antimony sulfide ores
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- antimony sulfide ores
Estimates of the abundance of antimony in the Earth's crust range from 0.2 to 0.5 parts per million. Antimony is chalcophile, occurring with sulfur and the heavy metals, lead, …
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This seminal paper should usher in a new environmentally sound methodology for extraction of metals from sulfide ores." Hryn adds that although this demonstration used one specific metal, "The primary …
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Abstract. 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 …
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The most promising methods for separating antimony and bismuth minerals from sulphide ores are based on pH and/or pulp potential adjustments or the use of starvation levels of collector.
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Jhunalyn Parantar. Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done by giving the sulphide ore an oxidizing-sulphatizing roast.
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In general the lowest grades of sulfide ores containing 5–25% antimony are volatilized to antimony xide: 25–40% antimony ores are smelted in a blast furnace: and 45–60% antimony ores are treated by liquation or iron precipitation. A description of each of these as well as oxide reduction follows (Motoo, 1974, Vladislav, 1981, Yong-Fu ...
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stibnite, antimony sulfide (Sb 2 S 3 ), the principal ore of antimony. This mineral has a brilliant metallic lustre, is lead- to steel-gray in colour, and fuses readily in a candle flame (at about 525° C [977° F]). It often possesses a bladed habit, is striated, and has one perfect …
به خواندن ادامه دهیدBy way of example we demonstrate the production of high-purity liquid antimony via direct electrolysis of the molten semiconductor, antimony sulfide (Sb 2 S 3), derived from its predominant ore ...
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Sodium sulfide solutions are effective leaching agents for the concentration of stibnite from ores. Electrolysis of these solutions produces antimony. After further purification of the crude antimony, the metal, …
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Arsenic and antimony are environmental pollutants associated with several diseases, including skin cancer. One of the main sources of both elements is the oxidation of sulphide minerals, particularly arsenopyrite and therefore any of both elements is a concern in gold mining operations because arsenic- and antimony-bearing sulphides may …
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Aurostibite is a refractory mineral that is usually successfully broken open by firing (Rohner and Millard, 1990). However, heat treating refractory concentrates is becoming more and more uneconomical due to environmental considerations, especially since arsenic is often more or less associated with antimony sulfide ores.
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Basically, refractory gold ores (gold recovery efficiency of <50% in average using direct cyanidation) are classified into sulfide, tellurium and carbon ores. Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide gold ores (Ubaldini and Vegliò, 2000, Saba, 2011 ...
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It is naturally found in Earth's crust layer in the ores of stibnite and valentinite. The Antimony symbol is, Sb, and the antimony atomic number is 51. ... Antimony sometimes found in a pure form. Also, it is obtained from the mineral stibnite (antimony sulfide), and commonly it is a by-product of lead-zinc-silver mining. Few other antimony ...
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was, along with lead sulfide, a principal ingredient of kohl, the thick black paste used by the Egyptians and others as a cosmetic for coloring eyebrows and lining the eyes. The Chaldeans knew the art of winning the metal from its ores and casting it into ornamented vessels by 4000 B.C. It was being used as a plating on copper articles in Egypt
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Geologically, native antimony is rare, and it is mostly found in sulfide ores. The main ore minerals of antimony are antimonite and jamesonite. The extensive mining and use of antimony have led to its introduction into the biosphere, where it can be hazardous, depending on its bioavailability and absorption.
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1. Arsenic and antimony: Sources and toxicity. Arsenic (As) and antimony (Sb) are trace elements with metalloid properties, showing a wide distribution in the environment (Kabata-Pendias & Mukherjee, …
به خواندن ادامه دهید1. 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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Alkaline sulfide system is mainly a mixture consists of sodium sulfide and sodium hydroxide, which has strong selectivity for leaching of tin, gold, antimony, arsenic and mercury (Anderson and Twidwell, 2008). In high pH condition, S 2-can selectively remove arsenic from enargite.
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Antimony sulphide is one of the ingredients used in safety matches. It is used in solar panels to improve stability of the solar ... Table – 9 : Imports of Antimony Ores & Conc. (By Countries) 2018-19 (R) 2019-20 (P) Country Qty Value Qty Value (t) (` '000) (t) (` '000) All Countries 7496 1609648 7655 1265983
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Antimony is found in trace quantities in nature but is chiefly obtained from mineral ores such as valentinite (Sb2O3) and stibnite (Sb2S3). ... To a lesser extent, antimony sulfide is used in ...
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Leaching and Recovering Gold from Antimony Minerals Stibnite (Antimony Sulphide, Sb2S2) This mineral in an ore acts as a weak acid, combining with alkalis to form salts, of the order of M1/3SbS2 and M1/3SbS4 alkaline sulphantimonite and sulphantimonate, especially in the presence of iron sulphides, using high concentrations …
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The sulphide minerals are compounds of the metals with sulphur. Nearly all these minerals have a metallic luster, i.e., the peculiar shining appearance of metals, such as gold, silver, copper, lead, tin, iron, etc. ... variable proportions, with copper from 44% to 71%; cleavage, almost absent. Bornite is found mostly with other copper ores ...
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Antimony is sometimes found in pure form. It is also obtained from the mineral stibnite (antimony sulfide) and commonly is a by-product of lead-zinc-silver mining. Other antimony-bearing minerals include sibiconite, tetrahedrite and ullmannite. It is mined in China, Bolivia, South Africa and Mexico.
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Removing of Antimony from Antimonial Refractory Gold Ores. The main antimony phase of antimonial refractory gold ores is stibnite (Sb 2 S 3). Sodium sulfide is proposed as leaching agent to remove antimony from antimonial refractory gold ores . Meanwhile, sodium hydroxide is also used to prevent the hydrolysis of sodium sulfide.
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Depending on the concentrations of gold and antimony, different categories of Au-Sb-containing sulfide ores can be distinguished: (1) ores in which gold is the main …
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Sulfide ores with antimony contents between 5 and 25% are roasted to give volatile Sb. 2. O. 3. which is reduced directly to the metal. Low-grade and complex ores or ores in which minerals are finely dispersed are beneficiated by flotation (Herbst . et al., 1985). Production/Import Level:
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Hence a major source of antimony and bismuth is flue dust obtained by smelting the sulfide ores of the more abundant metals. In group 15, as elsewhere in the p block, we see large differences between the lightest …
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Antimony has been known and used since ancient times, but its applications have increased significantly during the last two centuries. Aside from its few medical applications, it also has industrial applications, acting as a flame retardant and a catalyst. Geologically, native antimony is rare, and it is mostly found in sulfide ores. The main …
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sulphide ores, gold may occur in several of the above forms, which affects flotation recovery. During flotation of gold-bearing massive sulphide ores, the emphasis is generally placed ... 17.5 FLOTATION OF GOLD-CONTAINING MERCURY/ANTIMONY ORES In general, these ores belong to a group of difficult-to-treat ores, where cyanidation usually ...
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The Sb ores from Banxi and Muli are mainly antimony sulfide, and the Sb ore from Tongkeng is a polymetallic sulfide ore. The rock deposit types of Banxi, Muli and Tongkeng Antimony Mine are quartz vein, carbonatite sedimentary-modified and stratoid integrated Sb-plumbum sulfosalt deposits, respectively ( Wu, 1993 ).
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A two-stage roasting process, similar to that used for arsenic sulfide ores, can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony, which can coat the surface of gold particles (Nagy et al., 1966) or the formation of silver glasses in high-silver ores (Matsukawa et al., 1956).
به خواندن ادامه دهیدINTRODUCTION. Antimony (Sb) (atomic number 51; atomic mass 121.75 g/mol; density 6.684 g/cm 3; melting point 631°C) occurs naturally as a sulphide ore, stibnite (Sb 2 S 3) and valentinite (Sb 2 0 3).The traditional method of treating the ore is to roast it with charcoal or coke and collect the volatile oxide fume (Sb 4 O 6) from which pure antimony is refined.[]
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Stibnite. Stibnite is a sulfide minerals with chemical composition is antimony sulfide (Sb2S3). The principal ore of antimony. Lead-gray to silvery gray in color, it often develops a black, iridescent tarnish on exposure to light. It normally occurs as elongated, prismatic crystals that may be bent or twisted.
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been the dominant method for oxidising sulfide bearing gold ores and concentrates. However, with the cost associated with treating SO 2 gas and the increasing concerns over ... mercury and antimony. These studies showed that almost of the gold could be selectively recovered using cheap solid materials for adsorption of the gold (Anderson ...
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The method used for the extraction of antimony depends on the grade of the ore. (a) Antimony can be extracted by reacting scrap iron with low-grade ores that contain antimony sulfide (Sb2S3). Deduce one reason why the method of extraction of antimony from a low-grade ore, described in part (a), is a low-cost process.
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Sodium sulfide solutions are effective leaching agents for the concentration of stibnite from ores. Electrolysis of these solutions produces antimony. After further purification of the crude antimony, the metal, called regulus, is cast into cakes. About half of this antimony is used metallurgically, principally in alloys.
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Mineral Resource of the Month: Antimony. by U.S. Geological Survey. Tuesday, June 12, 2018. James F. Carlin Jr., mineral commodity specialist for the U.S. Geological Survey, compiled the following information on antimony, an essential industrial metal with a variety of uses. Stibnite is the most common mineral form of antimony sulfide.
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The blast furnace is generally used for mixed sulfide and oxide ores, and for oxidized ores containing up to about 40% antimony; direct reduction is used for rich oxide ores. Some antimony ores are treated by leaching and electrowinning to recover the antimony. The concentrates may be leached directly or converted into a complex matte first ...
به خواندن ادامه دهیدAntimony Metallurgy. Antimony metallurgy is the technology that extracts antimony metal from antimony ores or produces antimony compounds. Antimony was discovered in the ancient time, and its name was derived from antimonite. In 1604, a process was invented to extract antimony and antimony sulfide as described by B. Valentine of …
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