Method for producing corrugated base paper pulp by utilizing scrap materials of fibre board
A technology of corrugated base paper and leftover waste, which is applied in the field of pulp and papermaking, which can solve the problems of inability to realize clean and efficient utilization of fiberboard leftovers, large fiber damage, and large amount of chemicals, so as to reduce ineffective consumption, reduce damage, and use less Effect
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Embodiment 1
[0038] Fiberboard scraps are crushed and evenly soaked in hot water for 4 hours; the soaked fiberboard scraps are steamed at a steam pressure of 0.2-0.3Mpa for 10 minutes, and then screw-extruded. Add sodium hydroxide solution with a concentration of 30% by mass at the back of the press, and the dosage is 3% (for absolute dry materials). Using the high-concentration mixing effect of the extrusion screw, the chemical solution and the crude fiber are evenly mixed, and at the same time Using the heat energy generated by high-concentration extrusion mixing, the material and liquid medicine enter the subsequent impregnator at a higher temperature to complete the chemical reaction. The reaction conditions are: the temperature is 85 o C, the time is 30 minutes; the fiber material that has completed the chemical reaction is subjected to high-consistency refining with a disc refiner, and the pulp fibers after grinding are subjected to delamination treatment. Adding 50% of the slurry to...
Embodiment 2
[0040] Fiberboard scraps are crushed and evenly soaked in hot water for 4 hours; the soaked fiberboard scraps are steamed at a steam pressure of 0.2-0.3Mpa for 30 minutes, and then screw extruded. The concentration of sodium hydroxide solution at the back of the press is 30%, and the dosage is 5% of the total mass of the dry material. Using the high-concentration mixing effect of the extrusion screw, the chemical solution and the crude fiber are evenly mixed, and at the same time, the high-concentration The heat energy generated by extrusion and mixing makes the material and liquid medicine enter the subsequent impregnator at a higher temperature to complete the chemical reaction. The reaction conditions are: the temperature is 90 o C, the time is 60 minutes; the fiber material that has completed the chemical reaction is subjected to high-consistency refining with a disc refiner, and the pulp fibers after grinding are subjected to delamination treatment. Adding 50% of the slur...
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