Process and plant for separating heavy metals from phosphoric starting material
AssigneeOutotec (Finland) Oy
InventorsDirk Lohrberg, Bertold Stegemann, Guenter Schneider, Ludwig Hermann
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Abstract
A process for separating heavy metals from a phosphoric starting material includes, in a step (i), heating the starting material to a temperature between 700 and 1,100° C. in a first reactor and withdrawing combustion gas. In a step (ii), the heated starting material at the temperature between 700 and 1,100° C. is transferred to a second reactor, chlorides of alkaline and earth alkaline metals are added and process gas is withdrawn.
Claims13
1-13. (canceled)
A process for separating heavy metals from a phosphoric starting material, the process comprising:
- (i) heating the starting material to a temperature between 700 and 1,100° C. in a first reactor and withdrawing combustion gas;
- and
- (ii) transferring the heated starting material at the temperature between 700 and 1,100° C. to a second reactor, adding chlorides of alkaline and earth alkaline metals and withdrawing process gas.
A plant for separating heavy metals from phosphoric material comprising:
- a first reactor configured to heat the phosphoric material, the first reactor having at least one line configured to withdraw combustion gas;
- and
- a second reactor configured to mix the heated phosphoric material with chlorides of alkaline and earth alkaline metals, the second reactor having at least one line configured to withdraw process gas.
Dependencies are inferred from the claim text.