The flotation process . rflow of froth being controlled bythe main air-valves leading to each unit. After the valves intothe individual wind-boxes beneath the machine have been onceadjusted they should never be disturbed, and all control of airsupplied should be at the valves in the main pipes. When every-thing is going well, the air-pressure in the cleaner can be increaseduntil concentrate-froth is overflowing into the vacuum-filter. Awooden paddle to stir any settled material in the flotation cells isof value, as well as a small jet of water from a rubber hose forwashing concentrate along th
The flotation process . rflow of froth being controlled bythe main air-valves leading to each unit. After the valves intothe individual wind-boxes beneath the machine have been onceadjusted they should never be disturbed, and all control of airsupplied should be at the valves in the main pipes. When every-thing is going well, the air-pressure in the cleaner can be increaseduntil concentrate-froth is overflowing into the vacuum-filter. Awooden paddle to stir any settled material in the flotation cells isof value, as well as a small jet of water from a rubber hose forwashing concentrate along the froth-launders and for beating downfroth when occasional too-violent rushes of froth from the cells takeplace. After a test is complete the pulp should be drained completelyfrom all parts of the machine while the air is still blowing, so that m yafye.*% C/eaner Concentrate Froth-^ To Vacuum_»- Pump. Air L ine, 4 /bs Pressura. Pressure AiuggyTai/ing from Pougher ((^ancf C/eaner Celts- ^^^ Pachouca 7ankW-,^~. Fig. 71. callow test set. solids will not settle in passages or clog the canvas blanket in thecells. Only practice will allow anyone to get reliable results withthis machine. A watch-glass for catching and panning occasionalsamples of froth is another necessary auxiliary to this cost of installing such a set of apparatus is from $100 to $ least 1000 grams of ore is required for a test and about 30 minutesto 1 hour is spent. It can be seen that nothing but a finished concen-trate and a tailing are obtained or a middling product may be left inthe cleaner cell. This middling may be assayed as such and calculatedinto the concentrate and tailing or its sulphides may be panned outand added to the concentrate. The machine is said to give resultsclosely paralleling those obtained with larger-scale apparatus. A TESTING ORES FOR THE FLOTATION PROCESS—II 299 source of supply of compressed air at 3 to 5 lb. per sq. in. is necessaryand the main valves
Size: 2098px × 1191px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidflotationpro, bookyear1916
