US144185A - Improvement in apparatus for feeding fuel to ore reducing furnaces - Google Patents

Description

Apparatusfor Feeding Fuel to Dr'e-Reducng Furnaces..

ivm-144,185. Patented NovJJSll Fig, i.

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anims II. BOYD, or cHIOAco, ILLINoIs.

IMPROVEMENT IN APPARATUS FOR FEEDING FUEL TO OREREDUCING FURNACES.

`Speeication formingpart of Letters Patent N0. ZLlS, dated November 4, 1873,: application filed October 14, 1873.

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To all whom 'it may concern:

Be it known that I, JAMES H. BOYD, of Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Arrangement and Mechanism for Feeding Fuel to Furnaces for Reducing Orcs, of which the following is a specification:

In furnaces for reducing ores it is necessary that an intense, prolonged, and uniform heat be preserved. The fuel must, therefore, .bc

supplied to the grate continually in small quan tities, and should be always spread or cast over the fire, so as to not check the combustion. what warmed and partially coked before it is fed to the grate, to save damping the fire and to prevent too great an amount of smoke in the reducing-chamber, whichnwould hinder the a small chamber on a level with the grate,

where is placed a trap or valve to regulate the ilow of coal upon this incline, and a rockerarm or grate suspended before the iire and fitted with curved iingers, so actuated by a proper mechanism as to swing with a sudden drop motion toward the hre at intervals, by which means the coal crowding down behind it is thrown at intervals quickly, so as to scatter it across the iire. The chamber, being in close proximity to the tire, serves as a cokingchamber to partially coke the fuel before it` is cast upon the re. i v In the accompanying drawing which forni a part of this specification, Figure l represents a longitudinal vertical section of a reducing-furnace provided with this improved apparatus. Fig. 2 is an end view of the same from the left hand 5 and Fig. 3 is a rear view It is also desirable that the fuel be someof a portion of the same, showing the cam mechanism for operating the throwing-fm gers.

Like letters of reference made use of in the several figures indicate like parts wherever used.

In the said drawing, A represents the firegrate. B is the reducing-chamber. 'llhe other parts of the furnace are shown, as, for example, the roasting and desulphurizing cylinders, but it will not be necessary to describe them. Above the roof or arch C, which covers the grate and reducing-ch amber, is erected a warmair space, D, inclosed by the walls of the fur nace and covered by the inclined way E, the flooring of which may preferably consist of metal. This way E leads down to and empties int-o a small chamber, Gr, which is guarded by the trap or valve Il, swung to a shaft, 71., which is fitted at the back of the furnace with a lever, i, and quadrant j, by Ineans of which saidV trap may be set and held at any point closed or open, or partly open, as the case may require, thus governing the flow ot' the coal into the small cokingchamber G. At the gate or opening between the colting-chamber G and the grate A are swung a number of curved fingers, K, from the rock-shaft k. To the end of this rock-shaft 7.', upon the outside and at the rear of the furnace, is attached a crank piece, m, connected with the vertical bar a by a joint. rlhis vertical bar, bent at the top into the hook or I -piece O, rests upon the periphery of the spiral cam M hung upon the shaft p, and revolved in the direction of the arrow by theageney of the driving-pnl` ley P.

As the cam revolves the rod u and crankpiece m are alternately lifted slowly and caused to drop with a quick motion, causing the fingers K to draw back slowly and return suddenly with a jerk, thus casting the coal in a scattering manner across the grate.

To assist the sudden return motion a weight, a', may be attached to the erank-piece m.

Having thus fully described my invention,

what I claim, and desire to secure by Letters i Patent, is=

l. -The combination and arrangement of the hot-air chamber D above the grate A, and reducng-ehalnber B, the ineline E, eokng-ehaan` K, tmp li', chamber G, inclined Way E, and

ber G, and zn mechanism for casting the fuel mechanism M o n m k i j, substantially as from the chamber G upon jthe grate, snbstm- Specified.

tially as specified. I JAMES H. BOYD.

2. The combination of the Curved ngers K,

shaft 7c, crank-piece on, bar u o, :1nd eam M, 't-nesses:

substantially a-s speeied. JOHN V. MUNDAY,

o. The combination of Jshe curved ngers HEINRICH F. BRUNS.

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