Патент USA US2119185код для вставки
May 31, 1938- R. o. STOKES EH1 7 2,119,185 APPARATUS FOR SEPARATION OF MINERALS Filed Deq. 26, 1955 V4%é/MWM 2,119,185 Patented May 31, 1938 lJNlTED STATES PATENT OFlFliZE 2,119,185 APPARATUS FOR SEPARATION OF MINERALS Rupert Octavius Stokes and John Caldwell Allan, London, England Application December 26, 1935, Serial No. 56,298 In Great Britain December 29, 1934 1 Claim. (Cl. 209-427) The invention relates to apparatus for the separation or classi?cation of minerals of the type in which the material to be classi?ed or separated is supported on a perforated tray immersed in 5 water and in which there is relative movement be tween the water and the tray. In a jigging screen such as the Hancock, a per at the lower edges of the side walls of the table 5 and are held down against them by boards 63 one on each side with wedges 42 under ?anges 43 at the top of the table sides. A chute 44 serves for the supply of raw ma terial and make-up water. Under the in?uence of the table movement the material moves from forated screen is provided with upright dividing left to right in Figure l and heaps up against walls which divide it up into compartments or the rear wall of. the boxes 38 of the next com boxes with perforated bottoms, and ragging or material of higher speci?c gravity and of a size partments and against the end wall in the 10 last compartment. The upper, lighter material (gangue) passes over to the next compartment or over the end wall to the discharge spout 6, whence it is taken to other parts of the plant not concerned in the present invention. 15 slightly larger than the screen perforations is ?lled into these compartments. The invention is directed to a particular form of screen allow 15 ing for easy removal and renewal of the perfo According to the invention a The heavier ore collects at the centre of the table for separating or classifying minerals with lower right hand end of each compartment and means for reciprocating it in an up and down direction in water comprises side walls and re may be discharged continuously if the raw ma terial has a fairly high ore content. If on the other hand the ore content is low the discharge may be intermittent to allow a reasonable quan rated bottoms. movable box-like structures with sloping perfo rated tops and open bottoms in which adjustable apertures are provided adjacent to the lower end tity to accumulate between discharges. of the sloping perforated part in communication with the upper side of the said perforated part and the under side of the adjacent perforated In either case the gate shown in. Figure 4 is used. A valve or slider 41 with an inverted part. verse wall of the adjacent compartment by a strap 48 adjustable in height and is moved up and down by a rod 49. The strap 48 is adjusted by means of slotted bolt holes. It will be seen that the discharge aperture 46 is in the form of a trapezium of. adjustable width and height in the transverse wall. A guide member 93 behind An embodiment of the invention will now be described in conjunction with the accompanying drawing, in which Figure 1 is a sectional elevation of the moving table, Figures 2 and 3 are sectional end elevations of the same taken on the lines II——II and III—III of Figure 1 respectively and looking in the direc ticn of the arrows, and Figure 4 is a fragmentary elevation of the dis charge apertures and valves. Referring to the drawing, a jig for ore con centration is provided with known means: for re 40 ciprocating it in water, and is divided in the ex ample shown into three compartments and in each compartment the ?oor is made up of four box-like structures 38 to 4| with sloping perfo rated tops. Of these 38 and 39 are of the same 45 height right across and 40 and 4! have in the middle a gradually deepening channel to urge the heavier material towards the centre, at which position the discharge gate is mounted. The boxes 38 to 4| are supported on inward ?anges V-shaped notch in it is guided against the trans 25 the discharge aperture 46 localizes the discharge. The cross-section of the path traversed by the ore is, however, made greater than the largest opening 46 of the valve 41. What we claim is: A table for separating or classifying minerals with means for reciprocating it in an up and down direction in water comprising side walls 40 and removable box-like structures with sloping perforated tops and open bottoms in which ad justable apertures are provided adjacent to the lower end of the sloping perforated part in com munication with the upper side of the said per 45 forated part and the under side of the adjacent perforated part. RUPERT OCTAVIUS STOKES. JOHN CALDWELL ALLAN.