Sulphide ores are a major source of Cu, Ni and precious metals. A basic principle of the extraction processes is to blow air into the molten sulphide in order to oxidise (1) S, which forms a gas and (2) Fe, which forms predominantly FeO and then partitions to a slag phase which covers the matte. A key element in the recovery of the metals is ...

Metals recovery from polymetallic sulfide tailings by bioleaching functional bacteria isolated with the improved 9K agar: Comparison between one-step and two-step processes. ... and provides the Fe 3+ or protons that cause the dissolution of sulfide ores (Diao et al., 2014, Figueroa-Estrada et al., 2020).

However, the fast depletion of sulfide PGM-bearing minerals has triggered interest in exploring the recovery of the PGMs from near-surface oxidized PGM ores which have proven to be more difficult ...

To recover copper and molybdenum from their porphyry sulfide ores, several process flowsheets are applied, and two of them are shown in Fig. 1.[23, 24] As illustrated in Fig. 1 (a), [23, 25] the two-stage flotation flowsheet is the most widely adopted.In the first stage, copper and molybdenum sulfide concentrates are recovered together.

Basically, refractory gold ores (gold recovery efficiency of <50% in average using direct cyanidation) are classified into sulfide, tellurium and carbon ores. Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful …

Sulfide ores are crushed and ground in order to liberate nickel minerals by selective flotation, in place of, or in conjunction with magnetic separators. After that, nickel concentrate (containing 6–20% Ni) can be collected. ... nickel–cobalt sulfide ore, and the subsequent recovery by ion exchange (IX) using alkaline glycine solutions in ...

Recovering gold from sulfide refractory gold ore has been an important guarantee for the sustainable development of gold industry, while there are many …

The new process is reliable, economical, environmentally friendly and promising for recovery industry of the complex mixed sulfide-oxide lead-zinc ores. This study will provide some reference and guidance for researchers working on flotation indexes optimization, and for flotation plants facing the similar problems.

Effects of residues produced by agricultural wastes fermentation (AWF) on low grade copper sulfide ores bioleaching, copper recovery, and microbial community were investigated. The results indicated that adding appropriate bulk of AWF made contributions to low grade copper sulfide ores bioleaching, which may be mainly …

Gold is highly encapsulated in the sulfide matrix in refractory gold ores. Pretreatment is an important process to recover gold from …

Pretreatment is an important process to recover gold from sulfide minerals. Gold-bearing ores ordinarily contain complex or refractory ores of sulfide minerals that interfere with gold recovery efficiency. It is …

Suitable catalytic agents that can control oxido-reduction reaction during bioleaching enhance the metal dissolution and are capable of scaling up which will considerably contribute to enhancing metal recovery from low-grade sulfide ores. 9.10 Controlled Slurry Potential. Metal recovery rate can be enhanced through controlled …

Our FLOTANOL™ frothers are customized to help you achieve the right froth to maximize recovery of coarse or fine materials, and our FLOTICOR™ additives can handle difficult ores with high viscosity pulps or undesirable contaminants. FLOTICOR™ DP sulfide depressants are efficient NaSH replacements to depress copper in the flotation of ...

The Congolese Copperbelt contains values sulfide ores that are abandoned or simply unexploited. ... and leaching time on copper and cobalt recovery from a sulfide ore. A representative sample was ...

The bioleaching rates reach their highest point in sulfide copper and chalcopyrite with a pulp density of 5% and 10%, respectively. Column flotation experiments of low-grade copper sulfide ores show that the …

Pyrite and arsenopyrite are generally the gold-carrying sulfide minerals in refractory gold ores (Ahtiainen et al., 2021, Corrans and Angove, 1991). Refractory gold ore is classified based on its recovery into mildly (80–95 %), moderately (50–80 %), and highly (less than 50 %) refractory ( Asamoah et al., 2021, Mabwe, 2020 ).

The most commonly used commercial process for metal recovery from oxidized ores is sulfidization flotation, since oxidized minerals after sulfide-treatment have characteristics similar to metal ...

This special treatment is required for two reasons: first, to liberate gold particles encapsulated in sulfide or arsenic minerals; and, second, to eliminate …

Low-grade ores generated by mining activities can lead to resource waste and environment pollution, which is of great concern. Thus, low-grade copper sulfide ores bioleaching is investigated in this study by re-inoculating bacteria at different intervals. The highest bacteria concentration of 5.830 × 107 cells·mL−1, improved attached bacteria …

Basically, refractory gold ores (gold recovery efficiency of <50% in average using direct cyanidation) are classified into sulfide, tellurium and carbon ores. Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide gold ores (Ubaldini and Vegliò, 2000, Saba, 2011 ...

A Flowsheet to recovery gold from sulfide ores. There are many arrangements and combinations using flotation in conjunction with treatment of gold ores. The two gold process flowsheets shown, with some variations, are probably the most commonly used. In Gold Flowsheet No. 1 the ore is ground in water to such a size as to …

Results show that bio-oxidation pretreatment can greatly improve the gold recovery rate of high-sulfur refractory gold concentrate, and at the optimum pH 1.3 in this study, compared with the ...

Introduction. In-situ recovery (ISR) offers the possibility of treating ore bodies with an approach radically different to conventional mining. In ISR metal values can be recovered from the rock by direct dissolution with leaching solutions which are supplied to the ore body and then pumped out for further processing of the dissolved metals (Sinclair …

In the previous attempt by Puvvada and Murthy (2000), the maximum amount of gold recovery was reported to be 43% from sulfide ore through the chlorate medium. A later study by Hasab et al. investigated the low recovery of gold from sulfide ores. It was found that it can be related to the passivation of the gold particles due to the formation of ...

Recovery of gold from ores using bacteria and fungi is becoming increasingly popular due to their easy handling, their quick adaption to metals, and the high …

Sulfide Ores. Increase recovery and process safety with customized solutions. Sulfide ore flotation solutions from BASF contain novel chemistries which promote a higher recovery while also increasing sustainability and safety. At BASF, we are committed to working with you to develop customized solutions that work for your unique needs.

Nickel sulfide ores are subjected to mineral beneficiation to reject sulfidic and non-sulfidic gangue and produce a nickel concentrate grading from 5% to 25% Ni ... Simplified process flowsheet of the Sherritt-Gordon ammonia pressure leach process for leaching of Ni sulfide concentrates and recovery of Ni via pressure hydrogen reduction ...

Abstract. Green non-toxic extracting gold from refractory sulfide gold ore using thiosulfate is an essential guarantee for the sustainable development of the gold …

Bio-oxidation of Gold from Refractory Sulfide Ores: A Journey Ahead. ... Through including high-throughput bacterial growth data and better process knowledge of the extraction and recovery approaches, bio-oxidation becomes more economically feasible and efficient. More advancements are necessary to evaluate the wide range of …

There are two main types of copper ore that are of interest: copper oxide ores and copper sulfide ores. Both ore types can be economically mined, but they are processed in different ways. Copper ...