Background

stibnite sb s leaching

Antimony Leaching from Stibnite and Complex Ores*

ANTIMONY LEACHING FROM STIBNITE AND COMPLEX ORES1 Y.T. John Kwong2, Allen Pratt2 and Gianluigi Botton2 Abstract. To shed light on the leaching of Sb from mine wastes containing stibnite, two series of experiments were conducted. In one experiment, polished slabs of a museum-grade stibnite and a mixed-sulfide ore sample containing 28% Sb were

Investigation of Alkaline Leaching Parameters on Stibnite ...

Excess NaOH and Na 2 S were used, and the minimum molar ratio of Na 2 S:Sb 2 S 3 was 18:6. The rate-controlling step was identified as the leaching reaction at the stibnite particle surface. In all experiments, a surplus of leaching solution consisting of …

Leaching of Antimony from Stibnite Ore in KOH Solution for ...

Vegilo et al.16 have previously used response surface methodology (RSM) for designing experiments, and as a modeling and optimizing tool, to determine the optimal condition for the dissolution of Sb. Their results indicated that using 1 g Na 2 S and 1 g NaOH per g of pure stibnite can provide an antimony leaching efficiency up to 98–. Ubaldini et al.17 developed a new process for the ...

LEACHING OF STIBNITE IN NaOH SOLUTIONS

its effect on leaching in mixed Na2S + NaOH solution. KEYWORDS: antimony, alkaline leaching, stibnite, recovery 1. INTRODUCTION At the first stage of hydrometallurgical processing of stibnite (Sb2S3), i. e. its leaching, the following acidic leaching media are commonly applied: mixture of

BEHAVIOUR OF STIBNITE IN ALKALINE LEACHING

Leaching of natural stibnite (Sb2S3) that occurs together with other minerals such as quartz (SiO2), pyrite (FeS2) and wurtzite (ZnS) is a very important unit operation in which antimony passes into the leaching solution. Leaching is controlled by thermodynamic and kinetic aspects. From the

LEACHING OFSTIBNITEBYMIXEDNa2SANDNaOHSOLUTIONS

Sb2S3 + 6NaOH = Na3SbS3 + Na3SbO3 + 3H2O (2) Reactions (1) and (2) describe the process of Sb2S3 leaching in alkaline solutions [13]. The resulting leaching solution is a complex system containing various species (Sb, S, Na), which upon reaction with

Reductive leaching of stibnite (Sb2S3) flotation ...

The reductive decomposition of a stibnite (Sb 2 S 3) flotation concentrate using elemental iron was investigated in hydrochloric acid.The leaching process which proceeded via both reductive and non-oxidative chemical decomposition reactions achieved desulphurisation in excess of 95% to produce elemental and dissolved antimony species, ferrous ions and hydrogen sulphide gas.

(PDF) Leaching of stibnite in NaOH solutions

This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb 2 S 3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this ...

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, under the following optimum conditions ...

Optimisation of Pure Stibnite Leaching Conditions by ...

leaching agents can be used to solubilise Sb from stibnite ores (Sb2S3): mixture of hydrochloric and tartaric acids, mixture of nitric and tartaric acid and hot concentrated sulphuric acid (Havlik et al., 1991; Ubaldini et al., 2000b). Stibnite can be leached by alkaline solutions of Na2S and NaOH (Ubaldini et …

Investigation of Alkaline Leaching Parameters on Stibnite ...

12%Excess NaOH and Na 2 S were used, and the minimum molar ratio of Na 2 S:Sb 2 S 3 was 18:6. The rate-controlling step was identified as the leaching reaction at the stibnite particle surface. In all experiments, a surplus of leaching solution consisting of higher molar ratios of caustic to antimony was added.

Oxidative Chlorination Leaching of Stibnite Using Acidic ...

chlorination leaching of stibnite (Sb 2 S 3) concentrate assaying 64.86% Sb prepared from indigenous low-grade ore containing 20.16% Sb using ferric chloride (FeCl 3) solution in acidic medium as lixiviant followed by purification, precipitation and crystallization of antimony trioxide as end product. An effort was made to investigate the ...

flotation concentrate sb s

Reductive leaching of stibnite (Sb2S3) flotation. Flotation concentrate and reagentsThe stibnite flotation concentrate sample from Tiger Reef Mine, Zimbabwe, contained about 70% Sb 2 S 3 with relatively small amounts of pyrite (1.4%), arsenopyrite (1.8%) and chalcopyrite (0.4%).

(PDF) Effect of selected parameters on stibnite ...

Effect of selected parameters on stibnite concentrates leaching by ozone. Download. Related Papers. Ozonation leaching of a complex sulfidic antimony ore in hydrochloric acid solution. By Pedro Daniel Chambi Chino. Manganese metallurgy review. Part …

(PDF) Leaching of Natural Stibnite using Sodium Hydroxide ...

This paper presents the results of the laboratory investigation of alkaline leaching of stibnite (Sb 2 S 3) sample, which originated from Pezinok (Slovakia) mine. The leaching media used in this ...