Fly Ash is a byproduct of the power generation industry obtained by the mechanical or electrostatic precipitation of powdery material derived from the combustion gases in a boiler fed with pulverized coal. They are made of spherical vitreous particles and may have pozzolanic properties. Fly Ash can be used as an alumina and silica source in the raw mix in the process of cement manufacturing.
Most Bottom Ash results from the burning of pulverized coal in suspension in the modern utility boiler used in coal-fired power plants. The heavier ash particles fall to the bottom of the firebox (bottom ash) and the lighter particles remain in the gas stream, and are usually collected in an electrostatic precipitator (fly ash). The bottom ash is often flushed from the boiler bottom with water, and collected in settling basis, from which it can be recovered. Bottom ash can be used as a source of aluminum, iron oxide, and silica in the manufacture of Portland cement.
Bauxite is a member of the chemical family: Metallic Hydroxide/Oxide. This is a naturally occurring sedimentary rock, non-chemically treated and contains one or more aluminum hy-droxide minerals. The vast majority of all mined bauxite is used for aluminum metal manufacturing. Bauxite is a rich source of aluminum as a raw material in the manufacture of Portland cement.
Kaolin Clay is a natural usually white or tan mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminum silicate minerals like feldspar. It is widely used after calcining as a primary ingredient in the manufacture of China.