Grinding balls are also called high-chromium alloy cast balls and high-chromium steel balls, which are simply called high-chromium balls. At present, most of the domestic wear-resistant materials enterprises are mainly medium-frequency electric furnaces, which are smelted by reasonably matching high-quality scrap steel and chrome alloy materials; and micro-alloying and quenching of molten iron; The sand mold casting process; and then the high temperature quenching + tempering treatment to obtain a martensite matrix to achieve higher hardness and wear resistance.
At present, most of the grinding media used in China's cement industry are mainly high-chromium balls. With the continuous development of the cement grinding process, the specific surface area and fineness requirements of the cement are more and more favorable, which is particularly important for the cement industry to correctly select the grinding body.
High-chromium alloy casting balls are widely used in powder preparation and ultra-fine deep processing in cement building materials, metal mines, coal slurry thermal power, chemical engineering, ceramic coatings, light industrial papermaking, magnetic materials and other industries. The product has high hardness, low abrasion, good toughness and less breakage. During the use process, the hardness of the surface of the sphere will be further improved, the wear resistance will be enhanced, and the grinding machine production capacity can be improved, and the specific surface area of the cement and the recovery rate of the concentrate can be improved.
Abrasive body with high wear resistance keeps the grading constant for a long time, not only improves the grinding efficiency, reduces the time for stopping the ball and the number of starts and stops, but also prolongs the clearance period, reduces the labor intensity of workers, and simultaneously improves the grinding machine. It is of great significance to produce at the time of the stage, to ensure the quality of the abrasive and to reduce the power consumption and the consumption of the grinding body. For example, Anhui Ningguo Chengxin Wear-resistant Material Co., Ltd. combines different industries and working conditions to develop chromium-based alloy cast ball products, in which the high-chromium ball forging hardness of cement grinding reaches above 62HRC (impact value ≥4.0J/cm2). In China, a number of large cement companies φ4.2*13m cement mills use only ton of cement per ton of single-pillar consumption of only 13 grams, which is more than five times higher than the wear-resistant chrome balls, creating a value for cement companies. Economic benefits. It can be described as a real environmentally friendly grinding ball and a green grinding ball.