Flotation of Gold and Gold-Bearing Ores

Dunne, R.

doi:10.1016/b978-0-444-63658-4.00020-7

Cited by 14 publications

(7 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Rendahnya kemiringan garis pada kurva lain disebabkan karena kolektor yang bekerja pada awal flotasi hanyalah Aerofloat 7249 sebagai kolektor primer. Kolektor ini mempunyai selektivitas yang baik dan hanya akan bereaksi dengan mineral chalcopyrite dan emas, sedangkan SIBX akan bereaksi dengan semua mineral sulfida [21].…”

Section: Indeks Selektivitas Flotasi Tembagaunclassified

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga

2023

j.n.a.material.manufaktur.dan.n.a

View full text Add to dashboard Cite

Evaluation of the use of the SIBX addition point and energy consumption in a flotation machine is an optimization effort to increase recovery in a valuable mineral separation process. The purpose of this study was to maximize the use of reagents and energy consumption in flotation machines by looking for the effect of the SIBX addition point and impeller speed variations on copper recovery. In the experiments, the authors vary the impeller speed and the SIBX addition points. The impeller speed is varied into five different speeds. While the SIBX addition point into four different points. From the variation of the experiment, the test must be done within 20 flotation kinetics. Those tests were performed for 8 minutes and will generate 4 concentrates and tailings. From this information, a graph of the relationship between recovery and time is obtained, and it can be seen that the point of adding SIBX and impeller speed is to produce optimal recovery values. From the available tailings and feed, an analysis of particle size and distribution is also carried out to check the effectiveness of changing the impeller speed pattern to provide kinetic energy for particles of various sizes to collide with air bubbles and increase the probability of collection of valuable minerals, so that high recovery is obtained in various areas. particle size. Of all the speed variations used in the impeller, the best kinetic recovery comes from the addition of SBX in the 0 min, 2 min, and 4 min. While the worst comes from the addition in the 6 min. Copper kinetic recovery is only affected by the nature and amount of hydrophobic particles but is not affected by impeller speed. Copper recovery at each end of the experiment showed the same value which is an average of about 94%.

show abstract

Section: Indeks Selektivitas Flotasi Tembagaunclassified

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga

2023

j.n.a.material.manufaktur.dan.n.a

View full text Add to dashboard Cite

show abstract

“…Flotation is a well-known method for upgrading sulfide ores with low gold content [41][42][43][44][45][46]. As the gold grade of the ore was very low, it was planned to upgrade the gold content with bulk sulfide flotation.…”

Section: Flotation Testsmentioning

confidence: 99%

Automated Mineralogy and Diagnostic Leaching Studies on Bulk Sulfide Flotation Concentrate of a Refractory Gold Ore

Guner,

Bulut,

Hassanzadeh

et al. 2023

Minerals

View full text Add to dashboard Cite

Obtaining detailed and precise information from a classified refractory gold ore has been a long-standing challenge in mineral processing and process mineralogy. Although the concept of diagnostic leaching has been extensively addressed in the literature, very little information is available linking this approach with current advanced characterization techniques such as automated mineralogy. The present research study aims to characterize the flotation concentrate of refractory gold ore by combining diagnostic leaching and automated mineralogy to examine its processability. The diagnostic leaching process was applied stepwise at five stages, and the automated mineralogy was performed on different size fractions of the flotation concentrate. The chemical (X-ray fluorescence (XRF), atomic absorption spectroscopy (AAS), and inductively coupled plasma-optical emission spectroscopy (ICP-OES)) and mineralogical (X-ray diffraction (XRD)) analyses of the feed sample confirmed that the ore is a low-grade gold ore with 0.7 g/t Au. Initially, bottle roll tests were carried out to investigate leaching behavior, and the ore’s refractory nature, and gold recoveries of bottle roll tests in different sizes were below 40 wt%; it is classified as a high refractory gold ore as a result of direct cyanide leaching. Bulk sulfide flotation was applied to increase the gold content of the material. Automated mineralogy results demonstrated that most of the gold in the concentrate is present as an invisible gold form, and 63.7 wt% of gold was distributed in pyrite. Diagnostic leaching results showed 39.7 wt% of total gold was leachable using direct cyanide leaching, and around 33 wt% of undissolved gold was located in pyrite and arsenopyrite.

show abstract

“…This would be uneconomical to mine due to the gold content, yet the gold provides significant opportunity value. The use of flotation methods in the gold mining industry began in the early 1930s after the introduction of water-soluble flotation collectors (xanthate and dithiophosphate) that enabled the flotation of sulfide minerals (Dunne, 2016). Gold is recovered to varying degrees along with copper during the flotation process and ultimately recovered from copper smelting residue (Sceresini & Breuer, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Sulfide minerals that have undergone oxidation require different treatment than before because the surface of the mineral has changed to hydrophilic and soluble (Cai et al, 2021;Chen, 2021;Li, Zhou, & Lin, 2020;Shen et al, 2020). Therefore, it is common to add sulfiding agents (sodium sulfide and sodium hydrosulfide) to the pulp to sulfide the minerals before flotation (Dunne, 2016). Compared to the mechanochemical, hydrothermal, and roasting methods, the method of adding a sulfiding agent directly to the pulp (surface sulfidation) is considered to be cheaper, easier to operate, and less likely to corrode equipment (Liu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Implementation of Sodium Hydrosulfate (NaHS) Flotation with F83 and F515 on Mass Recovery of Gold Ore

Adi Putri

2023

j. of. metallurgical. eng. and. process. technol.

View full text Add to dashboard Cite

There exist more and more gold mines in Indonesia, especially those that have just been started. It is indispensable to do test work to decide the process flow that will be utilized. Reagent usage tests on the flotation of gold ore were carried out to determine the mass recovery obtained by using a specific reagent and to determine which reagent is more optimal and profitable for further test work. Flotation is carried out using mechanical flotation with F83 and F515 as collector and frother respectively along with the addition of NaHS as modifier or sulfidization reagent.. Based on the flotation that has been conducted, it is known that the use of NaHS enhances the mass recovery obtained. Moreover, compared to the usage of other reagents, flotation with NaHS gives a slightly larger mass recovery with an increase around 2-3%. This indicates that the gold ore used is ores that have been oxidized More in-depth test work is required to get the optimal dose to obtain considerable mass recovery.

show abstract

Flotation of Gold and Gold-Bearing Ores

Cited by 14 publications

References 88 publications

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga

Automated Mineralogy and Diagnostic Leaching Studies on Bulk Sulfide Flotation Concentrate of a Refractory Gold Ore

Implementation of Sodium Hydrosulfate (NaHS) Flotation with F83 and F515 on Mass Recovery of Gold Ore

Contact Info

Product

Resources

About