Separation of arsenic and antimony from dust with high …
As mentioned above, the selective sulfidation roasting of the dust with high content of arsenic and antimony should be performed with a small sulfur amount at a low temperature to obtain a maximum separation rate between arsenic and antimony. 3.2 Effect of roasting temperature In order to investigate the effect of roasting temperature …
Antimony Metallurgy | SpringerLink
In 1884, A. Bobierre and others proposed for the first time the volatilization roasting method for antimony regulus extraction. In 1896, electrolytic antimony was …
Roasting in Metallurgy
Roasting in Metallurgy. In metallurgy, the operation of roasting, as a preliminary to chlorination, has for its object the expulsion of the sulphur, arsenic, antimony and other volatile substances existing in …
A selective process for extracting antimony from …
The process included three steps: 1) leaching of antimony from the refractory gold ore with sodium sulfide solution; 2) pressure oxidation of the leaching solution …
Antimony revisited | Feature | RSC Education
Evidence for the occurrence of antimony can be traced back to antiquity. 1 The name comes from the Greek, anti and monos, meaning 'metal not found alone'. 2 Indeed, antimony is usually found as the sulfide ore, stibnite, Sb 2 S 3, the black form of which was used by ancient Egyptian women as a cosmetic for darkening their eyebrows …
Roasting Solutions
roasting is used to remove almost all unwanted elements – such as arsenic and antimony – before further treating the calcine. Special equipment is used for cooling and precipitating arsenic trioxide, which can be produced to a very high purity. Most of our sulfating roasting plants are used for copper/
Calcination or Roasting of Ores
The object of calcining or roasting certain ores before treatment is to dissipate the sulphur or sulphides of arsenic, antimony, lead, etc., which are inimical to treatment, whether by ordinary mercuric amalgamation or lixiviation. The effect of the roasting is first to sublimate and drive off as fumes the sulphur and a proportion of the objectionable metals.
Roasting | SpringerLink
Roasting. Called also calcination, it is the reaction process of solid materials such as ore, concentrate, or metal compound without melting at a high temperature. It is used in chemical or metallurgical production to obtain chemical constituents required for the next process of either smelting or leaching. It can also be seen as a process of ...
A selective process for extracting antimony from refractory gold ore
A complete technological process for extracting antimony from refractory gold ore was proposed. ... 2005). During the two-stage roasting pretreatment process, it is easy to fuse with each other due to the low melting points of antimony compounds, causing the gold particles to be encapsulated again (Cui et al., 2011). In pressure oxidation ...
Direct preparation of micro and nano antimony trioxide using antimony …
The mechanism of roasting antimony sulfide ore via microwave oxidation was analyzed, which provided a theoretical basis for the clean utilization of antimony sulfide ore under microwaves. Section snippets Materials. The antimony sulfide ore used in this study was obtained from Hunan province (China) after passing through a 100 …
Beneficiation of antimony oxide ore: A review
Antimony oxide ore beneficiation has become one of the world's largest mineral processing conundrums. In recent years, many experimental studies dealing with antimony oxide ore have been carried out, resulting in new technical achievements. Much attention has been paid to improving the mineral processing technology of antimony …
(PDF) Direct preparation of micro and nano antimony …
the oxidation of antimony sul de ore via microwave oxidation roasting was determined using resonant cavity perturbation, and its variation law and the heating characteristics of antimony sul de ...
Thermodynamic and kinetics analysis of the sulfur-fixed …
ore, is also volatile at high temperature causing environment hazardous. Hydrometallurgical process, including the acidity and alkaline methods and consisting of a two steps of leaching and electrodeposition, can be used for both simple and complex antimony ore. In practice, NaOH-Na 2 S [10] and FeCl 3 /SbCl 5-HCl [11] were the main
Refractory Gold Ore Treatment Methods
Furthermore, unless temperature control is very exact, the ore being roasted is liable to be fused into a solid mass, entirely hopeless as regards subsequent roasting or treatment. Provided the roasting is …
Direct preparation of micro and nano antimony trioxide using antimony …
The mechanism of roasting antimony sulfide ore via microwave oxidation was analyzed, which provided a theoretical basis for the clean utilization of antimony sulfide ore under microwaves. 2. Experimental2.1. Materials. The antimony sulfide ore used in this study was obtained from Hunan province (China) after passing through a 100 …
Main producers of antimony in the world.
Antimony is classified as a critical/strategic metal. Its primary production is predominated by China via pyrometallurgical routes such as volatilization roasting—reduction smelting or direct ...
ROASTING OF SULFIDE MINERALS
ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Sulfides are not reduced with the most widely used redu-cing agents, carbon and hydrogen, because the free energy change for the ...
Direct preparation of micro and nano antimony …
The optimal conditions of oxidation roasting of antimony sulfide ore under microwaves are a temperature of 400 °C, duration of 45 min, and an air flow of 0.8 m 3 …
A Review on Pyrometallurgical Extraction of …
Antimony is classified as a critical/strategic metal. Its primary production is predominated by China via pyrometallurgical routes such as volatilization roasting—reduction smelting or direct reduction …
Roasting Arsenic & Antimony Ores
Roasting Arsenic & Antimony Ores. The difficulty of roasting arsenical and antimonial ores may be avoided by taking ore, 1 A.T. ; red lead, 1,000 grains; sodium carbonate, 500 grains; potassium ferrocyanide, 550 grains, with a cover of salt or …
Recovery of gold from sulfide refractory gold ore: Oxidation roasting …
Roasting of refractory gold ore with a composition of 180 kg NaClO 3 and 180 kg water/ton ore reached a temperature of 470 °C at a microwave power of 400 watts for 30 minutes. Total oxidized sulfur reached 90.6%, while only 10.4 % of the sulfur was released, and chlorine release was 49.5%.
THE APPLICATION OF ROASTING …
THE APPLICATION OF ROASTING PRETREATMENT FOR ANTIMONIAL REFRACTORY GOLD AND SILVER ORES. O Celep1, I Alp2 and H Deveci3. ABSTRACT. The Akoluk …
An acidic pressure oxidation pre-treatment of refractory gold
To avoid the adverse effects of antimony on the cyanide leaching process used for the recovery of gold from refractory gold ore, a cleaner production process was proposed that would selectively remove antimony as sodium pyroantimonate. ... Simultaneous extraction of gold and zinc from refractory carbonaceous gold ore by …
Gold Ore Roasting Techniques
Silver ores containing the values as polybasite, stephanite, pyrargyrite (the antimony sulphide), and proustite (arsenic sulphide) usually require roasting. Tetrahedrite is often refractory even after roasting. Argentite (the silver sulphide) and cerargyrite (the chloride) can frequently be cyanided without roasting. ... The ore is roasted to ...
Amalgamation Of Gold Ores & Chloritizing Roasting
The roasted ore is in the most favorable condition for subsequent treatment. 3rd. The fine ore-particles accumulating in the dust-chambers are thoroughly roasted. ... It contains nearly all its silver as a fahl-ore, rich in antimony and arsenic, and carries a large percentage of zinc- blende. In conducting the process in the Howell furnace ...
Zinc Metallurgy | SpringerLink
Arsenic trioxide, antimony powder (antimonic salt), or lead-antimony containing alloy zinc powder is added as activator. Electrodeposition. ... Zinc roasted ore flash reduction: this process consists of three basic steps: complete oxidation roasting of zinc sulfide concentrate in fluidized bed furnace, reduction smelting of zinc oxide roasted ...
Process mineralogy characteristics of acid leaching residue
To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis. The results showed that …
Beneficiation of Antimony Oxide Ore: A Review
Anti-mony oxide ore is typically formed through oxidation of sulfide ore. Sulfide ore is usually oxidized to sulfates of antimony, but given that these sulfates are unstable, they …
Trivalent and Pentavalent Antimony
Volatilization roasting of typically antimony(III) stibnite ores with charcoal or coke at temperatures over 1000 °C, a dominant process for 5–25% antimony ore/concentrates (Anderson, 2012), results in direct recovery of antimony oxides from the produced vapour phase. The production of antimony ...
Antimony Recovery from End-of-Life Products and Industrial …
Antimony has become an increasingly critical element in recent years, due to a surge in industrial demand and the Chinese domination of primary production. Antimony is produced from stibnite ore (Sb2O3) which is processed into antimony metal and antimony oxide (Sb2O3). The industrial importance of antimony is mainly derived from …