Wear-resisting aluminum oxide ceramic ball isostatic pressing process and special device

A technology of isostatic pressing and special equipment, applied in the direction of ceramic molding machines, manufacturing tools, etc., can solve the problems of poor dimensional consistency, many problems of static pressing machines, inaccurate dimensions, etc., and improve the one-time wet bag method, etc. Effect of static pressure forming, internal quality assurance, high dimensional accuracy

Active Publication Date: 2013-06-26
FOSHAN CERAMICS RES INST GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The method of automatically forming the sprayed powder through the dry bag isostatic press is limited by the press, and the pressure is low (currently the highest pressure can only reach about 40MPa, if the pressure exceeds this pressure, the isostatic press will have many problems and Can not be used stably) and the internal quality is average, the product wear is relatively high, and because only rubber molds can be used, its appearance is rough, the size consistency is not good, and the shape is relatively general
In addition, due to the use of dry powder materials in the mold...

Method used

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  • Wear-resisting aluminum oxide ceramic ball isostatic pressing process and special device
  • Wear-resisting aluminum oxide ceramic ball isostatic pressing process and special device
  • Wear-resisting aluminum oxide ceramic ball isostatic pressing process and special device

Examples

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Effect test

Embodiment 1

[0175] Weigh the main raw materials 60% ceramic roller waste, 25% alumina, 10% kaolin, 4% barium carbonate, 4% dolomite. The raw materials were put into a ball mill and milled for 40 hours to obtain a slurry with a grinding particle size≦5 μm and a water content of 30%, and the fluidity of the slurry was controlled at about 30 seconds. 0.5% polyvinyl alcohol was added to the slurry. The slurry is stirred and removed by an iron remover to obtain a preliminarily treated slurry. The preliminarily treated slurry is sent to the spray drying tower for spray granulation treatment to obtain powder for the production of alumina ceramic balls. In order to improve the molding performance, about 0.03% stearic acid is added to the powder. The powder was pre-molded by a four-column hydraulic press with a molding pressure of 25Mpa to obtain a wear-resistant ball green body. The pre-pressed green body is packaged with a rubber mold by a binding device; and then isostatically pressed by a w...

Embodiment 2

[0177] Weigh the main raw materials 66% ceramic roller waste, 20% alumina, 5% kaolin, 4% barium carbonate, 4.47% dolomite. The raw materials were put into a ball mill and milled for 55 hours to obtain a slurry with a grinding particle size≦4 μm and a water content of 35%, and the fluidity of the slurry was controlled at 35 seconds. 0.5% polyvinyl alcohol was added to the slurry. The slurry is stirred and removed by an iron remover to obtain a preliminarily treated slurry. The preliminarily treated slurry is sent to the spray drying tower for spray granulation treatment to obtain powder for the production of alumina ceramic balls. In order to improve the molding performance, 0.1% stearic acid is added to the powder. The powder was pre-molded by a four-column hydraulic press with a molding pressure of 30 MPa to obtain a green body. The pre-pressed green body is packaged with a rubber mold through a binding device; and then isostatically pressed by a wet bag isostatic press at...

Embodiment 3

[0179] Weigh the main raw materials 84.69% ceramic roller waste, 12% alumina, 1% kaolin, 1% barium carbonate, 1% dolomite. The raw materials were put into a ball mill and milled for 60 hours to obtain a slurry with a grinding particle size≦5 μm and a water content of 40%, and the fluidity of the slurry was controlled at 40 seconds. 0.3% polyvinyl alcohol was added to the slurry. The slurry is stirred and removed by an iron remover to obtain a preliminarily treated slurry. The preliminarily treated slurry is sent to the spray drying tower for spray granulation treatment to obtain powder for the production of alumina ceramic balls. To improve the molding performance, about 0.3% stearic acid is added. The blank was pre-pressed and formed by a four-column hydraulic press with a forming pressure of 35Mpa to obtain a blank. The pre-pressed green body is packaged with a rubber mold by binding equipment; and then isostatically pressed by a wet bag isostatic press at a pressure of 1...

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Abstract

The invention discloses wear-resisting aluminum oxide ceramic ball isostatic pressing process. The process includes a first step of conveying slurry subjected to primary treatment into a spray drying tower for spray granulation treatment to obtain blanks for manufacturing aluminum oxide ceramic balls, a second step of carrying out prepressing molding on the blanks through a four-column hydraulic press to obtain green bodies, a third step of carrying out isostatic pressing molding on the green bodies subjected to prepressing molding in a wet-bag type isostatic pressing machine, and a fourth step of feeding the green bodies subjected to isostatic pressing molding into a kiln for burning under the temperature of 1200-1800 DEG C to obtain the wear-resisting aluminum oxide ceramic balls. The invention further discloses a special device for the wear-resisting aluminum oxide ceramic ball isostatic pressing process. The special device comprises the four-column hydraulic press. The wear-resisting aluminum oxide ceramic ball isostatic pressing process and the special device can improve appearance quality, enable specifications and sizes of products to be accurate, reduce wear rate of the products and improve the inherent quality of the products. Meanwhile, the wear-resisting aluminum oxide ceramic ball isostatic pressing process can improve production efficiency of the products, reduce labor intensity of workers, reduce dust pollution and improve working environment.

Description

technical field [0001] The invention relates to the technical field of ceramic processing and production, in particular to an isostatic pressing molding process of wear-resistant alumina ceramic balls and special equipment thereof. Background technique [0002] Wear-resistant ceramic balls are widely used in ceramics, glass, enamel, pigments, chemicals and other industries. They are grinding balls in various mills and fine crushing equipment. They have high strength, low wear, strong applicability and high crushing efficiency. At present, the production of relatively large (diameter > 25mm) wear-resistant ceramic balls in China mainly has the following two processes. The first production process is as follows: raw material batching - ball milling - squeezing mud - mud training - manual molding - drying - firing, this A kind of production technology production efficiency is low, and labor intensity is big, and working environment is poor. The second production process is ...

Claims

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Application Information

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IPC IPC(8): B28B3/00
Inventor 冯斌苏小红
Owner FOSHAN CERAMICS RES INST GRP CO LTD
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