【摘要】 以铬渣为主要原料采用熔融法制备了性能良好的微晶玻璃.运用XRD研究了材料的晶相组成,采用二苯碳酰二胼分光光度法测定了样品中残留Cr6+的含量.结果表明,当铬渣质量分数为40%和45%时,微晶玻璃中主晶相为镁铬尖晶石(MgCr2O4)、透辉石(CaMg(SiO3)2)和普通辉石(Ca(Mg,Fe)Si2O6);当铬渣质量分数增加到50%时,主晶相为黄长石类晶体;铬渣质量分数不超过50%时,微晶玻璃中残留Cr6+含量为0~0.4mg/L,低于0.5mg/L的国家排放标准.更多还原

【Abstract】 A glass-ceramics was prepared with melt quenching technology using chromium slag as the major material. Phase compositions of the glass-ceramics were investigated with X-ray diffraction. The concentration of residual Cr⁶⁺ ion in the specimens was determined with diphenylcarbazide （DPC） spectrophotom. Experiment results showed that, when the content of chromium slag was 40wt% and 45 wt%, the major crystalline phases were magnesiochromite （MgCr₂O₄）, diopside （CaM（SiO）₃）₂) and augite （Ca（Mg,Fe）Si₂O₆）. When the content of chromium slag increased to 50wt%, the major crystalline changed to melilite. When the content of chromium slag was less than 50wt%, the residual Cr⁶⁺ ion in the glass-ceramics was 0～0.4 mg/L, which was less than the national standard of 0.5 mg/L for emission.更多还原