| 摘要 |
<p>A method for extracting silica from rice husk ashes produced from burning rice husks is based on controlled combustion of rice husks to produce ashes, the silica having structural shapes that vary depending on the type of equipment used for burning, and also on the combustion time and temperature that produced rice husk ash, and comprising up to 95% dioxide, and having an amorphous structure when burned at temperature ranges from 400 to 800°C for two to eight hours. The silica is then micronised and used as raw material for producing thermoformed parts by injection moulding, so as to supply the market for automobile parts, toys and frames for electric household appliances. The recycling of rice husks helps protect the environment, replaces some of the sand extracted from nature, and can help promote rice cultivation.</p> |
