硅藻土在轻质板生产中的应用研究
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摘要
以轻质多孔的硅藻土为原料部分替代石英砂,采用流浆法生产工艺制备轻质硅酸钙板。通过小试试验研究了硅藻土掺量对制品物理性能的影响。结合小试试验结果进行中试生产试验,进一步研究了硅藻土掺量对硅酸钙板物理性能及生产过程的影响。研究表明,当用硅藻土替代100%石英砂时制得板材的密度低至0.84 g/cm~3,抗折强度为11.15 MPa,符合JC/T 564.1—2008中的D0.8～1.3-Ⅳ级抗折强度指标要求。用硅藻土生产硅酸钙板生产线的工艺设计需考虑提高脱水及烘干能力。
Lightweight calcium silicate board were prepared with light,porous diatomite as raw material partly replace quartz sand via the flow-on process. The effect of the different additions of the diatomite on the physical properties of product was investigated through moulded experiments. According to the experiment results of molding production experiment,further studied the effects of different additions of diatomite on the physical properties of calcium silicate board and production process. The results indicate that when replace 100% quartz sand with diatomite,the density and the flexural strength of the board were 0.84 g/cm~3 and 11.15 MPa,which can meet the requirements of D0.8～1.3-Ⅳ(JC/T 564.1—2008). So the process design of calcium silicate board line using diatomite needs to consider raising dehydration and drying capacity.
Lightweight calcium silicate board were prepared with light,porous diatomite as raw material partly replace quartz sand via the flow-on process. The effect of the different additions of the diatomite on the physical properties of product was investigated through moulded experiments. According to the experiment results of molding production experiment,further studied the effects of different additions of diatomite on the physical properties of calcium silicate board and production process. The results indicate that when replace 100% quartz sand with diatomite,the density and the flexural strength of the board were 0.84 g/cm~3 and 11.15 MPa,which can meet the requirements of D0.8～1.3-Ⅳ(JC/T 564.1—2008). So the process design of calcium silicate board line using diatomite needs to consider raising dehydration and drying capacity.
引文
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[2]谷晋川,张允湘,刘亚川,等.微波作用下硅藻土提纯研究[J].矿业工程,2004,24(4):30-33.
[3]Li Xingwei,Li Xiaoxuan,Wang Gengehao.Surface modification of diatomite using polyaniline[J].Materials Chemistry and Physics,2007,102:140-143.
[4]赵洪石,何文,罗守全,等.硅藻土应用及研究进展[J].山东轻工业学院学报,2007,21(1):80-82.
[5]M.A.M.KhrMsheh,M.A.A1 Ghouti,S.J.Allen,et a1.Effect of OH and silanol groups in the removal of dyes from aqueous solution using diatomite[J].Water Research,2005,39:922-932.
[6]Tsai Wen-Tien,Hsien Kuo-Jong,Lai Chi-Wei.Chemical Activation of Spent Diatomaceous Earth by AlkalineEtching in the Preparation of Mesopomus Adsorbents[J].Ind.Eng.Chem.Res.,2004,43:7513-7520.
[7]Tsai Wen-Tien,Lai Chi-Wei,Hsien Kuo-Jong.Characterization and adsorption properties of diatomaceous earth modified by hydrofluoric acid etching[J].Journal of Coloid and Interface Science,2006,297:749-754.
[8]Gao B J,Jiang P F.Studies on the surface modification of diatomite with polyethyleneimine and trapping effect of the modified diatomite for phenol[J].Applied Surface Science,2005,250(3):273-279.
[9]Majeda A M.Remediation of wastewater containing heavy metals using raw and modified diatomite[J].Chemical Engineering Journal,2004,99(29):177-184.
[10]朱健,王平,雷明婧,等.硅藻土理化特性及改性研究进展[J].中南林业科技大学学报,2012,32(12):61-66.
[11]许树成.硅藻土开发应用与特性研究[J].阜阳师范学院学报(自然科学版),2009,17(3):29-31.