pyro metallurgical extraction of copper from sulfide ores

Chalcocite (Cu 2 S) is the main source for metallurgical production of copper worldwide but it usually co-exist with nickel sulfide in nature. To develop an efficient and green process for the separation and extraction of valuable metals from high-grade matte, we performed density functional theory (DFT) calculations and experimental …

Although the sulfide ores are the preferred source of this metal more than 40% of the world's supply of Nickel comes from laterites and serpenties. (McCutcheon 2003, Blainey 1994, Dakvi 2004) (Figures 1 and 2). The production of Ni from sulfide ores is obtained mostly by a pyro-metallurgical process (Crundwell et al. 2011). Laterite ores can be ...

The matte furnaces include three zones: (i) a heating zone (ii) a reduction zone and (iii) the smelting zone. Smelting of sulphide ores result in a 40–50% copper …

In the well-known technology of heap bioleaching of sulfide ores, the ore is seeded with bacteria, micro-organisms "work" on a lump, bioreagent synthesis and oxidation of minerals occurs in an ore mass, all of the ore material is aerated, solution composition and heap temperature are controlled [].For adequate metal extraction from …

Numerous pyro- and hydro-metallurgical processes were developed to extract copper from such sulfide minerals. However, due to dwindling grades of copper ore, hydrometallurgical methods are being increasingly used and gaining popularity. ... Extraction of copper through pyro metallurgy from sulfide ore is one of the chief …

Pyrometallurgical processes are a primary method to recover PGMs from spent catalyst.3 In general, they can be divided into three groups: smelting, chlorination, and sintering processes. Smelting Process. The smelting process is the mostly commonly employed approach for concentrating PGMs in many companies with advanced …

Copper is predominantly recovered from sulfide ores by pyrometallurgy – an energy intensive process requiring capture and treatment of released SO2. Whilst some copper …

Its application in metallurgical industry has involved a variety of metals, among which the extraction of copper, uranium, and gold, etc. from ore has been industrialized. The bioleaching process of nickel and cobalt is still in the experimental stage. ... Potential of critical high-technology metals in eastern alpine base metal sulfide ores ...

Though sulfide ores after concentration are generally treated by the pyro-metallurgical route, most processes for lateritic ores deal with either the acid leaching at ambient temperature and ...

Metal ores are generally oxides, sulfides, silicates (Table 23.2.1 23.2. 1) or "native" metals (such as native copper) that are not commonly concentrated in the Earth's crust, or "noble" metals (not usually forming compounds) such as gold (Figure 23.2.2 23.2. 2 ). The ores must be processed to extract the metals of interest from the waste rock ...

The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and …

Most of the copper in the world is produced by processing sulfide ores by flotation to obtain copper concentrates and their subsequent processing using …

Roasting is the oxidation of metal sulphides to give metal oxides and sulphur dioxide. Typical examples are: 2 ZnS E3 O 6. L2 ZnO E2 SO 6 eS 6. 5.5 O 6. Fe 6. O 7. 4 SO 6 2 PbS E3 O 6. L2 PbO E2 SO 6 7. ZnO.Fe 6. O 7. Typically,sulphide ores of copper, zinc and lead are roasted either partially or completely. Copper es for

The increasing demand for copper and the depletion of primary resources have urged researchers and industrialists to explore secondary resources, copper slag being one of them. Generally, copper is mined from ores containing 0.4–0.8% Cu [47]. Copper metal is produced from these ores following a pyrometallurgical route of …

The extraction of copper from ore has commonly been performed using mainly pyro- metallurgical, hydrometallurgical, and biochemical processes [1]-[3]. In traditional pyrometallurgical process, various gases released produced unacceptable air pollution, and metallurgy equipments always suffered serious erosion, leading to high …

The retort process produces zinc metal by reducing zinc oxide (ZnO) with carbon and by condensing the resulting zinc vapor. This is one of the first zinc production technologies used and was developed in response to the need for extracting zinc from oxidic zinc ores. Externally heated and batch-operated horizontal retorts were originally used.

The method used to extract copper from its ores depends on the nature of the ore. Sulfide ores such as chalcopyrite ( CuFeS2 C u F e S 2) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest ores of copper.

Most of the copper in the world is produced by processing sulfide ores by flotation to obtain copper concentrates and their subsequent processing using pyrometallurgical technologies [1] [2][3][4 ...

A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical. Smelting is increasingly expensive …

K. Binnemans. Published in Green Chemistry 27 January 2020. Chemistry, Environmental Science, Materials Science. Copper is extracted from sulfidic ores by a …

Pyrometallurgy refers to the processes of extracting or refining nonferrous metals from metallurgical materials at elevated temperatures to process high-grade ores (Anderson, 2016), demanding …

Low-temperature roasting, selective decomposition and water-leaching were used to extract nickel and copper from low-grade nickel sulfide ore with highly alkaline gangue. The effects of variable factors, such as the dosage of roasting additives, the ore particle size, roasting time and roasting temperature, selective decomposition …

Copper smelting dust is generated during the pyro-metallurgical process of copper extraction. This dust contains valuable metals such as Cu, Pb, Zn, and Bi, as well as undesirable toxic materials such as As and Cd.1 In recent years, the increase of copper production and depletion of high-grade copper ores have resulted in the generation of a …

facilities. The steps used to process the sulfide ores are mining, grinding and concentration of ore. As per Indian Minerals Year Book 2020, the production of copper ore was 3.95 million tonnes in 2019-2020 and production of copper concentrates was 124692 tonnes in 2019-2020. The production of copper concentrates was carried in

Antimony is classified as a critical/strategic metal. Its primary production is predominated by China via pyrometallurgical routes such as volatilization roasting—reduction smelting or direct reduction smelting. The performance of most of the pyro-processes is very sensitive to concentrate type and grade. Therefore, technology …

Hydrometallurgy. Hydrometallurgical process for nickel sulfide ore was developed in 1970s, which is to transfer valuable metals to liquid phase from solid ore by chemical leaching, and then extracts valuable metals by solvent extraction, chemical precipitation, crystallization, and other means [ 25 – 27 ].

Biomining is the extraction of target metals from ores or wastes such as the dissolution of chalcopyrite for copper recovery. A key outstanding topic of study is to improve the rate and total copper released from chalcopyrite that can become 'passivated' by surface layers, which hinders oxidative attack on the metal sulfide bond.

In summary, pyro-metallurgy, hydrometallurgy and bioleaching all have their limitations, and hence it is important to develop new green and sustainable metallurgy technologies to improve the e?ciency of copper extraction from copper sulfide ores. Solvometallurgy is an emerging technology for metal proces-sing, where little or no water is