Circulation of sodium sulfate solution produced during nimh battery waste processing

A. Porvali, V. Agarwal, M. Lundström

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

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).

Original languageEnglish
Title of host publication2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference
PublisherSociety for Mining, Metallurgy, and Exploration, Inc.
ISBN (Electronic)9781510884663
Publication statusPublished - 1 Jan 2019
MoE publication typeA4 Article in a conference publication
EventSME Annual Conference & Expo - Denver, United States
Duration: 24 Feb 201927 Feb 2019

Publication series

Name2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference

Conference

ConferenceSME Annual Conference & Expo
CountryUnited States
CityDenver
Period24/02/201927/02/2019

Fingerprint Dive into the research topics of 'Circulation of sodium sulfate solution produced during nimh battery waste processing'. Together they form a unique fingerprint.

Cite this