Leaching Procedure of The Experiment
【China Molybdenum Industry News Network】
Leaching Procedure
The experimental set up for the leaching process was made of Pyrex because of sudden temperature changes with sulfuric acid. A reflux condenser was employed to prevent a change in the density due to water evaporation during the reaction process (temperature is more than 45 ºC). A thermocouple measured the temperature of the reaction water and maintained the temperature of the reaction water ±3 ºC inside and outside of the reaction apparatus.
After reaching the optimum temperature condition the molybdenum oxide ore sample was added to the sulphuric acid solution. A cross-shaped magnetic stirring bar was used for proper mixing of the sample with acid solution. Analysis of the metals such as copper, iron and zinc was recorded by ICP-OES and the leach rate was calculated.
Finally, molybdenum oxide with improved content was obtained by a washing and drying process after the leaching process and copper impurities were removed from the sample as confirmed by XRD analysis. The general agreement between the percent leaching obtained was within ± 2 to 3%.
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