CaF_2渣系失重与成分变化的试验研究

Experimental Study on Weight Loss and Compositional Variations of Slag System Bearing CaF_2

针对ANF-6渣应用过程演化而成的CaF2-CaO-Al2O3-SiO2-MgO渣系,通过测定炉渣的失重量,建立二次回归正交设计模型,借此研究了熔渣的失重率与CaF2、CaO、Al2O3、SiO2和MgO含量的关系。结果表明:w(CaF2)由50%增加到65%,失重率大约升高6%,而且在相同的试验条件下,SiO2、Al2O3和MgO均可提高渣系的失重率,但随之CaO含量的增加,熔渣的失重率降低。此外,CaF2-Al2O3-CaO-SiO2-MgO渣系在熔点附近由于渣系中氧化物与氟化物发生反应,造成炉渣急剧失重,导致氟化钙渣系成分不断发生变化。

The relationship between the content of CaF2,CaO,Al2O3,SiO2,MgO and the weight loss was investigated by measuring weight loss rate of CaF2-CaO-Al2O3-SiO2-MgO slag system originated from ANF-6.The method of quadratic regression orthogonal design was used for the test and analysis.The experimental results show that weight loss rate of the slag can be increased by 6% with CaF2 changing from 50% to 65%,and in the same experiment weight loss increases with SiO2,Al2O3 and MgO adding and decreases with CaO content increasing.In addition,CaF2-Al2O3-CaO-SiO2-MgO slag system will undergo apparent weight loss near by melting point because of the reaction between oxide and fluoride in the slag pool.This will result in the obviously composition change of CaF2 based slag.