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Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated by the interaction of silicate melts with oxidized P-F-SO4-bearing sedimentary rocks. This hypothesis is supported by geologic evidence, experimental studies, numerical modeling, stable and …
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1. Introduction. The main method to obtain copper matte, a combination of copper sulfide and iron sulfide, is to treat the concentrated copper ores with a pyrometallurgical process, where the waste copper slag produced during the process is usually discharged after the recovery process (Guo et al., 2019; Li et al., 2021).Such a …
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A recent paper showed that the fayalite in the copper slag could be reduced by walnut shell char. The iron concentration with …
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Molten Oxidation Followed by Gravity and Magnetic Separation. Molten oxidation is a smelting process based on oxidation reaction in a bath at temperature above 1450 °C under oxygen atmospheric environment [].The process of molten oxidation followed by gravity and magnetic separation was achieved for recovery of copper and iron from …
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The typical pyrometallurgical techniques are used to treat copper with processes involving calcining or smelting reduction followed by wet magnetic separation, which can recover metals such as Fe, Cu, and Co from copper slag in the form of iron-rich alloy [3, 4]. However, using these techniques to treat copper slag, fayalite cannot obtain a ...
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Based on the shortage of high-grade iron ore resources in recent years, different recovery methods have been studied to recover iron from copper slag. These methods include reduction method [5–9], oxidation method [10, 11], grinding flotation method, and magnetic separation method . Due to the limits of economic, application …
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In the indirect reduction of slag at temperatures above its melting point, metallic iron is mainly concentrated at the outer surface of the product, forming large …
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After cooling by the slag conveyor, the copper concentrate containing 29.44% copper and 30.39% iron and the iron concentrate containing 46.93% iron and 0.4% copper are obtained by the combined process of magnetic separation and flotation.
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Full size image. The copper content of copper slag is 0.5–4.5% or even higher, which is much higher than the 0.2–0.3% mining grade of copper mines in China. The total iron content in copper slag is about 40%, which is significantly higher than the mineable grade of iron ore in China (TFe > 27%) [ 10 ].
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With the increases in the costs of iron and copper ores, the incongruity between the significant imports of these ores into China and the ongoing accumulation of unused copper slag has greatly increased. Even so, there are few low-value methods for the utilization of copper slag. The present work demonstrates the processing of this …
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Iron Ore concentrate(GB/T 36704–2018) is implemented for IC detection after magnetic separation. A chemical method is implemented to test the composition of the copper matte collected. ... 2021, Dosmukhamedov et al., 2018), promoting the separation of copper from the slag in the form of Cu-Fe-S alloy. During the reduction …
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To comprehensively reuse copper ore tailings, the recovery of γ-Fe 2 O 3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic …
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Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica.
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Iron recovery from a lead slag in Henan province was carried out with the technique of coal-based direct reduction followed by magnetic separation. Scanning electron microscopy (SEM) was used to investigate the transformation of iron-containing minerals and the particle size of metallic iron generated by coal reduction. The results showed …
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Direct reduction refers to the process of reducing iron minerals in copper slag to metallic iron particles below the melting temperature of copper slag [].Using direct reduction–magnetic separation technology to recover iron resources in copper slag has fair recovery effect and short reaction time, which is the development trend of …
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9 Citations. Explore all metrics. Abstract. Approximately 2.0–3.0 t of copper slag (CS) containing 35%–45% iron is generated for every ton of copper produced …
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Extraction and separation of copper and iron from copper smelting slag: A review | Semantic Scholar. DOI: 10.1016/j.jclepro.2022.133095. Corpus ID: 250655743.
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However, iron is usually separated from copper matter and ends up in slags that produce secondary waste and wastes resources. Herein, molten salt is employed as a medium to separate chalcopyrite-derived copper-iron oxides. First, chalcopyrite was roasted to generate copper-iron oxide in the air. Then copper-iron oxide was thermo …
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An innovative technology for direct reduction-magnetic separation with the addition of Na 2 CO 3 and CaO was studied to upgrade copper slag assaying 40.33% Fe total and 0.65% Cu. It is difficult to recover iron and copper from the slag by direct reduction since the iron mainly occurs in fayalite and the copper exists in copper sulfide.
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In the production of copper from sulfide ore, slag accumulates at the processing plant. In the present work, the phase transformations that occur in such slag during its reduction by the gasification products of carbon at 1100 and 1200°C are investigated. Experiments show that most of the iron present in such slag may be …
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The XRD analysis of the copper smelting slag sample shows that the slag is amorphous (Fig. 1).The XRD analysis of the manganese ore indicates that pyrolusite (MnO 2) and Quartz (SiO 2) are the dominant crystalline phases in the ore (Fig. 2).The chemical composition of the slag from the XRF analysis is listed in Table 1.The iron in the slag is …
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2.1.1. Reduction. This method is employed to reduce the valence of Fe ions in the copper slag, that is, to reduce the Fe-bearing phase to metallic Fe, which is subsequently separated from the Cu slag via magnetic separation or melting. Improving the rate of the reduction reaction is crucial in this technique.
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Metal Losses to the Slag in Smelting and Converting. 80% of the copper produced from ores worldwide originates from sulfide ores. The copper concentrate which results from flotation of the ore is typically smelted and converted to blister copper [].During smelting S and Fe are oxidized, where SiO 2 is added to form a liquid ferric or ferrous …
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Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag are generated annually in Korea. The oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe2O3), silica (SiO2 from flux), alumina (AI2O3), calcia (CaO) and …
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The iron dissolution from copper slag is illustrated in the following equations: (16) CuS + 2 H 2 SO 4 + 2 H 2 O 2 → CuSO 4 + 2 H 2 SO 3 + 2 H 2 O (17) FeO + H 2 …
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The conditions of the BCL slag are in similar range as of previous research and in some of much higher concentration in terms of iron. BCL slag contains both copper and iron which are of interest and subsequently copper as mentioned can be recovered using flotation and iron be recovered using magnetic separation . talks about past work …
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The most common ore minerals that remained in the slag sample were sulfidic solid solutions of copper and iron such as Cu 5 FeS 4, Cu 2 S, and Cu 9 S 5 (Figure 5b). The metallic constituents of slags could be an important source of raw materials and they could be considered an environmentally beneficial source of copper and other …
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The most abundant element in copper slag is Fe/O/Si, among which the iron content is usually 35–45%, while the average grade of iron ore in China is only 30%. China is a big country of iron and steel, and its dependence on foreign iron ore is more than 80%. Therefore, it is very necessary and urgent to recover the iron resources in …
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@article{Zhu2020SynergeticUO, title={Synergetic utilization of copper slag and ferruginous manganese ore via co-reduction followed by magnetic separation process}, author={De‐qing Zhu and Jiwei Xu and Guo Zhengqi and Jian Pan and Li Siwei and Liao-ting Pan and Cong-cong Yang}, journal={Journal of Cleaner Production}, …
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Aiming at recovering iron from high-iron-content copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron recovery efficiency and optimized the technical conditions. When coke powder with 86wt% fixed carbon was used as a reductant, iron was successfully …
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