【摘要】：隨著黃金礦物資源不斷被開發(fā)利用,天然黃金礦物資源不斷減少,而含金二次資源的加工利用,不僅可以滿足人類社會的發(fā)展對黃金資源的需求,同時可以減少環(huán)境污染。某高硫含金精礦原料中金、硫品位分別為11.80 g/t和30.53%,由金的物相分析結(jié)果可知,硫化物包裹金60.82%,對原礦直接進(jìn)行氰化金的浸出率較低,如直接氰化處理生產(chǎn)成本較高,經(jīng)濟(jì)上不合理。本課題經(jīng)過系統(tǒng)的試驗研究,對該金精礦采用再選工藝,獲得高質(zhì)量的金精礦和硫精礦,再對金精礦進(jìn)行氰化浸出金。本課題根據(jù)該高硫金精礦的工藝礦物學(xué)研究結(jié)果,分別進(jìn)行全浮選工藝流程和重-浮聯(lián)合工藝流程進(jìn)行探索試驗,最終確定采用全浮選工藝流程,即采用磨礦細(xì)度-0.074 mm占78-80%的全浮選選礦工藝富集金、硫的選礦工藝,獲得金精礦產(chǎn)率為7.21%,金品位為129.69g/t,金回收率為88.63%;硫精礦產(chǎn)率為62.34%,其金、硫品位分別為1.80 g/t和47.99%,金、硫選礦回收率分別為10.62%和91.90%。對浮選金精礦進(jìn)行氰化浸出試驗,試驗獲得的最佳條件為:再磨細(xì)度-0.044 mm占95%,礦漿濃度33%,石灰用量8000 g/t,堿預(yù)浸30分鐘,氰化物用量12000 g/t,浸出時間24 h,金浸出率可以達(dá)到96.39%。金、硫的選冶總回收率分別為85.43%和91.90%,選冶效果比較理想。研究結(jié)果表明:采用金精礦再磨-浮選富集金硫-浮選金精礦氰化提金選冶工藝,能有效打開硫化物及部分脈石對金的包裹,減少氰化浸出和焙燒成本。本課題通過大量的試驗,最終獲得該高硫金精礦綜合回收的最有效、最經(jīng)濟(jì)的回收方案,實現(xiàn)有價元素的綜合回收,具有重要的經(jīng)濟(jì)意義。
[Abstract]:With the development and utilization of gold mineral resources, the natural gold mineral resources are decreasing, and the processing and utilization of the secondary resources containing gold can not only meet the needs of the development of human society for gold resources, but also reduce the environmental pollution. The grade of gold in a high sulfur gold concentrate is 11.80 g / t and 30.53, respectively. From the results of the phase analysis of gold, it can be seen that the leaching rate of gold cyanide directly from the original ore is lower, such as the higher production cost of direct cyanide treatment. Economically unreasonable. Through systematic test and study, the gold concentrate is reseparated to obtain high quality gold concentrate and sulfur concentrate, and then cyanide leaching of gold concentrate is carried out. According to the mineralogical research results of the high sulfur gold concentrate, the whole flotation process and the combined heavy floatation process were studied and tested respectively, and the whole flotation process was finally determined. That is to say, the whole flotation dressing process with grinding fineness -0.074 mm accounting for 78-80% was used to concentrate gold and sulfur. The gold concentrate ore rate was 7.21, the gold grade was 129.69 g / t, the gold recovery was 88.63%, the sulfur concentrate yield was 62.34%, the gold and sulfur grade were 1.80 g / t and 47.99%, respectively. The recoveries of sulfur are 10.62% and 91.90%, respectively. The cyanide leaching test of flotation gold concentrate was carried out. The optimum conditions were as follows: regrinding fineness -0.044 mm to 95%, pulp concentration 33, lime dosage 8000 g / t, alkali pre-leaching 30 minutes, cyanide dosage 12000 g / t, leaching time 24 h, gold leaching rate up to 96.39. The total recovery of gold and sulfur were 85.43% and 91.90% respectively. The results show that the cyanide extraction process of gold concentrate by regrinding and flotation of gold concentrate can effectively open the encapsulation of gold with sulphide and some gangue, and reduce the cost of cyanide leaching and roasting. Through a large number of experiments, this paper finally obtains the most effective and economical recovery scheme of the high sulfur gold concentrate, and realizes the comprehensive recovery of valuable elements, which has important economic significance.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD953

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