CN101328035B - 一种粉煤灰空心微珠表面改性增白的方法 - Google Patents
一种粉煤灰空心微珠表面改性增白的方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004005 microsphere Substances 0.000 title abstract 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
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- 239000003245 coal Substances 0.000 claims description 32
- 239000011325 microbead Substances 0.000 claims description 32
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 claims description 11
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 11
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 11
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- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
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- 239000005060 rubber Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1074—Silicates, e.g. glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
本发明涉及到一种粉煤灰空心微珠表面改性增白的方法,属于矿物材料加工与环境治理领域。将粉煤灰空心微珠加水进行搅拌分散、调节pH值后加入硫酸铝和水玻璃溶液进行沉淀反应,在粉煤灰空心微珠表面包覆硅酸铝;加完硫酸铝和水玻璃溶液后反应一定时间,将反应产物过滤、洗涤、干燥、解聚即得增白的粉煤灰空心微珠。
Description
1.技术领域
本发明涉及一种粉煤灰空心微珠表面改性增白的方法,属于矿物材料加工与环境治理领域。
2.背景技术
粉煤灰是燃煤电厂排放的工业灰渣,它不仅占用了大量的土地资源用于堆放,还造成了严重的环境污染,因此从经济和环保角度出发,开展粉煤灰的综合利用研究具有重大意义。粉煤灰空心微珠是从粉煤灰中提选出来的一种新型多功能颗粒材料。它具有体轻、粒径小、耐磨性强、抗压强度高、分散性及流动性好、反光、无毒等优异性能,可代替制造成本较高的人造空心微珠应用到建材、橡胶、塑料、航空航天、电子等领域,发挥出其原料丰富、价格低廉的优势。但由于其色泽不好,呈灰色或土黄色,不能用于填充艳色或浅色塑料或橡胶制品,不能用作浅色涂料,影响了其应用范围的扩大。对其进行表面改性与增白,可以提高其遮盖力、着色力和耐侯性。这不但可以解决粉煤灰堆积占地的环境问题,而且可以改善橡胶,塑料和涂料的性能,降低工业成本。目前已有用碳酸钙包覆改性粉煤灰进行增白的研究报道。但是,用碳酸钙包覆粉煤灰存在的问题是包覆后的材料不耐酸,在酸性环境中性能不稳定。
本发明的目的是针对目前粉煤灰空心微珠白度低及其改性增白方法的不足提出一种利用硅酸铝包覆粉煤灰空心微珠增白的方法。由于硅酸铝成分与粉煤灰空心微珠相同,而且其主要用于橡胶、造纸、油墨、油漆等行业,尤其是室内外无光、半光溶剂漆中作为钛白增效剂取代15%~20%钛白粉,不仅可以大幅度降低制漆成本,且能明显改善漆用性能(如白度,干膜遮盖力,储存稳定性,耐侯性)和涂料施工性能。用硅酸铝包覆空心微珠不仅保留了空心微珠原有的性能,而且改性原料硫酸铝和水玻璃来源广泛,价格低廉;此外,硅酸铝具有耐酸性和化学性质稳定等优点。本发明对于粉煤灰空心微珠表面改性增白技术的进步及其空心微珠深加工利用具有重要意义。
3.发明内容
将粉煤灰空心微珠加水进行搅拌分散、调节pH值后加入硫酸铝和水玻璃溶液进行沉淀反应,在粉煤灰空心微珠表面包覆硅酸铝,加完硫酸铝和水玻璃溶液后反应一定时间,将反应产物过滤、洗涤、干燥、解聚即得增白的粉煤灰空心微珠。
其工艺步骤如下:
(1)将粉煤灰空心微珠加水进行搅拌分散。
(2)调节空心微珠悬浮液的pH值。
(3)向上述悬浮液中加入硫酸铝和水玻璃进行沉淀反应,在粉煤灰空心微珠表面沉淀包覆硅酸铝。
(4)加入完硫酸铝和水玻璃后反应一定时间。
(5)将步骤(4)产物过滤、洗涤,然后干燥。
(6)将步骤(5)的产物进行解聚,即得表面改性增白的粉煤灰空心微珠。
以下为本发明的配方和主要工艺条件:
(1)搅拌分散
搅拌分散作业:浓度=5%~40%;温度20~95℃;搅拌时间5~20min。
(2)调节pH值
pH=6~11。
(3)加入硫酸铝溶液和水玻璃溶液进行沉淀反应
硫酸铝浓度0.1~1mol/l;水玻璃模数SiO2:Na2O=1.0~3.4;水玻璃浓度0.2~2mol/l;Al:Si=1:1~1:4;硅酸铝:硅酸铝与粉煤灰空心微珠质量比为:硅酸铝:粉煤灰空心微珠=0.1~1:1。
(4)反应时间20~120min。
(5)反应产物过滤、干燥与解聚
用本发明表面改性后的粉煤灰空心微珠,空心微珠表面上均匀包覆了硅酸铝纳米粒子。
本发明的优点:一是水玻璃和硫酸铝在我国来源广泛,价格低廉;二是硅酸铝的成分和粉煤灰成分相同,不改变其原有性能;三是硅酸铝耐酸,化学性质稳定。
4.附图内容
附图1是本发明的工艺流程,附图2是本发明实施例改性后的空心微珠SEM图。
5.具体实施方式
实施例一:取粉煤灰空心微珠14.1g,加水126.9mL、用氢氧化钠调节pH至10,搅拌分散后同时加入配制好的浓度为1mol/l的水玻璃溶液400mL和浓度0.125mol/l的硫酸铝溶液400ml,反应温度80℃,反应时间1h;将反应产物过滤、在105℃下干燥后解聚,即得表面改性增白的粉煤灰空心微珠。
实施例二:取粉煤灰空心微珠141.0g,加水1250mL、用氢氧化钠调节pH至9,搅拌分散后同时加入配制好的浓度为1mol/l的水玻璃溶液4000mL和浓度0.125mol/l的硫酸铝溶液4000ml,反应温度85℃,反应时间75min;将反应产物过滤、在105℃下干燥后解聚,即得表面改性增白的粉煤灰空心微珠。
表1为实施例所得产品及原料的检测结果。
表1实施例样品及原料的检测分析结果
Claims (5)
1.一种粉煤灰空心微珠表面改性增白的方法,其特征在于其工艺步骤为:
将粉煤灰空心微珠加水进行搅拌分散;调节pH值至6~11后加入硫酸铝和水玻璃溶液进行沉淀反应,在粉煤灰空心微珠表面包覆硅酸铝;加完硫酸铝和水玻璃溶液后继续反应一定时间;将反应产物过滤、洗涤、干燥、解聚即得增白的粉煤灰空心微珠。
2.根据权利要求1所述的粉煤灰空心微珠表面改性增白的方法,其特征是所述的粉煤灰空心微珠搅拌分散,其工艺条件为:浓度=5%~40%;温度20~95℃;搅拌时间5~20min。
3.根据权利要求1所述的粉煤灰空心微珠表面改性增白的方法,其特征是所述的加入硫酸铝溶液和水玻璃溶液进行沉淀反应,其工艺条件为:硫酸铝浓度0.1mol/l~1mol/l;水玻璃模数SiO2∶Na2O=1.0~3.4;水玻璃浓度0.2mol/l~2mol/l;Al∶Si=1∶1~1∶4。
4.根据权利要求1所述的粉煤灰空心微珠表面改性增白的方法,其特征是所述的在粉煤灰空心微珠表面包覆硅酸铝,其硅酸铝与粉煤灰空心微珠质量比为:硅酸铝∶粉煤灰空心微珠=0.1~1∶1。
5.根据权利要求1所述的粉煤灰空心微珠表面改性增白的方法,其特征是所述的加完硫酸铝和水玻璃溶液后继续反应一定时间,其工艺条件为:反应时间20~120min。
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CN105293991A (zh) * | 2015-10-16 | 2016-02-03 | 卓达新材料科技集团威海股份有限公司 | 填料用改性剂及其填料的制备方法 |
CN106746716A (zh) * | 2017-01-13 | 2017-05-31 | 爱乐彩(天津)新材料科技有限公司 | 一种高利用率的粉煤灰空心玻璃微珠增白方法 |
CN109650786A (zh) * | 2018-12-06 | 2019-04-19 | 安徽米方石材有限公司 | 含纳米硫酸钙/氢氧化铝包覆粉煤灰的相变型保温人造石英石及其制备方法 |
CN111360024B (zh) * | 2020-03-12 | 2021-12-24 | 浙江美臣新材料科技有限公司 | 一种深度脱除工业废渣可溶组分的方法 |
CN114351992B (zh) * | 2022-02-22 | 2023-09-22 | 瑞宇建设有限公司 | 节能砌块装饰的复合外墙施工方法 |
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