US940774A - Apparatus for treating molten metals. - Google Patents

Description

E. S. ADAMS. APPARATUS FOR HEATING MOLTEN METALS.

APBLIUATION FILED JULY 22. 1909.

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@9M/meow@ mmm@ FRANCIS S. ADAIVS, OF LEETONIA, OHIO.

APPARATUS FOR TREATING MOLTEN METALS.

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Specification of Letters Patent.

Patented Nov., 23. lltltll.,

Application led July 22, 1909. Serial No. 508,950.

To all whom, 'it may concern:

it known that I, FRANCIS S. ADAMS, a citizen of the United States, residing at Lectcnia, in the county f Columbiana and State of Ghio, have invented certain new and useful Improvements in Apparatus for Treating Molten Metals; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an apparatus for treating molten metal for the purpose of reducing or eliminating the sultur rand the occluded gases. n

The object of the invention is to provide a simple apparatus by means of which the above may be accomplished yeconomically and within the minimum time, thus increasing the value of the apparatus commercially and for the useful arts.

Nith this and other objects vin view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be more fully describedv and particularly pointed out in the appended claim.

In the accompanying drawings: The iigure is a side elevation partly in vertical section of an apparatus embodying my improvements.

Referring to the drawings for a more par ticular description of the invention the apparatus comprises a substantially cylindrical vessel 1 proyidel with an inner lining 2 of fire brick orother equivalent material and with a removable cover 3. A pot 4: for the molten metal is provided with an linner lining 5 of re brick and is mounted upon the bottom of the casing. Arranged in the casing with their' lower ends .immersed in the molten metal in the pot 4 is a pair of carbon electrodes 6 and 7 respectively, which are insulated from the metal in the pot by the tire brick cylinders 8 and are connected with the conducting wires 9 which may lead to a suitable source ot' current. These electrodes maybe raised or lowered inthe metal to provide greater or less heating surface by the following means:

Flexible elements 11 and 12 are suitably connected with the upper ends of the electrodes and pass over pulleys 13 and 14 mounted upon the horizontal arms 15. The upper ends of the elements 11 and 12 are connected with the upper ends of the cylindrical cores 1G which pass through solenoids 17 supported from the brackets 18. The solenoids are energized by the wires 19 which connect with batteries 20 While a rheostat 2l is arranged in the circuit to increase or decrease the current to lenergize the solenoids to a more or less extent, it being evident that by increasing the current through the solenoids that the core 16 will be drawn farther down and raise the electrodes a corresponding extent "while by decreasing the current the electrodes will be permitted to lower into the metal. v

A vacuum is created in the casing 1 by the vacuum pump which' is connected by means ot a pipe 23 with the upper end or' the barometric condenser 24. A. second pipe 25)' leads from the upper end of the casing 1 to the upper end or the condenser 24C while a lthird pipe 2G establishes communication between the pipe 25and the pipe 23, valves 27, 28 and 29 being arranged in the pipes 2G, 23, and 25 respectively.

In practice a vacuum may be created in the casing by means ofthe vacuum pump alone by closing the valves 28 and 29 and opening the valve 27 while a vacuum may be created in thc casing by the barometric condenser which may be of the steam jet type by closing the valves 27 and 28 and opening valve 29 while the condenser and vacuum pump may operate together by closing valve 27, and opening valves 28 and 29 respectively.

In practice, the pot 4 containing the mol.-

ten metal is placed in the casing 1. A Vacuum is then-created in the casing as heretofore explained to reduce the pressure uponv the metal to nearly zero in order to4 lower the boiling point and to increase the speed of vapor-ization of the sulfur contained in the metal. be freed more readily. The hottest metal in the pot rises to the surface and the vapors and gases given ott will take heat from the surface, hence hotter metals will be constantly displacing the surface metal and this mechanical motion will bring every atom of metal to the surface at some time and its burden will be reduced. To keep the metal in a molten state hot enough to aid in the vaporization, an electric current is passed through the bottom of the metal as heretofore explained. By this nietlnid of eliminating the sulfur, ferro silicon, ferromanganese and aluminum in iron and steel rJihe occluded gases will also da, @www the pracce of poing Soppe? in L @filming of copper cm1 be dlssgensfei with., in eliminating the sulfur the @ms and. Suiids broken up uml combine und. as sukui: dioxid. Wyhlen l; is found. im the@ is not enough oxid pfesem; 'to cams@ al?.

vconnection wih fthe accompanying drawvacuum in the 2, of e'acmodes in *die pot, means for passing a Current th'ough ih@ eleclofes t@ heim the mami and elecitomrngrlei means 0r raising or l0w- @ring ik@ eeotiodeg said means comp'siiig soieiioidss zii-ranged in the casing, cores passing ihiwgh the soenois, ielble elements hat fwn me 'upper 0iE 'the coi'- and the ei-ecrodes, :L 20u30@ of Climent for ih@ Soleno'iis und means 3E@ Vmfying the surfent ihmigii 'the sgenid En testimony whereof I have inw/samt@ set han@ 'bwo suiaisciibng fr/iimesses.

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