US1823005A - Reverberatory furnace - Google Patents

Description

Sept. 15,1931. w. F. S KLENAR v 1,823,005

REVERBERATORY FURNACE Filed Aug. 15. 1929 2 Sheets-Sheet 1 I NVENT.OR.

Br QM 2241 Sept. 15, 1931. w. F. SKLENAR 1,823,005

REVERBERATOI W FURNACE Filed Aug. 15. 1 29 2 Sheets-Shet 2 Patented Sept. 15, 1931 UNlTED STATES WENZESLAW FRANK SKLENAB OF LONDON, ENGLAND REVERBERATORY FURNACE Application filed August 15, 1929, Serial No. 386,145, and in Great Britain October 22, 1928.

This invention relates to improvements in reverberatory furnaces and is particularly applicable for use in melting relatively small charges of metals and alloys. In the case of non-ferrous metals and alloys particularly, it is the usual practice at present to employ pots or crucibles for melting charges of from 150 lbs. to 300 lbs. or more and as is well known the cost of melting metal in pots is much greater per lb. melted than is the case with reverberatory furnaces, but so far it has not been practicable to employ reverberatory furnaces for comparatively small quantities of metal.

The primary object of the present invention is the production of a relatively small tilting reverberatory furnace capable of economically melting relatively small charges of metal.

The present invention comprises a suitably shaped metal casing, an inner lining of refractory bricks so shaped as to form a hollowed bed, a combustion chamber above said bed, and a shaft or hopper from the combustion chamber, a tapping spout arranged above the normal level of the metal in the hollowed bed, a combined tapping and inspection door covering the spout, a charging door within the shaft or hopper which is so arranged that the combustion gases escaping therethrough pre-heat the metal before passing to the hollowed bed, means for heating the furnace, such as a removably arranged oil burner or atomizer, a fan or blower for supplying air to said furnace or burner, and with or without one or more pipes situate in the shaft or hopper above the charging door or in other convenient position within the furnace and through which all or some of the air may be fed by the fan or blower so as to be heated before passing to the furnace or burner, and means for tilting the whole furnace to allow of the melted metal escaping through the tapping door or spout. A chamber may be formed in the shaft or hopper above the air pipes adapted to contain and heat one or more pots or ladles for receiving the metal when tapped.

This invention will be now more particularly described making reference to the accompanying drawings in which i Fig. 1 is a view in front elevation of an oil fired reverberatory furnace embodying the present invention.

Fig. 2 is a view in side elevation thereof.

F ig. 3 is a view in sectional front elevation thereof.

Fig. 4 is a view in section on line L-t of Fig. 3, and v Fig. 5 is a View in section on line 55 of Fig. 3.

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

In one convenient embodiment of this invention, the bottom of the casing a or furnace is of a rounded or are shaped form and is provided with similarly shaped rails or runners a adapted to be supported by two or more pairs of wheels or rollers Z). Each wheel or roller 6 is mounted to freely revolve in bearings b carried by a foundation plate '5 Suitable stops a are provided to limit the tilting movement of the furnace in a backward direction. The tilting movement is effected by a suitably arranged handle or lever a fixed to the casing'a or in other convenient manner. The bed 0 of the furnace is formed from refractory bricks so shaped as to form a curved bed which can be entirely emptied of molten metal when tilted and to allow of being readily scraped or cleaned through a tapping door (Z. One side of the casing a may be made removable to allow of being readily relined. The combined tapping and inspection door cl is arranged to be lifted clear of a tapping spout e by mounting it to slide in vetrical guides (Z on the front of the casing a. The tapping spout e is normally closed by a suitably shaped brick 6 carried by the tapping and inspection door (Z.

The tapping spout e is normally above the level of the molten metal m in the bed 0 as shown.

The shaft or hopper f, which is at the rear opposite to the furnace or burner g in the case of an oil fired furnace, has a restricted lower portion 7 leading to the curved bed 0 on which the metal is melted and the one wall of said restricted portion forms a] bridge or baffle f for deflecting the flame from the burner 3 and combustion chamber down on to the surface of the metal in the curved bed 0. A charging door 9 is arranged above said restricted portion 7 so that the metal is preheated before passing to the bed 0. A fan or blower it, together with an electric motor 2' for driving it, is mounted on a bracket b 1 to one side of the casing a. The air from the fan or blower h is-led through one or more brick lined or brick cored pipes 70 arranged in the shaft or hopper above the charging door 9 so as to be heated before passing to the furnace or burner y. Means may be provided for bye passing the air from the fan or blower h so that either cold or heated air, or both, are supplied to the furnace or burner 1 In the shaft or hopper above the air, pipes k is formed a chamber Z to which access is readily obtained by a hinged door Z This chamber is adapted to receive and heat one or more pots 2 or ladles into which the metal may be tapped before pouring into moulds. The lining of the shaft f, inspection door (Z, bridge or bafiie F, the roof of the combustion chamber 0 and bed 0, are formed as relatively large unit bricks of pre-cast refractory material so shaped as to fit together within the metal casings of the furnace and form the desired contours so as to enable any part of the interior of the furnace to be readily replaced Without employing skilled labour.

It will be appreciated that although this invention has been described as being heated by means of oil fuel, it can be heated by gas or coke by slightly modifying the construction to adapt it to such heating means without departing from the essential features of the invention.

I declare that what I desire to secure by Letters Patent is An oil fired reverberatory tilting furnace comprising a metal casing, an inner lining of precast bricks of refractory material formed as large units, so shaped as to be fitted together to form a hollowed bed, a combustion chamber above said bed, a shaft eX- tending upwardly from the combustion chamber, one wall of said shaft forming a baffle to deflect the flame from the burner and combustion chamber down on to the surface of the metal in the hollowed bed, a door closing a charging opening formed in one side of the shaft, said opening being so aranged that the combustion gases escaping through said shaft pre-heat the metal before the latter passes to the hollowed bed, means for pre heating the air supplied to the burner and means forming a space in said shaft for preheating the receptacles for receiving the metal When tapped by utilizing the heat of the combustion gases escaping through the shaft, as set forth. WVENZESLAW FRANK SKLENAR.

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