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 dens

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 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] External binding agent: 20% yellow dextrin solution 3%

[0039] (2) Process

[0040] As shown in the figure, the mixing process of the mixed powder is carried out in a ball mill, and the aggregate mixing process adopts a 750 planetary sand mixer. After the aggregate is evenly mixed, the binder is wet-mixed, and then the mixed powder is added, and the mixture is evenly mixed. Place for 4-24 hours. Molding adopts 400-ton friction brick press, drying adopts tunnel kiln dryer at 60-80℃, residual moisture is less than 1%, firing adopts tunnel ...

Example Embodiment

[0041] Example 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] External binding agent: 20% yellow dextrin solution 5%

[0052] (2) Process

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

Example Embodiment

[0054] Example 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] External binding agent: 20% yellow dextrin solution 4%

[0065] (2) Process

[0066] The process is as in Example 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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