13 results about "Electronic scrap" patented technology

The invention discloses a photovoltaic waste silicon and recycled carbon composite granulation coating process, and relates to the field of new energy materials. According to the method, high-purity silicon waste sheets recovered from retired photovoltaic modules and carbon materials recovered from electronic wastes are subjected to composite granulation, and a carbon coating layer is formed through heat treatment. The preparation method specifically comprises the steps of raw material pretreatment, mixing, granulation forming, coating carbonization, post-treatment and the like, the prepared silicon-carbon composite particles have good conductivity and structural stability and can be used for lithium ion battery negative electrode materials, and efficient recycling of resources and environment-friendly production are achieved.

The utility model discloses an electronic technology waste product smashing device, and belongs to the field of smashing equipment, the electronic technology waste product smashing device comprises a shell, a feeding port is fixedly connected to the upper portion of the shell, a discharging port is fixedly connected to the lower portion of the shell, a smashing assembly is arranged on the inner surface of the shell, the smashing assembly comprises a supporting seat, and the supporting seat is fixedly connected with the rear portion of the shell; a motor is fixedly connected to the lower portion of the supporting seat, a first rotating shaft is fixedly connected to the output end of the motor through a coupler, the first rotating shaft penetrates through and is rotationally connected with the rear portion of the shell, a second rotating shaft penetrates through and is rotationally connected with the rear portion of the shell, and the front ends of the first rotating shaft and the second rotating shaft are rotationally connected with the inner surface of the shell. According to the electronic waste crushing device, the crushing assembly is arranged to crush the electronic waste, the crushing assembly can crush the electronic waste firstly and then grind the electronic waste into powder, and the effect of conveniently and efficiently crushing the electronic waste is achieved.

The application provides a method for efficiently recycling valuable elements by synergistically smelting neodymium iron boron waste and electronic waste, which comprises the following steps: preparing a mixture of powdered neodymium iron boron waste, fine-grained electronic waste, a slagging agent and a solid reducing agent; and using a top-blown smelting furnace to oxidize and reduce the mixture; by controlling the conditions of the oxidation process, the iron and rare earth in the mixture are oxidized into oxides and enter the slag, copper is not oxidized and captures rare and precious metals such as gold and silver to form crude copper and sink to the bottom of the furnace and is discharged; by controlling the conditions of the reduction process, the iron oxide in the mixed rare earth slag is reduced to metallic iron, and the rare earth oxide is not reduced and remains in the slag layer; the iron with a larger density than the rare earth slag sinks to the bottom of the furnace, and after static stratification, the iron and the rare earth slag are discharged from the metal outlet and the slag outlet respectively, so that the separation of the rare earth and the iron is realized; and finally, the synchronous recovery of the rare earth, the iron in the neodymium iron boron waste and the copper, gold and silver in the electronic waste is realized; the method has a short process flow, low energy consumption and good economic and environmental benefits.

The utility model discloses a deep recovery device for precious metal in electronic waste, and relates to the technical field of precious metal recovery. According to the deep recovery device for the precious metal in the electronic waste, by arranging the reaction tank, a second gear, a first gear, a rotating shaft, a first belt wheel, a second belt wheel, a transmission belt, a stirring rod and a stirring rod, the multiple stirring function is achieved, the reaction tank rotates in the direction opposite to the stirring rod while the stirring rod rotates, stirring of reactants is enhanced, and the effect is improved. The reaction of reactants can be fully completed; by arranging the first connecting pipe, the spray tower, the exhaust port, the filter layer, the spray pipe and the high-pressure spray head, the function of treating gas generated by reaction is realized, harmful gas can be generated while reactants react, and direct emission of the gas can cause harm to the body of a worker and influence on the environment at the same time.

The invention discloses a dynamic separation method and device for mixed iron powder, and belongs to the technical field of powder material separation. According to the method, a three-stage magnetoelectric field synergistic separation normal form of'weak magnetic pre-separation-electric field fixing-strong magnetic field cleaning 'is innovatively provided, a 5-10 Hz low-frequency micro-vibration active agglomeration breaking technology is integrated, the core problems that strong magnetic powder interferes with weak magnetic powder separation and particles adhere are solved by dynamically regulating and controlling the magnetic field gradient and the electric field intensity, and the separation efficiency reaches up to 95.2%. On the device, through the collaborative design of a translational substrate, a micro-vibration motor, a permanent magnet sliding table, a long-strip-shaped electrode and a space orthogonal collection box, the separation path is free of interference. The method is optimized on the basis of a'multi-field-particle 'closed-loop coupling model, and is particularly suitable for scenes with high requirements on drying and purity, such as waste lithium battery recovery, electronic waste treatment and micro-scale precision manufacturing.

A method for obtaining metals of the 8th to 14th groups, in particular raw copper, comprises the following steps: i) providing and melting down a mixed feed comprising electronic waste in a smelting reactor, so that a first melt with a first metallic phase and a first slag phase is formed; ii) separating out the first slag phase from the smelting reactor; iii) refining the remaining first metallic phase by means of an oxygen-containing gas, possibly with the addition of copper-containing residual materials, so that a second, copper-enriched slag phase is formed; iv) possibly separating off the second slag phase and repeating the step; v) separating off the refined first metallic phase from the smelting reactor; and vi) adding a further mixed feed comprising electronic waste to the remaining second, copper-enriched slag phase and repeating process steps i) to vi).

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.

The invention relates to a method for recovering rare earth elements and base metals from magnet waste of electronic waste. The method of the present invention provides simple and easy-to-operate steps including demagnetization by heat treatment, ball milling, leaching, precipitation and selective extraction. The invention provides a simple, easy-to-operate and environment-friendly method for recovering rare earth elements and base metals from neodymium (Nd) magnet waste of electronic waste. The method recovers 90.6%-99% of rare earth elements with the purity of 96.3%-99.5%.

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 provides a method for recovering valuable elements from NdFeB waste through co-reduction smelting of electronic waste. The method involves mixing powdered NdFeB waste and fine-grained electronic waste with a slagging agent and a solid reducing agent, and then using a top-blown smelting furnace to reduce and smelt the mixture. By controlling the conditions of the reduction process, the oxides of copper and iron in the mixture are reduced to metallic copper and metallic iron. These two metals then aggregate with rare and precious metals such as gold and silver from the electronic waste to form a copper-iron precious metal alloy. Rare earth oxides are not reduced and remain in the slag layer. The copper-iron precious metal alloy particles are denser than the rare earth slag and sink rapidly to the bottom of the furnace. After settling and stratification, the copper-iron precious metal alloy melt and the rare earth slag are discharged separately from the metal outlet and slag outlet, respectively. This method achieves the simultaneous recovery of rare earth elements from NdFeB waste and copper, gold, and silver from electronic waste. The process is short, energy-efficient, and offers significant economic and environmental benefits.

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.

The invention provides a method for recovering valuable elements through reduction smelting of neodymium iron boron waste and electronic waste, which comprises the following steps: proportioning powdery neodymium iron boron waste, fine granular electronic waste, a slag former and a solid reducing agent, and carrying out reduction smelting on the mixture by using a top-blown smelting furnace; by controlling the conditions of the reduction process, copper and iron oxides in the mixed material are reduced into metal copper and metal iron, the metal copper and the metal iron are gathered with gold, silver and other rare and precious metals in the electronic waste to form a copper-iron precious metal alloy, rare earth oxides are not reduced and reserved in a slag layer, and the density of copper-iron precious metal alloy particles is larger than that of rare earth slag; according to the method, the rare earth slag is separated from the metal port and the slag port, the rare earth slag rapidly descends in the slag layer and sinks to the bottom of the furnace, copper-iron precious metal alloy melt and the rare earth slag are discharged from the metal port and the slag port respectively after standing layering, finally, synchronous recovery of rare earth in neodymium iron boron waste and copper, gold and silver in electronic waste can be achieved, and the method is short in process and low in energy consumption and has good economic and environment-friendly benefits.

The invention provides a method for efficiently recovering valuable elements through collaborative smelting of neodymium-iron-boron waste and electronic waste, which comprises the following steps: proportioning powdery neodymium-iron-boron waste, fine-particle electronic waste, a slag former and a solid reducing agent, and carrying out redox smelting on a mixture by using a top-blown smelting furnace; by controlling the conditions of the oxidation process, iron and rare earth in the mixed material are oxidized into oxides to enter slag, copper is not oxidized, and gold, silver and other rare and precious metals are captured to form crude copper which sinks to the bottom of the furnace and is discharged; by controlling the conditions of the reduction process, iron oxide in the mixed rare earth slag is reduced into metal iron, rare earth oxide is not reduced and reserved in a slag layer, iron sinks to the bottom of the furnace due to the fact that the density of the iron is larger than that of the rare earth slag, the iron is discharged from a metal opening and a slag opening after standing and layering, and separation of rare earth and iron is achieved. And finally, synchronous recovery of rare earth and iron in the neodymium iron boron waste and copper, gold and silver in the electronic waste can be achieved, and the method is short in process and low in energy consumption and has good economic and environment-friendly benefits.