Experimental Study on Beneficiation of a Magma Assimilation Contamination Type Flake Graphite Ore
The ore properties and grinding-flotation conditions test,open circuit process test and closed circuit process test were carried out aiming at a magma assimilation contamination type flake graphite ore.The results showed that the ore be-longs to granite-type ore,the graphite is medium fine flake structure,and the fixed carbon content is 5.40％.The main minerals in the ore include graphite,quartz,feldspar,biotite and pyrite,among which graphite is the mineral for recovery.The sheet di-ameter of graphite is mainly 0.037～0.178 mm,of which+0.15 mm flake graphite accounts for 12.32％,and the scale protec-tion is of little significance.The raw ore was roughed once,the fineness of roughed was 54％,the amount of roughed kerosene was 60 g/t,the amount of No.2 oil was 48 g/t,and the rough concentrate was reground nine times and cleaned 10 times.The high carbon graphite concentrate products with yield of 5.52％,the fixed carbon grade of 94.52％,and the recovery rate of 96.67％was obtained finally.In the concentrate,-0.045 mm grade products account for 36.09％,and the product slice diame-ter is small,which can be used to prepare deep processing products such as spherical graphite.Purified graphite with fixed car-bon content of 99.58％could be obtained by chemical purification using flotation concentrate by acid leaching and alkali melt-ing.
magma assimilation contamination typescale fibre graphitemultiple selectionflotationchemical purifica-tion
万方数据
维普
