Thermal-knock resisting diamond spar-spinele refractory materials and its production

A technology of refractory materials and spinel, which is applied in the field of refractory materials, can solve problems such as pollution, and achieve the effects of reducing production costs, suitable load softening temperature, and good thermal stability

Inactive Publication Date: 2007-04-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding Cr to magnesia spinel 2 o 3 It can promote sintering and increase the density of spinel with different compositions, but chromium will pollute the environment

Method used

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  • Thermal-knock resisting diamond spar-spinele refractory materials and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Ingredients composition

[0030] Aggregate: spinel particles 1-3mm 36%

[0031] Spinel particles below 1mm 10%

[0032] Fused corundum particles 1-3mm 8%

[0033] Fused corundum particles below 1mm 12%

[0034] Mixed powder: corundum powder≤180 mesh 13%

[0035] Alumina powder≤320 mesh 12%

[0036] Fused magnesium powder≤320 mesh 5%

[0037] Titanium dioxide≤320 mesh 4%

[0038] Additional binder: 3% yellow dextrin solution with a concentration of 20%

[0039] (2) Process

[0040] As shown in the attached picture, the mixed powder mixing process is carried out in a ball mill. The aggregate mixing process uses a 750-type planetary sand mixer. After the aggregate is mixed evenly, the binder is added for wet mixing, and then the mixed powder is added and stirred evenly. Sealed Place for 4 to 24 hours. Forming with a 400-ton friction brick press, drying with a tunnel kiln dryer at 60-80°C, with a residual moisture of les...

Embodiment 2

[0042] (1) Ingredients composition

[0043] Aggregate: Spinel particles 1-3mm 36%

[0044] Spinel particles below 1mm 4%

[0045] Fused corundum particles 1-3mm 8%

[0046] Fused corundum particles below 1mm 22%

[0047] Mixed powder: corundum powder≤180 mesh 10%

[0048] Alumina powder≤320 mesh 11%

[0049] Fused magnesium powder≤320 mesh 7%

[0050] Titanium dioxide≤320 mesh 2%

[0051] Additional binder: 5% yellow dextrin solution with a concentration of 20%

[0052] (2) Process

[0053] The highest firing temperature is 1680°C, other processes are as in Example 1

Embodiment 3

[0055] (1) Ingredients composition

[0056] Aggregate: Spinel particles 1-3mm 40%

[0057] Spinel particles below 1mm 10%

[0058] Fused corundum particles 1-3mm 6%

[0059] Fused corundum particles below 1mm 9%

[0060] Mixed powder: corundum powder≤180 mesh 10%

[0061] Alumina powder≤320 mesh 12%

[0062] Fused magnesium powder≤320 mesh 3%

[0063] Titanium dioxide≤320 mesh 10%

[0064] Additional binder: 4% yellow dextrin solution with a concentration of 20%

[0065] (2) Process

[0066] Technological process is as embodiment 1.

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Abstract

A diamond spar-spinele refractory material with high-thermal shock resistance and its production are disclosed. The process is carried out by taking spinel grain and electric-melting diamond spar grain as aggregate, taking diamond spar powder, aluminum oxide powder, electric-melting magnesium powder and titanium pigment as substrates, taking industrial citrine as binder and sintering at 1000-1650 degree in industrial furnace and metallurgical kiln lining. It has excellent thermal stability and high-temperature resistance, better mechanical strength and alkali resistance and abrasion resistance. It can be used for various non-ferrous metal metallurgical kilns, cement rotary kiln, high-temperature tunnel kiln and glass kiln.

Description

technical field [0001] The invention relates to a refractory material, in particular to a corundum-spinel refractory material with high thermal shock resistance and a preparation method thereof. Background technique [0002] With the development of modern science and technology, metallurgical production, ceramics and building materials and kiln furniture have put forward higher requirements for the quality of high-temperature materials. While reducing their production costs, vigorously promote environmentally friendly and resource-saving materials. [0003] Several main refractory raw materials in my country include bauxite-based raw materials, including fused corundum, spinel, and mullite; Magnesia chromium sand; non-oxide materials, including ferrosilicon nitride and silicon nitride. The comprehensive utilization of these raw materials to prepare new materials with excellent properties has aroused widespread concern. Adding Cr to magnesia spinel 2 o 3 It can promote sin...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 王家邦王立旺
Owner ZHEJIANG UNIV
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