(北京科技大學(xué)固體電解質(zhì)冶金測(cè)試技術(shù)國(guó)家專(zhuān)業(yè)實(shí)驗(yàn)室，北京 100083)
摘 要: 以ZrO2(MgO)為固體電解質(zhì)、(MgO+MgFe2O4)為輔助電極材料組成的測(cè)定熔融高冰鎳中鐵含量的電化學(xué)傳感器，其電池式為：Mo, MoO2｜ZrO2(MgO)｜MgO+ MgFe2O4｜[Fe]matte, Mo。傳感器在鐵含量小于6.2%(質(zhì)量 )的范圍內(nèi)測(cè)得的數(shù)值與化學(xué)分析值基本一致。介紹了溫度在1483～1560K之間, 融體組成一定時(shí)，傳感器電動(dòng)勢(shì)與溫度的 關(guān)系，并據(jù)此得出了鐵活度系數(shù)與溫度的關(guān)系式，最后給出了由傳感器電動(dòng)勢(shì)計(jì)算高冰鎳中鐵的質(zhì)量百分含量的公式。
關(guān)鍵字: 鎳熔锍 鐵傳感器 固體電解質(zhì)
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Abstract:An electrochemical Fe sensor with ZrO2(MgO) solid electrolyte and (MgFe2O4+MgO) auxiliary electrode material as the following formula has been developed: Mo, MoO2｜ZrO2(MgO)｜MgFe2O4+MgO｜[Fe]matte, Mo. The performances and measuring range of the sensor in matte were studied. The calculating equations of activity, activity coefficient and content of Fe in nickel matte were obtained from experimental data. The sensor was submitted to control the blowing end-point of ferro in converter process. During such in-plant tests it was confirmed that the stability of the sensor is excellent and it facilitates more accurate control of Fe contents at the blowing end-point of nickel matte.
Key words: nickel matte Fe sensor solid electrolyte
