Light porous heat-insulating refractory material and preparation method and applications thereof

A refractory material and lightweight technology, applied in the field of refractory materials, can solve the problems of complex processing, low density and high rejection rate, and achieve the effects of simple preparation process, realization of waste utilization, and low production cost

Inactive Publication Date: 2010-02-03
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the existing refractory technology, especially to solve the problem of large shrinkage rate, high deformation and cracking waste rate, complicated follow-up processing and low strength of heat-insulating bricks after dehydration, drying and firing of the existing refractory brick body To solve such problems, provide a lightweight porous heat-insulating refractory material with low density, low thermal conductivity, high compressive strength, and adjustable pore size

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A lightweight porous heat-insulating refractory material, comprising the following components in weight percentage:

[0036] Bound clay 20%;

[0037] Mullite fiber 3%;

[0038] Expanded Perlite Powder 28%;

[0039] Inorganic binder water glass 20%;

[0040] Polystyrene waste foam balls 3.0%;

[0041] water balance.

[0042] The components are all commercially available products.

[0043] The diameter of the polyethylene foam ball is 0.5-2mm.

[0044] The main component of the bonded clay is SiO 2 , including the following components in weight percentage: SiO 2 55.1%, Al 2 o 3 31.3%, Fe 2 o 3 2.68%.

[0045] The mullite fiber is a polycrystalline fibrous heat-insulating refractory material, including the following components in weight percentage: SiO 2 22.76%, Al 2 o 3 72.34%, Fe 2 o 3 0.41%, the main crystal phase is mullite.

[0046] Described expanded perlite comprises each component of following percentage by weight: SiO 2 72.93%, Al 2 o 3 12.90%...

Embodiment 2

[0061] A lightweight porous heat-insulating refractory material, comprising the following components in weight percentage:

[0062] Bound clay 15%;

[0063] Mullite fiber 3.5%;

[0064] Expanded Perlite Powder 35%;

[0065] Inorganic binder aluminum phosphate 24%;

[0066] Polystyrene waste foam balls 2.8%;

[0067] water balance.

[0068] The diameter of the polyethylene foam ball is 0.5-2mm.

[0069] The main component of the bonded clay is SiO 2 , including the following components in weight percentage: SiO 2 53.5%, Al 2 o 3 31.3%, Fe 2 o 3 2.68%.

[0070] The mullite fiber is a polycrystalline fibrous heat-insulating refractory material, including the following components in weight percentage: SiO 2 22.76%, Al 2 o 3 72.34%, Fe 2 o 3 0.41%, the main crystal phase is mullite.

[0071] Described expanded perlite comprises each component of following percentage by weight: SiO 2 74.13%, Al 2 o 3 12.90%, Fe 2 o 3 0.53%.

[0072] The preparation method is t...

Embodiment 3

[0080] A lightweight porous heat-insulating refractory material, comprising the following components in weight percentage:

[0081] Bound Clay 18%;

[0082] Mullite fiber 3%;

[0083] Expanded Perlite Powder 33%;

[0084] Inorganic binder silica sol 25%;

[0085] Polystyrene waste foam balls 2.5%;

[0086] water balance.

[0087] The diameter of the polyethylene foam ball is 0.5-2 mm.

[0088] The main component of the bonded clay is SiO 2 , including the following components in weight percentage: SiO 2 50.3%, Al 2 o 3 31.3%, Fe 2 o 3 2.68%.

[0089] The mullite fiber is a polycrystalline fibrous heat-insulating refractory material, including the following components in weight percentage: SiO 2 22.76%, Al 2 o 3 72.34%, Fe 2 o 3 0.41%, the main crystal phase is mullite.

[0090] Described expanded perlite comprises each component of following percentage by weight: SiO 2 74.65%, Al 2 o 3 12.90%, Fe 2 o 3 0.53%.

[0091] The preparation method is the same a...

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Abstract

The invention discloses a light porous heat-insulating refractory material which comprises the following component by weight percent: 15-30% of binding clay, 3-10% of mullite fiber, 15-35% of expandedperlite powder, 15-25% of inorganic bonding agent, 1.5-3.5% of waste polystyrene foam balls and the balance of water. In the invention, the light porous heat-insulating material with small density, low heat conductivity and high compressive strength is prepared by adopting the waste polystyrene foam balls as pore-forming material, taking the mullite fiber as reinforcing material, taking the binding clay and the expanded perlite heat-insulating material, adding a certain amount of bonding agent and the like through extrusion forming. The invention overcomes the technical problems that the existing green bricks of refractory material after being dehydrated, dried and sintered have large shrinkage, high scrap rate due to deformation and cracking, and complex subsequent processing, the heat-insulating bricks have lower strength, and the like; and the light porous heat-insulating refractory material has wide application.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a lightweight porous heat-insulating refractory material and its preparation method and application. Background technique [0002] In order to achieve the purpose of heat preservation and energy saving in traditional industrial furnaces, an insulation layer is usually added outside the construction of heavy refractory bricks or heavy unshaped refractory materials. Since the temperature of the insulation materials used is low, this method is suitable for medium and high temperatures. The use on industrial furnaces is extremely limited. At the same time, the existing heavy layer is very thick, the kiln is bulky and heavy, and for the batch furnace, the loss of heat storage is large. In order to solve this problem, a series of lightweight refractory bricks with high service temperature, low bulk density and good heat insulation performance have been develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/00F24H9/00F27D1/00C10B29/00C03B5/00
Inventor 周武艺
Owner SOUTH CHINA AGRI UNIV
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