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Copper slag contains iron in the range of 42 to 45%, which can be recovered and recycled along with the contained copper to obtain an iron-copper alloy and a final slag rich in oxides.
Dec 31, 2018 This paper explores the effects of reductant, flux, reduction temperature and reduction time on the iron content and iron recovery rate of the deep reduction product from copper slag containing 41.47% of iron. Through a series of tests, it is concluded that reduction temperature and reduction time are leading influencing factors on the two indices of the product.
Aug 01, 2021 Researchers have attained a higher iron recovery of 57% with high-intensity magnetic separation than the low-intensity counterpart . The degree of cooling imparted to SS is also a deciding factor in the iron recovery. For SS slag that has been cooled slowly, the iron recovery percentages have been reported to be higher . A probable explanation for this could
ladle, or tundish). It is advantageous to separate this iron from the slag for the purpose of using the iron recovered as a substitute for scrap iron and/or making effective use of the slag for applications where iron would be an impurity. Therefore, after cooling, the steel slag is crushed and the iron is recovered by magnetic separation. In
Nov 26, 2018 Increasing the roasting temperature increases the degree of slag components recovery to soluble sulfates, as is expected the highest degree of iron, copper and zinc recovery to water-soluble form is found to be 81.8% at 150 min and 643 K (370 C).
In situations like these, a combination of techniques can recover metals from the slag, such as additional stirring, size reduction, magnetic separation, flotation, leaching or roasting 2, 4 5...
The present invention relates to a process for recovery of iron from copper slag. This invention particularly relates to a process for recovery of iron from a waste like granulated copper slag generated during the production of copper from its ores by a pyrometallurgical method. The present invention will be useful for solving the ecological and environmental
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
Dec 31, 2018 Abstract This paper explores the effects of reductant, flux, reduction temperature and reduction time on the iron content and iron recovery rate of the deep reduction product from copper slag containing 41.47% of iron. Through a series of tests, it is concluded that reduction temperature and reduction time are leading influencing factors on ...
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.
Dec 01, 2017 In this process, iron oxide in molten slag is reduced by solid aluminum to form elemental iron. (1) 3 (FeO) 2 Al (s) 3 Fe (l) Al 2 O 3 (s) They observed that iron recovery was maximum at Al/FeO molar ratio of 0.53 at which nearly 60% iron could be recovered.
Feb 03, 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.
Slag/Dross Recovery. Slag/dross and leaching residue are produced from the process of metal extraction. The commonly-seen slag/dross/residue includes copper dross, lead dross, tin slag, zinc leaching residue, antimony/arsenic dross, cadmium residue/cake, sulfur residue/cake, vanadium slag, nickel slag, iron tailing and iron bearing red-mud waste.
An earlier work noted that magnetic separation is a feasible way to recover iron from the tailings of waste copper slag otation. Unfortunately, the iron grade of magnetic products and the recovery of iron by the magnetic separation process is relatively low, only 52.21% and 38.09%, respectively, due to the
Jul 01, 2019 The iron recovery from lead slag is difficult through the use of conventional mineral processing methods, whereas iron recovery is feasible via the direct reduction process (Guo et al., 2018). Iron is mainly in the form of fayalite (Fe 2 SiO 4 ) and magnetite (Fe 3 O 4 ) therefore, it can be extracted as iron concentration via direct reduction ...
% of iron recovery, leaving the slag residue open to rare earths processing downstream. Following the previous works towards bauxite residue, Kauen and Friedrich looked into 10 the recovery of aluminium via three different methods a) Bayer-type process, b) Bayer-type process with slag leaching, and c) soda sinter process.
Smelting of ilmenite to produce titania slag allows for the recovery of iron as high purity pig iron. However, in the production of synthetic rutile from ilmenite sands, iron is returned to the ...
Apr 01, 2019 Towards red mud valorisation EAF smelting process for iron recovery and slag design for use as precursor in the construction industry. 15.00-16.20. Session 2 Alternative cements and aggregates. 15.00 Jo Van Caneghem KU Leuven. Leaching of heavy metals from concrete pavers containing waste-to-energy bottom ash as an aggregate
This work presents a semi-smelting reduction and magnetic separation process for the recovery of iron and alumina slag from iron rich bauxite ore. The effect of the process parameters on the recovery rate of iron, maximum particle size of the iron nugget, and the Al2O3 content of the alumina slag was investigated and optimized. The results show that the
Abstract Copper slag is produced in large amounts in seven copper smelter plants in Chile, and it is estimated that around four million tons of slag are disposed every year, and another 4045 million tons are historically cumulated. Copper slag contains iron in the range of 4245%, which can be recovered and recycled along with the contained copper to obtain an ironcopper alloy
The present invention relates to a process for recovery of iron from copper slag. This invention particularly relates to a process for recovery of iron from a waste like granulated copper slag generated during the production of copper from its ores by a pyrometallurgical method. The present invention will be useful for solving the ecological and environmental issues with an
Custom-designed for each application, our slag processing plants keeps the maximum environmental impact in mind. At our Metal Recovery Plant, a crushing and magnetic separation process is used to recover the metal contained in iron and steelmaking slag. This can then be effectively reused in the steelmaking process.
Nov 14, 2013 At the second stage iron from the residue after leaching recovered to water-soluble form additionally. The total iron recovery is 88.3%, considering the first stage. At the same time the recovery process of nonferrous metals and iron into solution is more selective than when slag processing at one stage. 3.2. Kinetics study
Nov 02, 2012 A novel process for recovering iron, titanium, and vanadium from titanomagnetite concentrates has been developed. In the present paper, the treatment of rich titanium-vanadium slag by NaOH molten salt roasting and water leaching processes is investigated. In the NaOH molten salt roasting process, the metallic iron is oxidized into ferriferous ...
7 that conducted semi-industrial scale tests on the recovery of pig iron and viscous slag using an Electric Arc Furnace operating at 1540 C. The slag was subsequently transformed into mineral wool. Borra et al 8 recovered pig iron at 1500-1600 C, with the aim to enrich leftover slag for acid leaching of rare earths downstream.
A smelting process for iron recovery and slag conditioning was investigated. Two slags were produced in an EAF under different fluxing conditions using lime and silica as fluxing agents. Iron was mainly recovered to the metal. Low S and acceptable
Oct 05, 2015 Zhihong Yang, Zhenghai Ma, The Effect of Basicity and Calcium Fluoride on GlassCeramic Production and Iron Recovery from Copper Slag, steel research international, 10.1002/srin.201600145, 88, 3, (2016).
May 09, 2014 Searchlight Minerals Corp. today announced significant technical achievements in gold and iron recovery at its Clarkdale Slag Project. ... four major steps of the production process crushing and ...
The most striking feature of this separation process is the variation of cobalt recovery according to the iron content in the alloy. This behaviour is shown in Figure 4. It can be seen that the recovery of cobalt (in percentage terms) is highest (albeit not by very much) in the case of the slag with the highest initial cobalt content.
Sep 27, 2021 Application of electromotive force between molten ironcarbon and slag is shown to decarburize iron. ... Recovery of the solidified iron WE and ...
Recovery of copper from copper slag and copper slag flotation tailings 77by oxidative leaching Leaching with ferric sulphate The slag and the slag flotation tailings were leached with ferric sulphate in 1 M sulphuric acid. The ferric iron concentration was varied in the range from 5
byproduct of molten iron processing and originates from the gangue in the mineral raw materials such as iron ore, coal, and limestone as well as those in the flux used at steel refining processes to remove Si, P, S, and other impurities. The iron and steel slag that is generated can be broadly categorized into blast furnace and steel making slag.
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.
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. However, aluminum dross is
Jan 01, 2006 Recovery of metal from steel slag and slag processing ( Shen and Forsberg, 2003 ). The magnetic separation method is used for separating metallic iron and iron minerals from steel slag. Commonly used magnetic machines are the cross-belt magnetic separator, drum magnetic separator and magnetic pulley separator.