废旧干电池碳包的回收工艺

Study on Recycling Technology of Carbon Complexity in Waste and Used Dry Battery

废旧干电池碳包的主要成分是锰的氧化物,另含少量锌、汞、氯化镀、碳粉和乙炔黑等。通过碳包的焙烧和酸浸实验,得出结论:①焙烧的适宜温度和时间分别是700℃、1h,在此条件下,碳可燃尽,锰的氧化物已分解完全,且锌不会以蒸汽形式跑出;②盐酸对碳包的浸取效果较硫酸和磷酸好,用体积比为1:1的盐酸在常温下浸泡碳包1h得高达95．3%的浸取率。

The chief constituent of Carbon Complexity in Waste and Used Dry Battery is oxide of manganese, and including zinc. mercury, ammonium chloride, carbon, acetylene black. By the experiments of calcination and acid-treating, we get the following two results. One is that the suitable conditions for the calcination are calcination temperature, 700℃; calcination time, th. On the conditions the carbon must be burn out and the oxide of manganese has decomposed, at the same time the zinc is unable to run out of with steam form. The other one is that the dissolution effect of hydrochloric acid is better than nitric and sulfuric to the carbon complexity, and the dissolution rate can reach 95.3% as macerating th on the concentration of 1：1 at constant temperature.