煤矸石制备发泡陶瓷的性能研究  

Properties of foamed ceramics prepared from coal gangue

作　　者：嵇鹰[1] 王瑞琦 朱刚 李恩尧 代晨阳 沙倩倩 Ji Ying;Wang Ruiqi;Zhu Gang;Li Enyao;Dai Chenyang;Sha Qianqian(School of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi’an 710055,Shaanxi,China;不详)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]中国建筑材料工业建设西安工程有限公司,陕西西安710075

出　　处：《耐火材料》2024年第6期461-467,共7页Refractories

基　　金：陕西省重点研发计划(2019TSLGY05-04)资助。

摘　　要：为高附加值资源化利用煤矸石和钢渣,以煤矸石为主要原料,钢渣为辅助原料,加入适量的助熔型原料滑石和钾长石及发泡剂碳化硅制备发泡陶瓷。研究钢渣掺量(等量取代煤矸石,质量分数依次为5%、10%、15%、20%、25%、30%、35%)和助熔型原料[固定滑石和钾长石的合量为20%(w),滑石等量取代钾长石,设计掺量(w)依次为0、5%、10%、15%、20%]对发泡陶瓷物理性能、显微结构、物相组成的影响。结果表明:1)随着钢渣掺量的增加,构成骨架结构的SiO_(2)含量降低,CaO、MgO等氧化物含量上升,黏度下降,过高的钢渣掺量因SiO_(2)含量过低而不利于形成大小适中、分布均匀的气孔,钢渣掺量(w)不宜超过30%。2)滑石和钾长石助熔型原料对发泡陶瓷的影响主要是改变了原料中碱金属氧化物和构成陶瓷骨架的Al_(2)O_(3)和SiO_(2)的含量。3)发泡陶瓷的最佳配比为:m(煤矸石)∶m(钢渣)∶m(钾长石)∶m(滑石)=50∶30∶10∶10,外掺0.1%(w)的SiC。In order to utilize coal gangue and steel slag with high added value,foamed ceramics were prepared using coal gangue as the main starting material,and steel slag as the auxiliary starting material,adding appropriate amounts of flux(talc and potassium feldspar) and foaming agent silicon carbide.The effects of the steel slag addition(equivalent replacement of coal gangue,5%,10%,15%,20%,25%,30%,and 35%,by mass) and flux addition(fixing the total addition of talc and potassium feldspar at 20 mass%,replacing potassium feldspar with talc in the equal amount of 0,5%,10%,15%,and 20%,by mass) on the physical properties,microstructure and phase composition of the foamed ceramics were studied.The results show that:(1)with the increasing steel slag addition,the SiO_(2) content in the skeleton structure decreases,the content of CaO,MgO and other oxides increases,and the viscosity decreases;excessive steel slag is not conducive to the formation of moderate-size and uniformly distributed pores due to the low SiO_(2) content;the steel slag addition shall not exceed 30%;(2)the influence of talc and potassium feldspar flux on the foamed ceramics is mainly to change the contents of alkali metal oxides,as well as Al_(2)O_(3) and SiO_(2) which constitute the ceramic skeleton;(3)the optimal foamed ceramic formulation is:m(coal gangue)∶m(steel slag)∶m(potassium feldspar)∶m(talc)=50∶30∶10∶10,extra-adding 0.1 mass% SiC.

关 键 词：煤矸石 钢渣 发泡陶瓷 物理性能 

分 类 号：TQ174[化学工程—陶瓷工业]