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Straight well stove volatilization roasting method is to be fuel with the coke, is raw material with the antimony sulfide, utilizes the easy volatile of antimony, and volatile substances such as antimony, arsenic, lead are become gaseous state, enters cooling, dust collecting system with furnace gas, thereby realizes separating the stibium xide that obtains purifying with …
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This method was never validated, but the authors reported that only 51% of the antimony was recovered from the traps [69]. Recently, a method developed originally for volatile arsines was used to ...
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Traditional smelting methods have been improved since the 1940s, but several novel achievements have been introduced in recent years. The long-established Herrenschmidt shaft furnace has been enlarged and modified into a Chinese-style antimony oxide furnace for volatilization roasting with use of high-temperature volatilization.
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The alkali method commonly uses Na 2 S and NaOH solution as leaching reagent to dissolve antimony from antimony concentrates ... In this study, the thermodynamic and kinetic of antimony volatilization from antimony-gold concentrates under oxygen-enriched air conditions were investigated systematically. The volatilization mechanism and behavior ...
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The addition of carbon caused mainly volatilization, with some reduction, of Sb2O3 and reduction of Bi2O3 to occur at nearly the same temperature, approximately 600 °C. However, volatilization of Bi was not …
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special furnace methods [8−9], and 3) electrolysis of a solution containing the metal in sodium sulphide [10−13]. Volatilization roasting−reduction smelting is mainly used to produce antimony from sulfide ores and concentrates. In this process, antimony sulphide is volatilized and then oxidized into antimony xide (Sb2O3) in a rotary kiln
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However, in the presence of oxygen, antimony can be volatilized efficiently as valentinite (Sb2O3) at low oxygen concentrations (approximately 1 to 5pct) at approximately 1173K to 1223K (900°C to ...
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methods for recovery of antimony can be generally classified into three types: 1) production of the xide via volatilization roast followed by reduction to metal,
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The primary step in antimony extraction is roasting stibnite ore to produce antimony xide (Sb₂O₃), followed by reduction using carbon or iron. Refinement can involve volatilization or electrolysis. For higher-purity antimony, …
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The invention discloses a method for controlling the resistivity of N-type single crystals by utilizing antimony volatilization. According to the invention, the high volatility of antimony is utilized, so that the concentration of antimony in a silicon melt is not increased due to segregation effect, the concentration of antimony in the melt is kept basically unchanged, and the uniformity of ...
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The current processes for producing high-purity antimony include electrolytic refining, chlorination-distillation-reduction, straight-pull purification, and regional smelting [10].Among these processes, the electrolytic refining method can produce 4 N antimony; however, electrolysis conditions are harsh, and the process produces the highly toxic gases AsH 3 and …
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This paper proposes vacuum distillation as a technical method for preparing antimony sulfide from heterogeneous antimony sulfide ores. The volatilization rate of antimony sulfide was measured at 5 Pa pressure. ... The volatilization of antimony sulfide was relatively flat within 773 ∼ 823 K, with a volatilization rate of 21.18 %. At 873 K ...
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The feasibility of a new method for separating arsenic from arsenic—antimony-bearing dusts using CuS was put forward, in which Sb was transformed into Sb 2 O 4 and Sb 2 S 3 that stayed in the roasted calcine while As was volatilized in the form of As 4 O 6.The factors such as roasting temperature and CuS addition amount were studied using XRD, EPMA and …
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A low-temperature and sulfur-fixing smelting process was applied to separate antimony from stibnite. The results show that the direct recovery rate of Sb is 90% (mass fraction), and the grade of ...
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The fate of antimony (Sb) in submerged soils and the impact of common agricultural practices (e.g., manuring) on Sb release and volatilization is understudied.
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Mo-tang and Gui-zhong proposed the BF volatilization-smelting route for the production of crude antimony oxide and antimony-copper matte to prevent the deportment of …
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Current production techniques of high-purity antimony include chemical processes (e.g., with antimony pentachloride), physical methods (e.g., distillation), or chemical-physical combination processes.
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The objectives of this work are: (i) to examine the thermal behaviors of antimony and arsenic oxides under various roasting conditions; (ii) to elucidate the significant influence …
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The volatilization rate of antimony sulfide increases rapidly with the increase of distillation temperature. When the temperature rises to 1073 K, the volatilization rate rises to 0.879 g cm −2 •min −1, and the volatilization rate increases by 4.37 times. The volatilization rate of antimony sulfide is more sensitive to distillation ...
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The volatilization of arsenic (As) and antimony (Sb) impurities in a copper ore consisting of tennantite (Cu 12 As 4 S 13)/tetrahedrite (Cu 12 Sb 4 S 13) by roasting in both nitrogen and air atmospheres was investigated in this study.The roasting experiments were performed at different temperatures ranging from 500 to 1200°C and different retention times from 15 to 60 minutes …
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In stibnite concentrate, the volatilization of antimony is gas–solid reaction, and the reaction steps are: (1) the solid state containing antimony is diffused outward in the material; …
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This paper proposes vacuum distillation as a technical method for preparing antimony sulfide from heterogeneous antimony sulfide ores. The volatilization rate of antimony sulfide was measured at 5 Pa pressure. Temperature and time effects on antimony sulfide enrichment were discussed. The results highlighted that the critical volatilization ...
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Volatilization smelting of antimony. sulfide flotation concentrate in blast furnace. Summary Test Report. Yong-Fu, X., Wei-Tao, Z., 1981. ... Methods. In this research, a preliminary study was ...
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Gold containing antimony ore is a type of refractory gold in which gold is intimately associated with stibnite (Guo et al., 2017). When the traditional cyanidation method is used for gold …
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Antimony(V) is volatilized by reaction with potassium bromide in concentrated sulfuric acid media. After volatilization, the gases can be transported to an inductively coupled …
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The traditional treatment method of antimony minerals is the smoke method [8,9]; this is because antimony–gold ore contains gold and other minerals, ... Process flow chart of electrodeposited antimony sulfide volatilization and enrichment of gold. The experimental device was a dual-temperature-zone tube furnace, produced by
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Microbial-mediated Sb volatilization is a poorly understood part of the Sb biogeochemical cycle. This is mostly due to a lack of laboratory and field-deployable methods that are capable of ...
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residue is 0.2%, and the effect of volatilization antimony from stibnite concentrate by electrothermal volatilization is better. ... Introduction There are two main types of modern antimony production methods—pyrometal-lurgy and hydrometallurgy [1–3]. At present, the former is the main. The vast
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In this study, an electrodeposited antimony sulfuration–volatilization method was. proposed to prepare antimony sulfide while enriching gold. The feasibility of the process.
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Electrodeposited antimony can be treated with sulfuration–volatilization technology, which causes antimony to volatilize in the form of antimony sulfide. During this process, gold is enriched in the residue, …
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