Microwave Energy for Expanding Perlite Ore
Perlite is an igneous mineral composed by silicon, aluminum, oxygen and water. It can be expanded by heating it up at temperatures above 870 °C, then it becomes plastic, and the steam formed inside pressures out of the mineral. Maximum expansion is possible if the particles are heated up quickly, si...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2013 |
| Country: | México |
| Institution: | Universidad Autónoma de Nuevo León |
| Repository: | Redalyc-UANL |
| OAI Identifier: | oai:redalyc.org:47430518003 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=47430518003 |
| Access Level: | Open access |
| Keyword: | Ingeniería perlite heating expansion Microwaves |
| Summary: | Perlite is an igneous mineral composed by silicon, aluminum, oxygen and water. It can be expanded by heating it up at temperatures above 870 °C, then it becomes plastic, and the steam formed inside pressures out of the mineral. Maximum expansion is possible if the particles are heated up quickly, since the expansion degree strongly depends on the remaining water in the particles at the time that they reach the temperature where they become plastic. The typical expansion process consist in pouring the particles in rotary kilns operated with natural gas, but it is proposed in this research that the particles can be heated quickly with microwaves at 2.45 GHz. Particles of 0.08 cm and 0.018 cm of average diameter were expanded 10 to 20 times. |
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