Method for preparing large-sized ceramic grinding balls

A large-size, grinding ball technology, applied in the field of grinding media, to achieve the effect of low one-time investment, simple and controllable process flow, and improved yield

Inactive Publication Date: 2010-10-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it can only form millimeter-sized or even smaller ceramic balls.

Method used

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  • Method for preparing large-sized ceramic grinding balls
  • Method for preparing large-sized ceramic grinding balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Zirconia ceramic grinding ball

[0034] In the present embodiment, the mold that adopts is graphite mold, and its structure is as follows figure 1 As shown in , each mold has 16 spherical cavities.

[0035] The raw material is commercially available 8% yttria-stabilized zirconia powder (purity>99%), with an average particle size of 0.5 microns. Prepare 1000ml premixed solution, the mass ratio is: 10% acrylamide; 1% N,N'-methylenebisacrylamide; 2% ammonium polyacrylate; 87% deionized water.

[0036] Prepare a slurry with a mass solid content of 80%, and ball mill and mix for 2 hours.

[0037]Add the catalyst tetramethylethylenediamine and the initiator ammonium persulfate respectively, the addition amount is 0.2% of the mass of the above slurry, and after vacuum stirring and degassing for 15 minutes, inject the slurry from the gate of the mold, when the slurry Until it comes out of the riser, the mold is then transferred to an oven preheated to 80°C and ...

Embodiment 2

[0040] Embodiment 2: alumina ceramic grinding ball

[0041] In this embodiment, the mold used is a plastic mold, and its structure is as follows figure 1 As shown in , each mold has 16 spherical cavities.

[0042] The raw material is commercially available α-alumina (purity>99.5%) with an average particle size of 1 micron. Prepare 1000ml premixed solution, the mass ratio is: 9% acrylamide; 0.45% N,N'-methylenebisacrylamide; 0.55% ammonium polyacrylate; 90% deionized water.

[0043] Prepare a slurry with a mass solid content of 70%, and ball mill and mix for 5 hours.

[0044] Add the catalyst tetramethylethylenediamine and the initiator ammonium persulfate respectively, the addition amount is 0.15% of the above-mentioned slurry mass, and after vacuum stirring and degassing for 20 minutes, inject the slurry from the gate of the mold, when the slurry Until it emerges from the riser, the mold is then transferred to an oven preheated to 70°C for 20 minutes. The mold is placed a...

Embodiment 3

[0047] Embodiment 3: silicon nitride ceramic grinding ball

[0048] In this embodiment, the mold used is an aluminum alloy mold, and its structure is as follows figure 1 As shown in , each mold has 16 spherical cavities.

[0049] The raw material is commercially available silicon powder (purity > 99%), the particle size distribution is 1-30 micron, and the average particle size is 10 micron, with 4% aluminum oxide and 1% yttrium oxide as sintering aid (the ratio of sintering aid is the mass ratio relative to the silicon powder). Prepare 1000ml premixed solution, the mass ratio is: 12% acrylamide; 0.6% N,N'-methylenebisacrylamide; 1% ammonium citrate; 86.4% deionized water.

[0050] Prepare a slurry with a mass solid content of 60%, and ball mill and mix for 3 hours.

[0051] Add the catalyst tetramethylethylenediamine and the initiator ammonium persulfate respectively, and the addition amount is 0.1% of the above-mentioned slurry mass, and after vacuum stirring and degassin...

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Abstract

The invention discloses a method for large-sized ceramic grinding balls, which belongs to the technical field of grinding media. The method comprises: firstly, preparing monomer solution for gelcasting; secondly, adding ceramic powder into the monomer solution, stirring the solution uniformly to obtain stable slurry, adding a catalyst and an initiator into the slurry, stirring the slurry under vacuum to exhaust air; and finally, pouring the slurry into a mold, keeping the temperature of the slurry till the monomer reacts with a crosslinker completely to obtain a ceramic grinding ball biscuit, and drying and sintering the biscuit to obtain the ceramic grinding ball. The ceramic grinding ball manufactured by the method has high strength, hardness, wear resistance, corrosion resistance and high-temperature stability; meanwhile, the size of the ball can be controlled by the size of the ball mold cavity of the mold; and the method is particularly suitable for forming large-sized ceramic grinding balls, is low in cost and makes industrial production easy.

Description

[0001] The present invention is a divisional application of the application number: 200810038834.6, the name of the invention: the method for preparing large-sized ceramic grinding balls and the mold for molding, the applicant: Shanghai Jiaotong University, and the application date: June 12, 2008. technical field [0002] The invention relates to a method in the technical field of grinding media, in particular to a method for preparing large-sized ceramic grinding balls. Background technique [0003] Ceramic grinding balls are widely used as grinding media in ceramics, electronics, building materials, iron and steel metallurgy and other related fields because of their excellent characteristics such as high hardness, high strength, high temperature resistance, wear resistance and corrosion resistance. The existing ceramic balls used as grinding media are mainly prepared by two processes. One of the processes is the cold isostatic pressing process. Although this process can for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/624
Inventor 李飞骆兵何博周洪孙宝德
Owner SHANGHAI JIAO TONG UNIV
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