As an iron powder manufacturer, Sagwell has found that since ultrafine Metal Powders have been widely used in the diamond tool industry, their excellent performance has been recognized by numerous professional manufacturers. However, a subsequent issue is that the mixing uniformity of such ultrafine powders in application has always been a technical challenge hindering the consistency of diamond tool product quality. Some people mistakenly equate granulation with mixing, but they are actually two distinct processes.
Granulation is a preliminary step for compression molding. The finer the particle size of metal powder, the higher its surface activity and the more gas it adsorbs, resulting in lower bulk density. When compacting fine powders, it is inevitable that more gas will be trapped. The finer the powder, the slower its falling speed. Without granulation, powder molding will face problems such as poor fluidity, uneven pressure distribution, increased friction coefficient between molds, and weak green compact strength. All Iron powders produced by Sagwell are ultrafine, so these issues need to be noted during application. Below, Sagwell briefly introduces three of the most commonly used granulation methods.
- The first is the rotary granulation system, which consists of a rotating inclined disk-shaped container with an inclination angle of approximately 30° ~ 60°. Powder raw materials and binders are continuously fed onto the disk for agglomeration granulation. Particles are formed by rolling and stacking. Generally, increasing the rotation speed or inclination angle of the disk reduces the granule size, while a deeper disk increases the granule size.
- The second is the agitation granulation system. A common practice is to fully mix raw materials with binders (adding water or solvents), perform the first drying process, then sieve—with the sieve mesh determining the approximate particle range—followed by a second drying process.
- The third is the spray granulation system. Spray granulation equipment integrates various processes such as mixing, stirring, granulation, drying, and crushing from other granulation procedures into one device. It mainly has two types: spray nozzle and centrifugal turntable.
Sagwell has been actively developing and researching ways to better achieve granulation on ultrafine iron powder. During the mixing process, it can effectively reduce powder segregation and diamond particle agglomeration. After granulation, the material distribution becomes more uniform. In the first phase of granulation-related R&D, Sagwell, the iron powder manufacturer, offers granulated iron powders ZB (3000 mesh) and ZF (5000 mesh). These products have been maturely applied in multiple industries, mainly diamond tools, and have received positive feedback from customers.
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Email: sales@sagwell.com
