US996548A

US996548A - Process and apparatus for roasting ores.

Info

Publication number: US996548A
Application number: US58562110A
Authority: US
Inventors: Arthur R Wilfley
Original assignee: JOSEPH SEEP
Current assignee: JOSEPH SEEP
Priority date: 1910-10-06
Filing date: 1910-10-06
Publication date: 1911-06-27
Anticipated expiration: 1928-06-27

Description

v A. R.v WILPLEY. PROGESS AND APPARATUS, FOR ROASTING ORES.

APPLICATION. FILED 0OT.6, 1910.

Patented June 27, 1911.

4 SHEETSSHBET 1.

A. R. WILFLEY. PROCESS AND APPARATUS FOR ROASTING DEBS;

APPLICATION FILED 00'1.6, 1910.

996,548., Patented June 27,1911.

4 BHEETSSHEET 2. 5

/4. T o z I r 511m: 0 fox l 91471400920 A. R. WILPLEY.

PROCESS AND APPARATUS FOR ROASTING ORES. 1

APPLICATION FILED 0013.6, 1910.

996,548., Patented June 27, 1911.

'4 SHEETS-SHEET 3.

witnesses @%5%%% a A. R. WILFLEY. PROCESS AND APPARATUS FOR ROASTING GEES;

1 APPLICATION FILED OOT.6, 1910. 9 ,54 1 Patented June 27, 1911.

4 BHEETB-SHEET 4.

UNITED STATES TE EEicE.

'ARTHUR R. wILELEY, or DENVER, ooLomo, Asswmn'or ONE-HALF To JosEPH SEEP, or TITUSVILLE, .rENNsYLvANIA.

PROCESS AND APPARATUS FORECASTING ORES.

To all whom it may concern:

useful Improvements, in Processes and Apparatus for Roasting Ores; and I do" declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had .to the accompanying drawings, and to-thefletters and figures of reference marked thereon, whichform a part. of this specification.

My invention relates to a process "and apparatus for roasting ores.

Thisinvention is more especially intended 'for use in producing what is known as a magnetic roast, meaning a roastwhich shall render the ore magnetic or. amenable to the action of. magnetism for the purpose of separating. the metallic particles. from the} gangue.

.The process, however, consists 'inemploy ing steam or other suitable moisture con-; taining' fluid for the .purpose of completely removing the ore particles. from the roasting hearth, the vapor serving at the same time by virtue of its moisture, to check oxidation and thus prevent the possible over-roasting of the ore for purposes of,

magnetic separation...

the drawing, an endless horizontally disposed rotary hearth is employed. As illustrated in the drawing, a nozzle for passing vapor across the hearth in a transverse di-v rection is shown. Of course any suitable apparatus may be employed, for accomplish ing this purpose, Iilurthermore, the apparatus includes tanks or jackets through which cooling liquid is constantly circulated, said jackets being located in such proximity to the ore on the hearth as to ,eificiently perform the function of preventthe space surrounded bythe circular trav-.

eling hearth is utilized as a chamber into which the roasted ore is removed through the agency of the vapor blast. This space is screen covered for the purpose of preventing the escape of the-ore particles while Specification of Letters latent. Application filed October 6, 1910. Serial 110385521.

, Patented June 27, 1911.

allowing the escape .of any uncondensed f Be it known that I, ARTHUR R. WILFLEY, a citizen of the United States, residing in. the city and county of Denver and State of Colorado, have invented certain new and;

vapor "with.

Having briefly outlined my improved process together with a suitable apparatus and air which may be mingled therefor carrying outthe process, I will proceed to describe the invention in detail, reference. 7

urthermore in this view the top of the central chamber is partly broken away. Fig. 2 is a section taken through the feed hopper also cutting chamber on the line 2--2 Fig. 1. Fig. .3 is a Isectiontaken on the line 3+3 Fig. 2. 4 is a section taken on the line 4-4 Fig. 1.

Figs. 5-a'nd 6 are sectionstaken on the lines 5-5 and 6+6, respectively, of Fig. 1. I

The same reference characters indicate the same partsin all the views.

the hearth and roasting a Let the numeral 5 designate a roasting chamber,

hangers connected with the hearth and carrying wheels '8 which engage tracks 9 '-for supporting the hearth. Journaled in the bed or lower part of the masonry 10 is a shaft 12 upon which is mounted a gear wheel 13 which engages a gear l tsecured to the bottom of thetraveling hearth; To

v the outer exposed. end of the shaft is made In my improved apparatus as disclosed in fast a pulley wheel 15 whichmaybeconnected by 'means of a belt with any suitable.

6 the endless traveling hearth, .7

motor adapted to supply the power for imparting hearth. V

As illustrated in the drawing, stationary rabbles 16 are mounted in the roasting chamber for the purpose of stirring the ore, whereby its particles are advantageously exposed for roasting purposes. However, if the layer of ore upon the hearth is sufli ciently thin, rabbling may be dispensed with. Heat is supplied to the roasting chamber 5 from a furnace 17 having a grate 18, sufficient fuel 19 being supplied to the grate through an opening 20 normally closed by a door 21. The heat and products of combustion pass to the roasting chamber through' an opening 22 communicating with the combustion compartment of the furnace above the grate.

' the traveling movement to the hopper 23 having a distributing roll 24 below its discharge opening, whereby the ore is evenly distributed upon the hearth as the latter passes below the. hopper.

Receptacles 25 are passed transversely through the roasting chamber above the hearth and are adapted to receive cooling water, which is circulated 'therethrough through the agency of

pipes

26 and 27, the

pipe 27 being provided with a valve 28.

The steam or other moisture-containing vapor is delivered to the hearth through a nozzle 29 connected with a supply pipe 30 having a controlling valve 31.

As illustrated in the-drawing, a housing 32 covers the hearth and extends inwardly as shown at 33, partly covering a central chamber 34 into which the ore particles 35 are carried as they are removed from the hearth through the agency of the vapor. blast. The central portion of the chamber 34 is covered by a screen 36 of suitable mesh to prevent the escape of the ore particles, but at the same time permitting the escape of vapor and air.

In carrying out my improved process, the ore is fed to .the endless traveling hearth through the hopper 23, being distributed thereon through the agency of the roller 24 it has made only a portion of the circuit.

blast from the nozzle29.

However, in case more than one nozzle were employed, more than one feed hopper also would be necessary in order that the hearth mightbe supplied with ore immediately after its removal therefrom through the instrumentality of the vapor blast. However, the employment of more than one vapor nozzle and more than one feed hopper would be mere duplication, and it has therefore not been jthought necessary to illustrate this modification in the drawing.

In order to distribute the roasted ore within the chamber 34, deflectors 37 are provided; One of these deflectors is so located that the ore strikes it as soon as it leaves the hearth, under the influence of the vapor This deflector-is curved to give the ore a sort of whirling action as it enters the said chamber, and this action causes it to strike the second deflector on the opposite side, but with less force. It is believed that the two deflectors will be sufficient to distribute the ore approximately evenly within the said chamber.

The roasted ore may be removed from the central chamber 34 in "any suitable man- 5 ner. It would, of course, be practicable to make a hole in the wall underneath the circular chamber in which the hearth is located, through which the ore could be dragged out of the chamber by theuse of long rakes or by an endless conveyer, as desired. These features are not illustrated as nothing is claimed upon the manner of removing the ore. from the said chamber.

Having thus described my invention, what I claim is:

1. The herein described ore roasting process, consisting in subjectingthe ore to the action of heat upon a hearth and removing the ore therefrom by a moisture-containing vapor blast.

2. The herein described ore roasting process, consisting in subjecting the ore to the action of heat upon a traveling hearth, and removing the same therefrom through the agency of a moisture-containing vapor blast, for the purpose set forth.

3. The herein described ore roasting process, consisting of subjecting the ore to heat upon an endless travelin hearth, and removing the ore from the earth at a predetermined point or location in the circuit of travel, substantially as described.

4. The herein described process for producing a magnetic roast, consisting in subjecting the oreto heat upon a revolving hearth and discharging a moisture-containing-vapor blast across the hearth, whereby the ore is completely removed from the hearth at a predetermined point or location in its circuitof travel, substantially as described.

5. Theherein described ore roasting process, consisting in heating the ore upon a hearth and completely removing the same therefrom by subjecting it to the action of a moisture-containing vapor blast, substantially as described.

,6.. The herein described ore roasting process, consisting in heating the ore upon a traveling hearth, employing cooling liquid placed in the vicinity of the hearth for properly reducing the temperature, and completely removing the ore from the hearth at predetermined intervals through the agency of a moisture-containing vapor blast, substantially as described.

7. An ore roasting apparatus comprising an ore roasting chamber, an endless traveling horizontally disposed circular hearth located in said chamber, an ore chamber surrounded by the ore roasting chamber, and means for removing the ore from the hearth and discharging it into said ore chamber through the agency of a fluid blast.

8. An ore roasting apparatus including an endless traveling horizontally disposed circular hearth, an ore chamber surrounded by the hearth, and means for removing the ore from the hearth and discharging it into said chamber through the agency of a fluid blast,

said blast being directed crosswise of the hearth, substantially as described.

9. An ore roasting apparatus comprising a circular ore roasting chamber, an ore chamber surrounded by the roasting chamber, and means for removing the ore from the hearth and discharging it intosaid central ore chamber through the agency of a fluid blast directed crosswise of the hearth, the central ore chamber having a covering composed in part of mesh material sufficiently fine to prevent the escape of ore from the chamber, substantially as described.

10. An ore roasting apparatus comprising a circular roasting chamber, a-horizontally disposed traveling hearth mounted in said chamber, an ore chamber surrounded by the roasting chamber, and means for removing the ore from the hearth and discharging it into the central ore chamber through the agency of a fluid blast directed crosswise of the hearth, the central ore chamber being equipped with curved deflectors for the purpose of distributing the ore in the said chamber, substantially as described.

In testimon whereof I afiix my signature in presence 0 two witnesses.

ARTHUR R. WILFLEY.

Witnesses:

A. J. OBRIEN, F. E. BOWEN.