PbZn 2020: The 9th International Symposium on Lead and Zinc Processing: PbZn Process Fundamentals II
Sponsored by: The Mining and Materails Processing Institute of Japan, Nonferrous Metals Society of China, GDMB: The Society for Mining, Metallurgy Resourcce and Environmental Technology, Metallurgy & Materials Society of the Canadian Institute of Mining, Metallurgy & Petroleum, TMS Extraction and Processing Division, TMS: Hydrometallurgy and Electrometallurgy Committee, TMS: Process Technology and Modeling Committee, TMS: Pyrometallurgy Committee, TMS: Recycling and Environmental Technologies Committee
Program Organizers: Andreas Siegmund, LanMetCon LLC; Shafiq Alam, University of Saskatchewan; Joseph Grogan, Gopher Resource; Ulrich Kerney, Recylex; Cheng Liu, China Enfi Engineering Corporation; Etsuro Shibata, Tohoku University
Tuesday 2:00 PM
February 25, 2020
Room: 14B
Location: San Diego Convention Ctr
Session Chair: Alexandra Anderson, Gopher Resource
2:00 PM
An Overview of Technology Developments in Zinc Processing Around the World: R. Warner1; A.E.M. Warner2; Phillip Mackey2; 1Nyrstar Sales & Marketing AG; 2Worley
With growing demand, the outlook for zinc has generally trended upward. Zinc processing technology is also on the move. This paper provides a brief overview of technology developments in the processing of zinc.
2:20 PM
Lead and Zinc Extractive Metallurgy Research in the Kroll Institute for Extractive Metallurgy: Patrick Taylor1; 1Colorado School of Mines
The Kroll Institute for Extractive Metallurgy has performed graduate research in zinc and lead extractive metallurgy over its history. The paper presents an overview of some of the past and current research on this topic: this includes: galena leaching with fluosilicic acid; recovery of lead and zinc from river bed tailings by ferric chloride leaching; soda ash reduction of galena; characteristics of sodium-iron-silicate slags,; computational fluid dynamic modeling of a secondary lead reverberatory furnace; vacuum distillation of complex lead bullion; hydrogen partial reduction of zinc ferrites; and evaluation of zinc process jarosites, ferrites and leach precipitates for by-product recovery.
2:40 PM
Leaching of Turkish Oxidized Pb-Zn Flotation Tails by Inorganic and Organic Acids: Muammer Kaya1; Sait Kursunoglu2; Shokrullah Hussaini1; Erkan Gul1; 1Osmangazi University; 2Abdullah Gul University
Secondary metals are critical and beneficial supplements to primary metal production. Presently, economical and environmental requirements impose the development of effective and inexpensive recycling methods for valuable metals from secondary sources. Management of Pb-Zn flotation tailings is one of the major challenges worldwide. Huge quantities of Pb-Zn oxide flotation tails can pose both a potential environmental threat (Pb, Cd, As, etc.) and attractive secondary resource of metals (Zn, Pb).Physical separation and flotation of Pb-Zn oxidized wastes are very difficult. Pb is concentrated by flotation; but, Zn remains in the tails, due to complex mineralogy and fine size. These tails can be beneficiated by hydrometallurgical methods. In this study, leaching behaviour of Turkish Pb-Zn flotation tails were carried out by some inorganic and organic acids with and without oxidants/reductans. The effects of lixiviant type and concentration, temperature and time and S/L ratio on more than 90% metal dissolutions were determined.
3:00 PM
Characterization of Phase Equilibria and Thermodynamics with Integrated Experimental and Modelling Approach for Complex Lead Primary and Recycling Processing: Evgueni Jak1; Maksym Shevchenko1; Denis Shishin1; Taufiq Hidayat2; Peter Hayes1; 1Pyrosearch, The University of Queensland; 2Formerly: Pyrometallurgy Innovation Centre, The University of Queensland; Currently: Department of Metallurgical Engineering, Bandung University of Science and Technology
Substantial advances have been made in the characterization of phase equilibria and thermodynamic properties of complex multiphase equilibria in gas - slag - matte - metal - speiss - solids systems directly relevant to primary and recycling lead smelting. The present review summarizes some of the outcomes of recent studies of the multi-component multi-phase system containing PbO-ZnO-“Cu2O”-FeO-Fe2O3-CaO-SiO2-S as major components, Al2O3-MgO-Cr2O3 as minor slagging components and As-Bi-Ni-Sb-Sn-Ag-Au-Co as other minor components. The research methodology that has been employed involves the integration of experimental measurement and thermodynamic database development. The target of these fundamental studies is to characterize phase equilibria and thermodynamics of this multi-component system and to develop a thermodynamic database as part of a computer package that can be used to assist in optimization of all stages of the value chain from sintering, smelting and zinc fuming in primary production to complex chemistry processing in recycling. A summary and examples of research outcomes and applications are presented.
3:20 PM Break
3:40 PM
DigMet – Advantage through Know-how and Digital Innovation: Andreas Filzwieser1; Robert Pierer2; Sebastian Michelic2; Matthias Lindthaler1; 1Mettop GmbH; 2qoncept dx GmbH
The concept of Industry 4.0 or smart manufacturing is trying to integrate the automatization pyramid vertically. In practice the metal industry is characterized by the fact, that process control and administration of the plant management are only inadequately implemented. Although machine data and process data are collected, they are not widely used for further process automation and optimization. The metallurgical process control is mainly dependent on the experience of the employees. Data acquisition, data aggregation, data visualization, alarms and notifications, integration of enterprise systems, forms, dashboards and data analysis require a platform or intelligent industrial assistance systems with direct access to all production sites. With the help of these assistance systems a controllable process complexity can be managed without compromising process performance and robustness. Due to the complexity of the metallurgical processes themselves and the variability of the input materials, it is urgently necessary to support the process with modern software solutions for process automation. Our approach is to deal with the possibility of digitizing and optimizing the process route, analyzing this data and simulating it using a combination of machine learning approaches and conventional process simulation. We are closing this gap with our concept called DigMet 1.0, a tailormade software for process control, automatization and optimization for the whole process route.
4:00 PM
Performance and Mechanism of Chlorine Removal in Wastewater by Combination of CuSO4 and Zero-valent Copper: Yongguang Luo1; Hongtao Qu1; Yunhao Xi2; Jingtian Zou3; Te Zhang1; Jing Li2; Tianqi Liao2; Libo Zhang2; 1Kunming University of Science and Technology/Yunnan Chihong Zn&Ge Co., Ltd.; 2Kunming University of Science and Technology/National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology/Key Laboratory of Unconventional Metallurgy, Ministry of Education; 3Kunming University of Science and Technology;National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology;Key Laboratory of Unconventional Metallurgy; Ministry of Education
In this study, we conducted an experimental study and removal mechanism study for chloride ions remove from wastewater by a combination of CuSO4 and copper. Experiments studies have shown that CuSO4 combined with copper completely removes 95.31% of the chloride ions from wastewater with an initial chlorine concentration of 1300 mg/L within only 30 min at the optimum experimental conditions. The optimum experimental conditions are that CuSO4 concentration is 10 g/L, copper concentration is 8.6 g/L and the reaction temperature is 35 °C. The products such as CuCl and copper are characterized by XRD analyses. The CuSO4 added to the wastewater ionizes to form Cu2+, which reacts with the copper to form Cu+. Then a large amount of Cu+ reacts with chloride ions in the wastewater to produce CuCl precipitate. This leads to a decrease in the concentration of chlorine in the wastewater. This study demonstrates that the combination of CuSO4 and copper can quickly and efficiently remove chlorine from waste water.
4:20 PM Cancelled
New Ideas for the Design of Green Smelting Project of Domestic Lead and Zinc Resources: Cui Chen1; Hua Hua1; Min He1; 1CINF Engineering Co,.Ltd
During the past 15 years, the lead and zinc smelting industry has greatly improving the level of technical equipment of the industry,with the enhancement of the ability of sustainable development of the industry. This paper will take the demonstrative lead-zinc smelting process as the example:the innovation and industrialization of zinc-oxygen pressure leaching process；equipment the research and development and upgrading of three-continuous furnace bath smelting technology equipment. All of above is intended to in to establish the two-way transformation between Gold mine and Green mine, just as quoted from Xi Jinping , who focus on both environmental and industrial effect. From this purpose, this paper summarizes and analyses the whole life cycle of the project from investigation and establishment to design and construction, and then to commissioning and operation, and puts forward new ideas for the design of green smelting project of domestic lead and zinc resources.