SU108883A1 - Lead production method - Google Patents

Description

The method for obtaining lead from rich sulfide concentrates by electrolysis in molten media with no mixing of the concentrate and electrolyte being processed is known.

Distinctive feature

The proposed method is the implementation of said mixing by jets of molten metal released during electrolysis. Such an implementation of the method provides a high mixing efficiency and prevents the formation of sludge crusts and wall coverings while at the same time eliminating the delays caused by the corrosion of the mixing mechanisms in the molten electrolyte.

The drawing shows a device for carrying out the proposed method.

The device is a bath 1 lined inside with chromo-magnesite brick and diabase tiles and placed in a box of thermal insulation

material in a metal frame.

The bath is divided by partitions into four communicating compartments: the electrolysis compartment, the drain when the IC is 3, the discharge section 4 and the pump section 5.

The bath is heated to the required temperature using silicon or other heaters and filled in the lower part with molten lead 6, which is the cathode, and in the upper part, the electrolyte 7, in which the anodes 8 are immersed.

A grid 9 with angled holes is installed under the surface of the cathode lead.

A centrifugal pump 10 with a vertical shaft installed in the pump room pumps molten lead from the pump room to the electrolysis room under the grate. The lead is jetted through the grate, creating on the surface of the cathode lead a kind of "fluidized bed, in which the preheated lead concentrate is fed to the feeder // end of the load.

When lead sulphide comes into contact with molten lead saturated with metallic sodium, which is released as a result of electric current, galena decomposes into metallic lead and sulfur released at the anode (gaseous product).

The resulting metal is periodically removed as it accumulates. The decomposed concentrate in the electrolysis compartment 2 moves to the discharge end and is discharged into the water

3. where it is flushed with a swipe and refilled. Hepas / irauntus residue of impurities (ZnS FeS, S1O2, etc.) is thrust in the discharge compartment

4, from where it is periodically removed. From tepMeTH3HpoBaHHcro electrolysis compartment, gaseous sulfur (anode product) is pumped out to a condenser, where it condenses as a powdery substance.

The number 11 in the drawing denotes silicic or other water heaters.

P) e d e mt and c about b) et s and u

Claims (6)

1. The method of obtaining lead from rich sulfide concentrates by electrogas in molten media with stirring of the processed concentrate and electrolyte, characterized in that, in order to ensure high mixing efficiency, to prevent the formation of smooth crusts and accumulations while simultaneously eliminating delays caused by corrosion of mixing mechanisms in the molten electrolyte, this mixing is carried out by jets of molten metal released during this electrolysis. 2. A device for carrying out the method according to claim 1, characterized in that a lattice is located in the bottom part of the electrolysis chamber, under which molten lead is pumped by a pump, forming upward jets mixing the material under electrolysis at the exit of the lattice holes. 3. In the apparatus of claim 2, use a centrifugal pump with a vertical shaft to inject the molten metal. 4. In pump no. 2, the use of easily detachable connections, for example, conical nozzles, which allow the pump to be replaced without stopping the electrolysis process. 5. In the device, but item 2, when the lattice is changed, with openings inclined towards the discharge end, which serve to move the material to be processed with the help of jets of metal coming out of these openings. 6.In the device on Mon. 2, 3, 4 and 5 use of partitions dividing it into the electrolyzer itself, discharging at the bottom, discharging and pumping compartments, serving respectively for unloading concentrates, carrying out electrolysis, metal discharge and additional washing of incompletely reacted concentrates with them, scooping metal and the location of the pump.