TY - GEN
T1 - Applying analysis of mineral surfaces to predict flotation behavior
AU - Matsuoka, H.
AU - Kawarabuki, R.
AU - Mitsuhashi, K.
AU - Kawata, M.
AU - Tokoro, C.
AU - Haga, K.
AU - Shibayama, A.
N1 - Publisher Copyright:
© IMPC 2018 - 29th International Mineral Processing Congress. All rights reserved.
PY - 2019
Y1 - 2019
N2 - The mineral surface characteristic is important for the flotation because it affects the flotation behavior of the mineral. Conventionally, in the flotation process for Cu sulphide ores, the degree of ore floatabilities varies depending on the mineral phase such as chalcopyrite, bornite, or chalcocite. Therefore, mineral surfaces are treated with activators and depressants to control the floatability of target minerals and obtain high recovery performance. There are lots of flotation reagents which have many effects on ores depending on ore characteristics and conditioning methods. For example, sodium hydrosulphide (NaHS) as activator is known to have the effect of re-sulfurizing and activating oxidized surface of chalcocite and bornite. On the other hand, NaHS is reported to depress chalcopyrite floatability. In this study, the evaluation of mineral surfaces was conducted to predict flotation behavior. Activation of Cu minerals (chalcocite, bornite, and chalcopyrite) by NaHS was experimented. The three Cu minerals were treated in two steps. Firstly, they were oxidized in the drying oven. Secondly, they were treated with NaHS solution. After each treatment step, each mineral was measured by contact angle apparatus then analyzed by X-ray photoelectron spectroscopy (XPS). The results of surface characteristics after oxidation and NaHS treatment were utilized to accomplish the study's objective.
AB - The mineral surface characteristic is important for the flotation because it affects the flotation behavior of the mineral. Conventionally, in the flotation process for Cu sulphide ores, the degree of ore floatabilities varies depending on the mineral phase such as chalcopyrite, bornite, or chalcocite. Therefore, mineral surfaces are treated with activators and depressants to control the floatability of target minerals and obtain high recovery performance. There are lots of flotation reagents which have many effects on ores depending on ore characteristics and conditioning methods. For example, sodium hydrosulphide (NaHS) as activator is known to have the effect of re-sulfurizing and activating oxidized surface of chalcocite and bornite. On the other hand, NaHS is reported to depress chalcopyrite floatability. In this study, the evaluation of mineral surfaces was conducted to predict flotation behavior. Activation of Cu minerals (chalcocite, bornite, and chalcopyrite) by NaHS was experimented. The three Cu minerals were treated in two steps. Firstly, they were oxidized in the drying oven. Secondly, they were treated with NaHS solution. After each treatment step, each mineral was measured by contact angle apparatus then analyzed by X-ray photoelectron spectroscopy (XPS). The results of surface characteristics after oxidation and NaHS treatment were utilized to accomplish the study's objective.
KW - Bornite
KW - Chalcocite
KW - Chalcopyrite
KW - Contact angle
KW - Floatability
KW - Mineral surface
KW - NaHS
KW - XPS
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M3 - Conference contribution
AN - SCOPUS:85059439368
T3 - IMPC 2018 - 29th International Mineral Processing Congress
SP - 1481
EP - 1488
BT - IMPC 2018 - 29th International Mineral Processing Congress
PB - Canadian Institute of Mining, Metallurgy and Petroleum
T2 - 29th International Mineral Processing Congress, IMPC 2018
Y2 - 17 September 2018 through 21 September 2018
ER -