Electro hydrometallurgical process for the extraction of alkaline Zn Powder Electric Furnace

摘要

Comprising: (a) to condition the Moisture of Electric Furnace Dust (between 5% and 10%) for Transport and handling; (b) Leach Said Powder) with an Alkaline solution; (c) to separate the liquid from the washing Gangue Gangue depleted and exhausted; (d) inerting Gangue leaching by treating it with a mixture It contains, on the basis of the bargain Dry: (i) 0.02 5% SiO2 (pozzolanaBentonite or silica gel); (ii) from 0.5% to 3% of 4H2O Ca (H2PO4); and (iii) of 0.2% to 0.8% Ca (OH) 2; leaving the Mass formed with a Moisture content of between 15% and 25% which is mixed in a Team betonera until homogeneous type and Then dried to a Moisture content of 10%; (e) to purify the l (c) iquido CementationTo separate the solid precipitated and washed these Solids; (f) to purify the solution obtained by adsorption of Cementation; (g) to evaporate a fraction of the Purified solution; (H) a fraction of Crystallizing the concentrated solution; (i) evaporate partially Pure solution of (e) and purg AR a fraction obtained from the concentrated solution; (j) electrodepositar zinc from Solution CConcentrated obtained; (k) Separating, washing and drying the zinc deposited; (L) to separate zinc Powder in the solution of zincates m); and wash in Successive stages with soda and Water separated Solids after (b), (e) and (j). The Alkaline solution is subjected to adsorption by Percolation with Ba (OH) 2 to remove arsenic. The lixiviant Solution crystallizes by Evaporation