1、null60 null8 null nullnullnullnullnull null null null null null null Volnull60null Nonull 8null 2009 M8null null CIESC null Journalnull null null August null 2009 EVM |B于洪浩1, 2, 薛向欣1, 贺null 燕2, 黄大威1( 1v 8, a +110004; 2 + v S, a +110168)K1:M NaOH aNaNO3 ,500null/ 3 h, PM SiO2MA )Mb |A ) ATA, E! bX L
2、Na;Nai X L; N |Ma sc sbTV : SiO2B99null3%, =A, o 0, 100 nmPb1V (BET)152 m2 null g- 1b1oM:M ; E;Ems |: TB 321 null null null null null nullDS M : AcI|: 0438- 1157 (2009) 08- 2124- 06Preparation of high purity precipitated silica from ironore tailings by molten salt methodYU Honghao1, 2, XUE Xiangxin1
3、, HE Yan2, HUANG Dawei1( 1School of Material and Metallurgy , N ortheastern University, Shenyang 110004, Liaoning, China;2School of Material Science and Engineering, Shenyang Ligong University , Shenyang 110168, Liaoning, China)Abstract: The iron ore tailings were mixed with NaOHnullNaNO3 and calcin
4、ed at 500null for 3 h to producesoluble sodium silicatenull The iron ore tailings and NaOH were used as raw materials, and NaNO3 was usedas molten saltnullTheprecipitated silica particlewas prepared by using sodium silicateas a source of silicon bythe chemical precipitation methodnull The compositio
5、n, morphology and structure of thesynthesized particleswere characterized by Xnullray diffraction (XRD), FTIR analysis, transmission electron microscopy (TEM)analysis, and Xnullray fluorescence analysis ( XRF) nullThe SiO2 purity in the precipitated silica product was99null3% by XRFnull The chemical
6、 structure of precipitated silica was hydrated silicon oxide by FTIR analysis.The structureof precipitated silicawas amorphous by XRD analysisnullThe TEM micrograph showed that theshape of precipitated silica particles was nearly spherical, and the average grain diameter was about 100nmnullThe speci
7、fic surface area was 152 m2 nullg- 1by the BET method.Key words: iron ore tailings; molten salt method; precipitated silica; chemical precipitation methodnull null 2009- 02- 24 l, 2009- 04- 24 lb“ #BT: (1980null ), 3,p V 3b “:SE1 S “(50574030)bnullnull“M 1null 871null 2null LV1null 2null1null 铁尾矿中提取
8、硅酸钠null M !A )MKumar15 Eb|MaNaOH#NaNO3SiO2 nullNaOH nullNaNO3=1null2null2 null1 ( :1)1 ( , |z b VHq/ ) , i, o 1 db|a ) M x 811 null5F 0 , b 1d, rA ) AbICPnullAEC kASi i,79 SiO2 qbSiO2 qXlX = m1m2( 1), m1SiO2 , m2M SiO2 b1null 2null2null 白炭黑的制备null|A ) AB HW, “ 0, pH8 9 HT13 ,V ra2Y b|Y !“Cl- V 0, b
9、Q70 null210 h, b1null 3nullsVsY Iris Advantage 1000 ICPnullAEC A c ; D/MAXnullRBX L NMFs; TA Nicolet 380; N; ; 3400 4“ A; H800i 0A4“ R ; FRCnull2 sN k“TGnullDTAs; B NOVA1000e1V d#sN“ 1V ; ZXS100eX L; N“ sb2nullT) 2null 1nullM R S #s % Q,m1 R sm V,M S d50= 12 nullmbVV1 V A,M 1sSiO2#Fe2O3, sAl2O3,CaO,
10、 MnOTiO2b2null 2null M NaOHnullNaNO3Ym2M NaOHnullNaNO3TGnullDTAmb m U,200 null/TG wLnull2125nullnull8 null null : EVM |B 1 , DTA wL V ? 3 QbDTA wL 290nullP V UNaNO3 7 S ,V CAM 7 S Q, TG wL 1 NaNO3sbDTA wL530 nullP V UNaNO3 s, Qb |5: 1 - zs, 1 - zs,il 1m,m3447 cm- 11641 cm- 1) l, O null Hv % b1079 cm
11、- 1Sinull Oo w l; 948 cm- 1)C 6B l, Si null OH w lb791 cm- 1O null H w l, 467 cm- 1Sinull Oo % lnull2127nullnull8 null null : EVM |B15null16 ,N V =Abm9TEMm,m V b# A, R o, 100 nmPb), Zhang Xia (f), Shen Xiaoyi ( #kj), Zhai Yuchun (=), Xu Dong ().Technology research on green metallurgy of high addedva
12、lue utilization of valuable elements in laterite nickel orenull2128nullnullnullnullnull null60 null( null ): Preparation of silica white using molten NaOHextracting silicon methodnull Journal of Chemical Industryand Engineering (China) (), 2008, 59 ( 10):2688null269110 null Li Yong ( ), Xue Xiangxin
13、 (_), Feng Zongyu(7), Jiang Tao (!). Preparation of precipitatedsilica from oil shale residue. T he Chinese Journal ofProcess Engineering (V), 2007, 7 (4): 751null75411 null Jesionowski Tnull Characterization of silicas precipitated fromsolution of sodium metasilicate and hydrochloric acid inemulsio
14、n mediumnull Powder Technolnull , 2002, 127: 56null6512 null Hou Taipeng ( ), Liu Yingkui ( ).Experimental research on preparation of precipitated SiO2from Bentonitenull N onnullmetallic Mines (d ), 2000,23 (1): 26null2913 null Lucas A, Rodr L, Lobato J, et alnull Synthesis of crystallinenullnullNa2
15、Si2O5 from sodium silicate solution for use as a builderin detergentsnull Chemnull Engnull Scinull , 2002, 57: 479null48614 null Chen Shouchun ( p). Importance of InorganicChemical Reactions (1Q). Shanghai:Shanghai Science and Technology Publishing, 1994: 50715 null Kumar P, Mal N, Oumi Y, Yamana K,
16、 Sano TnullMesoporous materials prepared using coal fly ash as thesilicon and aluminum sourcenull Jnull Maternull Chemnull , 2001, 11:3285null329016 null Baruah M K, Kotoky P, Borah G Cnull Distribution andnature of organicand mineralbound elements in Asianull CoalsFuel, 2003, 82: 1783null1791null2129nullnull8 null null : EVM |B
