DE2255427A1 - PLANT FOR PRODUCING A METAL THROUGH ELECTRICAL REFINING - Google Patents

Description

Plant for producing a metal by Electro refining

The invention relates to a plant for producing a metal by electro refining. which occurred through continuous, electrolytic deposition of the metal on an object in motion playing the role of a cathode and through subsequent melting of the unit consisting of the object with its deposit ... _t _,. ......

The creation of a metal in an electrolytic bath has always been seen as a tempting way to get pure metal »

Although the electrolytic processes described in the literature are generally not continuous, Dutch patent No. ₀ 69-10403 relates to cathodes which can be used in a continuous system by gradually placing the cathodes in the electrolytic bath and in a Runs in melting device, in which the precipitated metal is melted »

109820/0808

This system has the disadvantage that the cathodic strike takes place in the air atmosphere, which creates the risk of a This deficiency could be caused by an oxidation inert environment can be prevented »

The invention aims at the optimal concentration of the ingredients the plant in such a way that they are surrounded in an economical manner by an inert atmosphere

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According to the invention, the solution to the problem is that the electrolytic tank and the melting device are arranged under a tight jacket which encloses an inert atmosphere generated by the melting device and with an entry lock for the passing through Object and an exit sluice for the melted product is provided

The melting device expediently consists of a plasma torch and the exit sluice from an extension of the exit, which opened into a collecting bath for the refined product

Furthermore, e3 is recommended, the mantle of the geometric form to adapt to the tub, with the addition of the outlet sluice can consist of a bath of molten mats "

Further details and advantages of the system according to the invention are described in more detail below with the aid of an exemplary embodiment shown in the drawing »Ea demonstrate:

1 shows a schematic longitudinal section through an installation according to the invention,

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Figo 2 shows a cross section through the system according to lig. 1"

In the system shown in the drawing, as Electrolyte molten salts can be used ©

The tub for the electrolyte is made of a welded box 1 made of ordinary steel or inox (stainless steel) The tub is directly connected to the tub 1. The tub is divided into three parts in the longitudinal direction: An anode chamber, r 4- in the middle and two anode chambers 5 on both sides of it * The dividing walls (membranes) 6 are made of porous metal or chamotte or porous graphite you "prevent the to the chambers in the anodes in suspension that are available impurities in the cathode Kammer reach <> ^λ the tub can be heated by a special device or cooled. The bath can be heated to melt the salt when the system is started up by feeding an alternating current between the tub and a series of auxiliary electrodes, using the molten salt itself as an electrical resistance hermetically insulated lid closed »

The charging of the anode chambers 5 with the metal to be electrolytically dissolved is arranged directly at the bottom of the tub, where it is automatically connected to the positive pole o

The cathode consists of a thin metal strip 7, the is wound onto a core 8 at the starting point »This metal strip is gradually unwound and

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penetrates via the drive device 9 and a lock 10 into the electrolytic cell, then it runs to a support and guide device 11 before entering the electrolytic bath immerses »He walks through the bath without coming into contact with the building materials of the system, whereby he gradually increasing in one thickness, and then on the other End again, where he is guided again by a leadership aayotem 12 is supported »

Drive rollers 9 and guide rollers 11 and 12 cause the electrical connection with the negative pole the generator fj »loo Unwinding speed of the metal strip lot from the Intensity of direct current dependent; to get one adequate rainfall at the exit of the BadeB it will regulated

Hiii plasma torch 13 cuts the strip. Ma / 3-gabo HisM Vorlauf »(constant brushing) e Basically fresh argon is used for the piaoma burner, the at the same time feeds the atmosphere of the electrolysis cell. The metal and salt drops fall together on a rotating one Disc 14 and are thereby against a cold wall 15 Finally they fall into a container, in which the metal spheres formed in this way are in one Collect collecting bucket 16.

33a must emphasize that in accordance with the Er Ci ndun / i diu lichmelzvorrichtun / i inside a chamber 17 of the TA chi-rol yao cell under a dense jacket 'fjchl en se 1ü provided.

According to the embodiment shown, a Bath made from soothing salts. How this works

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BATH

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The embodiment of the system according to the invention is as follows: First, the bath is prepared including melting the salt in an inert argon atmosphere * on top of it the anode chamber its charge, and the cathode strip is brought into its correct position. "Then the direct current switched on, and the process of electric refining begins » The cathode strip unrolls very slowly into the bathroom and gradually increases in thickness « After emerging from the salt, the cathode strip is melted with the plasma torch and broken into small spheroids or spheres transformed »Once a roll of the cathode strip is used up, it is replaced by another, the two strips being butt welded be connected to each other »The cathode strip can to obtain a pure metal from the same Compose metal like the metal to be applied or from another metal to make alloys. on this way you get small metal balls at the exit, which are basically no longer vulnerable to oxidation » Melt these beads again under vacuum bars of very high quality and purity can be obtained «.

It is very beneficial to have multiple electrolytic cells; a melting unit in a single and single chamber to be summarized under an inert atmosphere. This common inert chamber solution is individual filling Extremely preferable to each cell separately with argon; aside from that the problem of the entry lock and the exit lock is simplified. '

The invention is of course not limited to the above Embodiment described is limited · So is the cathode does not necessarily have to be a continuous strip »you

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30982U / Ü8Ü8

-6- 7255427

can just as well be rectangular through a continuous chain that runs through the cathode chamber in a vertical position Plates to be replaced »

Pate rüche ntansp!

25 14 5 - ME / Hf

ORIGINAL INSPECTED

Claims (1)

_ 7 - P a t e n t a η a ρ r ü c fa e: Plant for the production of a metal by electrorefining, the continuous electrolytic precipitation of the metal on an object in motion, playing the shell of a cathode and the subsequent melting of the unit consisting of "the" object with its' deposit " takes place, characterized by the fact that the electrolytic tub (i) .and the melting device (13) are arranged under a nominally tight dumbbell (17), which encloses an inert atmosphere generated by the melting device and has an inlet vent (1O) for the 'jQp.enstynd, as well as an outlet (18) for dive melted product Vera eh on isto ge according to claim 1, characterized gelcennsexohnetj-the melting device (1'3) nus oinem .Plasmabrenii (-; r and the outlet ttsach-loujj-e h \, h ü an extension of 'ol-h output, which in an Aüffangbnd for the refined product flowed. An installation according to claim 1 or 2 , characterized in that the jacket (17) is adapted to the geometric shape of the tub (1)., 143 - MI3 / Hf 3C3 8Z0 / C8 0 BATH Blank page