| 磷石膏基矿井充填材料制备及其性能研究 |
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| 引用本文： | 潘祖德,刘琦,曹阳,陈前林,杨敏,谢燕.磷石膏基矿井充填材料制备及其性能研究[J].无机盐工业,2022,54(11):90-95. |
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| 作者姓名： | 潘祖德 刘琦 曹阳 陈前林 杨敏 谢燕 |
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| 作者单位： | 贵州大学化学与化工学院，贵州 贵阳 550025 |
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| 基金项目： | 国家重点研发计划项目(2018YFC1903500);贵州省重大科技专项(黔科合平台人才[2019]5410);贵州省科技厅科技支撑计划项目(黔科合成果[2021]103) |
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| 摘 要： | 为实现磷石膏的资源化利用，制备了以原状磷石膏为主要原料、赤泥为碱性激发剂的矿井充填材料，并分析了高效减水剂掺量、水泥掺量、赤泥掺量对其性能的影响。实验结果表明，水灰质量比为0.2，聚羧酸盐减水剂掺量为0.5%（质量分数）时，浆料的初始流动度约为230 mm，满足充填材料性能要求；水泥掺量从0增加到10%时，28 d抗压强度从2.03 MPa提升至10.75 MPa，初始流动度从180 mm增加到235 mm，强度保持率从0.39提升至1，表明水泥掺量直接影响充填材料的强度、流动性及耐水性能；赤泥掺量从0增加到5%时，28 d抗压强度提升了50%，强度保持率从0.82提升至1，激发作用明显，对材料的流动性有相反的影响。
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| 关 键 词： | 磷石膏 赤泥 碱激发 充填材料 抗压强度 |
| 收稿时间： | 2022-01-20 |
Study on preparation and properties of phosphogypsum based mine filling materials |
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| PAN Zude,LIU Qi,CAO Yang,CHEN Qianlin,YANG Min,XIE Yan.Study on preparation and properties of phosphogypsum based mine filling materials[J].Inorganic Chemicals Industry,2022,54(11):90-95. |
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| Authors: | PAN Zude LIU Qi CAO Yang CHEN Qianlin YANG Min XIE Yan |
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| Affiliation: | College of Chemistry and Chemical Engineering，Guizhou University，Guiyang 550025，China |
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| Abstract: | In order to realize the resource utilization of phosphogypsum，the mine filling materials with the original phosphogypsum as the main raw materials and red mud as the alkaline activator were prepared，and the effects of the dosage of superplasticizer，cement and red mud on its properties were analyzed.The test results showed that when the water-binder ratio was 0.2 and dosage of polycarboxylate superplasticizer was 0.5%（mass fraction），the initial flowability of the slurry was about 230 mm，which met the property requirements of the filling material.When the cement content was increased from 0 to 10%，the 28-day compressive strength was increased from 2.03 MPa to 10.75 MPa，the initial fluidity was increased from 180 mm to 235 mm，and the strength retention rate was increased from 0.39 to 1.It was indicated that the cement content directly affected the strength，fluidity and water resistance of the filling material.When red mud admixture was increased from 0 to 5%，the 28-day compressive strength was increased by 50% and the strength retention was increased from 0.82 to 1.The excitation effect was obvious and had an opposite effect on the flowability of the materials. |
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| Keywords: | phosphogypsum red mud alkali activation filling material compressive strength |
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