AG Grinding medium

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AGAluminum oxide

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Product Description

Product Description

It is made with advanced isostatic pressing technology and new formula of high-quality raw materials and is a high-grade grinding medium in ceramics, cement, paint, glaze, chemical medicine, coatings, mines and other industries. It has many advantages such as high hardness, good toughness, high density, low wear, corrosion resistance, regular appearance, environmental protection and no pollution.

Technical indicators

Item	GS320	GS340	GS350	GS360	GS380
Al2O3 content(%)	≥75	≥80	≥90	≥92	≥95
SiO2 content(%)	<20	<16	<7	<5	<3
Fe₂O₃ content(%)	<0.4	<0.2	<0.15	<0.1	<0.1
Na₂O content(%)	<0.8	<0.5	<0.5	<0.4	<0.25
Vulk density(g/cm³)	3.15-3.25	≥3.30	≥3.50	≥3.63	≥3.68
Wear (‰o)	<0.15	<0.12	<0.12	<0.10	<0.07
Mohs hardness	8	9	9	9	9
Water absorption (%)	<0.02	<0.01	<0.01	<0.01	<0.01
Color	灰白色	白色	白色	白色	白色

Microcrystalline wear-resistant alumina pebbles (with isostatic pressing size)

Norm	φ15	φ17	φ20	φ25	φ30	φ40	φ50	φ60	φ70	φ80	φ90
Calibre	15±1	17±1	20±1	25±1.5	30±1	15±2	50±2	60±2	70±3	80±3	90±3

Usages of microcrystalline wear-resistant alumina pebbles

Proportion of pebbles:

It is recommended that the small pebbles (with particle sizes of φ30 and φ40) account for 50% of the whole material, while large pebbles (with particle sizes of φ50, φ60 and φ70) are used in a proportion of 5:3:2; the filling rate of pebbles shall not be less than 51% of the internal volume of the ball mill.

Micro-crystalline wear-resistant alumina pebbles (with rolled size)