Separation of arsenic from arsenic—antimony-bearing dust …
The feasibility of a new method for separating arsenic from arsenic—antimony-bearing dusts using CuS was put forward, in which Sb was transformed into Sb 2 O 4 and Sb 2 S 3 that stayed in the roasted calcine while As was volatilized in the form of As 4 O 6.The factors such as roasting temperature and CuS addition amount …
Thermodynamic and kinetics analysis of the sulfur-fixed …
Aiming at these problems, we present a new method of sulfur-fixing roasting of antimony sulfide. This method uses ZnO as a sulfur-fixing agent, and roasting with Sb 2 S 3 was carried out at 673 K~1073 K to produce Sb 2 O 3 and ZnS. By calculating the thermodynamics of the reactions, we can conclude that the Gibbs Free Energy Change …
Direct production of antimony by reduction and sulfur-fixing …
Blast furnace volatilizing (smelting) and reverberatory furnace process is the main reduction method in the current antimony smelting process, and it is associated …
Antimony xide Production and Uses
Antimony xide can be produced by roasting antimony trisulfide, burning antimony in an oxygen-rich environment, or hydrolyzing antimony halides or antimony trisulfide. ... Sb2O3 is used in HIPS for products like television backs, domestic electrical appliances, and housings for electrical equipment, including computers (PCs).
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 …
Low-Temperature Microwave Carbothermic Reduction …
One-step extraction of antimony from stibnite concentrate at low temperature was performed by the carbothermic reduction method using zinc oxide as … See more
Metals | Free Full-Text | Phase and Morphology …
Metallurgical extraction of antimony (Sb) currently has the limitations of high energy consumption and adverse environmental impact. In this study, we proposed …
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 …
Low-Temperature Microwave Carbothermic Reduction …
antimony sulfide and the reduction products obtained under different roasting conditions. A synchronous thermal analyzer (STA 449F3, Netzsch Group, Germany) was …
Recovery of antimony and bismuth from tin anode slime after …
In this study, a combined process of Na 2 S leaching and NaCl-H 2 SO 4 leaching was developed to extract antimony and bismuth from tin anode slime after soda roasting–alkaline leaching. The optimal conditions for the extraction of antimony have been established as: Na 2 S concentration of 0.7 mol/L, temperature of 85 °C, …
Sulfur fixation and reduction roasting of stibnite for clean …
The direct sulfur fixation and reduction roasting of antimony sulfide (Sb 2 S 3) were investigated for antimony extraction, based on the combination of metallurgy and beneficiation.Zinc oxide (ZnO) and carbon, used as the sulfur-fixing agent and reductant, respectively, were roasted with Sb 2 S 3 to form Sb metal and zinc sulfide (ZnS). The …
Metallic antimony preparation by carbothermic reduction of …
Moreover, Sb metal microwave roasting products is distributed in large blocks. Larger Sb blocks improve the separation efficiency. ... At 500–600 °C, for conventional roasting, the antimony sulfide melts and the micro-region of antimony sulfide migration and aggregation appears. At this stage, the system primarily undergoes …
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 ...
An Overview of the Behavior of Concentrates with Arsenic, Antimony…
In this paper, a review on the fundamentals of the current treatments aimed at removing arsenic, antimony, and bismuth from copper concentrates under roasting conditions is presented.
Separation of Arsenic from the Antimony-Bearing Dust …
Three steps were conducted in the roasting tests. First, the antimony-bearing dust and CuO were mixed fully. Second, mixtures of antimony-bearing dusts and CuO were roasted in the tube furnace for 25 to 125 minutes at 623 K to 723 K (350 °C to 450 °C) under N 2 atmosphere when the temperature reached a constant value. The off …
Cleaning of high antimony smelting slag from an oxygen
The chemical compositions of the slag used in this study are presented in Table 1.The slag, essentially a mixed oxide phase, contains antimony oxide, such as Sb 2 O 3 and Sb 2 O 4.The Gibbs energy (ΔG) of antimony oxide compounds reacting with carbon at varying temperature was calculated (Fig. 2).Obviously, these reactions can …
roasting by products of antimony
by products from roasting antimony Prominer Antimony and Gold Tri Star The clean roasting antimony technology developed by TriStar sold to joint venture com. Toggle navigation. Home; About Us; Products; Cases; Solutions; ... roasting by products of antimony T01:12:14+00:00 Who we are > Products > Cases > Solutions > …
Low-Temperature Microwave Carbothermic Reduction …
2 is the mass of the roasting products, g; C 1 is the Sb content in the raw mixture, %; C 2 is the metallic Sb content in the roasting products, %; S 1 and S 2 are the sulfur contents in the raw mixture and roasting products, respectively. Permittivity Analysis The ability of a material to absorb microwave energy depends on its dielectric ...
Separation and Recovery of Antimony from High Arsenic …
The left antimony existing in the roasted products can be reclaimed through a process of reduction roasting and dust collection. XRD pattern of the high arsenic-bearing flue dust. Mineral phase's ...
Volatilization of Arsenic and Antimony from …
The findings obtained from this study can be summarized as follows: (1) In nitrogen atmospheres, maximum volatilization of arsenic and antimony achieved 95% and 90% for 60 minutes of roasting at 700°C and 1200°C, respectively. Under the roasting conditions, antimony volatilization did not took place at 700°C.
Roasting in Metallurgy
Roasting to Eliminate Arsenic and Antimony. H. M. Howe, in explaining how this is effected, distinguishes three horizontal zones in the ore: the upper surface, where oxidation is only slightly hindered by sulphurous and sulphuric acids and by the products of combustion of the fuel; the middle layers where oxidation proceeds to a very limited ...
Selective removal of arsenic from crude antimony xide by leaching
The structural destruction of the (As, Sb) 2 O 3 solid solution was also achieved by roasting raw materials (e.g., Sb dust) with various additives, including MnO 2 [12], CuO [13], ... Due to the depletion of high-grade antimony resources, more complex antimony-bearing ores and by-products have been exploited for NaSb(OH)6 …
Selective removal of arsenic from crude antimony xide by leaching
1. Introduction. In recent years, the recovery of Sb from industrial residues has attracted increasing attention due to the increasing criticality of antimony, especially in the European Union [1], [2], [3], [4].According to U.S. Geological Survey [5], the known Sb reserves (1.5 million tons) could be depleted in ten years at the current mining speed …
A Review on Pyrometallurgical Extraction of Antimony from …
Li, L.; Xu, M.; Li, Q. Arsenic pre-removal from antimony oxide powder by roasting with pyrite (FeS2) for decreasing arsenic transfer and pollution in the followed …
Antimony and Antimony Compounds
Roasting. 6.2. Reduction of Oxide to the Metal. 6.3. Direct Reduction to the Metal. 6.4. Hydrometallurgical and Electrolytic Methods. 6.5. Recovery from …
Reduction mechanism and optimization of prepare metallic antimony …
In this work, a clean microwave carbothermal reduction of Sb 2 O 3 mineral to prepare metallic antimony ingot is proposed. Response surface methodology was used to optimize condition for microwave carbothermal reduction of Sb 2 O 3.The roasting temperature, roasting duration, carbon powder ratio and NaCl addition ratio was …
How to Remove Arsenic, Antimony & Bismuth from …
The products, refined copper and refinery-slag, together contain quantities of arsenic, antimony and bismuth equal to those present in the blister-copper subjected to the operation. In the tables on p. 663 the products of refining are calculated from the working-results on 100 tons of blister-copper.
Analysis of Antimony Sulfide Oxidation Mechanism in …
The phase transformation mechanism of antimony sulfide in the oxygen-enriched smelting system was investigated. The standard Gibbs free energy change (ΔG θ) of reactions in the smelting system at 100 ~ 1400°C were calculated, indicating that the reaction between Sb 2 S 3 and oxygen was liable to occur first, and that the high-valent …
Direct production of antimony by reduction and sulfur-fixing roasting …
This new plant is producing electrolytic lead, bismuth, antimony, and precious metals as final products and copper sulfide, cement copper, zinc hydro-oxide as by-products, separating arsenic ...
Enrichment of Gold in Antimony Matte by Direct Smelting …
Conventional cyanidation technology achieves low gold recovery when used to process refractory gold concentrate. Based on the geochemical characteristics of gold deposit mineralization, a new method is proposed herein for gold enrichment in antimony matte by smelting of refractory gold concentrate. The effects of the FeO/SiO2 and …