The results of the micro-flotation experiment showed that cuprite recovery is related to the particle size, and that an excessive content of fine particles (<18 μm) impacted the recovery of coarse particles. ... W. Q. Qing, D. X. Chen, and W. Liu, Copper recovery from Yulong complex copper oxide ore by flotation and magnetic separation, …

Adkins and Pearse (1992), in a study of the flotation of a mixed copper sulphide/oxide ore, showed that a mixture of isopropyl xanthate and dicresyl DTP resulted in enhanced rates and recoveries of copper. Synergistic effects in flotation were also reported by Finch and Smith (1972). They observed that mixtures of surfactants can …

Sulfidation is a widely used technology to improve the floatability of oxidized metal minerals or to stabilize the heavy metals in various wastes. The sulfidation mechanism of ZnO with pyrite was...

The copper oxide ore in Dali, which contains 0.69% of copper and 11.24g/t of silver, was beneficiated by sulphidizing - xanthate flotation method. The flotation tests were carried out systematically with sodium sulfide as sulphidizing agent and butyl xanthate + ammonium dibutyl dithiophosphate as the combined collectors. Through closed-circuit …

Assuming that oxides are only recovered during the oxide flotation stage, Cu-oxide minerals recovery can be estimated at around 52%. That constitutes an increase of more than 20% compared to the cumulative copper recovery of less than 30% obtained when using SIPX and sulphidisation to float copper oxide ore (Corin et al., 2017). The ...

So far, sulphidizing flotation has become the most widely-used industrial approach for the utilization of copper oxide ores. If xanthate collector is used solely in complex copper oxide ores, its collection capability is limited. However, excessive amount of sulfurizing agents have great adverse effects on the flotation of copper oxide [3].

Sulphidisation, an electrochemical process for conversion of a non-sulphide, oxide or oxidised sulphide, to a sulphide surface that facilitates efficient adsorption of thiol collectors to impart hydrophobicity, offers a way to improve the enrichment of oxide and oxidised sulphide ores by flotation.Although it has shown great potential, it has equally …

Sulphidising flotation of oxide copper–cobalt ores with sodium hydrosulphide used as sulphidising agent is common practice in Katanga, Democratic Republic of Congo.From laboratory investigations ...

At present, the treatment methods for copper oxide ore mainly include flotation, 5, 6 leaching 7, 8 and flotation and metallurgical processes. 9 The flotation …

This composition agrees well with the X-ray diffraction pattern, which indicated that the only identifiable mineral was goethite. The ore was. Sulphidation experiments. Fig. 2 shows the experimental nickel and iron sulphidation degrees as a function of sulphur addition, as determined by the iron and nickel extraction in the …

improves their enrichment by flotation. Sulphidation of chalcopyrite in ores – helps with the separation of copper and iron sulfides, and increases the selective extraction of copper from raw materials. Characteristic of raw materials Copper ore of Boschekul deposit Boschekul - The largest copper deposit in Kazakhstan contains copper, …

Figure 1 is a generalized diagram of a conventional copper flotation plant from the point where ore first enters the circuit to the production of concentrate and tailings. To prepare ore for the flotation process, run-of-mine ore, which may contain from about 2 to 5 percent water, by weight, when mined, is

The mixed (transitional) sulphide/oxide ores were stockpiled in the absence of an economic processing route due to their poor flotation response and high gangue acid …

The traditional method applied for the flotation of copper oxide or mixed ores is sulphidization, which was first developed with industrial success on Pb-Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na 2 …

For example, Li et al. 32 investigated the recovery of lead and zinc from low-grade lead-zinc oxide ore by sulfidation roasting and flotation process. The results showed 79.5% Pb and 88.2% Zn were ...

In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite, galena, cerussite, hemimorphite and iron oxide minerals with 5.04% CuO, 1.61% PbO, 2.07% ZnO and 56.40% SiO2. The experimental design methodology …

Copper oxide ore is characterized by low ore grade, fine embedded particle size and severe slime coating, which is a difficult ore to be processed in China [1].Malachite [Cu 2 (OH) 2 CO 3] is a classic type of copper oxide and can be widely applied in copper metal extraction [2].And it is a type of hydroxy copper carbonate, which is formed by …

represented a high quality (HQ) ore dominated by sulphide minerals and low quality (LQ) ore dominated by oxide minerals. The quality of an ore at Kansanshi is defined by the acid soluble copper (ASCu) content of the ore, which is …

This means that 95.7% of the copper present in the ore was recovered in the concentrate, while the rest was lost in the tailings. (c) The % Cu Loss can be calculated by subtracting the % Cu Recovery from : % Cu Loss = 100 – 95.7 = 4.3% This means that 4.3% of the copper present in the ore was lost in the tailings.

A new method, staged flotation for effectively increasing the recovery of ultra-fine copper oxide ore with a new type of collector (ZH-1, C3-5 carbon chain xanthate) is proposed for the first time. The flotation process and mechanism were examined by flotation tests, entrainment rate analysis, laser particle size experiments and …

Grind establishment tests were performed on all three bulk composite ores, sulphide, oxide and blended ore (70% sulphides and 30% oxide). For each ore composite, three 1000 g samples (<2 mm) were ground as a function of time in a sealed stainless steel laboratory rod mill containing stainless steel rods.The rod mill was built by ESSA …

This paper presents the sulfidisation promotion effect of ammonium sulfate on the sulfidisation flotation of both malachite and copper oxide ores. Copper oxide ores are commonly difficult-to-float due to its molecular structure, and adding sodium sulfide as activator is necessary; however, its dosage to the flotation pulp must be strictly …

The traditional method applied for the flotation of copper oxide or mixed ores is sulphidisation, which was first developed with industrial success on Pb–Zn oxide ores in Australia (Crozier, 1991). The method involves multistage addition of sodium sulphide (Na 2 S), sodium hydrogen sulphide (NaHS), or ammonium sulphide (NH 4) 2

oxide copper in a ore can be taken as a important criterion of floatability of the ore. To determine combined oxide copper in ores, a chemical analytical procedure termed …

Complex and non-sulfide lead–zinc ores are difficult to concentrate, but the growing demand for lead and zinc metals necessitated their beneficiation. Froth flotation is practically the most effective method in their beneficiation when optimum flotation conditions are attained. The aim of the current study is to use process mineralogy as a …

The preferred method for the flotation of oxide and mixed copper ores is sulphidisation. The reagents are typically sodium sulphide (Na 2 S) and sodium hydrosulphide (NaHS).

The oxidised sulphide ore was studied by artificially oxidising a copper sulphide ore to various states during 16 months. For each oxidation state, the effect of chemistry was …

Copper sulfide-oxide ore Ghozlo mine 1 Introduction Unlike lead–zinc and copper–zinc deposits that are abun-dant in the world, there are limited amounts of deposits that contain the compounds of all three elements Cu–Pb–Zn in the form of sulfide and oxide [1, 2]. The copper–lead bulk flotation method is an economical

A framework for selective sulfidation is proposed for the practical separation and enrichment of numerous metallic elements, to enable environmentally and economically sustainable metal processing.

The increasing complexity of ore deposits, declining ore grades and higher global demand for copper has resulted in increased ore processing by flotation plants around the world.