US219763A - Improvement in gre-furnaces - Google Patents

Description

G. W. BEAMER 8a E. AANDERSON. Ore-Furnace.

No. 219,763. Patented sept. 1.6.1879.

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Witnesses,

UNITED GEORGE W. REAMER AND EDWARD' ANDERSON, OF FOREST HIDE, GAL.

IM PROVEMEN'F` IN f ORE- FUR-NACES.

i Specification forming part of Letters Patent No 219,763, datedl September 16, 1879.; application filed May 7,' 1879.

ITo all whom it may concern:

Be it known thatwe, GEORGE W. BEAMER and EDWARD ANDERSON, of Forest Hill,

countyof Placer, andState of California, have invented an Ore-Furnace; and we hereby` de# Glare the followiugto be a full, clear, and exact. description thereof, referencebeing had tothe.A

accompanying drawings.

Our invention relates to an improvedfurnace for roasting and desulphurizing ores, and.

it is more particularly intended for working the ores of mercury, the fumesof whichnare to be caught and conveyed to condensers.-y It4 is specially constructed to roast tin-e ores,.wh.ich, in ordinary furnaces, areapt to clog or liable to `pack in such anlanner that the fire hasnot free access to `all the particles.

It consists in constructing a ycentral chamber.

between vertical walls, on the outersidect' eachof which is a lire-place, the draftsfrom the two fire-places passing in opposite direc.-Y

. tions and meeting in a common flue, wherev each wall is arranged a fire-place, which heatsy the ore in the space" between the walls. The two fire-places are placed in opposite sides of the furnace 5 but the products of combustion finally enter a common chamber or ilue, as hereinafter described. The lire-place B has the usual doors and grate-bars, and the heat, dame, and products of combustion are carried through the liue C to the side opposite the grate, and then rise to another iiue, leading them back again toward and over the grate. A series of alternate diaphragms, D, are arranged one above another, so as to form a continuous ue, the openings in the diaphragms being at alternate ends. In this waythe heat and flame are carried to the top, being in contact with the walls A during their passage, so as to thoroughly heat said walls and the ore between them. The same arrangement of llues is made foreach fireplace, the only difference being that one has one more diaphragm than the other, so that the heat is lally discharged from both into one chamber, E, on one side of the furnace.

Leading from the chamberE and passing across the space I between thewalls A sa pipe, E, madein apeculianform. `This pipeF is openen its under side, Where. it ,crosses the furnace, and two flanges,l G, project downward necting with the. furnace-chamberl, in which the ore is: roasted. A series Vof openings, K, are formedin thewalls A, connectingwith each flue, for the purpose hereinafterfdescribed..

The operation of our furnaceis as follows: The ore is poured into the chambenI through the opening in the top until. said' chamber` is filled to the top and acrossV the pipefF.` rEhe ore then-rests: on the loorv H, butdoes not descend until moved with a rake v underneath.

When the -res are started .up the heat, flame, andproducts of combustionpass to. and fro in thefluesoutside the walls A. Acertain amount o-'lheat is also communicated to: the orethrough theopenings K in said walls. These openings are made inclined downward .from theilues to the chamber I, so that no ore will enter the tlues om the chamber.

As the ore gradually becomes heated and the mercury is volatilized the fumes rise through the ore and are caught in the pipe at the top of the chamber. The openings K, however, also furnish passages through which the fumes may rise from the ore into the iiues, and thence be directed into the chamber, where the dues terminate, and thence into the pipe which leads themto the condenser.

From the construction described'it will be seen that all the heat, flame, smoke, and volatile products are carried to the condenser-pipe whether they rise through the ore or enter th flues through the openings. y

rIhe ore is fed in and withdrawn continuously. As the ore is discharged atthe bottom, the openings for the discharge-how are made of just the size of a car, and Whenfthe door is opened the ore may be withdrawn into the car and carried away. 1

This really forms a double reverberatory furnace. By having the fires on opposite sides the heat is distributed evenly, and the chamber l perfectly heated. The ore is gradually heated from top to bottom, the more volatile products being first freed, and the ore left in proper condition for thorough roasting. Asit is heated gradually on its downward passage to the points of greatest heat, the operation of roasting is thoroughly' performed.

Any desired amount of time may be given to the roasting, according to the class of ore, this being determined by the rapidity of removal of the ore from below. No Scrapers or stirrers are needed, the vertical stratum of ore being operated on being so thin and small as to insure thorough roasting, and there being no projections or places on the walls A on which the ore may lodge.

If desired, the draft may be shut oft on one side, and the fumes drawnoli' through theopenings K from one side only. It is preferred, however, to draw the fumes from both sides of the body of the ore as soon as they are pro duced, and this we accomplish by means oi the openings herein described. A current can be created in either direction desired by regulating the draft.

It will be seen that all the heat is utilized ou the ore in the central chamber. There are n0 downward currents for the draft, as it passes alternately back and forth from one side of the furnace to the other beside the walls A 1n this way iine ore, such as all quicksilver-mines produce, is easily worked.

It is customary to make tierras or bricks of this class of ore, in order to reduce it properly; but we ohviate the necessity of this by our improved construction. The ore is, at all points of its downward passage, in contact with the heated walls, and there are numerous openings through which the fumes may escape to the condensers. At the outer end of the pipe F is an ordinary suction-blower, which draws oli' the fumes to the condenser.

This furnace is cheaply constructed and operated, and may be easily examined, if necessary. at any time. There are no iron parts in the structure, except the condensing-pipe F, which is easily replaced when worn out. This can, however, if desired, be made of cement or clay, and be suitably supported in position without danger of breakage. Thisfuruace will also be useful for roasting sulphurets, which, after being concentrated, are diicult to work in ordinary furnaces, since they easily .clog or pack, and are free from lumps, packing so closely as not to be easily handled or roasted.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In an ore-roasting furnace, a central roastingchamber, I, in combination with two {ireplaces, B B, located in diagonal corners of the base and communicating with two sets of fines, arranged on opposite sides of the roastingchamber, so that the drafts from the re-places rise in oppositely-nmving currents along the sides of said chamber I, substantially as set forth.

2. The orc-chamber I, between the walls A, and having the pipe F, with its downward projecting flanges G, in combination with the dre-place B, dues C, with their perforations K, and common chamber E, whereby the heat, dame, products of combustion, and volatile products of the ore may be caught bythe saine pipe and led to the condenser, substantially as herein described.

In witness whereof we have hereunto set our hands. f

GEO. W. BEAMER. E. ANDERSON.

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