Grinding ball specialized for mine

Abstract

The invention discloses a grinding ball specialized for a mine. The grinding ball specialized for the mine comprises the following chemical components in percentage by weight: 1.0-2.9 of C, 5.0-11.5 of Cr, 0.3-0.9 of Si, 0.4-0.8 of Mn, no more than 0.8 of W, 0.05-0.20 of Y, no more than 0.08 of S, no more than 0.08 of P and the balance Fe. In the process of casting, yttrium-base heavy rare earth copper modificator with adding amount accounting for 0.1-0.3 of the molten iron. The grinding ball specialized for the mine of the invention is smelted by using a medium frequency electric furnace and casted by using a metal mould; raw materials use high quality steel pig iron and high quality waste steel and are modified by using ferrochrome, ferromanganese and ferrosilicon; after each chemical component in the molten iron reaches the requirement of the grinding ball specialized for the mine, the yttrium-base heavy rare earth copper modificator is directly added into a foundry ladle; and then the molten iron is poured into the metal models to produce the grinding ball specialized for the mine.

Description

technical field [0001] The invention relates to a special grinding ball for mines, which is suitable for grinding bodies used under the conditions of wet grinding for ore dressing, such as grinding balls and grinding sections of various specifications. Background technique: [0002] Mine special grinding ball is a kind of grinding medium used in grinding engineering. It is mainly used in the grinding engineering of ore dressing and pelletizing. The annual consumption of only one million tons in China is large. Wet method, so when the grinding ball works in the mill, the impact force is large and the corrosion is strong. In order to improve the impact resistance, corrosion resistance and wear resistance of the grinding ball, and reduce the breakage rate and consumption of the grinding ball in use, each Production enterprises and scientific research units are constantly exploring and developing new products and new processes, and have developed high-chromium alloy grinding bal...

AI Technical Summary

Problems solved by technology

[0002] Mine special grinding ball is a kind of grinding medium used in grinding engineering. It is mainly used in the grinding engineering of ore dressing and pelletizing. The annual consumption of only one million tons in China is large. Wet method, so when the grinding ball works in the mill, the impact force is large and the corrosion is strong. In order to improve the impact resistance, corrosion resistance and wear resistance of the grinding ball, and reduce the breakage rate and consumption of the grinding ball in use, each Production enterprises and scientific research units are constantly exploring and developing new products and new processes, and have developed high-chromium alloy grinding balls, medium-chromium alloy grinding balls, low-chromium alloy grinding balls, alloy steel rolling grinding balls, etc., although these The products have been accepted by users, but each has serious shortcomings. Although the high-chromium alloy grinding balls have higher hardness after quenching treatment and better comprehensive mechanical properties, due to the large size of the grinding balls for mineral processing, the impact force is large, and the wet Method grinding is highly corrosive, and the consumption is still high in use. At the same time, high chromium balls contain high chromium and manganese content, which consumes national chromium resources; medium chromium alloy grinding balls and low chromium alloy grinding balls have low hardness and are not corrosion-resistant , high consumption in use, high breakage rate, waste of national resources; alloy steel rolling wear-resistant microspheres have low production efficiency, high energy consumption, high cost, and high consumption in use. Therefore, a resource-saving type is developed. It is imperative to create a new generation of environmentally friendly grinding balls for mines