本文選題：鉛鋅礦 + 高氧化率�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：我國氧化鉛鋅礦儲(chǔ)量豐富,合理地開發(fā)利用這些礦產(chǎn)資源對(duì)我國國民經(jīng)濟(jì)的發(fā)展具有重要意義。本論文以保山氧化鉛鋅礦為研究對(duì)象,該礦石結(jié)構(gòu)復(fù)雜,嵌布粒度較細(xì),含泥量較大,屬于難選氧化鉛鋅礦,針對(duì)礦石這些特點(diǎn),進(jìn)行了一系列試驗(yàn),取得了良好的試驗(yàn)效果,為相同類型氧化鉛鋅礦的選別提供一定的指導(dǎo)意義。在實(shí)際礦物選礦試驗(yàn)的基礎(chǔ)上,進(jìn)行了單礦物試驗(yàn),對(duì)相關(guān)作用機(jī)理進(jìn)行了初步探索。工藝礦物學(xué)研究表明,原礦中有用元素是鉛和鋅,其中鉛品位3.04%,氧化率66.45%;鋅品位7.89%,氧化率高達(dá)85.68%,礦石屬于高氧化率氧硫混合難選鉛鋅礦。礦石中主要有碳酸鹽、硫酸鹽、氧化物、硫化物和硅酸鹽共五類15種礦物,其中鉛的有用礦物主要有方鉛礦、白鉛礦、鉛礬和鉛鐵礬等,鋅的有用礦物主要有菱鋅礦、異極礦和閃鋅礦等,脈石礦物主要是白云石等。在工藝礦物學(xué)研究的基礎(chǔ)上,進(jìn)行原則流程探索試驗(yàn),確定了“硫化鉛—硫化鋅—氧化鉛—氧化鋅”依次優(yōu)先浮選流程;進(jìn)行浮選條件試驗(yàn)研究,確定了最佳的浮選藥劑制度;進(jìn)行開路試驗(yàn),確定了各階段精選次數(shù)和掃選次數(shù);最終確定閉路流程為:硫化鉛浮選采用一次粗選、三次精選、兩次掃選的流程;硫化鋅浮選采用一次粗選、兩次精選、兩次掃選的流程;氧化鉛浮選采用一次粗選、兩次精選、兩次掃選的流程;氧化鋅浮選采用一次粗選、兩次精選、兩次掃選的流程。閉路試驗(yàn)最終得到四個(gè)產(chǎn)品:硫化鉛精礦、硫化鋅精礦、氧化鉛精礦和氧化鋅精礦,產(chǎn)品指標(biāo)令人滿意。其中硫化鉛精礦鉛品位66.16%,回收率31.58%;硫化鋅精礦鋅品位58.27%,回收率13.26%;氧化鉛精礦鉛品位56.45%,回收率53.38%;氧化鋅精礦鋅品位42.95%,回收率68.63%。由單礦物試驗(yàn)可知,十二胺、十八胺和KZF三種捕收劑對(duì)菱鋅礦均有較強(qiáng)的捕收能力,其中KZF的捕收效果最好,十八胺次之,十二胺最后。由表面Zeta電位研究可知,三種捕收劑與硫化鈉處理后的菱鋅礦發(fā)生的作用主要為靜電吸附作用,并且KZF的靜電吸附作用最強(qiáng),十八胺其次,十二胺最后;吸附量的研究進(jìn)一步說明KZF的捕收效果最好。
[Abstract]:There are abundant reserves of lead and zinc oxide ore in our country. It is of great significance to develop and utilize these mineral resources reasonably for the development of our national economy. In this paper, Baoshan lead-zinc oxide ore is taken as the research object. The ore has complex structure, fine grain size and large amount of mud, and belongs to refractory lead-zinc oxide ore. A series of tests have been carried out in view of these characteristics of the ore, and good experimental results have been obtained. It provides some guidance for the separation of the same type of lead-zinc oxide ore. On the basis of the actual mineral concentration test, the single mineral experiment was carried out, and the related mechanism was preliminarily explored. The process mineralogical study shows that the useful elements in the ore are lead and zinc, in which lead grade 3.04, oxidation rate 66.45, zinc grade 7.89, oxidation rate up to 85.68, ore belongs to high oxidation rate oxygen sulfur mixed refractory lead-zinc ore. There are mainly 15 kinds of minerals of carbonate, sulfate, oxide, sulphide and silicate, among which the useful minerals of lead are mainly galena, white lead, lead alum and lead ferrite, and the useful minerals of zinc are mainly smithsonite. Heteropolar ore and sphalerite, gangue minerals are mainly dolomite and so on. Based on the study of process mineralogy, the principle process exploration test was carried out, and the first flotation process of "lead sulphide-zinc sulfide-lead oxide-zinc oxide" was determined, the flotation conditions were studied, and the optimal flotation reagents system was determined. The open circuit test was carried out to determine the number of times of cleaning and cleaning in each stage; the final closed-circuit process was determined as follows: the flotation process of lead sulfide was one coarse, three cleaning and two sweeping; the zinc sulfide flotation used one coarse separation, two cleaning, The process of twice cleaning is used; lead oxide floatation adopts one roughing, two cleaning, two scavenging processes, and zinc oxide flotation adopts one roughing, two cleaning and two scavenging processes. Finally, four products were obtained by closed circuit test: lead sulphide concentrate, zinc sulfide concentrate, lead oxide concentrate and zinc oxide concentrate. The lead grade of lead sulfide concentrate is 66.16, the recovery rate is 31.58; the zinc grade of zinc sulfide concentrate is 58.27, the recovery is 13.26; the lead grade of lead oxide concentrate is 56.45 and the recovery is 53.38; the zinc grade of zinc oxide concentrate is 42.95 and the recovery is 68.63. From the single mineral tests, it can be seen that dodecylamine, octadecylamine and KZF have strong collecting ability to smithsonite, among which KZF is the best, octadecylamine is the second, and dodecylamine is the last. The results of surface Zeta potential indicate that the interaction between the three collector and sodium sulfide treated smithsonite is mainly electrostatic adsorption, and the electrostatic adsorption of KZF is the strongest, the octadecylamine is the second, and the dodecylamine is the last. The study of adsorption capacity further shows that KZF has the best capture effect.
【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】：2017
【分類號(hào)】：TD952

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