非金属矿
非金屬礦
비금속광
Non-Metallic Mines
2015年
5期
17-20
,共4页
胡志波%郑水林%赵成博%演阳%孙志明%尹胜男
鬍誌波%鄭水林%趙成博%縯暘%孫誌明%尹勝男
호지파%정수림%조성박%연양%손지명%윤성남
硅藻土%煅烧%孔结构%调湿性能
硅藻土%煅燒%孔結構%調濕性能
규조토%단소%공결구%조습성능
diatomite%calcination%pore structure%humidity controlling performance
以临江选矿硅藻精土为原料,分别在600℃、800℃、1000℃下煅烧2 h,采用静态法在20℃恒温下将未煅烧硅藻土和不同煅烧温度硅藻土置于相对湿度98%和11%的恒湿环境中进行吸放湿试验,采用X射线衍射对调湿样品进行表征,同时采用低温氮吸附法与压汞法测试样品的孔结构特性。结果表明,孔结构特性是影响硅藻土调湿性能的重要因素,微孔和介孔在调湿过程中起主导作用,硅藻土的比表面积越大、微孔和介孔的孔体积越大、孔径越小,则其平衡吸湿量和平衡放湿量越大,调湿性能越强。
以臨江選礦硅藻精土為原料,分彆在600℃、800℃、1000℃下煅燒2 h,採用靜態法在20℃恆溫下將未煅燒硅藻土和不同煅燒溫度硅藻土置于相對濕度98%和11%的恆濕環境中進行吸放濕試驗,採用X射線衍射對調濕樣品進行錶徵,同時採用低溫氮吸附法與壓汞法測試樣品的孔結構特性。結果錶明,孔結構特性是影響硅藻土調濕性能的重要因素,微孔和介孔在調濕過程中起主導作用,硅藻土的比錶麵積越大、微孔和介孔的孔體積越大、孔徑越小,則其平衡吸濕量和平衡放濕量越大,調濕性能越彊。
이림강선광규조정토위원료,분별재600℃、800℃、1000℃하단소2 h,채용정태법재20℃항온하장미단소규조토화불동단소온도규조토치우상대습도98%화11%적항습배경중진행흡방습시험,채용X사선연사대조습양품진행표정,동시채용저온담흡부법여압홍법측시양품적공결구특성。결과표명,공결구특성시영향규조토조습성능적중요인소,미공화개공재조습과정중기주도작용,규조토적비표면적월대、미공화개공적공체적월대、공경월소,칙기평형흡습량화평형방습량월대,조습성능월강。
The Linjiang puriifed diatomite was used as humidity controlling material after calcination processing under the temperature of 600℃, 800℃ and 1000℃ for 2 h. The humidity controlling experiment of uncalcined diatomite and calcined diatomite were conducted by static method under isothermal and constant humidity conditions which the temperature was 20℃ and the relative humidity was 98% and 11%. Meanwhile, the humidity controlling samples were characterized by XRD, and the pore structure characteristic was analyzed by low temperature nitrogen adsorption method and mercury porosimetry. The results indicate that pore structure is signiifcant factor for the humidity controlling performance of diatomite, which is controlled by micropores and mesopores, and the equilibrium value of moisture adsorption and desorption, which relfect humidity controlling performance, increase as surface area increase, pore volume of micropores and mesopores increase and pore size decrease.