Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to …Web

Water is used as a liquid medium as well as a means of transportation during mining operations. Flotation, in particular, is a water intensive process where water makes up about 80–85% of the ...Web

Should it be possible to obtain a good recovery by flotation in a concentrate carrying most of the pyrite or other sulphide minerals, it may prove more economical to adopt this method, regrinding only the comparatively small bulk of concentrate previous to the cyaniding operation. Flotation may also prove to be the more economical process …Web

Highly efficient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity, thereby increasing the flotation separation …Web

Abstract. In the present work an intense bibliographic search is developed, with updated information on the microscopic fundamentals that govern the behavior of flotation operations of ...Web

In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a depressant to separate chalcopyrite from pyrite by flotation. The …Web

Flotation of Pyrite. Table of Contents. This paper is a record of the first of a series of tests on sulfide minerals to be made by the metallurgical department of the University of California. The purpose of the tests here recorded is to determine the action of standard oils, oil mixtures, and addition agents on the flotation of pyrites.Web

Froth flotation is the most common way to prevent pyrite from interacting with xanthate [19], [20]. pH variation directly affects pyrite-xanthate adsorption and the …Web

The interaction between grinding media and collector in pyrite flotation at neutral and slightly acidic pH. Miner. Eng., 145 (2020 ... A review of the effects of grinding media and chemical conditions on the flotation of pyrite in refractory gold operations. Miner. Eng., 94 (2016), pp. 21-28. View PDF View article View in Scopus Google Scholar.Web

As discussed in chapter 3, the froth flotation process is an acceptable operation for mineral processing. However, most chemical reagents used in this process are toxic to human health such, as sodium cyanides, sulphites, and potassium dichromates (Lin et al. 2017; Khoso et al. 2019b). In this regard, the implementation of microbial …Web

As is seen from Table 3, tennantite floated with butyl xanthate has the lowest Beloglazov flotation rate constant.The use of soda increases the flotoactivity of tennantite, which is consistent with research data [].It is known that soda medium promotes the active flotation of pyrite; during flotation of copper-bearing sulphide …Web

The unit operations of coper sulfide froth flotation plant were the following: A. ... the amount of copper oxide increased in the rougher feed can be due to the a ctivation of pyrite flotation by ...Web

By separating the pyrite from the tailings by flotation during the final years of operation of a plant, two fundamental aspects could be achieved: (1) a neutral tailings can be produced and used as a cover material for the dam containment wall, and (2) encapsulation of the pyrite concentrate with 2–3 m of fine material with little capacity to ...Web

The Copper pyrite concentration process Summarized. The success of an operation of this type is dependent upon the production of a high grade concentrate. This is accomplished by the use of "Sub-A" Flotation Machines which provide the maximum flexibility in flotation operations, thus insuring the maximum grade of concentrates will …Web

Pyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the concentrate and consequently reduce the quality of concentrate. Highly efficient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity, thereby …Web

Proposed effect of copper activation on pyrite flotation. 3.1. Interactions between lime and depressants. Lime in flotation, as a pH modifier, ... The total lime dose requirement in flotation operations (typically in the range of 0.4–2.5 kg per metric ton of ore feed), some treating up to 80 million metric tons of ore feed, can be significantWeb

Since the main economic value is derived from gold for the Telfer operation, the operational focus is on maximising gold recovery. To achieve this goal, the general philosophy for circuit design and operating strategy is: 1. Targeting a primary grind size optimum for copper recovery. 2. Operating the main flotation circuit in a sequential …Web

In general, Cu-Zn sulfide ores consisting of a Cu/Zn ratio of 0.4–1:1 (w / w) [16,17,18,19,20] are processed by a two-step flotation: (i) the selective flotation of Cu minerals while depressing sphalerite using zinc sulfate (ZnSO 4)—a sphalerite depressant—and other gangue minerals such as pyrite (FeS 2) and silicate minerals under ...Web

Figure 2b represents chalcopyrite flotation against pyrite. As the pyrite feed grade increased from 5% to 25%, chalcopyrite flotation against pyrite was improved when 30 wt% Cr steel was used as the grinding media, but this improvement was not enough to maintain a high Cu concentrate grade due to a reduced Cu recovery and more pyrite …Web

The aforementioned findings show that the negative impact of serpentine on pyrite flotation is caused by fine-grained serpentine sticking to and covering the surface of pyrite (Yang et al ... with the inhibitor introduced before the "Cleaner flotation" operation. Calcium lignosulfonate (CA) is a common inhibitor in the separation of ...Web

The reason is that pyrite is the most common gold-bearing mineral and hence it is recovered by flotation in numerous gold mining operations (Albijanic et al., 2015a; Rabieh et al., 2016; Rabieh et ...Web

During the crushing and grinding operations prior to flotation, new fresh surfaces are created which are naturally hydrophobic. These newly exposed fresh surfaces should overcome the detrimental effect of pre-oxidation to some extent. However, the flotation recovery of stockpiled pyrite ores is still unsatisfactory in practice, e.g., the …Web

This study investigated the effect of pyrite proportion on chalcopyrite and pyrite flotation via a tri-mineral system (chalcopyrite-pyrite-quartz) with a fixed Cu head grade while varying the pyrite proportion. ... This knowledge is critical for devising control strategies to optimise grinding and flotation operations in mineral processing ...Web

Main interest in the processing of complex sulfide ores has focused on the rejection of pyrite and selectivity problem that arises …Web

Pyrite Flotation.—Copper sulphate in neutral or slightly acid circuit forces the formation of a copper, or possibly a double copper-iron, xanthate with the iron mineral that had been coated or deadened in the first operation. Result: flotation of pyrite. Resume: (a) Iron xanthate; made possible, through a probable combination with copper ...Web

These two processes jointly affect the recovery of pyrite. Therefore, in the grinding operation before flotation, and on the premise of ensuring the dissociation of the minerals, over-grinding should be avoided as far as possible or the classified flotation process should be adopted to reduce the adverse effect of fine minerals on flotation.Web

Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance. …Web

The flotation-purified pyrite concentrates were formulated into catholytes; their electrochemical performance was evaluated in both single cells and 5-cell batteries for comparison to data generated under the same discharge conditions for catholytes formulated with HF/HCI purified pyrite. 46 CFR 179.240 - flotation material.Web

Effect of pyrite textures and composition on flotation performance: A review. Pyrite can have variable textures and chemical composition. Presence of complex …Web

The selectivity of AA on the flotation of chalcopyrite and pyrite was evaluated by flotation tests along with kinetics and entrainment calculations. The selective separation mechanism of AA for chalcopyrite and pyrite minerals was investigated by contact angle measurements, solution chemistry calculations, zeta potential …Web

Flotation separation of chalcopyrite from pyrite using lime or cyanides as depressants results in serious problems, such as the blockage of pipelines and environmental pollution. Eco-friendly organics are a future trend for beneficiation plants. In this research, the eco-friendly organic depressant sodium humate (SH) was chosen as a …Web

Recently, improved flotation of carbonaceous auriferous pyrite ores from the Carlin deposits has been maintained by the use of a CO 2 /N 2 gas mixture for conditioning and flotation [37]. Fundamental issues associated with CO 2 /N 2 flotation of pyrite are reported in a separate paper by Vaziri Hassas et al., 2018 [38].Web

In the flotation separation of chalcopyrite and pyrite, the commonly used high-lime process often causes problems such as losses of precious metals, blockage in pipelines and environmental pollution.Web

The scraped froth was manually collected for 3 min, the flotation recovery of pyrite samples was calculated based on the mass of froth and tailings. All experiments were performed in one roughing operation. The flotation test was repeated three times under the same conditions and the mean value was taken as the final result.Web

Then, the flotation results of mixture covellite-pyrite show that selective flotation is feasible with IPETC at alkaline pH with a low dosage displaying recoveries of 97 % covellite and 53 % ...Web

To avoid the influence of surface oxidation on flotation recovery, the pyrite particles (-74 ∼ +38 μm) were ultrasonically cleaned three times before the conditioning and flotation operations. The serpentine samples (-38 μm) were directly used without any pre-treatment before flotation.Web