Grinding balls for SAG mills are specialized grinding media used in SAG (Semi-Autogenous Grinding) mills. SAG mills are large rotating cylindrical mills that primarily grind ore or other materials by tumbling them with the assistance of lifting plates inside the mill. Grinding balls for SAG mills help in reducing the size of the material being grinded and contribute to the overall efficiency of the grinding process.

The design and characteristics of grinding balls for SAG mills differ from casting grinding balls or grinding cylpebs. They are typically larger in size, ranging from 100mm to 150mm in diameter. This larger size allows for better impact crushing of the ore, resulting in finer particle size reduction.
Grinding balls for SAG mills are commonly made from low alloy steels, medium alloy steels, or special grades of high chromium cast iron. These materials offer high toughness, impact resistance, and wear resistance to withstand the harsh grinding conditions inside the SAG mill.
Manufacturing grinding balls for SAG mills involve similar processes as other grinding media. Initially, the selected raw materials are melted in a furnace. The molten metal is then poured into molds with a spherical cavity, specifically designed to create the desired size and shape of the grinding balls. After solidification, the balls are removed from the molds and subjected to heat treatment processes to optimize their hardness and other mechanical properties.
The performance and effectiveness of grinding balls for SAG mills depend on various factors such as the material being ground, the mill's operating parameters, the desired grinding efficiency, and the specific ore characteristics. It is important to choose the appropriate size, hardness, and composition of the grinding balls to achieve optimal grinding results.
In summary, grinding balls for SAG mills are specialized grinding media designed for use in large rotating SAG mills. They are larger in size compared to regular grinding balls, allowing for better impact crushing of the ore. These grinding balls are made from tough and wear-resistant materials and play a crucial role in the efficiency and effectiveness of the grinding process in SAG mills.