Fly ash is a fine ash that has been collected from the combustion of flue gas, the major solid waste discharged from coal-fired ultrafine mill application. China's thermal ultrafine mill fly ash main oxide composition: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 and so on. Fly ash is one of the most large industrial waste residues in our country. With the development of electric power industry, fly ash emissions from coal-fired ultrafine mills have been increasing year by year. Large amounts of fly ash without treatment, it will produce dust, polluting the atmosphere; if discharged into the water system will cause river silting, and toxic chemicals which will also harm the human body and biological. In addition fly ash can be used as admixture of concrete.
As a new mineral resources, with the fly ash processing equipment and the comprehensive utilization of technology is increasingly mature, such as the use of a flotation a magnetic separation - re-election, a flotation a desliming, flotation a superfine grading joint process , Select a variety of products with economic value from the fly ash is an important direction to solve the pollution of fly ash and make it resourced, and also an effective means to improve the utilization value of fly ash consolidated station, with broad economic benefits. Now a large number of coal-fired ultrafine mills in China discharge of fly ash, the fineness of the value generally varies between 20% to 50% (325 mesh sieve), less than the national standard (GB196-91) provides a level Gray and secondary ash requirements.
Therefore, the superfine grinding fly ash as a comprehensive approach to fly ash a good way, will inevitably be more and more attention. In order to improve the utilization rate of fly ash, Shanghai ZENITH recently developed ultra-fine ultrafine mill, increase the fine warehouse and grinding chamber, so as to ensure that the fly ash in the fine warehouse can be fully crushed and stable and high yield at the same time, as far as possible Adjust the length of the grinding chamber to extend the grinding time of fly ash in the grinding chamber to ensure the fineness of the fly ash grinding. Fully achieve the secondary effect of the ultrafine mill good results.