Beneficiation of Hematite Ore by High Intensity Magnetic Separation and Selective Flocculation
Selective flocculation of iron minerals could improve the economics of high intensity magnetic separation as concomitant process. When the minerals are finely disseminated is necessary a finer grinding to be applied which generates a lot of slimes. The HIMS is not enough efficient for particles below 20 microns-territory where the selective flocculation is already well known industrial practice, so the combination of these two methods of beneficiation can bring a higher grade at high recovery to be achieved. The dynamics and selectivity of the precipitation process is studied in batch tests with flocculant starch and dispersants sodium silicate and sodium hexametaphosphate. The influence of preliminary conditioning with nitrogen acid at pH 2 before flocculation is also investigated. Flowsheet including these two methods is tested and the distribution of iron is shown.
Selective flocculation Magnetic separation Iron minerals
Kr. J. Dedelyanova K. Ionkov
Scientific and technical union of mining, geology and metallurgy Sofia, Bulgaria Kremikovtzi-Mining Ltd., Sofia, Bulgaria
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1121-1125
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）