Investigation of mechanism of interaction of complexing agent diantipyrylmethane with sulfide minerals and cassiterite, included in the composition of refractory tin sulfide ores

In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and absence of chitosan and/or sodium cyanide depressant which is commercially used as pyrite depressant in sulfide mineral flotation process. Flotation recoveries and concentrate grades (assay) were studied as a function of polymer concentration and flotation time. It was found that at 50 g/ton, chitosan depressed 5.6% more pyrite as compared to conventional depressant NaCN at its optimum dosage. Furthermore, the measured assay values of pyrite in concentrates dropped by ~1.2% when NaCN depressant was replaced with chitosan polymer. Zeta potential measurements of galena, chalcopyrite, sphalerite, and pyrite suspensions before and after chitosan’s addition revealed that the polymer has preferential adsorption on pyrite minerals as compared to other sulfide minerals specially galena. Results obtained from this work show that chitosan polymer has a promising future as a biodegradable alternative to sodium cyanide for the purpose of depressing pyrite in sulfide minerals flotation.

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One Step Electrodeposition of Copper Zinc Tin Sulfide Using Sodium Thiocyanate as Complexing Agent

Journal of Electrochemical Science and Technology ◽

10.33961/jecst.2018.9.4.308 ◽

2018 ◽

Vol 9 (4) ◽

pp. 308-319 ◽

Cited By ~ 1

Author(s):

Rabiya Sani ◽

R. Manivannan ◽

S. Noyel Victoria

Keyword(s):

Sodium Thiocyanate ◽

Complexing Agent ◽

Tin Sulfide ◽

Copper Zinc Tin Sulfide ◽

One Step ◽

Copper Zinc

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Contrasting Geochemistry of Apatite from Peridotites and Sulfide Ores of the Jinchuan Ni-Cu Sulfide Deposit, NW China

Economic Geology ◽

10.5382/econgeo.4817 ◽

2021 ◽

Author(s):

Mei-Yu Liu ◽

Mei-Fu Zhou ◽

Shang-Guo Su ◽

Xue-Gen Chen

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Limit Of Detection ◽

Sulfide Minerals ◽

Hydrothermal Fluids ◽

Sulfide Deposit ◽

Volatile Components ◽

Sulfide Ores ◽

Sulfide Ore

Abstract Apatite is present within both the hosting lherzolite and sulfide ore at the Jinchuan magmatic Ni-Cu sulfide deposit of northwest China. Apatite grains within the lherzolite are generally large and hexagonal (>200 μm) and are associated with interstitial phlogopite and amphibole. These apatite grains contain ~0.9 wt % F, ~1 wt % Cl, 6,800 to 14,500 ppm rare earth elements (REE) and have in situ δ18OV-SMOW values of 5.10 to 6.38‰, all of which are indicative of crystallization from an evolved silicate magma. In comparison, the massive and disseminated sulfide ores contain fine-grained apatite (<200 μm) that is associated with sulfide minerals, phlogopite, and albite. These apatite grains contain sulfide inclusions that are indicative of crystallization almost coevally with or slightly later than the sulfide minerals. They are Cl-rich apatite with an average Cl of 5.6 wt % but F concentrations are below the limit of detection. They contain 1,860 to 2,300 ppm REE and have in situ δ18OV-SMOW values of 5.62 to 6.47‰. These data suggest that the sulfide-associated apatite formed from F- and REE-depleted, Cl-bearing sulfide melts. The apatite within the lherzolite was overprinted by later hydrothermal fluids as evidenced by the presence of abundant rounded and needle-like monazite and rare allanite inclusions within the apatite that formed as a result of a coupled metasomatism-reprecipitation process shortly after crystallization. Altered and fresh apatite domains have similar δ18O values, suggesting that this alteration was induced by postmagmatic hydrothermal fluids. The apatite within the lherzolite and sulfide ore crystallized from two conjugate immiscible silicate and sulfide melts, respectively. Rare earth elements and F were preferentially partitioning into silicate melts, whereas most volatile components were mainly partitioned into the sulfide melts. The silicate magmas from which apatite crystallized were rich in light REE (LREE) relative to heavy REE (HREE). Volatile components in the sulfide melts changed the physicochemical conditions to enable such high-density melts to migrate upward and finally settle in the shallow chamber with silicate rocks.

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Substantiation of the Erdenetiyn-Ovoo copper-molybdenum ore flotation technology with the use of tertiary acetylene alcohol

Non-ferrous Metals ◽

10.17580/nfm.2020.02.01 ◽

2020 ◽

pp. 3-10

Author(s):

T. I. Yushina ◽

B. Purev ◽

B. Namuungerel

Keyword(s):

Porphyry Copper ◽

Chemical Properties ◽

Sulfide Minerals ◽

Allyl Ether ◽

Factors Affecting ◽

Allyl Ethers ◽

Mechanism Of Interaction ◽

Physical And Chemical ◽

Copper Ores

The article presents the results of a study of the factors affecting the efficiency of the copper-molybdenum ore flotation. The objective of this work was to substantiate and develop a reagent mode for flotation of the Erdenetiyn-Ovoo porphyry copper ores, which makes possible extracting main copper and molybdenum minerals into corresponding concentrates more fully and selectively. It is shown that the use of a DC-80 (2-methyl-3-butin-2-ol) flotation reagent in assosiation with the main base mode reagents — an AERO MX-5152 (a mixture of allyl ethers of xanthogenic acids with n-butyloxycarbonyl-O-n-butylthionocarbamate) combined nonionized collector, a BK-901B (a composition of dialkyldithiophosphate and O,N-dialkyldithiocarbamate) blending ionized collector; diesel fuel; a MIBC (methyl isobutyl carbinol) frother; sodium sulphide Na2S as a modifier and lime СаО as a pH regulator of the medium allows obtaining a noticeable, economically sound additional recovery of both copper and molybdenum. Quantum chemical calculations have permitted to establish an important feature of the mechanism of interaction between the DC-80 molecules that can form stronger complexes based on -bonds with metal cations of sulfide minerals in comparison with allyl ethers of xanthogenic acids. The energy indicators of the formation of bonds between Cu2S, the DC-80 molecules and allyl ether of xanthic acid were calculated. There were shown the models of the assumed interaction of small mineral particles with air bubbles during flotation, which are determined by physical and chemical properties of the molecules of acetylene-containing reagents. The principal difference between the properties of the foam bubbles formed by acetylene-containing molecules for at least 50% and that of the ordinary foam bubbles formed by standard frothers has been demonstrated in the view of the mechanism of their fixing on the surface of small particles of sulfide minerals and the surface of the bubbles. The optimal flotation mode, comprising a DC-80 reagent, BK-901B and AERO MX-5152 base collectors has been developed. The application of this mode will allow increasing the copper and molybdenum recovery into concentrates by 0.62% and 5.76%, respectively, reducing the flotation time by 35–40%, and improving the quality of resulting concentrates. Based on the research results, it is recommended to incorporate the DC-80 acetylene reagent into the basic flotation mode for conducting pilot tests at the Erdenet Mining Corporation enterprises (Mongolia).

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Sperrylite saturation in magmatic sulfide melts: Implications for formation of PGE-bearing arsenides and sulfarsenides

American Mineralogist ◽

10.2138/am-2017-5631 ◽

2017 ◽

Vol 102 (5) ◽

pp. 966-974 ◽

Cited By ~ 16

Author(s):

Liping Bai ◽

Sarah-Jane Barnes ◽

Don R. Baker

Keyword(s):

High Temperatures ◽

Low Temperatures ◽

Iron Concentration ◽

Metal Sulfide ◽

Sulfide Minerals ◽

Sulfide Ores ◽

Base Metal Sulfide ◽

Transitional Metal ◽

Sulfide Melt ◽

Magmatic Sulfide

Abstract Sperrylite (PtAs2) is one of most common Pt minerals, but the processes whereby it forms are not clearly established. Most commonly it is associated with the major-component base metal sulfide minerals (pyrrhotite, pentlandite, and chalcopyrite), which are believed to have crystallized from magmatic sulfide melts. Hence, sperrylite is thought to have formed by crystallization from a sulfide melt or by exsolution from sulfide minerals. However, sperrylite is also found associated with silicate and oxide minerals where it is thought to have formed by crystallization from the silicate magma. To investigate the conditions under which sperrylite could crystallize from a magmatic sulfide melt we investigated sperrylite saturation in Fe-Ni-Cu-S sulfide melts under controlled fO2 and fS2 at 910–1060 °C and 1 bar. The As and Pt concentrations in the sulfide melt at sperrylite saturation increase from 0.23–0.41 to 2.2–4.4 wt% and from 0.36–0.65 to 1.9–2.8 wt%, respectively, as the iron concentration in the sulfide melt decreases from 50 to 36 wt% at 910–1060 °C. We show that transitional metal concentrations, particular iron and nickel, as well as sulfur and oxygen fugacities influence As and Pt concentrations in the sulfide melt at sperrylite saturation. These intensive variables appear to effect sperrylite solubility by influencing the oxidation state of As in the sulfide melt. The measured concentrations of As and Pt in sperrylite-saturated sulfide melts produced in our experiments are much higher than that in most natural sulfides, implying that arsenides and sulfarsenides will not reach saturation in natural magmatic sulfide melts at high temperatures unless the magma has been contaminated with an exceptionally As-rich rock. This suggests that the observed arsenides and sulfarsenides in natural sulfide ores were not formed by crystallization from unfractionated sulfide melts at high temperatures above 900 °C, but might form at low temperatures below 900 °C.

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