US1863686A - Device for the refining, mixing, and purifying of molten metals and metal alloys - Google Patents

Description

1,863,686 IFYING June 21, 1932. F. w. coRsALLl DEVICE FO'R THE REFINING, MIXING, AND PUR OF MOLTEN METALS AND METAL ALLOYS Filed July 23, 1927 @ZWZZWZZ fha/ry Wijf/m Mazza gw" fiar/f7@ freed from impurities.

larly 'subjected to prolonged Patented JunoZl, 1932 y I UNITI-:D srArEs rammen WILHELM oonsALLr, or imam, ummm 'nevica ron ran summe, mxmaann rumana@ .i :ar/rar. annoys Application. mea July as, naar,4 senat Nb. comas, and in Germany rune se, 192e'.

Meta-ls melted down in shaft furnaces are,

.as 1s known' imperfectly mixed and must first be freed from impurities for example: sulphur phosphorous andl like substances which favour the formation of gases forming bad castings. The present invention has for its subject matter an apparatus whereby the molten metal or alloy, preferably iron, obtained from a smeltingfurnace more particua cupola furnace, before being cast is movements and agitation, it being thus thoroughly mixedV and The apparatusconsists of a receiver provided with actuating means which impart to it, for example, oscillatory, rocking, jarring, rotary or other movements, however,

free falling movements liable to cause shock to the foundations of the apparatus, of the furnaces and the buildings are the invention. The movement of the'receiver has solely effect directly upon the .metal con-I tentscaus1ng prolonged agitation thereof,

' v receiver or it may be ri without otherwise acting injuriously upon adjacent parts. The receiver maybe made in a variety of forms,.for example, in the form of a fore-hearth if-it is to be placed immediately in front o f the smelting furnace. Y

According to the invention the receiver may be employed separately or in conjunction with a mixer of any kind, placed operatively in front of the receiverand receiving similar movements through actuating means separately or in common with the receiver. mixer may be arranged independently of the 'dly connected there.-

with, preferably the atter, in which case both receive the same motion from common actuating means.

In the event of the receiver being for eX- ample placed kin the manner of a fore-hearth in front of the smelting receiving directly therefrom the smelted metal for the purpose of purification and refining, the mixer may so arranged between the receiver and the furnace as to serve as a feeder of the metal to the receiver. The flow motion within the mixer may be utilized by means of suitable th guides to'eiect thorough mixing, prior to the metal entering the receiver. On its passage excluded by .may be -eifected -by electricity,

through `the mixer the, requisite quantities4 of re 'ng substances such as carbon, alloys, purifica-tion and reaction substances, which owing to the violent motion and splitting up` of the metal thoroughly dissolves therein. Further the flow of the metal within the mixer may be o F Homan inrizzcransv Nn metal receives the utilized for splitting up and mixing the mass of molten metal b y appropriately forming -the mixer to constltute a system of channels -extending to and agitation is eil'ected byA known means primarily by means of ing rnace which are led throu and/or receiver. Alternatively oil-burners, pulverized coal-tiring or the like,` if conditions be favourable thereto, also bymeans of pre-heated air. The auxiliary heating can also be effected by the addition of heat-evolving'substanes such 'as thermit. The con? comitant heating or agitation of the metal in accordance with the invention has the adease of gases expedited.

4The drawing illustrates diagrammatically 11.1 the invention by way ofexample, Fig. l being a vertical longitudinal section, while Fig. 2

. 1s a horizontal section on line II-II of Fig. 1-.

The apparatus consists of a lower receiver 2 .with upper mixer 1. The whole apparatus rests with bosses 3 upon wooden blocks 4 and when in operation is alternately raised and lowered by means of uniformly rotating cam disks 5 which act against noses or abutments 6 on the bottom of the vessel 2, thus producing a pronolmced risingor wave-like overrow motion of the metal contents being produced in measure with the magnitude and frequency of the said movements. Consemeans 0f known kind at a prolonged periody furnace or if required to impart superheat thereto. vHeating during the period of long-sections, the apparatusaccording tov through which channels the flue gases from the smeltgh the mixer the heating vantage that intermixture is aided and re- The 1 quently the whole mass of metal is thoroughly mixed, gases and impurities being separated.

The liquid metal enters at the apertures 7 into the mixer, iows in succession through the oblilely disposed channels 8 and passes at the ottom at 9 into the receiver 2. The largerv channels 8 are in communication with each other by means of smaller connecting channels, the metal being thus constrained to pass alternatley through large and small cross sections. The heating of the apparatus illustrated diagrammatically in the drawing, is effected by flue gases or other hot gases entering through the conduit 62 into the receiver 2, passing through it and imparting heat to the metal contents, whereupon they are led through a by-pass 61 at the other end to the upper portion of the mixer where they pass through the channels 8 and their connecting channels in contrary direction to the entering metal, towards the outlet 27 under the stationary up-take 28. A portion oi the heating gases from the conduit 62 enters directly through the aperture 9 into the lower -channels 8 of the mixer, traversing the entire mixer, and escaping at the outlet also through the up-take 28. Both parts of the apparatus may be employed in conjunction or either o them without the other and appropriately the receiver may be employed in place of a fore-hearth.

Claims:

1. Apparatus for reinng, mixing and purifying molten metals and metal alloys, comprising, a mixer adapted to receive molten metal, a receptacle connected with said mixer, channels in said mixer, the molten metal being mixed in the passage thereof through said channels, and a common actuating means for imparting an oscillating movement to said mixer and receptacle.

2. Apparatus for refining, mixing and puriying molten metals and metal alloys comprising a mixer adapted to receive molten metal, a receptacle rigidly connected with said mixer,means for the passage of molten l metal from said mixer to said receptacle, a, passage adapted to lead hot gases into said receptacle, a by-pass for returning said hot ases to the mixer in a direction contrary to the How of the metal', and a common actuatmg means for imparting an oscillating moven ment to said mixer and receptacle.

FRIEDRICH WILHELI CORSALLI.

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