Waste lithium-ion battery - Wet recovery technology

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Fa&39;atauina Fale Malosi feavea&39;i

Abandoned lithium-ion batteries contain a large number of non-renewable and economical metal resources such as cobalt, lithium, nickel, copper, aluminum, etc., if it can effectively recover the abandoned or unqualified lithium-ion battery, not only reduce waste Battery's pressure on the environment, can also prevent waste of metal resources such as cobalt and nickel. Changzhou Jinbofan Energy New Material Co.

, ଲିମିଟେଡ୍ cooperated with colleges and universities to establish a research group with Jiangsu Technical Teachers College, Jiangsu Province Deep Production Technology and Its Use Key Laboratory for technical support. Valentine metal, after three years of research, processing complex, process long, organic solvent, cause harmful factors such as environment, shorten the process, reduce power consumption, improve metal recovery, purity and recovery To form an annual 8,000 ton waste lithium ion battery metal full turn off cleaning recovery process and its use results.

The project belongs to the use of solid waste resource utilization. The technical principle is to use wet metallurgical technology to separate and recover, including leaching, solution purification, solvent extraction, etc., and electro-metallurgical technology is final Get single-tied metal products.

The technical route is: first solve the wafering, disassembly, pulverization, sorting, sorting; after disassembly of plastic and iron housing recovery; sorting the electrode material for alkali leaching, acid immersing, intronium After the extraction. Extraction is a key step, separating copper with cobalt, nickel; copper enters the cervical tank; the cobalt, the nickel solution after extracting, then extracted, then crystalline concentration, straight to cobalt salt And nickel salts; or cobalt, nickel, nickel, and nickel, respectively, to obtain an electrical drill and an electron nickel product. The drill, copper and nickel recovery of the electrodeposition process reaches 99%, and the grade is 99.

98%, 99.95% and 99.2% ~ 99.

9%, cobalt sulfate, sulfate products, etc. Under the premise of optimization research results, the development and construction of industrialization, the establishment of a waste lithium-free ion full-closed cleaning and processing line with 8,000 tons of recovery, recovered 1500 tons of cobalt, 1200 tons of copper and Nickel 420 tons, total output value exceeds 400 million yuan. Limiting the wet recovery heavy metal technology, and it is not seen in China.

This result has certain command uses for the national waste lithium-ion battery metal resources, successfully filled the domestic gap; clean and environmentally friendly, low cost, high profit, with a large competitive advantage in similar companies. Adopt wet recovery process, integration, simplify process, low energy consumption, high product recovery rate. The leaching process uses 3 reflux leaching, increasing the leaching rate to 98.

7%; high-efficiency copper, cobalt extract separated copper, cobalt extraction, and integrates high concentrations of copper sulfate, sulfate liquid, to satisfy electrolysis deposition Process requirements, improve the efficiency of recovering heavy metals. Electrodeposition process voltage and current density are lowered, save power consumption. High recovery rate of the whole process is high value processing technology.

In the electrical process, the sprouting small amount of sulfate exhaust gas collects the gas-free hood negative pressure exhaust gas, reducing exhaust gas emissions; the amount of the poverty fluid, wherein the copper ion content is low and the sulfuric acid concentration is improved. Liquid or leaching fluid circulation, high integrated utilization. Most of the machining process passes through the pump delivery, the tanks, circulating tanks, the washing tank, the extract box and the split groove are closed.

The process control is strict, the mechanization is high, reducing the raw film loss caused by the jogging, also Reduce non-tissue emissions from pollutants. The amount of sulfate, hydrochloride is sprayed, and the removal rate is high, and the exhaust gas emissions are low. Wastewater is solved after the standard discharge, filter residue, waste residue is used to make cement, brick and other building materials, and the disposal rate of solid waste is 100%, and the pollution is discharged.

Waste lithium-ion batteries are hazardous waste, but recover heavy metals from it, ultimately obtain high value-of-value products such as electrolytic cobalt, electrolytic copper and electrolyte nickel, can be used as processing raw materials for lithium ion batteries while forming a large-scale machining line, better Realized the cyclic utilization of resources in the region. Domestic is only in the research stage, there have not been reported reports on scale. The project uses pulverized sorting a leaching of a extract-and concentrated crystalline process recovered copper, cobalt, nickel, etc.

in the wafer ion battery, not only for the optimization of various processes, and improves acid leaching rate and product. Purity, and integration reduced the process flow, reducing the complexity of process operation, reducing recovery cost, and improving process flexibility. According to the market to adjust the type of product, it can finally obtain high value-of-value products such as cobalt, electrocracene and electron nickel, and can obtain a raw material for processing lithium-ion batteries such as cobalt sulfate and nickel sulfate, and realize the recycling of resources.

In addition, it also takes into account the waste gas, wastewater, waste residue, etc. of the processing process, and the environmental protection control is added, clean and processing, and achieve the goal of polluting the standard emissions. After organizing the expert group to organize expert groups in my country, the project is identified by the project, and the level is the international leader.