A medium-density grinding-ball grade positioned between economy media and 92% high alumina. Final suitability depends on the mill, material, target fineness and acceptable media wear.
| Al₂O₃ Content | Typically ≥ 75% |
|---|---|
| Density | Approx. 3.15 – 3.25 g/cm³ |
| Hardness | Approx. Mohs 8 – 9 |
| Water Absorption | ≤ 0.01% |
| Available Shape | Ball |
| Common Size Range | 10 – 90 mm, supplier-specific |
| Typical Color | Gray / beige |
| Packing | Commonly 25 kg bags; pallet or bulk options by quote |
| FOB Port | Qingdao, China |
Reference specifications compiled from public manufacturer materials; they are not a quotation or batch certificate. Available sizes, tolerances, packing and test documents will be confirmed for the selected manufacturing partner before order.
75% alumina is a medium-density option. Public manufacturer data places it above 68% economy media in alumina content and density, but actual wear performance must be compared using like-for-like test methods.
Choose 75% when: you want a middle position between purchase cost and density for ceramic or mineral ball milling, without automatically specifying 92% media.
Consider a different grade when: lowest initial cost is decisive (→ compare 68%), or finer media, higher density and tighter chemistry are required (→ compare 92% or an actual 95% specification).
Ball milling of ceramic raw materials where a medium-density option is preferred over an economy grade. Confirm cycle time and media wear in the actual mill.
A potential mid-range choice for selected glaze and frit duties. Verify color, contamination tolerance and finished-particle requirements before selection.
Grinding of feldspar, quartz, kaolin and similar materials where the quoted chemistry, density and wear level fit the final product.
A candidate when moving up from lower-density media without immediately specifying 92%. Compare throughput, wear and total media cost in a controlled trial.
Public product ranges cover Ø 10 – 90 mm, while some suppliers list only 30 – 60 mm. Confirm exact availability per quote.
Share the mill, material, target fineness and current media. These inputs matter more than alumina percentage alone.
25 kg bags are common. Palletized or bulk packing, net weight and container loading are confirmed per offer.
Tell us your application, quantity and destination. We'll acknowledge your inquiry within one business day, then confirm parameters, pricing and lead time with the selected supply partner.
Get a QuoteAn economy ball grade for ceramic body and general mineral milling where its quoted wear and chemistry fit.
View 68%Higher-density media for fine grinding and applications where iron pickup matters.
View 92%Higher alumina content for processes that require a supplier-confirmed 95% chemistry.
View 95%