US638099A - Furnace for reducing ores. - Google Patents

Description

No. 638,099. Patented Nov. 28, I899.- L. cunnEAi FURNACE FOR mznu'cms ORES.

(Application filed Jan. 13, 1899.)

(No Model.) 4 Sheets-Sheet l.

iii' a 6 WITNESSES: ,1 3 INVENITOR mg cums FEYERS nu. PHOTO-LITHQ, WASHINGTON. o. c

Patented Nov. 28, I899.

L. COBREA. FURNACE FOR REDUCING OBES.

(Application filed Jan. 13. 1899.)

4 Shaets$haet 2.

(No Model.)

INVENTOR -BY Z S ATTORNEY WITNESSES:

No. 638,099. Patented Nov. 28, I899. L. GDRHEA. FURNACE FOR nzoucma omzs.

(Application filed Jan. 13, 1899.) (No Model.) 4 Sheets-Sheet 3v R Y EL m N R mg M a f Y AAAE No- 638,099. Patented Nov. 28, I899.

L. UURREA' FURNACE FOR REDUCING ORES.

(Application filed m. 13, 1899.)

4 Sheets-8heet 4.

(No Model.)

II I E-I WITNESSES: INVENTOR BY 7 ATTORNEY) Game/17am NITED STATES PATENT FFICE- FURNACE FOR REDUCING ORES.

SPECIFICATION forming part of Letters Patent No. 638,099, dated November 28, 1899. Application filed January 13, 1899. Serial No. 702,014. (No model.)

To a whom it may concern:

Be it known that I, LUIS OORREA, a subject of the King of Spain, residing at LaFelguera, (Oviedo,) Spain, have invented certain new and useful Improvements in Furnaces for Reducing Ores, of which the following is a specification.

This invention relates to furnaces for reducing ores, and particularly lead ores; and it consists in the novel construction of the furnace for carrying out the reduction. furnace, which operates with gas, is especially adapted for economizing heat.

The construction of the furnace will be described with reference to the accompanying drawings, wherein an embodiment thereofis illustrated. v

In the drawings, Figure l is a vertical axial section of the furnace in substantially the plane indicated by the linerin Figs. 2, 4, and 6. Fig. 2 is a horizontal section in substantially the plane indicated by the line 00 in Fig. 1. Fig. 3 is a vertical axial section of the furnace, taken in substantially the plane indicated by the line in Figs. 2, 4, and 6. Fig. 4 is a horizontal section taken substantially in the plane of the line 00 in Fig. 3. Fig. 5 is a vertical axial section of the furnace in substantially the plane of the line m in Figs. 2, 4, and 6. Fig. 6 is a horizontal section in substantially the plane of the line w in Fig. 5. Fig. 7 is avertical axialsection of the furnace, taken in the plane indicated by line 09 in Figs. 2, 4, and 6. Fig. Bis a vertical axial section of the furnace, taken in the plane indicated by the line 00 in Figs. 2, 4, and 6. Fig. 9 is a fragmentary plan view of the burner K and adjacent parts.

The furnace is circular in plan, as herein shown, and sunk part way in the ground. These features, however, are not absolutely essential features of the construction. The outer circular Wall Xis surmounted bya conical roof E, at the apex of which is a louver G to admit air. V is the smelting or reduction chamber or laboratory, which has an arched roof to and a massive bed or hearth O, composed of clay, lime, and coke-dust mixed and well tamped. This hearth O is formed with a hollowor depression at the center to collect the molten metal, as lead, and from this depression a channel leads the lead to a The vertical conduit or well P, formed in the mass of the hearth O, and from this well the lead flows continuously out to an exteriorly-situated well Q, from which it is taken and cast into ingots orpigs. In the wall of the chamber W, at the sides, are charging-doors a, and in the front is a door I) for the removal of the scoria. Over the center of the chamber W is the burner K, the operation of which will be hereinafter described. The fumes from the chamber W pass down through conduits A in the wall X, Fig. 5,to the fume-chamber M, Fig. 6,fron1 whence they flow by a conduit B to the condensing gallery and chimney. shown.)

(Not I The fume-chamber M is separated from a hot-air chamber N next above it, Fig. 4, by an arched roof m, and the hot-air chamber is separated from the smelting-chamber WV by a strong arched roof or, which supports the hearth O.

The air entering the louver G flows down to the hot-airchamberN through air-lines E, Figs. 3 and 4, formed in the walls, and the heated air from this chamber N flows up to the bu rner K by way of a horizontal conduit H, an upright conduit I, and acurved connecting-trunk J, (see plan, Fig. 9,) which communicates with the burner K by an inlet. Here the hot air meets and mingles with gas from a holder or generator, this gas flowing to the burner K by way of a gas-conduit R, a pipe S, and a curved connecting-trunk T, Fig. 7, which communicates with the burner K by an inlet.

The hot-air conduit H, Fig. 4, and the fume conduit B, Fig. 6,both extend into or near to the centers of their respective chambers, so as to receive the gases from the centerof the mass in the chamber.

In the fume conduit or fine B draft-regu:

lating devices 0 and D, Figs. 2, 4, and 8, are provided. These are well-known devices and will need no special description. The gasconduit R also connects with the flue B near the point where the register D is situated, Fig. 4, and has in it a valve or slide U. The object of this construction is to allow the gas to pass to the chimney instead of to the furnace under certain conditions. The upright conduit I and the upright gas-conduit S will be provided with cut-offs or dampers of the usual kind. The damper i in the conduit I is seen in Figs. 2 and 7, and the damper s in the conduit S is seen in Figs. 2 and 3.

To operate the furnace, itis essential to first heat the chamber W. To do this, the air and gas are admitted to the burner K, which opens into the top of said chamber, and the mixture of air and gas is then ignited. The flames fill the smelting-chamber and heat it thoroughly. When the chamber W has been thus properly heated, the charge of ore, (as lead ore,) fluxing material, and coal is placed therein, the openings closed, and the heatincreased. The mass fuses, the ore is gradually reduced, and the lead flows by way of the well Pand the connecting-conduit to the well Q, from which it is dipped or drawn. The scoria floats on the molten mass, and when the lead has been separated and freed from the scoria the latteris removed at the doorb. The furnace is then recharged as before and the operation repeated. Practically the charges follow each other closely and the operation is substantially continuous.

Having thus described my invention, I claim- 1. A gas-furnace for reducing ores, comprising four superposed chambers, namely, an air-receiving chamber, next below this air-receiving chamber, a smelting-chamber having a hearth, and a burner for gas and air in its upper part, next below the smelting-chamber, a hot-air chamber, connected by fines with the air-receiving chamber and with said burner, and next below the hot-air chamber a fume-chamber, connected with the smelting-chamber and with thefumeoutlet, substantially as set forth.

2. A gas-furnace for red ucing the ores on a hearth, comprising a smelting-chamber W, with a heart-h, an air-heating chamber N, nextbelow the chamber 7, a fume-chamber M, next below the chamber N, and connecting with the smelting-chamber and the fumeoutlet, and aburner K, open to the upper part of the smelting-chamber, said furnace having also an air-space above the smeltingchamber, air-fiues connecting said space with the chamber N, and a hot-air pipe I, connecting said chamber N with the burner K, substantially as set forth.

In witness whereof I have hereunto signed my name, this 18th day of December, 1898, in the presence of two subscribing witnesses.

LUIS CORREA.

Witnesses:

LEON PEDRO I-IEREREs, .TosE PEDESTRALSEZ.

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