Circulating Fluidized Furnace Gold Ore
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- Circulating Fluidized Furnace Gold Ore
Chapter 24. Roasting of Gold Ore in the Circulating Fluidized-Bed Technology . 1. History of Gold Ore Circulating Fluidized-Bed Roasting Technology; 2. Fluid-Dynamic Background of Roasting and Pilot Testing; 3. Some Advanced Metallurgical and Mineral Applications; 4. Performance of Existing CFB Gold Roasters; 5. Conclusions; Leaching. Chapter 25.
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Compared to the traditional method, the circulating fluidized roasting desulfurization has the advantages of low roasting temperature, good desulfurization effect, and improved dissolution performance of the roasted ore (Tu et al., 2022; Upadhyay et al., 2022). The gas–solid flow characteristics during the cyclic fluidization of bauxite in a ...
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A method for roasting sulphide ores or ore concentrates containing precious metals is practiced in a furnace, typically in a fluidized bed. The ore and a sulphur-binding lime-containing material are supplied to a roasting furnace in which the ore is roasted with the emission of heat and sulphur dioxide. The lime-containing material--such as calcium hydroxide--is mixed into the cooling …
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Subsequently, put 20.0 g pre-prepared samples into corundum porcelain boat and pushed to the tube furnace. A certain amount of air was blasted as soon as the desired temperature was reached. ... Roasting of Gold Ore in the Circulating Fluidized-Bed Technology. Gold Ore Processing (Second Edition), 393–409 (2016), 10.1016/B978-0-444-63658-4. ...
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Circulating fluidized bed for optimal process control (temperature and retention time). External hot gas generator substoichiometric combustion diesel fuel oil. • Reactor dimensions: 3 m, 21 m …
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The motivation of this work is to enhance the long-term frost resistance of circulating fluidized bed fly ash (CFA)-based multisolid waste cementitious material (CSM). In this research, CSM2 is prepared by 30 wt.% …
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The roasting oxidation method of refractory gold ore is the more ancient gold mine preprocess method of gold smelting industry, particularly to sulfur-bearing, contain arsenic, the higher ore of carbon containing, this method can autothermal equilibrium, and can recycle multiple element, is a kind of more satisfactory method.Early stage use rotary kiln baking, many stove roastings, …
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Hydrogen-based direct reduction using fine ore instead of pellets is an alternative to the traditional blast-furnace/basic oxygen furnace (BF/BOF) steelmaking route and to the DR route (CO/H2 based reduction in shaft furnaces using DR …
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DOI: 10.1016/B978-0-444-63658-4.00024-4 Corpus ID: 102315110; Chapter 24 – Roasting of Gold Ore in the Circulating Fluidized-Bed Technology @inproceedings{Hammerschmidt2016Chapter2, title={Chapter 24 – Roasting of Gold Ore in the Circulating Fluidized-Bed Technology}, author={J{"o}rg Hammerschmidt and Jochen H. F. …
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The world's first commercial fluidized bed roasting system was a FluoSolids® unit designed to treat gold-bearing sulfide ore. The technology continued to develop under Dorr-Oliver and now Technip Energies to include a vast array of roasting process applications and reactor designs. Roasting applications y Two-stage roasting of refractory ...
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For double refractory gold ores, the most crucial unit operation is performed by the roaster by creating a high temperature oxidation of the ore. An efficient roasting operation creates a …
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Outside circulating type fluidized bed furnace Applications Claiming Priority (1) Application Number Priority Date Filing Date Title; JP7724888A JPH01247521A (en) : : Outside circulating type fluidized bed furnace Publications (1) Publication Number ...
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fluidized bed reduction furnace ore riser Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number JP6664491A Other languages English (en) Inventor Tetsuaki ...
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DOI: 10.1016/S0167-4528(05)15018-2 Corpus ID: 109241451; Roasting of Gold Ore in the Circulating Fluidized-Bed Technology @article{Hammerschmidt2005RoastingOG, title={Roasting of Gold Ore in the Circulating Fluidized-Bed Technology}, author={J{"o}rg Hammerschmidt and Jochen H. F. G{"u}ntner and Bernd Kerstiens}, journal={Developments in mineral processing}, …
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These Circulating Fluid Bed (CFB) systems, designed by Outotec (formerly Lurgi), are in operation or under construction worldwide for endothermic and exothermic processes. Some …
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A full-cycle numerical simulation of a circulating fluidized bed (CFB) by the use of the computational particle fluid dynamics (CPFD) method has been developed. The effects of the presence or absence of the secondary air, different secondary air positions, and different secondary air ratios on the gas–solid flow characteristics were explored. The results show that …
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Unlike PC furnaces, circulating fluidized bed (CFB) boilers make coal stay in up-blow jets of air during the combustion, largely decreasing NO X release and enhancing the in situ desulfurizing effect. Generally, the PC and CFB furnace temperatures are 1400–1500 °C and 850–900 °C, respectively, forming two different types of fly ash [7,8 ...
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A kind of circulating fluidized bed furnace for pre-reduction of fine iron ore, comprising first, two pre-reducing furnaces and first, two cyclone separators, first pre-reducing furnace is connected to second pre-reducing furnace by second circulation pipe that is formed with the gas supply opening, second pre-reducing furnace is by being formed with the gas supply opening and the …
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roaster gas. Our circulating fluidized bed technology enables the necessary fine control over these parameters. To avoid losses in the leaching plant, it is recommended that whole ores are treated with a gold-roasting step. Due to the low specific heat value of whole ore, it is generally necessary to add fuel to the reactor.
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Gold roasting is a process, applicable to refractory ores and concentrates that contain sulfide sulfur, organic carbon, and potentially arsenic. Removal of these compounds is …
WhatsApp: +86 18221755073For severe refractory gold ores, it was the exclusive pre-treatment process and accordingly, its development is presented in detail, finishing with the most recent technology; oxygenated roasting for whole ores. ... fluidized bed (e.g. DORR-Oliver), circulating fluidized bed (CFB) (e.g. Inco and Lurgi), and oxygenated fluidized bed (e.g ...
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However, existing technologies and equipment (such as shaft furnaces, rotary kilns, and boiling furnaces, and circulating fluidized) are seldom used in industrial production because of their low product quality, high production costs, and potential for generating secondary pollution. ... Roasting of Gold Ore in the Circulating Fluidized-Bed ...
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Fluidized bed technology has the advantages of strengthening mass and heat transfer, enhancing the chemical reaction rate, and at the same time the temperature uniformity in the furnace, which often makes it the preferred choice in metallic ore roasting. The development of fluidized bed roasting technology in the roasting of different types of ...
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In this study, A novel method for gold recovery from refractory gold ore was proposed with the purpose of improving recovery efficiency of gold and reducing …
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Roasting of Gold Ore in the Circulating Fluidized-Bed Technology. J. Hammerschmidt, ... A. Charitos, in Gold Ore Processing (Second Edition), 2016. Abstract. Gold roasting is a process, applicable to refractory ores and concentrates that contain sulfide sulfur, organic carbon, and potentially arsenic. Removal of these compounds is necessary to ...
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Circulating fluidized-bed (CFB) technology has been successfully applied to the roasting of refractory gold ores and concentrates on both pilot plants (200, 350 and 700mm …
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Zhejiang University [42-44] proposed a new technology combining coal-fired power generation and magnetizing roasting, employing iron ores as the bed material of a circulating fluidized bed boiler. Through the circulating fluidized bed apparatus shown in Fig. 6, the magnetizing roasting-magnetic separation test was carried out on an Oolitic ...
WhatsApp: +86 18221755073circulating fluidized bed. However, as the diagram is calculated for ideal spherical, homogeneous particles, it provides only an approximation of the extents of the domains of fluidization for systems in industry. Nevertheless, coupled with experience from industrial Figure 1. Circulating fluidized bed—conceptual drawing
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Circulating fluidized bed (CFB) (e.g., Inco and Lurgi) ... Refractory gold ore treatment by fluidized bed roasting for Barrick Goldstrike. Proceedings, Randol Gold & Silver Forum '99. Randol International, Golden, Colorado (1999), pp. 79-84. View in Scopus Google Scholar. Folland and Peinemann, 1989.
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Chapter 24 - Roasting of Gold Ore in the Circulating Fluidized-Bed Technology. Author links open overlay panel J. Hammerschmidt, J. Güntner, B. Kerstiens, A. Charitos. Show more. ... tellurium and carbon ores. Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide ...
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Request PDF | Roasting of Gold Ore in the Circulating Fluidized-Bed Technology | Gold roasting is a process, applicable to refractory ores and concentrates that contain sulfide sulfur, organic ...
WhatsApp: +86 18221755073By means of pre-reduction of iron ore fines, productivity of a blast furnace can be increased and iron ore unsuitable for sintering process can be easily used in the blast furnace. As a pre-reduction process a circulating fluidized bed (CFB) has been developed with a pilot plant. The riser of CFB is 550 mm in inside diameter and 10 m in height.
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A circulating fluid bed pre-reducing furnace for iron ore powder comprises a first pre-reducing furnace, a second pre-reducing furnace, a first cyclone separator, a second cyclone separator, wherein the first pre-reducing furnace is connected with the second pre-reducing furnace through a second circulating pipe with a gas supply port, the second pre-reducing furnace is connected …
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2.1.1. Raw Materials . The circulating fluidized bed fly ash (CFA)-based multisolid waste cementitious material (CSM) is composed from CFA, Bayer red mud (RM), blast furnace slag (BFS), cement clinker (CC), and a silicon-aluminum-based solid waste (fine blast furnace slag (FBFS)/phosphorus slag (PS)/gasification slag (GS)).
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Arsenious and sulphur-bearing micro-disseminated gold ore is a kind of typical refractory Carlin-Type. The gold in Carlin-Type gold ore grains is distributed finely, existing as invisible or submicroscopic gold, encapsulated in arsenopyrite and pyrite. The technical difficulty of treatment Carlin-Type gold ore lies in how to release the fine gold wrapped in pyrite and …
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Benefits of circulating fluidized bed furnace: High energy density: High specific capacity (per 1 m 3 furnace volume) Excellent heat and mass transfer between gas and solid phase due to high relative velocity; Uniform temperature distribution in furnace
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