Study On The Separation Test Of Anshan Type Magnetite By The Magnetic Flotation Column

China is rich in iron ore resources. Total amount of iron resources ranks the thirdin the world, and reserves of identified resources lists the fifth in the world. There arefew high-grade ore resources and many low-grade ore resources. Almost all the oreneed mineral processing to meet the ironmaking production requirements. Anshantype magnetite is one of the important iron ore resources in China. The ore resourcesare broadly distributed and huge reserves with low grade of iron and fine particle sizedistribution.The industrial type of Tianye concentrator selecting ore is Anshan type magnetitein Lanxian, Shanxi province. The grade of total iron in the raw ore is27.89%withlow phosphorus and low sulfur. Metallic minerals are mainly magnetite, and gangueminerals are mainly quartz and cummingtonite etc. in the flotation feed. Restrictingproductive life, Tianye concentrator plans to build new factory and workshop. It plansto ues new equipment and new technologies to reduce production costs and to achievethe goal of reducing cost and increasing efficiency.The paper chooses flotation feed of Tianye concentrator for the study. Fistmulti-elements analysis and particle size characteristic analysis etc. were carried outon flotation feed. Then exploration and research on process conditions wereconducted using flotation machine in the laboratory, combining with the currentseparation situation of Anshan type magnetite. And closed circuit tests of flotationmachine were also carried on. Based on tests of flotation machine in the laboratory,separating tests of magnetic flotation column were made in the laboratory. Finallyconsidered the production at the scene, industrial tests were carried out to checkseparation performance of magnetic flotation column.Experimental study in laboratory mainly included process mineralogy, tests offlotation machine and tests of magnetic flotation column. Based on the effect ofreagent system, pulp conditions and device parameters on flotation, closed circuittests were carried out. The tests show: on condition that average grade of flotationfeed was55.59%, the grade of concentrate was65.75%and recovery rate ofconcentrate was92.15%with one roughing–three scavengings–one concentrating byflotation machine; and the grade of concentrate was66.12%and recovery rate ofconcentrate was91.50%with one roughing–one concentrating by magnetic flotationcolumn. After the research on flotation process in laboratory and tests of magneticflotation column, industrial tests of magnetic flotation column were carried out andthe process was optimized. The influence of pulp conditions and device parameters onthe flotation index were researched and84-hours’ continuous tests were also carriedon. The tests show: on condition that average grade of flotation feed was55.59%, thegrade of concentrate was65.71%, and recovery rate of concentrate was91.83%, andtailing grade was20.36%with one roughing by magnetic flotation column. At thesame time the grade of concentrate was65.35%, and recovery rate of concentrate was91.63%, and tailing grade was21.10%with one roughing–three scavengings–oneconcentrating by flotation machine. The continuous tests show, efficient separation ofAnshan type magnetite in Lanxian by cyclonic-static micro-bubble magnetic flotationcolumn could come true.