Solid State Extraction of Nickel from Nickel Sulfide Concentrates

Pyrometallurgical smelting and refining is the dominant method of extracting Ni from sulfide concentrates [14, 15].Prior to refining, the concentrate is smelted in an oxidizing atmosphere to yield a Ni-rich matte while simultaneously oxidizing the iron to iron oxide; the iron oxide is fluxed with silica to form an iron silicate slag that is immiscible with the matte [[16], [17], …

Sulfide Smelting

Download Citation | Sulfide Smelting | In recent years, roasting and smelting of sulfide concentrates are simultaneously carried out in a single furnace. The process known as flash... | Find, read ...

Microwave-enhanced selective leaching of arsenic from copper smelting

Alkaline sulphide leaching processes have been widely used for the arsenic selective removal from metallurgical wastes. However, high consumption of energy and chemicals as well as long extraction time have forced the industries to find more cost-effective and eco-friendly separation techniques. ... Microwave-enhanced selective leaching of ...

Selective separation of metals from wastewater using sulfide

Industrial processes like mining, metallurgy produce metallic wastewater, which is a potential source for recovering valuable metals. The distinctive properties of this wastewater include high levels of heavy metals and low pH and COD levels (Kumar et al., 2021; Liang et al., 2022).Sulfide minerals found in ores and tailings in mining operations are oxidized upon …

CN201289293Y

The utility model relates to a multi-functional microwave smelting device for iron sulfide mineral powder desulphurizing roasting and nitriding treatment, which belongs to mining and metallurgy equipment; three groups of spiral continuous material-conveying mixing rods are horizontally arranged in an overlapped manner according to the upper layer, the intermediate layer and the …

Recovery of Gold from the Refractory Gold …

Microwave technology has been confirmed to be suitable for use in a wide range of mineral leaching processes. Compared to conventional leaching, microwave-assisted leaching has significant advantages. It is a proven …

Analysis of Antimony Sulfide Oxidation Mechanism in …

The phase transformation mechanism of antimony sulfide in the oxygen-enriched smelting system was investigated. The standard Gibbs free energy change (ΔGθ) of reactions in the smelting system at 100 ~ 1400°C were calculated, indicating that the reaction between Sb2S3 and oxygen was liable to occur first, and that the high-valent antimony oxide decomposed at …

Microwave Heating Applications in Mineral Processing

Microwave heating of some oxides and sulfide compounds. Further, Wong (1975) 18and Tinga ... Antonucci and Correa, 199579, also commented that although this process demanded more energy than the conventional smelting process the production of elemental sulphur was advantageous.

Metallic antimony preparation by carbothermic reduction of …

However, the traditional pyrometallurgical process produces a large quantity of pollution in the smelting process of antimony sulfide ores with low sulfur content. ... By comparing the two roasting mechanisms, it was found that microwave roasting has a low smelting temperature and fast heating speed. In addition, the prepared Sb metal block has ...

Microwave-enhanced roasting of copper sulfide …

The microwave irradiation is used to the oxidative roasting of copper sulfide concentrate in the presence of CaCO 3 with the aim of eliminating sulfur dioxide emissions and accelerating roasting process. The calcine obtained is leached with NH 3 –(NH 4) 2 CO 3 solution for the recovery of copper. It is shown that the copper extractions from the calcine roasted with …

Low-Temperature Microwave Carbothermic Reduction …

Antimony is a crucial strategic metal resource that is widely used in alloys, materials, flame retardants, and catalysts. 1,2 Stibnite is the most important mineral raw material for antimony beneficiation and smelting. 3 The main component of stibnite is antimony sulfide. Antimony sulfide concentrate can be obtained from stibnite after ore beneficiation, and various …

Roasting of Sulfide Minerals

Where more than one metal sulfide is present in the concentrate, the reactions are truly complex and very large in number. The composition of a product in sulfide roasting depends not only on the chemical and mineralogical composition of the concentrate, temperature, and partial pressures of O 2, SO 2, and SO 3 but also on the other process parameters such as …

Everything You Need to Know About the Process of Smelting …

Another option for gold smelting is a 1,200-watt microwave. It is necessary that the magnetron in the microwave is located on the side or back rather than on the top. It is possible to purchase a microwave gold smelting kit or a kiln which you can then place on a kiln shelf in the microwave.

7th International Symposium on Advances in Sulfide …

Advances in Sulfide Smelting Part of the Extraction 2018 global extractive metallurgy conference This technical scope of this symposium examines all aspects of sulfide smelting technology, including basic principles, technology, and current operating practice. Papers that describe innovative methods for achieving impurity separation and

CN1031256A

A kind of microwave desulfurization plasma smelting directly obtains the method for high ice nickel.This method has been got rid of the operation of bessemerizing in the copper nickel oxidized ore tradition metallurgical technology, adopts microwave desulfurization plasma metallurgy directly to obtain high ice nickel and elementary sulfur.The height ice nickel grade …

Microwave-Enhanced Selective Leaching of Arsenic from Copper Smelting

Request PDF | Microwave-Enhanced Selective Leaching of Arsenic from Copper Smelting Flue Dusts | Alkaline sulphide leaching processes have been widely used for the arsenic selective removal from ...

Microwave-enhanced selective leaching of arsenic from …

In this work, a feasible microwave-enhanced leaching process was developed for arsenic selective removal from copper smelter dusts, and arsenic leaching efficiency could …

Ultrasound-Assisted Selective Leaching of Arsenic from Copper Smelting

Copper smelting flue dust (CFD) is a byproduct of pyrometallurgical copper production, containing valuable metals like lead, zinc, and copper, but also hazardous arsenic, which complicates its handling and recycling. Traditional methods for arsenic removal from CFD, such as pyrometallurgical and hydrometallurgical processes, are often inefficient or result in the …

CN101178286A

The invention relates to a multifunctional microwave smelting equipment which has sulfide ore powder desulfurizing-baking and nitriding functions and belongs to ore smelting equipments. A main machine consists of a structural machine frame, a micro generation and control device, an infrared temperature measuring device, an automatic control device, a continuous feeding …

Smelting method of zinc sulfide concentrate

The invention discloses a smelting method of zinc sulfide concentrate, which comprises the steps of mixing and granulating the zinc sulfide concentrate and manganese dioxide, placing the mixture in a horizontal vacuum furnace with microwave radiation, carrying out microwave radiation for a certain time under a vacuum condition, and obtaining crude metal zinc and manganese-rich …

Article Selective sulfidation of metal compounds

methods, such as matte smelting for copper–iron separation, can show ... Oxide–sulfide anion exchange chemistry exacerbates the thermodynamic differences between metal compounds, illustrated ...

Microwave-enhanced roasting of copper sulfide concentrate …

The microwave irradiation is used to the oxidative roasting of copper sulfide concentrate in the presence of CaCO3 with the aim of eliminating sulfur dioxide emissions and accelerating roasting ...

Recovery of gold from sulfide refractory gold ore: Oxidation …

The major chemical components of the sulfide refractory gold ore and pyrite are shown in Table 2. The sulfide refractory gold ore (SRGO) contains 30.34% Fe, 22.23% S, 11.19% As, 3.24% Al and 60.25 g/t Au. The total content of Fe, As and S is up to 63% of the sulfide refractory gold ore. The pyrite contains 43.36% Fe and 41.26% S.

Review on comprehensive utilization of nickel laterite ore

In recent years, techniques such as mechanical activation, ultrasonic assistance, and microwave radiation have also been gradually applied to improve the efficiency of leaching processes (Buyukakinci and ... Sulfide smelting processes should pay close attention to the environmental risks associated with sulfur utilization efficiency. The ...

Direct preparation of micro and nano antimony xide …

In this research, a clean, short, direct preparation of Sb2 O 3 crystals and nanomaterials via microwave oxidation roasting using antimony sulfide minerals is investigated.

Microwave Heating Applications in Mineral …

SEM photomicrographs showed that thermal stress cracks occurred readily along the sulfide-gangue mineral grain boundaries, and image analysis software showed a substantial increase in the liberation of sulfide minerals in …

Microwave energy for mineral treatment processes—a brief review

This review is a brief account of R&D results generated from microwave-assisted mineral treatments tests. The R&D results demonstrate that microwave energy has potential in mineral treatment and metal recovery operations such as heating, drying, carbothermic reduction of oxide minerals, leaching, roasting/smelting, pretreatment of refractory gold ore and …

Metallic antimony preparation by carbothermic reduction of …

In a comparison of conventional and microwave roasting, it was determined that microwave roasting exhibits a low smelting temperature and fast heating speed. The experimental results show that the block with 97.57 % Sb content was extracted from stibnite concentrates at a temperature of 750 °C, 70 % Na 2 CO 3 addition, 5 % anthracite, and 60 ...

Arsenic release pathway and the interaction principle among …

Arsenic is the 20th abundant metalloid element in the earth's crust, with a terrestrial abundance of 2–3 mg/kg (Sarkar and Paul, 2016), naturally occurs in over 300 different minerals major in the form of arsenates, sulfides, sulphosalts or oxides (Drahota and Filippi, 2009; Long et al., 2012), and seeps into the human production chain and living environment mainly through …

Comprehensive recovery of arsenic and antimony from …

Abstract:As the typical hazardous arsenic pollutants, copper smelting flue dust (CSFD) and arsenic sulfide residue (ASR) are produced extensively during copper smelting process, which pose significant pressure on environmental protection and green development of the copper industry. ... using alkaline sulphide solutions and microwave-assisted ...

Sulfide Smelting

Smelting happens to be one of the main steps in extraction of metals from sulfide and oxide minerals via the pyrometallurgical route. It is essentially an operation of melting and slag/metal ...