【正文】 t alkalinity environment experiments of thiourea leaching of gold this paper get the most suitable pH . From the aspect of actual production, this paper both improve the leaching rate of gold and save the consumption of alkalinity adjusting reagent, thereby save the investment and reduce equipment corrosion； ⑵ Through the theoretical analysis, this paper found various reaction mechanisms of thiourea leaching reaction , In order to find a bast stabilizer this paper design a variety of response selection of stabilizers, and find the best stabilizer of sodium silicate and optimum dosage by experiments； ⑶ This paper find the relationship between the reaction rate and reaction time based on the actual production through experiments and thereby speeding up the industrial actual production efficiency, Get more gold with the smallest gold loss and a shortest production cycle . ⑷ From the literature we know that some kinds of material like sodium sulfite can stop the thiourea from inhibiting deposition, so this paper find suitable stabilizer and the optimal dosage of stabilizer and analyzed the stabilizing mechanism theoretically, at the same time through experiment to get a suitable stabilizing agent and usage of stabilizer. ⑸ At the same time this paper also had the leaching time and temperature studied, so as to find the optimum leaching time and suitable leaching temperature, in order to reduce the consumption of resources. The selection of leaching temperature in industrial has great practical significance. Keywords： Gold leaching with thiourea。 SHANDONGＵＮＩＶＥＲＳＩＴＹ ＯＦ ＴＥＣＨＮＯＬＯＧＹ 畢業(yè)論文 氰化渣中硫脲浸金 實驗研究 摘要 I 摘 要 論文采用傳統(tǒng)的對比試驗的方法對堿性環(huán)境下硫脲浸取氰化渣中的貴金屬金的各種重要的影響因素進(jìn)行了實驗探索和現(xiàn)象討論，并結(jié)合前人的科學(xué)研究結(jié)果對實驗浸取條件進(jìn)一步明確和精細(xì)化。 ⑸ 同 時本文還對浸金時間和溫度進(jìn)行了實驗探究，從而找到了最優(yōu)化浸金時間和適宜的浸取溫度，為了減少資源消耗，浸取溫度的選擇在工業(yè)上有很大的實踐意義。 Na2SiO3目錄 III 目 錄 摘 要 .............................................................................................................................I ABSTRACT .................................................................................................................. II 目 錄 ............................................................................................................................ III 第一章 引 言 .............................................................................................................. 1 課題的背景和意義 .......................................................................................... 1 傳統(tǒng)浸金方 法 ........................................................................................ 1 硫脲浸金的發(fā)展概況 ............................................................................ 3 堿性硫脲浸金的研究 ...................................................................................... 8 硫脲浸金過程基礎(chǔ)工藝研究進(jìn)展 ........................................................ 8 亞硫酸鈉類促進(jìn)堿性硫脲穩(wěn)定性的作用機(jī)理 .................................. 10 第二章 實驗部分 ...................................................................................................... 14 試劑和儀器 .................................................................................................... 14 主要試劑 .............................................................................................. 14 儀器設(shè)備 .............................................................................................. 14 堿性硫脲浸金的試驗方法步驟 .................................................................. 14 硫脲浸金 pH 為變量時 ....................................................................... 14 金標(biāo)準(zhǔn)曲線的繪制 .............................................................................. 17 硫脲浸金時間為變量時 ...................................................................... 17 硫脲浸金穩(wěn)定劑為變量時 .................................................................. 17 硫脲浸金浸出溫度為變量時 .............................................................. 18 硫脲浸金穩(wěn)定劑用量對浸出的影響 .................................................. 18 第三章 實驗結(jié)果與數(shù)據(jù)分析 .................................................................................. 19 pH 為變量時實驗結(jié)果分析 ........................................................................... 19 浸取時間為變量時實驗結(jié)果分析 ................................................................ 20 目錄 IV 穩(wěn)定劑類型為變量時實驗結(jié)果分析 ............................................................ 21 浸取溫度為變量時實驗結(jié)果分析 ................................................................ 22 穩(wěn)定劑用量為變量時實驗結(jié)果分析 ............................................................ 23 第四章 實驗結(jié)論 ...................................................................................................... 25 參考文獻(xiàn) ...................................................................................................................... 26 致謝 .............................................................................................................................. 28 第一章 引言 1 第一章 引 言 課題的背景和意義 傳統(tǒng) 浸金方法 汞混法 [1]可以說是最古老的浸金方法了，它具有兩千多年的歷史，現(xiàn)在有許多更環(huán)保的方法逐漸替代了它，但是今天仍然有少部分的金砂礦浮選和脈金礦回收依然用到它， 混汞的工藝比較簡單分為內(nèi)混汞和外混汞兩種方法，國外也有一種特殊的混汞方法，混汞的工藝包括了汞浸濕金微粒和 汞齊反應(yīng)兩個階段。由于工藝操作流程簡單， 氰化物等浸金 原料價格 相對較為 便宜， 富集能力強(qiáng)， 溶金回收率高等 諸多 優(yōu)點 [3]，氰化物 浸金的方法就 被作為一種最有效的金浸出藥劑 而 廣泛的應(yīng)用到冶金工業(yè)中， 而今 氰化堆浸技術(shù) 是 全球廣泛應(yīng)用使氰化提金在黃金工業(yè)中占有主導(dǎo)地位， 據(jù)報道 目前 全球 70%以上的黃金是用該方法生產(chǎn)得到的 [46]。比如 含砷硫化 金 礦 就 是一種較難 處理的礦石，