Products Description
The grinding steel ball includes the steel ball, steel cylpeb and special-shaped grinding balls, and each kind of steel ball and steel segment has different application scenarios and functions.
the specification and size of steel cylpebs
In the past small diameter short mill, there is basically no pre-grinding outside the mill, the particle size of the grinding material (F80) is generally 20~25mm, and the particle size of the material entering the second warehouse is mostly between 0.5~1.5mm, so the steel section is generally selected to work 20×25mm, work 25×30mm. With the progress of grinding technology in recent years, the grinding is equipped with a powerful pre-grinding system, the particle size of the grinding material is mostly reduced to below 2mm, and the size of the fine grinding bin is generally only 0.2~0.3mm, at this time, the use of miniature steel segments is really like fish in water. According to our experience, the best grinding efficiency is achieved when the equivalent diameter grinding body with a cone of about 10m is used to grind 0.2~0.3mm material to 20~30μm clinker under conventional gravity acceleration, and the clinker with the particle segment of 20~30μm is the particle with the best performance indicators. This is also the main technical support of high performance cement.
different types of grinding cylpebs between cement and mining industry
The grinding balls and cylpebs used by the cement industry and the mining industry are basically the same, but the size specifications are different. It is normal to use a 120mm or even 140mm balls in a beneficiation mill. The steel segment is also 40×50mm or even 50×60mm, and the micro-segment currently used by cement mills is unheard of.
From it, we can see that the weight of the micro-segment (14×14mm below) is only a few grams, whether from the use of loss, or the manufacturing technology of wear-resistant materials enterprises, which is a certain challenge.
First of all, from the user's point of view, when the micro-segment is used under conventional mill working conditions, it is almost no longer effective when it is less than 4mm. Therefore, if the wear resistance of the material is insufficient, the reserve wear amount of only a few millimeters of the micro-segment will soon be worn and lose its effectiveness, which not only increases the cost of wear, but also affects the grinding efficiency of the mill to a certain extent. Secondly, from the perspective of wear-resistant material manufacturing enterprises, high-quality micro-segment production has also been a headache, this small size abrasive body due to impact toughness hardenability is not a problem, so as far as possible to improve the content of C and Cr content, such as the content of Cr 18%, the content of C increased to about 3.3%, However, it should be noted that the eutectic point is different with the content of Cr and other alloying elements, and the high hypoeutectic carbon content should be used as much as possible, but the eutectic and hypereutectic technology still needs to be practiced. Currently being explored technologies such as semi-solid technology and super modifier technology once industrial application, it will greatly improve wear resistance under the premise of unchanged production costs, which is undoubtedly a boon for cement companies.