Grinding ball specialized for mine

A technology for mines and grinding balls, applied in the field of special grinding balls for mines, can solve the problems of low production efficiency of alloy steel rolling wear-resistant microspheres, high chromium and manganese content in high-chromium balls, and consumption of national chromium resources, etc. Grain refinement, energy saving, good mechanical properties

A technology for mines and grinding balls, applied in the field of special grinding balls for mines, can solve the problems of low production efficiency of alloy steel rolling wear-resistant microspheres, high chromium and manganese content in high-chromium balls, and consumption of national chromium resources, etc. Grain refinement, energy saving, good mechanical properties

CN101864533AInactive Publication Date: 2010-10-20宁国市南洋机械有限公司
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Experimental program
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Embodiment Construction

[0031] a) Prepare scrap steel and ferrochromium according to the set chemical composition percentage (C: 1.0-2.7, Cr: 5.0-11.5, Si: 0.3-0.9, Mn: 0.4-0.8, W≤0.8, S≤0.09 , P≤0.09, the matrix is ​​iron) for batching, and put it into an intermediate frequency electric furnace for smelting. After the furnace charge is completely melted, do the furnace analysis, and then carry out quenching and tempering.

[0032] b) The composition of the molten iron is up to standard and reaches the pouring temperature specified in the process.

[0033] c) Put it in a large ladle and transport it to the pouring site, and the pourer will use a small ladle to transfer the pouring.

[0034] d) 3. The large ladle must be dried before accepting the molten iron, and the prepared yttrium-based heavy rare earth copper modifier is placed on the bottom of the large ladle and covered with a thin iron plate, then poured into the molten iron and stirred with an iron braze to make the yttrium Basis weight rare...

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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...

Claims

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Application Information

Patent Timeline
20 Oct 2010
Publication
CN101864533A
IPC
C22C37/06; C22C37/10; C22C33/04; C22C33/08; C22C38/18; C22C38/36
Inventors
周元行; 明章林