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Aobei Ductile Iron Ball adopts inexpensive multi-element alloys based on Mn and Si alloy elements in line with China's national conditions , as well as intensified gestation and metamorphic processing technologies, and innovative use of isothermal continuous cooling quenching + residual heat isothermal tempering process. The contrast with other steel balls is as follows:
In order to solve the problem of stability and consistency of product quality in large-scale production. A series of tooling equipment such as smelting, forming and pouring, and heat treatment of steel balls need to be comprehensively upgraded and remodeled. Casting adopts the iron type sand-covered mechanized casting ball production line, and the heat treatment equipments are all changed to full-automatically controlled continuous heating furnace quenching production lines and isothermal oven tempering production lines. The testing center introduced the German hyperspectral Q6 vacuum spectrometer, high-power metallurgical microscope, high-frequency infrared carbon-sulfur analyzer, and impact toughness testing machine. Rockwell hardness tester, falling ball tester and other cutting-edge testing equipment not only greatly increase labor productivity, but also improve the labor intensity and environmental conditions of operators, and the quality and quality of cast ball have been significantly improved and stabilized. Solve the problem of stability and operability of the final product quality in large-scale production.
High-chromium steel ball oil quenching process hardness of up to 58-62HRC, not only wear and toughness is very good. The traditional process steel ball is wind quenching, it has certain limitations, wind quenching can not achieve the chill effect, and the windward surface and the leeward surface temperature is not the same, resulting in the steel ball is easily deformed during use. The hardness of the castings at the casting end of traditional craft products is lower than the hardness of other places by about 2 hardness. In the process of casting, the riser is easy to sink into an apple shape, which affects the grinding effect and the stability of the grinding grading system. This is a tradition. The inability to overcome the disadvantages of the process.
Comparing the high chromium ball with the ADI ball, a 3.2 × 3.6m lattice type ball mill was used for the comparison. The high chromium cast ball was originally used. The amount of time was 39-40 tons . The ball consumption of the ore was 1kg and the working current was 67-. 68A , high ball consumption and high breakage rate, high round-off rate. Use my factory Aobei ball, the situation is as follows:
1. Crushing rate: The grinding ball in the mill is not broken or cracked, and the broken ball rate is almost zero.
2. Ball consumption: 39,967 tons of raw ore processing, 22.22 tons of steel balls consumed, and 0.77kg/T of ball mill balls .
3. The amount of time: 44-45 tons.
4. Operating current: 50-60A.
5. Noise: Mill noise is reduced by 5 dB.
From the experimental comparison data, it can be seen that the Aubell body nodular cast iron ball is more cost-effective than the high-chromium cast ball in the mine wet grinding, especially in the process of the surface hardness will continue to increase, the surface hardness reaches 60-63HRC. Because ADI undergoes plastic deformation under stress , austenite undergoes phase transformation and transforms into martensite and significantly strengthens. It can be foreseen that this material can be widely used in the field of wear-resistant materials in the future, especially in the beneficiation industry, with the expansion of scale, the diameter of the mill is also getting larger and larger, such as Angang Gangjun Taiwan Plant, Dexing Copper Mine, Tongling Copper mines and mills all have a diameter of more than 5M . Large-size grinding balls used in large-diameter mills , such as high-chromium and low-chromium balls, are not suitable for such mining conditions. Priority can be given to steel balls made of Aubell material. Because the toughness of this type of material is much higher than that of chromium-based white cast iron, it is not easy to crush, and it is particularly suitable for the use of mine wet grinding conditions. This is the future in the mine to replace the chrome cast ball products, the Aube grinding ball opened a new era of China's wear-resistant materials industry, high efficiency, energy saving, reducing consumption.
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