| In order to cope with the problems of global warming and serious shortage of various resources,China proposed the "carbon peak" and "carbon neutral" policies,which will push how to effectively reduce carbon emissions to a new height in history.As a pillar industry of people’s lives,chemical industry,the high carbon emissions caused by high energy consumption and high pollution cannot be underestimated.In this paper,the method of life cycle analysis(LCA)combined with life cycle cost analysis(LCC)is applied to the field of chemical products recycling,and recycled copper wire and recycled ABS plastic are used as typical chemical products to analyze and explore their environmental impact and economic performance.Analyzing the results and carrying out specific optimization process experiments to lay a theoretical and technical foundation for the carbon reduction action of chemical products.The main research contents of this paper are as follows:(1)For waste copper wires,there is no obvious difference in performance between recycled copper wires and primary copper wires,meaning the great potential of recycling them.Using the LCA combined with LCC approach,environmental and economic assessments are carried out for each unit of the regeneration process.The research results show that the energy consumption of the upwards-casting method is as high as 56 % due to the complex process,which is the main source of environmental pollution.The reverberatory furnace refining unit has become the main contributor to the new added cost due to its high cost of auxiliary materials and fuel.Based on the above research data,the law of the evolution of copper value over time was obtained by means of mathematical function simulation.In the process,the influence of the fast-selling model and the fluctuation of scrap copper price on the evolution law was considered.On basis of calculation,the experiment was designed to optimize the regeneration process,and the electrolytic refining method was used to replace the three-stage method for producing recycled electrolytic copper.The final precipitated product had a dense and flat structure.The LCA results showed that the optimization of the process can effectively reduce the 48.15 % carbon emissions and 36.02 % energy consumption.This study can provide theoretical guidance for the sustainable development,process optimization,environmental evaluation and economic value evaluation of copper industry.(2)For waste ABS plastic,experiments have been designed to explore the relationship between the performance of ABS mixture and the number of extrusions and the content of recycled materials.With the increase of extrusion times,the performance of the material decreases significantly.The ratio of using new materials to improve the performance of recycled materials is more than 50 %.The thermal aging model of ABS recycled material under different proportions has been established to predict that the content of recycled material(below 60 %).When working under the condition of lower than 35 ℃,the service life of recycled ABS will be more than 11 years.Therefore,comprehensively mixing proportion ratio of 50 % was established.Using recycled ABS plastic as printer casing,the method of LCA combined with LCC is also used to explore the environmental and economic impact of this process.The change of the product value is simulated to provide theoretical guidance for cost control and environmental emissions. |
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