We focus on the production and export of grinding media ball and steel rods, and have our own factory in Ma'anshan, Anhui. The factory has advanced production equipment, experienced technical personnel, and an annual production capacity of up to 70,000 tons. All performance indicators of the product have reached the international advanced level.
The quality of ball mill steel balls not only affects productivity, but also affects grinding ball media consumption, which in turn affects the cost of grinding media. It is wrong to simply pursue high hardness and low unit consumption. High hardness and low unit consumption do not mean low cost. Balls with high hardness and low unit consumption are often very expensive. High hardness does not necessarily increase productivity, or even decrease it. Only high productivity can reduce various unit consumption indicators.
When selecting steel balls, there are two issues that are often overlooked: the harder the steel ball, the better, but its appropriate hardness value; the density of the steel ball is also an issue that cannot be ignored. Regarding the influence of hardness, generally speaking, as the hardness increases, as long as no crushing occurs, the unit consumption of steel balls decreases; and the deformation of the sphere can be small. During crushing, the deformation of the sphere is small, and more energy can be used for crushing mineral particles. The productivity of the mill can be increased. However, the increase in the hardness of the steel ball can only be moderate and has an appropriate range. Harder is not always better. If only ball consumption is considered, the higher the hardness, the lower the consumption. However, in terms of mill productivity, within a certain range, the productivity increases as the hardness of the steel ball increases. However, when the hardness exceeds a certain range, it will have an adverse effect on the mill productivity, causing the mill productivity to decrease.
There are two reasons why the hardness of the grinding ball media is too high, which is detrimental to grinding: ① The steel ball bounces back severely, causing some energy loss during the rebound. Therefore, the energy of the steel ball is not used more for crushing, thus affecting the crushing; ② When the hardness of the steel ball is too high, the balls will slide violently when they contact each other, and the mineral particles between the balls cannot be effectively gnawed, thereby weakening the grinding effect of the mineral particles. Regarding the impact of steel ball density on grinding, generally speaking, balls with the same size have higher density and have higher productivity, while balls with lower density have lower productivity. The density of steel balls is affected by three factors: ① Influence of material, steel, cast iron, alloy steel, etc. Different materials have different densities. The density of steel is higher than that of cast iron, while alloy steel varies according to the density and content of the main alloy elements. ② Influence of the manufacturing method of steel balls. The structure of rolled and forged steel balls is dense, so the density is high. The structure of cast cast steel balls, cast iron balls or cast alloy balls is not very dense, and there are even pores in them, so the density is high. Smaller. ③The influence of the metallographic structure of steel balls. The densities of different crystal structures such as martensite, austenite, bainite, and ferrite are also different, which also affects the crystal fineness.
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