Minerals | Free Full-Text | Mechanism and Kinetics of Stibnite
This paper is concerned with the kinetics of stibnite (Sb2S3) dissolution in H2SO4-NaCl-Fe(SO4)1.5-O2 solutions. The experimental results of our study showed a positive effect from ferric ions on stibnite dissolution of up to 0.05 M. An increase in H2SO4 concentration from 0.8 to 3 M and NaCl concentration from 0 to 3 M NaCl improved the stibnite dissolution. …
LEACHING OF STIBNITE–THERMODYNAMIC
phase analysis of the natural ore were published earlier [1, 2]. Antimony, due to its amphoteric nature, may be extracted from its compounds by either acidic or alkaline solvents [3]. The …
A fundamental study of the alkaline sulfide leaching …
where r is the leaching rate (mol/m2s), M is the atomic mass of gold (196.97g/mol), A is the area of the gold electrode (m2), and t is the time elapsed (s). Thus, the slope of the kinetic plot is a measure of the leaching rate. It can be seen from Figure 1 that the gold/silver leach rate increases as a function of time,
How to Process Gold Ores by Heap Leaching & Carbon …
Leaching is continued until no further significant amount of gold is extracted from the ore. Pilot-scale heap-leach tests may be conducted on a tonnage scale if it is desirable to confirm results obtained in laboratory column-percolation tests, or to further quantify reagent requirements (fig. 2).
Leaching of natural stibnite using sodium hydroxide solution
This paper presents the results of a laboratory investigation of alkaline leaching of stibnite sample, which originated from Pezinok (Slovakia) mine. The leaching media used was aqueous solution containing sodium hydroxide. This research focused on establishing the effect of the following parameters on alkaline leaching: NaOH concentration, temperature of leaching, …
Ferric chloride leaching of antimony from stibnite
A circulatory hydrometallurgical process: ferric trichloride (FeCl 3) leaching of antimony sulfide (Sb 2 S 3) (production of Sb by replacing it with iron) followed by membrane electrowinning of ferrous chloride (FeCl 2), was developed to cleanly extract Sb from stibnite.First, Sb was leached (leaching efficiency >98%), using FeCl 3 as leaching reagent, …
Process flow-sheet for gold and antimony recovery from stibnite
DOI: 10.1016/S0304-386X(00)00107-9 Corpus ID: 98163036; Process flow-sheet for gold and antimony recovery from stibnite @article{Ubaldini2000ProcessFF, title={Process flow-sheet for gold and antimony recovery from stibnite}, author={Stefano Ubaldini and Franc Vegli{`o} and Pietro Fornari and Carlo Abbruzzese}, journal={Hydrometallurgy}, year={2000}, …
Oxidative chlorination leaching of stibnite using acidic ferric
The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric chloride ...
Process flow-sheet for gold and antimony recovery from stibnite
Different leaching agents can be used for treatment of stibnite (Sb 2 S 3) ore: mixture of hydrochloric and tartaric acids, mixture of nitric and tartaric acid and hot concentrated sulfuric acid [4]. Sb 2 S 3 can be dissolved also by alkaline solutions, which consists of sodium sulfide (Na 2 S) and sodium hydroxide (NaOH) [2], [5]. The ...
Weathering-induced Sb isotope fractionation during …
The observations in the field settings are supported by laboratory stibnite leaching experiments with various acids for which Sb concentrations and isotopic compositions of the released Sb …
Process flow-sheet for gold and antimony …
As an alternative, chemical leaching can be applied to liberate the gold particles from the sulfur matrix. ... 18r04r72. w4x L.H. Madkour, I.A. Salem, Electrolytic recovery of antimony from natural stibnite ore, Hydrometallurgy 43 Ž1996. …
Leaching of Antimony from Stibnite Ore in KOH Solution for …
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central …
Process Flow-Sheet for Gold and Antimony Recovery from …
Leaching of Sb 2 S 3 ore in an alkaline system involves the combination of sodium sulphide (Na 2 S) and sodium hydroxide (NaOH) to form a solution of sodium thioantimonite …
Extracting antimony from high arsenic and gold-containing …
Chemical analysis of the As-Au-Sb ore (Table 1) indicates that the main valuable metals are antimony and gold. It is clear from the XRD pattern (Fig. 1) that the ore consists of …
Kinetics of leaching of stibnite by mixed Na2S and NaOH …
The kinetics of the reaction between particulate stibnite and mixed Na 2 S + NaOH solutions were studied. The effects of the concentration of the Na 2 S and NaOH (from 0.5% to …
LEACHING OF STIBNITE IN NaOH SOLUTIONS
The chemical composition expressed in weight percents is summarized in Table 1. Other minor elements that are not shown in Table 1 are as follows (weight %): 1.81% Ca, 0.65% Al, 0.37% Mg, 0.115% Cu, 0.015% Hg, ... 3.1 Stibnite leaching in NaOH solution Effect of NaOH concentration in leaching solution on leaching solid sample fraction 0.25mm ...
Investigation of Alkaline Leaching Parameters on Stibnite
This result indicates that the leaching of antimony from the stibnite concentrate includes both diffusion- and chemical reaction-controlled processes verified by the study of …
KINETIC STUDY OF LEACHING STIBNITE IN SODIUM …
The leaching media used in this study were aqueous solutions containing sodium hydroxide. Establishing the effect of the following parameters on alkaline leaching: NaOH concentration, …
Thermodynamic Optimization of Critical Metals Processing …
"Leaching of Antimony from Stibnite Ore in KOH Solution for Sodium Pyroantimonate Production: Systematic Optimization and Kinetic Study" by M. Zekavat, H. Yoozbashizadeh, and A. Khodaei. "High-Efficiency and Oxidant-Free Leaching of Rhenium from Arsenic–Rhenium Filter Cake" by S. Xu, Y. Shen, T. Yu, H. Zhang, H. Cao, and G. Zheng.
Leaching of Antimony from Stibnite Ore in KOH Solution …
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used ...
Leaching of Antimony from Stibnite Ore in KOH Solution …
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology based on central composite design was used to investigate the effect of time, temperature, solid to liquid ratio (S/L), and KOH concentration as independent parameters on the leaching efficiency of antimony. …
SELECTIVE EXTRACTION OF MERCURY AND ANTIMONY …
the ore and would permit possible recovery of antimony from the furnace calcine. Similar treatment is reported tp have been employed successfully on livingstonite ore from Guerrero, Mexico (j5) ./ Results of preliminary hydrometallurgical tests indicated that leaching of cinnabar-stibnite ores or concentrates with sodium sulfide solution is a ...
Process flow-sheet for gold and antimony recovery from stibnite
1.. IntroductionGenerally, extraction and recovery of antimony are realised by pyrometallurgy, which involves the evolution of toxic gases into the atmosphere; several hydrometallurgical methods have been proposed [1], [2], [3].Different leaching agents can be used for treatment of stibnite (Sb 2 S 3) ore: mixture of hydrochloric and tartaric acids, …
KINETIC STUDY OF LEACHING STIBNITE IN SODIUM …
b) choosing of suitable mathematical model of leaching of natural stibnite (Sb2S3) by sodium hydroxide. 2. EXPERIMENTAL . Natural stibnite originating from Pezinok (Slovakia) mine was sampled and subjected to experimental laboratory investigation of leaching process. The chemical composition of the sample in weight percents is summarized in ...
Study on the leaching behavior of antimony in stibnite …
In order to investigate the release process of antimony from stibnite under the leaching effect of rain and snow in Hunan Xikuangshan(XKS) mining area, some important environmental factors are selected: dissolved oxygen, Fe(III) and Pseudomonas sp. AO-1 (referred to as AO-1). The one-factor batch sequence experimental method is adopted to …
Catalytic production of antimonate through alkaline leaching …
Semantic Scholar extracted view of "Catalytic production of antimonate through alkaline leaching of stibnite concentrate" by Özge Gök. ... This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. ... Asia-Pacific Journal of Chemical Engineering.
Investigation of Alkaline Leaching Parameters on Stibnite Concentrate
The calculated values of the kinetic parameters indicate that the leaching process is controlled by both the intrinsic chemical reaction between Sb 2 S 3 and Na 2 S at the liquid/solid interface ...
(PDF) Leaching of stibnite in NaOH solutions
Leaching of Sb 2 S 3 ore in an alkaline system involves the combination of sodium sulphide (Na 2 S) and sodium hydroxide (NaOH) to form a solution of sodium thioantimonite as shown in reactions 1 ...
Cyanide Leaching Chemistry & Gold …
Compare Cyanide VS Thiosulphate gold Leaching. No two ores are exactly alike. Therefore, it is practically impossible to predict how an ore will act during cyanidation, although broad generalizations can sometimes be …
Extracting antimony from high arsenic and gold-containing stibnite ore
This study investigated the leaching and electrowinning of antimony from a complex, high arsenic and gold-containing stibnite concentrate ore (As-Au-Sb ore) using slurry electrolysis (SE). The results indicated that the leaching efficiency of antimony was higher than 98%, and those of iron and arsenic were about 5.50% and 1.14%, respectively.
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