廢電池二次料鋅錳粉之鋅與錳純度提升研究

Development of Purification Technology of Zinc and Manganese Recovered from Waste Zinc-Manganese Battery

蔡謦丞(QING-CHENG CAI)

指導教授 ： 王文裕

朝陽科技大學/理工學院/環境工程與管理系/碩士(2017年)

摘要

以往國內產出之廢電池二次料鋅錳粉主要外銷供調配土壤改質劑，但二次料鋅錳粉中鋅含量低且錳含量高；同時，國內電弧爐煉鋼廠因二次料鋅錳粉中錳含量不足，若欲資源化，品質也不是很理想。本研究將探討二次料鋅錳粉鋅和錳的純度提升技術。
本研究二次料鋅錳粉之檢測結果顯示，可燃份4.80%，錳44.80%(換算二氧化錳57.85%)、鋅27.97%(換算氧化鋅34.81%)，其他氧化物2.54%(主要為鉀、鐵氧化物)。實驗預處理先將鋅錳粉焙燒750℃將有機物燒盡，並讓二氧化錳轉化為氧化錳，再以硫酸將鋅錳粉用酸溶浸漬，並添加過氧化氫輔助酸溶。
沉澱分離鋅與錳的實驗部分，主要利用不同鹼液(氫氧化鈉、氨水)調整pH值來分離鋅與錳，並探討pH調整過程之溫度變化及鹼液添加速度對鋅與錳沉澱之影響，最後將沉澱物高溫鍛燒，探討其鋅與錳的回收率與純度。
結果顯示，在100 mL的鋅錳粉浸漬液(鋅8.39g/L，錳13.44g/L)中，選用氨水當沉澱劑沉澱鋅，反應溫度為常溫時，氨水以1 mL/min之較快方式添加；沉澱錳時，氨水以0.1 mL/min緩慢添加，並加熱溫度至70℃。最終產品之氧化鋅純度為72.72%，鋅的回收率為81.70%；二氧化錳純度為96.40%，錳的回收率為83.08%。

關鍵字

鋅 ； 錳 ； 廢鋅錳電池 ； 回收金屬 ； 選擇性沉澱

並列摘要

In the past, the domestic production of secondary material zinc-manganese powder from waste batteries is mainly exported for the allocation of soil modifiers, but the zinc content in secondary material zinc-manganese powder is low while the manganese content is high; besides, owing to the insufficient manganese content in the secondary material zinc-manganese powder, the quality of resource recovery is unsatisfactory for domestic electric arc furnace steel plants. This study explores the enhancement in zinc and manganese purification technology for secondary material zinc-manganese powder.
Analysis of the secondary zinc-manganese powder showed that the combustible content is 4.80%, the manganese concentration is 44.80% (Conversion to manganese dioxide 57.85%), 27.97% for zinc (Conversion to zinc oxide 34.81%) and 2.54% for other oxides (Mainly potassium and iron oxides). Experimental pretreatment is initiated by burning zinc-manganese powder at 750℃ to remove all organic matter, as well as to convert manganese dioxide into manganese oxide. The zinc-manganese powder is then impregnated with sulfuric acid as an acid solution while hydrogen peroxide as an auxiliary acid solution is added if necessary.
Precipitation separation of zinc and manganese experimental part of the main use of different lyes (sodium hydroxide, ammonia) to adjust different pH values so as to separate zinc and manganese. Changes in temperature during pH value adjustment were investigated as well as the effects of lyes adding rates on zinc-manganese precipitation. Finally the finished precipitates is calcinated under high temperature and the recovery and purity of zinc and manganese were discussed.

The results showed that in 100mL of zinc and manganese powder impregnation solution (zinc 8.39g/L, manganese 13.44g/L), using ammonia as precipitant for zinc precipitation, a faster ammonia adding rate of 1mL/min can be achieved under room temperature; manganese precipitation is achieved at a slower ammonia adding rate of 0.1 mL/min and under 70℃heating temperature.The purity of zinc oxide in the final product was 72.72% while the recovery of zinc was 81.70%; the purity of manganese dioxide was 96.40% while the recovery rate of manganese was 83.08%.
Keywords: Zinc, Manganese, Waste Zinc-Manganese Battery, Metals Recovery, Selective Precipitation.

並列關鍵字

Zinc ； Manganese ； Waste Zinc-Manganese Battery ； Metals Recovery ； Selective Precipitation

參考文獻

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