Method for removing organic matter in waste mq bonded NdFeB magnetic powder by using sodium hydroxide chemical reaction method
A technology of sodium hydroxide and chemical reaction, applied to the removal of solid waste, etc., can solve problems such as incomplete methods
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example 1
[0016] A kind of mixed solvent formula for removing carbon and oxygen of waste and old MQ bonded NdFeB magnetic powder used in the present embodiment is: by solid mass and liquid volume ratio sodium hydroxide / dehydrated alcohol 3g / 100ml.
[0017] The method for removing carbon and oxygen of a kind of waste and old MQ bonded NdFeB magnetic powder involved in the present invention is carried out according to the following steps:
[0018] 1. Remove the solidified organic matter in the waste MQ bonded NdFeB magnetic powder: Put the waste MQ bonded NdFeB magnetic powder and the mixed solvent into the three-necked flask according to the mass ratio of 1:6, keep the pressure of the three-necked flask at normal pressure, and use poly Stir at a constant speed with a tetrafluoroethylene stirring paddle, and control the temperature at 20°C through a water bath, keep it warm for 6 hours, and take it out after the end to obtain the magnetic powder A;
[0019] 2. Remove the decomposition pro...
example 2
[0027] A kind of mixed solvent formula for removing carbon and oxygen of waste and old MQ bonded NdFeB magnetic powder used in the present embodiment is: by solid mass and liquid volume ratio sodium hydroxide / dehydrated alcohol 1g / 100ml.
[0028] The method for removing carbon and oxygen of a kind of waste and old MQ bonded NdFeB magnetic powder involved in the present invention is carried out according to the following steps:
[0029] 1. Remove the solidified organic matter in the waste MQ bonded NdFeB magnetic powder: Put the waste MQ bonded NdFeB magnetic powder and the mixed solvent into a three-necked flask at a mass ratio of 1:8, keep the pressure of the three-necked flask at normal pressure, and use poly Stir at a constant speed with a tetrafluoroethylene stirring paddle, and control the temperature at 70°C through a water bath, keep it warm for 24 hours, and take it out after the end to obtain the magnetic powder A;
[0030] 2. Remove the decomposition products of cure...
example 3
[0038] A kind of mixed solvent formula for removing carbon and oxygen of waste and old MQ bonded NdFeB magnetic powder used in the present embodiment is: by solid mass and liquid volume ratio sodium hydroxide / dehydrated alcohol 1g / 100ml.
[0039] The method for removing carbon and oxygen of a kind of waste and old MQ bonded NdFeB magnetic powder involved in the present invention is carried out according to the following steps:
[0040] 1. Remove the solidified organic matter in the waste MQ bonded NdFeB magnetic powder: Put the waste MQ bonded NdFeB magnetic powder and the mixed solvent into the three-necked flask according to the mass ratio of 1:6.5, keep the pressure of the three-necked flask at normal pressure, and use poly Stir at a constant speed with a tetrafluoroethylene stirring paddle, and control the temperature at 50°C through a water bath, keep it warm for 20 hours, and take it out after the end to obtain the magnetic powder A;
[0041] 2. Remove the decomposition ...
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