Coke Injection In To Slag Cleaning

(PDF) Heavy Metal Recovery from Slags of Copper …

The first treatment improved slag cleaning directly in the submerged arc furnace (SAF) using coke injection. The benefit of this process in comparison to the traditional method is that it ...

Copper Smelting Slag Cleaning in an Electric Furnace by

copper slag cleaning in an electric furnace, this study proposed to use waste cooking oil as ... and coke also enters the slag phase to increase the slag amount, and the total copper loss is increased as a result. ... to inject into the slag with the carrier gas. After injection, the lance was slowly raised out of the furnace

Carbon Injection into Electric Arc Furnace Slags

relationship between foam height, carbon injection rate and slag volumes, which predicts the critical injection rate above which foaming become inefficient. The prediction of critical injection rate employs an extension of understanding mechanism ... carbon in the form of coke, char or coal, is injected into the furnace and reacts with slags ...

Thermodynamic analysis of steel slag assisted coke oven gas …

As the world's largest coke producer and consumer, China produced about 473.44 million tons of coke and 2000 billion m 3 of coke oven gas (COG) [8].However, more than half of COG was discharged or direct burned associating with the low energy utilizing efficiency and serious air pollution [9, 10].In order to solve the problem of COG utilization, steam reforming …

Alkaline flux dissociation in blast furnace tuyere 's nest: Part 1

Fig. 13 depicted the phase diagram for the CaO-MgO-Al 2 O 3-SiO 2-FeO, highlighting the original slag in the coal-coke-slag at the tuyere 's nest area of the blast furnace (S0), alongside the slag with target basicities of 0.80 and 1.00 (S1 and S3, respectively), and the interface slag with target basicity of 1.20 (I5).

Model Study of Shaft Injection of Reformed Coke Oven Gas in a …

DOI: 10.1021/ACS.ENERGYFUELS.0C02683 Corpus ID: 224967975; Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace @article{Zhao2020ModelSO, title={Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace}, author={Ziguang Zhao and Xiaobing Yu and Yansong Shen and Yuntao Li and Hui Xu and …

Slag Treatment in the EAF / SAF with Coke Injection

zAt the IME the intensification of slag cleaning of lead/zinc and copper slags in the EAF by coke injection is investigated, including injection trials in a water model and test runs...

Efficient Recovery of Copper and Cobalt from the Matte–Slag …

The results showed that copper and cobalt contents in cleaned slag could decrease averagely to 0.18% and 0.071% respectively after cleaning. 91.99% Cu and 92.94% Co and less than 38.73% Fe were ...

THE BENEFITS OF LIME INJECTION IN THE ELECTRIC …

The optimum method for lime injection is dense phase. This allows fine particles of lime to be injected into the EAF through the injection lance, which is located close to the slag for deeper penetration into the slag and metal interface. Lime injection results in faster dissolution of lime because of the larger surface area afforded by smaller

Intelligent sensor for coal powder rate injection in a slag cleaning

An intelligent sensor for estimating the coal powder rate injected into a slag-cleaning furnace (SCF) was developed at Caletones Smelter, Chile. At present the estimation …

Coal rate injection control in a slag cleaning furnace

The initial study to control the coal rate injected into a slag-cleaning furnace (SCF), based on a soft sensor, was developed at Caletones Smelter, Chile. ... burner is continuously operated during the complete process to keep the bath temperature close to 1,250 qc. 2.2 Coal injection system. The coke is transported from the silos to the ...

Efficient Recovery of Copper and Cobalt from the Matte–Slag …

The optimum slag cleaning conditions were found to be: a coke dosage of 2 pct, a pyrite dosage of 2 pct, and a smelting temperature of 1260 °C lasting for 2 hours. In order to improve on the low utilization ratio of additives associated with the industrial sedimentation process, an innovative additive introducing method was put forward which ...

OneTunnel | Slag Reduction and Cleaning with Calcium Carbide

The cleaning of copper smelting slag requires magnetite and cuprous oxide reduction. The slag reduction with coke, injected coal powder or bunker oil is strongly endothermic and requires heat generation by fuel combustion or the use of electric energy. The reduction of fayalitic slag with calcium carbide is slightly exothermic and the formed calcium silicate …

Efficient Recovery of Copper and Cobalt from the Matte Slag …

effects of coke, pyrite addition, and smelting tempera-ture on the recovery of copper and cobalt from matte–slag mixture. Finally, an injection simulation experiment was performed to demonstrate the feasibility of the method that injects additives into the molten slag using a designed injection device. II. MATERIALS AND METHODS A ...

coke injection in to slag cleaning in Mexico

Recovery of Copper and Cobalt from Slag Cleaning … Slag from an electric slag cleaning furnace was injected with methane and air mixtures to facilitate the recovery of copper and cobalt. The …

Pulverized Coal Injection (PCI) into a Blast Furnace: …

Pulverized coal fuel (PC) is coal that has been pre-crushed into fine dust suitable for injection into a blast furnace. It is used as the most effective and cheapest substitute for a part of metallurgical coke and makes possible to …

Latest results of the slag cleaning reactor for copper recovery …

developed new concept of slag cleaning combines DC furnace technology with an extra magnetic field for vigorous slag stirring, enhancing mass transfer to the re-ductant surface, accelerating the rate of reduction, and destabilizing the emulsion of matte or metal inclusions in the slag. Intensive slag stirring increases the probability of

Coke oven gas injection into the blast furnace to reduce CO2 …

To save CO2 emissions many steel producers have announced or already started to inject hydrogen or hydrogen containing gases into the BF. Although natural gas and also coke oven gas injection have ...

Intelligent sensor for coal powder rate injection in a slag cleaning

Intelligent sensor for coal powder rate injection in slag cleaning furnace 779 During the vessel discharge, the operator tries to maintain the coke flowrate by manipulating the set point of the pressure controller on the nitrogen line. Sometimes the blow valve is used to reverse the coke compactness in the lower part of the cone.

Intensification of Processes in the Non Ferrous …

In parallel test runs in the pilot scale EAF of IME have been conducted in order to demonstrate the feasibility of a slag cleaning treatment by coke injection. It has been found that the...

Coal rate injection control in a slag cleaning furnace

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Evaluation of Biochar and Coke Blends for Slag …

Using an induction furnace to simulate EAF conditions, a synthetic slag is melted, and injection carbon is added into the slag layer. The slag foaming effectiveness of petcoke, BC, and three blend cases are studied.

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Recovery of Copper and Cobalt from Slag Cleaning Furnace …

reductants into the molten slag bath. During injection, the reduction kinetics are increased significantly by the intense mixing of the reductants with slag [11-12]. Such injection processes may be carried out using a topsubmerged lance in- an existing slag cleaning furnace or in a

Coal rate injection control in a slag cleaning furnace

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Efficient Recovery of Copper and Cobalt from the Matte–Slag …

By injecting 2 pct coke and 2 pct pyrite, the contents of Cu and Co in cleaned slag decreased to 0.46 and 0.01 pct, respectively. It proves that the injection of additives into …

(PDF) Reductive-sulfurizing smelting treatment of smelter slag for

The results showed that copper and cobalt contents in cleaned slag could decrease averagely to 0.18% and 0.071% respectively after cleaning. 91.99% Cu and 92.94% Co and less than 38.73% Fe were ...

Slag Cleaning Techniques for Maximizing Metal Recovery and

Slag cleaning is a metallurgical process that treats molten slag from primary smelting operations to recover valuable metals, including copper, cobalt, nickel, and others, that are often retained ...

Influence of slag composition on reduction control and …

Control of copper in SCF slag Metallurgical coke for reduction reactions in the SCF is charged from the roof of the furnace to the surface of the slag. The amount of coke to charge to a slag batch is calculated using a coke-addition model, which takes into account the percentage of copper in the slag, the degree of copper reduction required, and

Leveraging Value and Environmental Gains Through Integrated …

in the form of anthracite and coke, at close to 50 000 tpa was the only additional raw material ... beneficial feature in slag cleaning. Lance injection below a molten bath is ... The term "clean ...

Development of Electric Furnace Slag Cleaning at a Secondary …

The use of an electric arc furnace for recovery of metal values from slag generated in a secondary copper smelter has been successfully demonstrated and commercialized. Blast furnace slag containing about 1.5% Cu, 1.0% Pb, 3.5% Zn, 1.0% Ni, 40% FeO and 1.0 opt Ag was retreated to recover better than 75% of the metal values. The addition of limestone and coke was required …

Recovery of Copper and Cobalt from Slag Cleaning Furnace …

Slag from an electric slag cleaning furnace was injected with methane and air mixtures to facilitate the recovery of copper and cobalt. The effects of methane-to-air ratio, gas flow rate and …