- 學位論文
廢錫鋅粉資源化技術與流程設計
The process design for the recycling of Zn/Sn valuables from waste solder drass
摘要
國內工業已經由傳統產業逐漸演化成高科技、高產值及高資本的電子工業，在數十年的努力發展下，台灣已成為世界高科技電子產業重鎮，相對在製造過程中也衍生出許多廢棄物，這些廢棄物的產出對環境造成相當程度之影響。此外，電子業製程廢棄物常含有許多有價物質，如果能將這些有價物質加以回收，不僅可以解決環境的問題，對於產業的永續發展亦是十分重要之課題。本研究以『廢錫鋅粉』作為資源化處理物，經由火法冶金及濕法冶金原理進行資源化技術探討，並以綠色製程為資源化技術與流程設計之目標，最終進行商業運轉經濟效益評估。經實驗結果得知，常溫下，1.5M硫酸溶液浸漬12小時，鋅溶出率87%；錫溶出率低於0.95%，為最佳商業化設計參數。酸浸漬所產生硫酸鋅溶液以1：1：1添加H2O2及 EtOH可沉澱合成為氧化鋅。並依據上述實驗結果探討資源化程序可行性，提出資源化處理模廠概念規劃與設計，期望能以資源循環再利用的角度，達成零排放（zero emission）之目標。
並列摘要
Within dozens of year, the industry evolution process in Taiwan is gradually evolved from conventional to the high-tech, the high-production and the high-capital electronics industry. Taiwan has become the worldwide high-tech industrial factory plant but at the same time, the manufacturing processes have produced many kinds of wastes, which have polluted the environment with the certain degree; however, the wastes that have been disposed by the electronics companies contain many valuable materials. If these valuable materials can be recycled, this not only solves the environmental pollution issue, but also being an important topic for the industry continuous development. The research paper is based on the recycling process of the Zn/Sn solder powder waste thru the technology of pyrometallurgy and hydrometallurgy principles. In addition, the main goal of recycling process is based on the green process and process design to reveal the commercial operation and the economical benefit. The experiment results show that, under normal temperature, 1.5M sulfuric acid solution for 12 hours by leaching, the zinc dissolution rate of 87 percent; tin dissolution rate of less than 0.95 percent, as the best commercial design parameters. Acid produced by impregnation with zinc sulfate solution 1:1:1 can add H2O2 and EtOH precipitation for the synthesis of zinc oxide. The experimental results in accordance with the above resources to explore the feasibility of the procedure,The ultimate expectation of this research is to achieve zero emissions thru the concept of recycling process of the Zn/Sn solder powder waste.