US243850A - claek - Google Patents

Description

Patented July 5, 1881.

S. G. CLARK.

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(No Model.)

FURNACE FOR THE REDUCTION OPZING, GINNABAR AND OTHER ORES.

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* UNITED STATES PATENT OFFICE.

SAMUEL G. CLARK, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO MORITZ M. FREED, OF ST. LOUIS, MISSOURI.

FURNACE FOR THE REDUCTION OF ZINC, CINNABAR, AND OTHER ORES.

SPECIFICATION forming part of Letters Patent No. 243,850, dated July 5, 1881.

' Application filed March 22, 1881. (No model.)

To all whom it may concern Be it known that 1, SAMUEL G. CLARK, of the city of Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Furnaces for the Reduction of Zinc, Cinnabar, and other Ores, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

In the drawings, Figure 1 is an axial section through the apparatus. Fig. 2 is a detail axial section at right angles to the section shown in Fig. 1. Fig. 3 is a horizontal section at y Fig. 1. v

A is the ash-pit; B, the heating-furnace, and O is the reverberatory chamber or furnace.

D is the bridge-wall, and E is the reverberatory dome or arch.

F is a flue leading from the furnace B G to the annular flue G, which extends upward between the retort and flue-stack.

The retort or crucible is shown at H and the flue-stack at I.

Extending inwardly from the flue-stack are bricks or other projections 2', that serve as side supports to the retort, the outside of the retort being in contact, or nearly in contact, with the projections when it is expanded by heat.

J is the base of the flue-stack containing a cinder-chamber, N, across whose top an arch, K, is thrown, that forms the support of the retort.

L is a rake-hole at the lower end of the retort. Through the hole L the spent ore may be drawn out from time to time as a portion at the bottom is divested of metal. To give access to the rake-hole 'L the door L is opened. Except when raking out spent ore from the retort the rake-hole 'L and door L are closed. As the material is raked from the retort it falls through the chute M into the hot chamber N in the base of the furnace.

0 is a door through which the refuse may be drawn out of chamber N. The upper part of the chamber N has a very high temperature from its proximity to the furnace B O and flue I F, so that if any metal should have escaped vaporization in the retort it shall be eliminated in the chamber N The retort may be made of the same refractory material from top to bottom-say of fireclay; but I prefer to make the parts of the retort ot'ditlerent material, varying in capacity to resist injury from heat. For instance, the lower part may be of graphite or other crucible material, the central part of fire-clay, and the upper part ofcast or wrought iron. I show the retort or crucible as formed in tubular sec tions made with a tight joint between them.

The flue-stack has a removable top, I, to allow the sections of which the retort is composed'to be taken out upwardly.

At P are shown ducts for the escape of metallic vapor from the interior of the retort int-o condensing-pipes Q, whose lower ends lead to the metal-receiver B. By supplying air to-the interior of the pipes Q combustion would take place at the mouths of the ducts P (where they communicate with thepipes Q) and oxide would be condensed and deposited in the condensingchamber. The upper ends of the pipes Q, enter the upper portion of the condensing-chainber S, and the vapor on entering said chamber descends on one side of the vertical partition T, and passing beneath the lower edge of the partition ascends on the other side of the same, as shown by heavy arrows, to a suction-pipe, U, at the top of chamber S. The suction-current in the pipe Uis caused by a steam-jet, V, regulated by a valve, '0. The suction-pipe U leads into another condensingchamber, S, where the vapors are subjected to the action of mingled steam and watery spray from a water and steam jet, W, the Water and steam pipes being provided, respectively, with valves or cocks w and w. The vapors descend in the chamber S on one side of the partition T and ascend at the other side of the partition, and the unconden sed gases escape through the vent X into the open air. The products of combustion, 850., from the reverberatory furnace B O and any metallic vapors that may arise from the chamber N ascend in the annular flue G and escape through a pipe, Y, whose end dis charges into the condensing-chamber S. The steam and water jet W is set in the discharg= ing-end of the pipe Y, so as to induce a current therein and draw the vapors from the upper part of the flue-stack, It will be seen that any metallic vapors arising from the chamber N will be condensed in the chamber S.

At 0 are doors through which metal or oxide is removed from the receptacle R and the condensing-chamber S and S.

Z is an overflow U-formed pipe discharging through a cup, Z, upon the outside ofthe chamber. The top of the cup is at sufficient altitude to prevent the escape of gas through the U-formed pipe.

The retort, the flue-stack, and the annular flue are shown of circular form; but I do not confine myself to this shape, for the form may be varied without essentially changing the principle of operation.

Theoperation is as follows; In the treatment of zinc, cinnabar, and other ores the retort is filled at the door H in the upper part of the same, and all means of escape from the retort, except through the ducts P, tightly closed, and the furnace B O is put in operation. The products of combustion from the furnace ascending through the annular flue G will heat the retort and cause the metallic vapors to escape therefrom through the ducts or cones P into the pipes Q, where the vapors condensing run down the pipes in a liquid or solid form into receptacle R. The uncondensed vapors escape from the pipes Q into the condensingchamber S, and in like manner vapors escaping condensation in the chamber S pass into the condensing-chamber S, where the metallic vapor is condensed and is deposited in the bottom of the chamber. Air may be admitted to the pipes Q to cause the oxidation of the zinc vapors on issuing from the ducts P into the pipes Q. When the metal has been eliminated from the ore in the lower part of the retort the rake-hole L anddoor L are opened and the spent ore raked out from the bottom of the retort into the chute M, through which it passes into the receptacle or chamber N, in which (should there be any metal remaining in the ore) the same is vaporized, and escapes through the passage M, annular flue G, and pipe Y to of the atmosphere, so that there is no escape of vapor from the charging-hole H when it is opened for the introduction of ore. This is a feature of great importance, as it prevents injury to the health of operatives from the in-' halation of arsenical and other injurious vapors.

In anotherapplication of even date herewith I claim the combination of a reverberatory furnace provided with a flue and chute, a crucible or retort, and surrounding stack, with flue interposed between, in communication with the chute or flue, as herein shown.

I claim as my invention- 1. The combination of retort H and stack I, provided With ducts P, flueG, condensing pipes or chambers Q, and chambers SS, with connecting-pipe U, for the purpose set forth.

2. The combination of retort H and stack I, provided with ducts P, flue G, condensing pipe or pipes Q, and chambers S S, with connecting-pipe U, provided with a jet, V, for the purpose set forth.

3. The combination of furnace 'B, flue Gr, retort H, stack I, and ducts P, connecting the inside of the retort to condensing pipes or ch ambers without the stack.

4. "The combination of furnace B, flues F G, stack I, retort H, chamber N, connected to flue G, vapor-duct Y,jet W, and condensing chambcr S.

5. The combination of reverberatoryfurnacc B O, flues F G, retort H, stack I,,duct Y,jet WV, and condensing-chamber S.

SAMUEL G. CLARK.

Witnesses:

SAML. KNIGHT, GEo. H. KNIGHT.

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