US1875169A - Reverberatory furnace - Google Patents

Description

Aug. 30 1932. w. F. SKLENAR ET AL REVERBERATORY FURNACE Filed Aug. 7, 1931 Patented Aug. 30, 1932 Unites STATES PATENT OFFICE WEN ZESLAW FRANK SKLENAR, OF LONDON, AUSTIN HUDSON RON AN, OF EALING, LONDON, ENGLAND REVERBERATORY FURNACE Application filed August 7, 1931, Serial No. 555,798, and in Great Britain August 11, 1930.

r This invention relates to improvements in reverberatory furnaces and whilst it is of particular value for use in melting relatively small charges of ferrous as well as non-ferrous metals and alloys, it is not restricted thereto. The primary objects of the present invention are to economize fuel and to reduce to a minimum the loss'of metal due to burning or oxidation during the process of melting.

According to the present invention, a reverberatory furnace comprises a metal casing, the bottom of which is of an arc-shaped form in transverse section, an inner lining of refractory material to form a hollowed bed of a semi-cylindrical shape in cross section, an uptake through which the products of combustion escape, means for continuously oscillating or rocking the furnace to and fro during melting, a stationary burner arranged at the axis of oscillation of the furnace and projecting through an orifice in the end wall of the furnace opposite the uptake end, the said burner being so positioned that the flames or gases of combustion are directed downwardly to impinge on the surface of the metal in the bed and on to the surface of the bed exposed by the movement of the metal therein due to the oscillation of the furnace, a hood, in communication with a chimney, arranged above the uptake and so shaped as to receive the products of combustion escaping from said uptake irrespective of any angular position of the furnace, a charging door in said hood so arranged as to charge the metal into the uptake for preheating it therein, tapping and slagging spouts in the furnace, and means for supplying air under pressure to the burner and preheating said air by causing it to pass through pipes heated by the escaping gases of combustion.

This invention will be now more particularly described making reference to the accompanying drawing in which Fig. 1 is a view in side elevation-partly in section on line II of Fig. 2of a reverberatory furnace embodying this invention, and

Fig. 2 is a view in end elevation partly in section on line IIII of Fig. 1.

Throughout both views similar parts are marked with like letters of reference.

According to the present invention, a furnace comprises a metal casing a, the bottom of which is of an arc-shaped form, an inner lining of refractory material to form a hollowed bed Z) of a semi-circular shape in cross section, a combustion chamber 0 above said bed, a. tapping spout (Z, a slagging spout 6, means for continuously rocking the furnace about a longitudinal axis y so as to rock the metal a:-within limitswithin the bed 6, and means for heating the furnace such as an oil, gas or pulverized fuel burner or oil atomizer The burner f, which is stationary, is located at the axis y of oscillation of the furnaceand projects through an orifice f in the end wall of the furnace. The burner f is also so positioned that the flames'or products of combustion are directed downwardly toimpinge on the surface of the metal a" and the surface of the bed I) exposed by the movement of the metal within the bed due to the oscillation of the furnace.

Any'suitable means may be provided for rocking the furnace for instance it may be mounted on trunnions or preferably the arcshaped bottom of the casing a is supported by wheels or rollers g and provided with a pair of racks h adapted to be engaged by toothed pinions 2' carried by a shaft i mounted in suitable bearings. The shaft 11 is driven alternately inopposite directions by any suitable form of gearing. The rocking movement of the furnace is limited in each direction. The products of combustion escape through the uptake 70 situate at the opposite end to the burner The lower part of a chimney shaft Z* is flared or arc-shaped to form a hood Z above the uptake 70, which is provided with inwardly and downwardly sloping members 70 the arrangement being such that the products of combustion escaping from the uptake 70 are received by the chimney shaft Z* irrespective of any angular position the furnace can assume. The chimney shaft Z* is formed with a soot chamber Z which is normally closed by a door Z The metal is charged into the uptake 70 through an opening in the hood Z normally closed by a door Z hinged at Z to the hood Z, as shown so that the combustion gases escaping through the uptake 76 pre-h'eat the metal before it passes to the hollowed bed 6.

i 5 Inthe construction illustrated,.-powdered fuel with air under pressure is supplied to the burner f." The air may beheated by passing it through a tube recuperator Z carried in a passage Z forming the outlet for s 10 the-chimney shaft l above theheod land T immediately above the soot chamber- Z It is found in practice that with a furnace embodying this invention, not only is the 1 metal reduced to a moltenstate in less time o r than usual, with a'consequentsaving of fuel,

but the; quality of themetalparticularlyin f the caseofalloys isimproved. c e declare that what we claim and desire to secure -'by-. Letters-' Patent-:isz reverberatory furnace comprising a metal casing, the bottom-of which is of an arc shaped form transverse sectioni (mint nei liningof refractory material to forma hollowed :bed-of a semi cylindrical shape in cross. section, a combustion chamber above 4 said bed, an uptake extending upwardly from Q thegcombustion cha1nber,fthrough which the products of combustion escape, means for V eontinuually,oscillating or rock-ing-the -stur-v nace toand fro-duringmelting, astationary burnerarranged at the ax is of oscillation of i the furnace and iprojecting through an orific'enn theqend wallaof the furnace opposite to the uptake end, the 'said burner being so positioned that thefiamesor gases otcombustion are.-direeted'downwardlyto impinge on the surfaceof'the metal in the bed and on the surface of the bed "exposed day the movement of the metal therein'edue :to the oscillationof form'term'inating the lowerend-of afchimney shaft and arrangedaboveithe'upta-ke, inwards Ly and; downwardly sloping memhers carried 4 the uptake and 'co-actingwith the aroshaped hood to receive the product's ofconrbustion escaping from said iuptake irrespec tiiveofany angular'position of'theturnaceya door closing a nha-rging opening :formed in I one side of thexhood, said opening being so arranged as to chargethe metal'intoithe shaft whereby the combustion gases:escaping through said uptake heat the metal ibefor'e the latter passes tothe hollowed bed tapping and slaggin'g spouts in the furnace, means' for supplying air under pressure to the burjnergand means for pre-heating said lair by causing it :to pass through pipes heated" by itheiescaping products of -co1nbustion, as set forth. Y

T .0; WENZESLAW FRANK :SKLEN'AR.

Austin HUDSON RON-AN,

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