US1372406A

US1372406A - Rotary furnace

Info

Publication number: US1372406A
Application number: US324205A
Authority: US
Inventors: Derneden Felix
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-09-16
Filing date: 1919-09-16
Publication date: 1921-03-22
Anticipated expiration: 1938-03-22

Description

F. DEHNYEDEN.

ROTARY FURNACE.

APPLICATION FILED SEPT. 16, I919.

Patefilted M I O W 15' cidin-g with the axis of the apparatus UNITED STATES PATENT OFFICE.

rnmx nnnnnnniv, or QEABLEBOI, BELGIUM.

nounr ruanacn To all whom it may concern Be it known that I, FE Ix DERNEDEN, a subject of the King of the Bel ians, residing at 122 Boulevard Audent, (Jharle'roi, Belium, have invented certain new and useful mprovements in Rotary Furnaces, of which the following is a specification.

The lurgica particularly to a new method of constructing revolving furnaces. By revolving furnace is, generally understood apparatus rotating about an axis either horizontal or more or less inclined to the horizon and coinitself,

such apparatus being utilized in indust for carrying out various operations suc as drying, roasting or calcining and various chemical reactions, etc.

The arrangement of known rotary furnaces is varied according tothe nature of the materials to be treated and the purpose of the treatment under consideration; Thus, for instance, in continuous working furnaces in which charging regularly takes place at one side and discharging at the other, the passage of'the material throu h the apparatus itself is effected sometimes y inclining the axis of rotation, sometimes by opening out the walls of the furnace, thatis to say, try adoptin the form of a truncated cone, or again by, orming helical rooves or slots inthe front walls ofcylindrical form,

etc. In furnaces in, which the operation is effected under thev action of heat, the constructional arrangements may be consider ably'varied accordingrt o the nature and ref sults of this action he most difi'i'cult condition to fulfil however, is the prolongation 0f the length of time the material isretained in the furnace, particularl for operations that require a certain perio for their proper materialization. In the furnaces as here'- tofore constructed the length of time the material to be treatedreniains in the furnace is prolonged by rotating the furnaces so slowly that the rotation is very difiicult to carry on, or by increasing to an excessive ex' p A of the apparatus or theoriginal cylinder" in tent the total lengthof the apparatus. 50.

of a prolonged rotation of the material in the revolving furnace by subdividing the furnace into several tubes, and it multiplies in varying proportions the effects of the sim- 65 9 mm Specification of Letters Patent.

resent invention relates to the metalindustry in general, and refers more The present invention fulfils the condition dinal section, of a furnace for the roastin of blende, constructed; in accordance withv this invention. a l

Fi e 6 and 7 arecross sections ofFig. 5.- Re ferring to Fig. 1, a solid cylinder 1, is

. presumedto be rotating about the central axis in the direction of the arrow. In this Patented 'Mar. 22,1921. Application filed September 16, 1919. Serial No.- 824,205. I

cylinder are formed four small cylindrical c annels, 1, 1 1 1, arranged symmetri cally about the central axis. Assuming that 1 this cylinder revolves about .he'central axis in, the directionof the arrow, as soon asthe line 2-2 has moved a little way to the right of the vertical, any material deposited in the cylindrical channel 1' will flow throu h the inner passage into the cylinder 1 is the revolving continues, this material will have to pass, around the cylinder 1*, and itwill finish this revolution when this cylinder has reached the position that was previously o'ccupied at'the start'by the cylinder 1, that is to say, after the completion of the revolution of the furnace as awhole. At this moment the material will slip into the cylinder 1 the same movements will be repeated for its stay in this cylinder, and then for its stay in the cylinder 1. Assuming next that these

cvlinders

1', 1, 1 and 1 are each divided hroughout their length into equal compartments by means of vertical partitions, and that the communicating passages are so arranged that the first compartment of 1' communicates with the first com artment of 1 the latter with the'first of t e cylinder 1, and this latter with the first of the cylinder 1*, which cylinderwould bein communication with the second compartment of the c lindfer 1. It would follow from this cons ruction that it is necessary for the whole which the four small cylinders are engaged, to make four complete revolutions before the material has advanced one compartment. The number of sub-divisional channels may be increased, (see Figs. 3 and 4:) and the passages communicating between the various cylinder may be made at the periphery of the cylinder instead of being arrangedat t e center- -It is not necessary in practice to, partitiqn;

'ofl? the sub-divisional cylinders 1',"1",etc2

' lhis imaginary partition is given by way of e 'xpl nation-$111 practice the forward movement will proceedas iii the partitions existed; The progress or advancement of the materialwill beobtai'ned by'constructmg the aperture of the communication passage. between the

sub-divisional cylinders

1 and 1" not along a generating linebut alonga line that diverges slightly toward the hack. This advancement may also be-obtained-zby inclining or curving toward ,the back the face ofthis passage,or the face 4 -4 of the cylinderl The amplitude of; thel'adyancement may also be varied by repeating on one or'more on 'on all the passages'bf the various sub divisional cylindersthe-.ide'vice suggested for the first cylin'der lfl'i T'his-construction is in'practice ofgreat simplicity, and can be readily carried out in refractory materials as required, for example, when. applying it to the roasting of ores. Moreover in the particular icases in whichjtheref is occasion for providing for heating, a-diversity of special channels may be formed in the blocks between :the cylinders, enabling the heating to be carried out by means of a gas-producer, whichmay' even se'rvejfor 'several'piec'esof apparatus at the same time, or by any other device suitable forthe object-in-view. 1 The furnace illustrated in'F-igs. 5 to 7 comprises channels of this type. 5 designates the ehargerand 6 the discharger; 1, 1

Fund 1" designate the working cylinders through which passes '1tlie material to be treated; 7 the combustion channels,8 the inletfor the combustible gases, 9 the returns w forthe flames, 10 the exit for the smoke, and

11 the exit for the sulfurous gases.

Figs. 5, 6 and 7 are drawn as if the subdivisional cylinders, the channels, etc., were whollowedwou-t'of the material of which a single solid cylinder 1 consists. In practice these various channels and passages are ob- .tained by the juxtaposition of constructional --materials-w'hich for this purpose, have predeterminedand-suitable forms and dimenisions."

' .1. felt will bepunderstood that'this invention is applicable to a number of industries and min various constructional forms, eachdiiierent industrial application requiring an appropriate constructional modification. pllhatI claim and desire to secure by .Letters Patent of the United States is 1. A revolving furnace comprising a series of channels or'chambers arranged around 't'he-a:xis of rotation and connected with one anotherby means of passages as and for the purpose specified.

A revolving furnace comprisim a series of channels or chambers arranged around the axis of rotation and connected with one another by means of passages having inclined faces, substantially as described for the purpose specified. a 1

In testimony whereof I afiix my signature in presence of two witnesses.

FELIX DERNEDEN.

lVitnesses:

FELIX DE Cot-MAN, A. Josnrn Owens.