Synthesis, characterization, and catalytic properties of nano-SnO by chemical vapor transport (CVT) process under CO-CO 2 atmosphere

Su, Zijian; Zhang, Yuanbo; Han, Benlai; Liu, Bingbing; Lu, Manman; Peng, Zhiwei; Li, Guanghui; Jiang, Tao

doi:10.1016/j.matdes.2017.02.063

Cited by 21 publications

(5 citation statements)

References 27 publications

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“…It was known that both of SnO and SnCl 2 could volatilize as gaseous phase at a relative lower temperature, hence, the effect of generated gasous products (partial pressure) on the reaction equilibrium were calculated and plotted in Fig. 7 34–37 . Based on the ΔG-T relationship of Eqs (3)–(5), the CO/(CO + CO 2 )-T equilibrium relationship at given SnO/SnCl 2 partial pressures was calculated, and the gas-phase equilibrium diagram was presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

A value-added multistage utilization process for the gradient-recovery tin, iron and preparing composite phase change materials (C-PCMs) from tailings

Chen

et al. 2019

Sci Rep

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Tin-, iron-bearing tailing is a typically hazardous solid waste in China, which contains plenty of valuable tin, iron elements and is not utilized effectively. In this study, a multistage utilization process was put forward to get the utmost out of the valuable elements (tin and iron) from the tailings, and a gradient-recovery method with three procedures was demonstrated: (1) An activated roasting followed by magnetic separation process was conducted under CO-CO2 atmosphere, tin and iron were efficiently separated during magnetic separation process, and 90.8 wt% iron was enriched in magnetic materials while tin entered into non-magnetic materials; (2) The tin-enriched non-magnetic materials were briquetted with CaCl2 and anthracite and roasted, then tin-rich dusts were collected during the chloridizing roasting process; (3) The roasted briquettes were infiltrated in melting NaNO3 to prepare NaNO3/C-PCMs by a infiltration method. Three kinds of products were obtained from the tailings by the novel process: magnetic concentrates containing 64.53 wt.% TFe, tin-rich dusts containg 52.4 wt.% TSn and NaNO3/C-PCMs for high temperature heat storage. Such a comprehensive and clean utilization method for tin-, iron-bearing tailings produced no secondary hazardous solid wastes, and had great potential for practical application.

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Section: Resultsmentioning

confidence: 99%

A value-added multistage utilization process for the gradient-recovery tin, iron and preparing composite phase change materials (C-PCMs) from tailings

Chen

et al. 2019

Sci Rep

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“…First, the possible reactions of ZnS, ZnCO 3 and ZnSO 4 in the pre-drying tropics are analyzed, as shown in Table 4. For a reaction involving gas, the partial pressure of the system has a significant effect on the reaction equilibrium [28].…”

Section: Reaction Thermodynamics Of Zinc-bearing Minerals During the ...mentioning

confidence: 99%

Reaction Behavior and Transformation Path of Zinc in the Heating-Up Zone during Sintering Process

Gan

Fan

et al. 2022

Sustainability

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Iron ore sintering is a simple and sustainable way to treat zinc-bearing secondary resources. In this paper, the reaction behavior of zinc was studied by combining thermodynamic calculation and simulation tests under sintering temperature and atmosphere. The evolution law of Zn-containing phases during the heating process was also revealed. The results showed that Zn-containing substances were mainly converted to ZnO when the temperature reached 700 °C in the pre-drying zone, and ZnO started to combine with Fe2O3 to form ZnFe2O4 when the temperature reached 800 °C in the combustion zone. ZnFe2O4 remained stable at 1300 °C, and did not change in the atmosphere with low CO concentration. In conventional sintering conditions, the removal rate of zinc was about 5 wt%, zinc was mainly converted to ZnFe2O4 and stuck in the sinter. Therefore, to meet the zinc amount of the blast furnace load, pretreatment of raw materials or ore matching to control zinc content is necessary.

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“…The roasting tests were performed in the high-temperature zone of a horizontal electric resistance furnace. An experimental schematic diagram for the roasting tests is the same as that reported in the previous study [16,32]. The materials were weighed precisely at a certain molar ratio and mixed up gently with an agate mortar and pestle for 30 min.…”

Section: Roasting Processmentioning

confidence: 99%

Effect of Quartz on the Preparation of Sodium Stannate from Cassiterite Concentrates by Soda Roasting Process

Zhang

Han

et al. 2019

Minerals

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Sodium stannate (Na2SnO3) has been successfully prepared by a novel process of roasting cassiterite concentrates and sodium carbonate (Na2CO3) under CO–CO2 atmosphere, namely soda roasting-leaching process. However, more than 22 wt. % tin of the cassiterite was not converted into Na2SnO3 and entered the leach residues. Quartz (SiO2) is the predominant gangue in the cassiterite, and phase evolution of SnO2–SiO2–Na2CO3 system roasted under CO–CO2 atmosphere was still uncertain. In this study, the effect of SiO2 in cassiterite concentrates on preparation of Na2SnO3 was clarified. The results indicated that Na8SnSi6O18 was inevitably formed when cassiterite and Na2CO3 were roasted above 775 °C under CO–CO2 atmosphere via the reaction of SnO2 + 6SiO2 + 4Na2CO3 = Na8SnSi6O18 + 4CO2, and formation of Na8SnSi6O18 would be increased with increasing roasting temperature and Si/Sn mole fraction. In addition, it was found that Na8SnSi6O18 was insoluble in the leachate at pH value range of 1–14, which, therefore, was enriched in the leach residues. The silicon content of the cassiterite concentrates should be controlled as lower as possible to obtain a higher conversion ratio of Na2SnO3.

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Synthesis, characterization, and catalytic properties of nano-SnO by chemical vapor transport (CVT) process under CO-CO 2 atmosphere

Cited by 21 publications

References 27 publications

A value-added multistage utilization process for the gradient-recovery tin, iron and preparing composite phase change materials (C-PCMs) from tailings

A value-added multistage utilization process for the gradient-recovery tin, iron and preparing composite phase change materials (C-PCMs) from tailings

Reaction Behavior and Transformation Path of Zinc in the Heating-Up Zone during Sintering Process

Effect of Quartz on the Preparation of Sodium Stannate from Cassiterite Concentrates by Soda Roasting Process

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