Import 30-100mm Steel Grinding Balls — Buy in wholesale FOB from Supplier in China

Shandong Huamin Steel Ball Joint-stock Co., Ltd. produces forged and hot rolled steel grinding balls in the 30-100 mm diameter range, manufactured from special high carbon alloy steel and carbon steel grades. The balls undergo controlled heat treatment to achieve surface and volumetric hardness of HRC 60-65, a specification that aligns with GB/T 17445 and ISO 3290 standards for mineral grinding media. These grinding balls function as comminution media in rotating ball mills, where impact and abrasion fracture ore particles in gold mining, iron ore beneficiation, copper ore concentration and cement grinding circuits. The supplier's location in Zhangqiu District of Jinan, Shandong Province, positions it within China's concentrated steel processing region with direct access to raw material supply chains and port logistics.

The manufacturing route differentiates forged balls, formed under high pressure and heat to create a dense, fibrous microstructure, from hot rolled balls produced through rotary rolling mills. Both processes aim to eliminate internal voids and achieve uniform hardness distribution, critical for wear rate consistency and mill throughput stability. The HRC 60-65 hardness specification indicates a quenched and tempered microstructure, typically martensitic or bainitic, with sufficient toughness to resist catastrophic fracture under high-impact milling conditions. Standard packaging options include bulk steel drums and jumbo bags, formats chosen for mechanical loading efficiency and container space utilisation. Typical alloy compositions for this application grade include carbon content of 0.65-0.85 percent, manganese 0.75-1.00 percent, and chromium up to 1.5 percent for enhanced hardenability and corrosion resistance in slurry environments.

Primary buyers include gold mine operators seeking fine grind size for cyanide leaching efficiency, iron ore pellet feed producers, copper concentrators and cement manufacturers grinding clinker and additives. The 30-100 mm diameter range covers SAG mill feed preparation through to regrind and finish milling applications, with larger diameters typically deployed in primary mills and smaller sizes in secondary or tertiary grinding. Shandong Huamin offers these grinding balls for international import and export trade, with buyers advised to confirm exact metallurgical specifications, breakage rate guarantees and wear rate test data for their specific ore hardness and mill operating conditions. The imported supplier tier and harbor trust tier indicate a profile with some platform verification, though buyers should conduct independent supplier qualification.

Shandong Huamin Steel Ball Joint-stock Co., Ltd. is headquartered in Yangjun Village, Guanzhuang Town, Zhangqiu District, Jinan City, Shandong Province, China, postal code 250217. The supplier carries both an imported tier designation and a harbor trust tier, suggesting some degree of platform verification and established export activity. The response rate is recorded at 0.00 with zero average response hours, which may indicate recent profile activation, data collection latency, or that enquiry metrics are not yet populated. No specific export licence numbers, ISO certifications, or audited production capacity figures appear in the provided profile data.

The company positions its product across mineral processing and cement sectors, with explicit references to gold mines, iron ore, copper ore and power generation applications. The technical description indicates awareness of industry standards (GB/T 17445, ISO 3290) and heat treatment requirements, suggesting engineering involvement in product specification rather than pure trading. The joint-stock corporate structure implies multiple shareholders, though ownership details are not provided. Buyers should independently verify the company's forging or rolling equipment capacity, in-house metallurgical laboratory capability, and quality control sampling protocols. The lack of response metric history means initial contact should establish communication reliability and technical competency before order commitment.