Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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THE CLEANING OF IRON ORE FROM IMPURITIES OF CALCIUM AND MAGNESIUM

Stas N.F. 1
1 National Research Tomsk Polytechnic University
The kinetics of leaching calcium and magnesium from the natural magnetite ore of Olenogorsk’s land deposit (Russia) by azotic acid was studied. Every experience practice makes for 3 hours with bath analyses in 10, 20, 30, 60, 120 and 180 minutes. The experience practices at temperatures 20, 40, 60 and 80 °С were made. The impact of acid mass content in the range from 1 to 30% at a comfort temperature 60С was studied. The experience practices in a different relationship between the solution mass and the acid mass from 3:1 to 20:1 for the acid solution of 10 % at 60 °С were made. It was found that leaching is a self-stopping process with the activation energy of 12 kJ / mol. The cleanability from calcium on 66 % at a single treatment, and on 94% at a double treatment of ore with the provisional bucking and disrupting of eliminate bench entities which causes stopping process was showed. The experience practices of using ferric nitrate (III), in solution of which the azotic acid is formed because of hydrolysis behavior was made. The leaching of calcium this sal is only 10% was showed. Therefore the sal using for the leaching impurities is not recommended.