Products Description
Introduction
Grinding casting mill ball for ball mill are undoubtedly the world's grinding industry at present, and even the foreseeable future of the first major wear-resistant material consumption. According to the data, in 2020, only one industry in China's mineral processing consumed about 5 million tons of steel balls of various materials.
A grinding steel ball is round. The shavings are melted and turned into molten iron at a certain temperature, which is then cast in a mold to form a steel ball. Modern technology has created new achievements in recent years, and automated production has been realized. We believe that generations of steel ball people will continue to struggle for this. Because this is a kind of fun, only when you walk into the vast world of steel balls, you will feel that it is not a blunt iron block, it is also spiritual, the embodiment of beauty. You imagine: a round steel ball free in the ball mill inside, in constant operation, resulting in the large ore to be crushed, contributing to the world, and everything in life is closely connected. How like our human Tiangong 1, 2, in the exploration, in operation.
Why do grinding balls break？
Whether the manufacturer of steel balls or the mine that uses steel balls, it will encounter such a problem that during the operation of the ball mill, the steel balls will be broken, why will they be broken - a fundamental problem is the internal stress.
Simply put, the internal stress is a measure of the degree of deformation, strength, impact toughness and other physical quantities related to the failure of the object; In simple terms, internal stress is internal pressure.
mechanical properties of products
|
Name |
Designation |
HRC |
ak J/cm2 |
Microstructure |
Times of Falling Balls |
|
|
Low Chromium Cast Grinding Ball |
ZQCr2 |
≥45 |
≥2.0 |
P+C |
≥8000 |
|
|
High Chromium Cast Grinding Ball |
ZQCr12 |
58-66 |
≥3.0 |
M+C |
≤Φ80 |
≥15000 |
|
≥Φ80 |
≥10000 |
|||||
Four methods for relieving internal stress
Grinding casting mill balls for ball mills are crucial components used in various industries that require efficient grinding of materials. However, these steel balls have internal stresses that can lead to deformation and failure during usage. To prevent this, four methods can be employed to eliminate internal stresses:
1. Tempering Heating Method: This method involves heating the steel balls in an electric furnace, gas furnace, or oil furnace to a high temperature before quickly cooling them down. This process results in a gradual elimination of internal stresses and improves the overall strength and toughness of the steel balls.
2. Residual Heat Tempering Method: After forging the steel balls, they are left to cool naturally and then placed in a heat preservation environment. This method takes advantage of the residual heat to temper the steel balls and remove internal stresses.
3. Impact Method: The Impact method uses a ball segment separator and a rolling drum to continuously impact the steel balls. This impacts the ball surfaces and removes internal stresses.
4. Natural Failure Method: This process involves leaving the steel balls in their natural state to allow for gradual relaxation of internal stresses over time. This method requires no additional treatment, making it a simple and cost-effective way to eliminate internal stresses.
In conclusion, these methods are vital in eliminating internal stresses from grinding casting mill balls for ball mills. Manufacturers must use the most appropriate method depending on the specifications of the steel balls and the intended use. By utilizing these methods, we can produce high-quality steel balls that can withstand the rigors of various industries without failing due to internal stresses.
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