The leaching parameters were 800 ppm NaCN, DO 16 ppm and pH 10.5 for a duration of 120 hours. The associated cyanide consumption was 4.0 kg/t. Gold leaching was not sensitive to cyanide concentration.
The volatilization of stibnite (Sb2S3) in nitrogen from 700 to 1000 °C was investigated by using thermogravimetric analysis. ... The leaching of Sb corresponds to diffusion-controlled model at ...
In the stibnite leaching work, Meza-Saucedo (1986) attributes the diffusion control to ionic diffusion in the liquid phase. Gudyanga et al. (1998) proposed the un …
Kinetics of leaching of stibnite by mixed Na2S and NaOH solutions. Pavel Raschman. 2012, Hydrometallurgy. See Full PDF Download PDF. See Full PDF ...
Stibnite solubility increases at an increasing rate with rising Na2S concentration, and the reaction that best fits the experimental data is 2Sb2S3 + HS- + OH-= Sb4S72- + H2O, for which an equilibrium constant was estimated to be about 5.0. The solubility of stibnite ( Sb2S3) was measured at 25 C and 1 atmosphere in solutions ranging from 0.45 to 7.16 …
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.
1966. TLDR. Stibnite solubility increases at an increasing rate with rising Na2S concentration, and the reaction that best fits the experimental data is 2Sb2S3 + HS- + OH-= Sb4S72- + H2O, for which an equilibrium constant was estimated to be about 5.0.
Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH - Na2S solution were carried out. Antimony recovery in NaOH leaching was lower than that with ...
The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) concentrate assaying 64.86%. A hydrometallurgical process was developed for the preparation of commercial grade antimony trioxide (Sb2O3) from indigenous antimony ore. The developed process includes oxidative chlorination leaching of stibnite (Sb2S3) …
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 ...
The calculated values of the kinetic parameters indicate that the leaching process is controlled by both the intrinsic chemical reaction between Sb2S3 and Na2S at the liquid/solid interface and ...
Chemical Formula: Sb2S3. Chemical Composition: Stibnite is composed of two elements, antimony (Sb) and sulfur (S). It consists of approximately 71.4% antimony and 28.6% sulfur by weight. Physical …
This paper is concerned with the kinetics of stibnite (Sb2S3) dissolution in H2SO4-NaCl-Fe(SO4)1.5-O2 solutions. ... During the leaching stage, stibnite reacts with sodium sulfide to form sodium ...
DOI: 10.7185/gold2023.20321 Corpus ID: 266296428; Antimony release and isotope fractionation during leaching of stibnite (Sb2S3): An experimental study …
Antimony sulfide (Sb2S3, stibnite) is a semiconductor nanomaterial with orthorhombic crystal structure [1, 2]. ... All detailed processes, include: the hydrochloric acid leaching, purification and deoxidization, solvent extraction of bismuth, lime roasting process, leaching and solvent extraction of molybdenum, were then optimized for selective ...
A hydrometallurgical process was developed for the preparation of commercial grade antimony trioxide (Sb2O3) from indigenous antimony ore. 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 …
Enhancement Mechanism of Stibnite Dissolution Mediated by Acidithiobacillus ferrooxidans under Extremely Acidic Condition. Oxidative dissolution of stibnite (Sb2S3), one of the most prevalent geochemical processes for antimony (Sb) release, can be promoted by Sb-oxidizing microbes, which were studied under alkaline …
Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH - Na2S solution were carried out. Antimony recovery in NaOH leaching was lower than that with ...
The kinetics of oxidative dissolution of natural stibnite (Sb 2 S 3) under environmentally relevant conditions is investigated.The effects of hydrogen ion activity (pH 1.08–10.63), dissolved oxygen saturation (p(O 2) from 0 to 80% of atmospheric pressure), and temperature (25–48 °C) on the reaction rate were studied using a mixed flow …
Antimony (Sb) is obtained by heating pulverized stibnite (Sb2S3) with scrap iron and drawing off the molter antimony from the bottom of the reaction vessel. Suppose that 6 kg of stibnite and 2.5 kg of iron turnings are heated together to produce 2 kg of Sb metal. MW of Sb2S3, Fe, and Sb are 339.7, 55.85, and 121.8 respectively.
Experimental work on the oxidation of stibnite (Sb2S3) was carried out at temperatures between 350 and 500°C and oxygen partial pressures between 1.01 and 21.28 kPa by using a thermogravimetric analysis method. The oxidation rate of stibnite was significantly influenced by both temperature and partial pressure of oxygen. Stibnite oxidized in one …
Reductive leaching of stibnite (Sb2S3) flo- tation concentrate using metallic iron in a hydrochloric acid medium II: kinetics. Hy- O3 þ Cl− þ Hþ ¼ HClO þ O2 ð8Þ drometallurgy 88, 132–142. ...
Laboratory leaching tests of natural stibnite (containing Sb2S3, SiO2, ZnS and FeS2) with NaOH or NaOH – Na2S solution were carried out. Antimony recovery in NaOH leaching was lower than that with Na2S – NaOH solutions (1:1). A decrease in particle size led to higher antimony recovery.
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 …
This work aims to shed light on the leaching kinetics of antimony from stibnite ore in potassium hydroxide (KOH) solution. Response surface methodology …
The crushed natural stibnite (Sb 2 S 3) single-crystal sample was loaded in between two diamond anvils of 400 μm culet size and was sealed with a T301 steel gasket. The sample chamber was a ...
Kinetics of leaching of stibnite by mixed Na2S and NaOH solutions. pavel raschman. 2012, Hydrometallurgy. See Full PDF Download PDF. See Full PDF ...
This paper is concerned with the kinetics of stibnite (Sb2S3) dissolution in H2SO4-NaCl-Fe(SO4)1.5-O2 solutions. ... During the leaching stage, stibnite reacts …
