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Method for preparing pulp, pulp and paper made therefrom

A slurry and high-consistency refining technology, applied in pulp beating/refining methods, papermaking, textiles and papermaking, etc., can solve the problem that fiber bundles are difficult to be dissociated, which is not conducive to improving pulping yield, pulp strength, Fiber cutting and other problems, to achieve the effect of increasing the rate of fiber separation, increasing the strength, and improving the strength

Active Publication Date: 2016-05-11
GOLD EAST PAPER JIANGSU
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the power of the refiner is too high, the tooth disc of the refiner rotates too fast, and the fibers are easily cut off, which makes it difficult for the fiber bundles to be dissociated and scorched, which is not conducive to improving the pulping yield and the strength of the pulp

Method used

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  • Method for preparing pulp, pulp and paper made therefrom
  • Method for preparing pulp, pulp and paper made therefrom
  • Method for preparing pulp, pulp and paper made therefrom

Examples

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preparation example Construction

[0019] See figure 1 , a preferred embodiment of the present invention provides a method for preparing a slurry, which mainly includes the following steps:

[0020] S101: Prepare original pulp, the specific method is as follows: take at least one of hardwood chips, softwood chips and other wood chips as raw materials, and carry out conventional washing, steaming, squeezing, grinding and tearing and other treatments on the raw materials to obtain original pulp. The original pulp mainly contains pulp fibers 10 and water. The mass percentage of the original slurry is 25% to 50%.

[0021] S102: Provide hard grinding aid 30 (see figure 2 ). The mass of the hard grinding aid 30 is 3% to 20% of the absolute dry mass of the original slurry, preferably 6% to 10%. The hard grinding aid 30 may be any one or a mixture of precipitated calcium carbonate (PCC), ground calcium carbonate (GCC), talc (Talc), and titanium dioxide. The particle size of the hard grinding aid 30 is 0.2 to 50 ...

Embodiment 1

[0039] Prepare original pulp, the raw material of the original pulp is poplar chips, and the mass percentage of the original pulp is 45%. A hard grinding aid 30 is provided, and the hard grinding aid 30 is grade 65 GCC. To the original slurry, 8% of the absolute dry mass of the original slurry of grade 65 GCC was added and mixed uniformly to obtain a mixed slurry. The mixed slurry is subjected to high-consistency refining. The power of the refiner is 18MW. After the high-consistency refining treatment, the mixed pulp is subjected to bleaching, low-consistency refining, washing, screening and slag removal to obtain the desired pulp. And before screening and deslagging treatment, samples were taken to test the fiber bundle content and pulp quality in the pulp.

Embodiment 2

[0047] The steps and process parameters of Example 1 are basically the same, except that in this example, the filler grade PCC with 10% of the original slurry absolute dry mass is added to the original slurry. During the high-consistency refining process, the refiner The power is 25MW.

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Abstract

The invention provides a size preparation method. The size preparation method includes the following steps of providing raw size, subjecting the raw size to high-consistency size treatment, adding hard grinding aid by weight of 3-20% of that of completely dried raw size, wherein the grain diameter of the hard grinding aid ranges from 0.2-50 micrometers. The invention further provides size made by the size preparation method and paper made of the size.

Description

technical field [0001] The present invention relates to a preparation method of papermaking pulp, a papermaking pulp and paper prepared therefrom. Background technique [0002] The traditional alkaline hydrogen peroxide mechanical pulp (AlkalinePeroxideMechanicalPulp, referred to as APMP) pulping process, mainly through the mechanical action of the refiner to dissociate between fibers in the pulp, and usually by increasing the power of the refiner, In order to improve the rate of fiber broom. However, when the power of the refiner is too high, the toothed disc of the refiner rotates too fast, and it is easy to cut the fibers, making it difficult for the fiber bundles to be dissociated and brooming, which is not conducive to improving the pulping yield and the strength of the pulp. In particular, the above problems are particularly prominent when wood chips of different materials are mixed and pulped. SUMMARY OF THE INVENTION [0003] In view of this, there is provided a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D1/20
Inventor 韦丹王仁荣张明
Owner GOLD EAST PAPER JIANGSU
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