US1149495A - Metallurgical furnace. - Google Patents

Description

G. C. CARSON.

METALLURGICAL FURNACE.

APPLICATION FILED 1AN.15,1907.

Patented Aug. 10, 1915.

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GEORGE CAMPBELL CARSON, OF DENVER, COLORADO. v

METALLURGICAL FURNACE.

To all whom it may concern.'

Be it known that I, GEORGE CAMPBELL CARSON, of Denver, Colorado, have invented certain new and useful Improvements in Metallurgical Furnaces, whereof the following is a specification.

My invention relates to furnaces for treating molten metals and smelting ores, such,

A for example, asv reverberatory and open hearth furnaces, in which the materials and products are likely to attack the linings of the furnace. l

In carrying .out my invention I arrange receptacles contiguous to the furnace, and communicating-with its interior, preferably along the sides, in which receptacles I place refractory materials or ores adapted to protect the furnace. These materials pass by gravity into the furnace and form a border or levee resting on the hearth and against the walls of the furnace, and act as an inside lining to protect the same from scorification and erosion by the bath, and also from the high temperatureof the interior of the furnace.

Prior to my invention it was customary to form such a levee' or insidel lining by throwing refractory material through doors and across the furnace against the wall on the opposite side. This is very exhausting work -for the laborers to perform;

moreover some of the refractory materialso thrown does not reaclr its destination, but.

falls into the bath. This material is not only wasted, but is a positive detriment as it must be eliminated" by the process, which requires heat, consumes fluxes, absorbs metal from the bath, and adds to vthe slag volume. All of these objections are avoided by my invention. Other savings-due to my invention are, the timeilost in ordinary practice in repairing linings by hand, which it is customaryto do after each heat or skim, and which requires severalminutes to perform; also the cooling of the furnace and loss of heat when the doors are opened 'to throw in the refractory material.

By my inventionthe lhard brutal labor of claying up is saved. .The only refractory material lost is thaty which is dissolved from the border by the bath. The timelost in repairing linings is saved. The heat lost while repairs are being made is saved. The metal iuxed and lost by reason of therefractory material falling into the bath and ,never serving its purpose, is saved.

" Specication of Letters Patent. v

Ishowing a furnace built with through the orifices.

Patented Aug. 10, 19155 Application led January 15, 1907. Serial N o. 352,468.

Also, 1n reverberatory practice,

the refractory substances fed in to protect the walls of the furnace, are under the control of the metallurgist, and ideal smelting charges can be fed, and the portion next to the furnace Wall never reach the point of fusion while that portion in the interior of the furnace will be in a high state of fusion. Furthermore, in some cases, it will be unnecessary to build the furnace Valls with brick, as the refractory material can rest against plates held in place by steel beams,v` which may.l also support the roof.

' For further explanation of my invention away with the expense of pur- I refer to the accompanying drawings, in

which l Figure 1 is a cross sectionof a furnace taken through the passages for refractory `material, and showing brick walls for the furnace. Fig. 2 is a similarsection, but v steel plates and without brick walls. Fig. 3 is a longitudinal section of a furnace, and shows the orifices .through which the refractory ma# terial is fed.

In these figures 1 represents the walls of l the furnace, built of brick, as in Fig. 1, or of steel plates 1A as in Fig. 2.

2 is the arched roof of the furnace.

3 is the' bath of material undergoing treatment. a

4 represents a series of receptacles ranged along the sides of the furnace, and containing the protecting or refractory material 5,

which passes into the interior of the furnace .through the orifices 6, and forms the protective coating 7 against the walls and on the bottom. The quantity of material 5 in the receptacles is not important, save that there must be sufficient weight to force it into thev furnace and deliver it to th desired points with desirable lrapidity. rl`he material should be dry enough not to stick or clog, and sufficiently fine to descend freely 8, 9,10 are the usualbeams and ties which form the skeleton of the furnace, and need not be further described. A

l2 vare holes` through which a bar may be .inserted to loosen any material which be- 15 are gates orI dampers to control the,

How of the refractory material through the feed orifices 6.

In the furnace shown in Fig. 2 I have shown Water cooled sections 16 at the ends of the roof arch. These are dsirable Where ores, or basic materials are fed through the orifices 6, as such materials would otherwise attack the bricks of the roof. By supporting the roof o n brackets secured to the framework of the furnace I avoid the damage caused by the Working of the brick Walls under the influence of the changes of temperature, as Well as the injury to them from the strain when they are at a high temperature.

In the manufacture of steel; and in some other operations, I divide the hearth into two compartments, as at 17 in Fig. 3, and

line one end With basic and the other end Withi acid materials. I also arrange a bridgef18 near the division point. I can thls feed an acid iron, for example, into oneeend and there desiliconize it, and then pass it through the bridge to the other end Where it is dephosphorized. I thus effect great savings in refractory material vand alvoidiilling the hearth with a voluminous s ag. l

Having thus described an embodiment of my invention and believing that If have produced novel and valuable improvements in the art to which it pertains, I.claim:-

In ametallurgical furnace having receptacles arranged above the roof thereof, passages from said receptacles leading to said furnaces arranged in such a manner that the material in said receptacles passes out into said furnace by gravity and form the lining thereof.

GEO. CAMPBELL CARSON.

Witnesses:

ELMEn E. MEADE, HARRY ALLEN.

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