US1701155A - Coal jig - Google Patents

Description

Feb. 5, 1929. 1,701,155

M. s. HAcHlTA COAL JIG mea nay 14. 1925 2 sums-snm 1 Je J3 lffff/M Ill'w .E @s 143 E M I:

x hdl 2 .if

INVENTOR.

1,701,155 M. s. HAcHlTA Feb. 5, 1929.

COAL JIG Filed lay 14, 1925 2 Sheets-Shl 2 I N VBV TOR.

Y ATTORNEY.

- pure coal, coal of low grade or middlings Patented Feb. 5, 1929. E

UNITED STATES 1,701,155 PATENTN oFFEE1cE.

MAXIMILIAN s HACHITA, or wILxEs-Baann, r11Nirsurtvaiiiii.`

COAL J IG.

Application tiled` May 14, 1925. Serial No. 30,161.

rl"his invention relates to apparatus employed in the cleaning of coal of the type generally known in the art as coal jigs;

The general object of the invention is to provide an improved and novel construction ot coal jig by the employment of' which coal may be more thoroughly and efficiently separated from impurities consisting of earthy matter, such as rock, stone, slate, pebbles, sand,` pyrite, etc., than heretofore has been practical.

It is also an obj ect of the invention to provide an improved and novel construction of coal j igging apparatus whereby a mixture of7 as it is called7 and earthy material, such as rock, stone, etc., may be separated into its three constituents or separate parts.

Other objects of the invention are,to provide an apparatus of novel construction such that the thickness of the bed of material upon the jig or separating pan is maintained' at a minimuim' so that the pulsating water operating thereon may have a maximum effect in bringing about separation; to provide an apparatus of novel construction such that the bed of material upon the bottom of the jig or separating an shall be allowed to expand freely, there y producing a porous bed such that the separate particles or elements thereof may be subjected to approximately equal forces produced by the pulsating action of' the water; to provide anovel construction of jig pan comprising troughs extending longitudinally thereof, along which the heavier portions of material are caused to travel or flow, with which troughs are associated means whereby the effect of the pulsations of water in one trough is independent of the effect of' the pulsations in other troughs to provide means extending transversely of the said troughs for causing lateral movement transversely of the said troughs of the lighter portion of the material being treated, for instance, pure coal; to rovide novel means whereby the portion o the material which does not require jigging or cleansing is discharged in the early part of the jigging operation, so that the portion of the material being treated which reaches the main ig area oi the jig pan contains all ofthe heavier material and a relatively small proportion of pure coal from which it is to be separated; and also to provide novel means whereby the mixture of material being treated may be separated into three different portions.

`my invention;

I shall not undertake atthis point to indicate further objects and advantages incident to my invention, but suchl other objects and advantages will be referred to inthe detailed description `of the said invention which follows or will be apparent from such description.

trated one form of mechanical embodiment oft-he invention.` j j 1t is to be understood, however, that the invention is susceptible of embodiment in other forms of construction than that shown and that changes in the details of constructioii may be made within the scopeof the claims without departing from the invention.

In the drawings:

Fig. 1 is a view in vertical longitudinalv j section of a coal jig apparatus embodying F 2 is a. top plan view of the same;

Fig. is a transverse vertical sectional view taken on the line 3-3 of Fig. 1; 1 1 Fig. 4 is a top plan view of the vibratory .jig pan of the apparatus; j

Fig. 5 is a` view in side elevation of the/ji g pan structure, with a` portion broken away to show a part thereof in section;

Fig; 6 is a view in transverse section of the jig pan structure;

Fig. 7 is a rear end elevation ofthe jig pan; and v Fig. 8 is a sectional view of the bottom of.

the j inf pan taken on the line 8-8 of Fig. 4.

Re erring to the drawings:

1 designates a tank adapted Vto contain water employed in the washing and cleansing of the coal, which tank is supported by a frame structure 2 in known manner. tion of the front wall. and the rear wall converge as indicated in Fig. 1 to an opening 3 which is adapted to be opened and closed by a valve 4 which may be operated by a lever 5.

The j igpan structure designated as awholc` at 10 is suspended upon vertical bars 11 and 11a from eccentric straps `12 mounted upon eccentrics 13 which in turn are supported upon a revoluble shaft 14, upon one end o"I` which fast and Vloose wheels 15 are provided for" the purpose of' controlling the operation of the said sha-ft. i

The vertical bars 11 and 11a are secured by riveting to the opposite sides 16 and 17 of the jig pan.` The lower end of the bar 1l extends through an opening in the horizontal portion or flange of a bracket 18 adjustably secured to the adjacent side wall of the tanlr 1 by means of bolts 19. The upper ends of the bars 11 and 11' project into holes in the lower ends of projecting portions of the eccentric straps 12 and are secured therein by means of bolts 20. The upper ends of the said bars 11 and 1ln are provided with a plurality ofholes or f openings therethrough, so that either of the saidbars may be adjusted verticallyuso as to wary thelength thereof,

andfithereby vary thellateral or `transverse 15 pitch or inclination of the bottom 21 of the jig pan. The pitch or inclination of the bottom21 of the jigpanin a longitudinaldirection may lie-varied by adjusting the bracket 1.8 `in one direction or the other.

The bottom ofthe jig pan is provided with perforations as is usual in such structures.

i Forithe purpose of effecting separation of thepure coal from the relatively heavy material of the character already indicated the 25 jig pan is provided with a series of longitudinally extending plates or bars 25 and with `atseriesof transversely..extending plates or bars 26 which radiate from a common distant center. The longitudinally extendingbars 30 `or plates 25 are mounted directlyupon Vthebottom 21 of the jig pan and are spaced from each other, as shownso as to provide a series of troughs or runways. The bars 25 are relatively narrow, being approximately one and one-halftinches (1l/2) in width, while the bars 26 are approximately three inches (37) in width. i The latter bars are located above the bars 25 and are provided with notches 27, as shown, which notches are of rightangle 4o triangular shape. The `bars 25 project into the notches and lit againstthe vertical walls `or shoulders thereof, as best shown in Fig. G

of the drawings.

As already described, the pan is sup ported so that its bottom has both a longitudinal and a transverse pitch or inclination, sinconsequence of which the upper left hand `corner of said bottom (referring to Fig. l of the drawings) is the highest point of the same. The feed chute 30 is located in this .corner of the jig' pan,iso that the mixture to be treated is Idelivered to the highest point or portion of the bottom thereof. Theoppositefends of the three plates or bars Q6 located` nearest to theffeed chute 30 are connected to the side 16 and the left hand end wall of the jigipan. Assuming that the longitudinal and transverse inclinations of the bottom of the pan, previously referred to, are equal, andthat the opposite `ends of `the plates or bars 2G are located at points substantially equidistant from the upper eft hand corner of the bottom of the jig pan it will be apparentthat `the opposite ends of each plate or bar are located substantially the same vertical distance from any assumed lower horizontal plane, so that the top edge of each of the said plates or bars occupies a horizontal-plane. lt will be apparent, however, that the upper edges of these plates or bars will occupy different levels. By reason of thisarrangement in which the lirst three of the plates or bars 26 referred to occupy substantially horizontal planes it will be apparent that the mixture delivered from the feed chute 30 is evenly distributed over the portion of the bottom of the pan included between the third plate 2G and the feed chute.

Upon reference to Fig. el it will be noted that if the plates or `bars 26 were extended upwardly they would ultimately meet at a point upon an extension of the plate or bar constituting the right hand end of the pan shown in plan in said ligure. la a result of that arrangement it will be apparent that the relation of the bars 26 to the length of the jig pan or to the bars 25 varies as they approach the right hand end of the jig pan. It will be noted that the bars Q6 near the right hand end of the jig pan extend downwardly very nearly at right angles to the bars 25 0r almost vertically, whereas the bars 26 atthe opposite end of the jigpan extend diagonally across the said jig pan with the consequence that the bar 30 and the first two bars Q6 operate to effect equal distribution of the material to be washed upon the `jig pan thereafter as the material approaches the opposite end of the jig pan the bars 26 tend to cause downward movement of Athe cleaned or washed portion of the material to effect discharge of the same over the edge of the side 17.

fllheimixture `of coal, iniddlings or low grade coal, and earthly material, such as stone, slate, etc., is delivered to the `iig pan through the feed chute 30, which in the construction sliown is triangular in cross section. Any suitable meansl may be employed for controlling the` rate of feed ofthe mixture from the feed` chute into the pan. The material from the chute is delivered into the jig panin front of or above the first of the transversely .extending bars or plates 2G. As already stated, the upper edge of each of the first three of these bars 0r plates occupies a substantially horiontal plane, the said planes occupying` different levels. As a result of this arrangement the mixture being treated is spread uniformly over the first or initial part ofthe. jig pan bottoni.

The end and side walls ofthe jig pan are extended i below the bottom 21 thereof, as shown at 35, and the lower edges of said walls are beveled outwardly as indicated at 3G. Extending downwardly from the bottom 21 are aV of plates 3T which are in the same vertical planes as the longitudinally exteiuling bars or pla-tes and constitute dis tributor bailles.

ln the operation of the apparatus the llt) lil

Sii

a pan as the latter moves downwardly.

pan, by reason of being supported upon the eccentrics 13, `will be caused to vibrate in known manner. `When `the jig pan isvibrated the water in the tank flows upwardly through the perforations in the bottom 2l thereof as it descends. The upward flow occurs, therefore, at intervals. The depending Walls 35, the inner bottom edges of which are beveled outwardly, as indicated at 36, operate upon a downward movement of the pau to couline the water in the tank within the space surrounded by said walls and tend to cause. the saine to flow upwardly through the perforations in thebottom 21 of the jig In other words, these walls preventthe lateral spreading of the water which is located directly underneath the bottom ofthe jig pan when the. latter is moved downwardly. The presence of the spaced plates underneath the bottom 2l of the jig pan operatesto render the pulsations of the water through the portions of the jig pan between adjacent bars or plates 25 independent of each other. In other words, the material in one of said troughs, in effect, is treated independently of that in the other troughs. i

It will be notedthat the end walls and the side walljl' of the jig pan extend a considerable distance above the bottom 2l thereof` while the portion of the wall l? of thesaid pan above the bottom 21 is of a height substantially the saine as that of the bar or plate Q5 adjacent thereto. As a result of this arrangement, it will be seen that the water which fiows upwardly `th1`"ough the perforations in the bottom 21 is caused to flow laterally or transversely of the bars or plates 25 in the direction of the length of the transverse bars orplates 26, and also in the direction of the transverse inclination or pitch of the bottom 21. It may be noted that in practice the depending portions of the side and end walls of the jig pan are referred to as a four-wall baffle, while the upwardly projecting portions of the end walls and the side wall 16 are referred to as a three-wall baffle. In actual practice it has been found that apparently there is no reflex action of the water upon an upward movement of the jig pan, the reason being that the water flows in the direction of least resistance which, in the cimstruction shown, is transversely of the hars or plates 25 and in the direction of the length ofthe bars or plates 26 which is. the direction along which the pure coal flows.

It has been found inpractice that the heaviest portions of the refuse material, such as rock, stone. slate, pebbles, sand, pyrite, etc., are caught by the first two or three of the longitudinal hars or plates 25, while the middlings material which has some fuel value is caught by the remaining lower plates 25. The material in the g pan being treated has free movement so that the respective part-iing lighter than the earthy material and the middlings7 portion ofthe mixture moves or flows laterally so that due to the inclination of the bottom of the jig pan and to the transverse flow of the water produced by the threewall baffle a large proportion thereof is discharged from between the third and fourth and fourth and fifth of the transversely extendingI bars or plates 26. It will be understood that during theoperation of the device the coal being the lighter portion of the mixture assumes a position above the heavier portion of the material and is discharged laterally fromvthe jig pan over the upper edge of the side wall 17. As al result of the discharge of the greater proportion of' the pure coal j from between the third and fourth and fourth and fifth of the transversely extending bars or plates a mixture including a relatively small proportion of pure coal is left for treatment in the main jigging portion of the jigging structure. i

As the treatment continues the coalwhich is the lighter is caused to move laterally toward the side `wall 1T by the transverse bars or plates 26 and is ultimately discharged over the upper edge of said side wall, while the heavier material is conducted longitudinally by reason of the presence of the longitudinally extending bars or plates 25. In movingr longitudinally the heavy material passes through the notches 2T. As already indicated, the earthy matter, such as stone, slate, etc. is caught by the first two or three of the bars or plates .25, while the middlings7 portion of the mixture which has some fuel value iscaught by the remaining of said bars or plates. Both of these portions are discharged from the lower or right-hand end of thek'jig pan.

i For the purpose of separating the earthy material such as stone, slate, sand. ete., from the middlings which contain suiiicient coal to be `of some fuel value, I have provided an adjustable separating or switch plate 40 which is secured at its outer or rear end to a pivoted or rotatable vertical shaft 4l which is provided with a. handle 4t2 by means of which it maybe rotated. The rear or pivoted end portion of the separating plate 40 is located about the middle of the width of a discharge chute 42a. In Fig. Q of the drawings the separating or switch plate 410 is shown in a trolled middle position in consequence of which the material discharged from the three upper troughs formed by the longitudinal bars or plates 25 is discharged separately from that of the material which is discharged from the three lowermost troughs into which the jig is divided by the bars or plates 25.

Endless Conveyer elevators i3 and 44 are provided for removing the material which is discharged from the troughs formed by the bars or plates 25. It will be understood that by adjusting the plate 4() to different positions, as indicated by dotted lines in Fig. 2, 'the material to be directed to the one conveyer or to the other may be regulated and conlf it is desired that an increased quantity or proportion of the material shall be directed to the conveyer 43 the separating plate should be adjusted in a direction as indicated by dotted lines at 45 in Fig. 2. If, on the other hand, it is desired that a greater proportion of the material shall be directed to the elevator or conveyer 44 the separating plate t() should be adjusted to or toward the position shown by dotted lines at d6. rPhe position which the plate ll() should occupy will depend upon conditions which may be found to exist in each particular case. lf it be found that substantially all of the earthy mattei' is being caught within the first two of the troughs formed by the first two longitudinally extending bars or plates 25 then the separating plate 4:0 should be moved into position such that its inner or forwardly extending end shall occupy a position in adjacent opposing relation to the rear end of the second of the bars or plates 25. If, however, Vit is found that a large proportion of the material within the fourth trough is of earthy character the separating plate l- O should be or may be adjusted in the opposite direction, so that its swinging end shall occupy a position in adjacent opposed relation to the rear end of the fourth one of the said bars or plates 25.

The coal which is discharged laterally over the upper edge of the side wall 17 is confined within a restricted portion of the tanl; l` by means of a longitudinally extending partition wall 50. The coal is removed from the bottom of the compartment formed by the wall and the side and end walls of the tanlr structure by means of an endless conveyer elevating structure shown at 51. The endless conveyer elevating structures 4-3, la and 5l are of usual construction, being supported at their upper and lower ends upon sprocket wheels. The sprocket wheels at the upper ends of the structures are mounted upon a shaft 53 upon one end of which a spur gear 54 is mounted which is in engagement with a pinion gear 55 upon a shaft 56 which is driven by means of a belt 57, which in turn is driven by means of a driving wheel 58 mounted upon the shaft 14 previously referred to.

It may happen that there is aninterruption in the supply` of the mixture ofcoal and impurities to the chute 30, which, of course, will v result in an interruption of the supply to the jig pan. If the jig pan continues to operate as it usually does the treatment and separa`- tionv continues with the result that the bottom of the jig pan becomes bare or clean. This is objectionable, because when the feed is resumed the probabilities are that some coal will travelalong the clean bottom of the pan within the longitudinally extending `troughs formed by the bars or plates 25 and will be discharged with the impurities, such as stone, slate, etc. and middlings. It is desirable, therefore, that means be provided which upon the interruption of the feed of the material to be treated will prevent the discharge of material from the rear ends of said troughs.

The means or mechanism for this purpose comprises a plate 60, constituting a gate, niovably supported by means of parallel arms 61 at the rear end of the ig structure. The outer swinging ends of these arms have pivotal connection with the plate 60. One of these arms is provided with an extension 62 beyond its pivot to whicha connnecting rod 63 is connected, the opposite upper end of which is connected to an arm 64 which is rigidly connected with the rear end of a rotatable rod or shaft 65 which is mounted in bearings upon the upper portion of the jig structure adjacent the plane of the side wall 16 thereof. The front end of the said rotatable bar or shaft 65 extends through the chute 30 adjacent one side thereof. A diaphragm 66 is mounted upon the said rod or shaft within the said chute and when no ma terial is flowing through the chute occupies a horizontal position. Then the diaphragm is in such position the gate 6() occupies closed position. The diaphragm is illustrated in the position it occupies when coal is flowing through the chute. In such position the said diaphragm occupies a substantially vertical plane, the plate at such time occupying an elevated open position, as shown in Fig. 7 of theA drawings. In such position the material is allowed to be discharged from the rear end of the jig pan structure.

It will be understood that it is the weight of the mixture of coal, stone, slate, etc. upon the diaphragm G6 that moves the saine into the open position, as shown in the drawing, to move the plate or gate 60 also Vinto open position.

Upon interruption of the 'flow of the material to be treated through the chute the` weight of the plate or gate 60 is sutlicient to overcome the weight of the diaphragm 66, connecting rod 63, etc., whereby the said plate or gate is allowed to inoveinto closed position. To facilitate the opening' and closing of the gate the rotatable rod or shaft is provided at its front end with a cross bar 70 )lli upon one end or the other of which a weight 7l may be adjustably mounted. The said weight may be mounted upon either end of the bar as may be ne"essary, depending upon the relative weights of the closing plate or gate and the diaphragm 66 and connecting rod 63, etc. i j

It may be stated that in the operation ot the apparatus a minimum thicmess of the bed ot material upon the bottom of the jig pan lis maintained 'at all times and that the maximum thickness ot' the hed oit material upon the bottom of the jig pan is equal approximately to the width ot the transversely extending bars or plates i It will be seen that by my invention I have provided an apparatus of unitary structure by the employment ot' which the pure coal may be separated most eliciently from the material, such as stone, slate, etc., and middlings which it is desired to eliminate, and also that the greater portion of the pure coal ted into the jig pan is delivered or discharged therefrom as a pure j product during the initial part of the operation before it has reached the main jigging area of the ig pan; that the bed of material upon the bottom of the jig pan is maintained in a state of manimum porosity due to the tact that the particles thereof are free to move and to expand; that the material being treated may be divided into three separate parts which thereafter' may be treated and handled as may be desired; that the discharge of the heavier material of the mixture being treated is automatically interrupted upon the interruption of the feed of material to the jig pan; and that the pulsations ofthe water through the portions of the bottom of the ig pan between the longitudinally extending bars `or plates are cqualized so to etlect separation ot the coal from the portions of the mixture which it is desired to eliminata Although I have described my invention as eml'iodied" in a structure for treating and cleaning coal, it will be understood that it may be adapted and employed for the treatment of other substances which include por-- tions of different specific gravities which it is desired to separate.

Having thus described my invention, what l claim and desire. to secure by Letters Patent is:

l. A coal comprising a pan having :i perforated bottom and having longitudinally extending' spaced plates secured in adjacent relation to the top side of said bot ioni. and also having transversely extending spaced plates secured in spaced relation to each other adjacent the top side of said hottoin, the latter plates converging toward a central point located outside of and above one end portion ot' the jig pan, the said latter plates being situated above the First-ninbred platest 2, A coal jig comprising a jig pan having a perforated bottom and having longitudinally extending narrow plates secured in spaced relation to each other adjacent the top side of the said bottom and also having transversely yextending"plates radiating from a common center and secured in spaced relation to each other abovethe top side of the said bottom, the said latter plates being of greater width than the former and being providedwith notches into which the upper edge portions of the lirstnamed plates extend, the said notches forminor passageways transversely of and underneath thesaid second-named plates. l

A coal jig comprising a jig pan having relatively narrow plates extending longitudinally thereof in spaced relation to `each other and in adjacent relation to the top side ct' the bot-tom of said pan, and also having transversely extending plates arranged `in spaced relation to each other above the firstnamed plates and in adjacent relation to the bottom of the said jig pan, said transversely extending plates being provided with notches through which the material guided by the said longitudinally extending plates `may pass, and means tor separating the material which may be discharged from between the `tiret-named plates into two different portions.

4. A coal comprising a jig an having a bottom and side and end wal ,the said bottom being exposed and the said walls extending a distance below the said bottom,`

and one ofthe side walls, and the end walls extending a relatively great distance above said bottom, and the other of said side walls extendinga relatively short distance above the said bottom, means for support-lng sald jig pan with its bottom inclined longitudinally and laterally `from the first-named side wall, and the saidjigpan having longitudinally extending bars spaced from each other and mountedin adjacent relation to the to) side of the said bottom, and also having ba de plates located underneath the said bottom and in the vertical planes of the said bars, and spaced plates extending transversely of the .said bars and supported in spaced relation to each other adjacent the top side ot the bottom of said pan, saidtransversely extending plates being of greater Width than the said bars and being provided with notches into which the said bars `extend,` which notches provide passageways through which the impurities which may be intermingled with the coal are adapted to pass.

A coal jig comprising, in combination, a jig pan inclined both longitudinally and transversely, a feed chute for delivering a mixture of coal and impurities to one corner of the said jig pan, the end walls and the side wall adjacent the said chute extending a relatively great distance above the bottoni of said pan while the other' side 'Wall of said jig pan extends but a short distance above the bottom of said jig pan, bars or plates Secured in spaced relation to each other adjacent the top side of the bottom of said jig pan, said bars ext-ending longitudinally of the said pan, plates secured in spaced relation to each other and extending transversely of said jig pan and being secured so the bottom edges thereof occupy positions adjacent the top side of the bottom of said jig pan, said transversely extending plates being provided with notches into which the said longitudinally extending bars or plates project, the first three of the said transversely f extending bars located nearest to the said feed chutehaving their upper edges located in substantially horizontal planes, while the upper edges of the remaining transversely extending plates are inclined with respect to a horizontal plane, substantially as described.

6. A coal comprising in combination a jig pan, `means for supporting said jig pan with its bottom inclined both longitudinally and transversely, whereby one edge and one end of said bottom are higher than the oppo site edge and end respectively, a feed chute for feeding a mixture of coal and impurities to said jig pan, the delivery end portion of said feed chute being located in the highest corner of the said jig pan, means for providing troughs extending longitudinally of the said jig pan, transversely extending plates-supported in spaced relation to each other with the bottom edges thereof adjacent the `top side of the said bottom, the top edges of said plates lextending a short distance above the top edges of the opposite sides of the said troughs, and the said transversely extending plates being provided with notches in their lower edges through which material may `pass as it moves through the said troughs toward the discharge end of the said jig pan, the opposite ends of each of a number of said transversely extending plates near the feed chute occupying positions snb stantially equi-distant from said corner whereby the upper edges thereof occupy substantially horizontal planes, substantially as described.

7. A coal comprising a jig pan having a bottom which is inclined both longitudinally and transversely, means for delivering material to be treated to substantially the highest poi-nt of the said bottom, bars extending in spaced relation to each other both longitudinally and transversely of the said bottom upon the top side thereof, the transversely extending bars having passageways therethrough upon the undersides thereof, and means for causing water to flow transversely of the length of the said bottom and substantially in the direction of the length of the Vsaid transverse bars, substantially as described.

8. In coal washing apparatus comprising a tank containing water, the combination of a jig pan located in the said water the said jig pan having a bottom provided with perforations and also having spaced narrowl bars secured therein in adjoining relation to the top side of the said bottom and extending longitudinally thereof and also having plates secured within the said pan in adjoining relation to the top side of the `said bottom, which plates extend diagonally of the length of the said jig pan and being provided with notches located within the spaces between the said bars and forming passageways, means for e'ecting vibration of the said pan, and plates mounted upon the under side of the bottom of the jig pan in vertical planes for directing independent streams of water upwardly through the perforations in the bottom of the said jig pan between the said bars which streams are caused by the vibration of the said pan.

In testimony that l claim the foregoing as my invention, I have hereunto signed my name this 11th day of May, A. D., 1925.

MAXIMLIAN S. HAGHITA.

Images