It is a key focus for major gold mining enterprises that how to improve grinding efficiency and reduce comprehensive consumption by optimizing the grinding media. The "Forged Steel Ball B2 （Small Ball）with Forged Steel Ball B3 （Large Ball）" combined grinding solution successfully addresses the industry pain points of high breakage rates for large balls and insufficient wear resistance for small balls, achieving a perfect balance between performance and economy.

Large-diameter steel balls (above 70mm) primarily undertake the task of coarse crushing under harsh conditions. The B3 material has been optimized specifically for this challenge: its carbon content is approximately 0.17% lower than that of B2, effectively reducing quenching brittleness and making the balls less prone to breakage, with actual breakage rates controlled to no more than 0.5% . The 1.39% increase in silicon content significantly enhances ductility and tensile strength, ensuring impact resistance. Furthermore, the chromium content is increased by 0.3% . Combined with an optimized manganese and chromium ratio, this gives B3 superior surface and core hardness compared to B2, greatly improving wear resistance. Field data indicates that, depending on the ore type, the consumption rate of B3 large balls is 30% lower than that of B2, and can reach up to 50% in some conditions, making B3 the ideal choice for large balls above 70mm.

For small-diameter steel balls (below 70mm), the operating conditions involve fine grinding with low impact forces, resulting in inherently very low breakage rates. In this scenario, there is virtually no difference in breakage rates between B2 and B3, while B2 offers a significant cost advantage. Therefore, using B2 small balls for smaller sizes ensures grinding performance while minimizing procurement costs.

The "B2 small ball + B3 large ball" combination solution precisely matches the needs of different grinding stages in gold mines. It reduces overall wear and tear while increasing mill running time, making it a preferred strategy for mining enterprises to enhance efficiency and reduce costs.

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