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.

Introduction. Matte smelting is the main method for copper production, and about 2 tons of slag bearing 30% ~ 40% iron, 0.5% ~ 2% copper and 25%~30% silicon dioxide generates per ton of copper. For the issues of resource conservation and environmental protection, it is of great significance to utilize copper slag efficiently.

is a copper ore-processing plant established in 1960 in Botswana, situated in a town called ... Song, S.-X. Separation of silicon and iron in copper slag by carbothermic reduction-alkaline ...

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.

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 …

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 …

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 ].

DOI: 10.1016/j.jclepro.2022.133095 Corpus ID: 250655743; Extraction and separation of copper and iron from copper smelting slag: A review @article{Zhou2022ExtractionAS, title={Extraction and separation of copper and iron from copper smelting slag: A review}, author={Wen-tao Zhou and Xiao Liu and Xian-jun Lyu and Wen Xia Gao and Huili Su …

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 …

The results show that under the proper conditions, the copper grade of rougher copper concentrate was increased from 6.43% to 11.04%, iron recovery of magnetic separation was increased ...

The studies of recovery valuable constituents on the copper smelting slags were made, but the separation effect is not sufficient, because most of the studied objects were raw slag [3, 4], in which the iron constituents mainly exist in the form of fatality (Fe 2 SiO 4 ) and magnetic iron oxide, and fine mineral dissemination and grain size is ...

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 …

It was found that, with 5% CaO and 13–16% carbon additions, most of the copper and iron can be recovered from copper smelting slag at 1350–1400 °C. The copper and iron contents of the reduced ...

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 …

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 …

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 …

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 …

The effect of iron phase evolution on the copper content in slag during the slag cleaning process in an electric furnace was …

A recent paper showed that the fayalite in the copper slag could be reduced by walnut shell char. The iron concentration with …

Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by magnetic separation technique. Mining, Metallurgy & Exploration ...

The results show that by only adopting traditional magnetization roasting–magnetic separation, an iron ore concentrate containing 57.49% Fe and 1.4% P2O5 at an iron recovery rate of 87.5% and a ...

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 …

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 …

The schematic shows that nonferrous metal separation and recycling can reduce heavy metal pollution, facilitate the reduction of iron oxide in copper slag for …

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 …

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 …

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 …

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 …

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.