PDF《矿产综合利用》

且操作简便快捷、结果准确. 2实验部分 测定则是表征其阻燃性能的途径之一.有关报道的 2.1 仪器与试剂 阻燃剂的测定方法有高效液相色谱法心1和气相色

761 Campact离子色谱仪,超纯水仪(Millipore 谱―质谱联用法∞"】.高效液相色谱法采用甲苯微 美国NALGENE公司),德国IKA―werkeC

2000、 ・童Ed￡・SE・S"S厶-皇鲥Ed量.毫曲最E.毫E.毫芒dE.s西一Ed￡砖酗SE破量d厶.毫芒.毫E.毫E.毫Ed芒.毫hSE.SEd"sEdE.昱E.昱厶碡E越E破E・SE・SE.S厶d￡.昱E.直"SEd￡.毫￡ (Northeastern University,Shenyang,Liaoning,China) Abstract:The technological conditions for extracting silica from fly ash by alkaline leaching were optimized by llleans of the orthogonal experimental design.The results show that the optimal conditions for extracting silica from fly ash by alkaline leaching踟℃a8 blows:reaction temperature is 1300C.initial concentration of NaOH 17.5mol・. L~.the ratio of liquid to solid 1.5:l.and the re.action time is 6min.Under these conditions,the extraction rate of silica from-200mesh ny ash achieved 75.65%,and the ratio of aluminum to silicon in the fly ash residue Can reach

3 after the silica is extracted. Key words:Fly ash;

Silica;

Orthogonal experimental design 收稿日期:2009-12―10;

改回El期:2010-01-06 作者简介:雷勇(1982一),男,助理工程师,主要从事分析测试工作. 万方数据