Gravity flotation combined process, containing niobium, rare earth metal ore magneticseparation

China's Steel Corp of Fujian mineral processing plant of Baiyunebo iron ore supply by. The iron ore deposit is a large sedimentary metamorphic hydrothermal metasomatic type of niobium and rare earth polymetallic ore deposits. The ore contains 71 kinds of elements, such as iron, niobium, rare earth, thorium, titanium, barium, manganese, fluorine and phosphorus. The first iron ore mineral is hematite, magnetite, martite and a small amount of pyrite, limonite and siderite. The rare earth mineral primary monazite and bastnaesite, phosphorus ore, lanthanum praseodymium synchysite etc.. As the primary niobium mineral columbite, yellow stone, priorite, fersmite, rutile titanium iron etc.. The primary mineral fluorite, gangue as sodium pyroxene and albite, calcite, dolomite, quartz, sodium amphibole, chalcedony, mica, the primary characteristics of the iron ore is a mess, many elements, summed up the use of high value; mineral varieties, occurrence of rare earth elements gathered mineral; fine particle size distribution, uniform distribution. Refractory ore.

The plant selection as shown in the figure - flotation combined with magnetic beneficiation process, grinding ore by weak magnetic separator choose strong magnetic iron mineral flotation, then select level for the rare earth foam 15% dominant, with strong magnetic separator selected weak magnetic iron minerals, combined with strong magnetic iron minerals iron concentrate. The rare earth foam with tabling don't get rough concentrate, middlings and tailings, ore and ore flotation in continue sorting, using ammonium ring hydroxamic acid as collector, with a roughing flotation, concentrate can be obtained more than 60% levels of rare earth. If you want to improve the level of concentrate, can continue to pick, after five times, you can get the level of 68% (REO) above the rare earth concentrate. Table after roughing and cleaning, can get the level 30% (REO) of rare earth concentrate disposal.