Asker:	BALVINDER SINGH
Ask Date:	1/8/2008 12:20:42 AM
Question:	Fine Screening
Detail:	WE WANT TO INSTAL A SCREEN MACHINE IN ONE OUR OVERSEAS PROJECT TO SEPARATE DUST/MUD. THE DETAIL OF SCREEN ARE AS UNDER:- 1)MATERIAL TO BE HANDLED :- CRUSHED AGGREGATE 2)CAPACITY :- 70TPH 3)FEEDING EQUIPMENT :- BELT COPNVEYOR 4)TYPE OF SCREEN :- TO SELECT 5)MATERIAL TO BE SCREEN :- BELOW 6MM. OVER SIZE :- (-)75 TO (-)6MM 6) QTY :-4 NOS CAN SOMEONE SUGGEST THE FOLLOWING:- 1)TYPE OF SCREEN IE ROTARY / VIBRATING 2) SIZE OF SCREEN 3) MOTOR HP ETC. 4) MANUFACTURER NAME THANKS AND REGARDS
Reply:	Some General Answer: Assuming reasonably free flowing material under 6% moisture (which by the way is considered dry) Your information and my response below: MATERIAL TO BE HANDLED :- CRUSHED AGGREGATE I will make assumption .....100 lbs/cu/ft typical limestone 2)CAPACITY :- 70TPH I will assume (STPH) Imperial Tons 3)FEEDING EQUIPMENT :- BELT COPNVEYOR Conveyor should be miniumum 36" wide, but ensure a full spread to full width of the screen to ensure we get the tonnage out 4)TYPE OF SCREEN: See below pick 5)MATERIAL TO BE SCREEN :- BELOW 6MM Assume install 6mm square opening,T304 stainless steel, middling wire diameter range (Could go FLEXMAT) if needed - a superior choice especially if crushed material OVER SIZE :- (-)75 TO (-)6MM 6) QTY :-4 NOS ??? CAN SOMEONE SUGGEST THE FOLLOWING:- 1)TYPE OF SCREEN IE ROTARY / VIBRATING Circle throw, vibratings screen at 25 degree decline, 1/4 (6mm) circle 1000-1100 rpm range, running counterflow rotation 2) SIZE OF SCREEN: 5x16 (90 sq ft screening area) Assuming we can pass between .8 to 1.0 tons per sq foot by sizing and without the benefit of a full sieve analysis of the feed 3) MOTOR HP ETC. 7.5 Hp 4) MANUFACTURER NAME: Dillon screen 2 brg circle throw inclined NOTE: Could be smaller depending on sieve analysis....if we do anything here.....SMALLER stroke and faster RPM and steeper angle are all do-able by the rules. Many makes of screens can do this job quite nicely.
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