US571250A

US571250A - Metallurgical furnace

Info

Publication number: US571250A
Authority: US
Publication date: 1896-11-10
Anticipated expiration: 1913-11-10

Description

2 Sheets-Sheet 1.

(No Model.)

B. TALBOT. METALLURGIGAL FURNACE.

Patented Nov. 10, 1896.

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TH: mums PETERS o0. FHOTO-LITNQ, WASRINOTOM (No Model.) 2 sheets-s eet 2.

B. TALBOT. METALLURGICAL FURNACE.

No. 571,250. Patentd Nov. 10, 1896.

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METALLURGICAL FURNACE.

SPECIFICATION forming part of Letters Patent No. 571,250, dated November 10,1896.

Application filed April 14, 1896.

.To all whom it may concern.-

Be it known that I, BENJAMIN TALBOT, a subject of the Queen of Great Britain and Ireland, and a resident of Pencoyd, Montgomery county, Pennsylvania, have invented certain Improvements in Metallurgical Furnaces, of which the following is a specification.

My invention consists of certain improve ments in continuous heating-furnaces, the usual construction of such furnaces being such that the material to. be heated is introduced at or near one end of the furnace and removed at or near the other end, the products of combustion entering the furnace at that end from which the charge is removed and escaping from the furnace at the charging end.

One object of my invention is to so combine regenerators with such a continuous f urnace that the air may be properly heated for admixture with .the incoming gases, and a further object is to provide the furnace with a more durable bottom orbed than that usually employed. These objects I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1 is a longitudinal section of a heating-furnace constructed in accordance with my invention. Fig. 2 is a transverse section of the same, on an enlarged scale, 011 the line 2 2, Fig. 1. Fig. 3 is a similarly-enlarged transverse section on the line 3 3, Fig. 1; and Fig. 4 is a transverse section on the line 4: 4:, Fig. l.

The furnace itself may be constructed in any ordinary manner, that shown in the drawings consisting of a structure A, partly inclined and partly straight, the forward or charging end being highest, and having a doorway a, which when uncovered permits of the introduction of the ingots, bars, or other forms of metal to be heated, the charge being forced along on the bed of the furnace as each new addition is made thereto, and the heated bars, ingots, or other objects being finally withdrawn through any desired number of lateral delivery-openings b, appropriately located near the rear end of the furnace.

At its rear end the furnace communicates, through an opening (Z and a flue d, with a gasproducer B of any desired character, and also through openings f with a transverse cham- Serial No. 587,453. (No model.)

berf, which is in communication, through short necks 9 with the rear ends of longitudinal fiues g g beneath the furnace, these fines being in communication at their forward ends with chambers D D, respectively, and these chambers containing the usual brick checkerwork or other heat absorbing and distributing structures.

The chambers D D communicate, respectively, at their rear ends with fines F F be neath the same, and each of said flues F F communicates at its forward end through a neck h with a casing G, containing a valve t', by the adjustment of which the flue F may be placed in communication with the air and the flue F with a discharge-flue H, leading to the stack, as shown in Fig. 4:, or vice versa.

The products of combustion escape from the forward end of the heating-chamber of the furnace through side flues m, which unite in a transverse flue n beneath the forward end of the furnace, said flue n communicating through necks p p with the forward ends of the regenerating-chambers D D. The flow through each of the necks g 19, and p is controlled by a valve 5, of any desired character, the preferable form of valve being a sliding water-cooled valve having a water-cooled seat. Instead of using an independent valve for each neck I may use a single valve, such, for instance, as the valve 2', (shown in Fig. 4,) for controlling the flow through both necks. It will be seen that by proper adjustment of these valves and of the valve 1' in the casing G the products of combustion from the furnace on their way to the stack may becaused to pass rearwar'dly through either of the regenerating-chambers D D, while at the same time air is passing forwardly through the other regenerating chamber, and thence through one of the flues g or g, one of the necks 9 the chamber f, and openings f for admixture with the gases entering the furnace from the producer, the valves being so manipulated that the regenerators are used alternately as absorbers and distribute-rs of heat.

A partition I, of fire-brick, tile, or other refractory material, forms part of the bottom of each flue g g and extends so far forward that the air is compelled to traverse each regenerative chamber D or D to the forward end of the same before it can enter the flue g or thereby providing for the effective heating of said air before its admixture with the gases.

Sight-holes t are formed in the sides of the furnace at intervals, so that the contents of the heating-chamber may be readily inspected.

I provide the heating-chamber of the furnace with a composite bed or bottom, that is to say, that portion x of the bed or bottom of the furnace at and near the delivery end of the same is of ordinary basic or neutral lining material, while that portion 00 of the bed or bottom of the furnace in the forward portion of the latter is of any ordinary acid lining material.

The provision of the furnace with a bed or bottom of basic material throughout is inadvisable, because the heat of the furnace at the forward or charging end is not usually sufficient 'to properly form a bottom of basic material, (by forming being meant the setting, hardening, or glazing of the basic material,) while, on the other hand, the use of an acid bottom throughout is inadvisable because of the fluxing of the same by combination with oXid of iron from the metal charge when subjected to high heat such as prevails at that end of the furnace where the gases enter the same. By making the bed or bottom of the furnace partly acid and partly basic or neutral, however, I overcome both of the objections noted.

Although I have shown the regenerators as being located beneath the furnace, and although such location is preferable, it is not essential to the proper carrying out of my invention.

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. The combination of a regenerative furnace having inlets and outlets so disposed that the heating-gases always pass through it in the same direction, a gas-generator in communication with the inlet end of the furnace, a pair of regenerators, a pair of valved regeneratonoutlets, in communication with the inlet end of the furnace, lateral outlets at the discharge end of the furnace, a transverse chamber beneath the end of the furnace and in communication with saidlateral outlets, and valved necks between said chamber and the regenerators, substantially as specified.

2. A metallurgicalfurnace having a bed or bottom composed partly of basic or neutral material and partly of acid material, the basic or neutral material being disposed at and near that end of the furnace where the heatinggases enter the same, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

BENJAMIN TALBOT. lVitnesses:

J 0s. H. KLEIN, F. E. BEcHToLn.