钾长石水热制备钾霞石体系滤液循环实验研究

Experimental study on circulation of filtrate of potassium feldspar hydrothermal preparation of kaliophilite system

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DOI 10.20086/j.cnki.yskw.2025.4173
刊名
Acta Petrologica et Mineralogica
年,卷(期) 2025, 44(1)
作者
作者单位

河南科技大学化学化工学院, 河南 洛阳 471000

摘要
为提高水热法制备钾霞石工艺中钾长石硅的利用率及解决该工艺所产生的碱性废液问题,本研究进行了钾长石水热制备钾霞石体系滤液循环实验,探讨了反应时间、反应温度、硅铝比SiO2与Al(OH)3的摩尔比、碱浓度对硅的利用率及产物结构的影响,并对反应历程进行了探究。通过对最优条件下的滤液进行循环实验,探究了循环次数对硅的利用率、产物结构以及工艺稳定性的影响规律,并对改进前后的工艺流程作了对比。结果表明,当反应时间4.0 h、反应温度280℃、硅铝比0.8、碱浓度12 mol/L时,钾长石中硅的利用率可达94.2%,较工艺改进前提高了60%,产物钾霞石物相均一、品质优异,循环工艺稳定。
Abstract
To enhance the utilization ratio of silicon from potassium feldspar in the hydrothermal synthesis process of kaliophilite and address the issue of alkaline waste liquid produced by this process, this research carried out the filtrate recycling experiment in the hydrothermal synthesis system of potassium feldspar to kaliophilite. The effects of reaction time, reaction temperature, the molar ratio of SiO2 to Al(OH)3 and alkali concentration on Si utilization and product structure were discussed, as well as by investigating the reaction process. The effect of the number of cycles on the utilization ratio of silicon, the structure of the product and the stability of the process were investigated by the circulating experiment of the filtrate under the optimal conditions. The reaction mechanism was further explored and the process before and after the improvement was compared. The results demonstrate that when the reaction time was 4.0 h, the reaction temperature was 280℃, the molar ratio of SiO2 to Al(OH)3 was 0.8, and the alkali concentration was 12 mol/L, the utilization ratio of silicon in potassium feldspar could attain 94.2%, representing an increase of 60% compared to the process was improved. The product kaliophilite was homogeneous, superior quality and the recycling process was stable.
关键词
钾长石;水热法;钾霞石;循环滤液;利用率;稳定性
KeyWord
potassium feldspar; hydrothermal method; kaliophilite; circulating filtrate; utilization ratio; stability
基金项目
页码 207-215
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霍光祥,路华龙,段永华*,勾明雷,高嘉屿,陈紫宛. 钾长石水热制备钾霞石体系滤液循环实验研究 [J]. 岩石矿物学杂志. 2025; 44; (1). 207 - 215.

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