CN2457175Y - New molten salt electrolytic bath - Google Patents

Abstract

The utility model belongs to the design of a novel molten salt electrolytic bath, particularly an internal heating molten salt electrolytic bath desired in the process of molten salt electrolysis of heavy rare earth-nonferrous metal intermediate alloy. Two internal heating probes controlled by a molten salt transformer in the bath can flexibly adjust temperature to sustain the best temperature for electrolysis. A caliber maximized cathode bearing device causes the same current density to reach the maximized electrolysis current, and has a certain practicability for other diffusion controlled electrolysis and electroplating of the intermediate alloy.

Description

A kind of novel molten salt electrolyzer

The utility model belongs to the design of fused-salt bath.

The existing fused-salt bath of producing rare earth metal-aluminium intermediate alloy, pot shell is made up of cylindrical cast iron crucible and the cylindrical plumbago crucible of being close in it, the molten salt electrolyte of packing in the plumbago crucible, the cylindrical of splendid attire liquid aluminium or truncated cone-shaped corundum crucible are laid in its bottom, a centre is with in the thin molybdenum bar one end insertion liquid aluminium of porcelain sleeve, the galvanic negative pole of another termination, galvanic positive pole is received on the cast-iron pot, behind the logical direct current, system constitutes the loop line, rare earth ion in the ionogen the liquid aluminium cathode surface be reduced into metal and and aluminium alloying, simultaneously to aluminium negative electrode internal divergence, the joule heating that alloy heat-transmission and energising produce makes system keep certain high temperature, when this part heat can not be kept electrolysis and normally carries out, increase such as heating unit outside the Globar etc. in that cast-iron pot is outside, but, in liquid cathode, spread the system of difficulty for heavy rare earths, particularly produce rich yttrium mixed rare earth-aluminium intermediate alloy with chloride system, though outer heating makes moderate progress to improving the electrolysis temperature problem, but root problem is still unresolved, because diffusion causes the cathode current density can not be big slowly; The limit electrolysis electric current can not be big thus; Little alloy heat-transmission that then produces of Faradaic current and joule heating all seldom seriously lack heat in the stove, all provide heat by the external world, and power is little, furnace temperature descends, and power is the energy consumption height greatly not only, and furnace temperature is fluctuated easily, electrolysis temperature departs from optimum value, the alloying constituent inequality

The purpose of this utility model is a kind of novel molten salt electrolyzer of design, alloy heat-transmission and joule heating that the generation in service of this electrolyzer is bigger, and increase internal heating mode makes electrolysis temperature keep optimum value all the time.

Electrolyzer of the present utility model is: keep existing groove shell constant, cylindrical or the truncated cone-shaped corundum crucible of splendid attire liquid aluminium replaces with the semisphere alumina crucible, and external diameter suitable for reading equates with anode graphite groove internal diameter, this makes cathode area reach maximum, under original identical cathode current density, can obtain maximum Faradaic current and maximum alloy heat-transmission; Simultaneously, in the graphite cuvette ionogen, insert two internal heating probes and be the electrolyzer additional heat, it is conical that this cylindrical probe lower end is, and can in time regulate temperature in the stove, also do not influence ionogen and stir.

This internal heating electrolyzer is not only energy-conservation than outer heating tank, and quick thermoregulation, guarantees in best furnace temperature electrolysis, and bore maximization liquid aluminium cathode crucible by obtaining maximum Faradaic current, obtains maximum alloy heat-transmission and joule heating and reach.Thereby accomplish the end in view.

Fig. 1 is known fused-salt bath structural profile synoptic diagram.

Fig. 2 is a fused-salt bath structural profile synoptic diagram.

Embodiment of the present utility model is described below in conjunction with the accompanying drawings: Fig. 2 is a fused-salt bath list grooved profile synoptic diagram.Anode has cast-iron pot overcoat (1), and liner is plumbago crucible (2), and semisphere porcelain crucible (3) is inlayed in its bottom, fills liquid aluminium (4) in it; Molybdenum cathode collector bar (5) overcoat porcelain sleeve inserts in the liquid aluminium; Two lower ends of drawing the control of domestic AC fused salt transformer are conical cylindrical probe (6,7) melt body inside with vertical insertion of a determining deviation, when furnace temperature departs from optimum value, regulate two probe degree of depth and probe spacing, keep best electrolysis temperature with internal heating, the Globar (8) of outer heating is standby, thereby reaches desirable electrolysis effectiveness.

Claims (1)

1. a novel molten salt electrolyzer is characterized in that anode has cast-iron pot overcoat (1), and liner is plumbago crucible (2), and semisphere porcelain crucible (3) is inlayed in its bottom, fills liquid aluminium (4) in it; Molybdenum cathode collector bar (5) overcoat porcelain sleeve inserts in the liquid aluminium; Two lower ends are conical cylindrical probe (6,7) melt body inside with vertical insertion of a determining deviation, the Globar (8) of outer heating is standby, to reach desirable electrolysis effectiveness.

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