Due to the lack of mature large-scale industrial disposal technology,a large amount of coal gasification fine ash has caused seri-ous environmental pollution and resource waste.The treatment of coal gasification fine ash by fluidization melting can realize the separation of carbon and ash,and the modification and improvement of ash,so that ash can be transformed into glass phase slag rich in silicon and aluminum elements.Because of its special glassy interwoven structure,porous glass-ceramics have good mechanical properties and thermal insulation properties,so the idea of high value utilization of molten slag to prepare porous glass-ceramics was established.The effects of pre-curing time and sintering temperature on crystallization characteristics,pore structure and compressive strength of porous glass-ce-ramics were studied.The results show that the crystallization characteristics and pore structure of porous glass-ceramics are related to sin-tering temperature and pre-curing time.The higher sintering temperature can promote the crystal phase precipitation in the sintering process and strengthen the compressive strength of the porous glass-ceramics.The pre-curing time affects the network structure of the por-ous-glass embryo,resulting in different resistance to be overcome during crystal precipitation,which affects the type of crystal phase.When the pre-curing time is 30 min,the large pore size of the porous-glass embryo is easy to collapse during the process of sintering and crystallization.The compressive strength decreases with the increase of porosity and decreases nonlinearly with the increase of pore size.When the pre-curing time is 90 min,a good pore structure can be obtained.The compressive strength is influenced by the crystalli-zation characteristics and the pore structure characteristics.When the sintering temperature is 900℃,the compressive strength can be strengthened,especially when the pre-curing time is 90 min,the compressive strength of the porous glass-ceramics is 3.77 MPa.At 700℃and 800℃,whether the compressive strength increases is related to the pre-curing time.When the pre-curing time is 60 min and the sintering temperature is 900℃,a large number of crystals are precipitated,the porosity is 66.20%,the pore size is evenly distribu-ted,and the compressive strength is 1.40 MPa.
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