覆铜板废边角料熔炼渣熔化温度研究

Research of melting temperature of the smelting slag of copper clad laminate scrap

覆铜板废边角料是一种具有明显“高硼低铁”特征的电子废料,为使覆铜板废边角料冶炼过程中具有合适的熔化温度,采用化学试剂配置合成了17组“高硼低铁”渣,利用RDS-2010型智能测试仪通过半球熔点法测定其熔点。对所测得数据进行了多元非线性回归分析,得到了熔化温度与熔炼渣化学组成之间的数学表达式,基于回归方程考察了FeO含量(w(Feo))、Fe3O4含量(w(Fe3O4))、Al2O3含量(w(Al2O3))、B2O3含量(w(B2O3))及钙硅比(m(Cao)/m(SiO2))单一组分变化对熔炼渣熔点的影响规律。结果表明,回归方程预测值与实际值吻合度较高;熔化温度在熔渣组成成分范围内低于1100℃,具有良好的冶炼性能;熔渣的熔化温度随着w(Fe3O4)、w(Al2O3)的增加而升高,随着w(Feo)、w(B2O3)、m(Cao)/m(SiO2)的增加而下降。研究结果为电子废料的绿色回收提供数据支持。

Copper clad laminate scrap(CCLS)is a kind of electronic waste containing low iron and high boron.To get suitable melting temperature property for CCLS recycling process,17 groups of slag samples were prepared by some chemical reagents,and the slag melting temperatures were measured using a RDS-2010 type intelligent test instrument for ash melting point by means of hemisphere point.Then,the mathematical formula between the melting temperature and the chemical composition of smelting slag were acquired by means of nonlinear regression analysis.The effects of the FeO content(w(Feo)),Fe3O4 content(w(Fe3O4)),Al2O3 content(w(Al2O3)),B2O3 content(w(B2O3)),CaO/SiO2 ratio(m(Cao)/m(SiO2))on the slag melting temperatures were also studied based on regression equation.Results show that the melting temperatures calculated by the regression formula reproduce the experimental data in molten slag with high precision.The melting temperatures of CCLS smelting slag with high boron and low iron are less than1100°C with good melting property.The slag melting temperature ascends with increasing and,but descends with increasing,and.Especially,each factor has a significant effect on the slag melting temperature.The research results provide data support for green recycling of electronic waste.