Metal precipitation and neutralisation apparatus for metal pickles containing several metals

摘要

Metal precipitation and neutralisation apparatus for metal pickles containing several metals, wherein all the devices required for the metal precipitation and neutralisation are arranged in a compact frost-free vessel resistant to acids and alkalies, a multiplicity of precipitation stages (5), preferably baffle plate thickeners, being arranged in close succession, each precipitation stage being associated with a separate pH measurement point (7) for individual adjustment of the pH, so that a single pass of the metal pickle through the series of precipitation stages suffices for precipitating the various metal salts dissolved in the pickling medium and each of the metal salts settling out in its own precipitation stage, and tanks (2) collecting the metal pickle are provided on either side of the precipitation stages and a filter press (4) is provided at the end of the series of precipitation stages, and the plant comprises a neutralisation part (9) for neutralising the remaining metal pickles. IMAGE