MICROWAVE OVEN DRYING METHOD OF SAMPLES OF GOLD-BEARING ORES Russian patent published in 2013 - IPC G01N1/44 C22B11/00 

FIELD: heating.

SUBSTANCE: method involves setting of a standard value of moisture weight fraction in a dried sample, heating and cooling of the heated sample in the air. With that, sample heating is performed at the temperature of 30 to 135°C in a microwave oven. Before the sample is heated, weight fraction of moisture in the sample is measured, and heating is performed at the duration calculated as per the following formula: 5≤τ=K·m(W₁-W₂)/P (1), where: τ - duration of a sample heating operation, minutes; K - proportionality factor depending on physical and chemical ore properties and the oven type, is determined with an experiment for each ore type; m - geological sample weight, kg; W₁ - moisture weight fraction of the initial sample, %; W₂ - standard value of moisture weight fraction of the dried sample, %; W₂<1.5%; P - microwave oven power, W.

EFFECT: reduction of electric energy consumption for sample drying; increase of a drying process speed and improvement of working conditions.

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