US107600A - Terials - Google Patents

Description

1%. 107,600. PATENTBD SEPT. 20, 1870. H A;DUVALL;

APPABATUSFOR ROASIING AND DRYING ORBS AND OTHER MATERIALS.

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No. 107,600. PATENTED SEPT. 20, 1870.

. I A. DUVALL. APPARATUS oa ROASTING AND DRYING ORES AND OTHER MATERIALS.

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ALFRED DUVALL, or BALTIMORE, MARYLAND.

Letters Patent No. 107,600, dated September 20, 1870; antellated September 12, 187 O,

IMPROVEMENT IN. .APPARATUS FOR ROAS'IING- AND 'DRYIKG- ORE-S AND OTHER MA- TERIALS.

The Schedule referred to in these Letters Patent and making part of the same.

the following is a full, clear, and exact description thereof, reference being had to the annexed drawing making a part of this specification, in which- Figure 1 is a cross-section in elevation; Figure 2, a plan of the covering; Figure 3, a horizontal section on the line X, fig. 1; Figure 4, a plan of the bottom of the revolving section of a hollow sphere, showing the flights or vanes; and

Figure 5', a plan of journal-box, showing openingswith valves. V

The same letters are used in all the figures to indicate the identical parts.

M y invention relates to desulphurizing ores, drying grain, and other analogous uses;

My invention consists in a section. of a hollow sphere, hollow cone, or plain disk, (fastened on a hollow or solid vertical shaft,) revolving withina stationary vertical cylinder of iron, fire-clay, or other suit-able niaterial, and surrounding which cylinder isan outer casing, of fire-brick, or other suitable material, rest 'ing on the same base, and rising to the same horizontal plane with the inner cylinder, and being built around the inner cylinder at a proper distance from the same, thereby forming a flue aroundthe inner cylinder, and having a fire-place in the flue thus formed,

on a line of a tangent from -theinner side ofthe outer casing and the outside of the inner cylinder. The furnace and flue thus formed are covered with iron, or other suitable material, having an escape for smoke. The inner cylinder has also a tight covering, with a charging-funnel, with a stopper. or valve, and also an escape-pipe, for conducting off the gaseous matter to be utilized or discharged. The'heating or dryingmay he done by forcing inheated air. through a hollow shaft, or into the chamber under the revolving section of a hollow sphere or disk. 4

A further and more full description will be had by referring .to the following description and accompanying drawing with letters of reference thereon.'

A is a frame-work of iron, or structure of brickwork, supporthig the bed-plate B, which is of iron or fire-clay, and on which rests the cylinder 0; also, the outer cylinder or casing of brick-work D, forming the flue E, having a furnace or firing-placewith grate-bars.

at F.

G is a section of a hollow sphere, within the cylinder O, fastened on and revolving with the "shaft H, which shaft may be either hollow or solid.

The section of a hollow sphere, G, is made with flights or vanes on the under side, for the purpose of keeping up or throwing up, by centrifugal force and.

and a blast of air, any fine particles that might fall, through between the periphery of the section of a hollow sphere, G, and the cylinder 0. It is intended to' work the revolvingsection of a hollow sphere as close as'practicable to the cylinder 0.-

lVhen'operating on material of great specific gravity, a pressure-blast of'hot or cold air may be admitted into the chamber I,:.under the revolving section of a hollow sphere,

hen the shaft H is hollow, a blast of hot or cold air may be admitted through the same into the cylinder 0, under the guardrplate J, and between the vanes K, which guard-plate J and vanes K are fastened to the revolving section of a hollow sphere, G, thereby forming a fan, for the equable distribution of the blast in the chamber formed by the cylinder 0. There are also openings in the section of a hollow sphere, G, near the shaft H, by which air is admitted into and through the fan J K.

The journal-box L, through which the upper part of the shaft H revolves, is made with a flange with openings and valves, as shown by fig. 5, andwhich flange is fastened to the bottom of the bed-plate 13, thereby forming the chamber 1-.

f 1 In the cover of the tide E is a smoke-stack at M.

In the center of the covering of the cylinder O is a charging-funnel, N, with a valve orstopper, through. which the material to,be operated on-is charged into the-chamber (J, falling on the guard-plate -J Also, in the covering of the cylinder 0, at 0, there is an,

escape-pipe, throughwhich the gases, generated in the cylinder 0, are passed oil, to be utilized or dis.- charged.

Within the cylinder 0 is a cover, P, with an open ing in the center,"the object of which cover is-to prevent, when desulphurizing ores, the finer particles from passing oii too readily into the gas-escape.

' Q is aguide-piece, fastened to the cylinder 0, and extending into the chamber 0, .and rising from the section of a hollow sphere, G, to the cover P,ithe object of which guide-pieceQ is to throw back, or partially throw back, to thecenterof the revolving section .of a'hollow sphere, G, the material being treated.

At R in the cylinder 0 is a discharge-gate or valve,

opening into the discharge-spout S, which valve is in tended to be tightly fitted, and may be operated by hand, by a lever, or by means of a screw, or two screws geared together, why an automatic arrangement of a'screw I and screw-wheel, in connection with a combination of levers, springs, and catches, so as to open periodically and quickly, and to remain open a stated time, and

then to close instantly; and the same combination may be used to open and close the valve in the chargingfnnnel N. v

T is a beveled gear, for communicating motion to the shaft H, or motion may be communicated to the same by any convenient arrangement.

Operation.

A fire being built in the furnace F, and raising the heat to the desired temperature in the cylinder 0, (or such temperature being obtained by the forcing in of heated air,) motion is communicated to the shaft H, which causes the sect-ion of a hollow sphere, G, to revolve at such speed as desired. Then the materialto be operated 011 is charged through the funnel N, and, falling on the guard-plate J of the section of a hollow sphere, G,.is thrown out, by the centrifugal force generated by the revolutions of said section G, to the sides of the cylinder (3. The curvature of the upper side of the section of a hollow sphere, G, is made so that when the material is thrown out to the sides of the cylinder 0, it will strike at an angle of waste about forty-five degrees, thereby tending to raise the material higher and in a thinner strata, as it is Cill'- t ried around against the sides of the cylinder 0 by centrifugal force, and comes in contact with the guidei piece Q, by the reaction against which itis thrown nearly or quite back to the center, to go over and over again the same operation, whereby the particles are being constantly separated in their revolutions. \Vhen the matter being treated is sufliciently operated on, the discharge-gate R is opened, and, by the operation of centrifiigal force, the material operated upon is thrown out.- Thesame operation described is then repeated indefinitely.

What I claim as my invention, and desire to secure by Letters Patent, is-- The combination for the purposes intended, as substantially set forth in the aforegoing specification, and shown by the accompanying drawing, or any modification thcreof, involving the same general principles of construction and operation.

ALFRED DUVALL.

Witnesses: V

LEONIDAS DUVALL, A. Lnsnm DUVALL.

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