Many of our largest copper deposits contain both sulfide and oxidized copper minerals. The large porphyry mines, with a total copper content of from 1.3 to 2.0 per cent., send to their mills ore with an oxide content of from 0.2 to 0.4 per cent. While the recoveries of the sulfide minerals are considered satisfactory, using modern flotation ...Web
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Selective Flotation of Elemental Sulfur from Pressure Acid Leaching Residue of Zinc Sulfide by Guiqing Liu 1,2, Kaixi Jiang 1, Bangsheng Zhang 2, Zhonglin Dong 3,*, Fan Zhang 2, Fang Wang 2, Tao Jiang 3 and Bin …Web
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The operation objective of a sulfur flotation process is to recover as much as high-graded sulfur as possible from the mineral residue by finding the optimal …Web
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Sulfur flotation process is a typical industry process with complex dynamics. For a sulfur flotation cell, the structure of the system model could be derived using first-principles and reaction kinetics. However, the model parameters cannot be obtained under certain working conditions. In this paper, by using adaptive dynamic programming (ADP), …Web
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The recovery of elemental sulfur is highly dependent on the particle size distribution of the sulfidic micropellets. Typically, these pellets should be greater than 44 μm and less than 150–200 μm in diameter.If the particles become too fine, they behave like slimes in a flotation circuit and report to the tailings, thereby reducing elemental sulfur …Web
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The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite can lead to excessive particle entrainment, increase of froth, and low separation efficiency. ... The flotation test results obviously show that sodium silicate is an effective ...Web
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Test 1 showed that the sulfur content of flotation product was 1.73 % and the combustible recovery was only 26.46 % after CS was oxidized by H 2 O 2 for 30 min, …Web
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Self-aeration XFD-63 flotation machine was used as the equipment of test. When the experiment was begun, the residue and tap water were put into the flotation cell and the pH value of the formed pulp was adjusted to around 8.0 with lime. ... In order to study the effect of middling return on sulfur flotation, a closed-circuit flotation ...Web
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Additions of three arious dosages of sodium silicate to the sulfur flotation werev tested. Pine oil of 20 g/t and kerosene of 20 g/t were also added in each test. Pulp pH was maintained at about 6. The flotation results are shown in Table II. Table II. The effect of sodium silicate on sulfur flotation. Test No. Sodium silicate, g/t Grade, %Web
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The micro-flotation test results showed that K3[Fe(CN)6] had a considerable depression effect on Pb²⁺-activated sphalerite. ... The ICP test revealed the gradual reduction in sulfur ion ...Web
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The flotation test results of actual copper sulfide ore showed that pre-magnetized butyl xanthate could increase the copper recovery of copper concentrate by 3.06 percentage points and the sulfur recovery of …Web
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For the disseminated copper-sulfur ore, the preferential flotation process is adopted, and the sulphur in the tailings must be re-floated. ... For the selection of copper oxide minerals, it is best to …Web
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As the mainstreams of bauxite desulfurization technologies, the bauxite pre-desulfurization (roasting, electrochemistry, biology, flotation, etc) and Bayer process …Web
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The traditional treatment method is to carry out a flotation test to explore new collectors and then use quantum chemistry, Fourier transform infrared (FTIR), adsorption capacity measurement, zeta potential, and X-ray photoelectron spectro- scopy (XPS) to investigate interaction mechanisms between the collector and minerals [16âˆ'23].Web
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The AF 5 collected of the elemental sulfur and for a 1:1 ratio of AF 5 to concentrate, the loaded AF 5 gained 12.3 wt% sulfur after the first acidic Albion leach test and contained 24.3 wt ...Web
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The different particle size fraction was obtained using standard test sieves. The sieves production with the particle fraction of −74 + 38 μm was used in micro-flotation experiments and sulfur ions adsorption experiments,and the fraction finer than 5 μm was used in zeta potential measurement and XPS analysis. X-rayWeb
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ton of sulfur (as hydrogen sulfide) gave satisfactory results at the test plant of the Magma Copper Company on malachite. Sodium sulfide has been tested at the concentrators of a number of the larger copper companies, having been added to the flotation machines or to conditioning tanks before flotation as tests showed that better sulfidlzing of theWeb
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The raw ore flotation test showed that IPETC displayed superior flotation performance to the elemental sulfur compared with sodium ethyl xanthate () and ammonium dibutyl dithiophosphate (ADDTP ...Web
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An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The process mineralogy analysis showed that the sulfur content reached 46.21%, and 81.97% of the sulfur existed as elemental sulfur which was the major mineral in the residue and …Web
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This study adopted the flotation process of one roughing, three sweepings, and three cleanings, obtaining the cobalt–sulfur concentrate with a cobalt grade of 2.08%, sulfur content of 36.12%, …Web
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O-isopropyl-N-ethyl thionocarbamate (IPETC) collector was used to selectively recover elemental sulfur from a high-sulfur residue, and its flotation performance, structure–property relationship and adsorption mechanism to elemental sulfur were studied. The raw ore flotation test showed that IPETC displayed superior flotation performance …Web
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Flotation test flowsheet and water sampling points. Table 4. Flotation conditions and chemicals used for flotation of the Cu-Pb-Zn sulfide ore from the Iberian Mine. ... The sulfur-based anions, i.e. sulfate, tetrathionates and thiosulfates, could effectively be removed by both the fresh and the regenerated resins. The sulfate ion …Web
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A proper flotation flowsheet was then proposed based on experimental condition and closed-circuit test. ... O 3, Fe 2 O 3, etc. Au was the main marketable element, and the component contents of the samples were Au 4.89 g·ton −1, sulfur 3.64 % ... According to the above flotation condition test about activator and collector for gold …Web
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Section snippets Selecting collectors. If one considers natural flotation to be a direct consequence of a sulfur-rich mineral surface, the role of suitable industrial collectors for such minerals should be to assist in this naturally derived hydrophobicity and not to replace or overcome such a tendency with another chemical mechanism of collector …Web
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The majority of chalcopyrite remains in the sulfur flotation tailings and can be readily recovered by flotation with different flotation reagents. When amyl xanthate is used, 85% of chalcopyrite ...Web
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It is the first successful attempt in the world for sulfide mining. Furthermore, by the flotation test using 15 tons of ore, 2 tons of the concentrate with a sufficient grade of zinc were recovered and charged into the furnace of the existing domestic smelter. ... After removing sulfur at 500 °C, iron oxide concentrate is mixed with calcium ...Web
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Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. ... FT-IR test was conducted on pyrite and pyrite with NPC interaction, and the results are shown in Fig. 17.Web
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Flotation test results for the multi-stage desulfurization of porphyry copper ... The main results demonstrated that sulfur recovery can reach up to 97 % using the following optimal conditions: pH ...Web
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According to the rougher flotation test results, a concentrate with a Co grade of 0.46% and a Co recovery of 84.15% was obtained. ... and around 4000 g/t sulfuric acid was saved during the ...Web
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The mechanism of electrochemical interaction between chalcopyrite and hexagonal pyrrhotite was analyzed via electrochemical interaction, copper ion concentration testing, and X-ray photoelectron spectroscopy (XPS) characterization. Besides, the effect of electrochemical interaction between the two minerals on the flotation separation was …Web
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The flotation speed test results show that the sulfur and ash content of the cleaned coal after ultrasonic pretreatment are reduced by 33.84% and 32.09% …Web
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Guney et al. [8]; performed flotation studies on the asphaltite sample containing 43.69% ash and 4.64% total sulfur. Approximately 100 g/t isooctanol was …Web
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The flotation test results obviously show that sodium silicate is an effective regulator for flotation desulfurization and can not only improve inhibition of pyrite caused …Web
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Test 1 showed that the sulfur content of flotation product was 1.73 % and the combustible recovery was only 26.46 % after CS was oxidized by H 2 O 2 for 30 min, indicating that pyrogallol inhibited the flotation of clean coal. Tests 2–5, on the other hand, showed that when no inhibitor was added, the sulfur content in the product ranged from ...Web
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The effect of Z-200 dosage on the grade and recovery of sulfur in flotation concentrate was investigated at a pulp concentration 35% and polyacrylamide dosage of 50 g/t, ... After repeated conditional test, the optimal hot filtration temperature and time were separately 145 °C and 2 h, under which 85.32% of the elemental sulfur in the ...Web
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