What are the uses of fly ash?

Fly ash mainly contains silica, alumina and iron oxide. , has been widely used in the manufacture of cement and various lightweight building materials. In addition, fly ash can also be used as floating beads, fertilizers and trace compound fertilizers. In industry, iron, carbon, copper, germanium and scandium can be recovered from fly ash. The density is 1.5g/cm3.

Generation principle of fly ash;

Fly ash is formed by the combustion and cooling of pulverized coal at high temperature. Most of them are spherical with smooth surface and small pores. Some particles are combined particles with rough surface and honeycomb edges due to adhesion during melting. Generally speaking, it refers to any solid particles in the flue gas produced by fuel combustion, sometimes including particles suspended in the air during cement production.

Its chemical composition changes greatly, which is related to fuel types, combustion conditions and ash collection methods. For example, fly ash from coal-fired power plants.

In addition to unburned coal particles, it also contains a large number of oxides of silicon, iron, aluminum, calcium, magnesium, sodium, potassium and sulfur and various trace elements. Fly ash is very harmful to air pollution, so measures such as dust removal device must be taken to remove it. It can be used as adsorbent or filter aid for sewage treatment.