發(fā)布時(shí)間：2018-02-24 12:12

  本文關(guān)鍵詞： 高碳 高泥 氧硫混合鉛鋅礦 脫炭 優(yōu)先浮選　出處：《昆明理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)民經(jīng)濟(jì)的發(fā)展,硫化礦資源不斷被開發(fā)與消耗,氧化鉛鋅礦和氧硫混合鉛鋅礦的高效開發(fā)與利用已經(jīng)成為保障我國(guó)鉛鋅需求量的重要途徑。試驗(yàn)礦石取自桂林鉛鋅礦床,屬典型的高碳氧硫混合型鉛鋅礦石。礦石結(jié)構(gòu)和構(gòu)造復(fù)雜,礦物嵌布粒度細(xì),且原礦含碳量和含泥量均高,礦石選別難度極大。本文以該礦石為研究對(duì)象,針對(duì)礦石高碳、高泥和氧硫混合的特點(diǎn),探索其選礦工藝流程及藥劑制度,對(duì)解決相同類型鉛鋅礦石的選別具有一定的指導(dǎo)意義。原礦中主要有用元素為鉛、鋅和伴生元素銀,其中Pb品位3.62%,氧化率高達(dá)74.86%,鉛礦物主要包括鉛礬、方鉛礦和白鉛礦；Zn品位8.20%,鋅礦物主要包括閃鋅礦、菱鋅礦、異極礦和鋅鐵尖晶石,硫化鋅占73.99%；伴生元素Ag品位84.13g/t,銀主要賦存于方鉛礦中,其它元素暫無(wú)回收價(jià)值。脈石礦物主要為石英、硅酸鹽礦物及鈣鎂碳酸鹽礦物。原礦含碳量高達(dá)6.75%,含泥量高達(dá)32.25%,這些都對(duì)選別作業(yè)帶來(lái)了很大影響。在工藝礦物學(xué)研究的基礎(chǔ)上,論文對(duì)礦石的選別流程進(jìn)行了探索試驗(yàn),確定了“預(yù)先脫炭-硫化鉛-硫化鋅-氧化鉛”的優(yōu)先浮選原則流程。在此基礎(chǔ)上,進(jìn)行了條件試驗(yàn)研究,確定了最佳藥劑制度；經(jīng)開路流程后,確定了各階段精、掃選次數(shù)：兩次粗選脫炭、硫化鉛采用一粗三精兩掃流程、硫化鋅采用一粗兩精兩掃流程、氧化鉛采用一粗三精兩掃流程。閉路試驗(yàn)流程最終獲得三個(gè)產(chǎn)品,其中硫化鉛精礦中Pb品位為23.46%,回收率為27.40%,含Ag946.51g/t,回收率為45.13%；硫化鋅精礦中Zn品位為46.97%,回收率為69.44%,含Agl73.82g/t,回收率為24.86%；氧化鉛精礦中Pb品位為24.11%,回收率為45.34%,含Ag148.19g/t,回收率為11.37%,硫化鉛和氧化鉛精礦總回收率為72.74%。獲得了較好的選別指標(biāo)。
[Abstract]:With the development of national economy, sulphide ore resources have been continuously developed and consumed. The efficient development and utilization of lead-zinc oxide ore and mixed lead-zinc ore has become an important way to ensure the demand of lead and zinc in China. The experimental ore is taken from Guilin lead-zinc deposit. The ore is a typical lead-zinc ore with high carbon, oxygen and sulfur. The ore structure and structure are complicated, the mineral size is fine, and the carbon content and mud content of the ore are high, so it is very difficult to separate the ore. This paper takes the ore as the research object, and aims at the high carbon content of the ore. The characteristics of mixture of high mud and oxygen and sulfur, and exploration of the processing process and reagent system of the ore are of certain guiding significance for the separation of the same type of lead-zinc ore. The main useful elements in the ore are lead, zinc and associated element silver, the main useful elements in the raw ore are lead, zinc and associated elements silver. The grade of Pb is 3.62%, the oxidation rate is up to 74.86, the lead minerals mainly include lead alum, galena and white lead ore, zinc mineral mainly includes sphalerite, smithsonite, heteropolar ore and zinc-ferric spinel, zinc mineral mainly includes sphalerite, smithsonite, heteropolarite and zinc-ferric spinel. Zinc sulphide accounts for 73.99%, Ag grade of associated element is 84.13 g / t, silver mainly occurs in galena, other elements have no recovery value for the time being, gangue minerals are mainly quartz, Silicate minerals and calcium magnesium carbonate minerals. The primary ore contains as much as 6.75 carbon and 32.25 mud, all of which have a great influence on the separation operation. On the basis of the study of process mineralogy, the paper makes an exploratory experiment on the separation process of ore. The preferential flotation principle flow of "advance decarbonization, lead sulphide, zinc sulphide and lead oxide" was determined. Cleaning times: twice rough separation of carbon, lead sulphide using one coarse three fine two sweep process, zinc sulfide using one coarse two fine two sweep process, lead oxide using one coarse three fine two sweep process. Closed circuit test process to obtain three products, The Pb grade of lead sulfide concentrate is 23.46, the recovery rate is 27.400.The content of Ag946.51g / t is 45.131g / t; the zinc sulfide concentrate has 46.97 zinc grade and 69.44g / t Agl73.82g / r = 24.86; the lead oxide concentrate has 24.11Pb grade and 45.34g / t Ag148.19g / t, and the recovery is 24.86g / t, with a recovery of 45.34g / t and a recovery of 45.34g / t with a recovery of 45.34g / t, with a recovery of 69.44g / t and an Agl73.82g / r / t, respectively. The total recovery rate of lead sulfide and lead oxide concentrate is 72.74.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD952

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本文編號(hào)：1530186