<報文>硫酸鉛と酸化第二鉄の浮選分離

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  • <Original Papers>Separation of Lead Sulfate and Ferric Oxide by Flotation

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Separation between artificial lead sulfate and ferric oxide particles was studied by means of flotation, using sodium hexadecyl sulfate (SHS) as a collector for lead sulfate in relation to the treatment of waste produced in hydrometallurgical zinc plant. Flotation tests were carried out on lead sulfate and ferric oxide, alone and in mixed suspensions, using a Denver type laboratory flotation cell of 250ml capacity. The results are summurized as follows. 1) In the individual flotation test, it was possible to find an optimum condition, i.e. pH=2 and SHS=100～500g/T, at which complete flotation of lead sulfate with no flotation of ferric oxide was obtained. 2) In flotation tests with mixed suspensions, however, no successful results were obtained at the condition described above ; floatability of lead sulfate decreased and that of ferric oxide increased. 3) Flotation test and zeta potential measurements indicated that starch was effective to depress ferric oxide. 4) It was possible to separate lead sulfate from an artificial mixture with ferric oxide with limited success by controlling the dosage of starch at pH2 and an appropriate dosage of SHS.

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