A high proportion of chromium carbides delivers top-tier wear resistance, with overall wear rates far lower than those of medium- and low-chromium steel segments; Addressing the structural characteristics of stress concentration at the end faces and edges of the steel segments, the heat treatment process has been optimised to release internal stresses within the edges, significantly reducing the risk of chipping, corner loss and column breakage, whilst maintaining an intact cylindrical shape during long-term operation. Service life is more than doubled compared to low-chromium steel segments and increased by over 40 per cent compared to medium-chromium steel segments, substantially extending the refilling cycle.

Unlike the point-contact crushing action of steel balls, cylindrical steel segments create continuous surface-to-surface grinding through friction and kneading. This results in a narrower particle size distribution and more uniform particle shape in the finished powder, whilst allowing for controlled proportions of ultra-fine powder; Combined with a high-chromium, high-hardness matrix, iron powder leaching is minimal when grinding high-purity materials, ensuring the finished powder remains uncontaminated and perfectly meeting the quality requirements for high-end, fine powders.

The high-chromium matrix forms a dense passivated protective film, offering significantly superior resistance to corrosion from acidic and alkaline slurries and high-sulphur materials compared to medium- and low-chromium steel segments. In wet processing of precious metals and the grinding of corrosive chemical raw materials, there are no issues with surface spalling, pitting or perforation; it maintains excellent hardness retention in high-temperature dry environments, making it suitable for applications such as cement clinker finishing mills and high-temperature ultra-fine grinding of pulverised coal.

With excellent overall hardenability, the hardness is uniform throughout the column, ensuring consistent wear rates across the end faces, side walls and edges, and preventing issues such as rapid local deformation or concavity of the end faces. During the wear process, the column morphology and filling ratio remain stable, ensuring that the media grading within the mill is maintained at an optimal level over the long term, thereby significantly reducing operational downtime for replenishment and grading adjustments.

Designed specifically for high-value-added, high-wear fine grinding stages, these media are widely used in the final grinding of finished products in large-scale cement production lines; the secondary fine grinding of non-ferrous metal ores such as gold, silver and copper; the deep processing of non-metallic minerals such as high-purity quartz and kaolin; and the ultra-fine grinding of lithium battery raw materials and chemical feedstocks. Although the purchase cost per metric tonne is higher, their exceptionally long service life and low wear characteristics result in a lower overall grinding cost per metric tonne of material.

Standard sizes range from φ7×7 mm to φ50×60 mm; we support customisation of specific aspect ratios and mixed-specification blends according to customers’ mill parameters. Chemical composition, hardness and metallographic test reports are provided for each batch. We offer export-specific packaging such as tonne bags and steel drums; delivery lead times for large-volume orders are consistent, and we support various international trade terms including FOB and CIF.