铁尾矿与采剥废石基多孔陶瓷复合相变储能材料的制备与表征  

Preparation and characterization of porous ceramic matrix for composite phase change energy storage materials using iron tailings and mining-stripping waste rock

作　　者：蒋骞 潘大伟 艾天[1] 全艳玲[1] 回进 Jiang Qian;Pan Dawei;Ai Tian;Quan Yanling;Hui Jin(College of Chemical Engineering,University of Science and Technology Liaoning,Anshan Liaoning 114000,China;Ansteel Group Mining Corporation Limited,Anshan Liaoning 114000,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114000 [2]鞍钢集团矿业有限公司,辽宁鞍山114000

出　　处：《化工矿物与加工》2023年第5期24-31,共8页Industrial Minerals & Processing

摘　　要：将铁尾矿与采剥废石制成的多孔陶瓷作为相变储能材料基体,同时将熔融石蜡、石墨、石墨烯混合搅拌30 min作为相变材料,最后采用熔融真空压注法将相变材料注入相变储能材料基体得到一种铁尾矿与采剥废石基多孔陶瓷复合相变储能材料(IT-WR@SCY/PCMs)。通过抗压、耐酸碱性和热导率测试及热循环试验等对IT-WR@SCY/PCMs的力学和物理化学性质进行了研究,并采用扫描电子显微镜(SEM)、差热-热重分析仪(DSC-TG)等对IT-WR@SCY/PCMs的微观结构进行了表征,结果表明:5种配比下IT-WR@SCY/PCMs的平均抗压强度为14.73 MPa;在微沸酸碱溶液中浸泡2.5 h的平均质量损失率分别为5.9%和2.4%;相较于石蜡,添加20%石墨和20%石墨烯的复合相变储能材料(IT-WR@SCY/GPCPCMs20和IT-WR@SCY/GCPCMs20)的导热率分别提高了120.83%、266.67%,为0.53、0.88 W/(m·K),相变潜热分别损失了44.50%、27.09%,为126.22、165.92 J/g;经100次熔化-凝固热循环后,IT-WR@SCY/PCMs的质量损失率仅为0.621%。IT-WR@SCY/PCMs的物理强度高,储热性能稳定,具有较长的使用寿命,在军事伪装、建筑节能等领域具有广阔的应用前景。Porous ceramics prepared from iron tailings and mining and stripping waste rock were used as phase change energy storage base material.Meanwhile,molten paraffin,graphite and graphene were mixed and stirred for 30 minutes to prepare phase change materials.Finally,the phase change materials was injected into the matrix of phase change energy storage material by molten vacuum pressure injection method to obtain a kind of multi-pore ceramic composite phase change energy storage material using iron tailings and mining-stripping waste rock(IT-WR@SCY/PCMs).The mechanical and physicochemical properties of IT-WR@SCY/PCMs were researched by performing compressive test,acid and alkali resistance test,thermal conductivity test and heat cycle test,and microstructures of IT-WR@SCY/PCMs were characterized by scanning electron microscope(SEM)and differential thermal gravimetric analyzer(DSC-TG).The results showed that the average compressive strength of IT-WR@SCY/PCMs reached 14.73 MPa,and the mass loss was 5.9%and 2.4%after immersed for 2.5 h in the slightly boiling acid and base solution,respectively.Compared with paraffin wax,the thermal conductivity of composite phase change energy storage mate-rials with 20%graphite and 20%graphene(IT-WR@SCY/GPCPCMs20 and IT-WR@SCY/GCPCMs20)increased by 120.83%and 266.67%,respectively,reaching 0.53 W/(m·K)and 0.88 W/(m·K),and the latent heat loss of phase change was 44.50%and 27.09%,respectively,reaching 126.22 J/g and 165.92 J/g.After 100 cycles of melting and freezing heat cycle,the mass loss of IT-WR@SCY/PCMs was only 0.621%,which indicates that IT-WR@SCY/PCMs has high physical strength,stable heat storage performance and long service life,and expected to be used extensively in military camouflage,building energy conservation and other fields.

关 键 词：铁尾矿 采剥废石 相变材料 多孔陶瓷复合相变储能材料 制备与表征 

分 类 号：TD981[矿业工程—选矿] TB34[一般工业技术—材料科学与工程]