USRE14121E - X c coal-washibtg- jig - Google Patents

Description

C. A. WENDELL.

COAL WASHING HG. APPLICATION FILED FEB'. 21.*1916.

Ressued Apr. 25, 1916.

C. A. WENDELL.

`coAL wAsHmGJlG. APPLICATION FILLVED FEB. 21,1916.

Reissued Apr.25,1916.

` 2 SHEETS-SHEET 2.

Y No to a novel Jig or concentrator 1n which air CARL A.'` WENDELL, 0F JOLIET, ILLINOIS.

COAL-WASHING are.

Original No. 1,163,292, dated December 7, 1915, Serial No. 12,918. Serial No. 79,768.

To @ZZ 'wfwm t may concern:

Be it known that I, CARL A.v VVENDELL, a citizen of the United States, and resident of'Joliet, in the county of l/Vill and State of Illinois, have invented certain new and useful Improvements in' Coal-Washing Jigs, of which the following is a speciication.

My invention relates to apparatus for washing coal and has particular reference and water are utilized to cause 'separating action. i

An object in the constructionof the present device is to eliminate all bearings, pistons, belting, shafting, etc., and to cause the agitation of the coal by .changes in the level of the water used in the washing action.

Al further object is to construct such a device which shall occupy a vcomparatively small space but which will handle a large tonnage; a device inl which vibration is eliminated and the Stresses equally distributed thereby making possible a much lighter construction; a device in which the commonly employed mechanism is dispensed with, withl the resultant economy in horse power and upkeep. The construction shown in the present application relies upon a" pulsating action of the water within the jig for the purpose of agitating the material and causing the separation of the slate: from the coal. ireferably the coal to be vwashed is crushed and is laid onto the screen which is covered lwith pieces of feldspar of a size considerably grcater'than the mesh of the screen. The water within the container is then given a pulsating action which causes tl'e coal and slate to stratify, the slate being heavier than the coal. Likewise on account of its weight the slate or refuse works through the feldspar bed and through the screen, the washed coal being discharged with the water.

The invention will be morereadily understood by reference to the accompanying drawings, wherein,

Figure l is an elevation partly in section 'showing a jig constructed in accordance with my invention; 2 is a plan view of the same, and, Fig. 3 is a sectional view of the valve.

I Referring to the drawings it will be seen that I provide an outer cylindrical casing in the form of a' hopper 1,0, at its lower end Specification of Reissued Letters Patent.

lclosed -and the ports 37 and Reissued Apr. 25, 1916. Application for reissue led February and in the form water and, On the interior ofthe outerthe interior thereof by" means of short tubes 2l, equally .spaced around the device. An exliaust"fan 22, acting in conjunction with a suitable valve 23, and a tank 24, provides for anintermittent pneumatic actionupon the water in the jig. The pulsating action of the water is secured by the employment of air pressure inducing means, such as the fan 22, which communicates by a short conduit 26, with the equalizing tank 24:.Y A conduit 27, connects the tank to the valve 23, the details of which are shown in Fig. 3. A similar the valve; the connection between the valve and the main, or conduit 20, of the coal washing jig is in theform of a short tubu# lar connection 29. The details of the valve, as shown in Fig. 3, include a casing 30, within. which is mounted a three-partpis-` ton 3l, 32, 33, all actuated by a single stem 34, the same being caused "to reciprocate by a cam 35, actuated .by a belt pulley 36, con'- nected to a suitable source of power. The casing is provided with a port 37, communicating with the conduit 27, ports communicating with the conduit 29, and the main 20, ports 40, 41, communicating with the supply conduit 28, and the port 42, communicating with the atmosphere. In the position shown in Fig. 3, the air is being drawn out of the mains 20, 29, into the exhaust fan 22, for the reason that the ports 38, 40, are in communication. developed at this stage by commodated by outlet from the tank being closed by the position of the piston When thepiston is shifted to a reverse position,

the fan is ac- 39 are in communication, whereby the pressure accumulated in the equalizer tank is directed into the main and not only restores the pressure .100 Thepressu're the equalizing tank 24 theL the poit 38, is

in the main...to atmospheric but preferably raises `the pressure slightly -thereabove In this position vof the parts theV supply conduit 28, iisopen to the atmosphere because the ports 40, 42,' are in communication, thus furnishing a supply of air at atmospheric pressure to the blower which is forced into the equalizing tank in readiness for further The details of this valve are disclosed and claimed in mv copending application, Serial No.12,920, filed March 9,1915.

Coal is supplied throughthe inlet 25, ,to the surface of the screen 16, a bed of feldspar or similar material having previously been placed on the screen. Water is adm1t.

ted through the pipes 26, and fills `the inner and outer shells until it overows the top ,y air into tank-24, gradually lls said tank and raises the pressure ofthe air contained in the tank to a few ounces above atmos pheric pressure. Valve 23, which is covered in the copending application referredto above, is adapted to alternately open and close the pipe to the fan and to the tank so tankto the shell of the washer is open, and the air in the tank 24 thus escapes into the outer shell of the washer. This air being under pressure of a few ounces above atmospheric, is suflicient `to 'cause a downward movement -of the water inthe outer shell'.

. .Hence an upward movement of thewater through the inner shell. When the valve is jnaposition to close the opening from tank j 462%, theo ening from the fan 22 is opened and the an 22 withdraws the air from the youter lshell of the washer, thus causing an upward movement of the water in the outer shell and consequent downward movement of the water in the inner shell, thereby imparting to the water in the inner shell the necessary agitation for the washing of the coal on the screen 16. This causes 'a vertical reciprocation of the water within the ydome and a. consequent pulsation or vvertical reciprocation -ofthe water in the inner shell and likewise. the agitation of the coal whichrestsupon the screen. 'As this coal is agitated the heavier materials, such as slate are filtered down through the feldspar bed and thev screen and dropped into the lower porjtion of the shell from which such refuse is stations. Preferably the area of the 'screen bed removed as required by manipulating the' valves 18, 19, and without stopping operan is substantially the same as the area of the -domeand therefore the displacement of wapractically the entire friction loss and this loss, of course, is comparatively small.V Thus it is found that a washing apparatus of a capacity considerably greater than the Inachines at present in operation may be cons tructed with a horse powerv consumption veory much less than heretofore thought possi le.

Obviously the construction is capable of l several modifications and such modifications as are within the scope of 'my claims I consider within the spirit of my invention.

I claim: 1. In a coal washing apparatus, the comhina-tion of inner and outer shells eachof which is adapted to contain water, the presf sure on the surface of the water in the inj ner and outer compartments being substantially balanced, means for' supporting a' r`body of material to bewashed within'the inner shell, and pneumatic means for causing an alternate reductionl of pressure, below., atmospheric and increase of pressure above atmospheric and thereby causing pulsating `action to the water in the inner compartthatgwhen the valve is in'a position to close `the pipe to the fan the passage from the terial thereimsubstantially as described.

2. In a coal washing apparatus, the combination of adjacent water containers, means f within one of said containers for supporting a bed 'of material tol be washed, pneumatic means acting' upon vthe surface of th'e'water within one container and means for causing.

a pulsation of said pneumatic means wherethe pressure is alternately changed from positive to negative whereby the material is agltat'ed andthe portions of different specilie gravity caused to stratify, substantially as described.

3. In a coal washing apparatus, the combinationof adjacent shells, means for sealing the top of one of said containers whereby the air pressure on the water therein may be 'reduced and the elevation of thewater within said container changed thereby,

means in the other container for supporte.v

ing a bed of material toA be washed, and means for repeatedlyv changing the pressure conditions in the sealed container from above to below atmospheric whereby the liquid in the other container is alternately reciprocated and the Amaterial thereby agitated.

4.- Ina vcoal washing device, the combination of a pair of concentrically located con-v tainers the t p of one of which is sealed to -the atmosph e, a screennear the top of the other container, pneumatic means communicating with the sealed container and acting upon the surface of the liquid therein, said pneumatic means being arranged to cause pulsations of the liquid Within the sealed container by means of intermittently changing the air pressure from above Aatmospheric to below atmospheric and consequently the agitation of the liquid and materials in said inner container, substantially as described.

5. In a Washing apparatus for granular material, the combination of a pair of concentrically arranged containers, means for sealing the top of the outer container to the atmosphere, the top and bottom of said inner-container being open, a screen Within of the Water within said inner container,

means for delivering to said screen the material to be Washed and for discharging the washed material over the edge of said inner container due to the agitation caused by the Water.

CARL A. WENDELL. Witnesses: Y

W. C. FRY, Jr.,

THOMAS J.- SAMrsoN.

v Copies oi this patent may be obtained for du cents each, by addressing the "Commissioner aliments,"`

Wallington, D. C."

Images