CN114105608A - 一种赤泥基多孔陶瓷材料及其制备方法 - Google Patents
一种赤泥基多孔陶瓷材料及其制备方法 Download PDFInfo
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- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 31
- 235000019353 potassium silicate Nutrition 0.000 claims description 30
- 235000019738 Limestone Nutrition 0.000 claims description 25
- 239000006028 limestone Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
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- 239000000292 calcium oxide Substances 0.000 description 3
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
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- 230000001007 puffing effect Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- -1 chemical engineering Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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Abstract
本发明公开了一种赤泥基多孔陶瓷材料及其制备方法。将包含赤泥和水玻璃在内的原料依次经过细磨、造粒、养护、干燥和焙烧,即得赤泥基多孔陶瓷材料,该方法工艺简单,烧成温度低,原料成本低,不仅解决了赤泥等固废的处理问题,还可获得筒压强度高、吸水率低、化学稳定性好的可广泛用于建材及污水处理等领域的高强多孔陶瓷材料,大大降低了陶瓷材料的生产成本,具有良好的市场前景。
Description
技术领域
本发明涉及一种赤泥基多孔陶瓷材料及其制备方法,属于固体废弃物资源综合利用领域。
背景技术
赤泥是氧化铝工业提炼氧化铝后排放的废弃残渣,目前每生产1吨氧化铝,大约产生赤泥0.8~1.5吨,是目前排量较大,又难以综合利用的主要工业废渣之一。我国是氧化铝生产大国,每年产生的赤泥约为3000万吨以上,约占全球的1/3以上。目前国内外氧化铝厂大部分将赤泥输送堆场堆存和筑坝堆存,赤泥的堆放不仅占用大量土地,耗费较多的建设和维护费用,而且存在于赤泥中的碱会向地下渗透,造成地下水体的污染和土壤污染,严重恶化生态环境。因此资源化利用迫在眉睫。关于赤泥的利用,国内外已经做过一些研究,国内主要作为矿物原料的整体利用和提取有价值的金属元素,赤泥中的主要成分为氧化铁、氧化硅、氧化铝、氧化钙等化学成分,陶瓷材料多以氧化硅、氧化铝等无机材料为主要原料,故赤泥可用来制备陶瓷材料。近年来也出现利用赤泥制备陶瓷材料用于建筑材料原料,这对赤泥的利用又增加了一种途径,因此,利用赤泥制备多孔陶瓷材料既有效解决了环境污染,又能降低企业成本,提高产品性能。
多孔陶瓷材料通常是在一定温度(一般是高温)下处理,使原料发生化学反应释放气体,产生气孔和膨胀,冷却后形成轻质多孔、有一定强度的陶瓷材料。多孔陶瓷材料内部结构特征呈细密蜂窝状微孔。多孔陶瓷材料具有优异的性能,如密度低、筒压强度高、孔隙率高、软化系数高、抗冻性良好以及抗碱集料反应性优异等,特别由于多孔陶瓷材料密度小,内部多孔,形态,成分较均一,且具一定强度和坚固性,因而具有质轻,耐腐蚀,抗冻,抗震和良好的隔绝性等多功能特点。利用多孔陶瓷材料这些优异的性能,可以将它广泛应用于建材、园艺、食品饮料、耐火保温材料、化工和石油等部门,应用领域越来越广,还在继续扩大。
发明内容
针对现有技术存在的问题,本发明的第一个目的在于提供了一种物理强度高、吸水率低、成本低廉,可广泛应用于多种场景的多孔陶瓷材料。
本发明的第二个目的在于提供一种简单、低污染、便于实施的制备所述赤泥基陶瓷材料的方法。
为了实现上述技术目的,本发明提供了一种赤泥基多孔陶瓷材料的制备方法,该方法是将包含赤泥和水玻璃在内的原料依次经过细磨、造粒、养护、干燥和焙烧,即得赤泥基多孔陶瓷材料。
本发明技术方案以赤泥作为主要成分,水玻璃作为辅料。主要是利用赤泥中的硅铝源来形成玻璃相骨架,而水玻璃一方面作为粘结剂,有利于赤泥粉末的造粒过程,另外一方面提供硅源,调节赤泥中的硅铝比,以获得具有较好力学强度的玻璃相。而赤泥中还含有大量的碱性类物质、钙镁类物质以及铁氧化物等,可以促进低温液相的生成,降低焙烧温度,同时参与玻璃相的生成。此外,赤泥中含有的水分等易挥发组分在烧结过程中参与膨化,实现造孔,从而得到力学性能较好的多孔陶瓷材料。
作为一个优选方案,所述原料还包含石灰石。石灰石一方面可以作为造孔剂,其在高温下分解释放二氧化碳,可以参与膨化作用,同时石灰石分解产生的氧化钙是优质的助熔剂,降低焙烧温度,促使低温液相生成。
作为一个优选方案,所述原料的质量百分比组成为:赤泥60~85%,石灰石0~20%,水玻璃10~30%。所述原料的质量百分比组成优选为:60~80%,石灰石0~10%,水玻璃15~30%。当赤泥比例过高,水玻璃用量过低时,陶粒内部产生的玻璃相成分过少,导致陶粒强度不够,不易成型。
作为一个优选方案,所述赤泥的主要组分及各主要组分的质量百分比含量为:SiO2 11.19~10.78%,Fe2O3 36.68~34.80%,Al2O3 16.43~16.87%,CaO 12.69~13.43%,MgO 0.26~0.33%,Na2O 4.88~4.49%,TiO2 6.36~6.63%,附碱0.14~0.2%。附碱是赤泥在强碱性的浆液中沉降,经洗涤后的残留碱,其组分主要有铝酸钠、氢氧化钠、碳酸钠和少量的硅酸钠、硫酸钠、草酸钠等。
作为一个优选方案,赤泥和水玻璃细磨至200目以下。将赤泥和水玻璃磨矿至适当粒度,有利于提高高温固相反应效果。
作为一个优选方案,所述造粒满足粒料直径为10~15mm。
作为一个优选方案,所述养护的时间为30~60h。养护温度为室温。
作为一个优选方案,所述焙烧的温度为800~1100℃,时间为10~60min。优选的焙烧温度为1000~1100℃,时间为20~40min。
作为一个优选方案,所述干燥是在110~130℃下干燥1~3h。
本发明还提供了一种赤泥基多孔陶瓷材料,其由所述制备方法得到。
作为一个优选方案,所述多孔陶瓷材料的堆积密度为500~800kg/m3,筒压强度5~12MPa,吸水率小于10%。所得多孔陶瓷材料介孔结构居多,结构紧密,减少了材料的吸水率。作为一个较优选方案,所述多孔陶瓷材料的堆积密度为600~700kg/m3,筒压强度8~12MPa,吸水率小于4%。
相对现有技术,本发明技术方案带来的有益技术效果:
本发明提供了一种赤泥基多孔陶瓷材料的制备方法,该方法步骤简单,工艺条件温和,成本低,对赤泥利用率高,解决赤泥长期累积问题。
本发明提供了一种以赤泥固废作为主要原料制备的多孔陶粒,获得的多孔陶粒力学强度高、吸水率低,可用于建筑、水处理和园林艺术等领域,具有良好的市场前景,并对实现以废治废具有重要意义。
具体实施方式
为使本发明所述内容更加便于理解,下面结合具体实施方式对本发明所述的技术方案做进一步的说明,但本发明不仅限于此。
实施例1
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥75%、石灰石10%、水玻璃15%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1000℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制得的赤泥基多孔陶瓷材料,其堆积密度为600.65kg/m3,筒压强度为6.8MPa,吸水率为9.2%。
实施例2
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥70%、石灰石5%、水玻璃25%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1000℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制得的赤泥基多孔陶瓷材料,其堆积密度为663.21kg/m3,筒压强度为7.3MPa,吸水率为5.2%。
实施例3
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥65%、石灰石8%、水玻璃27%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1000℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制得的赤泥基多孔陶瓷材料,其堆积密度为686.48kg/m3,筒压强度为7.9MPa,吸水率为4.9%。
实施例4
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥60%、石灰石10%、水玻璃30%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1100℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制得的赤泥基多孔陶瓷材料,其堆积密度为701.48kg/m3,筒压强度为8.5MPa,吸水率为4.7%。
实施例5
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥80%、石灰石0%、水玻璃20%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1100℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制得的赤泥基多孔陶瓷材料,其堆积密度为823.61kg/m3,筒压强度为11.39MPa,吸水率为3.47%,这是因为利用水玻璃粘结力强及强度高的特点,提高陶瓷材料的密度、强度及耐水性能。
实施例6(对比实施例)
(1)取赤泥、石灰石和水玻璃分别烘干细磨后,过200目筛,备用;
(2)将细磨过筛完成的赤泥、石灰石、水玻璃按比例混合均匀,各组分重量百分比为:赤泥85%、石灰石0%、水玻璃15%。加入适量水充分搅拌后造粒成型,颗粒直径大约为10~15mm;
(3)将上述颗粒在室温下养护48h;
(4)将养护后的颗粒在120℃下干燥2h;
(5)将干燥完成的颗粒在1100℃温度下焙烧30min得到赤泥基多孔陶瓷材料。
通过上述方案制备赤泥基多孔陶瓷材料无法成型。
Claims (10)
1.一种赤泥基多孔陶瓷材料的制备方法,其特征在于:将包含赤泥和水玻璃在内的原料依次经过细磨、造粒、养护、干燥和焙烧,即得赤泥基多孔陶瓷材料。
2.根据权利要求1所述的一种赤泥基多孔陶瓷材料的制备方法,其特征在于:所述原料还包含石灰石。
3.根据权利要求1或2所述的一种赤泥基多孔陶瓷材料的制备方法,其特征在于:所述原料的质量百分比组成为:赤泥60~85%,石灰石0~20%,水玻璃10~30%。
4.根据权利要求3所述的一种赤泥基多孔陶瓷材料的制备方法,其特征在于:所述赤泥的主要组分及各主要组成质量百分比含量为:SiO2 11.19~10.78%,Fe2O3 36.68~34.80%,Al2O316.43~16.87%,CaO 12.69~13.43%,MgO 0.26~0.33%,Na2O 4.88~4.49%,TiO2 6.36~6.63%,附碱0.14~0.2%。
5.根据权利要求4所述的一种赤泥基多孔陶瓷材料及其制备方法,其特征在于:赤泥和水玻璃细磨至200目以下。
6.根据权利要求1所述的一种赤泥基多孔陶瓷材料及其制备方法,其特征在于:所述造粒满足粒料直径为10~15mm。
7.根据权利要求1所述的一种赤泥基多孔陶瓷材料及其制备方法,其特征在于:所述养护的时间为30~60h。
8.根据权利要求1所述的一种赤泥基多孔陶瓷材料及其制备方法,其特征在于:所述焙烧的温度为800~1100℃,时间为10~60min。
9.一种赤泥基多孔陶瓷材料,其特征在于:由权利要求1~8任一项所述制备方法得到。
10.根据权利要求9所述的一种赤泥基多孔陶瓷材料,其特征在于:所述多孔陶瓷材料的堆积密度为500~800kg/m3,筒压强度5~12MPa,吸水率小于10%。
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