How To Solve The Harm Of Waste Batteries
Author: Source: Datetime: 2016-09-13 16:30:05
1, Button batteries contain mercury. When it is abandoned in nature, after the outer layer of metal corrosion, mercury batteries will slowly people overflowed into the soil or into the groundwater after the rain, and then enter the body, damage to crops or human kidneys by drinking water.
2, Rechargeable batteries generally contain toxic metals cadmium. After bleeding in nature, pollution of land and water, and finally enter the body.
3, Ordinary batteries also contain mercury, but also contain lead and acid, it is also very harmful to the environment, therefore, must not be casually discarded in nature.
The dangers of used batteries
A button battery can contaminate 600,000 liters of water equal to the amount of water a person's life. A battery rot in the ground, can make one square meter of land lost value, so the used batteries to a steadily as a "pollution bomb" is not too much.
We daily use of ordinary LifePO4 battery pack, mainly acidic manganese batteries and alkaline manganese batteries are two types, they contain mercury, manganese, cadmium, lead, zinc and other metals, used batteries after being abandoned, the battery case will slowly corrode, heavy metals which will gradually seep water and soil pollution. Heavy metal pollution is the biggest characteristic is that it does not degrade in nature, only through purification, to eliminate pollution.
Manual sorting recycling technology
After the battery is generally classified, simple mechanical cut, artificial leather isolated zinc, plastic cover, carbon rods, etc., the remnants of a mixture of Mn02, water manganese stone anyone to return kiln calcination to prepare dehydrated Mn02, this method simple, but take up more labor, not economic.
Fire recycling technology
The batteries are generally classified, after crushing, into the rotary kiln at high temperatures of 1100 to 1300 degrees Celsius, zinc chloride and zinc is oxidized to zinc oxide with the flue gas exhaust, dust cyclone recovery of zinc oxide, the remaining two manganese oxide and manganese stone into the water residue was further recovered manganese and other substances, this method is simple, the general smelter Needless to add equipment to the recovery of zinc.
Wet recycling technology
According zinc, manganese dioxide, acid soluble principle, the classification of waste lifePo4 batteries which is usually used for solar power portable generator, after crushing, leaching into the slot, dilute sulfuric acid (100 ~ 120g / L) for leaching to obtain a zinc sulfate solution, electrolytic method available metal zinc, copper residue was washed hat isolated after carbon rods, the residue Mn02, Mn02 obtained after water calcined manganese stone. The method used has a roasting leaching and direct leaching method.
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