CN102964112A - 一种生产轻质保温砖的方法 - Google Patents
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Abstract
一种生产轻质保温砖的方法,涉及一种以铝土矿选尾矿矿浆为原料生产轻质保温砖的方法。其特征在于其制备过程采用铝土矿选尾矿矿浆为原料,在铝土矿选尾矿矿浆中加入选自粉煤灰、漂珠、膨胀珍珠岩、木屑中的两种或两种以上的辅助原料,经高速均化搅拌、加微泡剂混合后,经制坯、坯体干燥、坯体烧结,制得产品。采用本发明的方法生产的产品具有强度高、保温性能好的特征,是市场上急需的无机建筑保温材料,并能免去外墙外保温施工,产品性能达到冬冷夏热地区建筑节能技术要求,具有极强的市场竞争力。
Description
技术领域
一种生产轻质保温砖的方法,涉及一种以铝土矿选尾矿矿浆为原料生产轻质保温砖的方法。
背景技术
我国的铝土矿资源品位普遍较低,选矿技术在提高铝土矿品位,降低氧化铝生产成本等方面具有重要的意义。随着铝土矿选矿厂的不断兴建和运行,铝土矿选尾矿的处理与处置问题日益突出。由于选矿后铝土矿尾矿颗粒细,粘度大,脱水困难。目前选矿尾矿多以自然堆积法储存于尾矿坝或赤泥库中,占用了大量土地。选尾矿是以铝硅酸盐矿物为主的微细粒颗粒,具有高比表面积,高载能的特点,有广阔的应用前景。开展铝土矿选尾矿综合利用技术研究和实践,提高铝土矿的综合利用率,可以带来良好的环境效益和经济效益。
自保温墙体是指由单一材质制成的有一定保温隔热能力的墙体材料,利用墙体材料本身的保温隔热功能,实现建筑节能目标。大量的实践证明,墙体自保温系统综合成本和性能优于外墙外保温系统。自保温墙体热工性能稳定,不受施工质量的影响;施工作业简单,无需二道工序,避免了二次装修对内保温材料的破坏作用;排除了外保温材料耐久性不能与建筑物使用寿命相一致的矛盾;能解决高层建筑的墙体保温隔热问题;通过材料块体结构形式的设计,可以解决外墙渗漏问题。
发明内容
本发明的目的就是针对上述已有技术存在的不足,提供一种低能耗、高效率,有效利铝土矿选尾矿生产强度和保温性能的生产轻质保温砖的方法。
本发明的目的是通过以下技术方案实现的。
一种生产轻质保温砖的方法,其特征在于其制备过程采用铝土矿选尾矿矿浆为原料,在铝土矿选尾矿矿浆中加入选自粉煤灰、漂珠、膨胀珍珠岩、木屑中的两种或两种以上的辅助原料,经高速均化搅拌、加微泡剂混合后,经制坯、坯体干燥、坯体烧结,制得产品。
本发明的一种生产轻质保温砖的方法,其特征在于所述的铝土矿选尾矿矿浆的重量固含为60%-40%。
本发明的一种生产轻质保温砖的方法,其特征在于所述的铝土矿选尾矿矿浆为氧化铝生产过程赤泥降分离的浓缩池底流。
本发明的一种生产轻质保温砖的方法,其特征在于所述的辅助原料用量为尾矿干重的40%-80%。
本发明的一种生产轻质保温砖的方法,其特征在于所述的微泡剂是膨胀珍珠岩、玻璃漂珠、粉煤灰、碳粉和生物质等中的一种或一种以上,与水玻璃、碳化硅、偶氮化合物、磺酰肼类化合物、亚硝基化合物中的一种或一种以上共同使用,加入量为原料总质量的1%-30%。
本发明的一种生产轻质保温砖的方法,其特征在于所述的坯体烧结制度为:烧制温度为850oC—1050oC,烧制时间为2h-5h,升温和降温速率不大于3oC/min。
本发明的一种生产轻质保温砖的方法,通过使用粉煤灰、珍珠岩等形成骨架结构,并配合化学发泡剂形成封闭的微孔结构,使用高速均化搅拌设备使物料混合均匀,在制品内部形成大小微孔的组合,实现了制品强度和保温性能的双重达标。
本发明的一种生产轻质保温砖的方法,直接利用尾矿浓缩底流,省却了尾矿脱水工序;利用使用物料粒径细小、流动性较好的特征,使用高速强力搅拌达到尾矿与粉煤灰等干湿辅料充分混合的目的;加入适量微泡剂,配合粉煤灰、木屑等造孔剂,达到形成砖体内微孔结构的目的,保障了制品较低的密度,并具有良好的保温效果;产品具有强度高、保温性能好的特征,是市场上急需的无机建筑保温材料,并能免去外墙外保温施工,具有极强的市场竞争力。
具体实施方式
一种生产轻质保温砖的方法,氧化铝生产过程赤泥降分离的浓缩池底流输送至搅拌槽,加入粉煤灰、膨胀珍珠岩、膨胀珍珠岩、木屑等物质,经高速均化搅拌并加入适量微泡剂,混合料浆直接输送至挤条机,经切割后,坯体干燥,烧结,制得产品。
一种生产轻质保温砖的方法,其浓缩池中的选矿浆不经脱水直接利用,底流含固率为60%-40%。;所使用的辅助原料包括膨胀珍珠岩、玻璃漂珠、粉煤灰、碳粉和生物质等中的一种或一种以上,与水玻璃、碳化硅、偶氮化合物、磺酰肼类化合物、亚硝基化合物中的一种或一种以上共同使用,加入量为原料总质量的1%-30%。,使用高速强力搅拌设备实现物料的均化;高速强力搅拌过程中加入适量微泡剂;砖坯的烧制制度为:850oC—1050oC,烧制保温时间为2h-5h,升温和降温速率不大于3oC/min。
实施例1
取河南某铝土矿选矿厂尾矿底流20L(固含60%),碳粉和聚氨酯发泡剂各按总物料质量的10%加入,经高速搅拌混合物料。使用挤条机挤出、切割后,砖坯干燥、烧制。砖坯的烧制制度为:850oC,烧制保温时间为5h,升温和降温速率3oC/min。制品经检测,抗压强度18.2MPa;传热系数≤0.34 W/(m·K),比重0.67。产品性能达到冬冷夏热地区建筑节能技术要求。
实施例2
取河南某铝土矿选矿厂尾矿底流20L(固含45%),粉煤灰、膨胀珍珠岩和动物性发泡剂各按总物料质量的10%加入,经高速搅拌混合物料。使用挤条机挤出、切割后,砖坯干燥、烧制。砖坯的烧制制度为:1050oC,烧制保温时间为2h,升温和降温速率1.5oC/min。制品经检测,抗压强度18.2MPa;传热系数0.5 W/(m·K),比重0.78。
实施例3
取河南某铝土矿选矿厂尾矿底流20L(固含40%),漂珠和混凝土发泡剂各按总物料质量的0.5%加入,经高速搅拌混合物料。使用挤条机挤出、切割后,砖坯干燥、烧制。砖坯的烧制制度为:950oC,烧制保温时间为3h,升温和降温速率2oC/min。制品经检测,抗压强度25.2MPa;传热系数0.36 W/(m·K),比重0.58。
以上所述为本发明的较佳实施例而已,但本发明不应该局限于该实施例所公开的内容。所以凡是不脱离本发明所公开的精神下完成的等效或修改,都落入本发明保护的范围。
Claims (6)
1.一种生产轻质保温砖的方法,其特征在于其制备过程采用铝土矿选尾矿矿浆为原料,在铝土矿选尾矿矿浆中加入选自粉煤灰、漂珠、膨胀珍珠岩、木屑中的两种或两种以上的辅助原料,经高速均化搅拌、加微泡剂混合后,经制坯、坯体干燥、坯体烧结,制得产品。
2.根据权利要求1所述的一种生产轻质保温砖的方法,其特征在于所述的铝土矿选尾矿矿浆的重量固含为60%-40%。
3.根据权利要求1所述的一种生产轻质保温砖的方法,其特征在于所述的铝土矿选尾矿矿浆为氧化铝生产过程赤泥降分离的浓缩池底流。
4.根据权利要求1所述的一种生产轻质保温砖的方法,其特征在于所述的辅助原料用量为尾矿干重的40%-80%。
5.根据权利要求1所述的一种生产轻质保温砖的方法,其特征在于所述的微泡剂是膨胀珍珠岩、玻璃漂珠、粉煤灰、碳粉和生物质中的一种或一种以上,与水玻璃、碳化硅、偶氮化合物、磺酰肼类化合物、亚硝基化合物中的一种或一种以上共同使用,加入量为原料总质量的1%-30%。
6.根据权利要求1所述的一种生产轻质保温砖的方法,其特征在于所述的坯体烧结制度为:烧制温度为850oC—1050oC,烧制时间为2h-5h,升温和降温速率不大于3oC/min。
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CN106316441A (zh) * | 2016-08-23 | 2017-01-11 | 福建省德化县富盛陶瓷有限公司 | 引入铝土尾矿制坯的多孔隙保温陶瓷及制备方法 |
CN106588068A (zh) * | 2016-12-10 | 2017-04-26 | 广东旺企科技服务有限公司 | 一种轻质隔热砖的生产工艺 |
CN110105083A (zh) * | 2019-05-24 | 2019-08-09 | 中国地质大学(北京) | 赤泥基保温材料及其制备方法和应用 |
CN111620671A (zh) * | 2020-05-21 | 2020-09-04 | 中铝山西新材料有限公司 | 一种赤泥基透水砖及其制备方法 |
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CN114480841B (zh) * | 2022-01-27 | 2024-04-19 | 中钢集团马鞍山矿山研究总院股份有限公司 | 一种电炉除尘灰及其提铁尾渣全量化、高值利用方法 |
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