Porous alumina porcelain sand microspheres, preparation method thereof and application of porous alumina porcelain sand microspheres in injecting tackifying device

A technology of porous alumina and alumina, which is applied in the field of ceramic materials, can solve problems such as difficulty in fully exerting the viscosifying effect of porcelain sand, uneven particle size, etc., and achieve the effects of standardized operation, easy crushing, and high reliability

Active Publication Date: 2017-02-15
青岛宏达赛耐尔科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the existing porcelain sand is generally based on dense ceramics, and the particle size is uneven after crushing, it is difficult to give full play to the viscosifying effect of porcelain sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] An embodiment of the present invention provides a method for preparing porous alumina porcelain sand microspheres, comprising the following steps:

[0022] S1: Add micron alumina powder and ammonia water into deionized water to prepare alumina slurry, shake and ball mill the alumina slurry, and keep stirring for use.

[0023] In this step, the alumina slurry is first prepared with micron alumina powder. In order to obtain a uniform microsphere green body in the subsequent spray drying process, the slurry needs to be further processed, which may include shaking , ball milling, stirring and other processing methods, the purpose is to obtain a more uniform slurry.

[0024] S2: Spray-dry the alumina slurry to be used to obtain an alumina ceramic sand microsphere body.

[0025] S3: rolling the alumina porcelain sand microsphere body in a sugar coating machine to make a semi-finished alumina porcelain sand microsphere body.

[0026] S4: Calcining the semi-finished alumina p...

Embodiment 1

[0039] Add 1 part of micron alumina powder and 0.1 mol / L ammonia water to 10 parts of deionized water to prepare alumina slurry. After vibrating the alumina slurry for 3 minutes in ultrasonic waves, use a particle size of 1mm Zirconium microspheres were milled for 12 hours, and then placed on a magnetic stirrer for continuous stirring for use; the alumina slurry to be used was passed into a spray dryer using a peristaltic pump for spray drying to obtain alumina porcelain sand microspheres; Roll the alumina porcelain sand microsphere body in a sugar coating machine to make a 0.3mm semi-finished alumina porcelain sand microsphere body; Minutes, calcined in a high-temperature rotary furnace at a calcining temperature of 1200° C. for 5 hours, and then cooled to room temperature with the furnace to obtain porous alumina porcelain sand microspheres with a porosity of 10% and a diameter of 0.25 mm.

Embodiment 2

[0041] Add 1 part of micron alumina powder and 0.15 mol / L ammonia water to 15 parts of deionized water to prepare alumina slurry, vibrate the alumina slurry for 5 minutes in the ultrasonic Zirconium microspheres were milled for 24 hours, and then placed on a magnetic stirrer for continuous stirring for use; the alumina slurry to be used was passed into a spray dryer by a peristaltic pump for spray drying to obtain an alumina porcelain sand microsphere body; Roll the alumina porcelain sand microsphere body in a sugar coating machine to make a 1.0mm semi-finished alumina porcelain sand microsphere body; Minutes, calcined in a high-temperature rotary furnace at a calcining temperature of 1400°C for 2.5 hours, and then cooled to room temperature with the furnace to obtain porous alumina porcelain sand microspheres with a porosity of 20% and a diameter of 0.95 mm.

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Abstract

The invention provides porous alumina porcelain sand microspheres, a preparation method thereof and an application of the porous alumina porcelain sand microspheres in an injecting tackifying device, and belongs to the technical field of porcelain materials. The alumina porcelain sand microspheres with high strength and high breaking efficiency can be prepared, so that the adhesiveness between a wheel and a steel rail can be improved effectively. The preparation method comprises the following steps: micrometer alumina powder and ammonia water are added to deionized water, and alumina slurry is prepared, oscillated, subjected to ball milling and stirred continuously for standby application; alumina porcelain sand microsphere blanks are obtained by performing spray drying on the standby alumina slurry; the alumina porcelain sand microsphere blanks are rolled in a sugarcoating machine, and semi-finished alumina porcelain sand microsphere blanks are prepared; the semi-finished alumina porcelain sand microsphere blanks are calcined in a high-temperature rotary kiln and cooled to the room temperature with the kiln, and the porous alumina porcelain sand microspheres with the diameters being 0.25-1.65 mm are obtained. The invention can be used in a preparation process of the porous alumina porcelain sand microspheres for the injecting tackifying device.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a porous alumina porcelain sand microsphere, its preparation method and its application in a jet viscosifying device. Background technique [0002] At present, in the field of high-speed vehicles, in order to increase the adhesion between the wheels and the rails, sand is usually sprinkled between the wheels and the rails, but compared with sanding, a small amount of crushed sand is sprayed between the wheels and the rails accurately and at high speed. Porcelain sand particles can not only prevent wheels from idling and slipping to increase viscosity, but also cost less than sand. Because the existing porcelain sand is generally based on dense ceramics, and the particle size is uneven after crushing, it is difficult to give full play to the viscosifying effect of the porcelain sand. Therefore, it is a technical problem to be solved urgently to provide a kind of alumina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/64B61C15/10
CPCB61C15/10C04B35/10C04B35/64C04B38/009C04B2235/656C04B2235/95C04B2235/96C04B38/0074
Inventor 金鹰马泉杨建锋
Owner 青岛宏达赛耐尔科技股份有限公司
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