Pijiang metal refining method and device

Abstract

The invention discloses a method for reinforcing the heat transfer efficiency and creep-resistance for pidgeon process reduction tanks, a method for realizing pidgeon process reduction tank automatic charging and discharging, a method for continuous monitoring the pidgeon metal reduction procedure, a method for reclaiming reaction by-product base metals, a vertical reduction tank employing the methods and a pidgeon process reduction furnace constructed by employing the vertical reduction tank.

Description

Technical field [0001] The invention relates to the improvement of the traditional Pidgeon metal extraction process and equipment, more precisely, relates to the use and manufacture of a vertical reduction tank device. The invention can effectively improve the production efficiency and economic benefits of the Pidgeon method, mainly reflected in that it shortens the metal reduction cycle, prolongs the service life of the reduction tank, realizes automatic loading and unloading, realizes online continuous monitoring of the reduction process, and The recovery of alkali metal as a by-product of the reaction is realized. [0002] The description of the present invention will revolve around the refining of magnesium metal. But it is also perfectly suitable for refining other volatile metals, such as calcium, strontium, zinc and so on. Background technique [0003] Invented in the 1940s, the Pidgeon metal extraction method (US Patent No. 2330143, Canadian Patent No. 415764, 4157...

AI Technical Summary

Problems solved by technology

[0005] 2. The life of the reduction tank is short

At present, the average service life of the reduction tank is only 2-3 months

[0006] 3. It is difficult to load and unload materials

Its narrow operating space not only makes loading and unloading extremely difficult, inefficient, labor-intensive, but also leads to many safety hazards

[0007] 4. Unable to monitor the restore process

This often results in the phenomenon of "empty burning", that is, the reduction tank continues to be heated after the reduction reaction has been completed, thus causing a waste of energy; waste of raw materials

[0008] 5. Alkali metals cannot be recovered

However, this approach has not been widely adopted so far

One possible reason is that the method provided by Pidgeon cannot effectively prevent the loss of heat along the discharge channel, resulting in a significant decrease in the thermal efficiency of the reduction tank

Another possible reason is that Pidgeon failed to provide a suitable opening device for the discharge port cover to avoid the threat to the safety of the operator from the high-temperature residue discharged quickly under the action of gravity

Images