Area of industrial application of rice husk ash (husk) production of Portland cement. Also, due to the fact that it is difficult to burn and less likely to allow moisture to spread mold or ash fungi, rice husk is used as an insulating material and belongs to heat-insulating materials of class A
Characteristics of rice husk
- resistant to moisture and fungi;
- decomposes slowly due to the high content of silicon dioxide;
- when burning, the ash content is from 17 to 26%, which is much higher than that of wood (0.2- 2%) and coal (12.2%);
- has a high calorific value - 3410 kcal/kg, so it serves as a renewable energy source.
- in the field of agriculture as a fertilizer and nutrient medium for microorganisms, it is used to increase soil fertility, when planting vegetables and for plant nutrition;
- in metallurgy as a heat-insulating backfill;
- in the fuel industry as a material for achieving high levels of combustion, will reduce emissions into the environment and introduce renewable sources into circulation energy;
- in the chemical industry in the production of dyes, protective coatings, abrasives and lubricants;
- as a filler for car tires - they have excellent grip on wet and dry asphalt, reduce emissions of carbon dioxide into the atmosphere. reduce noise level and fuel consumption;
- in the manufacture of paper, metal ceramics, artificial leather, etc.;
- as a sorbent for cleaning water from oil and oil pollution;
- in the production of heat- and noise-insulating materials;
- in the production of concrete, building materials (blocks, slabs) - has a low cost and is stronger than ordinary artificial building material;
- in agro-industry - the husk, which has been processed by high temperature and pressure, allows to replace the usual soil and is repeatedly used for sowing one cultures;
- in the perfumery, metallurgical, pharmaceutical and electronic industries.
Pure silicon is obtained from rice husks, which is used in modern technologies. This is much cheaper than extracting it from other sources with more expensive processing methods.