How to identify ultrafine fly ash?

Fly ash mainly contains silica, alumina, and iron oxide, and has been widely used in the production of cement and various lightweight building materials. In addition, fly ash can also be used as floating beads and as fertilizer and trace compound fertilizer. In industry, various substances such as carbon, copper, iron, germanium, and scandium can be recovered from fly ash. At present, many illegal manufacturers add plant ash to fly ash, resulting in a decrease in the quality of fly ash. Learning to distinguish ultrafine fly ash has become very important.

Moreover, fly ash has improved fluidity, and the performance of industrial slag ultrafine powder and fly ash ultrafine powder mainly focuses on two aspects: raw material selection and fineness. The main chemical components of fly ash are silicon dioxide, aluminum oxide, and iron oxide, while high calcium ash contains more calcium oxide. Reduce the water consumption of concrete and improve its workability; Slag is the water quenched waste residue discharged from an ironmaking blast furnace, whose main chemical components are silicon dioxide, alumina, and calcium oxide, which are similar in composition to cement. Ultra fine grinding to an average particle size of less than 5 μ M and less than 10 μ M can effectively improve its hydration activity.

Although silica fume is suitable for preparing high-performance concrete, its high price and low production cannot meet the requirements of large-scale preparation of high-performance concrete. The main raw materials for ultrafine grinding are slag and fly ash, which have abundant resources and are widely used in production.