| 甘肃某浊沸石尾矿制备陶粒及其性能研究 |
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| 引用本文： | 杨重卿,侯东来,马文博,杨丽艳,李春全,孙志明.甘肃某浊沸石尾矿制备陶粒及其性能研究[J].矿产保护与利用,2021,41(4):93-99. |
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| 作者姓名： | 杨重卿 侯东来 马文博 杨丽艳 李春全 孙志明 |
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| 作者单位： | 1.中国矿业大学(北京) 化学与环境工程学院, 北京 100083 |
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| 基金项目： | 中央高校基本科研业务费专项资金2021JCCXHH04 |
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| 摘 要： | 以甘肃某浊沸石尾矿为原料，凹凸棒石黏土为黏结剂，煤粉为造孔剂，通过高温煅烧工艺制备多孔陶粒，并系统研究了黏结剂添加量、煅烧温度、煅烧时间和煤粉用量等因素对陶粒样品性能的影响规律，得出了优化的制备工艺，并运用SEM、XRD表征手段对样品的微观形貌及物相组成进行检测分析。结果表明:在浊沸石尾矿、凹凸棒石黏土与煤粉的质量比为42.5 GA6FA 42.5 GA6FA 15，煅烧温度1 100℃、煅烧时间30 min、升温速度20℃/min的条件下，制备的陶粒样品的堆积密度692 kg/m3，压裂力116.4 N，吸水率25.3%，筒压强度4.7 MPa，符合国标要求。所制备的浊沸石尾矿陶粒表面多孔，且高温条件下原料中的浊沸石、坡缕石等矿相转化为石英和钠长石。该技术为砂石尾矿综合利用提供了一种有效途径。
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| 关 键 词： | 浊沸石尾矿 陶粒 凹凸棒石黏土 煤粉 综合利用 |
| 收稿时间： | 2021-07-17 |
Study on Preparation of Ceramsite from a Laumontite Tailings from Gansu and Its Performance |
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| YANG Zhongqing,HOU Donglai,MA Wenbo,YANG Liyan,LI Chunquan,SUN Zhiming.Study on Preparation of Ceramsite from a Laumontite Tailings from Gansu and Its Performance[J].Conservation and Utilization of Mineral Resources,2021,41(4):93-99. |
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| Authors: | YANG Zhongqing HOU Donglai MA Wenbo YANG Liyan LI Chunquan SUN Zhiming |
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| Affiliation: | 1.School of Chemical and Environment Engineering, China University of Mining and Technology(Beijing), Beijing 10083, China2.Gansu Construction Investment(Holdings) Group Corporation Mining Co. Ltd, Lanzhou 730000, China |
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| Abstract: | Using some kind of laumontite tailing in Gansu Province as raw material, attapulgite clay as binder, and coal powder as pore-forming agent, the porous ceramsite was prepared by a high-temperature calcination process. The effects of the amount of binder, calcination temperature, calcination time and the amount of pulverized coal on the properties of ceramsite samples were systematically studied, and the optimized preparation process was obtained. The microstructure and phase composition of the samples were detected and analyzed by SEM and XRD characterization methods. The results show that the optimal mass ratio of laumontite tailings, attapulgite clay and coal powder is 42.5 GA6FA 42.5 GA6FA 15, the calcination temperature is 1 100 ℃, the calcination time is 30 min, and the heating rate is 20 ℃/min. The bulk density of the obtained sample prepared under optimal conditions is up to 692 kg/m3, the fracturing force is 116.4 N, the water absorption is 25.3%, and the cylinder compressive strength is 4.7 MPa. The performance meets the requirements of the national standard for the ceramsite. In addition, the prepared ceramsite is porous, and the mineral phases such as laumontite and palygorskite in the raw material are transformed into quartz and albite under high temperature conditions. This technology provides an effective way for the comprehensive utilization of sand and gravel aggregate tailings. |
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