. Graphite. ts of waterwhich impinge on the surface of the pulp. The pulp is fed unclassified tothe centre of the washer, and the frothing oil is introduced with the waterfrom the jets. This water is under a pressure of about 40 pounds persquare inch. 100 The Alabama graphite field is believed to be the only one in whichthis system of oil flotation has been adopted. Jaw crustier Shak/ng screen. f/2mest)J OversS tt/gtj speed ro//s TnrougAs /^Washer Af/dd/ings2nd Washer Concentrates Ta//mgs 7b /raste Concentrates Ta/t/ngs 3rc/fVasner ConcentratesS/raA/ng screeo/tOO me$t>JOvers Ttiroughs Dryer
. Graphite. ts of waterwhich impinge on the surface of the pulp. The pulp is fed unclassified tothe centre of the washer, and the frothing oil is introduced with the waterfrom the jets. This water is under a pressure of about 40 pounds persquare inch. 100 The Alabama graphite field is believed to be the only one in whichthis system of oil flotation has been adopted. Jaw crustier Shak/ng screen. f/2mest)J OversS tt/gtj speed ro//s TnrougAs /^Washer Af/dd/ings2nd Washer Concentrates Ta//mgs 7b /raste Concentrates Ta/t/ngs 3rc/fVasner ConcentratesS/raA/ng screeo/tOO me$t>JOvers Ttiroughs Dryer T fin/sti/ng m/7/ Fig. 31. Flow sheet showing Simplex oil notation system, as installed in an Alabama graphite mill. Figs. 31 and 32 show a flow sheet of a Simplex installation and a sectionthrough a Simplex washer, respectively. While data relating to resultsachieved, costs, etc., are lacking, the system is reported to have effected asatisfactory concentration. FROTHING WATER PLUS OILNOZZLES, /4 OPENINGS. SCREEN BAFFL TAILINGS SPIGOT TAILINGS SPIGOT FEED WATER Fig. 32. Section through Simplex washer: not drawn to scale. Washer is elliptical, andmeasures about 6 feet by 3^ feet. (United States Bureau of Mines.) K. and K. System. In 1918, one mill in Pennsylvania was planning the installation of thissystem of oil flotation, but the writer lacks further details. 101Surface Tension or Film Flotation. This system of concentration depends on the ability of flat, flakymineral particles to float on the surface of water by surface tension, withoutthe addition of oil. This method of concentration has been employed in alarge number of Alabama mills and is, in fact, practically confined to themills of this State at the present time, though attempts at concentrationalong similar lines were made in Canadian mills a number of years ago. The process has the merit of being relatively cheap to operate, the millequipment required is not elaborate, and there are few appliances to sufferwear and
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Keywords: ., bookauthorcanadami, bookcentury1900, bookdecade1920, bookyear1920
