| 电石渣烧结法从赤泥回收氧化铝 |
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| 引用本文： | 纪利春,相亚军. 电石渣烧结法从赤泥回收氧化铝[J]. 无机盐工业, 2016, 48(2): 68 |
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| 作者姓名： | 纪利春 相亚军 |
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| 作者单位： | 1.内蒙古工业大学化工学院，内蒙古呼和浩特 010062；2.内蒙古工业大学能源与动力工程学院 |
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| 摘 要： | 拜耳法赤泥中含有一定数量的氧化铝，从赤泥中回收氧化铝对于节约资源、改善环境、实现可持续发展都具有重要的意义。实验以电石渣为助剂活化赤泥，并考察了活化条件和浸出条件对赤泥中氧化铝浸出率的影响。实验得到最佳活化条件：电石渣与赤泥质量比为2.5、烧成温度为1 250 ℃、烧成时间为120 min。最佳浸出条件：浸出温度为85 ℃、浸出时间为120 min、Na2CO3质量分数为8%、液固比为3.0。在此条件下，赤泥中氧化铝的浸出率高达88.1%，得到的浸出残渣是一种良好的水泥混合材料。
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| 关 键 词： | 赤泥 浸出率 浸出 氧化铝 烧结法 |
Alumina recovery from red mud by sintering method of carbide slag |
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| JI Li-Chun,XIANG Ya-Jun. Alumina recovery from red mud by sintering method of carbide slag[J]. Inorganic Chemicals Industry, 2016, 48(2): 68 |
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| Authors: | JI Li-Chun XIANG Ya-Jun |
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| Affiliation: | 1.College of Chemical Engineering，Inner Mongolia University of Technology，Hohhot 010062，China；2.College of Energy and Power Engineering，Inner Mongolia University of Technology |
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| Abstract: | A certain number of aluminum is in the red mud derived from Bayer process.It has important meaning to extractalumina from the red mud for saving resources，protecting environment，and achieving sustainable development.The conditionsof calcining activation of red mud with carbide slag as assistant and extracting alumina were studied.The effects of conditions of calcining activation and leaching on the leaching rate of alumina from red mud were investigated.Experimental results showed that the optimum conditions of calcining activation were：mass ratio of carbide slag to red mud of 2.5，calcination tem-perature of 1 250 ℃，and calcination time of 120 min；the best technological conditions of leaching were as follows：under liq-uid-to-solid ratio of 3.0，alumina leaching efficiency of 88.1% was achieved when clinker was leached with 8%（mass fraction）of Na2CO3 at 85 ℃ for 120 min.The digestion residue could be used as a good admixture of cement. |
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| Keywords: | red mud leaching efficiency extraction alumina sintering method |
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