研究等業績 - その他 - 柴山　敦

Erosion mechanism of refractories in a pyro-processing furnace for recycling lithium-ion secondary batteries

Murakami Y.

Ceramics International ( Ceramics International )  46 ( 7 ) 9281 - 9288   2020年05月

DOI

Upgrading the iron from low-grade and high-silicate iron ores by magnetic separation

Haga K.

World of Mining - Surface and Underground ( World of Mining - Surface and Underground )  72 ( 3 ) 157 - 161   2020年05月

Recovery of Pd(II) from leach solutions of automotive catalysts by solvent extraction with new thiophosphate extractants

Yamada M.

Hydrometallurgy ( Hydrometallurgy )  191   2020年01月

DOI

Investigation of flotation conditions for treatment of arsenic-bearing copper ore

Bayarmagnai E.

15th International Symposium on East Asian Resources Recycling Technology, EARTH 2019 ( 15th International Symposium on East Asian Resources Recycling Technology, EARTH 2019 )    2020年

Automated Identification of Mineral Types and Grain Size Using Hyperspectral Imaging and Deep Learning for Mineral Processing

N. Okada, Y. Maekawa, N. Owada, K. Haga, A. Shibayama, Y. Kawamura

Minerals   10 ( 809 )   2020年

Surface Properties of Copper-Sulfide Minerals with Sodium-Hydrosulfide Activation

H. Matsuoka, K. Mitsuhashi, M. Kawata, T. Kato, C. Tokoro, K. Haga, A. Shibayama

Minerals Engineering   156   2020年

Upgrading the Iron from Low-Grade and High-Silicate Iron Ores by Magnetic Separation

K. Haga, B. Altansukh, M. Mizutani, K. Higuthi, A. Shibayama

World of Mining   72 ( 3 ) 157 - 161   2020年

Selective and Preferential Separation of Rhodium (III) from Palladium (II) and Platinum (IV) Using a m-Phenylene Diamine-Containing Precipitant

Matsumoto K.

Scientific Reports ( Scientific Reports )  9 ( 1 )   2019年12月

DOI

High-pressure oxidative leaching and iodide leaching followed by selective precipitation for recovery of base and precious metals from waste printed circuit boards ash

Batnasan A.

Metals ( Metals )  9 ( 3 )   2019年03月

DOI

Recovery of Pd(II) and Pt(IV) from leach liquors of automotive catalysts with calixarene-based di-n-alkylamino extractants in saturated hydrocarbon diluents

Yamada M.

Hydrometallurgy ( Hydrometallurgy )  184   103 - 108   2019年03月

DOI

Applying analysis of mineral surfaces to predict flotation behavior

Matsuoka H.

IMPC 2018 - 29th International Mineral Processing Congress ( IMPC 2018 - 29th International Mineral Processing Congress )    1481 - 1488   2019年

Copper recovery and arsenic removal from enargite ores and concentrates during high pressure oxidative leaching

Shibayama A.

IMPC 2018 - 29th International Mineral Processing Congress ( IMPC 2018 - 29th International Mineral Processing Congress )    2539 - 2548   2019年

Gold recovery from waste printed circuit boards by advanced hydrometallurgical processing

Altansukh B.

Materials Transactions ( Materials Transactions )  60 ( 2 ) 287 - 296   2019年

<p>The scope of this study was to improve the hydrometallurgical processes involving iodine-iodide leaching and precipitation for recovery of gold from waste printed circuit boards. Firstly, the influence of different precipitating agents, namely ascorbic acid, trisodium citrate and sodium hydroxide on the recovery of gold from gold-iodide leach liquor were investigated in order to define the most effective precipitating agent. The leach liquor was prepared by dissolving pure gold chips in 1:6 molar ratio of iodine-iodide solution at 40°C, 550 rpm for 12 h. The variables, which affect the efficiency of gold precipitation from the leach liquor, were the molar ratio of precipitating agents to gold, pH and redox potential of the solutions. The attained high gold precipitation efficiency from the leach liquor was more than 99% under the highly acidic (pH < 1.6) and alkaline conditions (pH > 13) induced by 0.1 M ascorbic acid and 0.1 M sodium hydroxide respectively, but 64.5% of gold at a weak alkaline condition (pH 8) with 0.1 M trisodium citrate. Secondly, physico-chemical properties of resultant colloidal solutions and prepared gold particles were examined. Finally, recycling of waste printed circuit boards (WPCBs) via iodine-iodide leaching followed by the ascorbic acid reduction was discussed. Results indicate that over 95% of gold extracted from WPCBs by two-step iodine-iodide leaching under the defined conditions, while the dissolution efficiencies of other precious metals (Ag, Pd) and metal impurities (Cu, Al, Fe, Ni, Pb and Zn) were less than 1% and 3%, respectively. The vast majority of Au (99.8%), Cu (95.6%) and Ag (76.8%) were precipitated from the pregnant leach solution by ascorbic acid reduction at ambient conditions.</p>

DOI

Leaching of gold from waste printed circuit boards in an iodineiodide solution and regeneration of the spent lixiviant

Batnasan A.

IMPC 2018 - 29th International Mineral Processing Congress ( IMPC 2018 - 29th International Mineral Processing Congress )    3072 - 3080   2019年

Pressure leaching of carbonaceous sulfide concentrates for recovery of copper and iron

Magwaneng R.

IMPC 2018 - 29th International Mineral Processing Congress ( IMPC 2018 - 29th International Mineral Processing Congress )    4023 - 4031   2019年

Recovery of rare earth elements and phosphorus from apatite ore by leaching and precipitation

Haga K.

IMPC 2018 - 29th International Mineral Processing Congress ( IMPC 2018 - 29th International Mineral Processing Congress )    2588 - 2595   2019年

Removal of silica and bromine from waste printed circuit boards via superheated steam treatment and dense medium separation

Haga K.

Proceedings of the 10th European Metallurgical Conference, EMC 2019 ( Proceedings of the 10th European Metallurgical Conference, EMC 2019 )  3   983 - 991   2019年

Treatment of Spent LED Light Bulbs for Recycling of Its Components: A Combined Assessment in the Context of LCA and Cost-Benefit Analysis

DODBIBA Gjergj, OSHIKAWA Hiroki, PONOU Josiane, KIM Yonggu, HAGA Kazutoshi, SHIBAYAMA Atsushi, FUJITA Toyohisa

環境資源工学 ( 環境資源工学会 )  66 ( 1 ) 15 - 28   2019年

<p>Recently, the demand for LED light bulbs is rapidly increasing due to an increasing demand for energy saving lightning options. In this work, the elemental composition of LED light bulbs is first analyzed, and then a flowsheet for recovering LED chips and other valuable metals from spent LED light bulbs is put forward. The suggested flowsheet includes eddy current separation (ECS) and air tabling, in addition to several refining processes. The experimental results indicated that the eddy current separation and the air tabling are useful techniques for sorting components of LED bulbs, enabling the recycling of aluminium, plastics, and precious metals, such as gold and silver. Next, five different scenarios for treatment of spent LED light bulbs were considered and a combined life cycle assessment (LCA) and cost-benefit analysis was carried out to find out the most suitable alternative. The results of the combined assessment suggested that the recycling of mainly Al and plastics from spent LED bulbs is an environmentally friendly and cost-effective alternative.</p>

DOI

Erosion Mechanism of Refractories in a pyro-processing Furnace for Recycling Lithium-ion Secondary Batteries

Y. Murakami, Y. Matsuzaki, T. Kamimura, T. Nishiura, K. Masuda, A. Shibayama, R. Inoue

Ceramics International   46   9281 - 9288   2019年

Gold Recovery from Waste Printed Circuit Boards by Advanced Hydrometallurgical Processing

B. Altansukh, K. Haga, H. H. Huang, A. Shibayama

Materials Transactions   60 ( 2 ) 287 - 296   2019年