DE1758911C2 - Method and installation for separating lead from metal scrap containing lead particles - Google Patents

Description

60 The individual particles are then as they were shortly before

can be blown off, once wet, on the other

The invention relates to a method for separating can still traces of heavy material, such. B. traces of magnetite and / or ferro-silicon containing lead from a lead particle. Mixture of solid metal particles, originating from the direct contact with the warm liquid of the processing of metal-containing scrap or from the preheating stage, on the one hand, a separation of cable waste is achieved by liquefying lead, which is achieved by water, on the other hand, the mixture of metal particles is also incorporated liquid me- adhering heavy particles removed. This is important for dium as a heat transfer medium that is applied to the melting bath, the separating bath, as the

1 758 91 I.

3 4

Heavy particles such as magnetite and ferro-silicate 30 are produced and are via a smoke train 31

zium, carried away to act like a catalyst on the separating bath.

and its oxidation, d. H. its aging, in the preheated in the drum 29 and woven Any metal particles that have dried at the high separating bath temperature are now the speed up. 5 actual separation bath supplied, which is essentially

To carry out the method according to the invention from one with a hot liquid medium 3, de, -rens a system with a flow temperature above the melting point of lead is suitable sigen medium as a heat transfer filled vessel, which is located, filled vessel 2, in which one with a Separating bath, provided with a loading device- sieve bottom 4 provided vibrating discharge device, one equipped with a sieve bottom, io device 5 is immersed. At 28 the drive is the Au -, - oblique Vibrie- iragsvonichtung5, which is immersed in the liquid medium. The discharge devices Discharge device for the non-applied device 5 carries the non-melted metal part table melts metallic particles and no drain, here the copper particles 33 from the liquid for the melted lead with an upstream medium 3, while the melting lead Preheating device, the heating power of which penetrates independently 15 sieve bottom 4 and is in the bottom of the Gegig can be regulated by the separating bath. fäßes 2 collects as liquid lead 8 and a

The preheating device can be removed from a gooseneck-like drain 10. A

Implementation of the invention essentially from an additional drainage function 25 is provided,

continuously charged, rotating drum The vessel 2 hangs in a walled trough 26

consist of that with a warm gas. for example 20 den from below for direct heating of the separating bath

with warm flue gases in countercurrent to which another burner 27 is connected. Bi--

The mass of metallic particles passing through on this arrangement results in the essential advantage

is beat. in that the hot heating gases are essentially

Another embodiment of the invention consists of the part of the separating bath filled with liquid lead -

in that the preheating device flows against a preferably as, so that local overheating occurs

with the liquid medium of the liquid medium 3, which is the same as the separating bath, is excluded.

filled, heated container, provided with an In A b b. 2, the preheating is carried out via a

Submersible conveying device for discharging the mixed bath reached. Those in the liquid medium

total of the preheated metal particles. 37, which is more advantageous to the medium 3 of the separating bath.

In the figures, exemplary embodiments that are identical to each other are introduced metal particles 32, 33

Invention shown. fall on a submersible conveyor 34 with a

It shows drive 35. The lower area and the end of the

Fig. 1 shows a system in which the separating bath is an immersion conveying device with screen linings 36 and

Trom 41 loaded with flue gas in countercurrent. Through the screen lining 36, the meter can

mel is connected upstream, ₃₅ tall particles 32, 33 adhering, are in the liquid metal

Fig. 2 shows a system in which the separating bath contains a dium 37 detaching residues of suspended matter, such as

Vorwäiinbad is connected upstream. Ferrosilicon and magnetite, are excreted.

A loading device 1 is used to feed the upper screen netting 41 as a take-off for still

amount of metallic particles, here a mixture of adhering liquid medium, e.g. B. high heat

Lead particles 32 and copper particles 33 of the system 40, permanent oil, is used.

· It is first fed into a circulating The liquid medium 37 is located in a drum 29, which are in countercurrent to the container 38, which is in a further brick trough 39 wandering metal particles 32, 33 suspended with flue gas and acted upon by a further burner 40 is. The flue gas is heated by a burner.

1 sheet of drawings

Claims (6)

point is heated above lead temperature, claims: is introduced, and in which the melting metal particles on a path of the sinking, 1. A method for separating lead from liquefied lead in a different way from the mixture containing lead particles, according to patent 1,583,879.
Generic metal particles, originating from the recovery of lead after the recovery of metal-containing scrap or from cable scrap . Mixture of metal particles in a liquid medium the separating bath a heating device of a relatively large medium as a heat transfer medium, which is heated to a temperature that exceeds the melting point, so that the temperature exceeds the point of lead even when the point is heavily loaded To which the insufficient amount of heat is given, melting metal particles on a path and the temperature does not deviate below the melting point of the sinking liquefied lead. On the other hand, care must be taken to remove the path from the heat transfer medium, 15 so that the temperature of the separating bath does not rise sharply, as is the case in patent 1,583,879, because with the fluids used it is evident that the mixture of metallic particulate media often occurs around organic compounds hankel immediately before it enters the Wardelt, which accelerates at high temperatures to a level below the melting point of cracking.
Lead lying temperature is preheated. 20 The object of the invention is to regulate the 2. The method according to claim t, thereby facilitating the separating bath temperature and indicating its heating, that the preheating is reduced by the power. It is also a job of direct contact of the mixture of metallic particles invention to ensure that, if the mixture memit a warm gas takes place. tailener particles should adhere to moisture, this 3. The method according to claim 1, characterized in that it is kept away from the separating bath. indicates that the preheating by di- According to the invention it is therefore proposed that direct contact of the mixture of metallic particles - the mixture of metallic particles immediately in front of seikel done with a warm liquid. nem entry into the heat transfer medium on one under the 4. Plant for the implementation of the procedure Melting point of lead lying temperature vorernach claims 1 to 3, /> it one with the 30 is warmed. liquid medium filled as a heat transfer medium. the separating bath, provided with a charge, that a substantial part of the heat requirement kungs device, one with a sieve bottom is laid in the preheating stage. This works equipped, inclined into the liquid medium - usually at a much lower temperature, submersible vibrating discharge device for 35 for example with 100 to 200 °, and is therefore lightweight not melted metal particles and ter to regulate. The separation bed now only needs a drain for the molten lead, known as the difference between that for preheating is characterized by an upstream: preheating intended temperature up to the working temperature direction, whose heating power is to be applied independently of the separating bath. That can be done Separating bath is controllable. Adjust 4 ° separation bath to a narrower range; 5. System according to claim 4, characterized thereby, its heating power can be reduced, and one draws that the preheater in the we- overheating is largely switched off, essential from a continuously fed, at the same time a removal of any adhering rotating drum (29), which is reached with water. . a warm gas, for example with tubs 45. An embodiment of the process flue gases according to the invention, in countercurrent to which they pass through, is characterized in that the pre-heating mixture of metallic particles is impacted by direct contact with the mixture. ner particles takes place with a warm gas. This 6. Plant according to claim 4, characterized in that the preheating device represents an economical 5 ° solution, because a warm gas, for example with a liquid like the separating bath, comes from a combustion Smoky medium filled, heated container (38) gas, is to be provided with the simplest means,
provided with an immersion conveying device (34). The method can also be designed in such a way that, in order to discharge the mixture of the preheated, preheating takes place through direct contact of the Ge metal particles. 55 amounts of metallic particles are carried out with a warm liquid , This procedure is particularly suitable when the mixture of metallic particles immediately is obtained from wet heavy beet processing.