Continuous Fuming of Zinc-Bearing Residues: Part II. The Submerged-Plasma Zinc-Fuming Process

Abstract

A new high-temperature submerged plasma zinc-fuming process has been developed for the treatment of zinc leach residues, electric arc furnace (EAF) dusts, and other zinc-containing waste materials. Continuous operation of this process requires high zinc-fuming rates while retaining vessel integrity through the formation of a stable freeze lining. A zinc-fuming process model using the FactSage thermodynamic databases and ChemApp thermodynamic software has been developed, which simultaneously describes chemical, thermal, and heat-transfer outcomes of this process. The model has been used to systematically investigate the potential effects of operating parameters such as feed composition, fuel/oxygen ratio, electrical power and fluxing parameters on bath temperature, heat loss, Zn concentration and content in slag, Cu concentration, and content in matte.

Thermodynamic Analysis of Zinc Ferrite Decomposition in Electric Arc Furnace Dust by Lime

“…На рис. 2 показано влияние температуры на изменение энергии Гиббса реакций (1)- (3). Как следует из приведенных данных, протекание этих реакций термодинамически возможно.…”

“…Их накопление может привести к тяжелым экологическим последствиям для окружающей среды. Из многообразия [1][2][3][4][5][6][7][8][9][10][11][12][13][14] разработанных в мире технологий для переработки пылей ЭДП наиболее эффективным процессом является вельцевание. По некоторым оценкам, в мировой производственной практике методом вельцевания перерабатывают около 85 % от всего объема вовлеченных в рециклинг пылей ЭДП.…”

Bioleaching and selective biorecovery of zinc from zinc metallurgical leach residues from the Três Marias zinc plant (Minas Gerais, Brazil)

“…Therefore, it is important to design a sustainable recovery strategy that is holistic and integrated in order to improve resource use in an economic and eco‐friendly manner. There are few pyrometallurgical processes (such as Ausmelt technology, ISASMELT TM and submerged plasma zinc‐fuming process) that have been proposed for the utilization of ZLRs and other wastes . However, these processes require high energy and are not attractive from an economic view point .…”

“…There are few pyrometallurgical processes (such as Ausmelt technology, ISASMELT TM and submerged plasma zinc‐fuming process) that have been proposed for the utilization of ZLRs and other wastes . However, these processes require high energy and are not attractive from an economic view point . In recent years, several hydrometallurgical process concepts and hybrid methods have been developed for enhanced recovery of metals from low‐grade ores.…”

Judging Smelting End-Point of Fuming Furnace Using Tertiary Tuyere Flame

“…So a comprehensive recovery should be performed to make full use of the metals in the slags. So far the fuming process is an important smelting technique that is used to deal with the slags and hardbeneficiated mines in metallurgy industry in China [1][2][3]. The accuracy of judging the smelting states especially the smelting end-point of the fuming furnace is an important factor to affect production cost, energy consumption and recovery rate [4][5].…”