Microwave technology in the metallurgical and mineral industries
    Metallurgical industry is a traditional industry , a variety of smelting technology matures, but the drying process minerals there are more problems : labor-intensive , labor- poor environment ; drying time is long , high energy consumption ; environmental pollution ; huge drying device , high investment costs , low productivity , etc., will be applied to mineral microwave drying technology can basically solve the above problem . Microwave technology for the production of vanadium-nitrogen , silicon nitride and other alloys, with significant energy savings ( 60% compared to traditional craft ~ 80% ) , solar ( 50% for the traditional process ) . In addition , microwave technology is also used in the metallurgical industry : strengthening dissolution , the restore process ; hydrometallurgy solution , sample drying, concentration and enhanced leaching , recycling scrap metal and so on.
    With the emphasis on the microwave field dressing , microwave engineering application in the dressing also gradually showing superiority and practicality. Compared with conventional heating methods , microwave heating can save half power ore . In grinding , according to the selectivity of the microwave heating characteristics can before grinding the ore pretreatment to reduce the energy consumption of the grinding process . In flotation , the use of microwave heating to improve the adsorption properties of flotation reagents , improve mineral recovery , flotation reagent greatly reduced. In the dressing , the use of microwave technology can be non-magnetic minerals into a magnetic minerals , which can make use of the method of magnetic beneficiation . Most metallic minerals in nature are all present in the form of sulfides , metal extraction processing method is mainly fire roasting + leaching process . But fire roasting inevitably produce sulfur dioxide , causing environmental pollution, Microwave reduction rate than conventional much higher reduction rate , the use of microwave heating leaching can be a good solution to this problem. Microwave technology in addition to the above applications, the mineral roasting, sample tests, etc. also has applications .