A method for producing copper sulphate monohydrate

C - Chemistry – Metallurgy – 01 – G

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C01G 3/10 (2006.01)

Patent

CA 2235874

Small pieces of metallic copper waste are leached in 10 % sulphuric acid while simultaneously hydrogen peroxide is added as a catalyst. Leaching is performed until the pH of the solution is constant (5.0 - 5.5). The lixivium is settled, filtered through a mud-press, concentrated by heating, evaporating and occasional pumping of the new solution until a required concentration of copper of 150g/1 is reached. The input solution is transferred to the dusting assembly which sprays the solution at high revolution through jets onto the walls of drying chamber. The generated product is hammers by hammers from the walls and sucked with a blower through a cyclone into a reservoir. The input temperature of the drying chamber is maintained at 230 °C and output temperature at 110 °C.

De petits morceaux de cuivre métallique résiduel sont soumis à un lessivage dans de l'acide sulfurique à 10 % pendant que du peroxyde d'hydrogène est ajouté simultanément comme catalyseur. Le lessivage est effectué jusqu'à ce que le pH de la solution soit constant (5,0 - 5,5). Après avoir laissé le lixiviat se déposer, ce dernier est filtré à travers une presse à boues, concentré par chauffage, évaporation et pompage intermittent de la nouvelle solution jusqu'à ce qu'on atteigne la concentration requise de cuivre de 150g/l. La solution d'alimentation est transférée au système de pulvérisation qui projette la solution à travers des gicleurs, à une grande vitesse de rotation, sur les parois d'un compartiment de séchage. Le produit obtenu est enlevé des parois à l'aide de marteaux et aspiré par un ventilateur de type cyclone jusque dans un réservoir. La température à l'entrée du compartiment de séchage est maintenue à 230 degrés C, et celle à la sortie à 110 degrés C.

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