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The Comparative Study on the Life Cycle Assessment of Calcium Carbide Sludge and Limestone Cement

Author: WangChao
Tutor: ZhangJianQiang
School: Southwest Jiaotong University
Course: Environmental Engineering
Keywords: Cement Carbide slag Limestone Life Cycle Assessment (LCA) Environmental load
CLC: TQ172
Type: Master's thesis
Year: 2007
Downloads: 368
Quote: 10
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Abstract


With the further development of the cement industry, non-renewable resources and energy consumption, emissions and dust emissions, caused serious damage to the environment has affected the sustainable development of the industry as a whole. \Firstly the environment evaluation system of the the cement product life cycle, and then the production of electricity to a cement enterprises in Sichuan Province carbide slag cement and limestone cement as the research object, respectively, made the the pollution list of data of both life cycle, the application of the definition of the LCA on the environment the evaluation of the boundary conditions, the indicator method, determination of research and analysis of the system, and then from the consumption of resources, human health and ecological and environmental impact to make a qualitative and quantitative assessment of the environmental impact of both. After the environmental impact categories, characterization, standardization work, using AHP weighted evaluation of the environmental impact of both been both within the life cycle environmental load. The main conclusions drawn by the study are: carbide slag cement and limestone cement unit functional product life cycle environmental load of of 1.05 × -10 / a and 1.41 × 10 -10 / a, former environmental load decreased by 25.53%, the reduction rate of the respective indicators: ADP: 32.00%: EDP: 25.65%; GWP: 24.40%; AP: 16.67%: NP: 13.33%: HT: 18.39 % reduction in order: ADP> EDP> GWP> HT> AP> NP, and therefore visible carbide slag cement can effectively reduce non-renewable resource depletion of non-renewable energy consumption and the greenhouse effect. In addition, the study also analyzed: the main pollutants producing stage in the the cement product life cycle for the resources and energy production stage and cement manufacturing stage; major polluting emissions CO 2 and dust, followed by SO < sub> 2 : a major environmental impact type of non-renewable energy loss and damage to human health and the greenhouse effect. The cement product improvement of the environmental performance of the key is to improve energy efficiency and reduce the amount of carbonate feedstock and improvement of industrial combustion technology. Simply reduce coal consumption and greatly improve the power consumption does not fundamentally improve the environmental performance of cement products, but pollution from cement manufacturing stage to be passed on to the electricity production stage of cement production stage. The paper systematically analyze, compare and evaluate the environmental impact of carbide slag cement and limestone cement, which has important practical significance to promote China's waste recycling, improve the environmental behavior of the cement production process, but also for the future ecological cement The design and evaluation methods and evaluation criteria for the establishment of a technical draw.

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CLC: > Industrial Technology > Chemical Industry > Silicate > Cement Industry
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