The acidic flushing wastewater has a high ferrous ion content, a large amount of lime neutralized sludge, and the discharged wastewater is yellow-red. The market demand for ferric hydroxide water purifiers is small. Produce iron yellow (red) sludge as raw material for pigment factories. : b r>Application example hot-dip galvanizing pickling
: b r>Application example steel pipe pickling
: b r>Application example titanium dioxide pickling
: b r>Application example aluminum foil waste acid
Iron yellow (red) hydrolysis unit