公开(公告)号：EP0227626B1

公开(公告)日：1990-04-11

申请号：EP86850442.4

申请日：1986-12-17

申请人： NORZINK A.S.

发明人： Dyvik, Fröystein ,  Miöen, Thomas Konrad

IPC分类号： C25C1/16

CPC分类号： C22B19/22 ,  C22B19/26 ,  C25C1/16 ,  Y02P10/234

公开(公告)号：EP0227626A1

公开(公告)日：1987-07-01

申请号：EP86850442.4

申请日：1986-12-17

申请人： NORZINK A.S.

发明人： Dyvik, Fröystein ,  Miöen, Thomas Konrad

IPC分类号： C25C1/16

CPC分类号： C22B19/22 ,  C22B19/26 ,  C25C1/16 ,  Y02P10/234

摘要： The present invention relates to a method for manufacturing zinc hydrometallur­gically from zinc-containing starting materials. The method comprises one or more leaching stages, one or more solution purifying stages and one or more electrowinning stages for recovering metallic zinc from the leaching solution obtained. The method is operating with a closed solution circuit. A predeter­mined part volume of the solution obtained in the electrowinning stage or stages is withdrawn and concentrated by evaporation so as to precipitate any magne­sium and manganese present in the part volume in the form of metal salt crys­tals. The precipitated crystal mass is separated from the residual liquid phase. The liquid phase in this manner purified with respect to magnesium and manga­nese can be recycled to the leaching process or utilized for some other purpose. When the process is carried out in a sulphate environment, the solution obtained in the electrowinning stage or stages is concentrated to a sulphuric acid concen­tration of at least 60% by weight.
The precipitated crystal mass, which has but a small volume, may be dumped to no disadvantage. In accordance with a preferred embodiment, the crystal mass is re-dissolved in a small quantity of water, thereby enabling practically all the zinc content to be recovered in metallic form, by electrowinning.

公开(公告)号：EP0061407B1

公开(公告)日：1985-07-17

申请号：EP82400522.7

申请日：1982-03-23

申请人： SAMIM S.p.A. ,  AUSTRALIAN MINING AND SMELTING EUROPE LIMITED ,  BILLITON ZINK B.V. ,  ASTURIENNE FRANCE ,  METALLURGIE HOBOKEN-OVERPELT Société anonyme dite: ,  NORZINK A.S. ,  SOCIETE MINIERE ET METALLURGIQUE DE PENARROYA Société anonyme dite: ,  SOCIETA MINARRIA E METALLURGICA DI PERTUSOLA ,  SOCIETE DES MINES & FONDERIES DE ZINC DE LA VIEILLE MONTAGNE S.A.

发明人： Dreulle, Noel

IPC分类号： C23C2/06 ,  C22C18/00

CPC分类号： C23C2/06 ,  C22C18/00

公开(公告)号：EP0061407A1

公开(公告)日：1982-09-29

申请号：EP82400522.7

申请日：1982-03-23

申请人： SAMIM S.p.A. ,  AUSTRALIAN MINING AND SMELTING EUROPE LIMITED ,  BILLITON ZINK B.V. ,  ASTURIENNE FRANCE ,  METALLURGIE HOBOKEN-OVERPELT Société anonyme dite: ,  NORZINK A.S. ,  SOCIETE MINIERE ET METALLURGIQUE DE PENARROYA Société anonyme dite: ,  SOCIETA MINARRIA E METALLURGICA DI PERTUSOLA ,  SOCIETE DES MINES & FONDERIES DE ZINC DE LA VIEILLE MONTAGNE S.A.

发明人： Dreulle, Noel

IPC分类号： C23C2/06 ,  C22C18/00

CPC分类号： C23C2/06 ,  C22C18/00

摘要： Pour ajuster la composition d'un alliage pour la galvanisation au trempé d'aciers, y compris aciers au silicium, avec une composition comprenant des teneurs pondérales exprimées en p.p.m., plomb 1 000 à 15 000, aluminium 100 à 5 000, étain 300 à 20 000, magnésium 10 à 1 000, on ajoute à l'alliage, déficitaire en au moins un additif, des compositions métalliques solubles dans le zinc en fusion et comportant un additif à teneur relativement élevée en suffisance pour compenser le déficit; la composition d'étain est de l'étain pratiquement pur, la composition de magnésium un ternaire zinc, magnésium (5 000 à 50 000 p.p.m.) et aluminium (10 à 500 p.p.m.), et la composition d'aluminium est un binaire zinc aluminium contenant environ 5 % d'aluminium.