矿产综合利用2024，Vol.45Issue(2)：23-29,7.DOI:10.3969/j.issn.1000-6532.2024.02.004
磷石膏热处理制备免烧建材
Preparation of No Burning Building Materials by Phosphogypsum Heat Treatment
摘要
Abstract
This is an article in the field of ceramics and composites.Phosphogypsum has a large discharge and low utilization rate,and resource utilization is imminent.The heat treatment of phosphogypsum under different temperatures was studied.The influence of heat treatment temperature on the physical phase and microstructure of phosphogypsum,and the compressive strength,phase and microstructure of non burningsample of building materials by the treated phosphogypsum were studied.The results show that with the increase of heat treatment temperature,the crystallinity of gypsum increases and the crystal form changes.After heat treatment at 80 ℃,the crystal of gypsum is dense,and part of it is converted into hemihydrate gypsum.The Gypsum dihydrate formed by hydration recrystallization of hemihydrate gypsum fills the void,forming the internal microstructure of dense and mutual bonding of crystals,so the compressive strength of no burning building materials is greatly improved.After curing for 7 days and 28 days,the compressive strength of non burningsample(the mass ratio of phosphogypsum to cement is 4∶1)reaches 36.45 MPa and 38.12 MPa.The compressive strength of the sample soaked in water for 24 hours is still 21.03 MPa.关键词
陶瓷及复合材料/磷石膏/热处理/抗压强度/高掺量Key words
Ceramics and composites/Phosphogypsum/Heat treatment/Compressive strength/High content分类
矿业与冶金引用本文复制引用
李明东,付得进,勾碧波,王家伟,王海峰..磷石膏热处理制备免烧建材[J].矿产综合利用,2024,45(2):23-29,7.基金项目
国家自然科学基金(51764006、51764012) （51764006、51764012）
贵州省科学合作计划项目([2016]5302、[2017]5788、[2018]5781、[2019]1411、[2019]2841) （[2016]5302、[2017]5788、[2018]5781、[2019]1411、[2019]2841）
