Abstract: The flotation behaviors of kaolinite, pyrophyllite and illite have been investigated using N-dodecyl-1, 3-diaminopropane (DN12) as a collector. The results indicate that the DN12 is a better cationic collector than the dodecyl amine. When c(DN12)=3×-4mol.L-1,the recoveries of flotation of the three aluminium silicate minerals are all over 80%.In wide pH region, DN12 exhibits strong collection ability on the three aluminium silicate minerals. FTIR-DRIR results provide some evidences of existence of hydrogen bonding between polar group of DN12 and the surface of silicate minerals. DN12 may become a new type of selective collector for reverse flotation to remove aluminium silicate minerals from bauxite.
Flotation mechanism of aluminium silicate minerals with N-dodecyl-1, 3-diaminopropane
Abstract:
The flotation behaviors of kaolinite, pyrophyllite and illite have been investigated using N dodecyl 1, 3 diaminopropane (DN 12 ) as a collector. The results indicate that the DN 12 is a better cationic collector than the dodecyl amine. When c (DN 12 ) = 3×10 -4 ?mol·L -1 , the recoveries of flotation of the three aluminium silicate minerals are all over 80%.In wide pH region, DN 12 exhibits strong collection ability on the three aluminium silicate minerals. FTIR DRIR results provide some evidences of existence of hydrogen bonding between polar group of DN 12 and the surface of silicate minerals. DN 12 may become a new type of selective collector for reverse flotation to remove aluminium silicate minerals from bauxite.
Fig.2 Effects of DN12 concentration on flotation recoveries of three aluminium silicate minerals around pH 7.0
图3 不同pH值条件下, 十二胺对3种铝硅酸盐类矿物浮选回收率的影响
Fig.3 Effects of pH value on flotation recoveries of three aluminium silicate minerals with dodecyl amine as collector (Dodecyl amine concentration 2×10-4?mol·L-1)