CN115141034A - 一种赤泥烧结骨料 - Google Patents
一种赤泥烧结骨料 Download PDFInfo
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- CN115141034A CN115141034A CN202110346358.XA CN202110346358A CN115141034A CN 115141034 A CN115141034 A CN 115141034A CN 202110346358 A CN202110346358 A CN 202110346358A CN 115141034 A CN115141034 A CN 115141034A
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- red mud
- sintered aggregate
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- 239000002994 raw material Substances 0.000 claims abstract description 45
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 8
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 239000011499 joint compound Substances 0.000 claims description 118
- 238000005245 sintering Methods 0.000 claims description 40
- 238000012216 screening Methods 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 26
- 239000010456 wollastonite Substances 0.000 claims description 19
- 229910052882 wollastonite Inorganic materials 0.000 claims description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 229910052656 albite Inorganic materials 0.000 claims description 13
- 239000010433 feldspar Substances 0.000 claims description 13
- 239000000395 magnesium oxide Substances 0.000 claims description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 13
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 12
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 12
- 229910052642 spodumene Inorganic materials 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000005995 Aluminium silicate Substances 0.000 claims description 8
- 235000012211 aluminium silicate Nutrition 0.000 claims description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 229910000281 calcium bentonite Inorganic materials 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910001570 bauxite Inorganic materials 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 4
- 229940080314 sodium bentonite Drugs 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- 229960000829 kaolin Drugs 0.000 claims description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims 1
- 239000003607 modifier Substances 0.000 claims 1
- 229940072033 potash Drugs 0.000 claims 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 1
- 235000015320 potassium carbonate Nutrition 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 11
- 239000004567 concrete Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
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- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- QNCDBCXTXVGGRH-UHFFFAOYSA-N O.O.[O-2].[Fe+2] Chemical compound O.O.[O-2].[Fe+2] QNCDBCXTXVGGRH-UHFFFAOYSA-N 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 229910052849 andalusite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Abstract
本发明涉及建筑材料,具体涉及一种赤泥烧结骨料。赤泥烧结骨料,其特征在于,包括如下质量分数的原料:赤泥50‑90%,助熔剂1‑10%,粘接剂1‑5%,发泡剂1‑15%,硅铝比调节剂3‑18%,增强剂1‑15%。本发明提供一种赤泥烧结骨料,以赤泥为主要原料,辅助硅铝比调节剂、助熔剂、增强剂等添加剂,制备筒压强度高、吸水率低的烧结骨料。
Description
技术领域
本发明涉及建筑材料,具体涉及一种赤泥烧结骨料。
背景技术
随着我国氧化铝产量的逐年增长和铝土矿品位的逐渐降低,赤泥的年产生量不断增加。大量的赤泥如果不能充分有效的利用,依靠大面积的堆场堆放,不仅占用大量的土地,也对环境造成严重的污染大量赤泥流入周边土壤和水体引起pH、电导率升高,重金属总量上升影响动植物生长,并产生大量强碱性粉尘刺激人体呼吸道和眼睛黏膜。赤泥安全处置已成氧化铝工业当务之急,而开展赤泥堆存的环境风险、赤泥溃坝的环境影响、赤泥资源化利用后评估、赤泥堆场修复后场地的生态适宜性等方面却未引起重视,这将直接影响氧化铝工业的可持续发展。
而对赤泥的销纳主要采取的是海底或陆地堆放处置的方法,但随着铝工业的发展,生产氧化铝排出的赤泥量也日益增加,堆存处置所带来的一系列问题随之而出,造成了严重的环境问题。氧化铝厂大都将赤泥输到堆场,筑坝湿法堆存,靠自然沉降分离使部分碱液回收利用。另一种方法是将赤泥干燥脱水后堆存,中国的平果铝业公司主要采用干法堆存,虽然减少了堆存量及可增加堆存的高度,但处理成本增加,并仍需占用土地,同时南方雨水充足,也容易造成土地碱化及水系的污染。赤泥在堆放过程中除了占用大量土地外,还由于赤泥中的化学成分入渗土地易造成土地碱化、地下水污染,人们长期摄取这些物质,必然会影响身体健康。赤泥的主要污染物为碱、氟化物、钠及铝等,其含量较高,超过了中国国家规定的排放标准(《有色金属工业固体废物污染控制标准》GB5058-85)。
由于赤泥中含有大量的强碱性化学物质,稀释10倍后其pH值仍为11.25-11.50,极高的pH值决定了赤泥对生物和金属、硅质材料的强烈腐蚀性。高碱度的污水渗入地下或进入地表水,使水体pH值升高,以致超出国家规定的相应标准,同时由于pH值的高低常常影响水中化合物的毒性,因此还会造成更为严重的水污染。一般认为碱含量为30-400mg/L是公共水源的适合范围,而赤泥附液的碱度高达26348mg/L,如此高碱度的赤泥附液进入水体,其污染不言而喻,赤泥对生态环境的不良影响必须给予高度的重视和认真的研究。堆存量不断增大的赤泥所造成的越来越严重的环境污染,已使赤泥综合利用成为炼铝工业一项急需解决的难题。
发明内容
为解决以上问题,本发明提供一种赤泥烧结骨料,以赤泥为主要原料,辅助硅铝比调节剂、助熔剂、增强剂等添加剂,制备筒压强度高、吸水率低的烧结骨料。具体技术方案如下:
一种赤泥烧结骨料,包括如下质量份的原料:赤泥50-90%,助熔剂1-10%,粘接剂1-5%,发泡剂1-15%,硅铝比调节剂3-18%,增强剂1-15%。
进一步地,所述助熔剂的配比为钾长石10-30%,锂长石5-15%,氧化镁10-40%,锂辉石0-10%,钠长石3-18%,硅灰石0-12%。氧化钠、氧化钾属于碱金属氧化物,具有显著的助熔作用,可促进玻璃相的产生;氧化镁和氧化钙属于碱土金属氧化物,不仅具有助熔作用,而且有助于晶相的产生,提高抗压强度;氧化铁在高温条件下可发生分解反应放出氧气,调节发泡剂反应速率,同时Fe3+被还原为Fe2+,铁离子具有助熔作用。
进一步地,发泡剂包括煤矸石、碳粉、碳化硅、碳酸钙中的一种或多种。
进一步地,所述硅铝比调节剂包括铝矾土、氧化铝、硅灰石中的一种或多种。
进一步地,所述粘结剂包括钙基膨润土、钠基膨润土、高岭土、生高岭土中的一种或多种。
进一步地,所述增强剂包括粉煤灰、黑泥、矿渣、钢渣中的一种或多种。
进一步地,赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。冷却时产生的热风可回收用于干燥过程。
进一步地,所述赤泥100目过筛率95%以上,200目过筛率50%以上,其它原料100目过筛率100%,200目过筛率90%以上。
进一步地,所述混料机的转速为2000-4000r/min。
进一步地,烧结温度为1100-1300℃。
本发明制备的赤泥烧结骨料的筒压强度为4-20MPa,堆积密度为600-1200kg/m3,吸水率≤10%。
本发明的赤泥烧结骨料具有如下有益效果:
(1)本发明采用助熔剂配合赤泥制备烧结骨料,可降低初始熔融温度,并抑制通孔的产生,提高成品率;提高孔隙结构均匀性,促进晶相的产生,增加烧结骨料的抗压强度;提高孔隙结构均匀性,促进晶相的产生,增加制品强度;改变制品外观等。
(2)本发明在原料中添加了发泡剂。赤泥中氧化铁可在高温中生成氧气,而发泡剂可在1100-1300℃下生成二氧化碳等气体,使骨料内部膨胀,降低堆积密度。氧化铁氧气生成阶段不一定在骨料软化状态中,发泡剂的加入可以控制发泡效率和骨料的密度
(3)本发明中增强剂的加入有助于钙钠长石([Ca,Na][Al,Si]2Si2O5),钙铁榴石[Ca2Fe2(SiO4)2]和红柱石(Al2SiO5)等晶相的生成,从而提高赤泥烧结骨料的抗压强度。
附图说明
为了更清楚的说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍,显而易见的,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它附图。
图1为本发明的赤泥烧结骨料的制备方法的流程图。
具体实施方式
下面将结合具体实施例,对本发明的技术方案进行清楚、完整的描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通的技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例,都属于本发明的保护范围。
实施例1
一种赤泥烧结骨料,包括如下质量份的原料:赤泥50%,助熔剂10%,钙基膨润土2%,煤矸石5%,铝矾土18%,粉煤灰15%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为3000r/min。
进一步地,烧结温度为1100℃。
实施例2
一种赤泥烧结骨料,包括如下质量份的原料:赤泥65%,助熔剂8%,钙基膨润土3%,煤矸石4%,铝矾土12%,粉煤灰8%。所述助熔剂的配备为钾长石30%,锂长石5%,氧化镁40%,锂辉石5%,钠长石10%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为3000r/min。
进一步地,烧结温度为1140℃。
实施例3
一种赤泥烧结骨料,包括如下质量份的原料:赤泥78%,助熔剂6%,钠基膨润土5%,碳粉2%,铝矾土5%,黑泥4%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为3000r/min。
进一步地,烧结温度为1200℃。
实施例4
一种赤泥烧结骨料,包括如下质量份的原料:赤泥89%,助熔剂2%,钠基膨润土3%,碳粉1%,氧化铝3%,黑泥2%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为2000r/min。
进一步地,烧结温度为1200℃。
实施例5
一种赤泥烧结骨料,包括如下质量份的原料:赤泥90%,助熔剂1%,高岭土1%,碳酸钙1%,氧化铝4%,矿渣3%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为2000r/min。
进一步地,烧结温度为1200℃。
实施例6
一种赤泥烧结骨料,包括如下质量份的原料:赤泥85%,助熔剂1%,高岭土5%,碳化硅1%,氧化铝4%,矿渣4%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为2000r/min。
进一步地,烧结温度为1300℃。
实施例7
一种赤泥烧结骨料,包括如下质量份的原料:赤泥82%,助熔剂3%,生高岭土4%,碳酸钙2%,硅灰石8%,钢渣1%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为4000r/min。
进一步地,烧结温度为1200℃。
实施例8
一种赤泥烧结骨料,包括如下质量份的原料:赤泥78%,助熔剂3%,生高岭土4%,碳酸钙3.5%,碳化硅0.5%硅灰石7%,钢渣4%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为4000r/min。
进一步地,烧结温度为1200℃。
实施例9
一种赤泥烧结骨料,包括如下质量份的原料:赤泥75%,助熔剂5%,钙基膨润土4%,碳酸钙4%,碳化硅1%,硅灰石3%,钢渣8%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述赤泥100目过筛率95%,200目过筛率50%,其它原料100目过筛率100%,200目过筛率90%。
进一步地,所述混料机的转速为4000r/min。
进一步地,烧结温度为1200℃。
对比例1
一种赤泥烧结骨料,包括如下质量份的原料:赤泥80%,钙基膨润土4%,碳酸钙5%,硅灰石3%,钢渣8%。
赤泥烧结骨料的其制备方法为:将所有原料放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述混料机的转速为4000r/min。
进一步地,烧结温度为1200℃。
对比例2
一种赤泥烧结骨料,包括如下质量份的原料:赤泥85%,钙基膨润土4%,硅灰石3%,钢渣8%。所述助熔剂的配备为钾长石20%,锂长石10%,氧化镁40%,锂辉石5%,钠长石15%,硅灰石10%。
赤泥烧结骨料的其制备方法为:将所有原料放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
进一步地,所述混料机的转速为4000r/min。
进一步地,烧结温度为1200℃。
以上实施例和对比例制备的赤泥烧结骨料的产品测试数据如下表所示:
项目 | 筒压强度/Mpa | 吸水率/% | 堆积密度(kg/m<sup>3</sup>) |
实施例1 | 4.6 | 8.8 | 618 |
实施例2 | 7.3 | 7.2 | 735 |
实施例3 | 10.5 | 6.8 | 930 |
实施例4 | 15.8 | 6.3 | 1026 |
实施例5 | 18.9 | 5.2 | 1156 |
实施例6 | 16.9 | 5.8 | 1022 |
实施例7 | 10.2 | 6.9 | 853 |
实施例8 | 6.8 | 6.5 | 722 |
实施例9 | 4.1 | 7.6 | 634 |
对比例1 | 12.6 | 8.2 | 1225 |
对比例2 | 12.3 | 6.2 | 1312 |
由实施例1-9可知,本发明的赤泥烧结骨料吸水率低、堆积密度小。骨料一般用于混凝土中,吸水率过高容易导致混凝土水量添加过多,造成混凝土强度偏低;活易性差,泵送性差,容易有假凝固现象;护过程中泌水,造成混凝土收缩较大;混凝土制备流程增多,前期骨料需要泡水;骨料和水泥的结合度降低,导致混凝土抗折强度下降。堆积密度主要用于配置不同密度等级的混凝土,骨料低密度高强度的时候,可以配置出低密度混凝土和超低密度混凝土等一系列高性能混凝土,满足不同的使用需求。
对比例1未添加助熔剂,其制备的赤泥烧结骨料的堆积密度为1225kg/m3;对比例2未添加助熔剂和发泡剂,其制备的赤泥烧结骨料的堆积密度为1312kg/m3。本案的赤泥烧结骨料由于添加并合理配比了助熔剂和发泡剂,在助熔剂和发泡剂的综合作用下制备的赤泥烧结骨料堆积密度不超过1200kg/m3,具有密度低、强度高等优点。
Claims (10)
1.一种赤泥烧结骨料,其特征在于,包括如下质量分数的原料:赤泥50-90%,助熔剂1-10%,粘接剂1-5%,发泡剂1-15%,硅铝比调节剂3-18%,增强剂1-15%。
2.根据权利要求1所述的赤泥烧结骨料,其特征在于,所述助熔剂的配比为:钾长石10-30%,锂长石5-15%,氧化镁10-40%,锂辉石0-10%,钠长石3-18%,硅灰石0-12%。
3.根据权利要求1所述的赤泥烧结骨料,其特征在于,发泡剂包括煤矸石、碳粉、碳化硅、碳酸钙中的一种或多种。
4.根据权利要求1所述的赤泥烧结骨料,其特征在于,所述硅铝比调节剂包括铝矾土、氧化铝、硅灰石中的一种或多种。
5.根据权利要求1所述的赤泥烧结骨料,其特征在于,所述粘结剂包括钙基膨润土、钠基膨润土、高岭土、生高岭土中的一种或多种。
6.根据权利要求1所述的赤泥烧结骨料,其特征在于,所述增强剂包括粉煤灰、黑泥、矿渣、钢渣中的一种或多种。
7.根据权利要求1所述的赤泥烧结骨料,其特征在于,其制备方法为:将所述原料过筛后按比例放入混料机中混合均匀,混合后造粒,经干燥、烧结后得所述赤泥烧结骨料。
8.根据权利要求7所述的赤泥烧结骨料,其特征在于,所述赤泥100目过筛率95%以上,200目过筛率50%以上,其它原料100目过筛率100%,200目过筛率90%以上。
9.根据权利要求7所述的赤泥烧结骨料,其特征在于,所述混料机的转速为2000-4000r/min。
10.根据权利要求7所述的赤泥烧结骨料,其特征在于,烧结温度为1100-1300℃。
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