Recovery method of waste circuit board
A technology of discarded circuit boards and recycling methods, applied in the direction of electronic waste recycling, recycling technology, solid waste removal, etc., can solve the problems of easy pollution of the environment, high energy consumption, high energy consumption and environmental pollution, and achieve good quality, The effect of low energy consumption and simple equipment
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Embodiment 1
[0037] 1. Put the discarded circuit boards with electronic components into an oil bath at 220°C to 300°C and heat until the solder melts. Then, put the discarded circuit boards with melted solder in a centrifuge, start the motor to rotate for 6 minutes, and solder It is detached from the circuit board under the centrifugal force generated by the rotation to realize recycling.
[0038] 2. Place the desoldered substrate and electronic components in a vacuum pyrolysis device to heat to 500°C, hold the final temperature for 20 minutes, collect the gas generated by thermal cracking, and condense it into liquid oil in a -20°C condensing device.
[0039] 3. Collect the pyrolysis oil obtained from pyrolysis, the circuit board substrate and electronic components after pyrolysis, so that the next step can be classified and recovered or separated and recovered.
[0040] in conclusion:
[0041] ①In the desoldering step, all electronic components fall off, and no electronic components are...
Embodiment 2
[0044] 1. Put the discarded circuit boards with electronic components into an oil bath at 220°C to 300°C and heat until the solder is melted. Then, put the discarded circuit boards with melted solder in a centrifuge, start the motor to rotate for 8 minutes, and solder It is detached from the circuit board under the centrifugal force generated by the rotation to realize recycling.
[0045] 2. Place the desoldered substrate and electronic components in a vacuum pyrolysis device to heat to 550°C, hold the final temperature for 30 minutes, collect the gas generated by thermal cracking, and condense it into liquid oil in a -30°C condensing device.
[0046] 3. Collect the pyrolysis oil obtained from pyrolysis, the circuit board substrate and electronic components after pyrolysis, so that the next step can be classified and recovered or separated and recovered.
[0047] in conclusion:
[0048] ①In the desoldering step, all electronic components fall off, and no electronic components...
Embodiment 3
[0051] 1. Put the discarded circuit boards with electronic components into an oil bath at 220°C to 300°C and heat until the solder is melted. Then, put the discarded circuit boards with melted solder in a centrifuge, start the motor to rotate for 10 minutes, and solder It is detached from the circuit board under the centrifugal force generated by the rotation to realize recycling.
[0052] 2. Place the desoldered substrate and electronic components in a vacuum pyrolysis device to heat to 600°C, hold the final temperature for 40 minutes, collect the gas generated by thermal cracking, and condense it into liquid oil in a -40°C condensing device.
[0053] 3. Collect the pyrolysis oil obtained by pyrolysis, the circuit board substrate and electronic components after pyrolysis, so as to classify and recover or separate and recover in the next step.
[0054] in conclusion:
[0055] ①In the desoldering step, all electronic components fall off, and no electronic components are attach...
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