About 90.06% arsenic and only about 6.89% antimony went into smoke under the condition of roasting temperature of 723.0 K, MnO2 amount of 20.5%, and roasting time of 90 min.

This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation …

The results show that volatilization rates of arsenic and antimony reach 95.36% and only 9.07%, respectively, under the optimum condition of roasting temperature of 350 °C, roasting time of 90 min, sulfur content of 22% and N 2 flow rate of 70 mL/min. In addition, the antimony in the residues can be reclaimed through a reverberatory process.

2000 until now and is focused on the different types of roasting of copper concentrates reported in the literature. A summary of the experimental conditions and major findings of each work is discussed. Depending on the type of roasting, the behavior of arsenic, antimony, and bismuth species during the experiments is analyzed.

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 …

However, volatilization of antimony and bismuth in conventional roasting processes using air or oxygen-deficient air is hardly achieved since antimony and bismuth remain in the calcine as non-volatile oxides. The chloridizing of stibnite with calcium chloride was studied as an alternative to volatilize antimony from impure copper concentrates ...

A sulfur dioxide free method for antimony extraction featured of low-temperature (around 800 °C) roasting was proposed. • The sulfur-fixing and roasting …

Inert roasting can achieve high efficiency removal, but the nature of the products and removal efficiency vary with the temperature of operation. As an example, the roasting of antimony trisulfide (Sb 2 S 3) in the range of 973–1123 K proceeds according to Reaction (7) [28,29]. However, at temperatures higher than 1123 K, Reactions (5) and (6 ...

To recycle arsenic from an As-Sb fly ash, a newly continuous reductive method for obtaining elemental As with additive of PbO was proposed. In the first reduction stage, PbO promoted the As segregation from the As-Sb fly ash, due to which most As volatilized and Sb retained in roasted residues in phases of As-Sb-Pb-O and As-Sb-Pb …

This paper mainly investigated the antimony recovery from antimony-bearing dusts through reduction roasting process after the dust firstly oxidation roasted. CO—CO2 mixture gas was used as reducing agent, and the antimony-containing phase was reduced into Sb4O6, volatilized into smoke, and finally recovered through the …

Under optimized conditions of roasting temperature of 800 °C, CO partial pressure of 7.5 vol% and roasting time of 120 min, 98.40 wt% of arsenic removal rate and 80.40 wt% antimony recovery rate ...

conditions of roasting temperature of 400 °C, roasting time of 100 min and N2 flow rate of 30 mL/min. A higher separation rate of arsenic and antimony was obtained. After being treated, the antimony existed in the roasted residues in the form of Sb2O4, but the corresponding recovery method was not proposed in the research above.

In pyrometallurgy process, the antimony trisulfide (Sb 2 S 3) in the raw material are oxidized at roasting and melting temperatures that result in the formation of Sb 2 O 3 through several stages, mainly in the gas phase (Grund et al., 2000). Tang and Jin (2007) have studied the production of antimony trioxide from antimony concentrate …

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 …

The industrial methods for refining antimony are roasting and reduction with carbon or direct reduction of stibnite with iron. Pure antimony is a soft brittle metal. Antimony …

By fitting the antimony trioxide content evolution of the slag to the calculation according to the integrated rate law, the antimony trioxide evaporation under the present conditions is found to be a second-order reaction. ... (α-Sb 2 O 3) during roasting (550–615 °C) and smelting (660–1100 °C) were investigated (Aracena et al., 2016 ...

A. Shaft furnaces and condensing chambers for the volatilization process, to roast the low-grade ore or the liquation residue, …

Antimony production involves hydrometallurgy and pyrometallurgy, the latter being still dominant. The conventional extraction of antimony from stibnite and jamesonite involves a two-step pyrometallurgical process comprising volatilization roasting and carbothermal smelting (Ouyang et al., 2019; Tian et al., 2016).

Antimony trioxide (Sb2O3) has a wide range of applications, such as in the plastic, rubber, coating flame-retardant defense and anode materials for Li-ion batteries [2]. Roasting of antimony sulfide (Sb2S3) is one of the main sources of antimony trioxide by volatilization smelting technical in blast furnace [3].

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 …

Introduction 2. Physical Properties 3. Chemical Properties 4. Occurrence 5. Beneficiation 6. Recovery of the Metal 6.1. Roasting 6.2. Reduction of ... Skip to Article Content; Skip to Article Information; Search within. Search term ... Antimony Alloys and Intermetallic Compounds. 11. Antimony Compounds. 11.1. Antimony Chlorides. 11.2. …

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.

There are four processes: (1) Volatilization roasting of antimony sulfide lump ore. The reaction is: $$ 2{mathrm{S}mathrm{b}}_2{mathrm{S}}_3+9{mathrm{O}}_2to …

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, liquid-to-solid …

Then with the oxidizing roasting process, which was carried out at the conditions of an air flow rate of 200 ml/min, roasting time of 90 min, roasting temperature of 550°C and pyrite dosage of 5 wt.%, the As-S compounds were oxidized to As 2 O 3 and volatilized with an As removal rate of 92.71%, while the antimony was transformed to ...

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 …

Antimony is not an abundant element but is found in small quantities in over 100 mineral species. It is most often found as antimony(III) sulfide. It is extracted by roasting the antimony(III) sulfide to the oxide, and then reducing with carbon. Antimony can also be found as the native metal.

Antimony sulfide (Sb 2 S 3) concentrate is the main source for the production of antimony oxides and metallic antimony.Few researches have focused on preparing Sb 2 O 3 crystals and Sb 2 O 3 nanomaterials from minerals directly. In this research, a clean, short, direct preparation of Sb 2 O 3 crystals and nanomaterials via microwave oxidation …

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.