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    中南大學學報(自然科學版)

    Journal of Central South University

    第19卷    第1期    總第59期    1988年2月

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    黃鐵礦的半導體性質與可浮性的關系
    凌競宏1,胡熙庚2

    (1.礦物工程系
    2.中南工業大學
    )

    摘 要: 作者對產自三個不同類型礦床的黃鐵礦在某些調整劑作用條件下的浮選行為作試驗;并對黃鐵礦的半導體性質與可浮性的關系進行了探討。充氮氣的單泡浮選試驗結果表明,在適當的丁黃藥濃度下及在NaOH,CaO,FeSO4,Na2SO3和CuSO4等為調整劑的條件下,黃鐵礦的可浮性與半導體性質有密切關系。在抑制條件下,溫差電動勢率絕對值較大的p型黃鐵礦比n型黃鐵礦較難抑制。在活化條件下,溫差電動勢率絕對值較小的n型黃鐵礦可浮性最好。上述試驗及其結果已在中南礦冶學院學報1982年第4期發表。在本文中,作者提出了一個半導性影響礦物表面形成雙黃藥的電化學過程動力學的模型,利用這一模型,各種黃鐵礦可浮性的差異可得到較好的解釋。

     

    關鍵字: 黃鐵礦; 浮游性; 半導體化學; 半導體物理; 電化學動力學; 溫差; 電動勢; 表面態; 數學模型; 影響因素; 調整劑

    THE EFFECT OF THE SEMI--CONDUCTIVITY ON THE FLOTABILITY OF PYRITE
    凌競宏1,胡熙庚2

    1.礦物工程系
    2.中南工業大學

    Abstract:This paper deals with the flotation behavior of pyrites from three different types of mineral deposits in the presence of different modifiers and an investigation of the effect of the semi-conductivity on the flotability of pyrite. From the results of flotation experiments with the Hallimond tube and nitrogen- ated techniques, it is shown that under the conditions of suitable concentration of butyl xanthate and with NaOH, CaO, FeSO4, FeCl3, Na2SO3, and CuSO4 as modi- fiers, the flotabilities of pyrites are closely related to their semi-conductivities, i. e. under the depression conditions, the mineral particles with p-type semi-conductivity and greater absolute value of thermoelectric power are more difficult to depress than those with n-type conductivity but under the activation conditions, the mineral par- ticles with n-type semi-conductivity and less absolute value of thermoelectric power have the best flotabilities. The above-mentioned experiments and the experimental results were issued in J. of CSIMM, №.4, 1982. In this work, a simple working model is established, in terms of which differences in the flotation properties may be well illustrated by the influence of their semi-conductivities on the kinetics of the electrochemical processes of the formation of dixanthogen on the pyite surface or on the anionic xanthate adsorption.

     

    Key words: Pyrite; floatability; semiconductor chemistry; semiconductor physics; electrochemical kinetics; thermoelectricity; electromotive forces; surface states; mathematical models; influencing factors; modifier

    中南大學學報(自然科學版)
      ISSN 1672-7207
    CN 43-1426/N
    ZDXZAC
    中南大學學報(英文版)
      ISSN 2095-2899
    CN 43-1516/TB
    JCSTFT
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