The First Trial on Measuring Specific Gravity and Magnetic Susceptibility of Particulate Minerals by Use of Paramagnetic Liquids
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    Abstract:

    A technique employing paramagnetic liquids has been developed . for measuring the specific gravity of small particles. The method has been used to determine the specific gravity of mineral particles smaller than 0.09 mm. The measured specific gravity ranges even up to 21g/cm3 (Au).The main advantages of this method are: (1)The specific gravity of very small mineral particles can be measu- red; (2)The measurement is of wide range; (3)The operation is easy and simple. A dew method was reported in 1977, whereby specific gravity and magne- tic susceptibility of small particles might be measured by levitation in paramagnetic solutions in a nonhomogeneous magnetic field. The basis for its calculation is the ratio of the applied currents required for levitation of the particles to be measured to the same level and standard particles. But in our experiments we found that the measurement was not precise and it was hard- 1y used in practice because of the ferromagnetic characteristics and magnetic loss of electromagnet core. From the consideration of above we developed I- F curve in place of the original formula, and now we have got more satisfying results. In this paper the selection of the standard particles and paramagnetic liquids and our units for experiments are discussed.

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宁乃永,王桂荣,潘军,1985,应用顺磁性液体测量微小矿物比重和磁化系数的初步研究[J].岩石矿物学杂志,4(2):136~141.,1985,The First Trial on Measuring Specific Gravity and Magnetic Susceptibility of Particulate Minerals by Use of Paramagnetic Liquids[J]. Acta Petrologica et Mineralogica,4(2):136~141.

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