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(PDF) CFD Modeling of Zinc Extraction via Slag Fuming in …

The zinc content in these depends largely on the type of concentrate and residue materials, method of extraction and equipment used. Slag fuming is basically a secondary operation which is an important unit operation in the extraction of non-ferrous metals. Slag fuming has been used since 1930s to recover zinc from lead blast furnace slag [1].

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Computational Fluid Dynamics (CFD) Investigation of …

A thin-slice computational fluid dynamics (CFD) model of a conventional tuyere blown slag-fuming furnace has been developed in Eulerian multiphase flow approach by employing a three-dimensional (3-D) hybrid unstructured orthographic grid system. The model considers a thin slice of the conventional tuyere blown slag-fuming furnace to investigate …

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Zinc Residue Fuming Process in Side-Submerged …

is divided into two stages: SSC melting and fuming furnace fuming. SSC uses high oxygen-enriched combustion. Fuel combustion provides heat while maintaining a weak reductive atmosphere in the furnace, so as to save energy consumption. In the fuming stage, only hot slag is treated, and the heat consumption is mainly lead and

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Slag fuming | metallurgy | Britannica

Other articles where slag fuming is discussed: silver processing: From zinc concentrates: This is processed by slag fuming, a process whereby the residue is melted to form a slag through which powdered coal or coke is blown along with air. The zinc is reduced to the metallic form and is vaporized from the slag, while the lead is converted to the…

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llustration of zinc and lead fuming within an Ausmelt furnace …

(slag) + C 2FeO + CO (g) Figure 1 below gives an illustration of the zinc fuming within an Ausmelt furnace. The lance delivering fuel, oxygen and air combusts in the reaction zone of the slag ...

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Slag Fuming Furnaces Recover Zinc and Lead From …

The zinc, after fuming out of the slag, is carried out of the fuming furnace through a Babcock & Wilcox boiler and economizer, then through gas cooling tubes, to a Northern Blower baghouse. …

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Study on performance and mechanism of ed ceramics …

This paper proposes a new method for preparing lightweight and thermally insulated ed ceramics via direct high-temperature ing using lead fuming furnace slag as the major material, quartz sand as the texturizer, borax as the flux, and AlN as the ing agent. The effects of the chemical composition and sintering process parameters on the crystalline …

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Improved Settling Mechanisms of an Industrial Copper Smelting Slag …

Materials. Industrial slag modification occurred batchwise in a fuming furnace where electric smelting furnace slag was treated under reducing conditions to recover zinc [].After finalizing the process, the slag was tapped with a slag runner from the fuming furnace into a settling furnace, where the slag was held as entrained copper droplets settled.

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(PDF) Slag Fuming Process – A Review

The advantages of processing lead and tin in fuming furnace are as follows: The heat of molten slag can be used, metal recovery rate and productivity are enhanced, operation …

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National Technical Reports Library

Progress in tin smelting and process technology at the smelter of the Yunnan Tin Corporation is described together with practical experience in reverberatory furnace treatment of medium-grade concentrates. By introducing a fuming process for treating rich slag in place of a blast-furnace process the separation of tin from iron has been solved.

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An Updated Reactive Fraction Model to Simulate the Zn Slag Fuming

Zn slag fuming technology is widely used for the disposal of Pb and Zn blast furnace slags to recover valuable metals. In this work, an updated reactive fraction (URF) model is developed and ...

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Clean recycling of Zn-bearing slags by a plasma fuming …

A pilot trial was conducted in a plasma-fuming furnace, and thermodynamic calculations were performed to identify optimal operating parameters. ... Slag fuming is a traditional technology for the treatment of Zn-bearing slags [10], [11]. In this process, oxides, such as zinc oxide (ZnO) and lead oxide (PbO), are reduced by various reductants ...

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Fuming of Zinc from Lead Blast Furnace Slag

range used in the slag-fuming process. The equilib­ rium constants were available, but the zinc oxide­ activity data were not. It was decided to calculate zinc oxide activities from carefully controlled zinc­ elimination runs made in the No. 2 slag-fuming furnace of the Trail Smelter. The method of treat­ ing the data follows:

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Zinc Fuming from Lead Blast Furnace Slag

Laboratory studies have been carried out to recover zinc from an industrial lead blast furnace slag using carbon as an external reducing agent. Experiments were conducted at 1573 Κ with and …

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Evaluation of Zinc Fuming Furnace Fugitive Emissions Bunker Hill …

The slag from zinc fuming furnace is tapped into a gas-fired holding furnace where copper matte and waste slag are separated. The total cycle time for the process is about 165 minutes. A process flow diagram of the zinc fuming plant, prepared during …

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CFD modelling of slag fuming, with focus on freeze …

dynamic within the slag bath, as indicated by the streamlines in Figure 3: c2. This dynamic flow is crucial for distributing heat across the slag bath and enhancing slag fuming efficiency. No splash-induced FL formation occurs on the freeboard. In the slag bath region, the FL thickness starts to increase in certain areas to 0.8 cm.

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Zinc Fuming from Lead Blast Furnace Slag

Reddy et al. [13] investigated the kinetics of zinc fuming from lead blast furnace slag with iron oxide and carbon. Since several authors widely discussed the benefits of slag bath agitation on ...

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A Computational Fluid Dynamic Modeling Study of Slag …

Abstract—Slag fuming is a process of extracting zinc from molten slag in the form of metal vapor by injecting or adding a reducing source such as pulverized or lump coal, natural gas, ... since 1930s to recover zinc from lead blast furnace slag [1]. It is mostly a batch process, in which a reducing mixture of air

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Computational Fluid Dynamic Modeling of Zinc Slag …

freeze linings for slag fuming furnaces. The effect of sulfur on the rate of reduction of zinc oxide from slags was studied by Dal and Rankin.[15] Subsequent industrial studies have followed the ...

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The Recovery of Pb and Zn in Antimony Smelting Slag

In accordance with slag assay, zinc and lead in fuming furnace slag are largely reduced comparing with feeding materials. When 16 t (dry base) materials are fed into fuming furnace for each campaign, 13 t slag is produced, 1.3 t dust is collected from bag filter and surface cooler, and 0.6 t dust is collected from boiler.

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DC electric furnace-fuming furnace combined tin-smelting …

The invention relates to a tin-smelting process, in particular to a method for tin smelting by combining a DC electric furnace and a fuming furnace and for comprehensively recycling iron. The steps of the invention are as follows: reducing agent is added according to the components of tin concentrate, and then, the mixture is put in the DC electric furnace for reduction and smelting …

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SLAG FURNACES -SOME ISSUES FOR OPTIMAL …

Slag cont aining furnaces ar e important metallurgical vessels for smelting, converting and slag cleaning. Sla g furnaces are us ed in th e processing o f iron and ferroalloys [1], as well as non-

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OneMine | Continuous Fuming of Zinc-Containing Slags

"The slag fuming process has operated for close to 70 years to recover zinc from lead blast furnace slag. The process is normally carried out through the batch treatment of slag by submerged injection of coal and air. Within the bath the coal acts as both a reductant, to reduce Zno to zinc vapour, and a fuel, to maintain bath temperature during the endothermic reduction …

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The QSL Lead Slag Fuming Process Using an Ausmelt Furnace

The QSL Lead Slag Fuming Process Using an Ausmelt Furnace. Myung Bae Kim, Myung Bae Kim. Korea Zinc Co., Ltd. 142 Nonhyun-Dong, Seoul 135–749, Korea. Search for more papers by this author. Woll Seung Lee, Woll Seung Lee. Korea Zinc Co., Ltd. 142 Nonhyun-Dong, Seoul 135–749, Korea.

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The Process and Application of Oxygen-Enriched Air Side

The slag is discharged from the slag tap into the fuming furnace, and the lead alloy is discharged from the siphon mouth at the end of the furnace. The carbon monoxide produced in the furnace is oxidized by the secondary air blown in hearth the space. The high-temperature fume is cooled in waste heat boiler, purified and dedusted by the bag ...

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CFD modelling of slag fuming, with focus on freeze …

Slag fuming (SF) is a critical process for recycling zinc-containing slags, but the corrosive nature of molten slag poses challenges to the reactor durability. The freeze-lining (FL) technique …

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Computational Fluid Dynamics (CFD) Investigation of …

As mentioned by Richards et al.,[1] the slag-fuming furnace of company D has a length of 4.57 m and width 2.44 m (4.57 9 2.44 m2), containing 30 tuyeres with 56 mm ID for each tuyere. Because of the computational time limitations, the current study dealt with a thin-slice model with two opposing sets of tuyeres. A slice of 0.3 m length was ...

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Plasma-driven Slag Fuming from Industrial Process Residue

Slag fuming process is used to extract zinc from the lead blast furnace slags and recently for the extraction of multiple elements from the complex primary and recycling feed streams, making the ...

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CFD modeling of slag fuming, with focus on freeze …

Keywords: fuming furnace, freeze lining, CFD simulation, VOF model, mixture continuum model . ABSTRACT Slag fuming (SF) is a critical process for recycling zinc-containing slags, but the corrosive nature of molten slag poses challenges to the reactor durability. The freeze-lining (FL) technique offers a

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Development and Application of a Computational Fluid …

Schematic of the batch-type, plasma-driven slag fuming furnace. The flow dynamics observed during the slag fuming process are shown in Figure 5a. The blue iso-surface, representing the slag/gas interface, illustrates the splashing motion of the molten slag across the freeboard. The splashing events are caused by the interaction between the hot ...