Abstract: The present disclosure relates to a technical field of waste circuit board processing. A pyrolysis device for a waste circuit board is provided, including a pyrolysis furnace for performing pyrolysis treatment on the waste circuit board; a carbon black collection tank for collecting carbon black formed after the pyrolysis treatment; a processing unit for crushing the carbon black and separating magnetic metal from the carbon black; and a helical conveyor. A feeding end of the helical conveyor is located in the carbon black collection tank, and a discharging end is connected to the processing unit. The processing unit includes a crushing assembly including a housing, two sorting tubes rotatably connected to the housing, a first guide plate disposed on the housing, two adjustment sections respectively provided in the two sorting tubes and connected to the housing, and a plurality of permanent magnets connected to each adjustment section.

Abstract: Provided is a method for extracting and recovering high-purity lithium carbonate and iron phosphate from a spent lithium battery material. The method includes the following steps. In a first extraction stage, the iron phosphate feature data is input into an iron phosphate quality analysis model to obtain a first quality index at time T1+a. Whether the extraction device is in an abnormal extraction state at time T1+a is determined. If the abnormal extraction state occurs, an extraction adjustment instruction is generated, and the extraction device is adjusted. If not, a second extraction instruction is generated, and whether the extraction device is in an abnormal state at time T2+b in a second extraction stage is determined. If the extraction device is in the abnormal extraction state, a second extraction adjustment instruction is generated, and the extraction device is adjusted. If not, extraction continues until extraction of lithium carbonate is completed.

Abstract: A training method includes obtaining a pre-training content set, sample content, and a definition level annotation corresponding to the sample content, performing unsupervised pre-training on a feature extraction network of a definition recognition model based on content in the pre-training content set to obtain a pre-trained feature extraction network, performing definition recognition on the sample content using the pre-trained feature extraction network and a prediction network of the definition recognition model to obtain a predicted definition level, calculating a training loss based on the predicted definition level and the definition level annotation, and updating one or more model parameters of at least one of the pre-trained feature extraction network and the prediction network according to the training loss.

Abstract: A method for preparing two-dimensional sheet-like Li4SiO4 sorbent, including: obtaining LiCoO2 by performing discharging, aluminum foil stripping, and sieving on waste lithium battery cathode material, and drying; obtaining biomass by freeze-drying waste biomass, and grinding and sieving the freeze-dried waste biomass; mixing LiCoO2 and the biomass uniformly to obtain a mixture, and putting the mixture into a tube furnace for nitrogen purging, heating and calcination, and carbothermal reduction to obtain a solid sample, hydrothermal stirring the solid sample, followed by filtering, and evaporating to obtain Li2CO3; ultrasonically dispersing the attapulgite in an acid solution, and stirring in a water bath at 80° C.

Abstract: Disclosed is a method for determining 224Ra in a sediment by using a pulse ionization chamber emanometer, which belongs to the technical field of analysis and measurement. A pulse ionization chamber emanometer (PIC), a new emanometer, is used. Based on the half-life characteristics of different radon isotopes, one can separate the 220Rn activity from the total counts by dual counting. The resulting 220Rn measurement then can be used to determine the 224Ra activity in sediment according to the principle of secular radioactive equilibrium.

Abstract: A method for preparing a supported catalyst, including mixing waste lithium battery cathode material and biomass uniformly to obtain a mixture, then putting the mixture into a tube furnace for nitrogen purging, and then heating and calcining to obtain a solid sample after carbothermal reduction treatment; hydrothermally stirring the solid sample, followed by filtration to recover a residue, and drying the residue to obtain a mixed sample of Co3O4, TiO2, and biochar, labeled as TCO; ultrasonically dispersing the attapulgite in an acid solution, stirring in a water bath at 80° C.

Abstract: A method for preparing a supported catalyst, including mixing waste lithium battery cathode material and biomass uniformly to obtain a mixture, then putting the mixture into a tube furnace for nitrogen purging, and then heating and calcining to obtain a solid sample after carbothermal reduction treatment; hydrothermal stirring the solid sample, followed by filtration to recover a residue, and drying the residue to obtain a mixed sample of Co3O4, TiO2, and biochar, labeled as TCO; ultrasonically dispersing the attapulgite in an acid solution, stirring in a water bath at 80° C.

Abstract: A method for preparing two-dimensional sheet-like Li4SiO4 sorbent, including: obtaining LiCoO2 by performing discharging, aluminum foil stripping, and sieving on waste lithium battery cathode material, and drying; obtaining biomass by freeze-drying waste biomass, and grinding and sieving the freeze-dried waste biomass; mixing LiCoO2 and the biomass uniformly to obtain a mixture, and putting the mixture into a tube furnace for nitrogen purging, heating and calcination, and carbothermal reduction to obtain a solid sample, hydrothermal stirring the solid sample, followed by filtering, and evaporating to obtain Li2CO3; ultrasonically dispersing the attapulgite in an acid solution, and stirring in a water bath at 80° C.

Abstract: Disclosed is a method for determining 224Ra in a sediment by using a pulse ionization chamber emanometer, which belongs to the technical field of analysis and measurement. A pulse ionization chamber emanometer (PIC), a new emanometer, is used. Based on the half-life characteristics of different radon isotopes, one can separate the 220Rn activity from the total counts by dual counting. The resulting 220Rn measurement then can be used to determine the 224Ra activity in sediment according to the principle of secular radioactive equilibrium.