O3 fine powder is obtained by performing suspension heating on industrial aluminium hydroxide at 700 DEG C-800 DEG C and then performing air quenching. The clay-free amorphous refractory material is a plastic refractory material which is obtained by employing high-activity amorphous Al2O3 fine powder for replacing green clay, is good in plasticity, and possesses relatively high normal-temperature strength and excellent linear variation performance. The fireproof aggregate and the fused quartz powder also can be replaced for adapting to different thermal-equipment demands, and the application scope is wide.

Description

technical field [0001] The invention relates to a refractory material, especially a clay-free amorphous refractory material. Background technique [0002] Generally, refractory plastic is made of refractory aggregate, fused silica powder, raw clay, chemical compound binder, and admixture, mixed and kneaded, extruded into a brick shape, and still has good plasticity after being packaged and stored for a certain period of time, and can be pounded. The monolithic refractory material constructed by the method is mainly used in thermal equipment such as the roof of the heating furnace, the wall of the soaking furnace, and the finned furnace wall of the boiler. Since raw clay is the source of plasticity, but its addition makes the refractory material have low strength and poor linear change performance at room temperature. Contents of the invention [0003] The present invention aims to overcome the above-mentioned deficiencies, and provides a clay-free plastic refractory mater...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 张磊
Owner QINGDAO WEIYE FORGING & STAMPING MACHINERY CO LTD
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