USRE10912E - Territory - Google Patents

Description

\ H. IRSCHING.

Assignor of one-haifto A. Nmnmeaws sa F. JUNG;

REDUCTION 0F ORES.

No. 10,912. Reissued Mar. 20, 1888.

PATENT OFFICE.

HENRY HIRSCHING, `or sALT LAKE c ITY, UTAH TERRITORY, AssIGNoR oF ONE-HALE INTEREST To ALEXANDER NIEDRINGHAUs AND FRANZ g f JUNGK, BOTH OF SAME PLACE.

" SPECIFICATION forming p a of Reissues um" Parent No. 10,911 dans Maren 20.1888.

Original No. 365,746, dated J' une 28, 1881. Applica-tion To allv whom it may concern.'

' Beit known that I, HENRY'HIBSOHING, a citizen of the United States, residing at'Salt Lake City. in the county of Salt Lake and Ter-l ritory of Utah, have invented certainnew and useful Improvementsin the Reduction of Ore's. of which the following is a full, clear, and exact description. -f j My invention relates to a process and means I o for 'separating gold, silver, lead, and copper from the mineral gangue with 'which these metals-are found, which will be fully'nnderstood `from the following description, when taken in connection with theA annexed draw-- ing, in which the figure` represents a vertical section through the major portion of a double plant adapted for' conducting my improved process. v ABefore describingmy invention I will state 2o that I am aware that it is not broadly new to employ a process of chloridization inthe separation .of metalsfro'm the gangue with which they are found; or to separate or purify met. als, such as gold and silver, from the mineral impurities.' .v f y Y My object is to intimately combine chlorine with reduced ore containing metals whichit is desired to separate from the mineral por-j tions, thereby forming chlorides, or such salts l 3o as can be freely disassociated from the metals f by heat, leavingthe metal practically pure.

In carrying ont my ,improved process I employ an apparatus or plant which I have illustrated inthe annexed drawing,which is a ver- 35 tical section throngh myilnproved apparatus,

and which I'will now describe, referring said drawing by letters.

The plant proper consists of one or more cylinders, A, one or more chloriuegas gener- '40 ators, B, anexhansting-engine, C, a pump, an

ore-crusher, rollers, a water-tank, settlers, a precipitating apparatus,and acalcination and refining furnace.

' I have represented in the annexed drawing t'wo vertical cylinders, AA'. I shall in theV following description explain a single apparatus, although I have shown means for dupli eating vthe process.

The capacity of the vertical cylinder A may with means for rotating it.

for reissue died February 13, 1888. Serial No.

be,say,twenty tons,`{more or less.) It may con sist of boileriron lined with clay, bricks, or

other suitable material, and painted with soluble glass orother coating adapted for the pnrpose I have Ain view.

Atsnitable distances apart in the cylinder A, 'Il employ metal 'rectangular vframes a, adapted 'to serve asstays and keys.. In localities where good-'clay can beeconomically employed I useas a lining cylinders of this material, of about -two feet indiameter and two feet long, pre- 1 pared similar to sewer-pipes suitably joined, and between the joints I'employ the stay rods or frames a, above referred to.

At the lowerend of the cylin verted'cone, A', preferably of castiron,which may-be flanged and united by, bolts to the lower flanged shellv of the cylinder A, so that thev former can be readily removed when desired and a new. one substituted. This inverted cone A'- is what I denominate the filter, and will' bev hereinafter again referred to. The upper end o f the cylinder A, or chargeopenin'g, is covered by a vmovable' sieve, b, .which preferably rests upon springs. The, shaking of this `sieve ise'ected by an eccentric or knocker, c, which lmay be actuated by suitable connections with au engine. (Not shown in the drawing.) Instead of using this sieve b a' perforated revolving horizontalcylinder may be employed andlocated on top of the cylinder A, and provided with a funnel for conducting the charges of hot-roasted ore into it. If such a perforated cylinder is eniployed, it should be provided with a door to receive the charges fromthe funnel,and also To the lower end of the vertical cylinder A, I apply an exhausting apparatus, C, connected to the outlet-piped of the funnel A bya pipe, d', and, if vfound desirable, this .exhauster C may be connected by a pipe, d, to the apex of the movable cover A,appled to the top ot' the cylinder A, to which pipes oneor more regulating-cocks should be applied, as shown in the drawing.

` tion when the wash-water ceases to pass throughV the ore in cylinderA, which operation is contnued for a short time only.

der A is an in- Thisexhauster'C- is set in opera- -95 lower end of the cylinder A. Thus the chlorine gas is compelled to pass from the lower end of this cylinder upward through the en -tire body of the ore therein, regulated by the cock in said pipe e.

If desirable, the chlorine gas may be introduced into the top of the'cylinder A, and by means of the exbauster above described the gas is forced through the entire body of ore in said cylinder from above downward, which I consider practically the equivalent of forcing thel gas upward through the ore.

The vessel B is provided with a funnel, f, for supplying it with sulphuric acid and water to mix with the black oxide of manganese and chloride of sodium (salt) t'o form chlorine gas, and on one side of lhe funnelapcrture is another aperti1rc,'f, forl the funnel, both of vwhich apertures should be closed while generating the gas. A discharge-cock, f isa'lso applied to the vessel B. y This vessel is mounted ou a furnace` D,which may be heated with gas or other suitable fuel, depending upon the ea pacity of the cylinder A for containing ore and the facilities at hand for conducting the prof cess.

The gas generating and exhausting appara tus may be located upon a lower or an uppe'r floor, as circumstances may require.

On the upper oor or level, E, I locate the boiler, the engine, the pump, and watertanks.4

The tank F is provided with a pipe-coil, G, which is connected with the boiler H, so that by passing steam through the coil hot water can be obtained. 7 i

On the floor E, I locate tanks for contain-- ing the hyposulphitebfsodiu in solution and the calcination-furnace, which are connectedby a. track or a direct sheet-iron fiume with the charge-opening of the cylinder A.

By means of a iiume or pipe, J, provided, with a regulatingfcock, g, the filtered liquor is conducted from the lower end of the til-ter A into a series of settlers, K, the last'or lowest one, K', of whichv is used as a precipitationtank.

When only small quantities of metal are atL tained, the liquor may be drawn from the filter A' directly into carboys and precipitated by the usual process inthelaboratory.

The precipitate is fused in a reverberatory furnace with soda and the produced bullion is assayed.

WVhen the extraction is complete, the cock or ,gate h is opened and the ore is discharged from the cylinder A by means of a chute, h', facilitated by a stream of water. vThe cylinder -,is then ready for another charge and repetition of the process.

It will be observed from the| foregoing that the o're is chloridized, leached, and extracted in one and the same cylinder, A, without moving the same. f y

The improved process is conducted as fol` low's: The cylinder A is charged gradually withcalcined ore immediately after it is taken from the caleining or roasting furnace,and

the tempera tu re of thefroasted ore should not All compounds of silver exceed 850 Celsius. are: decomposed at this temperature, and when they are brought in contact with chlorine gas Silver. according to the heat which is found necessary to`-decon1pose the ore. Before charging the fcylinder Al with ore the chlorine-gas apparai tus is set in operation, and the said cylinder is lled with this gas. which is freed from the Woulfs washing-tank D', as abovestated, in which tank chlorine-gas water is produced for subsequent use..-

The gas-generating apparatus should be continued in operation and the! gas forced -in cylinder A until it is fully `charged with ore. When all the chlorine gas is absorbed, which absence of its peculiar color, a second passage of gas may be introduced. perform a complete Aconversion ol' all the silveri'nto chloride of silver. The lead and copper are also (-hloridized, but not the gold. About forty gallons of hot water are now poured' overl the ore in the cylinder A, which per, the liquor being carried oli" into the proper tank by opening Ihc stop-cock g. As soon as thesolution begins to cool, the lead crystallizes out; but in order to receive all thelead and copper quickly, I may apply the well-known a two per cent. of liyposulphite-of sodiumsolution. About ten 'gallons of 'this solution are now forced over the ore. A few hours decantatiou is suiicient to dissolve all the silver chloride. The stop-cock g is kept open, andI wash until no black precipitate occurs upon from 'the lower end of the cylinder A by sample-cock i. The quantity of copper and lead is generally small, for which reason it may be treated directly in tlicsilverprecipitation tank with sodiumlsulphide, where all the silver is precipitated as sulphide of silver. The other metals will also be precipitated as sulphides. I now pour the produced chlorine-gaswater over the ore and de'cant for a few hours. When there is not enough chlorinegas water on hand, I pass a. current of chlorinegas through the ore and keep it always saturated. This part of the the silver is rapidly convertedinto chloride off The temperntu re should be regulated hydrochloric acid` by passing it through the A few hours willmethod to separate-and precipitate the same. A second washing is now conducted with about i adding sodium sulphide to a sample taken Y can be seen at the lop of'lhe cylinder A bythe roo will dissolve' all the chloridi'zcd lead and cop- IIO reo

process may be greatly facilitated by using the exhauster above described. All of the gold is now converted into chloride of gold, and the remaining silver, Src., is alsoehloridized. I- now wash with hot water, whichtakes. all the Y 5 gold in solution, and pass this solution into the gold-precipitation tank and precipitate in the ordinary manner with ferrous sulphate.- I vnow fuse the residuum and assay. -The washing of the ore in the .cylinder A'should now be carried on with hyposulphite-of-sodium solution and hot water until no precipitate ensues on a sample taken from-the lower end of the `said cylinder. and by using as a test. sodiumsulphide. All ofthe received solution should be'kept separately and precipitated when large quantities are obtained. The cylinder is now emptied. l

If it is advisable to charge the ore before roasting, I useaboutone per cent. of common salt (sodium chloride) in order to hasten the leaching and iiltering process.

Asa matter of convenience iu constructing a plant, I may arrange, say, tive cylinders, A, about a common center equidistant from each other, which arrangement I denominate Aa batteryJ The chlorine-gas apparatus will be located at or near the center.of ,the battery on the lower/*door with the settlers and precipitation-tanks. The other -parfs lof the lar as in. the present case, and also of pro ne: wherein like results are accomplished as by my invention; but I am not aware that v4 j, the particular nature of apparatus or the pax-,

apparatus are on the upper floor, as illustratedV twenty feet in 10.912/` n I f ."3

ticular pr herein resorted to -Have ever heretofore been devised. .l

Having described my invention, I claim- 1. An improved apparatus .for extracting A metals from ores, consisting of a vertical vitre- 5o ous-lined cylinder provided with a iilter at its' bottom andvasieve and removable cover at its top, a chlorine-gas generator, a purifier for this gas, a pipe forming 'a communication between the purifier and the said vessel A, an

exhausting apparatus and its pipe'communicatiug with said cylinder, and settling or decanting tanks. all substantially as described. 2. The upright cylinder A, for the purpose described.'y having a vitreous inner surface, in combination with the bottom liilterand its perforated diaphragm, the'sieve, the removable cover,` and the interior braces, and a pipe provided witharegulatng-cock leading to settlers, substantially. as described. u. 3. The' combination, with the vessel A, having a iilteriug-bottom, a screen, and a removable cover, of a 'discharge-chute provided with a cocker gate, a hot-water tank, and a chlo-v rine-gas generator, substantially as described. 7o 4. The p of vconverting the ,metallic bases contained in ores and metallurgical -p'roducts into chloridized compounds, which consists, first, in charging asuitablje vessel with calcined ore immediately after it is'taken .from a. roasting-furnace; second, subjecting the ore in said vessel to the repeated action of purified chlorinegas forcedJ through the ore, as described; third, passing hot water through the ore; fourth, washingy the ore with about two cent. of hyposul bite-of-sodium solution until no black precip tate appears upon adding sodium sulphide; fth, washing the ore with chlorinegas water, and, sixth, washing the ore-with hot scribed.V

lWituessesi GEORGE F. CULMER,

` ALFRED E. GULMEB.

' AHENRY HIBsCHi-NG.

water, all] substantially as de- `8.5

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