Efficient grinding ball special for environment-friendly mill of cement plant and manufacturing method of efficient grinding ball

Abstract

The invention provides an efficient grinding ball special for an environment-friendly mill of a cement plant and a manufacturing method of the efficient grinding ball and relates to the technical field of wear-resistant material production. The efficient grinding ball is characterized by comprising 1.9% to 3.1% of C, 0.3% to 0.9% of Si, 0.2% to 0.8% of Mn, 11.5% to 13.5% of Cr, not larger than 0.10% of S, not larger than 0.10% of P, 0.5% to 1.5% of Mo, 0.05% to 0.15% of V, 0.1% to 1.0% of Ti, 0.3% to 1.0% of Cu and the balance Fe. The method includes the following steps that firstly, raw materials are smelted at the temperature from 1490 DEG C to 1550 DEG C; secondly, constant-temperature casting is performed at the temperature from 1440 DEG C to 1500 DEG C; and thirdly, thermal treatment is performed, wherein the raw materials are heated at the temperature from 700 DEG C to 720 DEG C for 7 hours to 10 hours, the temperature is increased to 960 DEG C to 990 DEG C, and the raw materials are quenched for 7 minutes to 15 minutes in quenching oil at the temperature from 110 DEG C to 145 DEG C and annealed for 8 hours to 10 hours at the temperature from 330 DEG C to 380 DEG C. The efficient grinding ball is resistant to impact, long in service life and good in abrasion resistance, so that the efficient grinding ball adapts to the severe ball-milling working condition environment, and the HRC ranges from 60 to 65; the impact value is larger than or equal to 6.5 J / cm<2>; the fallen ball impact fatigue service life is larger than 40000 times; and strong corrosion and ultra-high temperature are resisted.

Description

Technical field: [0001] The invention relates to the technical field of wear-resistant material production, in particular to a special high-efficiency grinding ball for environmental protection grinding in cement plants and a preparation method thereof. Background technique: [0002] Casting grinding ball is the grinding body in the ball mill, which is widely used in various industries such as cement building materials, aerated brick building materials, mine dressing, alumina, thermal power plants, etc. [0003] At present, in the existing cement building materials industry, the ball mill is the main equipment in its pulverizing system. With the development of the times, cement raw materials are also constantly evolving towards diversification, energy saving, environmental protection, and high efficiency. Single again. This puts forward higher adaptability and durability requirements for the grinding body of the ball mill. [0004] my country advocates sustainable developm...

AI Technical Summary

Problems solved by technology

3. The polluted soil in the mill contains a large amount of pesticide residues such as DDT and HCH, and its main component is chlorine (Cl) compound, which is highly corrosive

[0008] However, traditional grinding balls cannot adapt well to this harsh grinding environment, resulting in high ball consumption, multiple deformations, and multiple breakages, which have a negative impact on the powder fineness of the ball mill, the desktop output, and the service life of the mill itself. It has a great impact, and frequent addition and replacement of grinding bodies will also increase the labor intensity of ball mill workers virtually.