Advances in Understanding of Unit Operations in Non-ferrous Extractive Metallurgy 2021

ISBN 10: 3036545735 / ISBN 13: 9783036545738

Published by MDPI AG, 2022

About this Item

Advances in Understanding of Unit Operations in Non-ferrous Extractive Metallurgy 2021 | Buch | Gebunden | Englisch | 2022 | MDPI AG | EAN 9783036545738 | Verantwortliche Person für die EU: Libri GmbH, Europaallee 1, 36244 Bad Hersfeld, gpsr[at]libri[dot]de | Anbieter: preigu Print on Demand.

Seller Inventory # 122747619

Bibliographic Details

• Title: Advances in Understanding of Unit Operations in Non-ferrous Extractive Metallurgy 2021
• Publisher: MDPI AG
• Publication Date: 2022
• Language: English
• ISBN 10: 3036545735
• ISBN 13: 9783036545738
• Binding: Buch
• Condition: Neu
• Dimensions: 250W x 175H x 22D millimeters 250 millimeters width by 175 millimeters height by 22 millimeters depth
• Weight: 865 grams
• Seller catalogs:
  • Bücher

About this title

Synopsis

Unit metallurgical operations processes are usually separated into three categories: 1) hydrometallurgy (leaching, mixing, neutralization, precipitation, cementation, and crystallization); 2) pyrometallurgy (roasting and smelting); and 3) electrometallurgy (aqueous electrolysis and molten salt electrolysis). In hydrometallurgy, the aimed metal is first transferred from ores and concentrates to a solution using a selective dissolution (leaching or dry digestion) under an atmospheric pressure below 100 °C and under a high pressure (40-50 bar) and high temperature (below 270°C) in an autoclave. The purification of the obtained solution was performed using neutralization agents such as sodium hydroxide and calcium carbonate or more selective precipitation agents such as sodium carbonate and oxalic acid. The separation of metals is possible using a liquid/liquid process (solvent extraction in mixer-settler) and solid-liquid (filtration in filter-press under high pressure). Crystallization is the process by which a metallic compound is converted from a liquid into a solid crystalline state via a supersaturated solution. The final step is metal production using electrochemical methods (aqueous electrolysis for basic metals such as copper, zinc, silver, and molten salt electrolysis for rare earth elements and aluminum). Advanced processes, such as ultrasonic spray pyrolysis and microwave-assisted leaching, can be combined with reduction processes in order to produce metallic powders.