| abstract |
According to the invention, the sludge and gaseous effluents from the production of phosphorus are treated with an aqueous solution of copper sulphate II with a concentration of 15 to 50% by weight, at a temperature of 20 to 80 degrees C and two products are obtained, a solid and a liquid. The solid product, mainly containing copper phosphide and fluorides, and alkali metal and silicon chlorides and calcium and aluminum silicates, can be used as a modifier and refiner of hypereutectic alpaxes and also serves to obtain a phosphorus alloy. -copper. The liquid product, containing phosphoric and sulfuric acids and copper II sulfate, is used to obtain copper fertilizers |