Industrial isolation of the Cadmium Sulphate solution (273-721-3) from Cadmium and/or Cadmium compounds leaching, refining or extraction steps, by settling, filtering and other hydrometallurgical processes. Cadmium metal cake or cadmium compound bearing scrap is grinded and leached in order to produce cadmium sulphate solution.
Stockpiling of the primary Cd-material (Cd-metal cake and Cd-bearing recycled scrap) in closed and well ventilated buildings. Feeding of the primary materials into the mixing tank. The leaching reaction with sulphuric acid solutions is kept at the proper temperature and proper pH (~4.2). Filtration of the leach-residue occurs on press-filters, under ventilated hood. Oxidation of some of the present elements may be necessary (i.e. Te > TeO2 or others), followed by another filtration step, if necessary. Further transfer of the Cadmium sulphate solution occurs by pipes or  in specially designed transfer units that prevent any exposure.
Industrial use of the Intermediate Cadmium Sulphate solution (273-721-3) is in the ultimate manufacturing of Cadmium or Cadmium compounds by several metallurgical processes.
The Cadmium sulphate solution is unloaded, potentially mixed with other solutions or reagents and transferred to the reaction vessels through especially designed transfer launders. In hydrometallurgical uses, the mixture is continuously fed to leaching tanks (closed loop of acidic solution, mostly sulphate) used in the production of Cadmium salt. For pyrometallurgical uses, it is first precipitated and transferred as a solid residue to furnaces, i.e. Imperial Smelting Furnace, Blast furnace, distillation device, used in the smelting and extraction of cadmium metal (EC 231-152-8).

Electrolytic solution of cadmium sulphate consisting primarily of cadmium sulphate and possibly sulphuric acid.

Serious eye damage / eye irritation

Skin sensitisation

Respiratory sensitisation