本文選題：金礦　切入點(diǎn)：石英　出處：《西南科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：某金礦位于川北地區(qū),黃鐵礦是主要的載金礦物,與黃鐵礦共生的是大量的塊狀石英及鱗片狀絹云母等非金屬礦物。目前,石英和絹云母在選金過程中以尾礦的形式排出,未得到有效的開發(fā)利用。因此,論文對(duì)該地區(qū)石英及絹云母礦物資源綜合利用進(jìn)行了研究。先將原礦破碎,使白色石英顆粒與灰黑色絹云母集合體解離開,然后用色選機(jī)將顆粒石英分選出,再對(duì)顆粒石英進(jìn)行深加工研究。對(duì)篩分出的三個(gè)粒級(jí)(20~10mm、10~5mm、5~2.5mm)分別進(jìn)行色選,結(jié)果表明:粒度越小,石英精礦的產(chǎn)率和回收率越大,色選出的石英精礦可達(dá)到國(guó)家標(biāo)準(zhǔn)一等品的質(zhì)量要求;對(duì)石英精礦煅燒水淬后磨礦試驗(yàn)表明:1.0h后-0.0375mm的產(chǎn)率達(dá)到88.22%,比未煅燒的石英磨礦效率高;對(duì)煅燒水淬球磨后的石英粉用濃度為15%的鹽酸酸洗3.0h后,Fe2O3含量由1031.9ppm降低至247ppm;對(duì)除鐵后的石英粉進(jìn)行濕法超細(xì)加工的結(jié)果表明:在礦漿濃度50%,研磨2.0h后,石英粒度由D90=40.08μm下降到D90=9.284μm,滿足市場(chǎng)對(duì)超細(xì)石英粉的粒度要求;用KH-550硅烷偶聯(lián)劑對(duì)超細(xì)石英粉進(jìn)行改性的結(jié)果表明:當(dāng)偶聯(lián)劑用量為2.0%,溫度110℃,改性8.0h時(shí),可獲得較好的改性石英粉產(chǎn)品。對(duì)從選金尾礦中浮選絹云母的研究結(jié)果表明:在礦漿濃度30%、p H=3.0、捕收劑FWY-5用量為400g/t時(shí),可獲得回收率為75.60%,品位為71.90%的絹云母粗精礦,通過一粗兩精一掃的閉路浮選試驗(yàn)選出的絹云母精礦產(chǎn)品達(dá)到行業(yè)牌號(hào)MCA-1的質(zhì)量要求;用濃度為20%的鹽酸對(duì)浮選出的絹云母精礦進(jìn)行酸洗除鐵5.0h后,Fe2O3由8.72%降低到6.62%,白度僅提高4.5%,說明絹云母用酸洗除鐵的效果不好;對(duì)除鐵后的絹云母進(jìn)行濕法攪拌超細(xì)加工試驗(yàn)結(jié)果表明:在礦漿濃度50%,研磨2.0h時(shí),粒度由D90=74.85μm下降到D90=19.20μm,滿足市場(chǎng)上對(duì)超細(xì)絹云母粉的粒度要求;用KH-550硅烷偶聯(lián)劑對(duì)絹云母粉進(jìn)行改性試驗(yàn)結(jié)果表明:當(dāng)偶聯(lián)劑用量為2.0%,120℃條件處理8.0h時(shí)的改性效果較好。并對(duì)石英和絹云母與混合捕收劑FWY-5的作用機(jī)理、用KH-550偶聯(lián)劑對(duì)石英和絹云母進(jìn)行改性的機(jī)理作了初步的探討。
[Abstract]:A certain gold deposit is located in the north of Sichuan. Pyrite is the main gold bearing mineral, and there are a large number of massive quartz and scale sericite and other non-metallic minerals associated with pyrite. At present, quartz and sericite are discharged in the form of tailings during the gold separation process. Therefore, the comprehensive utilization of quartz and sericite mineral resources in this area has been studied in this paper. Then the granular quartz is separated out by color separator, and the further processing of granular quartz is carried out. The results show that the smaller the particle size, the greater the yield and recovery rate of quartz concentrate. The quartz concentrate selected by color can meet the quality requirements of the first grade of national standard, and the grinding test of quartz concentrate after calcination and quenching shows that the yield of -0.0375mm after 1.0 h is 88.22, which is higher than that of quartz without calcination. The content of Fe _ 2O _ 3 was reduced from 1031.9ppm to 247ppm for the calcined water quenched quartzite powder after acid pickling with 15% hydrochloric acid for 3.0h. The results of wet ultrafine processing of the quartzite powder after iron removal showed that the concentration of slurry was 50 and the grinding time was 2.0 hours. The particle size of quartz decreased from 40.08 渭 m to 9.284 渭 m, which met the requirement of the market for ultrafine quartz powder. The results of modification of ultrafine quartz powder with KH-550 silane coupling agent showed that when the amount of coupling agent was 2.0, the temperature was 110 鈩，

本文編號(hào)：1583726