How Graphite Blocks Become Carbon Additives

The crushing of graphite blocks is an indispensable process in the production of graphite products. We refer to the process of reducing large graphite blocks to smaller sizes as crushing, which typically involves applying mechanical force to overcome the intermolecular cohesive forces within the material to break it apart. Subsequently, based on the size of the crushed particles and their granularity, they can be categorized into coarse crushing, medium crushing, fine crushing, coarse grinding, and fine grinding, among others. However, there is no strict demarcation between these categories, and different industries have varying standards for crushing.
Today, we'll discuss the three crushing grades in the graphite products industry, which can be categorized as preliminary crushing, medium crushing, and fine grinding. Let's start with preliminary crushing, which refers to the crushing of large graphite blocks before they enter the calcining furnace. Typically, this involves breaking down graphite blocks of about 200 millimeters in size to around 50-70 millimeters. Medium crushing, on the other hand, involves further breaking down the particle size after calcination, where graphite blocks of about 50 millimeters are crushed to 1-20 millimeters.

Let's delve into the fine grinding process, which involves reducing certain raw materials into powder finer than 0.15 or 0.075 millimeters. Each time the graphite blocks are crushed, the particle size decreases to a certain extent. Before the crushing, the ratio of the diameter of the large pieces to the diameter of the crushed material is what we refer to as the crushing ratio.