Method for determining carbon black content of PE reclaimed material by using combustion method

[0028] A method for the carbon black content of PE recycled materials by combustion method, including the steps of initial weighing of PE recycled materials, pyrolysis, weighing after pyrolysis, combustion, and weighing after combustion, wherein pyrolysis is carried out at 600°C under nitrogen atmosphere , the holding time is extended to 50min, and the temperature is lowered to 450°C under the nitrogen atmosphere, then the nozzle is opened, and the combustion boat is dragged to the nozzle to cool for 5min, the atmosphere flow rate is the same as the existing detection standard, and then the combustion boat is removed Take it out of the combustion tube, cool it in a desiccator for 10-20 minutes, and weigh it; then put the combustion boat into the combustion tube, and pass air or oxygen into the combustion tube at a temperature of (600±20)°C at an appropriate flow rate , to burn the residual carbon black, take out the combustion boat from the combustion tube again, cool it in the...

[0031] A method for the carbon black content of PE recycled materials by combustion method, including the steps of initial weighing of PE recycled materials, pyrolysis, weighing after pyrolysis, burning, and weighing after burning, wherein PE recycled materials are heated in a nitrogen atmosphere at 600 ° C After pyrolysis, extend the holding time to 50 minutes, and then lower the temperature from 600°C to 400°C, and then open the nozzle to avoid partial oxidation of PE recycled materials in contact with air at a high temperature of 600°C, which will cause carbon black Content detection is not accurate.

[0033] A method for the carbon black content of PE recycled materials by combustion method, including the steps of initial weighing of PE recycled materials, pyrolysis, weighing after pyrolysis, burning, and weighing after burning. When the temperature is lowered from 850°C to 450°C, drag the combustion boat to the nozzle, cool for 5 minutes, cool to room temperature in a desiccator, and weigh it; Pass it into the combustion tube to burn the residual carbon black, take out the combustion boat from the combustion tube again, cool it in a desiccator for 10-20 minutes, and weigh it again.

[0034] Nitrogen gas is passed at the temperature of 0-850° C., so that the pyrolysis temperature condition is consistent with the pyrolysis temperature condition of the thermogravimetric analysis method.

[0035]After the above-mentioned high-temperature pyrolysis at 850°C, the temperature inside the tube is lowered to 450°C, which can avoid part of the PE recycled material being oxidized in c...