Silica Produced From Rice HuskAsh. Rice Husk Ash Silica Manufacture. Emerging Investment Opportunities inagriculture waste processing Industry
Silicaoccurs as amorphous to crystalline form in many types of igneous, metamorphic,and sedimentary rocks, but in sediments and sedimentary rocks much of thesilica is detrital material. The chief forms of silica are hydrous opal,cryptocrystalline chalcedony, and crystalline quartz.
As a byproduct of thecombustion of rice husk to generate energy, rice husk ash (RHA) is formed bysilica and carbon, apart from small amounts of other constituents. Severaltreatments can be used to increase the purity of the silica obtained, or evenproduce pure silica. Rice Husk Ash. Rice husk ash (RHA) is a highly reactivepozzolan obtained when rice husks are calcinated below the crystallizationtemperature at 780°C (Yu et al 1999).