CN1388287A - Chemical treatment and hot pulping process of wood pulp and dreg pulp with mechanical mill and stone mill - Google Patents
Chemical treatment and hot pulping process of wood pulp and dreg pulp with mechanical mill and stone mill Download PDFInfo
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- CN1388287A CN1388287A CN 02114255 CN02114255A CN1388287A CN 1388287 A CN1388287 A CN 1388287A CN 02114255 CN02114255 CN 02114255 CN 02114255 A CN02114255 A CN 02114255A CN 1388287 A CN1388287 A CN 1388287A
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Abstract
The present invention features that after chemical treatment with alkali, the wood pulp is ground mechanically. Thus produced wood pulp has whiteness of 57-60 % (ISO), beating degree of 70-78 deg SR, breaking length greater than 2200 m, splitting index greater than 2.8 mN.sq.m square/g and wet weight of 4.0g. The present invention, as one optimized pulp grinding process, has simple process, low cost and high pulp grinidng effect.
Description
Technical field
The present invention relates to a kind of mechanical mill and stone ground wood screenings pulp handles and refining process
Background technology
In recent years, more and more higher to the quality requirement of newsprint along with the development of printing technology and improving constantly of living standards of the people, each papermaking enterprise is also seeking to improve the approach of newsprint quality by fair means or foul, to adapt to the needs of " entering the GATT " paper industry development.Main slurry kind as proportionaling collecting newsprint
How the mechanical mill and stone ground wood pulp improves and improves its pulp quality, to the stable of newsprint quality with improve, will play an important role.The mechanical mill and stone ground wood pulp belongs to physical method slurrying, and its slurrying characteristics are yield height, becomes the paper good in optical property, and cost is lower, but the intensity of slurry such as indexs such as fracture length, tear index are not as chemical pulp.Especially its screening slag slurry advances the mill defibrination without any effective processing, and refining effect is poor, and the slag pulp fibres that quality is not good enough is circulated in production procedure, has restricted the raising of mechanical mill and stone ground wood pulp pulp quality and output, thereby has influenced the quality of finished paper of newsprint.The mechanical mill and stone ground wood screenings pulp of my company invention is handled the defibrator process sizing process, takes that the slag slurry is added alkalization and learns after the processing defibrination again, and technology is simple, cost of investment is low, and bring notable results, improved the pulping intensity of Stone Ground Wood, created advantage to improving the newsprint product specification.
Summary of the invention
In order to overcome above-mentioned defective, the purpose of this invention is to provide a kind of chemical treatment and refining process thereof of mechanical mill and stone ground wood pulp screening slag slurry, mechanical mill and stone defibrination quality is obviously improved.
For achieving the above object, technical scheme of the present invention is as follows, and a kind of mechanical mill and stone ground wood screenings pulp is handled the defibrator process sizing process, it is characterized in that: to the slag slurry adding alkalization learn handle after defibrination again, parameter is as follows:
(1) slurry is mechanical mill and stone ground wood pulp (GP) screening slag slurry, slag slurry concentration: 2.5～4.5%, and beating degree: 30～40 ° of SR; (2) chemicals sodium hydroxide concentration: 0.1～0.8% (to oven dry stock);
(3) refining process condition: refining concentration 2.5～4.5%, concentration of lye 40～400g/l, 70～90 ℃ of defibrination temperature, defibrination pressure 0.1～1.0Mpa;
(4) chemicals adds point for screening slag slurry exit;
(5) the mechanical mill and stone ground wood pulp mass property that makes: mechanical mill and stone ground wood pulp whiteness is 57～60% (ISO), beating degree: 70～78 ° of SR, and fracture length is greater than 2200m, and tear index is greater than 2.8mNm
2/ g, weight in wet base is greater than 4.0g.
Pulping process of the present invention is simple, and cost of investment is low, and ton slurry cost increases about 7.2 yuan approximately.Overcome general mechanical mill and stone ground wood pulp the processing of the simple directly defibrination of screening slag slurry, refining effect difference have been caused the relatively poor phenomenon of pulp quality.Remarkable to improving mechanical mill and stone ground wood pulp pulp quality and output effect, its comprehensive benefit is obvious.At mechanical mill and stone ground wood screenings slurry optimization process process aspect, belong to domestic initiation, be to improve newsprint product quality class, adapting to the be growing more intense environment of competition of " entering the GATT " paper market provides powerful guarantee.
The specific embodiment
Embodiment:
With concentration is 2.8%, the screening slag slurry 1000Kg of 35 ° of SR of beating degree, adding 5Kg concentration in screening slag slurry exit is the NaOII chemicals of 200g/1, at refining concentration 2.7%, 70～90 ℃ of defibrination temperature, under defibrination pressure 0.1～1.0Mpa process conditions, handle through the disc mill defibrination of Φ 600mm, the beating degree of starching behind the defibrination is 45 ° of SR.Slurry is through with after system is mixed, together through screening, to purify, concentrate, obtain whiteness behind the hydrogen peroxide bleaching be 57～60% (ISO), 78 ° of SR of beating degree, fracture length 2300m, tear index 3.2mNm
2/ g, weight in wet base 4.0g mechanical mill and stone ground wood pulp is used for the high-grade newsprint of manufacturing paper with pulp.
Claims (1)
1, a kind of mechanical mill and stone ground wood screenings pulp is handled the defibrator process sizing process, it is characterized in that: to the slag slurry adding alkalization learn handle after defibrination again, parameter is as follows:
(1) slurry is mechanical mill and stone ground wood pulp (GP) screening slag slurry, slag slurry concentration: 2.5～4.5%, and beating degree: 30～40 ° of SR;
(2) chemicals sodium hydroxide concentration: 0.1～0.8% (to oven dry stock);
(3) refining process condition: refining concentration 2.5～4.5%, concentration of lye 40～400g/l, 70～90 ℃ of defibrination temperature, defibrination pressure 0.1～1.0Mpa;
(4) chemicals adds point for screening slag slurry exit;
(5) the mechanical mill and stone ground wood pulp mass property that makes:
Mechanical mill and stone ground wood pulp whiteness is 57～60% (ISO), beating degree: 70～78 ° of SR, and fracture length is greater than 2200m, and tear index is greater than 2.8mNm
2/ g, weight in wet base is greater than 4.0g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021142556A CN1177101C (en) | 2002-07-05 | 2002-07-05 | Chemical treatment and hot pulping process of wood pulp and dreg pulp with mechanical mill and stone mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021142556A CN1177101C (en) | 2002-07-05 | 2002-07-05 | Chemical treatment and hot pulping process of wood pulp and dreg pulp with mechanical mill and stone mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1388287A true CN1388287A (en) | 2003-01-01 |
| CN1177101C CN1177101C (en) | 2004-11-24 |
Family
ID=4743019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021142556A Expired - Fee Related CN1177101C (en) | 2002-07-05 | 2002-07-05 | Chemical treatment and hot pulping process of wood pulp and dreg pulp with mechanical mill and stone mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177101C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007140838A2 (en) * | 2006-06-08 | 2007-12-13 | Voith Patent Gmbh | Lignocellulosic fibrous material made of wood |
| WO2007140839A3 (en) * | 2006-06-08 | 2008-03-27 | Voith Patent Gmbh | Method for producing fibrous material made of wood |
| WO2007140837A3 (en) * | 2006-06-08 | 2008-04-03 | Voith Patent Gmbh | Method for producing fibrous material |
| WO2008077450A1 (en) * | 2006-12-23 | 2008-07-03 | Voith Patent Gmbh | Method for the production of tissue paper |
| WO2008138429A1 (en) * | 2007-05-11 | 2008-11-20 | Voith Patent Gmbh | Lignocellulose fibre consisting of wood |
| CN114411443A (en) * | 2021-12-28 | 2022-04-29 | 玖龙纸业（东莞）有限公司 | Pulping for preparing coating white board paper core layer and coating white board paper |
-
2002
- 2002-07-05 CN CNB021142556A patent/CN1177101C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007140838A2 (en) * | 2006-06-08 | 2007-12-13 | Voith Patent Gmbh | Lignocellulosic fibrous material made of wood |
| WO2007140838A3 (en) * | 2006-06-08 | 2008-03-27 | Voith Patent Gmbh | Lignocellulosic fibrous material made of wood |
| WO2007140839A3 (en) * | 2006-06-08 | 2008-03-27 | Voith Patent Gmbh | Method for producing fibrous material made of wood |
| WO2007140837A3 (en) * | 2006-06-08 | 2008-04-03 | Voith Patent Gmbh | Method for producing fibrous material |
| US8152960B2 (en) | 2006-06-08 | 2012-04-10 | Voith Patent Gmbh | Lignocellulosic fibrous material made of wood |
| US8758557B2 (en) | 2006-06-08 | 2014-06-24 | Voith Patent Gmbh | Process for producing fibrous material from wood |
| WO2008077450A1 (en) * | 2006-12-23 | 2008-07-03 | Voith Patent Gmbh | Method for the production of tissue paper |
| WO2008138429A1 (en) * | 2007-05-11 | 2008-11-20 | Voith Patent Gmbh | Lignocellulose fibre consisting of wood |
| CN114411443A (en) * | 2021-12-28 | 2022-04-29 | 玖龙纸业（东莞）有限公司 | Pulping for preparing coating white board paper core layer and coating white board paper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177101C (en) | 2004-11-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041124 Termination date: 20090805 |