Pedosphere-improving granulate, method for producing same, and use thereof

A method for producing a pedosphere-improving granulate (6) comprising:

• a) production of a raw material dispersion comprising at least one inorganic secondary phosphate (1) and at least one reactant (2), the proportion of a liquid phase (4) in the raw material dispersion being greater than 30%, with an incubation time between inorganic secondary phosphate (1) and reactant (2) between 1 to 100 minutes, the secondary phosphate being an incineration ash or a mixture of several incineration ashes comprising heavy metals (7) of at least one of lead, cadmium, nickel, chromium or copper and having a phosphorous content greater than 5% P2O5 and a total organic carbon content of less than 3%,
• b) separation of part of the liquid phase (4) of the raw material dispersion,
• c) granulation, extrusion, or a combination thereof of the remaining raw material dispersion with reduced liquid phase (4),
• d) either recycling the liquid phase (4) separated in process step b) without at least partially separating heavy metal (5) into process step a) to produce a raw material dispersion or at least partially separating heavy metals (7) from the liquid phase (4) separated in process step b) and discharging these heavy metals (7) from the process with subsequent recycling of the low-heavy metal liquid phase (4) to produce a raw material dispersion analogous to process step a) and/or in process step c) and
• e) repeating the process steps a) to d).