TY - GEN
T1 - Recovery of nickel from reverberatory furnace slag by sulfurization and flotation
AU - Nheta, Willie
AU - Kalenga, Michel
AU - Rasivhetshele, Ndivhuwo
N1 - Publisher Copyright:
© 2019, International Multidisciplinary Scientific Geoconference. All rights received.
PY - 2019
Y1 - 2019
N2 - Due to depletion of high-grade ores, high cost of mining and environmental issues, many mines have reverted to retreatment of slags. The recovery of Nickel from reverberatory furnace slag using sulfurization and flotation was studied. Critical parameters such as sulfurization temperature, sulfurization agent (Gypsum containing 86.87% CaSO4) dosage and time were investigated for the sulfurization process and effect of collector type and dosage, pH, particle size and flotation time for the flotation process. It was found that the slag contained 0.37% Cu and 0.19 % Ni as Copper oxide and Nickel oxide and other mineral phases such as fayalite, cuprospinnel and pentlandite. Optimum conditions for sulfurization were addition 20g of gypsum, 8g of Coke at a temperature of 950 ℃ under inert environment (argon) in a tube furnace for one hour. All of the Nickel oxide was sulfurized to Nickel sulfide and Millerite. 88.3 % Nickel was recovered after flotation under optimum conditions of 0.20g/t Potassium amyl xanthate (PAX), 5 drops of Dowfroth 200, 80% passing 75 microns at a pH of 7 in a micro flotation cell. The recovery of Nickel sulphide was very much dependent on collector dosage.
AB - Due to depletion of high-grade ores, high cost of mining and environmental issues, many mines have reverted to retreatment of slags. The recovery of Nickel from reverberatory furnace slag using sulfurization and flotation was studied. Critical parameters such as sulfurization temperature, sulfurization agent (Gypsum containing 86.87% CaSO4) dosage and time were investigated for the sulfurization process and effect of collector type and dosage, pH, particle size and flotation time for the flotation process. It was found that the slag contained 0.37% Cu and 0.19 % Ni as Copper oxide and Nickel oxide and other mineral phases such as fayalite, cuprospinnel and pentlandite. Optimum conditions for sulfurization were addition 20g of gypsum, 8g of Coke at a temperature of 950 ℃ under inert environment (argon) in a tube furnace for one hour. All of the Nickel oxide was sulfurized to Nickel sulfide and Millerite. 88.3 % Nickel was recovered after flotation under optimum conditions of 0.20g/t Potassium amyl xanthate (PAX), 5 drops of Dowfroth 200, 80% passing 75 microns at a pH of 7 in a micro flotation cell. The recovery of Nickel sulphide was very much dependent on collector dosage.
KW - Flotation
KW - Nickel
KW - Slag retreatment
KW - Sulfurization
KW - Xanthate
UR - http://www.scopus.com/inward/record.url?scp=85073366654&partnerID=8YFLogxK
U2 - 10.5593/sgem2019/1.3/S03.127
DO - 10.5593/sgem2019/1.3/S03.127
M3 - Conference contribution
AN - SCOPUS:85073366654
T3 - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SP - 979
EP - 985
BT - Education and Accreditation in Geosciences; Environmental Legislation, Multilateral Relations and Funding Opportunities
PB - International Multidisciplinary Scientific Geoconference
T2 - 19th International Multidisciplinary Scientific Geoconference, SGEM 2019
Y2 - 30 June 2019 through 6 July 2019
ER -