Sustainable Valuable Metal Recovery from the V–Cr–Fe Ternary Slime via Leaching-Selective Complexation

A new technology of pellet production-drying-chloridizing roasting is proposed for valuable metal recovery from pyrite cinder with high content of lead and zinc. The pyrite cinder, containing 60.15% Fe, 2.02% Pb and 2.15% Zn, was pelletized with addition of 2% bentonite in pan pelletizer. Green balls after drying were roasting at 1100 °C for 60 min with 5 wt % of CaCl2 addition in tube furnace. The results demonstrate that pellets with 61.58% of TFe, lead and zinc volatile ratios of 98.02% and 96.83% were obtained. Key technique is that CaCl2 reacts with lead and zinc compounds and the chloride can be volatilized at moderate temperatures. This new technology can recover the valuable metal fully from pyrite cinder and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of pyrite cinder and extend raw material sourcing for Chinese steel industry.

Download Full-text

Algorithmic Modelling of Advanced Chlorination Procedures for Multimetal Recovery

Metals ◽

10.3390/met11101595 ◽

2021 ◽

Vol 11 (10) ◽

pp. 1595

Author(s):

Lukas Höber ◽

Roberto Lerche ◽

Stefan Steinlechner

Keyword(s):

Metal Recovery ◽

Small Scale ◽

Valuable Metal ◽

Reaction Systems ◽

Secondary Conditions ◽

Innovative Process ◽

Valuable Metals ◽

Zinc Industry ◽

Nickel Industry ◽

Simulation Scheme

In the course of developing an innovative process for CO2-optimised valuable metal recovery from precipitation residues accumulating in the zinc industry or nickel industry, the chlorination reactions were investigated. As the basis of small-scale pyrometallurgical experiments, the selected reaction systems were evaluated by means of thermodynamic calculations. With the help of the thermochemical computation software FactSage (Version 8.0), it is possible to simulate the potential valuable metal recovery from residual materials such as jarosite and goethite. In the course of the described investigations, an algorithmically supported simulation scheme was developed by means of Python 3 programming language. The algorithm determines the optimal process parameters for the chlorination of valuable metals, whereby up to 10,000 scenarios can be processed per iteration. This considers the mutual influences and secondary conditions that are neglected in individual calculations.

Download Full-text

Valuable metal recovery from waste tantalum capacitors via cryogenic crushing-alkaline calcination-leaching process

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.12.104 ◽

2021 ◽

Author(s):

Longgong Xia ◽

Wei Xue ◽

Hongjun Wang ◽

Fengchun Ye ◽

Zhihong Liu

Keyword(s):

Metal Recovery ◽

Valuable Metal ◽

Leaching Process

Download Full-text

A novel method for carbon removal and valuable metal recovery by incorporating steam into the reduction-roasting process of spent lithium-ion batteries

Waste Management ◽

10.1016/j.wasman.2021.08.014 ◽

2021 ◽

Vol 134 ◽

pp. 100-109

Author(s):

Qin Peng ◽

Xianqing Zhu ◽

Jun Li ◽

Qiang Liao ◽

Yiming Lai ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Lithium Ion ◽

Metal Recovery ◽

Reduction Roasting ◽

Carbon Removal ◽

Valuable Metal ◽

Roasting Process ◽

Novel Method

Download Full-text

Bioleaching of Valuable Metals from Spent Catalyst Using Metabolic Citiric Acid by Aspergillus niger

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.898.23 ◽

2020 ◽

Vol 898 ◽

pp. 23-28

Author(s):

Himawan Tri Bayu Murti Petrus ◽

Hotden Manurung ◽

Rivky Juarsa Aditya ◽

Rifani Amanda ◽

Widi Astuti

Keyword(s):

Particle Size ◽

Aspergillus Niger ◽

Metal Recovery ◽

Pulp Density ◽

Spent Catalyst ◽

Valuable Metal ◽

Weak Organic Acid ◽

Valuable Metals ◽

Calcium Iron ◽

Leaching Efficiency

Spent catalyst is listed as one of the hazardous wastes. Based on the toxicity characteristic shows that spent catalyst contains some heavy metals at concentration above the regulations limits. This situattion becomes an important issue in nowadays. In this research, fungus Aspergillus niger was investigated to produce weak organic acid (citric acid). Batch experiments were performed to compare the leaching efficiency from spent catalyst of pulp density (2% and 4%) and particle size (212 µm, 150 µm and 75 µm). Result showed that after direct bioleaching process, maximum recovery of valuable metal 24.94%, 7.42%, 1.09%, 3.51%, 4.87% and 1.66% were achieved for aluminum, calcium, iron, copper, silver and platinum respectively at 2% pulp density. Overall data shows that metal recovery at pulp density 2% are higher than 4% pulp density. The maximum recovery based on particle size shows that the smaller particle (75 µm) the higher metal recovery (Al, Ag and Pt) and for some metals was different such as Fe, Cu and Ca.

Download Full-text