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贵州保温材料分析丨岩棉保温材料的优势与应用

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贵州保温材料分析丨岩棉保温材料的优势与应用

发布日期:2018-09-13 00:00 来源:http://bvesqfl.com 点击:

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保温材料按照材质组成来划分,大致可以分为两大类:一是有机聚合物绝热材料,如发泡聚苯乙烯泡沫板、硬质聚氨酯泡沫板等;二是无机保温材料,如岩棉、玻璃棉、泡沫玻璃板等。其中,以岩棉、玻璃棉为代表的矿物棉因具有其他保温材料所不具有的优点,在保温材料行业内备受推崇,产量一直呈现逐年上升的态势。其中岩棉以其更高的耐火极限和熔点温度,在建筑保防火保温方面更受青睐,近几年来,贵州保温材料产量呈一路增长态势。

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在上世纪初,西方国家就已经实现了岩棉的工业化生产。其大致步骤是,将一定粒径的原材料和焦炭按照设计的配合比送入熔制炉(冲天炉)中熔化成液体,液流经过导液槽流入离心成纤设备上被拉长成短纤维。在成纤过程中将粘结剂、憎(亲)水剂等喷洒在纤维表面。这样,岩棉的每根纤维表面均有粘结剂和憎(亲)水剂,成板后制品无论如何切割,其表面均具有憎(亲)水性。纤维经过集棉装置后被输送到摆锤机上进行叠棉,成为一定厚度的叠加棉层。当对岩矿棉的力学强度有要求的时候,棉层进入打摺机中进一步挤压堆叠,或者再经过纵向压摺,进一步加大棉层的空间交叉绞合。然后进入固化炉中固化,固化作用是将粘结剂在一定温度下固化,使材料定型成为具有一定抗压强度的制品。贵州保温材料连续固化得到的制品经过切割裁剪,成为一定规格的板材,最后检验包装,得到最终的岩棉产品。

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我国自上世纪80年代初从瑞典引入岩棉全套生产技术,岩棉开始在我国大规模产业化生产。当时主要是生产酸度系数在1.1~1.4的矿渣棉,主要用于工业设备和管道的保温,产品质量水平普遍不高,与国外先进水平存在较大差距。进入本世纪,随着人民生活水平的提高,对居住舒适度的追求和国家对建筑节能的要求,岩棉开始在建筑上得到应用,主要用于办公及公共建筑的屋面保温、内墙保温及防火门和彩钢夹芯板等。但由于岩棉价格相对较高,建筑商更愿意使用有机泡沫类的保温材料,岩棉没有得到大规模的推广和应用,产品质量也是参差不齐。但随之而来的几场大火,使人们认识到不燃保温材料的重要性,国家也相继发布了一系列建筑防火安全的法规和文件,规定用于高层建筑和公共建筑的保温材料必须使用A级不燃材料。在这个背景下,南京玻璃纤维研究设计院等单位牵头制定了GB/T 25975-2010《建筑外墙外保温用岩棉制品》国家标准,该标准以国际最先进的欧洲建筑外墙外保温用岩棉标准为依据,对我国的建筑外墙外保温用岩棉产品提出了全新的技术要求,要生产出满足该标准要求的产品,必须在原料、生产技术装备、工艺参数控制等方面投入很大的改造。例如:为达到酸度系数大于1.6的要求,必须改变原有配方,增加玄武岩的配比;为满足岩棉板拉伸强度的要求,必须在集棉设备上增加摆锤,以改善岩棉板的平面铺层,形成纤维层之间相互勾连交错的三维结构板状制品,也使制品的密度均匀性大大提高;为降低吸水率和吸湿率、提高憎水率,必须采用具有较强憎水效果的粘结剂;为满足标准中对纤维直径和渣球含量的要求,必须对熔化、成纤设备进行改造升级;为满足对岩棉板尺寸精度的要求,必须采用高精度无尘切割技术。该标准的实施,不仅促进了我国建筑外墙外保温岩棉制品从无到有的发展,为岩棉在建筑外墙外保温系统中的应用提供了依据,同时促进了我国岩棉产业制造技术装备水平的提升,贵州保温材料使我国岩棉产品的质量迈上了一个新的台阶,也促进了岩棉产业的发展和岩棉产品的应用。

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大体上,现代化岩棉生产线若要实现绿色生产目标,往往要着眼于以下几点。一是回收利用一氧化碳。众所周知,一氧化碳有毒,且会造成温室效应。但同时一氧化碳本身又是一种燃料,它是煤气的主要成分。现代化生产线往往设立了废气焚烧装置,充分燃烧废气中的一氧化碳。同时,为了节能,贵州保温材料对余热也要加以回收利用,比如可以使用换热系统首先供暖,或加热自来水,实现工厂生活区的日常热水供应,更彻底地实现节能目标。二是废水的回收利用。废水几乎是所有工业生产线都要考虑的问题。废水回收系统或废水净化系统是现代化生产线所必须的。对岩棉产业,污水经过过滤装置处理后,回用至粘结剂配制站,可实现生产废水零排放。三是过滤粉尘。粉尘是悬浮在空气中的细小颗粒,长期吸入会对工人和附近居民的健康造成很大危害。现代化生产线应配备完善的粉尘过滤体系,过滤废气中携带的粉尘,实现废气的达标排放,同时,过滤下来的粉尘应设法回收利用。四是避免二氧化硫的排放。二氧化硫是造成酸雨的主要元凶,同时也危害人类的生命健康。现代化生产线应配备脱硫系统,去除废气中的二氧化硫,实现清洁化生产的目标。五是固体废物的回收。生产线产生的废渣、废棉应该通过回用系统重新用于矿物棉生产,从而实现矿物棉生产线固废的循环使用,降低生产成本。

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TONGSHI,DUIQIYEBENSHENLAISHUO,SHIXIANLVSESHENGCHANBUJINFUHEGUOJIAZHENGCEHERENMENDEYUANWANG,TONGSHIDUIQIYEBENSHENDEYINGLI,WANGWANGYEYOUSUOBIYI。SHENGCHANFEILIAODELUANPAIFANGXINGWEIBUJINSUNHAILEHUANJINGHERENMENDELIYI,JIBIANCONGQIYEZISHENDELIYILAISHUO,YESHIYIZHONGDUANSHIXINGWEI。YISHANGWENSUOTIDAODEGUFEIHUISHOULAISHUO,GONGYEGUTIFEIQIWU(JIANCHENGGONGYEGUFEI)SHIZAIGONGYESHENGCHANGUOCHENGZHONGPAICHUDECAIKUANGFEISHI、XUANKUANGWEIKUANG、RANLIAOFEIZHA、YELIANJIHUAGONGGUOCHENGFEIZHADENGGUTIFEIWU。GENJU《DAZONGGONGYEGUTIFEIWUZONGHELIYONG“SHIERWU”GUIHUA》ZHONGDEXIANGGUANSHUJUTONGJI,DAZONGGONGYEGUFEIZONGDUICUNLIANGDADAO270YIDUN,DUICUNJIANGXINZENGZHANYONG40WANMU。GONGYEGUFEIZHIJIEPAIRUHUANJINGHUIZAOCHENGYANZHONGHUANJINGWURAN,ERTIANMAICHULIXUZHANYONGDALIANGDETUDIZIYUAN,TONGSHIZAOCHENGZIYUANDELANGFEI。

JIUKUANGWUMIANXINGYEERYAN,GUOJISHANGYIJINGYOUSHAOSHUFADAGUOJIAYANFACHUXINDEKUANGWUMIANSHENGCHANJISHU,LIYONGGONGYEGUFEIDAITITIANRANKUANGSHIZUOWEIKUANGWUMIANSHENGCHANYUANLIAO,ZHEIZHONGJISHUKEYIBA90%YISHANGDEGUFEIBIANFEIWEIBAO。GAIJISHUDEYUNYONGYIFANGMIANJIANSHAOLETIANRANKUANGSHIDEXIAOHAO,LINGYIFANGMIANNENGGOUYOUXIAOCHULIGONGYEGUFEI,SHIXIANNENGYUANYOUHUALIYONG,SHIYIZHONGZHIDEDALITICHANGDEJISHU。RANERGUONEIKUANGWUMIANSHENGCHANSHIYONGDEYUANLIAORENGRANYITIANRANKUANGSHIWEIZHU,TIANJIASHAOLIANGDEGONGYEKUANGZHA。ERGONGYEGUFEIWEIYUANLIAODAGUIMOYONGYUKUANGWUMIANSHENGCHANJISHUZAIGUONEIRENGCHUYUQIBUJIEDUAN,JIXUTONGGUOZIZHUYANFASHIXIANGONGYEGUFEIHUISHOUDEZONGHELIYONGJITIANRANKUANGSHIZIYUANDEBAOHU。RUGUOCAIYONGKUANGWUMIANSHENGCHANXINJISHU,JIU2014NIANWOGUOKUANGWUMIANZONGCHANNENG215WANDUNGUSUAN,KEZENGJIAKUANGWUMIANXINGYESHOURUYUE8.6YIYUAN,JINGJIJIAZHIFEICHANGKEGUAN。


贵州保温材料

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