CN114685175A - 一种矾土基烧结刚玉莫来石及其生产制备方法 - Google Patents
一种矾土基烧结刚玉莫来石及其生产制备方法 Download PDFInfo
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 43
- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 32
- 239000010431 corundum Substances 0.000 title claims abstract description 32
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 42
- 238000005245 sintering Methods 0.000 claims description 39
- 239000000843 powder Substances 0.000 claims description 25
- 239000002002 slurry Substances 0.000 claims description 24
- 239000011230 binding agent Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- 238000000498 ball milling Methods 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000011265 semifinished product Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229920000609 methyl cellulose Polymers 0.000 claims description 6
- 239000001923 methylcellulose Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000008107 starch Substances 0.000 claims description 6
- 235000019698 starch Nutrition 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 10
- 238000003825 pressing Methods 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
本发明公开了一种矾土基烧结刚玉莫来石及其生产制备方法,其中的矾土基烧结刚玉莫来石,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%,制备方法包括以下步骤:S1材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土。本发明设计合理,以天然铝矾土生料为主要原料,提高资源利用率,实现了铝矾土矿的合理高效使用,生产成本低,且吸水率低、体积密度大,具有很好的耐磨、抗侵蚀和高温力学性能。
Description
技术领域
本发明涉及刚玉莫来石技术领域,尤其涉及一种矾土基烧结刚玉莫来石及其生产制备方法。
背景技术
耐火材料是高温工业不可或缺的基础材料,广泛服务于建材、电力、石化、冶金等国民经济基础行业。我国耐火材料的总产量占世界总产量的近70%。目前我国约有65%耐火材料属于Al2O3-SiO2系产品,其中近65%以高铝矾土为原料,因此,可以说耐火铝矾土是支撑耐火材料工业的重要基础。但传统耐火铝矾土熟料生产粗犷,加工简单,原料产品化学成分、物理指标、使用性能波动大,不利于制品质量的控制。
我国耐火矾土资源丰富,而优质铝矾土储量却有限。长期的不合理开采,导致了优质原料出现了供应方面的问题,同时致使大量非优质矿不能被合理高效利用,甚至是被随意丢弃,浪费资源的同时还破坏了生态环境,因此我们提出了一种矾土基烧结刚玉莫来石及其生产制备方法用于解决上述问题。
发明内容
基于背景技术存在的技术问题,本发明提出了一种矾土基烧结刚玉莫来石及其生产制备方法。
本发明提出的一种矾土基烧结刚玉莫来石,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
一种矾土基烧结刚玉莫来石的生产制备方法,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为3μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
优选的,所述高铁铝土矿含有(40-60)质量%的氧化铝和(5-25)质量%的二氧化硅。
优选的,所述S2中烧结处理的温度为450-570℃,时间为30-90min。
优选的,所述S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
优选的,所述S6中成型挤压力为68.65-98.07MPa,S7中的成型挤压力为70-76MPa。
优选的,所述S8中预烧温度设置为700-1000℃。
优选的,所述S9中的温度设置为1470-1530℃,且保温设置为3-5h。
与现有技术相比,本发明的有益效果是:
本发明具仅以天然铝矾土生料为主要原料,提高资源利用率,同时提升了铝硅耐火原料的品质和铝矾土矿的附加值,采用连续湿法球磨无粉尘污染,所获得的生料粒度更细,有利于降低烧结温度,节约能耗,降低了生产成本,且刚玉莫来石具有耐磨、抗侵蚀及力学性能。
具体实施方式
下面结合具体实施例对本发明作进一步解说。
实施例一
本实施例中提出了一种矾土基烧结刚玉莫来石,包括以下重量份的原料:
主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
一种矾土基烧结刚玉莫来石的生产制备方法,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为3μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
本实施例中,高铁铝土矿含有40质量%的氧化铝和5质量%的二氧化硅。
本实施例中,S2中烧结处理的温度为450℃,时间为30min。
本实施例中,S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
本实施例中,S6中成型挤压力为68.65MPa,S7中的成型挤压力为70MPa。
本实施例中,S8中预烧温度设置为700℃。
本实施例中,S9中的温度设置为1470℃,且保温设置为5h。
实施例二
本实施例中提出了一种矾土基烧结刚玉莫来石,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
一种矾土基烧结刚玉莫来石的生产制备方法,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为3μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
本实施例中,高铁铝土矿含有45质量%的氧化铝和10质量%的二氧化硅。
本实施例中,S2中烧结处理的温度为500℃,时间为40min。
本实施例中,S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
本实施例中,S6中成型挤压力为75MPa,S7中的成型挤压力为72MPa。
本实施例中,S8中预烧温度设置为800℃。
本实施例中,S9中的温度设置为1490℃,且保温设置为3.5h。
实施例三
本实施例中提出了一种矾土基烧结刚玉莫来石,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
一种矾土基烧结刚玉莫来石的生产制备方法,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为2.8μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
本实施例中,高铁铝土矿含有55质量%的氧化铝和15质量%的二氧化硅。
本实施例中,S2中烧结处理的温度为520℃,时间为80min。
本实施例中,S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
本实施例中,S6中成型挤压力为80MPa,S7中的成型挤压力为74MPa。
本实施例中,S8中预烧温度设置为900℃。
本实施例中,S9中的温度设置为1500℃,且保温设置为4.5h。
实施例四
本实施例中提出了一种矾土基烧结刚玉莫来石,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
一种矾土基烧结刚玉莫来石的生产制备方法,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为3μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
本实施例中,高铁铝土矿含有60质量%的氧化铝和25质量%的二氧化硅。
本实施例中,S2中烧结处理的温度为570℃,时间为90min。
本实施例中,S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
本实施例中,S6中成型挤压力为98.07MPa,S7中的成型挤压力为76MPa。
本实施例中,S8中预烧温度设置为1000℃。
本实施例中,S9中的温度设置为1530℃,且保温设置为5h。
本发明具仅以天然铝矾土生料为主要原料,提高资源利用率,同时提升了铝硅耐火原料的品质和铝矾土矿的附加值,采用连续湿法球磨无粉尘污染,所获得的生料粒度更细,有利于降低烧结温度,节约能耗,降低了生产成本,且刚玉莫来石具有耐磨、抗侵蚀及力学性能。
选取实施例一到实施例四中制备的刚玉莫来石成品进行检测,如表所示:
结果表明,实施例四为最佳实施例。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种矾土基烧结刚玉莫来石,其特征在于,主晶相为刚玉相和莫来石,以质量百分比计其化学成分为:Al2O3≤87%,Fe2O3≤1%,SiO2≤8%,TiO2≤2.2%,CaO≤0.6%,MgO≤0.6%,Na2O≤0.6%,且上述各组分含量百分数之和等于100%。
2.一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,包括以下步骤:
S1:材料准备:通过该开采的天然铝矾土矿,从开采的天然铝矾土矿中选取优质矾土;
S2:材料预处理:将S1中获得的优质矾土添加到烧结设备中进行烧结处理,并将烧结后的矾土进行破碎;
S3:湿法球磨粉碎:将S2中的原料和水持续运送球磨机,经连续球磨溢流,连续输出料浆,要求浆料中颗粒粒度为3μm以下;
S4:除杂:将S3中浆料通过除杂设备,除去浆体中磁性物质,以便去除四氧化三铁;
S5:干燥:将S4中的粉碎后的泥浆状微粒进行干燥,且将干燥后的粉块进行松散成干料粉;
S6:颗粒造型A:将S5中的矾土干燥粉与临时粘结剂进行混合,通过螺旋挤压机挤压成条,再切成需要尺寸的颗粒;
S7:颗粒造型B:将S5中的矾土干燥粉与临时粘的混合物添加到模具中,通过压机模压成型,压成型的料块通过振动筛,筛选需要的尺寸;
S8:预烧:将S6或S7中获得的半成品颗粒进行干燥,并进行预烧取出临时粘结剂;
S9:烧结:通过升温对半成品继续烧结,通过保温、自然冷却后能够获得刚玉莫来石成品。
3.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述高铁铝土矿含有(40-60)质量%的氧化铝和(5-25)质量%的二氧化硅。
4.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述S2中烧结处理的温度为450-570℃,时间为30-90min。
5.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述S6和S7中的临时粘结剂为淀粉、甲基纤维素、膨润土或聚乙烯醇的4%浓度水溶液。
6.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述S6中成型挤压力为68.65-98.07MPa,S7中的成型挤压力为70-76MPa。
7.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述S8中预烧温度设置为700-1000℃。
8.根据权利要求2所述的一种矾土基烧结刚玉莫来石的生产制备方法,其特征在于,所述S9中的温度设置为1470-1530℃,且保温设置为3-5h。
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