US471618A - Apparatus for desulphurizing ores - Google Patents

Description

(No Model.) s sheets-sheen 1. J. LEEDE. APPARATUSFOR DBSULPHURIZING GRES.

No. 471,618. Patented Mar. 29, 1892.

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J. LBEDE. APPARATUS POR DESULPH-URIZING GRES.

Nm 471,618. Patented Mar. 29, 1892.

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APPARATUS POR DESULPHURIZING DRES. Y No. 471,618. Y K Patented Mam. 29, 1892.

NITEg STATES PATENT OFFICE.

.IULIUS LEEDE, OF MINNEAPOLIS, MINNESOTA.

' APPARATUS FOR DESULPHURIZING CRES.

SPECIFICATION forming part of Letters Patent No. 471,618, dated March 29, 1892.

Application filed October 2 3, 1889. Renewed September 5, 1891. Serial No. l04,82% (N o model.)

. name of sulphurets, which contain sulphur,

arsenic, antimony, tellurium, dto., in varying proportions in connection with the precious metals, it. has been difiicult, if not impossible, to expeditiously and economically eliminate the base metals and compounds and prepare the oresforamalgamation, lixiviation, or sm elt- Y due expenditure of time and fuel-or loss of mineral arising from inherent defects in prior processes and apparatus.

The invention consists in certain arrangements of instrumentalities and combinations of parts hereinafter more fully described, and set forth in the claims.

In the drawings, forming a part of this specification, Figure l is an elevation of my improved apparatus, taken from the front. Fig. 2 is a central vertical section of the same, showing the operating-levers in elevation and the condenser partly in elevation and partly in section. Fig. 2 is a plan showing one of the chemical chambers in section. Fig. 3 is a plan,a portion of the upper part of the furnace being removed. Fig. iis a detail showing the liquid spraying device, and Fig. 5 is a detail of the blast-nozzle.

A is a tripod or support for the furnace, mounted on any suitable platform or foundation. Obviously this support may be made of cast or wrought metal or it may be built up of masonry. Upon this support is mounteda a hopper O, from which the ore'is removed after treatment by means of a conveyer (not shown) or in any suitable way. The roasted ore may be directly conveyed to crushing or pulverizing rollers and thence to amalgamator, smelter, or other place of deposit in well-known ways.

The hopper C is arranged Within the support, as shown.

D D D are plates hinged to the casting B, as shown. These plates form the bottom or hearth of the roasting-chamber, and for convenience I will hereinafter call them dumping-plates.

which they are operated to open and close by means of operating-levers and connectingrods, hereinaftery described. These plates are triangular in form and are inclined downward toward the center of the furnace, thus forming a bottom of general conical shape. This is for the purpose of preventing binding by reason of expansion from the intense heat. In case they should expand, however, they may be relieved by means of the turn-buckles shown.

Within the upper flange b of the casting B lire-brick E are arranged and form the outer walls of the tire-chamber of the furnace. The height of this chamber is usually made about twenty inches or the length of two ordinary fire-brick. Obviously this may be greater or less, and brick of the required dimensions to use a single course may be made for the purpose. A tie-band F is adjusted around the brick at the joint or about midway between the top and bottom of the chamber, as shown in Fig. l. Instead of such band the brick may be surrounded and supported by a cylinder of cast, sheet, or plate metal. Mounted on the top of the brick is another similarI casting B, and a second re-.chamber withv dumping-grates is formed in all respects like the irst. It is my purpose to have three or more tire-chambers, one above another, and above all a hopper of suitable capacity to hold a charge of ore for one chamber of the furnace, each compartment having dumpingplates for discharging the ore to the chamber next below.

Doors for ingress to the fire-chambers for b. The under fiange b embraces the `walls of Each bottom section is provided .M with an outwardly-proj ecting arm d, through IOO the purpose of igniting the fuel are provided, and a peep-hole e for each fire-chamber is arranged so that the operator may observe the condition of the interior.

Reiiectors maybe arranged for convenience of inspecting the upper chambers. The lip ZJ forms a shelf over the outer edge of the dumping-plates and prevents clogging upon the return of the grate to its normal condition.

G is a segmental frame or support, to which is pivoted a series of operating-levers g g, through which and the connecting-rods and crank-levers shown the grates are opened and closed. Turn-buckles are used for adjusting the length of these connecting-rods to insure the exact throw to fully close the grates.

H is the flue common to all the fire-chambersy through which theA products of combustionA pass tothe condenser I. The flue is jacketed, .as-seen at h, for the circulation. of water to cool and condense the escaping fumes.

The condenser I is provided with zigzag passagesand with settling-pockets it', as shown, and the side boundaries of the pockets are provided with removable capst'2 or with doors through which the deposits may be readily inspected and removed from time toy time.

'K- is an air-blast passage leading from a suitable power-driven blower to each tirev chamber at three or more points, and L is a gas orfuel pipe leading-from a suitable source of supply under pressure to and through the airdischarge passages Within the fire-chambers.

The-nozzles of the blow-pipe are made by sawing or slitting the end of a pipe below a d-iametrical line and then bending the under lip or jawup against thelonger part, leaving the lateral openings 7c lo" inthe form shown,

so that the discharge of gas and air will be l freest near the circumference of the lire-chamber, in order that the vflame may 'reach al1 parts of the ore with approximately the same forceand effect.

Cocks rn-m are arranged, as shown, so that either the gas or air, or both, may be shut off or turned on to either or to all of the firechambers as may be desired.

Misa steam or liquid-supplyconduit leading from. any suitable supply under pressure'. This conduit is provided at its extremity within the lire-chambers with a perforated f nozzle fn. for spraying` liquid or distributing steam throughout the fire-chamber for chilling the ore, cooling the chamber or the intro.- duction of reducing orconverting agents as may be desired. Interposed between the source and discharge and connected with the conduit M bybranch pipes are one or more chemical chambers O. Cocks are arranged so as to divert the steam or liquid pastor through either or all of these chambers, one of which is designed to contain salt and the others such chemical or mixtures of chemicals or solvents as may be desirable in the treatment of vthe character of ores herein contemplated.

Pis a torch or gas-burner-flexibly connected with source of supply for use in igniting tho burners in the fire-chambers.

The operation of my apparatus is as follows: Ores reduced to about the size of stovecoal or less are introduced in any approved way tothe hopper at the top of the furnace, gas is turned on to the upper chamber and lighted, and the blast is started. The ore is then dumped into said chamber and the up- -per plates returned to normal position- The ore is then heated by the blow-pipe flame to a, proper heat and held in the chamber until the surfaces within the range of the flame have come approximately to the proper condition. In the meantime, if the ore gets too hot or if for other reasons it is desirable for disintegration or decomposition jets or. sud- `den dashes of Water or chemically-charged water or steam are admitted to the chamber.`

The gas is then lighted and the blast turned on in the next chamber andthe partiallytreated ore is dumped to said chamber anda new charge is introduced from the hopper to the upper chamber.

cordi'ng to the judgment or instructions of the operator and the character and condition In some instances when the ore.

of the ore.` contains a large amount oflsulphur the gas is used only to bring said ore to such heat as will ignite the sulphur, after which it (the gas) is cut off and the blast continued, thus oxidizing the mass. Again, should the mass become too hot it may be cooled by reducing 4the blast or by the introduction of water or steam. t

It isrobserved that the operations are severally under the direct control of the attendant, and that the heat, the amount of fuel introduced,l the relation of blast to fuel, and of both to the character of the ore, the cooling in case of great rise in temperature or the chilling in case it be desired to suddenly chill the mass for disintegrating the same or for other purposes, as Well as the introduction of chemical reagents, is absolutely underv the vwill of the operator. The time of treatment vin each chamber may bemade to correspond,

and thus a charge of ordinary ore may be introduced and discharged every few minutes.

l-I-aving described my invention, Vwhat I claim, and desire to secure by Letters Patand air supply under pressure communicat- -ing with the conduits, whereby a blow-pipe vilame is caused to extendl entirely within'the The dumping'mixes" and turns the ore so as to present new surfaces to the flame, and the treatment is continued or modified in the second chamber, ac-

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combustion-chamber, across the hearth, and

beneath the body of the ore, substantially as described. l Y

2. In an apparatus for treating refractory ores, the combination of an ore and combustion chamber, gas-burners leading to said chamber, separate air and gas conduits coinmnnicating with said burners,a source of gas and of air supply under pressure communieating with the conduits, and means, substantially as described, for introducing chemicals at will, whereby the mass is subjected to an oxidizing ame and chemical reagents, substantially as described.

3. In an apparatus for treating refractory ores, the combination of a series of combustion-chambers, one above another, movable hearthsordumping-plates pivotally supported in the Walls of the chambers, operating-levers at the side of the furnace, and connecting devices between the levers and plates, substantially as described.

4. In an apparatus for treating refractory ores, thecombination of a fire-chamber, hearth, or dumping-plate sections pivotally supported in the fire-chamber, and an internally-proj ecting lip in the fire-chamber above the dumping-plate sections, substantially as described.

5. In an ore-treating apparatus, the combi- 4 nation of a lire-chamber, a chemical chamber communicating With said ire-chamber, a pipe for steam .or liquids extending from a source of supply to said chemicalchamber, and

means, substantially as described, to divert -this lst day of October, A. D. 1889.

JULIUS LEEDE. [1.. s] In presence of- JOHN P. GRIsT,

V. D. STOOKBRIDGE.

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