CN1238600C - Method for recycling pulp rejects - Google Patents
Method for recycling pulp rejects Download PDFInfo
- Publication number
- CN1238600C CN1238600C CNB02809641XA CN02809641A CN1238600C CN 1238600 C CN1238600 C CN 1238600C CN B02809641X A CNB02809641X A CN B02809641XA CN 02809641 A CN02809641 A CN 02809641A CN 1238600 C CN1238600 C CN 1238600C
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- CN
- China
- Prior art keywords
- effluent
- scummer
- weight
- paper
- commercially available
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
Abstract
The present invention relates to a process for recycling cleaner rejects from the preparation of paper, paperboard and cardboard and to their use for the preparation of paper in the paper stock or as a coating slurry for the paper industry.
Description
Technical field
The present invention relates to method for recycling, and the scummer effluent of described recirculation is in the paper pulp of papermaking or the purposes in the paper industry painting slurry to the scummer effluent in paper, cardboard and the card preparation process.
Background technology
In the paper preparation, also raw material (being wood pulp, timber, meticulous straw pulp or rag stock) is mixed with semi-finished product paper pulp, filler and the pigment of pulp again, so that obtain closely knit surface and therefore improve performance, the especially whiteness of paper, opaque and printability.
Nearly all paper, especially printing paper and writing paper all are mixed with filler, and these fillers provide pliability, whiteness and the sense of touch etc. of uniform shaping, improvement.These fillers are commonly referred to " ash content ", and this is that it is added in the fibrous suspension or in application step and uses because they are with the form reservation of ash content in combustion analysis.
Uncoated paper comprises the filler up to 35 weight %, and coated paper comprises the filler of 25-50 weight %.The consumption of filler depends primarily on the predetermined purposes of paper.Height adds to be filled out paper and has lower intensity and relatively poor sizability.
Filer content in paper pulp and is made up of the coating pigment of original pigment or recirculation usually between 5-35 weight %, and the coating pigment of described recirculation can derive from coating residue or coating effluent.Except to brightening the very important filler whiteness of paper, packing material size also plays an important role, this be because particle diameter to adding of paper fill out efficient and physical property particularly porosity very big influence is arranged.The filler that is added in the fibrous suspension has 20-80% to be retained in the paper approximately.
With the consumption is criterion, is considerable as filler and coating pigment following products now: kaolin, calcium carbonate, winnofil (PCC), artificial alumina silicate and hydrous oxide, titanium dioxide, satin white, talcum and calcium silicates.
After applying painting slurry and drying, with scraper with the paper equating.Thus obtained so-called scummer (cleaner) effluent (being also referred to as the coating effluent) is mainly by mineral and fibrous, and it can also account for the 1-4% of the paper total amount of producing.In most of the cases, they are discarded in the soot.Therefore, existing people advises using screw extruder that the scummer effluent is compressed and compacting, so that reduce its volume.Yet the total amount of the pending scummer effluent that is obtained does not but reduce.
In the past, the another kind of possible situation that the scummer effluent is handled is to utilize centrifugal pulp cleaner that it is carried out section processes, so that one side defibre and/or coating pigment and filler utilize them on the other hand at least in part again.
Therefore, the purpose of this invention is to provide the particularly new eco-friendly processing scheme of the effluent of centrifugal pulp cleaner of a kind of scummer effluent, and make its recirculation as far as possible fully.
Particularly, the object of the present invention is to provide a kind of method that the scummer effluent is carried out recirculation, this method can also be saved energy cost and cost of material, freight and topple over cost simultaneously.
According to the present invention, in the preparation process of paper, cardboard and card, by scummer effluent, the especially method for recycling of centrifugal pulp cleaner effluent have been realized above-mentioned purpose, described method is characterised in that: the scummer effluent that will comprise fiber, coating pigment and/or filler is ground to the particle diameter distribution of hope, randomly adds water, coating pigment, fresh filler and/or filler slurries; And be used for paper pulp and/or painting slurry as raw material.
Scummer effluent (being generally solid) comprises valuable raw material, and it can reclaim by method of the present invention, and can be recycled in each process of papermaking after grinding.Especially the scummer effluent that obtains from the paper mill for preparing coated paper or card comprises a large amount of coating pigment flakes.The thickness of coating is thick more, and is just difficult more by the technology recovery flakes of prior art.Double spread level or coating card level can be used as concrete example in the present invention and mention.The another kind of of paper industry is the production plant of SC-paper, and it loses a large amount of fillers by the scummer effluent.
Now,, the scummer effluent is ground, and randomly it is mixed with water, coating pigment, filler and/or filler slurries by the present invention.Powder with scummer effluent slurries or grinding is recycled in the paper-making process then, as paper pulp and/or painting slurry.
When the scummer effluent is carefully monitored, can find filler composition, coating pigment flakes, fibrous suspension residue (as fiber agglomerate or fragment), and exogenous impurity (for example sand).
After the scummer effluent was ground, the particle size distribution of the scummer effluent original distribution with coating pigment, filler or filler/pigment slurries basically was identical.Therefore,, can reclaim more than 95% of scummer effluent total amount, even all reclaim, and be recycled in the production process by the present invention.
For example, the scummer effluent that will handle according to the present invention makes the consumption of fresh filler or pigment obviously reduce as filler whereby.
According to the present invention, in the centrifugal pulp cleaner system to grinding preferred arrangement downstream of final stage in some stages of common centrifugal pulp cleaner of scummer effluent.The slurry that obtains from the scummer system of this increase was recirculated to the previous stage, and made the scummer effluent of residual volume form final effluent.
In existing scummer system, the simplest range of application comprises: arrange to grind in penultimate scummer stage back, and last purification process is used as terminal stage.
When carrying out method of the present invention, have found that the particle diameter of coating pigment flakes distributes and obtained improvement, and reached the initial distribution of granules of pigments.This can be by fine particle, and especially the fine particle that distributes from difference takes temperature out.The fiber knot is extracted out and has obtained significantly refining.
In papermaking,, adopt the filler and the coating pigment of the concentrated slurry form of the preferred 30-85 weight of powder type or solids content % usually for the preparation of paper pulp or painting slurry.Fresh filler and pigment are provided with the form of slurries or powder (whiteness and the size distribution that possess hope) by producer usually.
In scummer effluent processing procedure, to separate and lose the thick impurity component of forming by fragment, sand grains and other impurity certainly.For this reason, adopt the multistage centrifugal scummer usually.So the residue on sieve that obtains is made up of aggregation or pigment, fiber and the filler of fiber, filler, pigment, fine sand, black particle and filler and pigment.The fine grained that " filler " ordinary representation uses in paper pulp; " pigment " is illustrated in the fine grained that uses in the coating.
The conspicuous known method that can be used for separating undesirable inclusions in the scummer effluent is: flocculation and deposition, filtration, screening and/or centrifugation.In this case, there is the mixture of different pigment usually, wherein often comprises kaolin, calcium carbonate and talcum.In separation process, because flocculation and charge reversal often form aggregation; Can grind them now according to the present invention.
According to the present invention, can use dry grinding machine commonly used or wet lapping machine, especially for example have 700-5000L or more jumbo agitating ball mill (agitator ball mill), can be continuously or be ground into powder or slurries discontinuously.Used abrasive media, mill ball preferably especially has the mill ball of 1-4 mm dia.
For handling, be used for the sieve of removing impurities (spherical broken thing, parting material, iron rust or the like) usually, preferred sieve bend (sieve bends).In process of lapping, use laser measuring apparatus to measure and control the fineness of grinding, and use a computer agitating ball mill is controlled.
Therefore,, perhaps also randomly use it for paper pulp, need improve whiteness by known method itself for preparing new painting slurry.Preferably aggregation is dissociated, these aggregations have a negative impact to the flowability of painting slurry at the scraper place by forming edge of a knife trace line, and thus coating are had a negative impact.The use of dispersing aid, filler and pigment will reduce the wastage in bulk or weight of these materials in process of lapping.
In the scummer effluent, the ratio of filler and/or pigment and fiber can change on a large scale.According to the present invention, the particularly preferred scummer effluent that randomly is rich in filler and/or coating pigment that is to use, with solid content meter, described concentration range is between 5-90 weight %, particularly between 30-70 weight %.Therefore, fiber content, or the content of filler and/or coating pigment changes in can be very on a large scale, for example at 1-99 weight % or between 99-1 weight %, particularly between 30-70 weight %." be rich in " in the present invention especially to comprise and add fresh filler and/or fresh pigment.
Therefore, according to the present invention, preferably before grinding, afterwards and/or during, with kaolin, natural or winnofil, artificial or natural aluminium silicate and oxide hydrate, titanium dioxide, satin white, dolomite, mica, metal flakes (the particularly flakes of aluminium), bentonite, rutile, magnesium hydroxide, gypsum, phyllosilicate, talcum, calcium silicates and other rocks and earth as fresh pigment and/or fresh filler.
Described fresh pigment or fresh filler are preferably, in the presence of scummer effluent and grinding aid of choosing wantonly commonly used and/or dispersing aid, use with powder, the form that comprises the slurries of moisture fresh pigment and/or fresh filler, thereby provide solids content for example between 30-85 weight %, especially the slurries between 40-75 weight %.Grinding aid commonly used and/or dispersing aid are added in the slurries that solids content is 30-85 weight % in according to the preferred method of the present invention.
In the scummer effluent, the addition of optimum fiber, coating pigment and/or filler (recirculation or fresh) is 1-100 weight %.In the scummer effluent, the described grinding aid commonly used and/or the addition of dispersing aid are 1-100 weight % in according to the preferred method of the present invention.
Particularly preferably be interpolation water, so that the scummer effluent that will grind according to the present invention is used for the dilution slurries of paper pulp stream.Preferably using solids content to be 5-50 weight %, especially is the slurries of 10-20 weight %.Therefore, in the preferred embodiment of the invention,,, especially grind under the existence of the water of 100-1000 weight % at 1-1000 weight % with solid content meter.
Preferably the scummer effluent is ground to form slurries or powder with following size distribution:
Particle＜1 of 10-99 weight % micron, especially
Particle＜1 of 10-95 weight % micron,
Wherein respectively in equivalent diameter.
According to EP 0 625 611 A1, the size distribution of coating pigment is known, and it is preferably also regulated by the inventive method.Therefore, according to the present invention, especially preferably the scummer effluent is ground to form slurries or the powder with following size distribution:
A) particle of 95-100 weight %＜10 micron;
B) particle of 50-100 weight %＜2 micron, the especially particle of 50-95 weight %＜2 micron;
C) particle of 27-95 weight %＜1 micron, the especially particle of 27-75 weight %＜1 micron; With
D) particle of 0.1-55 weight %＜0.2 micron, the especially particle of 0.1-35 weight %＜0.2 micron;
Wherein all in the equivalent diameter of particle.According to the present invention, the grinding of preferred scummer effluent is especially carried out in vertical agitating ball mill in dry grinding machine or wet lapping machine.
In addition, according to the present invention, whiteness and size distribution have big change, and it particularly can be controlled by lapping mode and time.Therefore, might be on the spot thick relatively fresh filler and water be mixed with a large amount of scummer effluent, so as after to grind with in this slurries introducing paper pulp.Similarly, might use a small amount of scummer effluent, and carry out meticulous grinding on the spot with fresh pigment, then used as coating pigment, precoated shet especially.
As for example known by EP0 625 611 A1, although according to the present invention, during the scummer effluent mixes and grinds, can known wetting agent, stabilizing agent, grinding aid and the dispersing aid of use itself, but the compared with prior art obviously minimizing of its aequum.Contained a certain amount of described preparation that is circulated to according to the present invention in the paper-making process in the scummer effluent.
The powder or the slurries that obtain according to the present invention are specially adapted to paper industry, in particular for the coating of preparation paper coating or be used for paper pulp.When fiber content was low, the scummer effluent that grinds according to the present invention was preferred in the painting slurry, and when fiber content is high, is preferred in the paper pulp.According to the present invention, on sieve, obtained good retention (retention).Particularly preferably be, the scummer effluent that will grind according to the present invention is used to prepare offset paper.In addition, also be suitable for preparing the painting slurry that is used for lightweight coated paper, especially high coating speed according to slurries of the present invention, with be used for preparation wheel and change (rotary) offset paper, change the coating of offset paper, card and speciality paper (as label, wallpaper, silicone base paper, from-copy paper) especially for the wheel of preparation lightweight coating, and be used for gravure paper.Therefore, the coating pigment slurries that obtain according to the present invention are specially adapted to individual (sheet-fed) offset paper, in particular for single coating of individual offset paper, two coatings of individual offset paper: individual offset paper precoated shet and individual offset paper top coat; Being used for wheel changes offset paper, changes offset paper list coating, takes turns two coatings of changeing offset paper in particular for the LWC wheel: wheel changes the offset paper precoated shet and takes turns and change the offset paper top coat; Be used for gravure paper, in particular for the two coatings of LWC gravure paper list coating, LWC gravure paper: gravure paper precoated shet and gravure paper top coat; Be used for card, especially the two coatings of card: card precoated shet and card top coat; And be used for speciality paper, in particular for label and flexible package.
This method give to use the pigment slurry of the present invention's preparation that chance is provided, and do not make body paper, the quality of coating, especially the quality with its final products that make incurs loss.
Hereinafter, in order to describe, some coating formulations that can obtain (all numerical value convert the parts by weight (atro/ active component) of solid to) have been provided according to the present invention.The consumption of filler and/or pigment slurry can partly or entirely be substituted by the scummer effluent that grinds according to the present invention of phase application quantity.
1. individual (sheet-fed) offset paper
1.1 individual (sheet-fed) offset paper list coating
The commercially available CaCO of 70 weight portions
3(90 type)
The commercially available clay of 30 weight portions (high-quality, for example US No.1)
The commercially available emulsion (acrylate) of 11 weight portions
0.6 the commercially available carboxymethyl cellulose (CMC) of weight portion
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
0.5 the commercially available calcium stearate of weight portion
Solids content: 64%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
1.2 the two coatings of individual (sheet-fed) offset paper
1.2.1 individual (sheet-fed) offset paper precoated shet
The commercially available CaCO of 100 weight portions
3(75 or 60 type)
The commercially available emulsion of 10 weight portions
The commercially available starch of the 4 weight portions corn or the farina of oxidation (natural or)
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
Solids content: 66%
Brookfield viscosity (100/ minute): 1100mPa.s
PH value: 9.0
1.2.2 individual (sheet-fed) offset paper top coat
The commercially available CaCO of 70 weight portions
3(90 type)
The commercially available clay of 30 weight portions (high-quality, for example US No.1).
The commercially available emulsion (acrylate) of 10 weight portions
0.6 the commercially available carboxymethyl cellulose (CMC) of weight portion
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
0.7 the commercially available calcium stearate of weight portion
Solids content: 64%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
2. wheel changes offset paper
2.1LWC wheel changes offset paper list coating
The commercially available CaCO of 50 weight portions
3(90 type)
The commercially available clay of 50 weight portions (high-quality/Britain's clay)
The commercially available starch of the 2 weight portions corn or the farina of oxidation (natural or)
The commercially available emulsion (XSB) of 12 weight portions
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.7 the commercially available brightener (optional) of weight portion
0.5 the commercially available calcium stearate of weight portion
Solids content: 62%
Brookfield viscosity (100/ minute): 1400mPa.s
PH value: 8.5
2.2 wheel changes the two coatings of offset paper
2.2.1 wheel changes the offset paper precoated shet
The commercially available CaCO of 100 weight portions
3(75 or 60 type)
The commercially available starch of the 4 weight portions corn or the farina of oxidation (natural or)
The commercially available emulsion (XSB) of 12 weight portions
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
Solids content: 66%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 9.0
2.2.2 wheel changes the offset paper top coat
The commercially available CaCO of 60 weight portions
3(95 type)
The commercially available clay of 40 weight portions (high-quality/Britain's clay)
The commercially available emulsion (XSB) of 10 weight portions
0.6 the commercially available carboxymethyl cellulose of weight portion
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
0.5 the commercially available calcium stearate of weight portion
Solids content: 64%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
3. gravure paper
3.1LWC gravure paper list coating
The commercially available clay of 70 weight portions (common/Britain's clay)
The commercially available talcum of 30 weight portions
5.0 the commercially available emulsion (acrylic ester adhesive) of weight portion
0.2 the commercially available thickener (synthetic) of weight portion
1.0 the commercially available calcium stearate of weight portion
Solids content: 58%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
3.2 the two coatings of version printing paper
3.2.1 gravure paper precoated shet
The commercially available CaCO of 100 weight portions
3(75 type)
6.0 the commercially available emulsion (acrylic ester adhesive) of weight portion
0.3 the commercially available thickener (synthetic) of weight portion
0.5 the commercially available calcium stearate of weight portion
Solids content: 66%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 9.0
3.2.2 gravure paper top coat
The commercially available clay of 85 weight portions (Britain's clay)
The commercially available clay (calcined clay) of 15 weight portions
5.0 the commercially available emulsion (acrylic ester adhesive) of weight portion
0.2 the commercially available thickener (synthetic) of weight portion
0.8 the commercially available calcium stearate of weight portion
Solids content: 57%
Brookfield viscosity (100/ minute): 1300mPa.s
PH value: 8.5
4. card
4.1 the two coatings of card
4.1.1 card precoated shet
The commercially available CaCO of 100 weight portions
3(75 type)
The commercially available starch of the 3 weight portions corn or the farina of oxidation (natural or)
The commercially available emulsion (XSB) of 14 weight portions
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.5 the commercially available brightener (optional) of weight portion
Solids content: 66%
Brookfield viscosity (100/ minute): 1000mPa.s
PH value: 9.0
4.1.2 cardboard top coat
The commercially available CaCO of 50 weight portions
3(90 type)
The commercially available clay of 50 weight portions (high-quality/Britain's clay)
The commercially available emulsion (acrylate) of 13 weight portions
The commercially available adhesive (acrylate) that helps of 2 weight portions
0.8 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.6 the commercially available calcium stearate of weight portion
Solids content: 60%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
5. speciality paper
5.1. label
The commercially available clay of 70 weight portions (common/Britain's clay)
The commercially available titanium dioxide (rutile) of 10 weight portions
The commercially available CaCO of 20 weight portions
3(90 type)
The commercially available emulsion (XSB) of 16 weight portions
0.5 the commercially available curing agent (EH) (Lauxite, melamine resin, epoxy resin) of weight portion
0.6 the commercially available calcium stearate of weight portion
Solids content: 60%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
5.2 flexible package
The commercially available clay of 80 weight portions (common/Britain's clay)
The commercially available CaCO of 20 weight portions
3(90 type)
The commercially available emulsion (acrylate) of 14 weight portions
0.8 the commercially available carboxymethyl cellulose of weight portion
0.5 the commercially available curing agent of weight portion (Lauxite, melamine resin, epoxy resin)
0.6 the commercially available brightener (optional) of weight portion
1.0 the commercially available calcium stearate of weight portion
Solids content: 58%
Brookfield viscosity (100/ minute): 1200mPa.s
PH value: 8.5
Embodiment
The scummer effluent that will obtain from the method for the commercially available paper machine of prior art grinds to form the slurries of particle diameter＜10 micron the suspension of 15 weight %, and is added in the paper pulp stream.
Lapping device with after the scummer effluent that grinds according to the present invention is communicated with soon, just can make ash content increase in the paper.
Because described content of ashes increases, therefore can reduce the dosage of filler.By lapping device, approximately the flow with 16-18L/min will be conducted to paper pulp pond (pulp chest) by the pigment slurry that the scummer effluent that grinds is formed.For content of ashes being remained on predetermined steady state value, the consumption of fresh filler can be reduced to 6.0L/h from 10L/h.
At duration of test, the operation of lapping device is no problem.The content of ashes of slurry stream is changing in the scope usually.Retention has decline slightly during beginning, but will increase to general value in experimentation.The amount of the fresh pigment slurry of being saved is about 240L/h.
About 10 hours trial run shows: by method of the present invention, under the situation of not losing retention, can once more the scummer effluent of handling be used for paper pulp as filler.
The explanation of relevant scummer effluent slurry constituents:
Solids content: about 24.0%
The pigment ratio: about 85.0%, with solid content meter
Proportion of fibers: about 15.0%, with solid content meter
Claims (12)
1. one kind to the method for recycling from the scummer solid effluent of paper, cardboard and card preparation process, described method is characterised in that: grind the scummer effluent that comprises fiber, coating pigment and/or filler, randomly add water, coating pigment, fresh filler and/or filler slurries; And it is used for paper pulp and/or painting slurry as raw material.
2. according to the method for claim 1, it is characterized in that, separate the scummer effluent with deposition, filtration, screening and/or centrifugation by flocculation.
3. according to the method for claim 1, it is characterized in that the filler of used scummer effluent and/or the content of coating pigment are counted 1-99 weight % with solids content.
4. according to the method for claim 3, it is characterized in that the fiber content of used scummer effluent is counted 1-99 weight % with solids content.
5. according to the method for claim 1, it is characterized in that,, in the presence of the water of 1-1000 weight %, described scummer effluent is ground with solid content meter.
6. according to the method for claim 1, it is characterized in that, grinding aid and/or dispersing aid commonly used are added in the slurries that solids content is 30-85 weight %.
7. according to the method for claim 1, it is characterized in that in the scummer effluent, the described grinding aid commonly used and/or the addition of dispersing aid are 1-100 weight %.
8. according to the method for claim 1, it is characterized in that, the scummer effluent is ground to form slurries or powder with following size distribution: particle＜1 of 10-99 weight % micron, all in equivalent diameter.
9. according to the method for claim 1, it is characterized in that, the scummer effluent ground to form slurries and/or powder with following size distribution:
A) particle of 95-100 weight %＜10 micron;
B) particle of 50-100 weight %＜2 micron;
C) particle of 27-95 weight %＜1 micron;
D) particle of 0.1-55 weight %＜0.2 micron;
Wherein all in the equivalent diameter of particle.
10. according to the method for claim 1, it is characterized in that the grinding of scummer effluent is carried out in dry grinding machine or wet lapping machine.
11. the scummer effluent slurries that make according to each described method among the claim 1-10 are used for the purposes that paper industry prepares the precoated shet slurries.
12. the scummer effluent slurries that make according to each described method among the claim 1-10 are used for the purposes of paper making pulp.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10122331A DE10122331B4 (en) | 2001-05-08 | 2001-05-08 | Process for recycling and use of rejects |
| DE10122331.5 | 2001-05-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1524145A CN1524145A (en) | 2004-08-25 |
| CN1238600C true CN1238600C (en) | 2006-01-25 |
Family
ID=7684031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02809641XA Expired - Fee Related CN1238600C (en) | 2001-05-08 | 2002-01-24 | Method for recycling pulp rejects |
Country Status (25)
| Country | Link |
|---|---|
| US (1) | US20040168783A1 (en) |
| EP (1) | EP1313917B1 (en) |
| JP (1) | JP4463480B2 (en) |
| KR (1) | KR100778426B1 (en) |
| CN (1) | CN1238600C (en) |
| AT (1) | ATE266768T1 (en) |
| AU (1) | AU2002235867B2 (en) |
| BG (1) | BG108226A (en) |
| BR (1) | BR0209390A (en) |
| CA (1) | CA2443065C (en) |
| CZ (1) | CZ20033036A3 (en) |
| DE (2) | DE10122331B4 (en) |
| DK (1) | DK1313917T3 (en) |
| ES (1) | ES2201949T3 (en) |
| HU (1) | HUP0400018A3 (en) |
| MX (1) | MXPA03009321A (en) |
| NO (1) | NO20034968D0 (en) |
| PL (1) | PL206622B1 (en) |
| PT (1) | PT1313917E (en) |
| SI (1) | SI1313917T1 (en) |
| SK (1) | SK286317B6 (en) |
| TR (1) | TR200401126T4 (en) |
| UA (1) | UA74639C2 (en) |
| WO (1) | WO2002090651A1 (en) |
| ZA (1) | ZA200307798B (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19627523C1 (en) * | 1996-07-09 | 1997-10-23 | Alpha Calcit Fuellstoff Gmbh | Preparation of filler or pigment coating material for paper, pulp or board from waste sludge |
| EP2014830A1 (en) | 2007-06-22 | 2009-01-14 | Alpha Calcit Füllstoff Gesellschaft mbH | Manufacturing of coating colour dispersions |
| CA2720388C (en) | 2008-04-03 | 2013-11-26 | Innventia Ab | Composition for coating of printing paper |
| PT3617400T (en) | 2009-03-30 | 2022-12-30 | Fiberlean Tech Ltd | Use of nanofibrillar cellulose suspensions |
| NO2805986T3 (en) | 2009-03-30 | 2018-04-07 | ||
| GB0908401D0 (en) | 2009-05-15 | 2009-06-24 | Imerys Minerals Ltd | Paper filler composition |
| FI20095692A0 (en) | 2009-06-18 | 2009-06-18 | Upm Kymmene Oyj | Paper product and process for making it |
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