Properties of Na<sub>2</sub>O–SiO<sub>2</sub> slags in Doré smelting

Avarmaa, Katri; O’Brien, Hugh; Valkama, Marcus; Klemettinen, Lassi; Niemi, Erkki; Taskinen, Pekka

doi:10.1080/08827508.2017.1391246

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…The Kaldo process is the most widely used method in anode slime treating due to its large processing capacity, good adaptability for raw materials, good environmental behavior and high mechanization level. Researchers have done a lot of work in enhancing the recovery efficiency of Se and Te, Avarmaa et al [11] studied the distribution behavior of Te in Ag and Na2O-SiO2 slag at 1000-1300℃ with the Kaldo process as background, Kong [12] reported the behavior of major elements in the Kaldo process and found that more than 98% Se &…”

Section: Introductionmentioning

confidence: 99%

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

Liu

et al. 2021

JOM

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Single particle experiments have been carried out in the present study. An industrial copper matte powder, containing 68.04 wt. % Cu, 0.50 wt. % Se and 0.08 wt. % Te has been taken as the starting material. Se and Te phase assemblies and distribution behaviors have been systematically investigated in air atmosphere. After experiments, Se reported to blister copper, matte and oxide phase, whilst Te will enrich in oxide phases, including phases of the Fe-Si-Te-O, Ca-Fe-Te-O, and Ca-Te-O-(S) systems. Along with the increasing of temperature, selenium and tellurium content in copper and matte phases decrease. The introduction of CaO flux and typical impurities, Pb and Si, had significant influence on the Se and Te distribution. Results revealed that CaO addition and Si impurity accelerated the removal of Se and Te from the copper and matte phase, but the Pb impurity helped for more Se and Te in Cu rich phases.

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Section: Introductionmentioning

confidence: 99%

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

Liu

et al. 2021

JOM

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“…He found that the distribution coefficient is strongly dependent on the FeO concentration in the silicate. Avarmaa et al [12] studied the behavior of tellurium in Doré smelting, i.e. between metallic silver and different types of SiO 2 -Na 2 O slags at 1000-1300 °C.…”

Section: Introductionmentioning

confidence: 99%

Recycling of tellurium via copper smelting processes

et al. 2020

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The modern world continuously demands more raw materials for manufacturing all kinds of products. Nowadays, the lifetime of a single product can be very short, as is the case with electronic appliances. Waste electrical and electronic equipment (WEEE) is one of the fastest growing waste categories, and one of the most promising recycling routes for WEEE is to use it as a feed material in pyrometallurgical copper smelting. This article presents new experimental observations regarding the behavior of tellurium in secondary copper smelting process, and compares the results to primary smelting experiments. In secondary smelting conditions, most of tellurium distributed into the copper phase, and the distribution coefficient between copper and slag decreased with increasing oxygen partial pressure. In the primary smelting experiments, most of tellurium was vaporized into flue dusts, and the distribution coefficient between copper matte and slag increased with increasing oxygen pressure, i.e. increasing matte grade.

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An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

Chen

Avarmaa

Michallik

2022

Calphad

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Properties of Na₂O–SiO₂ slags in Doré smelting

Cited by 7 publications

References 36 publications

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

Recycling of tellurium via copper smelting processes

An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

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Properties of Na2O–SiO2 slags in Doré smelting

Cited by 7 publications

References 36 publications

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

A Study of Selenium and Tellurium Distribution Behavior, Taking the Copper Matte Flash Converting Process as the Background

Recycling of tellurium via copper smelting processes

An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

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Properties of Na₂O–SiO₂ slags in Doré smelting