磷石膏在石膏板中的应用研究
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摘要
通过对磷石膏放射性、杂质等的分析,研究磷石膏对石膏板性能的影响,探讨磷石膏在纸面石膏板生产和应用中的特点。结果表明:大部分磷石膏的放射性低于国标GB 6566—2010的限量,但相较于脱硫石膏,其放射性内、外照射指数较高;磷石膏的pH大部分在3～5;磷石膏中酸不溶物和铁铝含量较高;磷石膏样品的w(可溶性F)大多小于0.02%;水洗处理可有效降低磷石膏的杂质含量;乳化石蜡可作为磷石膏基耐水石膏板的防水剂;相较于脱硫石膏,以磷石膏为原料制备的纸面石膏板耐火性能较高。
The radioactivity and impurities of phosphogypsum are determined, and the effect of phosphogypsumon the plasterboard performance is investigated, the utilization potential of phosphogysum in plasterboardproduction is discussed. The results show that, the radioactivity of most phosphogypsum is lower than the limit ofstandard GB 6566—2010, but the internal and external exposure index of phosphogypsum is higher than that offlue gas desulfurization gypsum(FGD); The pH of phosphogypsum is mostly 3-5; The content of acid-insoluble substance, Fe2 O3 and Al2 O3 in phosphogysum are higher than natural gypsum and FGD;The water-soluble fluoride content of phosphogypsum is lower than 0.02%;Washing can effectively reduce the impuritiescontent; Emulsified paraffin can be used as water-proofing agent for phosphogypsum-based water-resistantplasterboard; Compared to FGD, using phosphogypsum as raw material can improve the fire resistance ofplasterboard.
The radioactivity and impurities of phosphogypsum are determined, and the effect of phosphogypsumon the plasterboard performance is investigated, the utilization potential of phosphogysum in plasterboardproduction is discussed. The results show that, the radioactivity of most phosphogypsum is lower than the limit ofstandard GB 6566—2010, but the internal and external exposure index of phosphogypsum is higher than that offlue gas desulfurization gypsum(FGD); The pH of phosphogypsum is mostly 3-5; The content of acid-insoluble substance, Fe2 O3 and Al2 O3 in phosphogysum are higher than natural gypsum and FGD;The water-soluble fluoride content of phosphogypsum is lower than 0.02%;Washing can effectively reduce the impuritiescontent; Emulsified paraffin can be used as water-proofing agent for phosphogypsum-based water-resistantplasterboard; Compared to FGD, using phosphogypsum as raw material can improve the fire resistance ofplasterboard.
引文
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[9]南鹏林,谭建红,蒋达波,等.磷石膏工业化应用的无害化处理[J].广州化工,2014,42(1):19-21.
[2]韩青,罗康碧,李卢萍,等.磷石膏开发利用现状[J].化工科技,2012,20(1):52-58.
[3]杨敏,钱觉时,王智,等.杂质对磷石膏应用性能的影响[J].材料导报,2007,21(6):104-106.
[4]白有仙,詹俊,朱云勤.高品质磷石膏处理工艺研究[J].无机盐工业,2008,40(5):45-47.
[5]王辛龙,张志业,杨秀山.我国磷石膏利用新途径的分析[J].现代化工,2011,31(5):1-5.
[6] NURHAYAT D. Utilization of phosphogypsum as raw and calcined material in manufacturing of building products[J]. Construction and Building Materials,2008,22(8):1857-1862.
[7]彭家惠,万体智,汤玲,等.磷石膏中的有机物、共晶磷及其对性能的影响[J].建筑材料学报,2003,6(3):222-226.
[8]李光明,李霞,贾磊,等.国内外磷石膏处理和处置概况[J].无机盐工业,2012,44(10):11-13.
[9]南鹏林,谭建红,蒋达波,等.磷石膏工业化应用的无害化处理[J].广州化工,2014,42(1):19-21.