发明名称 |
METHOD FOR TREATING LIQUID EFFLUENTS AND RECOVERING METALS |
摘要 |
A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase (10); the method for treating liquid effluents and recovering metals further comprising the following steps: d) addition of a 50 to 250 g/L amine solution to the liquid phase (10) precipitating magnesium in the form of magnesium hydroxide (Mg(OH)); and e) recovery of amine by stripping and rectification. |
申请公布号 |
EA023878(B1) |
申请公布日期 |
2016.07.29 |
申请号 |
EA20130090226 |
申请日期 |
2011.08.09 |
申请人 |
VALE S.A. |
发明人 |
EVELIN SALOMAO, SOLINO;SILVA ROBERTO, MATTIOLI;DA SILVA GERALDO, LUIZ;DE SOUZA CLAUSON |
分类号 |
C22B3/20;C02F1/62;C02F103/10;C22B26/22 |
主分类号 |
C22B3/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|