{"id":8922,"date":"2022-06-27T14:21:28","date_gmt":"2022-06-27T14:21:28","guid":{"rendered":"https:\/\/fq1p00siar.wpdns.site\/prix-du-meilleur-article-de-la-section-pyrometallurgie-des-metaux\/"},"modified":"2024-10-31T14:27:26","modified_gmt":"2024-10-31T14:27:26","slug":"prix-du-meilleur-article-de-la-section-pyrometallurgie-des-metaux","status":"publish","type":"page","link":"https:\/\/metsoc.org\/fr\/prix-du-meilleur-article-de-la-section-pyrometallurgie-des-metaux\/","title":{"rendered":"Prix du meilleur article de la Section pyrom\u00e9tallurgie des m\u00e9taux"},"content":{"rendered":"\t\t
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Prix du meilleur article de la Section pyrom\u00e9tallurgie des m\u00e9taux<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Le Prix du meilleur article de la Section pyrom\u00e9tallurgie des m\u00e9taux a \u00e9t\u00e9 cr\u00e9\u00e9 pour r\u00e9compenser le meilleur article publi\u00e9 sur ce sujet dans le Journal de l\u2019ICM, dans le Canadian Metallurgical Quarterly ou des d\u00e9lib\u00e9rations de la Conf\u00e9rence des m\u00e9tallurgistes de l\u2019ann\u00e9e pr\u00e9c\u00e9dente. La Section s\u00e9lectionne le meilleur article et le sous-comit\u00e9 de remise de prix examine les nominations.
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\nCe prix n\u2019est pas ouvert aux nominations du public.<\/b> Le prix est administr\u00e9 par le comit\u00e9 de la section de MetSoc. <\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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2024 laur\u00e9ats<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Solving the Loss of Arc (LOA) Problem and Its Furnace Process Implications at Koniambo Nickel SAS
<\/strong><\/em>Jonathan Spring, Piet Swart, Ron Schonewille, Fred Greyling, and Gerrit Liebenberg<\/p>\n

Presented at COM 2024, \u00ab\u00a0Extractive Metallurgy from Conception to Operation: Experimentation, Simulation, Pilot, and Ramp-up\u00a0\u00bb Symposium (ID# COM24019)<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The two twin-electrode DC furnaces at Koniambo Nickel SAS (KNS) have suffered from a loss of arc (LOA) problem since commissioning. LOA manifests itself by the sudden extinguishing of the electric arc between the electrode tip and slag bath. LOA occurred randomly with no clear correlation to process parameters. Lost power from LOA led to large fluctuations of the power to feed ratio in the furnace. The inability to run at stable high power and frequent stoppages to correct power to feed imbalances were the main barrier to achieving the nominal furnace design production rate. Heuristic process levers were developed to reduce the occurrence of LOA. None showed systematic, reproducible benefits to LOA reduction and the root cause remained unknown. Bench scale tests were run which clearly and reproducibly showed the events leading up to LOA. These events are explained using electromagnetic theory. The LOA problem was solved by reversing the polarity of one electrode which converts the attractive force experienced by the arcs into a repulsive force. Both furnaces were converted to this new configuration by the physical rotation of the rectifier thyristors of one electrode. Following the change, LOA frequency was drastically reduced. Furnace power setpoints above 100 MW are now readily achieved with no need for constant process parameter adjustments. The increased electric stability has led to increased process stability with no negative consequences to furnace integrity. <\/p>\n<\/div>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Kinetic Study in Selection Reduction of Limonitic and Saprolitic Nickel Ore<\/strong><\/em><\/p>\n

Bambang Suharno, Fajar Nurjaman, Soesaptri Oediyani, Anton Sapto Handoko, Fathan Bahfie, Abdul Fathir Qaulanhaq, Widi Astuti and Erik Prasetyo<\/p>\n

Published in The Canadian Metallurgical Quarterly. Volume 63 – Issue 3 <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Saprolite and limonite have different behaviour in the carbothermic reduction process due to the differences in their atomic structures. This work investigates the kinetic study of these two different kinds of lateritic nickel ores. Nickel ore, coal, sodium sulfate, and calcium oxide were mixed, then pelletised into 10\u201315 mm diameters. The pellets were reduced with a non-isothermal condition using a muffle furnace at 950\u20131150 \u00b0C for 5\u2013120 min. The reduced pellets were crushed into less than 74 \u00b5m prior to the wet magnetic separation process to obtain concentrates (ferronickel) and tailings (impurities). The result showed that the reduction rate for both lateritic nickel ores increased with the increase of reduction temperature and holding time. The Ginstling-Brouhnstein model was appropriate to describe the diffusion mechanism of the reduction process of limonite and saprolite. The activation energy in the reduction of limonite was lower than in saprolite. It indicated that the iron and nickel in magnesium silicate in saprolite have lower reducibility than the oxide structure in limonite. Modifying basicity in nickel laterite with CaO addition could also reduce the activation energy. <\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Laur\u00e9at 2023<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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H2 injection in molten metal
<\/b><\/i>Author: Torben Eden, Aurubis<\/i><\/p>\n

Presented at COM 2022, \u00ab\u00a0Deep Decarbonization Pathways for Pyrometallurgical Processes: Opportunities & Challenges\u00a0\u00bb symposium<\/i><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The deoxidation of copper or \u201cpoling\u201d is the final step in the pyrometallurgical process of primary and secondary copper extraction. The deoxidation generates CO2<\/sub> since gaseous and liquid hydrocarbons (natural gas) are the common choice for reducing agents. Previous energy and cost saving measures increased the efficiency of the process, but the inherent production of CO2<\/sub> cannot be avoided. The use of hydrogen as a reductant may decarbonise a core process of copper production, which is a desirable target for the metal industry in general and Aurubis in particular. <\/p>\n

The primary smelter in Hamburg runs two anode furnaces with a capacity of 270 t per batch each. From September to December 2021, the anode furnaces were provisionally supplied with hydrogen and 14 batches were poled using hydrogen. These experiments were designed to determine in full scale operational tests the properties of the poling with hydrogen in terms of efficiency and process control. <\/p>\n

The average efficiency of poling with hydrogen was higher than poling with natural gas. The adjustment of the volume flows and the temperature control of the process was always controllable. The end point of the poling with hydrogen could be determined similarly to the poling with natural gas based on the temperature curve. <\/p>\n

The tests showed the importance of nitrogen addition for stable jetting conditions where clogging of the tuyeres was a phenomenon observed when pure hydrogen was used. An important observation from the tests was that the efficiency of the reduction was not affected by the addition of nitrogen. <\/p>\n

This paper will discuss in detail and share the learnings of full-scale polling tests in the Hamburg anode furnace and discuss requirements for its introduction into the daily production.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Laur\u00e9at 2022<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Recycling Ferronickel Concentrates as an Iron Source to Extract Nickel from Nickel Sulphide Concentrates
<\/strong><\/em>Fanmao Wang, Sam Marcuson, Mansoor Barati and Leili Tafaghodi<\/p>\n

Pr\u00e9sent\u00e9 \u00e0 COM 2021-WALSIM symposium<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The conventional nickel extraction from sulphide nickel ore consists of smelting and refining, producing high purity metallic nickel products. The limit of the traditional extraction process is the significant cost of SO2 abatement, disposal of by-products (e.g., slags), and complex refining treatment. With the interest of reducing SO2 emissions and simplifying the extraction process, the authors investigated a solid-state (800 oC) thermal treatment of nickel sulphide concentrates in the presence of metallic iron under a neutral atmosphere. The results showed that approximately 97% of Ni was extracted into ferronickel (FeNi) particles with d80 = 45 \u00b5m. Recycling these FeNi particles as an iron source yielded new FeNi precipitations in the sulphide matrix with d80 = 20 \u00b5m. The Ni concentration in the resulting sulphide phase was in the range of 1\u20133 wt%. Optimization is required to use the recycled FeNi particles as seeds to increase the size of newly precipitated alloy particles.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Trace Element Distributions Between Matte and Slag in Direct Nickel Matte Smelting<\/em><\/strong>
Sukhomlinov, D., Klemettinen, L., Virtanen, O., Lahaye, Y., Latostenmaa, P., Jokilaakso, A., & Taskinen, P.<\/p>\n

(2020) Canadian Metallurgical Quarterly, 59(1), 67-77.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Abstract: The behaviour of trace elements in the nickel matte smelting was studied at 1673 K (1400\u00b0C) by equilibration-quenching techniques followed by direct phase analyses using electron probe X-ray microanalysis and laser ablation inductively coupled plasma-mass spectrometry. The matte-slag samples at silica saturation were equilibrated with SO2-CO-CO2-Ar mixtures of fixed pSO2, pS2 and pO2 in order to obtain a pre-determined oxidation degree for the sulphide matte, and thus to
generate a targeted iron concentration of the nickel-copper\u2013iron sulphide matte (Ni: Cu = 5, w\/w), depending on the slag chemistry. The slag composition was varied from 0 to 2 wt-% K2O and 0\u201310 wt-% MgO in silica saturation. The studied trace elements were Co, Ge, Pb, Se and Sn, but also the matte-to-slag distributions of the slag forming fluxing components Mg (MgO) and Si (SiO2) were determined experimentally. Selenium was the only trace element studied which strongly enriched in the low-iron nickel mattes, and the deportment became larger when the sulphide matte depleted with iron. All the other trace elements behaved in the opposite way.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Prix du meilleur article de la Section pyrom\u00e9tallurgie des m\u00e9taux Le Prix du meilleur article de la Section pyrom\u00e9tallurgie des m\u00e9taux a \u00e9t\u00e9 cr\u00e9\u00e9 pour r\u00e9compenser le meilleur article publi\u00e9 sur ce sujet dans le Journal de l\u2019ICM, dans le Canadian Metallurgical Quarterly ou des d\u00e9lib\u00e9rations de la Conf\u00e9rence des m\u00e9tallurgistes de l\u2019ann\u00e9e pr\u00e9c\u00e9dente. La […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"iawp_total_views":0,"footnotes":""},"class_list":["post-8922","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/pages\/8922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/comments?post=8922"}],"version-history":[{"count":6,"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/pages\/8922\/revisions"}],"predecessor-version":[{"id":13636,"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/pages\/8922\/revisions\/13636"}],"wp:attachment":[{"href":"https:\/\/metsoc.org\/fr\/wp-json\/wp\/v2\/media?parent=8922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}