3 results about "Electronic scrap" patented technology

This disclosure concerns the evaluation of a noble metal content in batches of materials such as electronic scrap, and in particular printed circuit boards, which is an essential initial step when recycling is envisaged. A process is presented comprising the steps of: —imaging at least a statistical representative number of the boards of the batch; —processing the images to detect the printed circuit boards; —for each detected printed circuit board, extracting a board-related feature vector using image processing technology; and, —providing a model taking at least the board-related feature vectors as input and calculating the noble metal content of the batch as output, wherein the model is calibrated against batch-level noble metal assays. The present application deals directly with batches of printed circuit boards, allowing for an approach wherein a regression model is calibrated based on total batch assays. Printed circuit board component assays are not needed.

This application relates to a waste electronic metal pyrolysis recycling device, belonging to the technical field of electronic waste metal pyrolysis recycling. It includes a pyrolysis furnace, with a storage bin above the furnace. A first connecting pipe is fixedly connected to the bottom of the storage bin, and a second connecting pipe is fixedly connected to the bottom of the first connecting pipe. This application, by incorporating components such as an auger, a scale, and a solenoid valve, allows the reducing agent in the storage bin to fall into the second connecting pipe through the first connecting pipe during the pyrolysis of waste electronic materials. Starting a first motor drives a rotating rod and an auger to rotate, allowing the reducing agent to enter a measuring cylinder. The measuring cylinder and scale facilitate observation of the reducing agent level, thus allowing for determination of the dosage of reducing agent based on the amount of waste electronic materials. Opening the solenoid valve allows the third connecting pipe to input the reducing agent into the pyrolysis furnace, where it mixes with the waste electronic materials. This device enables the quantitative addition of reducing agent during the pyrolysis of waste electronic materials, significantly improving the metal recovery rate.

This invention relates to a method for preparing copper-based friction materials from copper-containing electronic waste, belonging to the field of electronic waste resource utilization technology. The invention involves uniformly mixing copper-containing electronic waste with copper-containing solid waste to obtain a mixture. This mixture is added to a smelting pool and heated to melt. Oxygen-enriched gas is introduced for oxidative smelting to obtain an oxidized melt. A reducing agent is added to the oxidized melt, and a protective gas is introduced for stirring and heat preservation for reduction smelting. Copper-rich alloy and slag are separated by sedimentation. The copper-rich alloy is powdered to obtain copper alloy powder. The copper alloy powder and friction components are uniformly mixed and pressed into a billet. The billet is sintered to obtain the copper-based friction material. The coefficient of friction of the copper-based friction material is 0.25~0.60, and the wear rate is ≤2.5×10⁻⁶. ‑ 7 cm 3 / J, with a hardness of 40~80HB. This invention achieves the synergistic treatment of copper-containing electronic waste and copper-containing solid waste through high-temperature smelting, efficiently recovering valuable metals, and directly preparing copper-based friction materials from the copper-rich alloy produced by smelting.