iron recovery from slag processing

Enhancement of Iron Recovery from Steelmaking Slag

28-07-2016  Steelmaking slags are usually processed for iron recovery by dry magnetic separation [ 7, 8 ]. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to replace high-cost steel scrap and iron ores.

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Recovery of iron and removal of hazardous elements from ...

20-11-2016  We also determined how slag foaming affected the iron recovery by performing kinetic analysis (Heo et al., 2013). Iron recovery from molten copper slag via the carbothermic smelting reduction process was increased upon the addition of up to 20 wt% CaO; this improvement was caused by the increased fluidity of the slag.

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Iron Recovery from Discarded Copper Slag in a RHF Direct ...

03-11-2016  the slag cannot be effectively utilized. Main methods in use for iron recovery from copper slag include direct beneficiation for iron recovery [3], oxidative modification [4,5] of iron oxide for iron recovery, smelting reduction for iron recovery [6,7], and direct reduction (DR) for iron recovery

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Iron Recovery from Discarded Copper Slag in a RHF Direct ...

The iron products obtained from the pilot tests under such conditions have an iron grade of 90.35% with an iron recovery rate of 89.70%.

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IRON RECOVERY AND PRODUCTION OF HIGH ADDED

process) and the slag is driven directly to the final stage of the process, where the liquid slag is fiberised to produce inorganic fibers and mineral wool products. Thermodynamic modelling ... is needed to achieve high iron recovery in the metal phase. Calcium oxide presence

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A method for recovery of iron, titanium, and vanadium

03-02-2018  Under the optimal conditions, 93.67% iron from the raw ore was recovered in the form of iron nugget with 95.44% iron grade. After a water leaching process, 85.61% of the vanadium from the roasting slag was leached, confirming the sodium oxidation of most of the vanadium oxides to water-soluble sodium vanadate during the roasting process. The total recoveries of iron, vanadium, and

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An Overview of Recovery of Metals from Slags

The optimum conditions for recovering iron by oxidizing roasting and magnetic separation are as follows: calcium oxide content of 25 wt.%, mixed gas flow rates of CO2 and CO of 180 and 20 mL/min ...

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Slag recycling - recovery

No slag recovery data is available for 2019, but estimates from the US Geological Survey (USGS) assume that the quantity recovered will comprise approximately 50 % blast furnace slag and 50 % steelworks slag with a merchandise value of US$ 470 million. Blast furnace slag accounts for 88 % of the commercial value.

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Recycling Nickel Slag by Aluminum Dross: Iron-extraction ...

rate was inlet into slag system to oxidize the iron-bearing phase from fayalite to magnetite, followed by the magnetic separation and reduction process. Learning from the treatment techniques for cooper slag, aluminothermic reduction process is adopted for the iron recovery from nickel slag

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Economic and environmentally beneficial treatment of slags ...

Blast furnace slag contains little metal, and recovery of metal (even iron) from it is usually not important. About 220–370 kg of slag is produced per ton of iron. Blast furnace slag was used as early as 1880 as a phosphatic fertilizer. Today, blast furnace and steel slag have found a wide application in areas such as cement production, road

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Recovery of iron from waste slag of pyrite processing ...

Recovery of iron from waste slag of pyrite processing using reduction roasting magnetic separation method G F Zhang Kunming University of Science and TechnologyKunming 650093, China; Department of Materials Science and EngineeringUniversity of Toronto, Toronto M5S 3E4, Canada Correspondence [email protected]

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Iron Recovery from Discarded Copper Slag in a RHF Direct ...

03-11-2016  minerals Article Iron Recovery from Discarded Copper Slag in a RHF Direct Reduction and Subsequent Grinding/Magnetic Separation Process Zhicheng Cao 1,2, Tichang Sun 1,*, Xun Xue 1,2 and Zhanhua Liu 2 1 Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;

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Iron Recovery from Discarded Copper Slag in a RHF Direct ...

Studies on the direct reduction of carbon-bearing pellets made from discarded copper slag have been conducted in this paper. They include the influences of reduction coal content, limestone content, industrial sodium carbonate content, reduction temperature, reduction time and layers of carbon-bearing pellets on reduction effect. Finally, the optimum conditions have been obtained.

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US20150000467A1 - Method of separating and recovering

The present invention provides a method of separating and recovering iron from a waste non-ferrous slag, generated in a process for smelting of non-ferrous metals, including copper, zinc and lead, in which a reducing agent and a reaction catalyst are added to the crushed waste non-ferrous slag, and the mixture is subjected to a reduction reaction, thereby converting amorphous iron oxides ...

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3 Iron Unit Recycling - Energy

from steelmaking, iron and steel recovered from slag processing, and defective or rejected products at the mill, e.g. crop ends, side trimmings, and other process related yield losses. • Prompt Scrap is steel scrap generated during the manufacture of steel products. Examples of this type

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Recycling Nickel Slag by Aluminum Dross: Iron-extraction ...

rate was inlet into slag system to oxidize the iron-bearing phase from fayalite to magnetite, followed by the magnetic separation and reduction process. Learning from the treatment techniques for cooper slag, aluminothermic reduction process is adopted for the iron recovery from nickel slag

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Multistage utilization process for the gradient-recovery ...

15-08-2017  Recovery of iron: A coal-based direct reduction–magnetic separation process was developed for the recovery of iron in the form of high chromium-vanadium iron with 81.53% Fe, 1.31% Cr and 2.04% V, and the recovery of titanium in the form of Ti-bearing slag with 16.45% Ti.

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Recovery of metal values from copper slag and reuse of ...

Copper slag was characterized and processed. The pyro-metallurgical processing prospects to generate utilizable materials were arrived at through rigorous thermodynamic analysis. Carbothermal reduction at elevated temperature (near 1440°C) helped recover a majority of the metal values (e.g., Fe, Cu and Mo) into the iron-rich alloy product which can be a feed material for steel making.

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Improving Copper Recovery from Production Slags by ...

With the existing process route in the pyrometallurgy of copper the recovery of valuable metals from the slag phase is not sufficient. ... The slag type used in copper industry is normally a fayalitic based slag [2]. After processing the ... copper and iron, see Figure 2.

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Reducing Slag and Dross in Ductile Iron Castings

01-11-2016  Even if gray iron is not as dirty as ductile, slag is a considerable concern. For this reason, it is important to minimize slag in gray iron too, and DISPERSIT definitely helps to achieve this. For gray iron, it is recommended that DISPERSIT should be introduced at the inoculation step; The recommended addition rates (0.1 – 0.2% by weight) remain the same.

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