(1. 東北大學(xué) 材料冶金學(xué)院，沈陽 110819；
2. 沈陽醫(yī)學(xué)院 基礎(chǔ)醫(yī)學(xué)院，沈陽 110034)
摘 要: 研究了硫酸氫銨焙燒高鈦渣的反應(yīng)動力學(xué)過程，考察鈦渣粒度、硫酸氫銨與鈦渣質(zhì)量比和焙燒溫度對反應(yīng)速率的影響，并對反應(yīng)機(jī)理進(jìn)行分析，建立了反應(yīng)動力學(xué)模型。結(jié)果表明：硫酸氫銨焙燒高鈦渣提取二氧化鈦的動力學(xué)過程符合收縮未反應(yīng)核模型，反應(yīng)速率受化學(xué)反應(yīng)控制，并由阿羅尼烏斯方程得到焙燒反應(yīng)的表觀活化能為87.95 kJ/mol。
關(guān)鍵字: 高鈦渣；硫酸氫銨；焙燒；動力學(xué)
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;
2. School of Basic Medical Science, Shenyang Medical College, Shenyang 110034, China）
Abstract:The reaction kinetics of roasting high titanium slag with ammonium bisulfate was studied. The effects of roasting temperature, particle size and NH4HSO4-to-ore mass ratio on the roasting reaction rate were investigated. The mechanisms of the reaction were analyzed, and a model of the reaction kinetics was given. The results show that the roasting process can be modeled with the shrinking core model and the reaction rate is controlled by chemical reaction. According to the Arrhenius expression, the apparent activation energy of the roasting reaction is 87.95 kJ/mol.
Key words: high titanium slag; ammonium bisulfate; roasting; kinetics
