CAJ | 학술논문

为了解决我国大量的难溶性含钾矿物未能有效提钾利用的问题,采用氧化法从水云母中提取可溶性钾离子,确定了反应温度、反应时间和交换阳离子(钡离子)的最佳工艺条件.用X-射线衍射图谱和X-光电子能谱手段研究氧化过程机理及云母结构的细微变化. 结果表明,在反应温度为45 ℃,反应时间为3 h,钡离子摩尔质量为0.035 mol时,提钾效果最好.提出了库伦效应提钾机理:水云母八面体空隙内的三价钒离子氧化为五价钒离子后,减弱四面体层对钾离子的库仑力束缚,选择交换阳离子进行交换,在不破坏水云母结构的前提下,可以达到提钾的目的.采用氧化法从水云母中提钾,提钾率可以达到35%左右.
위료해결아국대량적난용성함갑광물미능유효제갑이용적문제,채용양화법종수운모중제취가용성갑리자,학정료반응온도、반응시간화교환양리자(패리자)적최가공예조건.용X-사선연사도보화X-광전자능보수단연구양화과정궤리급운모결구적세미변화. 결과표명,재반응온도위45 ℃,반응시간위3 h,패리자마이질량위0.035 mol시,제갑효과최호.제출료고륜효응제갑궤리:수운모팔면체공극내적삼개범리자양화위오개범리자후,감약사면체층대갑리자적고륜력속박,선택교환양리자진행교환,재불파배수운모결구적전제하,가이체도제갑적목적.채용양화법종수운모중제갑,제갑솔가이체도35%좌우.
To solve the problem that large amount of insolubility potash resources are not utilized effectively in China,oxidation methods were used to extract soluble potassium ions from hydromica. The effects of the using quantity of cation-exchanger (barium ions), reaction temperature and reaction time on the optimum reaction conditions were explored. The oxidation mechanism and the changes of chemical structure in hydromica were investigated by X-ray diffraction spectrometry and X-ray photoelectron spectrometry. The result shows that the rate of extracting potassium is high when the mass ratio of barium ions is 0.035, the reaction temperature is 45℃ and the reaction time is 3 h. The coulomb effect was proposed to interpret the extraction mechanism: the oxidation of trivalent vanadium ions in octahedral site to tetravalent vanadium ions weakened the electrostatic force between potassium ion and tetrahedral sheet, then the exchange cations were introduced to extract potassium without damaging hydromica's structure. The extracting ratio of potassium from hydromica reaches 35%by using oxidation methods.