Natural Brazilian Agate Grinding Media Balls

Density: 2.65g/cm³
Shape: sphere
Available Diameter: 3mm~30mm

Description for 5 mm Agate Milling Media

Specifications

High purity natural Brazilian agate (97.26% SiO₂) grinding media balls, highly wear-resistant and resistant to acids (except HF) and solvent, these balls are used whenever small quantity of samples need to be grinded without contamination. Different sizes of agate grinding balls available: 3mm to 20mm. The grinding media balls are extensively applied to in the fields of Ceramics, Electronics, Light Industry, Paint, Ink, Medicine, Food, Geology, Chemical Engineering and so on.

Features

High purity, low contamination to the samples
High cost-effective, low wear and long lifetime
High specific gravity, high grinding efficiency
Highly wear resistant to acid and solvents
Highly polished, smooth, easy to clean, low abrasion to the equipment
High mechanical strength, good toughness, impact resistance, no broken beads
Mainly used for lab planetary ball mill machine

Use of the Milling Media Balls

Pregrinding the coarse, hard material with large balls
Use of many small balls will increase the fine fraction if the running time is increased
A higher mass (spec. weight) of the grinding balls will accelerate the grinding

Size of the Grinding Balls

Type of feed material	Ball diameter
Hard samples feed particle size <10 mm	30 mm or 40 mm
Medium piece size (<5 mm)	20 mm
Fine material (0.5 mm)	10 mm or 5 mm
Homogenisation of dry or liquid samples	10 mm
Homogenisation of viscous samples	20 mm

These are general recommendations: the size of grinding jars and grinding balls should be determined experimentally if necessary.

Choice of Grinding Jars & Grinding Balls

In order to prevent excessive abrasion, the hardness of the grinding jars used and of the grinding balls must be higher than that of the material used. Normally, grinding jars and grinding balls of the same material should be chosen.

Technical Data

Model No.	BA0302
Quantity	1 kg - 5 mm Agate balls, Approx. - 5,770 balls
Main Material	SiO₂
Specific Gravity	2.65 kg/dm³
Bulk Weight	1.5 kg/L
Shape	sphere
Color	ivory white /gray
Ball Diameters	3mm~20mm
Hardness	7.2~7.5 Mohs;
Suitable For	soft to medium-hard samples

Abrasion Resistance	good
Compatible Grinding Jar	agate jar

Element Analysis

General specifications
Main Materials	SiO₂

Chemical composition
Element	Share %
SiO₂	97.26
MgO/CaO/Mn₂O₃	2.74

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