A processing method by silicopirohidrolisis, coatings of brascas from Hall-Héroult vats.

摘要

The invention relates to a treatment method SILICOPIROHIDROLISIS OF USED COMING PARTICULARLY electrolysis cells HALL-Heroult AND FORMED a mixture of carbon products and products silico-aluminous, IMPREGNATED COMPOSITE MINERAL FLUORINATED PARTICULARLY OF SODIUM, CALCIUM AND ALUMINUM, cONSISTENT IN TRANSFORMING ESAS BRASCAS by treatment at a temperature at least equal to 1000 degrees C IN THE MIDDLE OF AN OXIDANT GAS WATER VAPOR SILICA - A part in a gas phase, encompassing THE BIGGEST PART OF FLUOR, form hydrofluoric acid and carbon form dIOXIDE AND CARBON MONOXIDE - MOREOVER, a phase at least partially settled with silicon, ALUINIO, CALCIUM AND SODIUM AND MOST OF OTHER IMPURITIES ( iron, titanium, HEAVY METALS ...) form of oxidized compounds, essentially in the form of silicates. The procedure can be launched within a single state, or in two statements, in two successive rectors.