鉻氧化物間的氧化還原平衡
(1.東北大學(xué) 材料與冶金學(xué)院， 沈陽(yáng) 110004；
2.沈陽(yáng)市煤氣總公司， 沈陽(yáng) 110015)
摘 要: 采用化學(xué)平衡法研究了1673和1773K下CaO-SiO2-Al2O3-MgO-Na2O-CrOx渣系中鉻氧化物間的氧化還原平衡。在實(shí)驗(yàn)條件下， 渣中鉻氧化物主要以Cr2+形式存在。 lg［x(Cr2+)/x(Cr3+)］與-lgp(O2)呈線(xiàn)性關(guān)系，斜率在1/4左右， 與理論分析相符。 x(Cr2+)/x(Cr3+)隨堿度的增加而減小，隨氧分壓的降低、 溫度升高和鉻氧化物總量的增加而增大。
關(guān)鍵字: 鉻渣; 鉻氧化物; 氧化還原平衡
molten slags
CHEN Ren1, CUI Zhi-ying2
（1.School of Materials and Metallurgy, Northeastern University,
Shenyang 110004, China;
2. Shenyang Central Gas Company,Shenyang 110015, China）
Abstract:The redox equilibrium between the chromium oxides in CaO-SiO2-Al2O3-MgO-Na2O-CrOx molten slags was studied by means of chemical equilibrium method at 1673 and 1773K.The experimental results show that under the present experimental conditions, the chromium oxides exist mainly in the form of Cr2+ in the slags. lg［（x(Cr2+)/x(Cr3+）］is linear with -lgp(O2) and the slope is around 1/4, which is corresponding to the theoretical analysis. x(Cr2+)/x(Cr3+)decreases with the increment of basicity of slag and oxygen partial pressure, while increases with the increment of temperature and total content of chromium oxides.
Key words: slag containing chromium; chromium oxides; redox equilibrium
