Research On Effective Engery-saving Of Sintering Product With Fly Ash And Shale

Along with building a well-off society step by step, the rapid development of construction, Chinese resources and energies are excessively consumed, such as wall security issues are also increasingly prominent. So this paper aims to use of industrial solid waste and develop effective engery-saving sintered products for providing technical support of the national building energy conservation and circular economy, which is from the sub-project of the national technology support program of China (project No.2006BAF02A29, named Green Manufacturing Processing Technology and Equipment of New Style Wall Material), Green Manufacturing Technology and Equipment of New Style Self-heat Insulation and Load-bearing Sintered Product.The effects of different mechanism pore-forming agents on the properties of fly-ash sintered products show that:when doping pore-forming agents into fly-ash sintering products, firing shrinkages were repressed, water absorption and apparent porosity rate were varying increased, volume density and compressive strength reduced accordingly. Specimens that prepared by doping into internal-burning material S or thermal decomposition material L as a pore-forming agent, had a more than 50% loss rate of compressive strength, which of the other specimens aiso lower 8-12MPa. The evolutions of volume density and compressive strength were similar, volume density of specimens that prepared by doping into a pore-forming agent L or S had the largest decrease, reach to 0.2-0.3 g·cm-3. The evolutions of apparent porosity rate and water absorption were opposite to volume density and compressive strength, apparent porosity rate of specimens that prepared by doping into a pore-forming agent L or S had a large increase, reach to 5%-10%, moreover, increasing with contents of the pore-forming agent L, apparent porosity rate of specimens gradually lifted. Specimens that prepared by doping into a pore-forming agent had a low thermal conductivity and excellent heat-insulating properties, among fly-ash sintering products, the specimen prepared by doping into a pore-forming agent L had the best heat-insulating properties, the specimen prepared by doping into a pore-forming agent S was better than others.Specimens prepared by doping into complex pore-forming agents M and Z had a higher compressive strength than that prepared by doping into a pore-forming agents M or Z, but water absorption, apparent porosity rate and volume density changed a little, firing shrinkages were raised with contents of the pore-forming agent M increasing.Analysis of SEM indicates that doping pore-forming agents into sintered products would make specimens loose and porous. Fire conditions of specimens prepared by doping into a pore-forming agents M or Z were better than sample 0, sample 0 better than specimens prepared by doping into a pore-forming agent P or S. There were many flocculent materials on the surface of particles and uniform pores inside specimens prepared by doping into a pore-forming agent L.The effects of different characteristic orifices on the thermal properties of sintered products show that:Germany Poroton products met building energy conservation 65% designing standards in Beijing. Heat transfer coefficients of DM-type and KP-type shale sintered perforated bricks which produced from Chenlong building materials co., ltd in Qinhuangdao were more than 0.6 W/m2-K, that were far away to reach building energy conservation 65% designing standards in Beijing. When sintered products were more or less alike in si2e and void ratio, heat transfer coefficients were cut down with models got more symmetrical, but declines were limited. When sintered products were alike in size and partition wall thickness, heat transfer coefficients were raised with perforated rows and columns were increased in the direction of heat flows, and rates of increase were larger than before. When sintered products were alike in size and perforated ranks, heat transfer coefficients were raised with partition wall thickness was increased in the direction of heat flows, and rates of increase were large.Thermal performances of model M and P, which had the more than 35% of void ratio and less than 0.6 W/m2-K of thermal conductivity, met building energy conservation 65% designing standards in Beijing. However, model M that reduced the heat transfer coefficient by shrinking partition wall thickness demanded superior raw materials and installations; model P that reduced the heat transfer coefficient by enlarging the size raised the weight and thickness of walls correlatively.