Research On The Characterization Mechanism Of Sawnability Of Natural Granite And Its Associated Modeling With Environmental Impact Indicators

With the rapid development of China's economy and the acceleration of urbanization,the demand for facing stone materials is increasing day by day.With the rapid development of facing stone industry,a series of environmental problems,such as high energy consumption,large amount of sewage and solid waste,have been caused.In facing stone,the processing difficulty of granite is higher than that of marble,and the negative environmental impact of the processing process is also greater.In order to deal with the environmental impact of granite processing,a series of clean production technologies have emerged in the field of granite processing,such as ultra-thin circular saw blade technology,sewage treatment and recycling technology and solid waste recycling technology.Reasonable clean technology planning is the key to the implementation of clean production mode in granite processing enterprises.However,due to the lack of environmental impact index prediction method as the basis for the introduction and planning of cleaner production technology,it is often difficult for enterprise decision makers to determine the specifications,quantity and operation parameters of cleaner production technology and equipment scientifically.The purpose of this study is to establish the sawability characterization mechanism of granite,to characterize sawability with a standard and unified measurement value,and to study the relationship between sawability and environmental impact indicators.The correlation model can predict the environmental impact index based on the sawability of granite,and lay a scientific foundation for stone processing enterprises to carry out clean technology planning.Firstly,the evaluation index system of sawability of granite is constructed.Based on the collection,sorting and clustering of the sawability evaluation parameters used in previous studies,the sawability evaluation indexes reflecting the characteristics of granite are extracted,and the sawability evaluation index system is constructed.Secondly,a sawability representation mechanism based on multi attribute decision making(MADM)is constructed.The mechanism includes evaluation index weighting model and sawability quantification system.The sawability characterization mechanism can determine the weight of each evaluation index through the index weighting model,and use the sawability quantitative system to characterize the sawability of granite with standard and unified measurement"SG_c value".Thirdly,the concept of sawability function of granite is proposed.Based on the theory of experimental design(DOE)and the characterization mechanism of sawability of granite,the construction method of sawability function of granite is studied.By using the sawability function of granite,the"SG_c value"of sawability of a certain kind of granite can be obtained only by using some index values of sawability.The sawability function improves the operability and applicability of the characterization method for the sawability of granite.Finally,the correlation model between"SG_c value"of sawability and environmental impact index value of granite is constructed by numerical fitting method.The uncertainty analysis method for numerical fitting process is studied,and the reliability of correlation model is determined.The above methods have been applied in a stone industry park in Shandong Province:the prediction of energy consumption,water consumption and solid waste production of a granite processing enterprise has been realized by using the correlation model,and the number,specification and performance(capacity)parameters of the enterprise's cleaner production technology and equipment have been determined based on the decision results.The practical application shows that the model can provide scientific basis for the planning of cleaner production technology of granite processing enterprises and industrial parks.