US649999A - Ore-roasting furnace. - Google Patents

Description

(No Model.)

J; c. TELLEB. ORE BQASTING FURNACE.

(Application filed July 22, 1898.)

Patented May 22, I900.

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John, C, Teller :59 hi5 Attornfay,

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No. 649,999. Patented M 22 .1. c. TELLEB. ay

ORE RUASTING FURNACE.

(Application filed July 22, 189B.)

WITNESSES lNVEN TOR,

John C. Teller.

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No. 649,999. Patented May 22,-"!900."

J. C. TELLER.

DRE RUASTING FURNACE. (Application flied ul 22, 1898.)

(No Model.)

INVi-ZNmR, cTohn'C. Teller wwm sscs,

UNITED STATES v PATENT OFFICE.

JOHN C. TELLER, OF MINNEAPOLIS, MINNESOTA.

ORE-ROASTING FURNACE.

SPECIFICATION forming part of Letters Patent NO. 649,999, dated 22, 1960. Application filed July 22, 1898. Serial No. 686,566. (No model.)

To all whom it Hwy concern 1 Be it known that 1, JOHN C. TELLER, a citizen of the United States,residingat Minneapo lis, in the county of I-Iennepin and State of Minnesota, have invented certain new and useful Improvements in Ore-Roasting Furnaces; and I do hereby 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.

My invention has for its object to provide an improved apparatus for the treatment of refractory ore.

The invention will be hereinafter described and defined in the claims.

The preferred form of my apparatus is illustrated in the accompanying drawings, where in like characters indicate like parts throughout the several views.

Figure 1 is a view principally in side elevation, but with some parts shown in section and others broken away. Fig. 2 is a vertical longitudinal section of an elbow-joint used in the device. Fig. 3 is a horizontal section taken centrally and longitudinally through the rotary drum and other parts on the line m of Fig. 6. Fig. 4 is a front elevation of the apparatus with the breeching removed and some parts shown in section. Fig. 5 is a view principally in vertical central section on the line 00 0f Fig. 4, but with some parts left in full, showing thefront end of the rotary drum and its mountings. Fig. 6 is a transverse vertical section taken on the line at 00 of Figs. 1 and 3. Fig. 7 is a detail view, partly in plan and partly in horizontal section, on the line of 00 of Fig.8, showing one of the twyers and its connecting supply-pipes; and Fig. 8 is a view of the parts shown in Fig. 7, partly in end elevation and partly in section, on the line 00 50 of Fig. 7.

The main body of the roaster is in the form of a large rotary drum or cylinder 1, the in- 5 indicates the floor of a building or structure, onwhichfulcrum-sockets6 and bearing-plates 7 are rigidly secured.

? 8'9 10 11 indicate a tilting platform of skeleton form, made up of the parallellongitudinal channel-ironsS and the transverse pairs of channel-irons 9, 10, and 11, rigidly secured thereto. Near their rear ends the pairs of channel-irons 8 are provided with fulcrum-blocks 12, that are seated in the fulcrum-socket 6, and near their forward ends each pair of channel-irons 8 is provided with a nut-block 13, through which vertical ad- 3 usting-screws 14 work, with their lower ends bearing one on each of the bearing-plates 7. By means of these screws 14. the skeleton platform maybe tilted on its fulcrum 6 12.

15 indicates bearing-sheaves or flanged rollers that work in pairs on the annular hoops 3, and thus support the cylinder or drum 1. These supportingrollers 15 y are pivotally mounted between the prongs of bearing-heads 16, that rest upon and move over the upper edges of the channel-beams 10. The bearing-brackets 16 are connected in pairs by transverse tie-bars 17, which space the members apart a fixed distance and cause the same to move together. The brackets 16, which are at one side of the machine, are provided with depending nut-blocks 18, and the adjacent ends'of the beams 10 are rigidly secured together by spacing-blocks 19.

20 indicates screw-rods that are swiveled, one in each of the bearing-blocks 19, and work with screw-threaded engagement through the cooperating nut-blocks 18. The outer ends of these screw-rods 20 are provided with angular heads, to which a wrench may be applied to turn the same, and thus force the pairs of supporting-rollers 15 transversely of the tilting frame. It is obvious that when the pairs of supporting rollers or sheaves 15 are adjusted transversely of the machine the drum or cylinder 1 will be correspondingly adjusted without being raised or lowered by such movement.

The forward or receiving end of the cylinder or drum 1 is closed by a fixed disk-like head 21, which, as shown, is formed in two sections secured together by flanges 22 and nutted bolts 23. Opening through the center of the head 21 is'a transversely-elongated the roasted ore is discharged from the spout 41, and in Fig. 6 .2 indicates the crushed ore contained within the drum 1. As shown, the shaft 63 receives motion from a belt 69, that runs over the pulley 66 and over a powerdriven pulley 70. Some sort of a flexible joint or yielding section (not shown) would in practice be provided in the section 59 to permit the adjustment of the drum'.

The operation of the mechanism above described is substantially as follows: By means of the screws 14 the tilting platform and the rotary drum supported thereby may be given the desired incline or tilt necessary to cause the travel of the ore through the drum at the desired speed, and this incline of the drum,

and hence therate of travel of the ore therethrouglnmay be varied at will. As previously stated,-the ore is supplied to the hopper 32 and is fed into the receiving or forward end of the drum through the spout or tube 33 and after having been acted upon by the burning gases within the drum,will be discharged into the breechin g 39, from whence the gases will be drawn off through the neck 40 and the roasted ore will be discharged through the spout 41. Now it is very important to note (see particularly Fig. 6) that the twyers 44 are located above the axis of the drum and are inclined slightly, upward in the direction of their discharge ends. Under the rotation of the drum the body or mass of the pulverized ore within the drum will be carried upward in the direction of the rotation of the drum, and if the drum be driven at the proper'speed the mass of ore will be carried upward to a point above a horizontal line intersecting or approximately intersecting the axis of the drum. Otherwise stated, the drum should be so speeded that under centrifugal motion the ore will not commence to roll backward under the action of gravity until the upper portion of the mass has been carried sulficiently far above the level of the burner-tips to cause the particles to loosen up and fly from the mass and fall down. through the flames from the burners. Otherwise stated, the flames are applied to the flying or loosened particles of the ore which are projected from the mass thereof at the turnover when the force of gravity begins to exceed the force of the centrifugal motion. Still otherwise stated, the flames project through the loosened particles at or just below the overturn or roll-back of the stock. Hence the flames act upon the particles in a loosened-up or flying condition as they are projected from the mass of the stock under the cooperation of gravity and the centrifugal forces. The flames thus enveloping the particles in a loosened or partly-detached condition operate thereon in an extremely-effective way.

This novel method is made the subject-matter of a divisional application filed by me of date September 28, 1899, under Serial No. 731,909, entitled Method of treating refractory ores.

' When a greater or less body of ore is kept within the drum, the twyers require adjustment with respect to the drum, so as to bring the nozzles or discharge ends of the twyers proper distances from the body of ore acted upon. This I accomplish by shifting the drum and its supporting-sheaves 15 transversely of the tilting support, this being readily eifected by means of the adj ustingscrews 20, as previously indicated.

The action of the twyers and the manner in which they cause the gas and air to be commingled and the former to be variably fed by a Variation of the intensity of the latter has probably already been clearly'stated. However, it may be added that to commingle these fluids-gas and air-immediately inward of the point of combustion produces the most satisfactory results, and so far asI am aware is novel in an apparatus of this character. By means of the dampers 28 an additional supply of air may be let into the drum. In practice I would usually provide a fan or other suction device for producing a forced suction in the gas-discharge tube 40, and hence also in the breeching 39 and drum 1;

It will of course be understood that various alterations in the specific details of construction above described may be made within the scope of my invention, as herein disclosed and claimed.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

1. In an apparatus for the treatment of ores or similar material, the combination with a rotary drum, of the gas-supply pipe 34 and air-supply pipe 56, the former surrounding the latter and extending through said drum, and one or more laterally-projecting twyers consisting of the outer section 14: opening from the gas-pipe 34 and provided with the elongated discharge-opening 45, and the inner stem-sections 52 provided with the clon gated nozzle-section 53, terminating within and located concentric of said opening 45, substantially as described. a

2. In an apparatus of the character described, the combination with guide rollers or sheaves connected in pairs for adjustment transversely of the machine, of a rotary drum mounted on said supporting rollers or sheaves and laterally adjustable therewitlnanda relatively-fixed supply pipe or passage extending into the interior of said drum, and provided with twyers, substantially as described.

3. In an apparatus of the character described, the combination with guide rollers or sheaves, connected in pairs and adjustable by means of cooperating screws and nuts, of a rotary drum mounted on said supporting rollers or sheaves and laterally adjustable therewith, and a relatively-fixed gas-supplypipe extended longitudinally through said drum and pro- Vided with laterally-projecting twyers, substantially as and for the purposes set forth.

4. In an apparatus of the character described, the combination with guide rollers or sheaves connected-iii pairs, of a rotary druni mophted-olisaid s'uppeftingrollers orsh'eavesr and laterally adj ulstable therewith, means for adj ustingsa-idpairsd rollers or sheavesrto r move said drum laterally, and a a 'relati vely fiXed-gas-SlIppIypipepr passage extengiing intofithe interior of said, rumand provided Withityvyers; st'ibstantially as described.

5. The Icon'ribifiation with the rotary drum, of a gas-supply pipe ezitending into said re ceptacler lengthwise thereof; and. provided with-radiallyrprojeating twyers in line with each other having laterally elongatedzandflaring discharge extremities v iim said.- parts soarelatedras. to" give 7 a continuous unbroken line. of fiamelengthtvise of the drumywith the projecting gjets from the respective twyers overlapping with each other at their-outer ends; all substantially as and for the purposesset forth.

n In testimony whereofuI' flix m gi -n t i in presenceof two withesses.

JOHN C. TELLER;

Witnesses: JAs. F. WILLIAMSON,- BESSIE B; NELSON;

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