成都廢舊金屬在回收時需要注意哪些,其(qi)都有哪些技巧呢?
廢銀(yin)(yin)—鋅(xin)電(dian)池的回收應用(yong),對于這種,其廢銀(yin)(yin)鋅(xin)電(dian)池含銀(yin)(yin)52.55%、含鋅(xin)42.7%。鋅(xin)為負極(ji),氧化銀(yin)(yin)為正極(ji)涂在(zai)銅網骨架上。采(cai)用(yong)稀硫酸(suan)分手浸鋅(xin)和銅,銀(yin)(yin)粉間(jian)接熔錠(ding)。稀硫酸(suan)浸銅時(shi)參加(jia)氧化劑,含鋅(xin)液(ye)經濃縮(suo)結晶消(xiao)(xiao)費(fei)硫酸(suan)鋅(xin),含銅液(ye)濃縮(suo)結晶消(xiao)(xiao)費(fei)硫酸(suan)銅。鋅(xin)回收率>98%,銀(yin)(yin)回收率98%,銀(yin)(yin)錠(ding)純度>99%。
其次(ci)還(huan)有一種,就是電解(jie)(jie)退銀(yin)(yin)新工(gong)藝,這種則是通過采用(yong)(yong)電解(jie)(jie)退銀(yin)(yin)設備,然后主(zhu)要是以(yi)石墨板(ban)為陰(yin)極,不銹鋼滾筒(tong)(tong)(tong)為陽極,滾筒(tong)(tong)(tong)上(shang)有許(xu)多細孔。檸檬酸(suan)鈉和亞硫酸(suan)鈉為電解(jie)(jie)液(ye),鍍(du)(du)銀(yin)(yin)件(jian)從滾筒(tong)(tong)(tong)首端(duan)(duan)進入,從滾筒(tong)(tong)(tong)尾端(duan)(duan)送(song)出(chu)。鍍(du)(du)件(jian)表層上(shang)的(de)銀(yin)(yin)進入電解(jie)(jie)液(ye),鍍(du)(du)件(jian)基(ji)體(ti)完全無損(sun)可返回從新電鍍(du)(du)應(ying)用(yong)(yong)。銀(yin)(yin)回收率97—98%,銀(yin)(yin)粉純度99.9%。