Hefei Hengli Solves the First Key Problem in Lithium Battery Recycling with "Live Crushing + Low-Temperature Drying"

For lithium battery recycling enterprises, the crushing stage at the front end of the production line faces multiple challenges: it must address the safety hazards of charged crushing, as well as tackle issues such as equipment corrosion caused by electrolyte residue and increased pressure on environmental protection treatment. 

Against this backdrop, Hefei Hengli Equipment Co., Ltd. (hereinafter referred to as "Hengli Equipment"), relying on over 30 years of industry-leading technological accumulation, has launched an integrated system of "live crushing + low-temperature drying". Through the combination of "negative pressure environment + low-temperature drying + low-temperature fluorine fixation", it has addressed the three major pain points recognized in the industry: flammability and explosion risk in live crushing, corrosion susceptibility of core equipment, and difficulty in treating pyrolysis tail gas, transforming the crushing process from a cost center into a profit center: 

Regarding the self-oxygen release characteristics of ternary lithium, simply relying on inert gas is not safe. Hengli Equipment, through high-sealing design, completely isolates the crushing chamber from the outside world and actively controls the oxygen content below the safety threshold. The four-shaft crusher with body seal is specially designed for negative pressure environment. Meanwhile, aiming at the common problem that battery materials easily damage vacuum valves, a dual-combination structure of self-developed material isolation valve + vacuum valve is adopted. The material isolation valve blocks hard materials, and the vacuum valve ensures sealing, thus completely solving the engineering problems of short valve lifespan and sealing failure.

The strong corrosiveness of electrolyte will significantly shorten the lifespan of pyrolysis furnaces. In traditional processes, wet materials directly enter high-temperature furnaces, which can easily lead to corrosion and damage of furnace tubes. Hengli Equipment has achieved source fluorine reduction through negative-pressure low-temperature pretreatment. By removing and collecting most of the electrolyte before the crushed materials enter the high-temperature pyrolysis furnace, it reduces the corrosion sources at the back end, significantly extends the service life of core pyrolysis equipment, and lowers the maintenance and replacement costs over the entire equipment lifecycle. 

Lithium hexafluorophosphate in lithium battery electrolyte has poor thermal stability, easily decomposes when heated, and generates a large amount of fluorine-containing waste gas, causing a sharp increase in the difficulty of environmental protection treatment. Hengli Equipment conducts low-temperature drying treatment on the electrolyte under a negative pressure environment, causing it to decompose and form lithium fluoride, which remains stably in the black powder in solid form. This can not only improve the lithium recovery rate of the final product and increase economic returns, but also prevent a large amount of fluoride from entering the waste gas system, significantly reducing the complexity of end-of-pipe environmental protection treatment and equipment investment from the source. 

With the fluctuation of raw material prices and the intensification of industry competition, the lithium battery recycling industry is undergoing a brutal reshuffle. 

Hengli Equipment is willing to take the "Live Fragmentation and Drying" system as the cornerstone, and use high-end equipment manufacturing technology to help lithium battery recycling enterprises build a safe, efficient, and compliant production competitive edge, seizing the initiative in the industry reshuffle.