【摘要】：新疆某礦中鉛和鋅的品位分別為2.31%、2.51%,鉛和鋅的氧化率分別為84.48%、75.61%,伴生元素鐵和錳的品位分別為27.12%、15.22%,屬于氧化鉛鋅多金屬礦。針對該礦氧化率高、共生元素多、難于回收的特點,對其可選性進行了系統(tǒng)研究。通過對原礦的工藝礦物學(xué)研究,查明了礦物的種類、嵌布狀態(tài)及伴生關(guān)系。研究表明,礦石中的主要金屬礦物有赤鐵礦、針鐵礦、水錳礦、菱錳礦、方鉛礦、黑鋅錳礦、軟錳礦、鉛硬錳礦等,主要脈石礦物有石榴子石、伊利石、方解石、鐵白云石及石英等。礦石中鉛鋅礦物主要是Pb、Zn和MnO2類質(zhì)同象的礦物-鉛硬錳礦和黑鋅錳礦,因此,分選難度較大。鑒于此,本文對以下三種方案:浮選工藝流程;重選-磁選聯(lián)合工藝流程;還原焙燒-磁選工藝流程進行了研究,確定還原焙燒-磁選為最佳流程。并確定還原焙燒-磁選聯(lián)合工藝流程的最佳條件為:還原焙燒時間3小時,溫度1100℃,煤粉用量25%,焙渣磁選磨礦時間1小時,弱磁磁選強度0.2T,強磁磁選強度1.5180T。最終獲得了含鐵68.95%、鐵回收率為80.70%的鐵精礦,含錳31.27%,錳回收率77.40%的錳精礦,鉛、鋅元素可以在還原焙燒過程中的煙道中回收,鉛的揮發(fā)率可達到82.69%,鋅的揮發(fā)率可達到90.99%,選冶技術(shù)指標(biāo)理想,很好的回收了該礦石中的鉛、鋅、鐵、錳。本課題的研究,不僅為該礦山的開發(fā)提供了科學(xué)依據(jù),而且在同類低品位、高氧化率氧化鉛鋅礦的開發(fā)研究方面具有一定的經(jīng)濟意義和理論指導(dǎo)意義。
[Abstract]:The grade of lead and zinc in a certain mine in Xinjiang is 2.31 and 2.51, the oxidation rate of lead and zinc is 84.48 and 75.61, respectively, and the grade of associated elements iron and manganese is 27.12 and 15.22 respectively, belonging to the lead zinc oxide polymetallic ore. Aiming at the characteristics of high oxidation rate, many symbiotic elements and difficult recovery, the selectivity of the ore is studied systematically. Through the study of the process mineralogy of the raw ore, the types of minerals, the distribution state and the associated relationship are found out. The results show that the main metallic minerals in the ore are hematite, goethite, ferromanganese, rhodochrosite, galena, blackzinc-manganese, pyrolusite, lead-permanganite, etc. The main gangue minerals are pomegranate, Illite, calcite, etc. Iron dolomite and quartz etc. The lead-zinc minerals in the ores are mainly the homogenous minerals of PbPb-Zn and MNO _ 2, which are lead-manganite and black-zinc-manganite, so it is difficult to separate them. In view of this, the following three schemes are studied in this paper: flotation process, combined gravity separation and magnetic separation process, and reduction roasting magnetic separation process, and it is determined that reduction roasting magnetic separation is the best process. The optimum conditions are determined as follows: reduction roasting time 3 hours, temperature 1100 鈩，

本文編號：2119808