The accurate determination of bismuth in lead concentrates and …
Bismuth is a penalty impurity in lead concentrates and a quick and accurate determination in diverse materials at levels from 1 Itg/g (1 ppm) upwards is important in a lead …
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Hydrometallurgical process for extracting bismuth from by …
4 Conclusions (1) A new hydrometallurgical process based on the methanesulfonic acid system can extract bismuth effectively from the by-products (lead alloy bearing high …
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CN1369019A
The present invention focuses on the method for the removal of impurities, such as tellurium and bismuth, from gold concentrate containing sulfides. According to the present method, the impurities are leached from the gold concentrate with the aid of an acidic aqueous solution, at an elevated temperature, whereby the impurities dissolve and the gold remains in the concentrate.
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Efficient Extraction of Bismuth in a Two-Stage Leaching
Under the optimum conditions, the leaching rates of bismuth and lead were 93.5% and 0.24%, respectively. The leachate enriched in bismuth was used to prepare bismuth products, and the leach residue enriched in lead could be further processed to recover lead. ... She X et al (2011) Study on mechanism of Zn, K, Na removal and flue gas formation ...
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Metallic bismuth morphology and microstructure control during the
After impurities removal, the obtained purified solution in the next cycle is sent to the electro-deposition process as electrolyte. ... An efficient technology for smelting low grade bismuth-lead concentrate: oxygen-rich side blow process. JOM, 67 (2015), pp. 1997-2004, 10.1007/s11837-015-1491-8. View in Scopus Google Scholar [14] T.Z. Yang, H ...
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CN113481371A
The invention discloses a method for efficiently recovering antimony, bismuth, copper and silver from silver separating slag of lead anode slime, which relates to the technical field of metal smelting and comprises the following process steps: leaching with hydrochloric acid to obtain silver-rich slag, hydrolyzing to precipitate antimony and bismuth step by step to obtain …
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Clean and Efficient Recovery of Valuable Metals from …
an alkaline smelting process to treat bismuth sulfide concentrate, which utilized the principle that heavy metal sulfides can react with low-melt-ing point alkaline salts at low temperature to realize the extraction of bismuth, lead, tungsten, molybde-num, silver, and other metals from bismuth sulfide concentrate.
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Processes for the Recovery of Bismuth from Ores and …
lead. The bismuth percentage abundance is 9 × 10–7%, ... bismuth concentrate containing 10.59% of copper and ... (pH = 4) to remove calcite and Na 2 S. Bismuth is further leached with 3% ...
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Selective Separation of Arsenic from Lead Smelter Flue Dust by …
This study investigated the feasibility of using an alkaline pressure oxidative leaching process to treat lead smelter flue dust containing extremely high levels of arsenic with the aim of achieving the selective separation of arsenic. The effects of different parameters including NaOH concentration, oxygen partial pressure, liquid-to-solid ratio, temperature, and …
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Selective leaching and recovery of bismuth as Bi2O3 from copper …
The reason for this penalty is that, bismuth is known to interfere with the recovery of silver values and also alter the physical properties of the metallic lead with respect to its ductility [9]. So, the limitation of Bi content in refined lead is limited to 50–100 ppm [10]. Therefore, such residues must be sold elsewhere at less than the ...
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A review of copper–arsenic mineral removal from copper concentrates
The onus is to move back to concentrate producers to remove toxic elements, such as arsenic, earlier in the concentrate supply chain. The common copper–arsenic bearing minerals in copper ores, enargite (Cu 3 AsS 4 ) and tennantite (Cu 12 As 4 S 13 ), contain significant amounts of copper; 48.4% and 51.6% respectively.
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Lead Concentrate
See more Lead products. Lead (atomic symbol: Pb, atomic number: 82) is a Block P, Group 14, Period 6 element with an atomic radius of 207.2. The number of electrons in each of Lead's shells is [2, 8, 18, 32, 18, 4] and its electron configuration is [Xe] 4f 14 5d 10 6s 2 6p 2.The lead atom has a radius of 175 pm and a Van der Waals radius of 202 pm.
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US1853534A
the process of'refining lead for the re moval of bismuth.wvhich comprises melting said lead to form a bath, addin calcium to said bath and stirring for a su cient period of time to form an intimate mixture, removing the dross and cooling the kettle to form blocks and rims which are removed and treated for the recovery of the metal therefrom, reheating said bath, adding chlorine to said …
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Selective Pre-leaching of Tellurium From Telluride …
A large number of flotation experiments were carried out on bismuth tellurium deposits and the tellurium grade and recovery rate of obtained concentrate products are 9.94 and 94.81%, respectively (Yu et al., 2019). This …
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Bismuth Dissolution at Smelter
Selective bismuth removal from lead cake is demonstrated by the previous results in which optimum conditions of 70°C, 1M H2SO4 and 0.1M NaCl resulted in 86.33% bismuth removal and a recovery of 99.65% silver in the …
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WO2001012865A1
The gold concentrate was leached for the removal of bismuth and tellurium at different NaCI-concentrations and NaCI and sulfuric acid combinations at a pH value of 1 and at a temperature of 60 °C, according to tests 1-4, and at room temperature (25° C), …
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Method of removal of impurities from gold concentrate containing
The present invention focuses on the method for the removal of impurities, such as tellurium and bismuth, from gold concentrate containing sulfides. According to the present method, the impurities are leached from the gold concentrate with the aid of an acidic aqueous solution, at an elevated temperature, whereby the impurities dissolve and the ...
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Lead-Bismuth Flotation
There are several methods for lead-copper separation. But, perhaps, the more common is employing NaCN as depressant for chalcopyrite, and also use a collector for improving bismuth flotation. The collector can be …
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Antimony Recovery from End-of-Life Products and Industrial …
The lead concentrate is then fed into a blast furnace together with limestone (flux) and coke in order to reduce the oxides ... Mallaley K, Morris DR (1990) Analysis of the Kroll-Betterton process—the removal of bismuth from lead bullion. Can Metal Q 29:67–71. Article CAS Google Scholar Brecka G, Hein K, Lange HJ, Paschen P (1997) A ...
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TACKLING IMPURITIES IN COPPER CONCENTRATES
The bismuth-bearing sulphosalts in the mid-grade concentrate all appeared to contain lead and were identified as cosalite (Pb 2 BiS 5), aikinite (PbCuBiS 3) and proudite (Cu 0-1,Pb 7.5 (Bi) 9.3-9.7 (S,Se) 22). In contrast, the high-grade concentrate had no bismuthinite and had most of its bismuth tied up in the Bi-Pb
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Clean and Efficient Recovery of Valuable Metals from Bismuth …
The traditional bismuth sulfide concentrate smelting process had the problems of low direct recovery rate of metallic bismuth, low extraction rate of associated valuable metal elements, and SO2 ...
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Extraction and separation of zinc, lead, silver, and bismuth from
Hydrometallurgical processing of lead-bearing materials for the recovery of lead and silver as lead concentrate and lead metal. Hydrometallurgy, 58, 103–116. SARKAR, S.G., DHADKE, P.M., 1999. Solvent extraction separation of antimony(III) and bismuth(III) with bis (2,4,4-trimethylpentyl) monothiophosphinic acid (Cyanex 302). Sep. Purif.
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A process for debismuthizing lead with magnesium
Significant amounts of bismuth can be removed from magnesium-lead alloys by crystallization of the intermetallic compounds Mg0.6573Pb0.3427 and Mg0662Pb0.338 in the …
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Processes for the recovery of bismuth from ores and …
Some data on the bismuth recovery technologies in the production of copper and the processing of copper-bismuth and tungsten-molybdenum …
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Experimental Study on Bismuth Removal from Lead with Auxiliary …
The separation of lead from the impurity bismuth remains a significant challenge, with achieving effective separation being a critical bottleneck in the production of high-purity …
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Reaction kinetics of bismuth dissolution from lead cake by …
however, due to penalties imposed for bismuth content by some lead smelters. Indeed, some lead smelters, require feed material containing less than 0.02% bismuth. Research was initiated to investigate details of the sulfuric acid leach to determine if bismuth could be removed from the lead cake selectively with
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12.6 Primary Lead Smelting
The processing of lead concentrate into metallurgical lead involves 3 major steps: sintering, reduction, and refining. A diagram of a typical facility, with particle and gaseous emission sources ... vacuum removal of zinc; (4) removal of bismuth by the Betterson Process, in which calcium and magnesium are added to form an insoluble compound
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Removal of impurities from bismuth pickling solution using solvent
This work proposes an extraction process for thorough removal of various impurities in crude bismuth.In the process, crude bismuth was pickled with nitric acid, and then the bismuth in the filtrate was extracted into the organic phase by TBP.After scrubbing with a saturated NaNO 3 solution, stripping was carried out by NaOH solution, and a rod-shaped α-Bi 2 O 3 …
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Removal of arsenic, lead and bismuth from copper anode slime …
The use of copper anode slime (CAS) for the removal of lead, bismuth, and arsenic is the key to recovering precious metals. ... A lead concentrate with lead grade of 57.2% was eventually obtained ...
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Bismuth Metallurgy
The raw materials processed with the method are mainly composed of bismuth lead sulfide concentrate and other bismuth-containing raw materials. ... chlorination for zinc and lead removal, final refining, and ingot casting (Fig. 1). The process arrangement of crude bismuth fire refining depends on the raw material composition of crude bismuth ...
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