【正文】 nditions more clear and fine bined with previous research results. And obtained the following results： ⑴ Through the different 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。 ⑷ 根據(jù)文獻綜述已知亞硫酸鈉類的物質(zhì)具有穩(wěn)定硫脲抑制分解的作用，所以要從這類物質(zhì)中找到合適的穩(wěn)定劑和確定穩(wěn)定劑的最佳用量本文從理論上分析了穩(wěn)定劑的作用機理，同時通過實驗找到了合適的穩(wěn)定劑和穩(wěn)定劑的和利用量，本實驗已經(jīng)給出了一直最佳穩(wěn)定劑及用量。 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一步明確和精細化。從而得到如下成果： ⑴ 通過不同堿度環(huán)境下的實驗得出了堿性環(huán)境下硫脲浸金的最適宜 pH 值，從實際生產(chǎn)的角度既提高了金的浸出率又節(jié)省了堿度調(diào)節(jié)藥劑的使用量，從而節(jié)約成本減少設(shè)備腐蝕；⑵ 通過理論分析，找 到了硫脲浸金的反應(yīng)中的各種反應(yīng)機理，從而對反應(yīng)進行優(yōu)化設(shè)計選取了多種穩(wěn)定劑，并通過試驗驗證找到了最佳穩(wěn)定劑硅酸鈉和最佳反應(yīng)用量； ⑶ 立足實際生產(chǎn)通過實驗找到了反應(yīng)速率與反應(yīng)時間的關(guān)系從而加快了工業(yè)上的實際生產(chǎn)效率，即在最小的金損失和一定的生產(chǎn)周期情況下提煉到更多的金。 ⑸ 同 時本文還對浸金時間和溫度進行了實驗探究，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。 Alkaline。 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)工藝研究進展 ........................................................ 8 亞硫酸鈉類促進堿性硫脲穩(wěn)定性的作用機理 .................................. 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 ...................................................................................................................... 26 致謝 .................................