Multiple-purpose Applications of Rice Husk Ash
Rice husks can be used as fuel for the boilers to produce power or for further processing at a rice plantation.
Rice Husk Ash (RHA) is used in the cement industries. It bonds well with cement, and it reduces the amount of cement content required. RHA-mixed concrete products are ecologically sound and sturdy. It can be used as a replacement up to 20% of the cement in concrete. It is a valid economic solution. It strengthens concrete and minimizes corrosion by decreasing its permeability.
RHA is an excellent insulation medium. It is exclusively used for insulation lining of the molten metal in tundish and in slab casters. The molten metal temperature in the ladle is 1400 C and its temperature drops to 1250 C. In order to prevent breakdown of the slab caster, RHA is coated over the tundish and the ladle as an insulator.
The packaging industry uses RHA-generated silica. It has an anti-blocking property which solves the problem of bonding low density polyethylene films. This is because RHA silica has smaller particle size and higher specific surface area.
Precipitated RHA Silica has special physical and chemical properties. It blends firmly in vulcanized rubber formulation enhancing tensile and tear strength with an increase in hardness and abrasion resistance. (There must not be any confusion between RHA-generated silica and silica extracted from sand.)
RHA silica is widely used in tire and shoe industries. Precipitated silica serves as filler for paper industry. It is a cleansing agent used in toothpastes and cosmetics.
Our body uses natural silica for maintaining and promoting good health. A shortage of natural silica causes acute health problems. The best remedy is to eat steam cooked Bamboo shoots. It has 95% natural silica. Health recovery is very fast. Silica is used for health care applications. Bamboo silica prevents premature aging.
Ground rice husks impregnated with silver iodine nano particles serves as a safe drinking water filter. The Tata Swach Magic water filter is a new cost-effective innovation, and it runs without electrical power.