【摘要】：我國高質(zhì)量的石英砂儲(chǔ)存量非常有限,遠(yuǎn)不能滿足社會(huì)對超白玻璃生產(chǎn)的需求,如何將普通石英砂提純到高品質(zhì)的石英砂是當(dāng)今工業(yè)生產(chǎn)面臨的重要問題。提高普通石英砂的品質(zhì)實(shí)質(zhì)上就是大幅度除去石英礦物中除SiO2以外的雜質(zhì),達(dá)到工業(yè)生產(chǎn)對石英砂純度的要求,對超白玻璃而言,主要是Fe雜質(zhì)。本論文以松嶺砂巖為研究對象,采用混合酸浸的方法對石英原料進(jìn)行提純,將松嶺砂中的Fe雜質(zhì)含量降到80ppm以下。研究主要分為以下幾個(gè)方面:(1)采用正交設(shè)計(jì)實(shí)驗(yàn)的方法研究混合酸的用量配比對石英砂中Fe雜質(zhì)去除的影響;(2)酸浸時(shí)間對石英砂中Fe雜質(zhì)去除的影響;(3)超聲波的使用對石英砂中Fe雜質(zhì)去除的影響;(4)煅燒處理對石英砂中Fe雜質(zhì)去除的影響;(5)磁選對石英砂中Fe雜質(zhì)去除的影響。實(shí)驗(yàn)采用原子吸收的方法檢測石英砂中Fe雜質(zhì)含量,用標(biāo)準(zhǔn)篩對原砂進(jìn)行粒度分析,X射線衍射儀進(jìn)行物相分析和SEM-EDS對處理的石英砂進(jìn)行形貌和元素分析。結(jié)果表明:有超聲波和攪拌的條件下,50℃時(shí)酸浸的混酸體積比為酸I:酸II:酸III=8:7:1時(shí)效果最佳,經(jīng)處理23h后石英砂中的Fe含量由原來的2661.25ppm降到60.2ppm;若先經(jīng)470℃煅燒并保溫1h,再經(jīng)混酸處理2h后,石英砂中的Fe雜質(zhì)降到53.3ppm,大大縮短了化學(xué)處理時(shí)間和生產(chǎn)周期;20℃常溫酸浸處理時(shí),由于混酸的活性較低,在有磁選和煅燒的前提下,混酸酸浸2h后,Fe雜質(zhì)降到54.9ppm,滿足超白玻璃用原料(ρFe≤80ppm)的工業(yè)應(yīng)用要求。
[Abstract]:The storage of high quality quartz sand in China is very limited, which is far from meeting the social demand for super white glass production. how to purify ordinary quartz sand into high quality quartz sand is an important problem in industrial production. In essence, improving the quality of ordinary quartz sand is to greatly remove the impurities except SiO2 in quartz minerals, and to meet the requirements of industrial production for the purity of quartz sand. For ultra-white glass, the main impurities are Fe impurities. In this paper, Songling sandstone was used as the research object, and the mixed acid leaching method was used to purify the quartz raw material, and the Fe impurity content in Songling sand was reduced to less than 80ppm. The research is mainly divided into the following aspects: (1) the effect of the ratio of mixed acid on the removal of Fe impurities in quartz sand, (2) the effect of acid leaching time on the removal of Fe impurities in quartz sand, (3) the effect of ultrasonic wave on the removal of Fe impurities in quartz sand, (4) the effect of calcination treatment on the removal of Fe impurities in quartz sand, and (4) the effect of calcination treatment on the removal of Fe impurities in quartz sand. (5) the effect of magnetic separation on the removal of Fe impurities in quartz sand. The content of Fe impurities in quartz sand was determined by atomic absorption spectrometry (AAS). The particle size of the raw sand was analyzed by standard screen, the phase analysis was carried out by X-ray diffractometer and the morphology and element analysis of the treated quartz sand were carried out by SEM-EDS. The results show that under the condition of ultrasonic wave and stirring, the volume ratio of acid leaching to acid I: acid II: acid III=8:7:1 is the best, and the Fe content in quartz sand decreases from the original 2661.25ppm to 60.2 ppm after 23 h treatment, and the Fe impurity in quartz sand is reduced to 53.3ppm after calcination at 470鈩，

本文編號：2505450