本文選題：多金屬硫化礦 + 部分混合浮選　； 參考：《西安建筑科技大學(xué)》2015年碩士論文

【摘要】：泡沫浮選已有百年歷史,銅鉛鋅多金屬硫化礦的浮選分離卻一直是選礦界的一大難題。此研究為甘肅省天水某多金屬硫化礦,是一個(gè)以金、銀、鉛、鋅元素為主,伴生銅的大型礦床,礦石中主要金屬礦物有方鉛礦、閃鋅礦和黃鐵礦,其次有銀黝銅礦,黃銅礦;脈石礦物主要是石英、絹云母,其次是碳酸鹽礦物、綠泥石。原礦工藝礦物學(xué)研究結(jié)果表明,大部分的銅、鉛、鋅礦物粒度較粗易選,但也存在復(fù)雜性,如方鉛礦包裹粒度不等的銀黝銅礦;銀黝銅礦包裹細(xì)粒(多0.05mm)方鉛礦、黃銅礦和黃鐵礦;部分黃銅礦也包裹粒度較細(xì)的方鉛礦,這種相互包裹關(guān)系會(huì)影響銅精礦質(zhì)量。部分閃鋅礦中包裹細(xì)粒方鉛礦較難解離,也易造成鋅精礦含鉛高;閃鋅礦包裹部分細(xì)粒銀黝銅礦,閃鋅礦也包裹銀金礦,會(huì)使部分銀和金損失到鋅精礦中。銀主要賦存在銀黝銅礦中,因此銀主要將隨銅精礦的富集而富集。貴金屬則主要富集在銅精礦和硫精礦中。針對(duì)目的礦物賦存狀態(tài)特點(diǎn),研究出順應(yīng)礦石性質(zhì)、技術(shù)經(jīng)濟(jì)合理的選礦工藝流程,以充分提高資源綜合的回收。通過(guò)探討研究和各方案對(duì)比,最終采用“部分混合浮選”流程處理該礦石。即先銅鉛混合浮選,后浮鋅,再將銅鉛混合精礦進(jìn)行銅鉛分離。浮選磨礦細(xì)度為-0.074mm70%,選用石灰作pH值調(diào)整劑、膠體碳酸鋅(硫酸鋅、碳酸鈉)為抑鋅藥劑、乙黃藥為銅鉛混浮捕收劑、硫酸銅為選鋅活化劑、丁基黃藥為選鋅捕收劑、2#油為起泡劑。對(duì)銅鉛混合精礦進(jìn)行銅鉛分離浮選時(shí),采用活性炭脫藥,CMC、水玻璃、亞硫酸鈉組合藥劑抑鉛浮銅,Z-200為銀銅精礦捕收劑,在確定了最佳工·藝條件后進(jìn)行了開(kāi)路試驗(yàn),獲得了銅精礦含銅17.47%,回收率為61.12%;鉛精礦含鉛59.58%,回收率為85.82%;鋅精礦含鋅57.36%,回收率76.49%的指標(biāo)。最終閉路試驗(yàn)獲得銀銅精礦含銅14.55%、含銀44543g/t、含金124.27 g/t,銅、銀和金回收率分別為75.47%、83.97%和65.12%;鉛精礦含鉛56.68%,鉛回收率為92.09%;鋅精礦含鋅53.56%,回收率76.58%;金總回收率93.72%,銀總回收率91.71%。試驗(yàn)指標(biāo)較為理想。
[Abstract]:Although foam flotation has a history of one hundred years, flotation separation of copper, lead and zinc polymetallic sulphide ores has always been a difficult problem in the field of mineral processing. This study is a polymetallic sulphide ore deposit in Tianshui, Gansu Province, which is a large deposit consisting mainly of gold, silver, lead, zinc and associated copper. The main metallic minerals in the ore are galena, sphalerite and pyrite, followed by silver tetrahedrite and chalcopyrite. Gangue minerals are mainly quartz, sericite, followed by carbonate minerals, chlorite. The results of mineralogical study show that most of the copper, lead and zinc minerals are relatively coarse and easy to be separated, but there are also some complexities, such as galena encapsulating silver tetrahedrite with different granularity, silver tetrahedrite coated with fine galena (0.05mm more than 0.05mm), Chalcopyrite and pyrite, and some chalcopyrite also contain finer galena, which will affect the quality of copper concentrate. It is difficult to dissociate the fine galena in some sphalerite, and it is easy to cause the zinc concentrate to contain high lead, while the sphalerite encapsulates some fine silver tetrahedrite and the sphalerite also encapsulates the silver gold deposit, which will lead to the loss of some silver and gold to the zinc concentrate. Silver mainly occurs in silver tetrahedrite, so silver will mainly be enriched with the enrichment of copper concentrate. Precious metals are mainly concentrated in copper concentrate and sulfur concentrate. According to the characteristics of the state of occurrence of the target minerals, the processing process of mineral processing, which conforms to the properties of the ore and is reasonable in technology and economy, is studied in order to fully improve the comprehensive recovery of resources. The ore was treated by partial mixed flotation process through discussion and comparison of various schemes. First, copper and lead are mixed flotation, then zinc is floated, then copper-lead mixed concentrate is separated from copper-lead. The fineness of flotation grinding is -0.074 mm70. Lime is used as pH adjuster, colloidal zinc carbonate (zinc sulfate, sodium carbonate) as zinc inhibitor, ethyl xanthate as copper and lead mixed flotation collector, copper sulfate as zinc concentration activator. Ding Ji xanthate was used as zinc collector and oil as foaming agent. In the separation and flotation of copper and lead concentrate, activated carbon demineralizing agent (CMC), sodium sulfite (sodium sulfite) and CMC (sodium sulfite) were used as collector for silver copper concentrate. The open circuit test was carried out after determining the optimum technical conditions. The recovery rate of copper concentrate is 61.12%, that of lead concentrate is 59.58% and that of zinc concentrate is 85.82%, and that of zinc concentrate is 57.36% with a recovery rate of 76.49%. The final closed circuit test showed that the silver copper concentrate contained 14.55 copper, silver 44543 g / t, gold 124.27 g / t, the recoveries of copper, silver and gold were 75.4747% 83.97% and 65.1212%, respectively; lead concentrate contained 56.68 lead, lead recovery was 92.09; zinc concentrate contained 53.56 zinc, recovery 76.58; gold recovery 93.72; silver recovery 91.71 1. The test index is ideal.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD923

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相關(guān)期刊論文 前1條

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本文編號(hào)：1958791