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US5451247A - Process for removing tin, arsenic and ...

The process as claimed in claim 6, wherein the removal of tin, arsenic and antimony takes place in a separate reaction vessel from which the reaction products floating on the surface of the molten lead are taken off by controlling the lead level.

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Determination of arsenic, antimony, and tin in lead-, tin ...

The following procedure is designed for the determination of arsenic, antimony, and tin in tin-antimony alloys which contain little or no lead. The sample taken should not contain more than 100 mg of antimony or 200 mg of tin. When only antimony is to be determined, the .

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Lead smelting - Wikipedia

This process also keeps the lead from oxidizing. The molten lead flows from the blast furnace into holding pots. Lead may be mixed with alloys, including antimony, tin, arsenic, copper and nickel. It is then cast into ingots. Lead exposure. Humans have been smelting lead for thousands of years, poisoning themselves in the process.

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Extraction of Antimony - Element Antimony, Sb, Metalloid

For the treatment of lead-antimony alloys the Harris process is largely employed in England and some other countries. In this process the scrap metal is melted with an oxidising alkaline flux. Arsenic, antimony and tin are then removed by skimming as sodium arsenate, antimonate and stannate.

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The exposure to and health effects of antimony

Antimony and glass workers. Heavy metals have been shown to alter the mechanism and release of lysosomal enzymes. The activities of lysosomal glycohydrolases were determined in order to evaluate the asymptomatic toxic effects of low levels of exposure to arsenic and antimony in art glass workers by a fluorimetric assay.

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Refractory Gold Ore Treatment Methods

Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and .

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Investigation of Influencing Factors and Mechanism of ...

Exposure to antimony (Sb) and arsenic (As) through contaminated surface water poses a great threat to human health. In this work, Sb and As were removed simultaneously by electrocoagulation (EC) using Fe–Al electrodes. The effects of current density, pH, initial concentration, aeration intensity, and anions were investigated. A higher current density achieved better removal performance.

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Antimony trioxide - Wikipedia

Antimony(III) oxide has suspected carcinogenic potential for humans. Its TLV is 0.5 mg/m 3, as for most antimony compounds. No other human health hazards were identified for antimony(III) oxide, and no risks to human health and the environment were identified from the production and use of antimony trioxide in daily life.

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THE ALKALINE SULFIDE HYDROMETALLURGICAL .

process will be given in future publications and may be illustrated as follows: Na2SO4 + 2H2O H2SO4 + 2NaOH (15) 2.3 Alkaline Sulfide Hydrometallurgical Treatment of Lead Smelter Copper Dross Flue Dust The formation of arsenic and antimony laden dusts in the processing of lead is commonly encountered.

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Process for removing tin, arsenic and antimony from molten ...

The invention relates to a process for removing tin, arsenic and antimony from molten lead by means of oxygen or oxygen-containing gas mixtures, which is or are blown into the molten lead by means of at least one gas nozzle (2). To avoid damage to the gas nozzle, at least the oxygen outlet region (13) thereof, located in the molten lead (6), is enveloped by an inert gas.

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Antimony trioxide - Wikipedia

Oxidation of antimony metal. Antimony metal is oxidized to antimony(III) oxide in furnaces. The reaction is exothermic. Antimony(III) oxide is formed through sublimation and recovered in bag filters. The size of the formed particles is controlled by process conditions in furnace and gas flow. The reaction can be schematically described by:

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How Arsenic, Antimony Silver Compounds Affects Leaching

How Arsenic, Antimony Silver Compounds Affects Leaching. (3) Pyrargyrite. 6H + Ag3SbS3 + 6NaOH = 3Na2S + 6H2O + 3Ag + Sb (4) Proustite. 6H + Ag3AsS3 + 6NaOH = 3Na2S + 6H20 + 3Ag + As." "The reactions being reversible, probably the arsenic and antimony are not completely reduced to the metallic state in practice,...

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Antimony, arsenic, phosphorus, and boron autodoping in ...

Lateral autodoping originating from arsenic- or antimony-implanted silicon substrates can be suppressed by reduction of the total pressure during the epitaxial process. In contrast, autodoping is enhanced at reduced pressure if boron-doped buried layers are employed.

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CLU-IN | Contaminants > Arsenic > Treatment Technologies

Treatment Technologies. Arsenic cannot be destroyed in the environment; it can only change its form or become attached to or separated from particles. It may change its form by reacting with oxygen or other molecules present in air, water, or soil, or by the metabolic action of of plants or animals.

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CLU-IN | Contaminants > Arsenic > Treatment Technologies

When the process was implemented at the Susie Mine (Montana), with an emphasis on zinc and arsenic removal, zinc was removed effectively and the level of arsenic fell substantially, but the field system was unable to achieve arsenic levels below 10 µg/L. Owing to numerous process upsets, a shortened schedule with minimal process optimization ...

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Extraction of Antimony - Element Antimony, Sb, Metalloid

The crude product contains 94 to 95 per cent, antimony mixed with iron, sulphur, lead and arsenic. This is refined by melting carefully under a flux of sodium carbonate. After a time the impurities can be skimmed off and then a mixture containing antimony oxide, antimonyl .

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Determination of arsenic, antimony, and tin in lead-, tin ...

The following procedure is designed for the determination of arsenic, antimony, and tin in tin-antimony alloys which contain little or no lead. The sample taken should not contain more than 100 mg of antimony or 200 mg of tin. When only antimony is to be determined, the .

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Arsenic - Wikipedia

Arsenic is a common n-type dopant in semiconductor electronic devices, and the optoelectronic compound gallium arsenide is the second most commonly used semiconductor after doped silicon. Arsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides, and insecticides. These applications are declining due to the toxicity of arsenic .

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Antimony - Wikipedia

Oxyhalides are more common for antimony than for arsenic and phosphorus. Antimony trioxide dissolves in concentrated acid to form oxoantimonyl compounds such as SbOCl and (SbO) 2 SO 4.: 764. Antimonides, hydrides, and organoantimony compounds. Compounds in this class generally are described as derivatives of Sb 3−. Antimony forms antimonides with metals, such as indium .

Pronunciation: UK: /ˈæntɪməni/, (AN-tih-mə-nee), US: .Get Price
(PDF) Processing of Antimony at the Sunshine Mine

Abstract. This paper describes the Sunshine antimony processing facility. Specifically, the relevant process chemistries involved in concentrate Ieaching, metal electrowinning, and sodium antimonate production will be discussed. In addition, ongoing areas of research to inmprove unit operations and treatments implemented to meet environmental...

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