Flotation concentration of the sulfide antimony-arsenic gold-bearing ore

Канарский, А В; Adamov, E. V.; Крылова, Л. Н.

doi:10.3103/s1067821212020058

Cited by 6 publications

(4 citation statements)

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“…However, the coarse particle size fraction had a low amount of iron, and the smallest particle size fraction had the highest contents of alumina and iron, which could be related to the lowest concentration of the amorphous glassy mass. The lowest concentrations of Na 2 O and K 2 O in the −50 µm-sized fraction confirmed that these oxides were associated with aluminosilicates [38][39][40]. Figure 1 shows the XRD pattern of the raw CFA.…”

Section: Raw Materialsmentioning

confidence: 81%

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Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation

Shoppert,

Valeev,

Loginova

et al. 2023

Metals

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Coal fly ash (CFA) is a technogenic waste formed during coal combustion in thermal power plants (TPPs). The extraction of valuable components from CFA is complicated by the presence of a large amount of amorphous glassy mass and iron. Herein, a novel method of CFA desilication with complete extraction of the amorphous glassy mass without desilication product (DSP) precipitation and simultaneous magnetic fraction recovery in one stage is presented. The Fe recovery in the magnetic fraction using the proposed method was significantly improved from 52% to 68%. After conventional wet magnetic separation, followed by the proposed method for desilication and magnetic fraction separation, the Fe recovery was increased to 73.8%. Because of the absence of DSP precipitation, the Na2O content in the solid residue after desilication was lower than 1 wt.%. The simultaneous desilication and magnetic separation of magnetite was achieved by installing a belt of permanent magnets on the outer surface of the reactor, where the CFA was leached by the highly concentrated NaOH solution. The effects of different parameters on the extraction of Si, Al, and Fe from the raw CFA were elucidated by varying the liquid-to-solid ratio (L:S ratio) from 5 to 10, the temperature from 100 to 120 °C, the leaching time from 10 to 30 min, and the particle size from −50 µm to −73 µm. The optimal leaching parameters were determined to be temperature = 110 °C, L:S ratio = 7.5, and leaching time = 20 min. The extraction of Si and Fe under these conditions was higher than 66 and 73%, respectively. The Al extraction was lower than 10%. The solid residue of NaOH leaching and the magnetic fraction were examined by X-ray diffraction, X-ray fluorescence spectrometry, vibrating sample magnetometry, scanning electron microscopy with energy-dispersive X-ray spectroscopy, Brunauer–Emmett–Teller, and laser diffraction analyses.

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Section: Raw Materialsmentioning

confidence: 81%

“…where E is the efficiency index (%). If E > 75%, the enrichment process is highly efficient, if 50% < E < 75%, it is efficient, whereas if E < 25%, it is inefficient [40].…”

Section: Discussionmentioning

confidence: 99%

Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation

Shoppert,

Valeev,

Loginova

et al. 2023

Metals

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“…The choice and justification of the pyrometallurgical technology primarily depend on the antimony content in the initial concentrate. Gold is considered a byproduct in the antimony refining process [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Development of a Two-Stage Hydrometallurgical Process for Gold–Antimony Concentrate Treatment from the Olimpiadinskoe Deposit

Rusalev¹,

Rogozhnikov

Dizer

et al. 2023

Materials

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An integrated two-stage metallurgical process has been developed to process concentrates from the Olimpiadinskoe deposit, which contain high levels of antimony and arsenic. The optimal parameters for the alkaline sulfide leaching process of the initial concentrate from the Olimpiadinskoe deposit were determined to achieve the maximum extraction of antimony at a 99% level. The recommended parameters include an L:S ratio of 4.5:1, a sodium sulfide concentration of 61 g/L, a sodium hydroxide concentration of 16.5 g/L, a duration of 3 h, and a temperature of 50 °C. A synergistic effect of co-processing alkaline sulfide leach cakes with sulfuric and nitric acids was observed. The pre-treatment step reduced the nitric acid composition by converting carbonates into gypsum and increased the arsenic extraction by 15% during subsequent nitric acid leaching. The laboratory research on the nitric acid leaching of decarbonized cake established the key parameters for the maximum iron and arsenic extraction in solution (92% and 98%, respectively), including an L:S ratio of 9:1, a nitric acid concentration of 6 mol/L, and a time of 90 min. Full polynomial equations for the iron and arsenic extraction from the decarbonized cake were derived. The model demonstrated a high relevance, as evidenced by the determination coefficients (R2) of 96.7% for iron and 93.2% for arsenic. The technology also achieved a high gold recovery rate of 95% from the two-stage alkaline sulfide and nitric acid leach cake. Furthermore, the maximum deposition of arsenic from the nitrate leach solution in the form of insoluble As2S3 was determined to be 99.9%. A basic technological flow sheet diagram for processing the flotation gold–antimony concentrate from the Olimpiadinskoe deposit was developed, including two stages: the production of metallic antimony and the gold extraction from the nitric leach cake.

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“…More recently, there was an attempt to develop an environmentally friendly flotation process for the selective separation of arsenic. 25) Nevertheless, no attempt to investigate arsenic removal from mine tailings through flotation has been made in South Korea. Therefore, considering the regional diversity of mine tailings in terms of physicochemical and mineralogical characteristics, relevant studies are required.…”

Section: Introductionmentioning

confidence: 99%

Arsenic Removal from Mine Tailings for Recycling via Flotation

et al. 2013

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In this study, we propose a flotation process to remove the arsenic from Samkwang mine tailings in South Korea, which contained a high arsenic content, in order to render them suitable for recycling. In order to maximize the arsenic removal from the mine tailings, three variables (type of collectors and activators, and solution pH) were systematically investigated. Characterization experiments (X-ray diffraction and electrokinetic property analyses) were carried out to complement the flotation results, and the results showed that the mine tailings were mainly composed of arsenopyrite (FeAsS), arsenic trioxide (As 2 O 3 , As 4 O 6 ), arsenic pentoxide (As 2 O 5 ) and quartz (SiO 2 ). The flotation results obtained using different collectors (i.e., potassium amyl xanthate (PAX), sodium oleate, sodium dodecyl sulfate) revealed that arsenic removal efficiency was greatest in the presence of PAX, which was explained by the difference in the electrokinetic properties and the interaction type of collectors with arsenic-bearing minerals. Meanwhile, the addition of activators (Na 2 S, CuSO 4 , Na 2 S+CuSO 4 ) and the pulp pH significantly affected the arsenic removal efficiency. The arsenic removal was maximized in the presence of mixed activators (Na 2 S+CuSO 4 ) at low pH. The effect of activator type and pulp pH on the arsenic removal efficiency was attributed to the coupled role of the sulphidization of arsenic oxides (e.g., AS 2 O 3 , AS 4 O 6 and AS 2 O 5 ), the activation of sulphidized minerals, and the formation of dixanthogen. Lastly, based on the results obtained from the parameter optimization tests (i.e., type of collector and activator, and pulp pH), a series of flotation processes consisting of rougher flotation and two subsequent scavenging flotations was designed. The results demonstrated the capability of the process to successfully remove arsenic from Samkwang mine tailings for recycling.

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Flotation concentration of the sulfide antimony-arsenic gold-bearing ore

Cited by 6 publications

References 0 publications

Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation

Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation

Development of a Two-Stage Hydrometallurgical Process for Gold–Antimony Concentrate Treatment from the Olimpiadinskoe Deposit

Arsenic Removal from Mine Tailings for Recycling via Flotation

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