TY - GEN
T1 - Design, construction and operational results of a pilot plant for the treatment and valorization of pickling waste solutions
AU - Cipollina, Andrea
AU - Gueccia, Rosa
AU - Micale, Giorgio Domenico Maria
AU - Randazzo, Serena
PY - 2021
Y1 - 2021
N2 - An innovative hybrid technology for both minimizing the waste production and optimizing the pickling process through the continuous control of pickling baths composition has been proposed by means of a pilot-plant installed at the Tecnozinco Srl, Carini (PA) hot-dip galvanizing plant. The recovery process has been accomplished by coupling a diffusion dialysis (DD), where HCl is recovered, a membrane distillation (MD), where HCl is concentrated, and a reactive precipitation (RP), where metal ions are recovered as iron hydroxide and ammonium/zinc chloride solution, to be used in the fluxing baths of the plant. The pilot plant was commissioned and operated using synthetic HCl solutions first and, then, real pickling liquors. Results of the long-time automatic mode operations have proven the operational stability and performance of the demonstrator. A high acid recovery of 80% and iron hydroxide with 99% of purity were achieved.
AB - An innovative hybrid technology for both minimizing the waste production and optimizing the pickling process through the continuous control of pickling baths composition has been proposed by means of a pilot-plant installed at the Tecnozinco Srl, Carini (PA) hot-dip galvanizing plant. The recovery process has been accomplished by coupling a diffusion dialysis (DD), where HCl is recovered, a membrane distillation (MD), where HCl is concentrated, and a reactive precipitation (RP), where metal ions are recovered as iron hydroxide and ammonium/zinc chloride solution, to be used in the fluxing baths of the plant. The pilot plant was commissioned and operated using synthetic HCl solutions first and, then, real pickling liquors. Results of the long-time automatic mode operations have proven the operational stability and performance of the demonstrator. A high acid recovery of 80% and iron hydroxide with 99% of purity were achieved.
UR - http://hdl.handle.net/10447/474872
M3 - Conference contribution
SN - 9788898990214
BT - ATTI DEL 38° CONVEGNO NAZIONALE AIM
ER -