晶种对高纯铝酸钠溶液碳分产物量化调控的研究

发布时间：2018-09-06 13:37

【摘要】：用晶种量化调控高纯铝酸钠溶液碳分产物,即在碳酸化分解的条件下,加入不同类型、不同量的一水软铝石晶种来诱导Al(OH)-4定向析出一水软铝石,改善产物晶型,粒度,制备出含大量一水软铝石的碳分产品。本文对晶种系数、晶种粒度、机械活化晶种在碳分过程的影响做了相应的研究。结果表明:在分解前中期,添加晶种对分解过程有明显促进作用,且晶种系数(S)增加分解效率提高;当晶种系数S在0.11~0.44增加时,产物中一水软铝石含量增加,且当S=0.44时,含量达到最大值86%,继续增加晶种系数产物中一水软铝石含量变化不大;相对于微米级晶种,添加纳米级一水软铝石晶种在强化铝酸钠溶液聚附,细化晶粒方面更有优势;机械活化后的晶种拥有更强的分解活性,使分解率和一水软铝石含量均有所提高。
[Abstract]:The carbon product of high purity sodium aluminate solution is controlled by seed quantification, that is to say, under the condition of carbonation and decomposition, adding different types and different amount of diaspore crystal seed to induce Al (OH) -4 to precipitate a single boehmite, improve the crystal form and particle size of the product. Carbon products containing a large amount of bauxite were prepared. In this paper, the effects of seed coefficient, seed size and mechanically activated seed on the carbon separation process have been studied. The results showed that the addition of seed significantly promoted the decomposition process before and during the middle period of decomposition, and the seed coefficient (S) increased the decomposition efficiency, and when the seed coefficient S was increased at 0.110.44, the content of bauxite in the product increased, and when the seed coefficient S was 0.44, the content of bauxite in the product increased. The content of octadite in the product of crystal seed coefficient is not changed much, and the addition of nanoscale octadecite has more advantages in strengthening the aggregation of sodium aluminate solution and refining the grain size than that in the micron grade crystal seed, the content of which is up to the maximum of 86% and the increase of the content of octadite in the product of seed coefficient is not obvious. After mechanical activation, the seed has stronger decomposition activity, which increases the decomposition rate and the content of bauxite.
【作者单位】：昆明理工大学冶金与能源工程学院;
【基金】：国家自然科学基金面上项目(No.51374118) 云南省选冶新技术重点实验室开放基金编号:XY2015kf 03
【分类号】：TQ133.1

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