PbZn 2020: The 9th International Symposium on Lead and Zinc Processing: PbZn Process Technologies
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
Monday 2:30 PM
February 24, 2020
Room: 15B
Location: San Diego Convention Ctr
Session Chair: Camille Fleuriault, Eramet Norway
2:30 PM
Contributions of Non-ferrous Smelters to Metal Resource Circulation in Japan: Etsuro Shibata1; 1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
As the contributions of non-ferrous smelters to metal resource circulation, ores and secondary materials, such as scrap and waste, are treated to recover base metals such as copper, lead, and zinc, as well as other precious and minor metals. One crucial factor that makes this metal recovery possible is the creation of an organic link among copper, lead, and zinc smelters. In recent years, the specialization of non-ferrous smelting companies has been promoted in Japan, and it has become difficult to maintain this close organic link. In addition, in the field of metal resource circulation, the importance of lead smelters should be recognized again. For example, lead smelting acts as an essential destination for copper smelting by-products, such as smelting dusts. Additionally, printed circuit boards that have been treated in large quantities in copper smelters contain metal impurities, such as lead and tin in solder and antimony in flame retardant auxiliaries. When printed circuit boards are treated in copper smelters, excess these impurities may interfere with the copper smelting process and accumulate in by-products. These impurity metals can be recovered effectively in lead smelters.
2:50 PM
Complex Lead and Zinc Feed Treatment through Combining ISASMELT™ and Albion Process™: Stanko Nikolic1; Paul Voigt1; Ben Hogg1; Mike Hourn1; 1Glencore Technology
Lead and zinc processing has always been interlinked due to the natural complexity of their ore-body mineralisations, yet concentrate treatment has traditionally been undertaken in separate facilities producing the major metal of input and a secondary waste stream for storage or disposal. Through the years these facilities have been held captive by market volatility and faced ever stricter review of their by-products, either high zinc containing lead slag or high lead containing residue products. The integrated metallurgical facilities of the world, adopting multi-pyro/hydrometallurgical processes, have thrived in this time. With the right technologies, both lead and zinc can be produced together with the recovery of the contained precious metals. This paper describes how the integration of the Albion Process™, ISASMELT™ and Bottom Blown Oxygen Cupel (BBOC™) technologies provides effective and economic process solutions for the treatment of complex poly-metallic feeds in a combined facility.
3:10 PM
Recent Operation at Hachinohe Smelter: Shojiro Mataoka1; Ushio Enomoto1; Kazuhiko Nishina1; 1Hachinohe Smelting Company Limited
Hachinohe Smelting Company Limited operates a zinc-lead smelter based on the Imperial Smelting Process producing 112,000 t/y of zinc and 40,000 t/y of lead. In 2017, we celebrated the 50th anniversary of the establishment of the company. Raw materials for the smelter comprise a variety of zinc and lead sulfide concentrates, and secondary oxide materials. The secondary materials are treated either in the sinter plant or in the hot briquetting plant. In the smelting furnace, zinc is reduced to zinc vapor and caught by molten lead. Lead and slag are flow out from below the furnace. In addition to zinc and lead, precious metals can be recovered advantageously, which dissolved in crude lead and copper dross. Moreover, this process is particularly resistant to impurity elements such as chlorine and fluorine, which are not good at electrolytic smelting. In this presentation, we will report on recent improvements in our plant.
3:30 PM
Kinetic Aspects of an Innovative Technology for the Reprocessing of ISF Slag: Walter Schatzmann1; Juergen Antrekowitsch1; 1Montanuniversität Leoben
Due to the lack of missing economic technologies, within Europe more than 15 million tons of lead and zinc bearing slag from the ISF process were produced and landfilled within the last one hundred years. These heaps, presenting a potential source of environmental pollution, still contain metals that are not considered for European economy. The paper introduces an innovative solution for the reprocessing of ISF slags to recover valuables (zinc, lead, silver, iron and copper) and convert the clean residual phase into a raw material for construction purposes. Trials using a slag from North Macedonia have been conducted in technical scale, the upscaling is planned for 2020.Furthermore kinetic investigations on the reduction behaviour of zinc and iron in order to improve process efficiency are presented.
3:50 PM Break
4:10 PM
Evaluation and Certification Strategies for Lead-zinc Bearing Residues: Juergen Antrekowitsch1; G Hanke1; 1University of Leoben
While the recycling of metallic scrap is nowadays state of the art, metal-containing by-products from the metallurgical industry represent a new potential secondary resource. Huge amounts of such materials are available worldwide either on dumps or continuously produced. However, their complex composition renders a detailed characterization difficult, resulting in few and weakly developed recycling concepts available to date. To realize this potential in the future more bundled competence is necessary. Montanuniversität Leoben has already developed some expertise in the field of typical by-products such as dust, slags and sludge. Due to the genesis of the primary polymetallic ores, it is especially the metallurgical processes used in the copper, lead and zinc industries that offer a high potential in their by-products. To allow an assessment of these materials a certification system similar to the ones already existing for primary resources needs to be established. This, in turn, will be of major use as a basis for investment decisions and relevant feasibility studies turning these often untouched materials into valuable resources.
4:30 PM
Increasing Plant Efficiency & Capacity: Daniel Jackson1; 1Pyrotek