著者

西岡 宣泰 甲斐 匠 岡本 将裕 武部 博倫

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.138, no.12, pp.170-178, 2022-12-30 (Released:2022-12-23)

参考文献数

20

被引用文献数

1

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A hand-made apparatus to react copper concentrate (Cc)/pyrite (Py)/silica sand (Ss) mixture was developed for an imitated concentrate burner at laboratory scale. An instantaneous (< 1 s) ignition reaction was macroscopically observed by preheated oxygen gas blowing to Cc/Py/Ss mixture with a Fe/SiO2 mass ratio of 1.1. SEM-EDS analysis was used to observe microstructure and phase distribution in reacted and water-quenched particles. As for the Cc/Ss samples collected at the point close to the gas blowing spot, 70–80 mass% Cu matte phase and heterogeneous slag phase including large amounts of magnetite (Mag) particles were formed. At the lower part from the gas blowing spot with a distance of 275 mm, 60–65 mass% Cu matte phase was confirmed. The area fraction of Mag particles in the slag phase decreased with increasing Py adding concentration in the mixture sample. Our results suggested the concentration and microscopic distribution of Py in the mixture including Cc contributed to control both Cu concentration in matter phase and Mag particle concentration in slag phase.

著者

葛巻 星 西岡 宣泰 藤代 史 武部 博倫

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.137, no.11, pp.110-115, 2021-11-30 (Released:2021-11-30)

参考文献数

27

被引用文献数

2

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A stabilized zirconia oxygen probe was used to measure the oxygen partial pressure (OPP) at an electrode submerged in a copper slag melt at 1300 ℃. The OPP was controlled in the range of 10−10–10−5 atm owing to the presence or absence of a powdered carbon layer on the slag melt using a high-purity alumina crucible in argon (Ar) gas flow. Under suppression of magnetite formation at an OPP of approximately 10−10 atm, the viscosities of the copper slag and FeO-Fe2O3-SiO2-Al2O3 slag melts were measured between 1200 ℃ and 1300 ℃. The obtained values were in the range of 1.0×102–7.8×102 mPa・s. The dependences of total Fe/SiO2 mass ratio and Al2O3 concentration on viscosity were qualitatively interpreted from the aluminosilicate network structure viewpoint.