有色金属科学与工程
有色金屬科學與工程
유색금속과학여공정
JIANGXI NONFERROUS METALS
2014年
2期
39-43
,共5页
电炉渣%氯化铵溶液%浸出%自阻系数%动力学模型
電爐渣%氯化銨溶液%浸齣%自阻繫數%動力學模型
전로사%록화안용액%침출%자조계수%동역학모형
EAF slag%NH4Cl solution%leaching%self-resistance coefficient%kinetic model
针对电炉渣在NH4Cl溶液中的浸出过程，重点研究了电炉渣粒径、浸出温度、浸出时间和NH4Cl浓度对Ca2+浸出率的影响规律，并建立了带有自阻系数的反应过程动力学模型.结果表明，电炉渣中钙离子的转化率随着浸出温度和氯化铵浓度的增大而增大，浸出反应过程的自阻系数为1.0307~1.0617，反应过程的活化能约为15.046 kJ/mol，表明该实验条件下电炉渣在氯化铵溶液中的浸出反应过程控速机制为扩散控速.
針對電爐渣在NH4Cl溶液中的浸齣過程，重點研究瞭電爐渣粒徑、浸齣溫度、浸齣時間和NH4Cl濃度對Ca2+浸齣率的影響規律，併建立瞭帶有自阻繫數的反應過程動力學模型.結果錶明，電爐渣中鈣離子的轉化率隨著浸齣溫度和氯化銨濃度的增大而增大，浸齣反應過程的自阻繫數為1.0307~1.0617，反應過程的活化能約為15.046 kJ/mol，錶明該實驗條件下電爐渣在氯化銨溶液中的浸齣反應過程控速機製為擴散控速.
침대전로사재NH4Cl용액중적침출과정，중점연구료전로사립경、침출온도、침출시간화NH4Cl농도대Ca2+침출솔적영향규률，병건립료대유자조계수적반응과정동역학모형.결과표명，전로사중개리자적전화솔수착침출온도화록화안농도적증대이증대，침출반응과정적자조계수위1.0307~1.0617，반응과정적활화능약위15.046 kJ/mol，표명해실험조건하전로사재록화안용액중적침출반응과정공속궤제위확산공속.
Aiming at the leaching process of NH4Cl solution in EAF slag, the influence rule of the particle size and leaching temperature and time,as well as NH4Cl concentration on leaching rate of Ca2+ are studied, and leaching kinetics model with self-resistance factor is established. Results show that the conversion rate of element calcium increases both with the increase of the leaching temperature and NH 4Cl concentration. The self-resistance factor for leaching process is in the range of 1.030 7 and 1.061 7 and the activation energy of leaching reactions is about 15.046 kJ/mol which indicates that solid membrane diffusion limits EAF slag leaching process under the experimental condition.
