Method for recovering and treating mixed waste cells, and special calcination furnace
A waste battery, recycling and processing technology, applied in the direction of solid waste removal, furnace, lighting and heating equipment, etc., can solve the problem of waste battery pollution, achieve high recovery rate, improve economic benefits, and good separation effect.
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Embodiment 1
[0031] Below in conjunction with accompanying drawing 1, a recovery example of the present invention is described in detail, wherein the composition of the mixed waste batteries handled is: 20% zinc-manganese dry battery, 15% alkaline zinc-manganese battery, 20% nickel-metal hydride battery, 20% NiCad, 20% Li-Ion and 5% Lithium.
[0032] 1. With the help of shears and shredders, remove the outer packaging and connecting wires on the collected waste batteries to obtain single batteries, and recycle the connecting parts in this process.
[0033] At the same time, since waste batteries generally have a certain amount of residual power, in order to avoid the danger caused by the short-circuit discharge of the positive and negative plates when the battery case is opened, it is adopted to put these single batteries into a steel prefabricated container filled with water and iron powder. In the processing container, under mechanical stirring, the positive and negative electrodes of th...
Embodiment 2
[0047] Other content and operation are the same as in Example 1, the difference is that the processed battery consists of: 20% zinc-manganese dry battery, 15% alkaline zinc-manganese battery, 20% nickel-metal hydride battery, 20% nickel-cadmium battery, 25% lithium ion battery. The stirring time in step 1 is 60 minutes when fully discharged; in step 3, the amount of carbon powder added during ball milling is 25%, and the ball milling time is 30 minutes. The trace mercury in the battery, the battery diaphragm and the outer packaging plastic film are recovered under the temperature conditions, the cadmium is recovered under the calcination temperature condition of 750 ℃, and the zinc is recovered under the calcination temperature condition of 1100 ℃. The calcination time under each temperature condition is 4h; in step five, use potassium hydroxide with a concentration of 10%, and process it at a reaction temperature of 85° C. for 30 minutes; in step six, the roasting temperature...
Embodiment 3
[0050] Other contents and operations are the same as in Example 1, except that in step 3, the temperature is directly controlled at 1100-1300° C. for no less than 1 hour, and the volatile matter is collected to obtain a mixture of zinc, cadmium and mercury. Equally can reach the recovery processing effect identical as example 1.
[0051] Below in conjunction with accompanying drawing 2, the airtight roasting furnace used in step 3 of the present invention is described in detail. In Fig. 2, 1 is a blower, 2 is a roasting furnace body, 3 is a feed inlet, 4 is a discharge outlet, 5 is a throat gas pipeline, 6 is a cooler, and 7 is a flue gas filter. Their connection relationship is: the blower 1, the roasting furnace body 2, the cooler 6, and the flue gas filter 7 are connected in sequence. The upper end of the roasting furnace body 2 is equipped with a feed port 3, and the lower end is equipped with a discharge port 4. The roasting furnace body 2. The cooler 6 and the flue gas ...
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