本文選題：銅鉛混合精礦 + 銅鉛分離　； 參考：《昆明理工大學》2017年碩士論文

【摘要】：硫化銅鉛礦物因礦物之間可浮性相近,導致浮選分離困難。本試驗實際礦樣取自臨滄多金屬硫化礦經(jīng)混合優(yōu)先浮選得到的銅鉛混合精礦,本文通過對不同藥劑作用下黃銅礦、方鉛礦單礦物表面藥劑吸附量的測定及礦物回收率的變化的考察,對藥劑作用機理進行了初步的探究,在此基礎上對銅鉛混合精礦礦樣進行選礦試驗研究,制定了合適的藥劑制度,實現(xiàn)了銅鉛混合精礦的有效分離。黃銅礦、方鉛礦單礦物試驗中,乙基硫氨酯對黃銅礦的選擇性捕收作用在幾種捕收劑中表現(xiàn)出明顯的優(yōu)勢。在pH8時,使用乙基硫氨酯作為銅鉛分離浮選中的捕收劑,黃銅礦回收率無明顯變化,方鉛礦卻有明顯降低,且隨藥劑濃度變化,黃銅礦表面乙基硫氨酯的吸附量遠比方鉛礦表面吸附量多,證明了乙基硫氨酯對黃銅礦具有明顯的選擇性捕收作用。硫代硫酸鈉+可溶性淀粉以2:1的比例混合使用作為銅鉛分離時方鉛礦的抑制劑,抑制效果明顯比單獨使用時更有優(yōu)勢。在藥劑試驗濃度范圍內(nèi),組合藥劑的使用會顯著降低方鉛礦表面乙基硫氨酯的吸附量,方鉛礦回收率表現(xiàn)出明顯變化,但黃銅礦浮選回收率沒有明顯影響,相比方鉛礦傳統(tǒng)抑制劑重鉻酸鉀具有對環(huán)境危害小的優(yōu)點;組合抑制劑最佳配比為硫代硫酸鈉:可溶性淀粉為2:1。在單礦物試驗的基礎上對臨滄銅鉛混合精礦進行浮選分離試驗,混合精礦再磨后經(jīng)過硫化鈉脫藥,采用硫代硫酸鈉+可溶性淀粉作為方鉛礦抑制劑,乙基硫氨酯作為捕收劑,經(jīng)過一次粗選四次精選三次掃選的閉路試驗,最終獲得銅品位為19.04%,含鉛2.12%,銅回收率為89.90%的銅精礦和鉛品位為45.80%,含銅1.07%,鉛回收率為97.75%的鉛精礦,實現(xiàn)了銅鉛分離。
[Abstract]:The flotation separation of copper-lead sulfide minerals is difficult due to the similar floatability between minerals. The actual ore sample was obtained from the copper-lead mixed concentrate of Lincang polymetallic sulphide ore after mixed preferential flotation. In this paper, the chalcopyrite was treated with different chemicals. On the basis of the determination of the adsorption capacity of galena single mineral surface and the change of mineral recovery rate, the mechanism of medicament action was preliminarily explored. On the basis of this, the mineral concentration of copper-lead mixed concentrate was tested and studied. The effective separation of copper and lead mixed concentrate was realized by establishing a suitable medicament system. In the single mineral test of chalcopyrite and galena, the selective capture of chalcopyrite by ethyl thiamine has obvious advantages in several kinds of collector. In pH8, when ethyl thiamine was used as collector in flotation of copper and lead, the recovery rate of chalcopyrite did not change obviously, but the galena decreased obviously, and the concentration of chalcopyrite changed with the concentration of copper and lead. The amount of ethyl thiamine adsorbed on chalcopyrite surface is much more than that on galena surface, which proves that ethyl thiamine ester has obvious selective capture effect on chalcopyrite. When sodium thiosulfate soluble starch was mixed at 2:1 as an inhibitor of galena in copper-lead separation, the inhibitory effect was obviously superior to that of using it alone. In the range of reagent test concentration, the adsorption amount of ethyl thiamine on galena surface can be significantly reduced by the use of combined reagent, and the recovery rate of galena shows obvious change, but the flotation recovery rate of chalcopyrite has no obvious effect. Compared with the traditional galena inhibitor, potassium dichromate has the advantage of less harm to the environment, and the optimum ratio of the combined inhibitor is sodium thiosulfate: soluble starch is 2: 1. The flotation separation test of Lincang copper-lead mixed concentrate was carried out on the basis of single mineral test. After regrinding, the mixed concentrate was demineralized by sodium sulphide, sodium thiosulfate soluble starch was used as galena inhibitor, and ethyl thiamine ester was used as collector. After a closed circuit test of four times cleaning and three times cleaning, the copper concentrate with a copper grade of 19.04, lead content 2.12%, copper concentrate with a recovery rate of 89.90% and lead grade 45.80, copper containing 1.07m and lead concentrate with 97.75% lead recovery were obtained. The separation of copper and lead was realized.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD952;TD923

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