Fundamental Studies on Interfacial Tensions in Flotation. I : Determination of Surface Tension with Data on Aqueous Solutions of Frothers
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概要
- 論文の詳細を見る
(1) The determination of surface tension by the ring method is studied in detail. (2) A metal fitting for indicating the normal position of the beam of the tensiometer is devised and the scale is calibrated. (3) The measuring dish and the circulating pump, made of glass and capable of agitating and feeding fresh liquid at any constant temperature, are developed. The constant-temperature water bath for the circulating pump is described. (4) The error due to the rise of the beam from the zero point during measurement of the surface tension of pure water prepared by distillation from alkaline permanganate and from sulphuric acid amounts to 4.5°in angle or 0.033 g in weight. (5) It is shown that the accurate value of the surface tension of pure water of 71.82 dynes/cm at 26.2℃, differing by only 0.03 dyne/cm from the standard value given in the International Critical Tables, can be obtained by the Du Nouey's tensiometer modified by the author with adequate precautions. (6) The syringe fused with a glass capillary is used for the preparation of aqueous solutions of frothers and it is accurately weighed by inserting it in a glass cap. The error of the ordinary method using the average weight of 10 or more drops as the weight of one drop of frother, is found to be about 1% in summer and 2% in winter for terpineol. (7) Various existing equations expressing the relation between the surface tension and concentration of solutions are critically studied. (8) The measured values of the surface tension of aqueous solutions of pure as well as commercial frothers are in good agreement with the values calculated by Szyszkovski's equation.
- 東北大学の論文
著者
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Wada Masayoshi
The Research Institute Of Mineral Dressing And Metallurgy
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Wada Masayoshi
The Reesarch Institute Of Mineral Dressing And Metallurgy
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- Fundamental Studies on Interfacial Tensions in Flotation. I : Determination of Surface Tension with Data on Aqueous Solutions of Frothers
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