Improvements in or relating to the Production of Sulphates of Copper or Nickel from Ores and Metallic Minerals.

摘要

116,263. Rigaud, F. May 12, 1917, [Convention date]. Copper and nickel sulphates; salts in general.- In a process and plant for the treatment of minerals for the prcduction of copper and nickel sulphates, the mineral is supplied to the end A of a series of troughs A - - G along which it is moved in the opposite direction to a stream of solvent supplied at B. Part of the solution is concentrated by means of faggots Q and an evaporating pan Q1 and is crystallized in pans R. For the production of sulphurous acid, pyrites or sulphur is burnt in a furnace S and the sulphur dioxide is passed through an externally or internallv watercooled coil X, or a Glover tower, to which is supplied part of the solution from the trough A. Liquor is withdrawn from the coil X at V for supplying the trough at D. The Specification as open to inspection under Sect. 91 (3) (a) refers also to the production of salts in general, and mentions other solvents such as nitric, hydrochloric, or acetic acids, ammonia, benzine, or the like. This subject-matter does not appear in the Specification as accepted.