antimony ore roasting

The removal of the excess sulphur contained in sulphide ores by heating in an excess of air is called roasting. The concentrated sulphide ore is heated in reverberatory furnace, below its melting point or fusion temperature in the presence of an excess of air with or without the addition of an external substance.

Feedstocks containing 5–25% antimony are volatized by roasting at ~ 1000 °C; this treatment removes sulfur as SO 2 off-gas and antimony trioxide, Sb 2 O 3, is retrieved as flue dust which can then be reduced to antimony metal in reverberatory furnaces using carbon as the reductant (Hua et al., 2003, Anderson, 2012, Qin et al., …

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. 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 ...

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%.

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 …

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 …

Because of the rise in gold prices, some antimony ores should really be viewed as gold ores with antimony as a by-product. In this context, cyanide leaching is …

Volatilization Roasting is the process of volatilizing the sulfur and forming antimony crude oxide (Sb2O3) Sb2S3 +9O→Sb2O3+3 SO2; begins at 290°, rapid at 520° and finishes at 560° (Saito); begins at 290°, if the size of the grain is 0·1 mm. in diameter, at 343° of 0·1 to 0·2 mm., and 430° if 0·2 mm. (Friedrich); commences at 190 ...

The melting point of antimony compounds, generated in the roasting process of antimonial refractory gold ores, is low(the melting point of Sb 2 S 3 and Sb 2 O 3 is 546 and 655 °C, ... Jin SB et al (2009) Influence of antimony on refractory gold ore roasting and cyanide leaching. Gold 30(2):121–128. Google Scholar

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 …

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 …

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 ...

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 …

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 …

In 1884, A. Bobierre and others proposed for the first time the volatilization roasting method for antimony regulus extraction. In 1896, electrolytic antimony was …

These air bubbles then rise to the surface, where they are collected and separated from the rest of the ore. Roasting: The collected antimony concentrate is then roasted at high temperatures. This process helps to remove impurities and convert the antimony sulfide (Sb2S3) into antimony oxide (Sb2O3).

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/

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.

The careful roasting of Bully Hill ore below the formation temperature of ferrates led to 93.6 per cent, zinc extractions, leaving insoluble zinc in the calcines amounting to but 15.7 per cent, of that called for by the iron content and ferrate formula. ... Both arsenic and antimony are volatilized in roasting, but not so completely as to ...

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

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 …

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 …

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 ...

Antimony is often found in other ores as well, e.g., silver, copper, and lead. The pure element antimony is produced from the ore by roasting it to form the oxide, then reducing the oxide with carbon or iron; often a flux of sodium sulfate or sodium carbonate is used to prevent loss of molten antimony by evaporation.

THE APPLICATION OF ROASTING PRETREATMENT FOR ANTIMONIAL REFRACTORY GOLD AND SILVER ORES. O Celep1, I Alp2 and H Deveci3. ABSTRACT. The Akoluk …

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 …

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 …

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 ...

The antimony content is quite high, up to seven percent, under the form of various antimony oxides and native antimony. In the Brioude-Massiac area, France, antimony has been heavily mined at the end of the nineteenth century, giving rise to the generation of large amounts of wastes from the metallurgy of the ores.

Description. Synthetic antimony trioxide, produced by roasting Antimony ore then mixing with Barium sulfate, was introduced as an artists' pigment called antimony white in 1920.Antinomy white was sold under the name Timonox.It is inert, has good hiding power and low oil absorption.

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 ...

Consider pyrometallurgy of antimony. The antimony ores (containing Sb 2 S 3 ), when heated in the air, are oxidized into volatile Sb 2 O 3. The reaction process is as …

The antimony, on the other hand, remained in the residue in the form of trioxide. Leaching was performed at I50°C and an oxygen partial pressure of 10 bar. The other conditions were solid concentration of 200 g/l and ammonia concentration of 15%. The prerequisite for this leaching is the mechanical activation of the ore in a vibration mill.

Thus, about 94 percent of the mercury was recovered by the combined flotation-roasting treatment of cinnabar- stibnite ore. Studies to develop a process for obtaining a marketable antimony by- product from the fluidized-bed calcine is the second phase of this investigation and will be the subject of another paper.

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 …

Morphology and EDS of roasted gold ore (wet pellet, water 180 kg/ton ore, without NaClO 3, microwave power 700 W and roasting time 30 min). ... It is used to remove materials such as sulphur 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 …

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 ...