TY - GEN
T1 - Circulation of sodium sulfate solution produced during nimh battery waste processing
AU - Porvali, A.
AU - Agarwal, V.
AU - Lundström, M.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) by adding Na2SO4 as a precipitating agent. The formed double salts can be treated further with NaOH solution to form REE hydroxides. This study focuses on metamodeling of a simulated flowsheet with design of experiments (DOE). Based on literature survey, a process flowsheet was developed using HSC Sim software. The created flowsheet focuses on circulation of solution containing Na+, K+, SO2-4 ions and impurities liberated in the NaOH treatment of double salt precipitate. The effect of seven parameters (P1-P7) on seven responses (R1-R7) were modeled using central composite design (CCD).
AB - Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) by adding Na2SO4 as a precipitating agent. The formed double salts can be treated further with NaOH solution to form REE hydroxides. This study focuses on metamodeling of a simulated flowsheet with design of experiments (DOE). Based on literature survey, a process flowsheet was developed using HSC Sim software. The created flowsheet focuses on circulation of solution containing Na+, K+, SO2-4 ions and impurities liberated in the NaOH treatment of double salt precipitate. The effect of seven parameters (P1-P7) on seven responses (R1-R7) were modeled using central composite design (CCD).
UR - http://www.scopus.com/inward/record.url?scp=85073001135&partnerID=8YFLogxK
M3 - Conference contribution
T3 - 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference
BT - 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference
PB - Society for Mining, Metallurgy, and Exploration, Inc.
T2 - SME Annual Conference & Expo
Y2 - 24 February 2019 through 27 February 2019
ER -