US875801A - Construction of induction electric furnaces. - Google Patents

Description

PIATEENTED JAN. *7, 1908.-

G. GIN. CONSTRUCTION OF INDUCTION ELECTRIC FURNACES.

APYLIGA T ION FILED MAY 3, 1906.

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FRANCE.

' Patented Jan. 7, 190B.

,iloplicetion filcd May :8, 19906, Serial No. 315023:

uniform distinction of heel; and uniform reactions in different partsof the furnscc on account of the smell calorific conductivity and slow diffusloility of molten substances. A much more satisfactory effect me-y be obmined by the employmenl'. of means for. re-

ducing a. conlzinubus circulation of the mo ten materials in the furnace, thereby causing of thorouglrnixing of all their pcrtlcles'and consiacncly renewing their contact surfaces with the reactive a ones employed. circulation may be c )tained by forming rho channel crucible of a succession of open channels or receptacles, the bottom cl"- each being lorwitudinally sloping, and M connecting t ese channels or reccptec cs by means of laterally closed conduits connecting the deep end of each channel with the shallow portion of the adjacent channel.

T he Joule ellect which varies in an inverse ratio with the section of rho-molten mass is less intense in the deep portion of lBlIG open channels, As the two lrquid masses which communicate through closed conduits have different, densities on account of the (linen encc in temperatures, an upward n1ovement of the liquid molecules in the closed channels is "produced. This displacement is still further reinforccd by the nesting in the conduit" itself. From these partial dislaccments a general and continuous circa-- otion results throughout the whole moltcn moss filling the channels.

In the drawing, in which like reference numerals lIld'lCtLlZG corres onding parts, Fig ures land 2 are respectively VQll-lfi l and horn zontal sectional views of c orocible con-- structed in accordance with my invention, Fig. 1 being a section on line c--Z indicaced in Fi 2. 3 and l are horizontel seotione views of modified forms of furnaces embodying my invention, the channels being curved.

In che drawings, A designates c furnace heertli of refractory, nonconmictivc Ina-terial, provided with a plurclib of open onnels as 1, 2, 8, etc, indicate" the v9.-

figiures of the drawings. These channels;

ich nmy'be either straight or curved, as shown, are provided with longitudinally sloping bottoms B. A series oflnclined, lat,- erolly closed. conduits or flucs Q-conncci each of the 0 on channels with the ad'acent ones,- the she. low end of each cha-nnc being-con nected wick the deep end of the adjacent channel as clearly indicated in Fig. 1; 3 i

The hearth A is provided with a, centrally disposed opening D within which extend portions of one or more electro magnets oimdnntors E, preferably'of the form and atrangemon'g illustrated. The elcctro magn'el E 15 provided with windings. F whichurecei vp current from a suitable source, the electromagnet and winding being of the usual typo" eglploycdin. the art for producing the Joule e :ect

Inasmuch as the intensity of the Joule effect is inversely proportional to the cross section of the molten mass, it will be seen that the ortions of the'rrl'ctcl Within the inclined conduits or fines C; and in the shallow orlions of the- 3l.uinnels 1, 2, 3, etc, wil be heated more re idly than the metal in the deep Fortion of these channels, and oonsequent y there will be 'a continuous 11 ward movement of the molten mess within t e inclined conduits or flues O, resultin in a continuous circulation of the m0 ten mass through the channels and conduits, thereby effecting a. thorough mixing of the molten particles and constantly renewing their con-4 teotin surfcce with the reactive agents.-

v Wln c Llmv'e illustrated my invention in connection with, three embodiments only thereof, it is to be understood that such embodiments may be modified Within the 300 of the cppcnded claims without departing from the spirit of my invention.

Having now fully described my invention, I claim:

1. In a furnace of the W e set forth, ahecrbn provided with a, plum ity of receptoolcs for molten metal, each having a longitudinally inclined bottom, laterell closed conduits connecting said rcceptcc es and electrc-Incgnet'ic means adapted to set up an induced electric'current in metal contained in said. receptacles and conduits, substantially .ns and for the purpose s ecified.-

2. In a furnace of t' e ty e set forth, a hearth provided with mplnrc city of rece tal clues for molten -.n1e"ual, united in on on less' system or crucible latcrelly olosedinclined conduits end electrounc netic niesns sldspted to set no an induced electric currentin metal contained in said receptacles and con- 3. In e furnaceof-the ty e set forth, at hearth provided withgefplum ity of receptacles for molten metal, each having a longitudinally inclined bottom, laterally closed inclined conduitsj' connecting opposite ends of said'receptscles and uniting some in an endless system or crucible and electro-ningnetic means adapted to set up an induced electric current in metal contained in said receptacles and conduits. Y

4.,111 a furnace of the type set forth,n hearth provided with s plurality of open channels of greet-er depth at one end then theother, e plurality of laterally closed inclined conduits connectin the shallow end of each channel Wihlilfi end of the adjacent smear channel and electro-mzignetic means adapted to set up an induced electric current in metal contained in said channels and conduits.

5. In a furnace of the ty e set forth a plurality of open channels eac having a longitudinally inclined. bottom, the shallow end of eech channel heii'ig adjacent the deep end of the next succeeding channel, said channels being united in an endless system or crucible by laterally closed inclined conduits and electro-inagnetic means adapted to set up an induced electric current in metal contained in said channels and conduits.

In testimony whereof I here hereunto set my hand in presence of two witnesses.

GUSTAVE GIN.

'Witnesses: I

HENRI Ronnie, HERNANDO DE SOTO.

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