Urea-Ammonium Nitrate Aqueous Solutions Containing Cu Micronutrient Obtained from Cable Manufacturing Solid Waste.

Sustainable metal recovery from waste and conversion into Cu-micronutrient-contg. N fertilizers was developed using the HNO3 extn. method. For this purpose, soly. diagrams, i.e., polytherms, were constructed of the ternary CO(NH2)2-Cu(NO3)2-H2O and NH4NO3-Cu(NO3)2-H2O systems to det. the corresponding phase equil. and solid material chem. compn. Cu extn. in the form of water-sol. Cu(NO3)2 was performed from the industrial Cu cable manufg. waste, using HNO3 concns. relevant to the industrial conditions (56-58%) at a moderate temp. of 60°. Waste dissoln. in aq. NH4NO3 solns. resulted in only partial dissoln. of <60% after 30 min. Processes of Cu and Zn micronutrient extn. from solid waste and integration into the existing NH4NO3 and nitrophosphate (NP and NPK) prodn. technologies is proposed via an addnl. HNO3 dissoln. step, combined with the solid unreacted residue removal. [on SciFinder(R)]