EPA-104-X07

104

1,100 千元

2015/01/01

2015/11/30

黃耀輝

回收基管會

歐真妤

國立成功大學

廢棄物管理

鉛蓄電池、浸漬、集塵灰、鉛冰料、電解、鉛膏

lead-acid batteries, leaching, fly ash, slag, electrolysis, lead paste

許家棋

06-2757575#236

gtyh1452@hotmail.com

鉛蓄電池目前被廣泛的運用於交通運輸方面，依據環保署的統計，近幾年廢鉛蓄電池年回收量皆已超過 5 萬公噸。但在回收處理的過程中卻也產生了不少環境問題。主要是因為廢鉛蓄電池處理廠回收鉛都採火法冶金技術，此法會產出兩大類的高含鉛率副產物，一種為含鉛率較高的爐渣，即俗稱的鉛冰料；一種為集塵灰。但這兩類副產品目前基本上都被當作有害事業廢棄物來進行處理，不僅增加了處理的成本，也浪費了當中所含有的鉛資源。 為改善上述問題，本計畫欲發展以浸漬加電解的濕法冶金技術來回收上述副產物中的鉛，一方面可減少廢棄物數量，另一方面還可將鉛回收進行再利用，達到廢棄物減量及資源化再利用之目的。 經過本研究的實驗後發現，目前3家廢鉛蓄電池處理廠的集塵灰重量去除率皆能達到85 %以上，效果相當好，表示以鹼浸漬電解方式回收鉛之方法的確能有效將有害事業廢棄物集塵灰給有效回收處理。不過鉛冰料部分仍未找到適合的電解條件來進行處理。 若以本研究方法來進行每月處理10噸集塵灰的成本估算，初估結果不僅每個月可節省10.8萬元之集塵灰處理費，還可獲得35.36萬元的回收鉛產值，扣掉操作成本後可使投資設備回收期僅約一年左右，故本技術具有相當的研究發展潛力。

鉛蓄電池、浸漬、集塵灰、鉛冰料、電解、鉛膏

EPA-104-X07.pdf

5MB

2016/2/1 上午 12:00:00

Lead acid batteries are commonly used in the automobiles. The Environmental Protection Administration (EPA) has estimated that over 50,000 tonnes of lead acid battery waste were produced in recent years. But recycling process of lead-acid batteries causes a lot of interest in the issues of the environmental protection. In Taiwan, all of waste lead-acid battery treatment plants use pyrometallurgical technique. But it will produce two type of byproducts which have high lead content by the treatment method. One type of the byproducts is slag, and the other type is fly ash. Unfortunately, these byproducts are treated as hazardous industrial waste now. Not only increases the cost of treatment, but also waste the lead which contained in those byproducts. In order to improve the above problems, hydrometallurgical technique which includes two steps of leaching in alkaline solutions and electrolysis was tried to use in this study. For one thing, it can reduce the quantities of these hazardous industrial waste. Besides, it also can recycle the lead from these byproducts. Up to now the weight removal ratios of fly ash which was taken from three of the waste lead-acid battery treatment plants are more than 85 % in this study. The good result represents fly ash can be treated effectively by leaching in alkaline solutions and electrolysis. But slags have yet to find the suitable operation condition for treatment. If it can treat 10 tonnes fly ash per month by the method of this study, the cost can not only save 108,000 NT dollars for treatment costs, but also receive 353,600 NT dollars by selling recycled lead. After deducting operation cost, the payback period of investment just about 1 year. Therefore, this hydrometallurgical technique has considerable potential for development.

lead-acid batteries, leaching, fly ash, slag, electrolysis, lead paste