US1090549A - Ore-cooler. - Google Patents

Description

F. LAIST.

ORE COOLER.

APPLICATION FILED NOV. 8, 1913. 1,090,549. Patented Mar. 17, 1914.

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COLUMBIA PLANOGRAPH C0,, WASHINGTON. D- c.

F. LAIST.

ORE COOLER.

APPLICATION FILED nov. a, 1913 Patented Mar. 17, 1914.

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COLUMBIA PLANOOIAPH c0, WASHINGTON. D :4

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FREDERICK LAIST, OF ANACONDA, MONTANA.

ORE-COOLER.

Specification of Letters Patent.

Patented Mar. 17, rem.

To all whom it may concern Be it known that I, Fanonnron LAIST, citizen of the United States, residing at Anaconda, in the county of Deerlodge and State of Montana, have invented certain new and useful Improvements in Ore-COOL ers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in rotary ore coolers; and it consists in the novel features of construction more fully set forth in the specification and pointed out in the claims.

In the drawings, Figural is a part side elevation and part longitudinal vertical section of my improved cooler; Fig. 2 is a longitudinal middle section enlarged, of the feed end of the cooler; Fig.8 is a vertical cross-section on the line33 of Fig. 2; Fig. i is a vertical cross-section on the line 4t-4tof Fig. :2 taken through the water-head at the feed end of the cooler; and Fig. 5 is an end view looking at the discharge end, and a cross-section of the piping on the line 55 of Fig. 1. a

The present invention relates to that type of'orecoolers-in which the hot ore or calcine from the roasting furnaces is cooled (preparatory to leaching) in a rotating tube or barrel, the ore passing through the tube in one direction, while the cooling medium (water as a rule) circulates through the cooler in the opposite direction. This type of cooler is generally constructed of a; tubular shell traversed by the hot ore, the

water circulating through pipes on the inside of the shell, the pipes terminating in annular chambers or heads to which they are directly connected.

Obviously, the greatest changes of temperature are undergone by the shell, and it is one of the objects of my invention toallow said shell to freely expand and contract undervariations of temperature, without producing a strain on the parts entering into the construction of the cooler, and without in any wise affecting, or interfering with, the operation of the cooler.

A further object here sought is to simplify the construction so as to reduce the cost thereof, and minimize repairs.

The invention possesses further and other advantages which will beapparent from a detailed description thereof, said description being as follows:

Referring to the drawings, 1 represents an open-ended tube or drum of boiler plate or equivalent material, mounted at a slight incline, the walls of the drum having disposed thereon a series of annular trackbands or rings 2, 2, resting on rollers 3, 3, supported on a suitable foundation, the drum being further provided with an annular gear ring f meshing with a pinion 5 on a shaft 6, the latter having rotation imparted thereto by any system of gears from a suitable source of power (not shown), whereby rotation is imparted to the drum about its axis. The features alluded to are well understood in the art, are shown conventionally, and no attempt is here made to enter into any detailed description thereof. Besides, the driving mechanism or gearing may be changed to suit conditions, a matter wholly within the purview of the skilled mechanic.

In the present embodiment of my invention, I provide the tube or drum 1 with an intake water-head 7 at the ore-discharge end, and with a similar discharge waterhead 7 at the ore-intake or feed end, the drum dipping from the ore-feed end toward the ore-discharge end. These water-heads have each an annular chamber C for the circulating medium (preferably water) and are constructed in any suitable mechanical manner, but preferably as shown, that is to say, the head 7 is composed of an annular plate a towhich is bolted an annular channel ring I), the head 7 being composed of a somewhat similar annular plate a to which is bolted an annular channel ring I). The

chambers of the respective heads are connected by circulating pipes 8 disposed about the surface of a cylinder, and close to the inner walls of the shell of the drum as shown. At intermediate points the pipes pass through the body portions of annular rings 9 secured by angle-pieces 10 to the shell, said rings preventing sagging of the pipes and insuring stiffness therefor, though the pipes have free play in the openings of the rings through which they pass. The ore-feed end of the drum 1 is provided with an annular head 11 secured in position by angle-brackets 12 (or otherwise) the adjacent ends of the circulating pipes 8 passing freely through the body portion of said head. Tapping the outer wall of the intake water-head 7 is a cluster of water-distributing pipes 13 which radiate from a common supply-pipe 14 provided with an ordinary cut-off hand valve V, said pipe 14: leading from a stufiing box B of conventional design, into which the main water-feed pipe P discharges. The pipe P and stuffing-box B are supposed to be fixed or stationary. The peripheral walls of the discharge head 7 are provided with openings 0 through which the heated water (or other cooling medium) discharges into a launder (not shown) as well understood in the art, The chambers C, C, are made water-tight by suitable gaskets or packing rings 1, a construction well within the purview of the skilled mechanic.

The operation of the cooler may be described as follows: Rotation being imparted to the drum or cylinder 1 at a speed comformable to the rate of advance the ore shall have through the cooler, the hot calcines as they leave the roasting furnace are fed into the upper end of the drum through the opening of the WtttGF-IIGEIdI, the mass or charge gradually gravitating toward the discharge end and escaping in a cooled state through the opening of the annular waterhead 7, as fully indicated by the arrows in Fig. 1. At the same time cold water (or its equivalent) is caused to circulate from the supply pipe P, through'the distributing pipes 13, chamber of the head 7 circulating pipes 8, and chamber of the head 7 the hot water finally making its escape through the openings 0 of said discharge head 7 The Water thus circulates in one direction while the ore travels in the opposite direction. By the time the ore reaches the discharge end of the drum it is cooled down to substantially the temperature of the inflowing water, the outflowing hot water being discharged through the openings 0 of the head 7. The head 7 of the drum, being secured directly to the shell or tubular portion thereof, the head 7 being in turn coupled to the circulating pipes 8 leading from the head 7. The sliding fit of the pipes 8 through the rings 9 and terminal head 11 secured to the shell of the drum allows the shell to freely expand and contract under variations of temperature, the space 8 (Fig. 2) between the end of the drum and head 7 being ample to allow for the maximum expansion to which the shell may be subjected. The rollers 3 by the way are sufficiently wide to accord the rings or bands 2 the necessary play thereover during the expansions and contractions of the shell, the width of the pinion 5 being suflicient to permit the pinion to remain permanently in engagement with the gear ring 4:.

It will be noticed that the present cooler may be considered a part is devoid of the conventional water-jacket, such a construction being objectionable for the reason that a water-jacket necessitates two concentric walls whose joint stifiness interferes with the free expansion and contraction of the shell, and for the further reason that a jacket is liable to leak. It also means increased cost of construction and increased quantity of material. In the present embodiment of my invention I illustrate one cylindrical row of circulating tubes 8; but it is within the scope ofmy invention to provide one or more rows of such pipes, and I do not wish to limit myself to a single row; neither do I wish to restrict myself to the precise mechanical details here pipes or 7 illustrated, as these may in a measure bedeparted from without spirit of the invention.

Features shown but not alluded to are well understood in the art, and need no description in the present connection. .Obviously, the invention is not to be understood as limited to the cooling of ore, the term orecooler appropriate, and because the cooler was primarily designed for treating from ore-roasting furnaces.

Having described my invention, what I claim is r 1. In combination with a vessel traversable by a charge of hot mat'erialand provided with intake and discharge means, means rigidly coupled .to one end of the vessel and interposed in the path of traverse of the material, for conducting a cooling medium through the vessel, the walls and the opposite end of the Vessel being free from the means traversed by the cooling medium, whereby the vessel is free to expand and contract under variations in temperature.

2. In combination with a rotatable openended tube having a feed and discharge end and traversable by a charge of hot material, a water-head at the discharge end of the tube, circulating pipes leading from and rigidly connected at one end to, said waterhead on the inside of the tube and free from the tube walls and from the feed end of the tube, the said pipes discharging at points adjacent to the feed end of the tube, the latter being free to expand and contract under variations of temperaturewithout affecting the circulating pipes.

3. In combination with a rotatable openended tube having a feed and discharge end and traversable by a charge of hot material, a chambered member at the discharge end of the tube, means for supplying a cooling medium to the chamber of said member, circulating pipes leading from and rigidly connected at one end to, said chambered member 011 the inside of the tube and free from thg tube walls and from the feed end of the tu e,

being here employed because most hot calcines the said pipes discharging at'points affecting the nature or adjacent to the feed end of the tube, the latter being free to expand and contract under variations of temperature.

a. in combination with a rotatable tube traversed by a charge of hot material and provided with an intake and discharge for said material, a chambered member at the discharge end of the tube, means outside the tube for introducing a cooling medium into said chamber, cir ulating pipes leading from the chamber on the inside of the tube, for conducting the cooling medium to the opposite end of the tube, a chambered member coupled to the discharge ends of the pipes and provided with discharge means, said last mentioned chambered member and the pipes being free from the walls of the tube whereby the latter may freely expand and contract under variations in temperature.

5. In combination with a rotatable openended tube having a feed and discharge end and traversable by a charge of hot material, a chambered member at the discharge end of the tube, means for supplying a cooling medium to the chamber of said member, circulating pipes leading from and rigidly connected at one end to, said chambered member on the inside of the tube and free from the tube walls and from the feed end of the tube, a chambered member free from the feed end of the tube, into which said circulating pipes discharge, said last named chambered. member being provided with discharge means for the cooling medium, the tube being free to expand and contract under variations of temperature.

6. In combination with a rotatable openended tube traversable by hot material to be cooled, an annular water-head secured to the tube at the discharge end thereof, means outside the tube for introducing water in ture, in presence distributed volume to said water-head, a series of circulating pipes leading from the water-head at points contiguous to the inner walls of the tube, means on said walls for supporting and guiding said pipes, the pipes having a sliding fit in said supporting and guiding means, an annular head at the intake end of the tube, the discharge ends of the circulating pipes passing loosely through and beyond the body portion of said annular head, an annular discharge water-head coupled to the projecting ends of the pipes and receiving the discharges therefrom, and provided with peripheral discharge openings for the hot water, the discharge water-head being spaced a suitable distance from the adjacent end of the tube, and disconnected therefrom, whereby the tube is free to expand and contract under variations in temperature.

7. In combination with an open ended vessel traversable by a charge of hot material and provided with intake and discharge openings for said material, means rigidly coupled to the vessel at the discharge end for the material and leading from said dis charge end to the intake end for conducting a cooling medium through the vessel during the traverse of the hot material therethrough, said conducting means being free from the walls and from the intake end of the vessel whereby the latter may freely respend to changes in temperature, and means for discharging the cooling medium at points contiguous to the intake end of the vessel.

In testimony whereof I flfi lX my signaof two witnesses. FREDERICK LAIST.

Witnesses lV. H. SHEERIN, ALBERT E. WVIGGIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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