##tihuan2##The sulfur content in the flotation concentrate was about S (13.6 %), and the silica content was SiO 2 (22.7 %). The profile of the flotation concentrate after flotation was presented in Table 2. Table 2. Elemental composition of the flotation concentrate used for the bioleaching tests. Cu (%) ... Sb (ppm) Se (ppm) 0.063: 15 <15 <8 <1: 69 …
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##tihuan2##Using the equilibrium constants for the Sb 2 S 3 (s) from the HSC software, and considering the effect of temperature on the equilibrium HS − /S −2, the molar fraction diagram, as function of the pH at 140 °C, is plotted in Fig. 8 d. In the expected conditions, the Sb 2 S 4 −2 species is predominant in the solution. When analysing the ...
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##tihuan2##The predominant form of Sb in ores is stibnite (Sb 2 S 3 ) which is exploited for the recovery of Sb and precious metals, gold, and silver (Bagherifam et al., 2019a; Mahlangu et al., 2006). It has ...
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##tihuan2##Reductive--oxidative pretreatment of stibnite flotation concentrate TABLE 1 Chemical composition of the stibnite flotation concentrate (%) 565 S Fe As Cu [Sb Pb ] Zn Au(g/t) Ag(g/t) Other [ 20.6 5.24 0.61 0.27 44.48 0.28 0.25 32.0 86.0 28.27 TABLE 2 Mineralogical analysis of the stibnite flotation concentration (%) ] Pyrite Arsenopyrite ...
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##tihuan2##The flotation behavior, smelting process, various properties of jamesonite (Pb 4 FeSb 6 S 14) and application of its extraction products were introduced.Jamesonite, as a sulfide mineral with complex composition and structure, is mainly distributed in China. It is usually associated with other sulfides with similar properties. Although the mineral was …
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##tihuan2##1. Background. Antimony is a silvery, white, brittle, crystalline solid that exhibits poor conductivity of electricity and heat. It has an atomic number of 51, an atomic weight of 122 and a density of 6.697 kg/m 3 at 26 °C. Antimony metal, also known as 'regulus', melts at 630 °C and boils at 1380 °C.Antimony and the natural sulfide of …
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##tihuan2##In this study, feldspar ore was successfully enriched using a two-stage process. Initially, dry magnetic separation was employed to remove iron oxide, followed …
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##tihuan2##The contents of Au, C, S, As and Sb in the sulfide ore are approximately 2 ... The flotation concentrate obtained under the most promising conditions (kerosene emulsion 500 g t-1) contained 51 % of gold, while 49 % of the gold reported to the flotation tailings. The gold recovery models predicted that gold recovery from (1) …
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##tihuan2##The dependences of effects of the temperature, time, L/S ratio and NaOH concentration on the extraction antimony and sulfur from the flotation concentrate have been determined.
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##tihuan2##The high arsenic content of the flotation concentrate obtained from a gold-bearing enargite ore for pyrometallurgical processing strongly diminishes its market value.
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##tihuan2##The combined concentrate described above included a gravity cleaner concentrate and flotation rougher concentrate (from locked-cycle testing on the gravity tailing). The gravity concentrate was 0.16% of the feed weight, assayed 920 g/t Au and 5,750 g/t Ag and represented gold and silver recoveries of 22.4% and 4.4% respectively.
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##tihuan2##Framboidal pyrites consisted of concentric zones having high Sb concentrations accompanying Ag. Sb and Ag also exist as Sb-S and Sb-Ag-S nanoparticles composed during pyrite growth or 729 crystallisation. In this study, bulk flotation of sulphides to recover gold and silver from Akoluk refractory ore was investigated.
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##tihuan2##Locked-cycle flotation tests indicate recoveries of 94.8% for gold and 89.8% for silver in a combined gravity and flotation concentrate. The combined gravity and …
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##tihuan2##On the contrary, in the bulk method of flotation, which was aimed at maximizing the gold (Au) recovery, the maximum Au recovery of 90.6% obtained after 60 min of flotation at the grind size with d 80 of 146 μm. The bulk flotation method as a pre-treating method resulted in the concentrate with less toxic chemical elements such as …
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##tihuan2##In practice, Q slurry,conc in vol% can be calculated through the weight of the concentrate (m slurry,conc, kg), the solids concentration (θ solid, %) in the concentrate, the average density of solids in the concentrate (ρ solid, kg/m 3), the density of liquid (water in this case) in the concentrate (ρ liquid, kg/m 3) and flotation time (t, s ...
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##tihuan2##Addressing issues such as a low operational condition recognition efficiency, strong subjectivity, and significant fluctuations in Outotec X fluorescence analysis data in copper flotation production, a copper concentrate grade classification model is constructed based on image processing technology and the Stacking ensemble learning …
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##tihuan2##Separation and recovery of Pd(II) and Pt(II) from cyanide liquors of Pd-Pt flotation concentrate via solvent extraction. Muhan Chen, Muhan Chen. School of Chemical Science and Technology, Yunnan University, Cuihu North Road No. 2, Kunming, PR China. Search for more papers by this author.
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##tihuan2##Mechanical entrainment plays a major role in the quality of the flotation concentrate and the separation selectivity [7]. In addition, turbulence tends to increase the particle detachment in flotation cells. ... M3 M4 M5 M6 M7 M8 M9 M10 Air flow rate (2 L/min) Impeller diameter (cm) Impeller speed (rpm) db (µm) Jg (cm/s) Sb (s−1 ) 6 800 341 ...
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##tihuan2##And as a result of the flotation test carried out with optimum values, a concentrate assaying 66.8 % Sb content with 79.5 % recovery was obtained while the arsenic content was found as 0.3 % ...
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##tihuan2##Hydrometall orgical investigations of gold antimony flotation concentrate have been carried out. XRD and chemic alanalyses of the concentrate have been studied. ... The Pourbaix diagram for Sb-S ...
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##tihuan2##Table 17.3 Gold recovery obtained using different flowsheets [5] Product Single-stage grind-flotation Two-stage grind-flotation Three-stage grind-flotation % Recovery in concentrate Tailing assays (%, g/t) Au Ag Sb As S Au Ag Sb As S 88.1 92.2 95.3 89.2 91.8 95.2 72.9 93.4 95.7 68.4 78.7 81.2 70.1 81.2 85.7 1.7 1.0 0.7 5.0 4.1 2.2 0.04 0.015 …
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##tihuan2##The flotation recovery of the sulphidized cervantite is over 90%. A flotation concentrate grading 21.04% Sb with a recovery of 77.15% is achieved by sulphidization roasting and flotation from a feed grading 1.11% Sb in which cervantite is the main antimony mineral.
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##tihuan2##Before the Sb–Pb rougher flotation, the Sb–Pb–Zn–S bulk concentrate was reground to 81% (w/w) below 74 μm and then added to a 0.75 L XFDIII single-trough floatation cell.The impeller speed was 2200 rpm.The reagents were added in the following order: a) 1.5 kg/t of lime (CaO) (to neutralize the H 2 SO 4 added in the stage of the bulk …
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##tihuan2##The gravity concentrate was not assayed for sulphide sulphur. The flotation concentrate was 10.74% of the whole feed weight, assayed 44.3 g/t Au, 1,665 g/t Ag and 21.9% sulphide sulphur and ...
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##tihuan2##Results show that well over 80% reduction of stibnite to antimony (Sb) and hydrogen sulphide (H 2 S) is achieved, the extent of reduction being pH and reductant …
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##tihuan2##Froth flotation is the most important mineral processing technology for the production of valuable mineral concentrates from which metals and minerals are obtained. Practically …
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##tihuan2##Locked-cycle flotation tests indicate recoveries of 94.8% for gold and 89.8% for silver in a combined gravity and flotation concentrate.
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##tihuan2##Antimony minerals with industrial value include antimonite (Sb 2 S 3), senarmontite (Sb 2 O 3), cervantite ... Antimonite ore is processed by hand-picking–flotation or heavy medium separation–flotation to pick out lump ore, rich lump ore, and concentrate that will go into the smelting process. ... During processing of sulfide concentrate ...
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##tihuan2##Section snippets Flotation concentrate and reagents. The stibnite flotation concentrate sample from Tiger Reef Mine, Zimbabwe, contained about 70% Sb 2 S 3 with relatively small amounts of pyrite (1.4%), arsenopyrite (1.8%) and chalcopyrite (0.4%). The concentrate was both gold (68.6 g/t) and silver (26.5 g/t) bearing and refractory to …
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