Abstract
High-temperature melting was conducted for the vitrification treatment of recycled tailings from the copper-containing hazardous waste by doping SiO2 and heavy metal elements.The effects of several factors on the characteristics of the vitrification products were investigated,including melting time,the silicon acidity of raw materials,the Fe(Ⅱ)/TFe mass ration in the melt,and heavy metal content.The results indicate that when the melting temperature is 1350℃,the silicon acidity of raw materials is 2.00,and the melting time is 1.0 h,the vitrification products meet the requirements of the national standard GB/T 41015-2021.When the Fe(Ⅱ)/TFe ratio in the melt is 12.99%-37.33%,the acid leaching concentration of heavy metal elements in the vitrification products does not change significantly.When the Fe(Ⅱ)/TFe ratio exceeds 44.89%,the acid leaching concentrations of As,Cu,Ni,Cr,Mn,and Zn increase significantly.Meanwhile,when the content(w)of As,Cu,Ni,Cr,Mn,Zn,and Pb in the raw materials is 3.2%,2.0%,0.8%,2.0%,2.4%,1.6%,and 1.6%,respectively,the glass content in the vitrification products is 95.36%,and the acid leaching concentrations of each heavy metal element do not exceed the standard.The maximum allowable content(w)of As,Cu,Ni,Cr,Mn,Zn,and Pb in the vitrification products is approximately 3.03%,2.85%,1.66%,3.00%,2.62%,2.11%,and 1.93%,respectively.关键词
危险废物/玻璃化处理/高温熔融/无害化处置/酸浸出Key words
hazardous waste/vitrification treatment/high temperature melting/harmless disposal/acid leaching分类
资源环境
