| 摘要 |
The invention relates to a process for the preparation of phosphoric-acid-containing solutions, in which process the solution is converted into a solid by adding aluminium compound. Said solid can readily be disposed of since it is not water-soluble. Said process is particularly suitable for preparing phosphoric-acid-containing solutions from metal processing. The invention also relates to a device (10) for carrying out the process which has a mixer tube (12) with a longitudinal axis (M), an inlet (14) and an outlet (16). In a central area, at least two fluid feed nozzles (18 and 20) open into the mixer tube inlet (14) and in relation to the inlet cross section thereof. At least one gas feed nozzle (22) arranged radially outside the fluid feed nozzle (18 and 22) also opens into the mixer tuber inlet (14). The longitudinal axis (G) of each gas feed nozzle (22) is inclined to the central longitudinal axis (M) in such a manner that the said axes do not intersect. The angle between each longitudinal axis (G) and the central longitudinal axis (M) is at least 5 degree .
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