Leaching and Recovering Gold from Antimony Minerals Stibnite (Antimony Sulphide, Sb2S2) This mineral in an ore acts as a weak acid, combining with alkalis to form salts, of the order of M1/3SbS2 and M1/3SbS4 alkaline sulphantimonite and sulphantimonate, especially in the presence of iron sulphides, using high concentrations …
Antimony has been known and used since ancient times, but its applications have increased significantly during the last two centuries. Aside from its few medical applications, it also has industrial applications, acting as a flame retardant and a catalyst. Geologically, native antimony is rare, and it is mostly found in sulfide ores. The main …
Antimony leaching from sulfide ore samples by an experimental consortium of thermoacidophilic microorganisms, including Sulfobacillus, Leptospirillum, and Ferroplasma strains was studied. The ores ...
Estimates of the abundance of antimony in the Earth's crust range from 0.2 to 0.5 parts per million. Antimony is chalcophile, occurring with sulfur and the heavy metals, lead, …
In general the lowest grades of sulfide ores containing 5–25% antimony are volatilized to antimony trioxide: 25–40% antimony ores are smelted in a blast furnace: and 45–60% antimony ores are treated by liquation or iron precipitation. A description of each of these as well as oxide reduction follows (Motoo, 1974, Vladislav, 1981, Yong-Fu ...
The most promising methods for separating antimony and bismuth minerals from sulphide ores are based on pH and/or pulp potential adjustments or the use of starvation levels of collector.
A two-stage roasting process, similar to that used for arsenic sulfide ores, can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony, which can coat the surface of gold particles (Nagy et al., 1966) or the formation of silver glasses in high-silver ores (Matsukawa et al., 1956).
Sulfide ores with antimony contents between 5 and 25% are roasted to give volatile Sb. 2. O. 3. which is reduced directly to the metal. Low-grade and complex ores or ores in which minerals are finely dispersed are beneficiated by flotation (Herbst . et al., 1985). Production/Import Level:
Depending on the concentrations of gold and antimony, different categories of Au-Sb-containing sulfide ores can be distinguished: (1) ores in which gold is the main …
INTRODUCTION. Antimony (Sb) (atomic number 51; atomic mass 121.75 g/mol; density 6.684 g/cm 3; melting point 631°C) occurs naturally as a sulphide ore, stibnite (Sb 2 S 3) and valentinite (Sb 2 0 3).The traditional method of treating the ore is to roast it with charcoal or coke and collect the volatile oxide fume (Sb 4 O 6) from which pure antimony is refined.[]
Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide gold ores (Ubaldini and Vegliò, 2000, Saba ... Process flow-sheet for gold and antimony recovery from stibnite. Hydrometallurgy, 57 (3) (2000), pp. 187-199, 10.1016/S0304-386X(00)00107-9. View …
The method used for the extraction of antimony depends on the grade of the ore. (a) Antimony can be extracted by reacting scrap iron with low-grade ores that contain antimony sulfide (Sb2S3). Deduce one reason why the method of extraction of antimony from a low-grade ore, described in part (a), is a low-cost process.
Sulfide ores with a grade of 5 to 25% are purified and antimony oxide is produced. High-grade ores (45 to 60%) are melted in a blast furnace and solidified under regenerative conditions.
Black antimony sulphide (Anzon) has a strong black colour and is of interest as a pigment in plastics such as PE, polyesters, and PVC. It also confers flame-retardant properties. It …
Arsenic and antimony are environmental pollutants associated with several diseases, including skin cancer. One of the main sources of both elements is the oxidation of sulphide minerals, particularly arsenopyrite and therefore any of both elements is a concern in gold mining operations because arsenic- and antimony-bearing sulphides may …
reasonable and efficient use of antimony oxide ores. Since antimony occurs mainly in elemental form or as stibnite, senarmontite, valentinite or antimony ochre (cervantite and stibiconite) in the Earth's crust, anti-mony sulfide is the main component of global anti-mony mineral resources; thus, it has a high commer-cial value [16].
Geologically, native antimony is rare, and it is mostly found in sulfide ores. The main ore minerals of antimony are antimonite and jamesonite. The extensive mining …
Sodium sulfide solutions are effective leaching agents for the concentration of stibnite from ores. Electrolysis of these solutions produces antimony. After further purification of the crude antimony, the metal, called regulus, is cast into cakes. About half of this antimony is used metallurgically, principally in alloys.
The sulphide minerals are compounds of the metals with sulphur. Nearly all these minerals have a metallic luster, i.e., the peculiar shining appearance of metals, such as gold, silver, copper, lead, tin, iron, etc. ... variable proportions, with copper from 44% to 71%; cleavage, almost absent. Bornite is found mostly with other copper ores ...
1. Background. Antimony is a silvery, white, brittle, crystalline solid that exhibits poor conductivity of electricity and heat. It has an atomic number of 51, an atomic weight of 122 and a density of 6.697 kg/m 3 at 26 °C. Antimony metal, also known as 'regulus', melts at 630 °C and boils at 1380 °C.Antimony and the natural sulfide of …
This seminal paper should usher in a new environmentally sound methodology for extraction of metals from sulfide ores." Hryn adds that although this demonstration used one specific metal, "The primary …
1. Arsenic and antimony: Sources and toxicity. Arsenic (As) and antimony (Sb) are trace elements with metalloid properties, showing a wide distribution in the environment (Kabata-Pendias & Mukherjee, …
Alkaline sulfide system is mainly a mixture consists of sodium sulfide and sodium hydroxide, which has strong selectivity for leaching of tin, gold, antimony, arsenic and mercury (Anderson and Twidwell, 2008). In high pH condition, S 2-can selectively remove arsenic from enargite.
Antimony is a strategic critical mineral that is used in all manner of military applications, including the manufacture of armor piercing bullets, night vision goggles, infrared sensors, precision ...
The Sb ores from Banxi and Muli are mainly antimony sulfide, and the Sb ore from Tongkeng is a polymetallic sulfide ore. The rock deposit types of Banxi, Muli and Tongkeng Antimony Mine are quartz vein, carbonatite sedimentary-modified and stratoid integrated Sb-plumbum sulfosalt deposits, respectively ( Wu, 1993 ).
Basically, refractory gold ores (gold recovery efficiency of <50% in average using direct cyanidation) are classified into sulfide, tellurium and carbon ores. Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide gold ores (Ubaldini and Vegliò, 2000, Saba, 2011 ...
Antimony Metallurgy. Antimony metallurgy is the technology that extracts antimony metal from antimony ores or produces antimony compounds. Antimony was discovered in the ancient time, and its name was derived from antimonite. In 1604, a process was invented to extract antimony and antimony sulfide as described by B. Valentine of …
Antimony has a negative effect on the gold extraction from antimony–gold concentrate, and it is necessary to remove antimony in advance. For a high calcium low antimony–gold concentrate (Ca–Sb–Au ore), this study proposed to pre-remove antimony using slurry electrolysis in HCl–CaCl 2 system. The results indicated that the optimal …
By way of example we demonstrate the production of high-purity liquid antimony via direct electrolysis of the molten semiconductor, antimony sulfide (Sb 2 S 3), derived from its predominant ore ...
Removing of Antimony from Antimonial Refractory Gold Ores. The main antimony phase of antimonial refractory gold ores is stibnite (Sb 2 S 3). Sodium sulfide is proposed as leaching agent to remove antimony from antimonial refractory gold ores . Meanwhile, sodium hydroxide is also used to prevent the hydrolysis of sodium sulfide.