PILOT-PLANT PRODUCTION OF ELECTROLYTIC CHROMIUM ~

The operation of a pilot plant for the production of electrolytic chromium from low-grade domestic ores is discussed, with emphasis on the techniques necessary to produce an adequately pure chromic sulfate electrolyte from the mixture of metal sulfates obtained by acid dissolution of the ore. Equipment flowsheets are included with a discussion of the materials of construction. Since publication of the original paper, improvements have been made in the electrodeposition step to increase the current efficiency and decrease the impurities in the metal. Typical operating data are tabulated for each operation