US915531A - Mechanical roasting-furnace. - Google Patents

Description

v R. VONV ZELEWS'KI.

MECHANICAL BOASTING IUBNAGE. PPLIUATION FILED JUNE 15, 190s.

91' 5 ,.531 Patented Mar. 16, l1909.

ofney.

unirsi) sfrn'rns ROMAN VON ZELEWSKI, OF ENGIS, BELGIUM.

MECHANICAL ROASTIQl'G-FURNACE.

Application filed .Tune 15, 1908.

T o all whom it may concern.'

Be it known that I, ROMAN vonT Zn- Lnwsrrr, residing at Engis, in the Kingdom of Belgium, have invented certain new and usei'ul Improvements in Mechanical Tiloasting- Furnaces; and l do hereby declare the Vlolllowing to be a full, clear, and exact description oi' the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to mechanical roasting-furnaces and particularly to that class thereof which is equipped with two devices arranged independently ol each other i'or stirring and transporting the ore, in order to regulate the pre-roasting in the chargechainber and the finish-roasting in the endor discharge-chamber independently of each other. Notwithstanding the fact that this arrangement oi said devices permits the transformation of existing roasting-furnaces of the older hind into roasting-furnaces, wherein the pre-ro asting as well as the iinishroasting can he regulated at will, it does not suflice to carry on the pre-roasting without any interruptions.

The object oil my present invention now is to construct new roasting-furnaces in such a manner, that a continuous pre-roasting ol' the ores can taire place. To this end devices i'or stirring and transporting the ores are not only arranged in the charge-chamber as well as in the endor discharge-chamber oi' the i'urnace independently7 of cach other, hut also the endor discharge-chamber is divided into a plurality oi finish-roasting-chamhers arranged independently oil each other. ln doing so it is not only 4made possible to uninterruptedl y operate the charge-chamber, lout also to operate simultaneously therewith the finish-roasting-chainhers thus l'orined. The advantages gained lhy thus transforming the endor discharge-chamber into two or more finish-roasting-chainhers consist in a considerable saving oi time and in a higher working capacity ol' the roasting furnace. Besides this a more advantageous, uniform, and speedy pre-roasting is obtained than hitherto it has been possible, because the heating oi the charge-chamber accomplished by the gases developed during the finish-roasting in the iinish-roasting-chamhers is never interrupted, since there is always one or more of the iinisl'i-roasting-chambers in full opera- Specicaton of Lett-ers Patent.

Patented March 16, 1909.

Serial No. Z138,597.

tion. By this arrangement it is not necessary to interrupt the heating process in the charge-chamber each time a new charge o'l` pre-roasted ore is introduced into one or the other oi' the i'inish-roasting-chamhers, as it is the case in the existing roasting-furnaces, provided with but one iinish-roasting-chamber, so that by this means an additional increase of the working capacity 0i the roasting-furnace is secured.

ln the accompanying drawing a verticalsectional view ol' my improved mechanical roasting-furnace shown.

The lower part ci' the body 1 olI my irnproved mechanical roasting-furnace is here divided into the two finish-roasting-chamhers 2 and 3, which number might, however, be increased ii so desired. These 'finishroastinLchainhers are connected hy means or" the channels Li and 5 to the multistoried charge-chamber G and the floor of each ol' said finish-roasting-chamhers is provided with a number olA heating-ihres 7. The charge-chamber 6 is here shown to consist ol the threesuperimposed stories 8, 9 and 1U, the number oi' which may oi' course he varied to suit any given conditions. The rotatable stirring andA transporting device 11 of the charge-chamber 6 consists ol the vertical shai't 12 and the three sets oi rahbles 13, 14 and 15 `which are equipped with the usual hlades or teeth 16 which are roof-shaped on the one side and provided `with oblique faces on the opposite side, for only stirring the ore when rota-ted in one direction and transporting the Ore when rotated in the opposite direction, as customary.

To discharge the ore from the several stories oi the charge-chamber 6 the oblique faces oi the teeth 1G ci the sets oi rahbles 13 and 15 are arranged to move the ore toward the circumference oi the stories S and 1), since the discharge openings 1'? oi the licor 13 and the discharge-openings 19 of the iioor 2() are located in proximity ci the annular wall or the charge-chamber, whereas the oblique faces of the blades or teeth 16 of the set of rahloles 14 are arranged in a direction opposite to that oi the oblique laces of teeth 16 iol the other two sets ci rabhlcs, since the dischargeopening 21 of the intermediate iloor 22'is located at the center of the latter. The discharge-openings 19 oi" the floor 2O are provided with slides 23 for a purpose to be more fully explained later on. Rotation is imparted to the shalt 12 by means of the electro-motor 24, )laced in the vai-alt 25 beneath the charge-chamber 6. The shaft 12 is suitably journaled in the iioor 18 and in the crown 26 of the vault 25 by means of the bearings 27 and 28 resifieeti e y.

ln the iinisheroasting-chanibers -2 a stirring and transporting device 29 is arranged which consists of a vertical shalt 30, journaled in a step-bearing 31 and the bearing 32, and the set of rabbles 33 the blades or teeth 34 of which are roolshaped on the one side and provided with oblique faces on the opposite side, as customary. Beneath the iioor 35 of the iinish-roasting--chamber 2 the shai't 30 of the stirring and transporting device 29 carries a bevel-Wheel S6 which meshes with a similar wheel 37 secured to a horizontal shaft 3 The latter is journaled in the bearings 3Q and t0 and is lilie the vertical shaft 12 driven by an electromotor 41. 1n a siniilar manner the iinish-roasting-chamber 3 is provided with a stirring and transporting device 12, which consists of the shalt d3, journaled in the step-bearing i4 and the bearing L15, and the set of rabbles t6 the blades or teeth i7 of which are root-shaped on the one side and provided with oblique faces on the opposite side. Below the floor 48 of this iinish-roastma-chamber the shaft d3 carries a bevel-wheelL Li9 which meshes with a similar wheel 50 seated on the horizontal shaft 51 which is iournaled in the bearings 52 and 53 and driven by the electroinotor 54.

1t is evident that instead of the electroinotors 24, i1 and 5a other driving-means might be employed to rotate the stirring and transporting device 11 of the charge chamber (i and the stirring and transporting devices 29 and i2 of the finish-roastingchainbers 2 and 3 independently of each other and in opposite directions, or to set them at rest at will.

The improved mechanical. roastingd'arnace operates as follows: rlhe ore to be roasted is intro duced into the charge-chamber 6 through the feed-hopper 55 into the upper story 8 of the charge-chamber 6 and then distributed over the floors 18, 2O anil 22, whereupon the hopper-slide 56 is closed. As at every moment at least one of the finish-roastingchambers 2 and 3 is in full onerzition, the newly introduced ore is brought a t once into contact with the heat and gases emanating from the operated iinish-roasting-chanibei'. After distributing the ore the direction of motion of the rabbles 13, 142 and 15 is reversed to stir the ores until they have been sutliciently preroasted. Supposing now, that the finish-roasting-chaniber 2 is still in operation and that the i'inish roastingchamber 3 has been put in a condition for the reception of a new charge oll prea'oasted ore,

eraser the slide adjacent to the upper end of the channel i which until now was open will be closed and the slide 23 adjacent to the upper end olf the channel 5 opened, as shown. Yi."ilhen now the stirring and transportingl device 11 is rotated to discharge the preroasted ore from the charge-chamber G it will pass through the openings 17, 21 and 19 into the channel 5 and hence into the iinishroasting-chamber 3. Baring this time the operation of the iinish-roasting chamber 2 need not be interrupted as the heat and gases emanating tl'ierefroni can escape by way of the circular space 57 through the opening 19 used for the discharge of the pre-roasted ore into the channel 5.

fis soon as the pre-roasted ore has been discharged, new ore is introduced again into the charge-chamber 6, distributed on the several floors 18, 22, 2O and preroasted, as described before. ln the meantime the iinishroasting of the pre-roasted ore in the iinishroasting-chamber 2 has been accomplished and the ore is discharged from this chamber in the well known manner, during which time the door 58 is held open by means of a weighted latch Before doing so, the slide 23 adjacent to the upper end of the channel 4l has been closed to compel on the one hand the heat and gases emanating troni the iinishroasting-chamber 3 now in full operation to pass directly from the channel 5 through the opening 19 nearest to it into the charge-chamber 6, and to prevent on the other hand that any ore drops unnecessarily through the other opening 19.

As soon as the last charge of ore contained in the charge-chamber 6 has been pre-roasted to the ccsired degree it is discharged into the iinish-roasting-cl iniber 2 and then the charge chamber 6 is charged again with fresh ore. when during this time the preroasted ore has been finish-roasted in the finish-roasting-chainber 3 it is dischz'u'ged through the door 60 held open during this operation hy the .ifeighted latch 61. The gases and other products of combustion wiich leave the charge-chamber 6 are led into the air by means of the chimney 62.

From the foregoing it will be seen, that by means of niy improved mechanical roastingfurnace the ore can be pre-roasted to any desiredL degree independently of the` finishroasting-chainbers 2 and 3, and the iinishroasting in the latter carried on independently of the charge-chan1ber t3. lt is thus made possible to not only carry on the preroasting of the ore without interrui'itions, but also to regulate the pre-roasting to suit any kind of ores and without being influenced thereby in any manner by the :finish-roasting operations.

instead of the two tinish-roasting-chainbers shown in the accompanying drawing any number of them might be arranged as coi'iveniently can be grouped around the lower part of the roasting-furnace.

I claim l. A mechanical roasting-furnace of the class described comprising, a furnace-body, a charge-chamber in said furnace-body for preroasting the ore, and a plurality of finishroasting-chambers for finish-roasting the preroasted ore arranged independently of each other and communicating with said chargechamber.

2. A mechanical roasting-fiunace oi the class described comprising, a furnace-body, a charge-chamber, a stirring and transporting device mounted therein, a plurality of iinishroasting-chambers arranged independently of each other and communicating with said charge-chamber, and a stirring and transporting device mounted in each ot said finish-roasting-chambers.

3. A mechanical roasting-furnace of the class described comprising, a furnace-body, a charge-chamber arranged therein, a rotary stirring and transporting device mounted in said charge-chamber, means for operating said stirring and transporting device, a plurality ol vlinish-rofisting-chambers arranged upon the outside of said furnace-body and communicating with the interior of said charge-chamber, a rotary stirring and transporting device in each of said finish-roastingchainbers, and driving-means for each of said stirring and transporting devices mounted in said iinish-roasting chambers.

4. A mechanical roasting-furnace of the class described comprising, a furnace-body, a multistoried charge-chamber arranged therein, a stirring and transporting device mounted in said charge-chamber and operating with a set of rabbles in each of said stories, means for rotating said stirring and transporting device in either direction and for setting it at rest at will, a plurality of finishroasting-chambers arranged. independently of each other and. jointly communicating with said charge-chamber, a rotary stirring and transporting device in each oi said 'linish-roasting-chambers, and driving means for each of said stirring and transporting devices mounted in said linish-roasting-chambers.

5. A mechanical roasting-furnace of the class described, comprising, a furnace-body, a charge-chamber, a rotary stirring and transporting device mounted therein, means for operating said stirring and transporting device, a plurality of finish-roasting-chambers arranged upon the outside of said furnacebody, channels connecting the crowns of said 'linish-roastingchambers with said charge-chamber, a recessed Zone of said furnace-body forming a communication between said channels below said charge-chainber, a stirring and trans orting device in each of said 'linish-roasting-c ambers, and drivingmeans for each of said stirring and transporting devices mounted in said :finish-reas ting-chambers for rotating said stirring and transporting devices in either direction and for setting them at rest at will.

6. l'n a mechanical roasting-furnace of the class described, a furnace-body, a multistoried charge-chamber arranged in the upper part oi said furnace-body, a plurality of iioors arranged within said charge-chamber and provided with discharge openings, slides for closing and opening the dischargeopenings of the bottom-floor of said chargechamber, a hopper for introducing the raw ore into the top-story of said charge-chamber, a rotatable stirring andtrans orting device mounted in said charge-cham er, means for rotating said stirring and transporting device in either direction and for setting it at rest at will, sets of rabbles carried by said stirring and transporting deviceand operating in the several stories of said chargechamber, and means for leading off the products of combustion leaving said chargechamber.

7. In a mechanical roasting-furnace ol the class described. a furnace-body, a chargechamber, a plurality of nish-roasting-chambers, channels connecting said iinish-roasting-chambers with said charge-chamber, a recessed Zone in said furnace-body forming a communication between said channels below said charge-chamber, a iloor )rovided with heating-lines in each of said 'irish-roastingchambers, a discharge-door in each of said iinish-roasting-chambers, a weighted latch for each of said discharge-doors, a rotatable stirring and transporting device mounted in each of said iinish-roasting-chambers, and means for each of said stirring and transporting devices for rotating them independently of each other in either direction and for putting them at rest at will.

8. ln a mechanical roasting-furnace of the class described the combination oi a furnacebody with a charge-chamber, superimposed 'floors in said charge-chamber having discharge-openings vertically arranged in a staggered relation to each other, slides for shutting and opening the discharge openings of the bottom-'floor at will, a hopper for admitting raw ore, rabbles for stirring and transporting the ore on said floors, means for rotating said rabbles simultaneously in either direction and for setting them simultaneously at rest at will, a chimney for leading oii the aroducts of combustion escaping from said charge-chamber, a plurality of iinish ro asting chambers arranged independently of each other around the base of said furnace-body, channels connecting the crowns of said finish-roasting-chambers with the slide-operated openings of the bottomiloor of said charge chamber, a recessed Zone in said furnace-body forming a communicaeither direction and for setting them at rest at will.

in testimony whereof I have sighed my llame to this specification in vthe presence of two subscribing witnesses ROMAN VGN ZELEVJSK.

Witiiesses H. A. JOHNSON,

PENDLETON CRUGER.

tion between said channels below said chargeehamber, a ioor provided with heating-ihres in each of seid iiiiish-ro@sting-chambers, :t discharge-door for each oi" said iilish-roast- 5 i11g-ohambers, a weighted latch for each of said discharge-doors, a rotatable stirringI and transporting device mounted in each of said finish roasting Chambers, and means for rotating each of said stirring and transport- 10 ing devices independently of each other in

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