High-density ceramic fiber board with curved surface structure and preparation method thereof

A technology of ceramic fiber board and curved surface structure, applied in the field of ceramic fiber board, can solve the problems of powder sinking, affecting product quality, fiber floating, etc., to achieve good wrapping ability, reduce raw material pretreatment links, and prevent cracking.

Inactive Publication Date: 2021-04-16
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, because the surface of the inorganic mineral fiber raw material used in the raw material is smooth, it cannot effectively wrap the powder raw material, resulting in uneven mixing of the fiber raw material and the added powder raw material during the preparation process, and thus uneven powder distribution in the green body obtained by molding , The problem of powder sinking and fiber floating affects product quality

Method used

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  • High-density ceramic fiber board with curved surface structure and preparation method thereof

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preparation example Construction

[0065] The present invention provides a method for preparing a high-density ceramic fiberboard with a curved surface structure described in the above technical solution, comprising:

[0066] mixing inorganic composite fibers, organic fibers, glass fiber chopped strands, refractory fillers, cationic organic binders and anionic inorganic binders to obtain slurry;

[0067] After the slurry is formed, it is pressed with an arc-shaped mold to obtain a wet billet;

[0068] The wet body is dried to obtain a high-density ceramic fiber board with a curved surface structure.

[0069] In the present invention, the inorganic composite fiber preferably includes at least one blown fiber and two kinds of spun fibers. The blown fiber refers to a fiber prepared by blowing, and the blowing method can use existing There is an existing process in the technology, and the ejected fiber has the characteristics of thin fiber diameter and short fiber length; the spin-off fiber refers to ceramic fiber...

Embodiment 1

[0107] Soak 200Kg of wood pulp fibers in water for 24 hours, then add 2 tons of water to the Volta beater, turn on the Volta beater for beating for 25 minutes, add water to dilute, make a slurry with a mass concentration of 5%, and pump it into a wood pulp storage tank for standby.

[0108] Add 3 tons of water to the hydropulper, add 80Kg of ceramic fiber high-purity spinning cotton, and beat for 10 minutes; then add 80Kg of ceramic fiber standard blown cotton, and beat for 5 minutes; then add 200kg of soluble ceramic fiber, Beat for another 5 minutes and then add 150Kg of wood pulp fiber slurry, mix and beat for 5 minutes.

[0109] Add 9Kg of glass fiber chopped strands with a length of 10mm to the hydraulic pulper, mix and beat for 3 minutes.

[0110] Add 250Kg of Guangxi white mud and 150Kg of white silica powder to the hydraulic pulper, mix and beat for 5 minutes.

[0111] Add 60Kg of cationic potato hot-soluble starch, add water to dilute the mass concentration of the co...

Embodiment 2

[0122] According to the method of Example 1, the high-density ceramic fiberboard with curved surface structure is prepared. The difference from Example 1 is that the ceramic fiber high-purity spun silk cotton is replaced by the ceramic fiber standard spun silk cotton, and the structural size of the arc-shaped mold is adjusted. .

[0123] According to the method of Example 1, the high-density ceramic fiberboard with curved surface structure prepared in Example 2 of the present invention is tested, and the test result is that the bulk density of the high-density ceramic fiberboard with curved surface structure prepared in Example 2 of the present invention is 834Kg / m 3 , the compressive strength is 6.8MPa, the average thermal conductivity at 350°C is 0.106w / (m·k), and the heating permanent line change rate at 1000°C for 24 hours is -1.0%; the chemical composition includes: SiO 2 The mass content is 69.6%, Al 2 o 3 The mass content of CaO is 15.2%, the mass content of CaO is 6....

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Abstract

The invention provides a high-density ceramic fiber board with a curved surface structure. The curvature radius of the high-density ceramic fiber board with a curved surface structure is larger than or equal to 500 mm. The thickness is 5-15 mm; and the central angle of the circular arc is 20-80 degrees. Due to the fact that the resilience of a high-density board wet blank is poor, when the curvature radius is smaller than 500 mm and the product thickness is larger than 15 mm, cracks are prone to occurring at the two ends of the curved surface; after the curvature radius is increased, the tensile stress of the high-density board wet blank is correspondingly reduced, so that the thickness of the product can be increased without cracking. The invention further provides a preparation method of the high-density ceramic fiber board with a curved surface structure.

Description

technical field [0001] The invention belongs to the technical field of ceramic fiber boards, and in particular relates to a high-density ceramic fiber board with a curved surface structure and a preparation method thereof. Background technique [0002] At present, the high-density ceramic fiber boards used in ladles are generally flat products with a small size of 200*100*10mm. The ceramic fiber board is not closely attached to the ladle wall, and the heat insulation effect of the high-density ceramic fiber board cannot be maximized. [0003] At the same time, the existing high-density ceramic fiberboard needs to be chopped in advance during the preparation process to make the prepared fiberboard meet the density and strength requirements, but this process is complicated to operate and is not conducive to the continuous production of the process. If the density is further increased, it is necessary to perform secondary hardening of the inorganic binder on the once-molded ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/24C04B28/00C04B111/28
Inventor 刘超刘焕英邢桃芬段良玉桑林
Owner LUYANG ENERGY SAVING MATERIALS CO LTD
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