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Slurry treatment method, pulp produced by the method and paper produced by the pulp

A processing method and slurry technology, applied in fiber raw material processing, paper, papermaking, etc., can solve the problems of reducing production efficiency, corroding papermaking equipment, and adjusting pH value for a long time, so as to improve production efficiency, improve lubricity, The effect of shortening the slurry processing time

Active Publication Date: 2016-08-03
海南金红叶纸业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need to add inorganic acid and / or pH buffer solution in the process of adjusting the pH value in pulp, and the time to adjust the pH value is long, it is easy to corrode papermaking equipment and reduce production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of slurry: take broadleaf pulp and softwood pulp as raw materials, wherein the mass percentage of broadleaf pulp is 25%, and the mass percent composition of softwood pulp is 75%; add water to the raw material to configure it into A slurry with a mass percentage of 30%; dry powdered CMC (produced and sold by cpkelco company) is added to the slurry, and the amount of CMC added is 0.1% of the dry slurry mass.

[0025] Kneading the slurry: put the above-mentioned slurry containing CMC into the kneading machine, set the pressure of the kneading machine to 0.012Mpa, the outlet temperature of the kneading machine is about 75°C, and the stirring speed is 40r / min. The slurry of CMC was kneaded and stirred for 30 minutes.

[0026] Slurry treatment: mix the kneaded slurry with water to form a mixed solution, the mass percentage of the slurry in the mixed solution is 1.5%; put the mixed solution in a slurry machine (provided by BTG company) Stir at a speed of 50r / s for...

Embodiment 2

[0029] The method in this example is basically the same as the slurry treatment method in Example 1, except that the amount of CMC added in this example is 0.5% of the dry slurry mass.

Embodiment 3

[0031] The method of this example is basically the same as the slurry treatment method of Example 1, except that the amount of CMC added in this example is 1% of the dry slurry mass.

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PUM

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Abstract

A slurry processing method comprises following steps: providing slurry with a mass percentage of 20% to 35%, adding sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, and sodium carboxymethyl starch into the slurry, controlling the adding amounts of sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, and sodium carboxymethyl starch in the range of 0.1 to 1% of mass of the absolute dry slurry, and putting the slurry added with sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, and sodium carboxymethyl starch in a kneader to carry out a kneading treatment to make sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, and sodium carboxymethyl starch to form anion groups and absorb on the fiber surfaces in the slurry. The invention also provides paper pulp prepared by the method mentioned above, and paper prepared from the paper pulp.

Description

technical field [0001] The invention relates to a method for treating papermaking slurry, the prepared pulp and paper made from the pulp. Background technique [0002] In the prior art, sodium carboxymethyl cellulose (CMC) is usually added to the pulp, so that CMC is adsorbed on the fibers of the pulp to improve the amount of negative ions on the surface of the fibers and the lubricity and tearability of the fibers in the pulp. Since both the carboxyl group of CMC and the fibers in the pulp have negative charges, how to overcome the electrostatic repulsion is the key to increasing the adsorption capacity of CMC. [0003] In order to improve the adsorption capacity of CMC on the fiber surface in the slurry, the traditional method is: add CMC diluent to the pulp to obtain a mixed solution, then adjust the pH value of the mixed solution to below 4 by adding inorganic acid to promote CMC protonation, and then Increase the adsorption capacity of CMC on the fiber surface. Since ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/26D21H17/28
Inventor 展恒金孟锡泉刘小龙陈海霞
Owner 海南金红叶纸业有限公司
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