基于浮选法的退役光伏组件中玻璃回收试验研究OA

With the large-scale decommissioning of photovoltaic modules,the realization of efficient,low-cost and green recycling of photovoltaic modules has become an urgent need for the photovoltaic industry.Glass is the main component of photovoltaic modules and the core object of recycling.In this paper,a combined process of positive and negative flotation was developed using retired crystalline silicon photovoltaic panels as raw materials.The effects of reagent type,flotation pH,reagent dosage and flotation time on the glass recovery rate in photovoltaic modules were investigated.The results show that Kerosene is used as reverse flotation reagent for heterochromatic particles,the recovery effect is the best when the dosage of kerosene is 840 g/t,and the removal rate of different color particles is 90.48%.Ether monoamine is used as positive flotation glass reagent,the recovery rate of glass is 92.36%when the dosage of ether monoamine is 100 g/t.After direct and reverse flotation,the removal rate of heterochromatic particles was 89.11%,and the recovery rate of glass is 95.24%.The infrared spectrum analysis showed that the ether mono-amine had chemical adsorption on the glass surface,and its N-H bond,-CH2 bond and C=C bond formed specific binding with the hydroxyl(-OH)and silicon oxygen bond(Si-O)on the glass surface,which explained the mecha-nism of flotation efficiency improvement at the molecular level and provided a theoretical basis for the efficient recovery of retired photovoltaic modules.