Nodular cast iron grinding ball and preparation method thereof

A nodular cast iron and grinding ball technology, applied in the field of nodular cast iron, can solve the problems of low toughness and high hardness

Pending Publication Date: 2022-03-25
宁国东方碾磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the technical problems in the background technology, the present invention proposes a nodular cast iron grinding ball and a preparation method thereof. The grinding ball overcomes the defects of high hardness and low toughness of the nodular cast iron grinding ball in the prior art, and has high toughness at the same time. , and has a certain hardness, and at the same time has high wear resistance

Method used

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  • Nodular cast iron grinding ball and preparation method thereof
  • Nodular cast iron grinding ball and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A nodular cast iron grinding ball, the final chemical composition of the grinding ball includes: C: 3.65%, Si: 2.65%, Mn: 1.72%, Sn: 0.085%, Mg: 0.04%, Re: 0.026%, S : 0.03%, P: 0.04%, and the rest is Fe.

[0037] In order to obtain the above-mentioned nodular cast iron grinding balls, the manufacturing process is as follows:

[0038] (1) Smelting molten iron: Add pig iron, scrap steel, nodular iron return charge, recarburizer, ferromanganese and ferrotin into an intermediate frequency induction furnace for smelting, heat up to 1550°C, smelt to clear, and stand for 10 minutes to obtain molten iron;

[0039] (2) Spheroidization and inoculation: control the temperature of the molten iron at 1520°C, pour the molten iron into the spheroidization ladle, add silicon carbide nanomaterials with a total mass of 0.2% of the molten iron in the spheroidization ladle, and then add a covering agent to isolate the air. The cored wire is used for spheroidization and inoculation treatm...

Embodiment 2-4

[0044] A nodular cast iron grinding ball, its embodiment 2-4 is basically the same as embodiment 1, the difference is that the final chemical composition of the grinding ball is different, as shown in Table 1 below.

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Abstract

The invention provides a nodular cast iron grinding ball and a preparation method thereof. The grinding ball comprises the following chemical components in percentage by mass: 3.6%-3.7% of C, 2.5%-2.8% of Si, 1.6%-1.8% of Mn, 0.07%-0.1% of Sn, 0.03%-0.05% of Mg, 0.02%-0.03% of Re, less than or equal to 0.06% of S, less than or equal to 0.1% of P and the balance of Fe. According to the spheroidal graphite cast iron grinding ball and the preparation method thereof provided by the invention, the grinding ball overcomes the defects of high hardness and low toughness of a spheroidal graphite cast iron grinding ball in the prior art, and has certain hardness and high wear resistance while having high toughness.

Description

technical field [0001] The invention relates to the technical field of nodular cast iron, in particular to a nodular cast iron grinding ball and a preparation method thereof. Background technique [0002] With the continuous increase of the global economic aggregate, the mining industry has developed significantly, and the demand for various ores such as iron and copper has continued to grow, which has expanded the demand for mining machinery and equipment, and at the same time promoted the development of wear-resistant parts. . Ball mill is the equipment for the development of grinding industry. Grinding ball is an indispensable grinding body for ball mill, and its consumption has become the first. [0003] Commonly used grinding balls are mostly made of medium manganese ductile iron or high chromium cast iron. Although medium manganese ductile iron grinding balls are easy to cast and low in production cost, they have low impact toughness and a high breakage rate; high ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C37/10C21C1/10C21D1/20C21D5/00C22C33/10B02C17/20
CPCC22C37/04C22C37/10C22C33/10C21C1/105C21D5/00C21D1/20B02C17/20
Inventor 赵东凯明章林杨霄胡璇
Owner 宁国东方碾磨材料股份有限公司
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