roasting antimony sulfides

roasting antimony sulfides

ROASTING OF SULFIDE MINERALS - Wiley Online Library

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 ...

Thermodynamic and kinetics analysis of the sulfur-fixed ...

2019-1-4 · Antimony is mainly used in the production of flame retardants and the manufacture of battery materials, sliding bearings ammunition and solders. Most of the resources of antimony known in the world are distributed in China, accounting for 80% [1- 2]. At present, the main mineral for producing antimony

Roasting of Sulfide Minerals - Physical Chemistry of ...

2016-2-10 · 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. In the extraction of metals from sulfides, roasting is applied to achieve different objectives depending on the overall process flow sheet.

Roasting of Sulfide Minerals | SpringerLink

2021-6-23 · Sulfides are not reduced with the most widely used reducing agents, carbon and hydrogen, because the free energy change for the reactions 2MS + C = 2M + CS 2 and MS + H 2 = M + H 2 S is positive due to the lesser stability of CS 2 and H 2 S, compared to most sulfides. Reduction of sulfides with metals is not economical.

(PDF) BEHAVIOR OF ANTIMONY AND GERMANIUM AT ...

In oxidative roasting of zinc concentrates, antimony sulfides oxidize to antimony oxides (Sb2O3, Sb2O5) and GeS2 oxidizes to GeO2. In this connection Sb2S3 and GeS2 were examined and the ...

Kinetic studies for sulfur-fixing and roasting reduction ...

2019-1-1 · Zinc sulfide (ZnS) and metal antimony products were directly obtained. The separation of antimony and ZnS was then realized by flotation and gravity separation (ZnS flotation technology is very mature). A large amount of ZnO ash was produced in a lead and zinc smelter from the fuming furnace, and its main component was ZnO (>70%).

Extraction of antimony from antimony sulfides bearing ...

Natural ores containing antimony sulfides, or concentrates derived from such ores, are commonly roasted in air to recover the antimony values as the metal or oxide. This process generates large quantities of SO 2 gas, an objectionable air pollutant. The roasting process also converts arsenic present in the ore to arsenic compounds incorporated ...

(PDF) Thermodynamics of salt roasting of sulphide ores

manium, arsenic, antimony, bismuth, zinc and iron will form ... Little attention has been devoted to the reaction process associated with roasting sulfides using NH 4 Cl as a chlorinating agent

Roasting - an overview | ScienceDirect Topics

Oxidation roasting is often used in sulfide ore smelting. It is used to remove the sulfur ore, arsenic, antimony, and other harmful impurities in ore. In oxidation roasting, the sulfide ore is first decomposed into low-valence sulfide and sulfur, and then the oxide is formed. The oxidation roasting of some sulfide ores is exothermic.

Metallic sulphide and sodium carbonate interacting

2015-12-3 · The interaction of nonferrous and iron sulfides with sodium and potassium carbonate is little -studied. Patent 4,541,993 (USA) offers joint sulphatization roasting of sulphide ores and carbonate or bicarbonate of alkali metals for extracting non-ferrous metals (copper, nickel, cobalt and zinc). Studies of the behavior of PbS, Cu 2 S, Bi 2 S 3 FeS 2

Extraction of antimony from antimony sulfides bearing ...

Natural ores containing antimony sulfides, or concentrates derived from such ores, are commonly roasted in air to recover the antimony values as the metal or oxide. This process generates large quantities of SO 2 gas, an objectionable air pollutant. The roasting process also converts arsenic present in the ore to arsenic compounds incorporated ...

Zinc Roasting Furnaces - Metallurgist & Mineral

2017-5-3 · In roasting ores from the North Star mine (Hailey, Ida.) in the small electric roaster, the outlet air tube became choked with arsenic trioxide shortly after the roasting had started, and further evolution of arsenic soon ceased. Antimony appears to be

Roasting - A Study on Environmental Aspects, Off-Gas ...

Roasting of sulfide concentrates and refractory ores is an important process step in the production of metals and chemicals. Sulfides of iron, zinc, copper and other metals are oxidised with air between 600 and 1000C into metal oxides or sulfates and gaseous sulfur dioxide. Roasting of gold concentrates and ores is a typical processing step used to produce a porous calcine suitable for cyanide ...

Antimony & Gold - Tri Star

The clean roasting antimony technology developed by Tri-Star sold to joint venture company, Strategic & Precious Metals Processing LLC in 2015 has opened the treatment again of these world gold resources, estimated to be 30% to 50% of remaining gold in the ground. The second phase of SPMP’s proposed antimony plant in Oman envisages a ...

(PDF) Thermodynamics of salt roasting of sulphide ores

manium, arsenic, antimony, bismuth, zinc and iron will form ... Little attention has been devoted to the reaction process associated with roasting sulfides using NH 4 Cl as a chlorinating agent

SELECTIVE EXTRACTION OF MERCURY AND ANTIMONY

2010-8-12 · antimony. Studies included petrographic, spectrographic, and chemical analyses, gravity-separation tests, bulk flotation of mercury and antimony sulfides, differ-ential flotation, leaching, and furnacing of crude ore and of flotation concentrate. Results of this investigation indicate that bulk flotation of sulfides

Establishing thE ProcEss MinEralogy of gold orEs

8 Antimony sulfide ores Gold occurs mainly as native gold, with minor to moderate amount of aurostibite, either liberated or locked in sulfides. Big Bell (Australia), Hechi (China), Manhattan (USA) 9 Bismuth sulfide ores Gold occurs mainly as native gold, with minor to moderate amounts of maldonite. Submicro-

A fundamental study of the alkaline sulfide leaching of

2015-12-27 · Many gold ores are problematic as they contain metal sulfides, such as pyrite, arsenopyrite and chalcopyrite. These ores are often refractory, as the gold is encapsulated within the sulfide matrix. In order to recover the gold, the host matrix must be destroyed. Over the past 100 years, roasting

Small Scale Treatment of PM Sulfide Ores - Gold Refining ...

2020-2-15 · I'm a bit nervous about working with sulfides - especially roasting. As an alternative to roasting, I've read, after a fine grind - say 200 minus - then, in a open air vat, if I add a small amount of fertilizer, keep damp, and stir occasionally, that naturally occurring bacteria will remove the sulfur - likely taking a few months to do so.

Sulfides - Gold Recovery Methods - ICMJ's Mining Journal ...

2015-9-4 · Posted August 21, 2015. We have had great sucess recovering gold from sulfides with out thiourea based solution. Our recovery rate is usually 94 to 96%. The key to recovery with sulfides is the grind size of the ore while leaching to make sure that your leach solution can make Co

Extraction of antimony from antimony sulfides bearing ...

Natural ores containing antimony sulfides, or concentrates derived from such ores, are commonly roasted in air to recover the antimony values as the metal or oxide. This process generates large quantities of SO 2 gas, an objectionable air pollutant. The roasting process also converts arsenic present in the ore to arsenic compounds incorporated ...

Roasting - A Study on Environmental Aspects, Off-Gas ...

Roasting of sulfide concentrates and refractory ores is an important process step in the production of metals and chemicals. Sulfides of iron, zinc, copper and other metals are oxidised with air between 600 and 1000C into metal oxides or sulfates and gaseous sulfur dioxide. Roasting of gold concentrates and ores is a typical processing step used to produce a porous calcine suitable for cyanide ...

Antimony & Gold - Tri Star

The clean roasting antimony technology developed by Tri-Star sold to joint venture company, Strategic & Precious Metals Processing LLC in 2015 has opened the treatment again of these world gold resources, estimated to be 30% to 50% of remaining gold in the ground. The second phase of SPMP’s proposed antimony plant in Oman envisages a ...

ANTIMONY PRODUCTION BY CARBOTHERMIC

2014-4-2 · roasting/smelting stages to produce Sb 2 O 3 without producing the non-volatile SbO 2 is difficult [2]. In general, in the roasting/smelting of stibnite, the production of noxious antimony vapors and sulfur dioxide (SO 2) is unavoidable; therefore, this process has serious problems of atmospheric contamination. The direct reduction of metal ...

Process for the recovery of antimony - NATIONAL LEAD

However, if the antimony feed material is primarily an oxide form of antimony, both the time and temperature of the roasting operation may be changed to accommodate this type of feed. Antimony feed materials containing relatively important quantities of both antimony oxides and antimony sulfides may be used by selection of proper roast conditions.

金矿非氰化浸金研究进展 - USTB

2020-11-15 · 《工程科学学报》(Chinese Journal of Engineering)是由教育部主管、北京科技大学主办的学术类科技期刊,ISSN 2095-9389, CN 10-1297/TF,月刊,国内外公开发行,主要刊载工学领域的具有创新意义或有较大应用价值的高水平研究论文。

Establishing thE ProcEss MinEralogy of gold orEs

8 Antimony sulfide ores Gold occurs mainly as native gold, with minor to moderate amount of aurostibite, either liberated or locked in sulfides. Big Bell (Australia), Hechi (China), Manhattan (USA) 9 Bismuth sulfide ores Gold occurs mainly as native gold, with minor to moderate amounts of maldonite. Submicro-

A fundamental study of the alkaline sulfide leaching of

2015-12-27 · Many gold ores are problematic as they contain metal sulfides, such as pyrite, arsenopyrite and chalcopyrite. These ores are often refractory, as the gold is encapsulated within the sulfide matrix. In order to recover the gold, the host matrix must be destroyed. Over the past 100 years, roasting

Metallurgy - US Antimony

2021-8-31 · Metallurgy. LIQUATION: Liquation is the melting of stibnite into “crudum” or “needle antimony”. It is carried out between 550 and 600 degrees C. If the temperature is lower, the recovery is poor. If the temperature is any higher, the stibnite volatilizes into

Small Scale Treatment of PM Sulfide Ores - Gold Refining ...

2020-2-15 · I'm a bit nervous about working with sulfides - especially roasting. As an alternative to roasting, I've read, after a fine grind - say 200 minus - then, in a open air vat, if I add a small amount of fertilizer, keep damp, and stir occasionally, that naturally occurring bacteria will remove the sulfur - likely taking a few months to do so.