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Energy-efficient mullite zirconia multiphase refractory material, and preparation method thereof

A refractory material and mullite technology, applied in the field of refractory materials, can solve the problems of unfavorable large-scale production, complex production process and high production cost, and achieve the effect of realizing resource utilization, alleviating volume deformation and low production cost.

Pending Publication Date: 2019-09-03
无锡市宜刚耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] "A method for preparing mullite powder using fly ash as raw material" (ZL201210255167.3) and "Method for preparing mullite at low temperature from modified kaolin" (ZL201210104659.2) patented technology, although the mullite material is produced, But the main disadvantages are: high production cost and complex production process, which is not conducive to the realization of large-scale production; the use of fluorine-containing compounds causes environmental pollution
"A method of producing mullite by using fly ash" (ZL201210005536.3) patented technology, although this technology uses pretreated fly ash as raw material to obtain mullite by roasting, a large amount of waste water will be generated in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An energy-saving mullite zirconia composite refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0026] Press Al 2 o 3 : SiO 2 The mass ratio of zirconite tailings and bauxite is (2.55-2.65): 1, and the mixture is obtained by mixing zircon tailings and bauxite; then adding 3-4wt% titanium oxide, 0.6-0.8wt% lanthanum oxide, 4-6wt% polyvinyl alcohol and 30-33wt% water are ball-milled for 5-7 hours to obtain a ball mill; then the ball mill is extruded, dried, and kept at 1550-1580°C for 7-8 hours, naturally cooling to obtain an energy-saving mullite zirconia composite refractory material.

[0027] In this example:

[0028] The zircon tailings: Al 2 o 3 The content is 40~43wt%; SiO 2 The content is 47~50wt%; ZrO 2 The content is 7.0-7.2wt%.

[0029] The alumina: Al 2 o 3 The content is 80~81wt%; SiO 2 The content is 14-15wt%.

[0030] The energy-saving mullite zirconia composite refractory material pre...

Embodiment 2

[0032] An energy-saving mullite zirconia composite refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0033] Press Al 2 o 3 : SiO 2 The mass ratio of zirconite tailings and bauxite is (2.65-2.75): 1, and the mixture is obtained by mixing the zircon tailings and bauxite; then adding 4-5wt% titanium oxide, 0.6-0.8wt% lanthanum oxide, 4-6wt% polyvinyl alcohol and 33-36wt% water are ball-milled for 5-7 hours to obtain a ball mill; then the ball mill is extruded, dried, and kept at 1580-1610°C for 6-7 hours, naturally cooling to obtain an energy-saving mullite zirconia composite refractory material.

[0034] In this example:

[0035] The zircon tailings: Al 2 o 3 The content is 43~46wt%; SiO 2 The content is 44~47wt%; ZrO 2 The content is 7.2-7.4wt%.

[0036] The alumina: Al 2 o 3 The content is 81~82wt%; SiO 2 The content is 13-14wt%.

[0037] The energy-saving mullite zirconia composite refractory material...

Embodiment 3

[0039] An energy-saving mullite zirconia composite refractory material and a preparation method thereof. The preparation method described in this embodiment is:

[0040] Press Al 2 o 3 : SiO 2 The mass ratio is (2.75-2.85): 1, and the zircon tailings and bauxite are mixed to obtain the mixture; then add 3-4wt% titanium oxide, 0.6-0.8wt% lanthanum oxide, 4-6wt% polyvinyl alcohol and 36-39wt% water are ball-milled for 5-7 hours to obtain a ball mill; then the ball mill is extruded, dried, and kept at 1610-1640°C for 5-6 hours, naturally cooling to obtain an energy-saving mullite zirconia composite refractory material.

[0041] In this example:

[0042] The zircon tailings: Al 2 o 3 The content is 46~49wt%; SiO 2 The content is 41~44wt%; ZrO 2 The content is 7.4-7.6wt%.

[0043] The alumina: Al 2 o 3 The content is 82~83wt%; SiO 2 The content is 12-13wt%.

[0044] The energy-saving mullite zirconia composite refractory material prepared in this example is analyzed b...

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Abstract

The invention relates to an energy-efficient mullite zirconia multiphase refractory material, and a preparation method thereof. According to the preparation method, zircon mine tailing and alumina aremixed at a Al2O3:SiO2 mass ratio of (2.55-2.85) :1 so as to obtain a mixture; titanium oxide accounts for 3 to 5wt% of the mixture, lanthana accounts for 0.6 to 0.8wt% of the mixture, polyvinyl alcohol accounts for 4 to 6wt% of the mixture, and water accounts for 30 to 40wt% of the mixture are added, and ball milling is carried out for 5 to 7h so as to obtain a ball milling product; the ball milling product is subjected to extrusion moulding and drying, and thermal insulation treatment at 1550 to 1650 DEG C for 4 to 8h, and natural cooling is carried out so as to obtain the energy-efficient mullite zirconia multiphase refractory material. The preparation method is low in production cost, low in environment pollution, and convenient for industrialized production. The prepared energy-efficient mullite zirconia multiphase refractory material is relatively low in thermal expansion coefficient, excellent in energy saving effect, and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. Specifically relates to an energy-saving mullite zirconia composite refractory material and a preparation method thereof. Background technique [0002] Mullite has many advantages such as small thermal expansion coefficient, high refractoriness and strong electrical insulation, and is widely used in refractory, chemical and electric industries. Zirconia has different crystal phases, the monoclinic crystal phase is stable below 1170°C, the tetragonal crystal phase is stable between 1170-2570°C, and the cubic crystal phase is stable between 2570-2680°C (melting point). The introduction of zirconia in the preparation process of mullite can greatly improve the mechanical properties of the material by using the phase transformation toughening of zirconia. [0003] Zircon tailings are solid wastes generated during zircon mining and beneficiation. Using zircon tailings to prepare mullite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/622
CPCC04B35/185C04B35/622C04B35/66C04B2235/3227C04B2235/3232C04B2235/3244C04B2235/5427C04B2235/5436C04B2235/77C04B2235/96C04B2235/9607
Inventor 向若飞李远兵李淑静王海路周子孟
Owner 无锡市宜刚耐火材料有限公司
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