The difference between fly ash and cement grinding mill

After years of research, we found that the fly ash and cement grinding system have their own different characteristics and laws in many aspects. First of all, from the point of view of grinding material, cement clinker accounted for more than 70% of the Alite, Baillet is the ionic crystal structure, ionic strength to destroy their grinding; fly ash accounted for 50 ~ 80% are adhered together with glass beads, crushing the material master if interrupted between small spherical glass the adhesion. Secondly, from the product performance requirements, the most important is the cement grinding to improve the early strength effect, specific surface area, particle size distribution of cement have special requirements, and fly ash as admixture of concrete, value is on the workability and durability of the improvement and the enhancement, the water demand of special the requirements of the two requirements, so in the fineness, particle size distribution of the different. Finally, from the point of view of grinding mechanism of fly ash, the bulk crushing grinding only two models and surface grinding, grinding for 45 m fine fly ash (glass beads) plays a very important role, and the cement grinding is different. These characteristics of cement and fly ash grinding, decided that each of them has its rules in the grinding process, grinding media grading, position arrangement etc. Understanding and appropriate use of these rules, in order to achieve high yield, high quality, low consumption.

However, because the powder in China has just started, our understanding of the characteristics and laws are superficial, fly ash tube mill and cement mill is mostly by the change, therefore, the current domestic coal ash tube mill, whether it is inside the mill structure and various technical parameters, and the comparison of cement mill no major changes, lack of targeted. Fly ash cement pipe mill tube mill fully apply the technology in theory is not scientific, the practice may not achieve the desired efficiency. For example, technology application in cement grinding mill screening can achieve good results, but some companies used in the production of fly ash effect is not ideal. This is because the grinding particle size of fly ash in less than 1mm after the first, coarse grinding storehouse, smaller fineness can reach 0.5mm, the sieving device, do not play the screening effect, it will speed up the rate of flow of fly ash, the deterioration of grinding conditions. For example, the fly ash pipe grinding mill the first position of the grindingmedia materials, not only have a strong impact, but also have strong ability of grinding, grinding mechanism of fly ash to adapt, to good effect, apply the ladder of cement mill lining plate, the groove liner or wavelet liner and so on, can not meet the requirements.