Hematite Beneficiation Test in Russia
Михайловск Mining Company is mainly engaged in processing hematite, magnetite, and itabirite mineral. Present mineral processing flow is including four-stages crushing, dry magnetic separation, four-stages ball milling, and five-stages wet low-intensity magnetic separation. According to the provisions of design in mineral processing plant, hematite can be recovered from anionic collector flotation after re-grinding of wet low-intensity magnetic separation. Obtained iron grade of hematite flotation concentrate is 58.4%. However, the designed recycling process of hematite has not been achieved in mineral processing plant, only the magnetic mineral concentrate is manufactured in mineral processing plant, of which the iron recovery is only 57%. Iron grade of mineral processing plant tailings is 26%-28%. Low iron recovery of concentrate determines the high power consumptions of mineral processing plant. Economic and technological pre-calculating result shows that it is reasonable for recovering hematite from tailings of Михайловск Mining Company mineral processing plant.
In order to obtain hematite concentrate from tailings of Михайловск Mining Company mineral processing plant, various mineral processing methods have been tried in the past, such as positive flotation anions, anionic reverse flotation, high-intensity magnetic separation, spiral chute gravity concentration, and centrifugal concentrator gravity concentration. Only hematite concentrate with iron grade of 64.2% can be obtained by roasting magnetic separation, iron grade of hematite concentrate obtained by SB-40 Falcons concentrator is 61.1%, operating recovery rate is 8.0%, iron grade of hematite concentrate obtained by SB-40 Falcons concentrator after regrinding of tailings of mineral processing plant is 63.0%, operating recovery rate is 3.1%.
Source From: Hematite Beneficiation Russia
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