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Experimental Study of a fine grade hematite strong magnetic centrifugal process

Author: WuJinLong
Tutor: XiongDaHe
School: Jiangxi University of Technology
Course: Mineral Processing Engineering
Keywords: Micro - fine-grained hematite High gradient Pulsation Centrifugal concentrator Finely ground re-election
CLC: TD951
Type: Master's thesis
Year: 2011
Downloads: 53
Quote: 1
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Abstract


Hainan Shilu the Beishan poor iron ore are than micrograined Khenpo Anshan hematite the ore mainly useful iron mineral dissemination size of 20 microns to 37 microns , and other effects of ore grinding fineness and high intensity magnetic separation the test results show that the need magnetic selected grinding fineness -200 mesh (0.074mm) accounted for more than 90% , and a selection of centrifugal concentrator tailings regrinding the needs of re - election when the grinding fineness - 325 mesh (0.045mm) accounted for more than 80% , and the operating process of grinding mill minerals obviously coarse and fine polarization characteristics . Papers Hainan Shilu private enterprises Everbright mining raw ore dressing process transformation project for the subject , and to develop small laboratory process to explore the test of the Shilu Kitayama poor iron ore beneficiation methods using high intensity magnetic separation and centrifugal separation joint . Small Discover the test results show that : the grinding fineness sufficient conditions , an average of 40.37% Fe grade ore after magnetic even elect tailing and magnetic the rough concentrate centrifugal selected \able to obtain the iron grade of 62.98% and 75.65% of the total iron recovery eventually iron concentrate . The centrifuge product water analysis results also show that : Slon is centrifuge the grain size of 0.01mm fractions recoveries are 75.53% , 45.43% -0.01mm size fraction recoveries , effective recovery of micro- fine red iron ore. Analysis showed that the mechanism of the magnetic separator beneficiation : mineral particle size of the force of the magnetic field suffered with than the susceptibility of the mineral itself , but also related to the external magnetic field strength and the magnetic field gradient ; Slon is cycle pulsating high gradient INTENSITY MAGNETIC SEPARATOR stainless steel guide bar magnet of the special arrangement of the selected cavity placement can significantly improve the dielectric around the magnetic field gradient ; the flow forces of the pulsating flow of the mineral particles, the group is in a loose state, and mechanical entrainment of non-magnetic mineral particles can be effectively reduced , significantly improving magnetic the taste of the product . Analysis showed that the the beneficiation mechanism of centrifuge : the group of mineral particles in the centrifugal force field is stratified according to the proportion of separation , the centrifugal force field just enlarge the sedimentation rate of mineral particles , so fine heavy mineral particles can get enough settling terminal velocity recovery ; Slon is centrifuge maximum centrifugal force of up to 110G.

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CLC: > Industrial Technology > Mining Engineering > Beneficiation > Metallic Ore Dressing > Black Metallic Ore Dressing
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