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A manufacturing method of a high-strength small-size mill ball

A production method and small-scale technology, which can be applied in chemical instruments and methods, other chemical processes, granulation in rotating discs/pots, etc., and can solve the problems of short molding time, low rolling energy, and low green body density. Achieving the effect of low cost and increased strength

Active Publication Date: 2015-05-13
江苏金石研磨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main forming method of small-sized grinding balls is roll forming. Due to factors such as short forming time, low rolling energy, and self-growth of the green body, the green body has low density and poor sphericity. There are obvious deficiencies in strength and roundness, which limit its wide use
For the same formula, the strength normalized value (strength / (diameter*diameter)) of large-sized grinding balls is significantly higher than that of small-sized grinding balls, and the process conditions limit the maximum performance of formula performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] First, add 200 kg of alumina with a particle size of 0.15-0.25mm into the 4.2m ball rolling machine, and turn on the ball rolling machine. At this time, the ball rolling machine has an inclination angle of 38° and a rotational speed of 12r / min. Start feeding, the maximum particle size of the raw material is 1 μm, the control feeding amount is 2.5kg / min, the interval time after feeding is 20s, the water adding amount is 0.45kg / min, and the interval time after adding water is 16s. When the powder is wrapped on the mother core and grows to 0.4-0.6mm, the feeding amount is controlled at 5kg / min, the water adding amount is 0.9kg / min, and the interval between feeding and water is 12s. Evenly grow to 0.8-1.0mm, stop adding water and feeding materials, adjust the inclination angle of the ball rolling machine to 42°, and the speed to 16r / min, and perform surface lightening. During the period, depending on the surface humidity of the green body, add a small amount of powder, and t...

Embodiment 2

[0017] First, add 125 kg of silica with a particle size of 0.2-0.3mm into the 3.6m ball rolling machine, and turn on the ball rolling machine. At this time, the ball rolling machine has an inclination angle of 36° and a rotational speed of 15r / min. Start feeding, the maximum particle size of raw materials is 0.8μm, control the feeding amount to 2kg / min, the interval time after feeding is 25s, the water adding amount is 0.5kg / min, and the interval time after adding water is 20s. When the powder is wrapped on the mother core and grows to 0.5-0.7mm, the feeding amount is controlled to 4.5kg / min, the interval time after feeding is 20s, the water adding amount is 1kg / min, and the interval time after adding water is 15s. Evenly grow to 1.0-1.2mm, stop adding water and feeding materials, adjust the inclination angle of the ball rolling machine to 40°, and the speed to 20r / min, and perform surface lightening. During the period, depending on the surface humidity of the green body, add a...

Embodiment 3

[0019] First, add 50 kg of zirconium silicate with a particle size of 0.1-0.2mm into the 3.0m ball rolling machine, and turn on the ball rolling machine. At this time, the ball rolling machine has an inclination angle of 39° and a rotational speed of 20r / min. Start feeding, the maximum particle size of the raw material is 0.9 μm, the feeding amount is controlled to be 1 kg / min, the water adding amount is 0.2 kg / min, and the interval between feeding and water is 20s. When the powder is wrapped on the mother core and grows to 0.3-0.4mm, the feeding amount is controlled at 2kg / min, the water adding amount is 0.35kg / min, and the interval between feeding and water is 14s. Evenly grow to 0.6-0.8mm, stop adding water and feeding materials, adjust the inclination angle of the ball rolling machine to 43°, and the speed to 25r / min, and carry out surface lightening. During the period, depending on the surface humidity of the green body, add a small amount of powder, and the lightening tim...

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Abstract

The invention discloses a novel process for manufacturing a high-strength small-size mill ball by using a large-scale ball rolling machine as a forming device and through granulation by using a mother nucleus and powder material grading optimization. Firstly, granulation is performed by adopting one or more of raw materials as the mother nucleus, the large-scale ball rolling machine is used, and the optimized grading raw materials are added according to a certain material water ratio, and forming is performed by rolling. Finally, parameters of the ball rolling machine are adjusted, surface levelling of a ball blank is achieved, and after sintering, the small-size mill ball having a high degree of sphericity, high strength and low abrasion is obtained.

Description

technical field [0001] The invention relates to the field of making grinding balls, in particular to a method for making small-sized grinding balls. Background technique [0002] The ultra-fine treatment of industrial powder is mainly realized by the grinding action between the grinding balls. The small-sized grinding balls have smaller contact surface and more quantity, and the powder with small particle size and narrow distribution range can be obtained. As people's requirements for powder fineness are getting higher and higher, the large-scale use of small-sized grinding balls will become an industry trend. At the same time, as the fineness of the abrasive decreases, the viscosity of the slurry increases, the temperature rises, and the production conditions become more severe, and the wear and extrusion force on the grinding ball is greater, which requires the grinding ball to have higher strength and Less wear and tear. [0003] Small-sized grinding balls with high str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/14C09K3/14
CPCB01J2/14C09K3/1409
Inventor 王俊甫邓伟周雄高广智曹灿宋书明廖建中
Owner 江苏金石研磨有限公司
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