CN100535242C - Slurry type heavy calcium carbonate of added porcelain clay for making paper and its preparing method - Google Patents
Slurry type heavy calcium carbonate of added porcelain clay for making paper and its preparing method Download PDFInfo
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- CN100535242C CN100535242C CNB2007100136779A CN200710013677A CN100535242C CN 100535242 C CN100535242 C CN 100535242C CN B2007100136779 A CNB2007100136779 A CN B2007100136779A CN 200710013677 A CN200710013677 A CN 200710013677A CN 100535242 C CN100535242 C CN 100535242C
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Abstract
The present invention discloses a kind of paste natural calcium carbonate into which a porcelain clay is added for making paper and its preparation method. It is made up by using (by weight portion) 720-850 portions of natural calcium carbonate, 14-18 portions of dispersing agent sodium polyacrylate, 180-300 portions of porcelain clay and proper quantity of water as raw material through the processes of mixing, buffering, grinding, screening and separation, etc.
Description
Technical field
The present invention relates to pulp technology for making paper, especially relate to a kind of slurry type heavy calcium carbonate of the added porcelain clay for making paper that production paper making and cloth coating coating uses and method for preparing the slurry type heavy calcium carbonate of this added porcelain clay for making paper of being used for.
Background technology
In paper technology, using powdered whiting to produce the coating composition that is used for paper products is a kind of very general technology.It is low that current people use the paper products coating composition of powdered whiting production to exist whiteness mostly, phenomenons such as luminance difference, people adopt the mode of adding china clay to solve this problem more, but at present people use with china clay and powdered whiting paper products coating composition as raw material production, in order to improve good coat covering to the coated paper paper, adopt improved its solid content more, therefore also exist high viscosity, rheological characteristic is poor, be difficult for disperseing, problems such as compatibility difference and viscosity shakiness, do not fit into the production requirement of high-speed paper machine, influenced normal production.
Summary of the invention
Technical problem to be solved by this invention has provided a kind of slurry type heavy calcium carbonate of added porcelain clay for making paper, it not only has higher whiteness and solid content, and particle diameter is thin, viscosity is low, easy dispersion, have stability and rheological characteristic preferably, can adapt to the production requirement of high-speed paper machine fully.
The present invention also provides a kind of slurry type heavy calcium carbonate method for preparing added porcelain clay for making paper, adopt this method to prepare the slurry type heavy calcium carbonate of added porcelain clay for making paper, not only simple and convenient, and the slurry type heavy calcium carbonate whiteness of the added porcelain clay for making paper of preparation is good, the solid content height, and particle diameter is thin, viscosity is low, easy dispersion, has stability and rheological characteristic preferably.
The slurry type heavy calcium carbonate of this added porcelain clay for making paper, be to form: 720～850 parts of powdered whitings by following weight part ratio feedstock production, 14～18 parts of dispersant Sodium Polyacrylates, 180～300 parts of china clay and suitable quantity of water, wherein the interior solid content of the slurry type heavy calcium carbonate of Zhi Bei interpolation china clay is higher is 〉=73.5%, and less than 2um particle diameter particle ratio 〉=98.0%, and less than 1um particle diameter particle ratio 〉=80.0%, 325 screen residues (%)≤0.002, viscosity≤600mpas, degree of after-tacking (mpas)≤900, so it has higher solid content, and particle diameter is thin, viscosity is low, easily disperse, therefore its stability and rheological characteristic are also better, and its hydrochloric acid insoluble substance 〉=15.0%, PH (10%) value 8～10, ISO whiteness (%) 〉=91.0, and powdered whiting adopts grain diameter can adopt 400 purpose heavy calcium carbonates, to improve its performance of sizing mixing.
Adopt the slurry type heavy calcium carbonate of this added porcelain clay for making paper, to have whiteness good because of it, the solid content height, and particle diameter is thin, viscosity is low, easily disperse, and characteristics such as stable preferably and rheological characteristic, therefore can prepare height contains admittedly, low viscosity, the coating that rheological characteristic is good, easy to operate, have excellent compatibility and viscosity stability, can be fit to the requirement of high-speed paper machine fully, and can improve the smoothness of coated paper paper well, whiteness, improve the outward appearance of paper, improve the brightness of coated paper, opacity and glossiness have the good coat covering, can significantly improve the ink absorption and the printing printability of paper simultaneously, make it to be fit to the requirement of printing, the slurry type heavy calcium carbonate of this added porcelain clay for making paper also has lower wearing valve, less residue on sieve content has reduced the wearing and tearing to paper system and copper mesh, improves quality of finished paper.
The slurry type heavy calcium carbonate method of preparation added porcelain clay for making paper is a raw material for adopting heavy calcium carbonate, china clay and dispersant Sodium Polyacrylate, under stirring condition, heavy calcium carbonate added in the water contain the dispersant Sodium Polyacrylate and size mixing, produce the slurry type heavy calcium carbonate of added porcelain clay for making paper then through multiple tracks grinding step, screening and centrifugation, wherein when carrying out each road grinding step, also add dispersant respectively in proportion, and in the end add china clay during one grinding step and together grind.
And in order can evenly to mix and to enhance productivity at preparation process Central Plains slip and finished product slurry, can after sizing mixing, powdered whiting carry out raw material buffering operation to former slip, and after screening, the finished product slurry is carried out finished product buffering operation, raw material buffering operation and finished product buffering operation are under stirring condition carries out.
Can adopt four road grinding steps aborning,, reduce the endocorpuscular particle diameter of product, and make the particle size distribution in the finished product even to improve grinding effect to particle.。
Can under stirring condition be that 720～850 parts of heavy calcium carbonates add to fill to contain in the container of water that weight part ratio is 3.5～4.5 dispersant Sodium Polyacrylates and stir to size mixing with weight part ratio, the former slip that will mix up then carries out the raw material buffering in buffer container under stirring condition, grind through four road grinding steps successively afterwards, and to add weight part ratio when each road grinding step respectively be 2.6～3.4 dispersant Sodium Polyacrylate, adding simultaneously weight part ratio and be 180～300 parts china clay when the 4th road grinding step grinds together and makes the finished product slurry, to make and under stirring condition, in buffer container, carry out the finished product buffering again after the finished product slurry screens, afterwards through promptly making the slurry type heavy calcium carbonate finished product of added porcelain clay for making paper after the centrifugal separation process, and to sizing mixing, be in being provided with the container of agitator when raw material buffering and finished product buffering and carry out, agitator speed is 200r/min when sizing mixing simultaneously, and maintenance 30min, and raw material buffering agitator speed can adopt 100r/min, the rotating speed of centrifuge can keep rotating speed 1200r/min when centrifugation, and powdered whiting adopts grain diameter can adopt 400 purpose heavy calcium carbonates, to improve its performance of sizing mixing.And in order to improve the content of small size particle in the product, when sieve elder generation, can adopt 150 purpose screen clothes to screen, large-size particles is thoroughly removed, the product cut size narrow distribution range, and in the middle of the production of reality, the time of the use of screen cloth and stirring, separation during for the rotating speed of the rotating speed of agitator, centrifuge, sieve elder generation, and each raw material uses proportioning, can carry out suitable adjustment according to the needs in the actual production, these are the known general knowledge of those skilled in the art.
Adopt this method to produce the slurry type heavy calcium carbonate of added porcelain clay for making paper, adding cooperation by the Sodium Polyacrylate dispersant step by step by proportioning produces, calcium carbonate alkalescent characteristics have been taken into full account, making product have height contains admittedly, characteristics such as low viscosity, and many wet milk series connection are produced, continuous feed, continuously grinding, guarantee that product has excellent particle size, and by raw material and finished product buffering operation, can make former slip of former small lot batch manufacture and finished product slurry mix when compiling storage, so that carry out the production of next procedure, technology is continuous, the automaticity height makes product have good stability preferably.And when producing, adopt and directly add the china clay dispersion, the one, can be directly used in the coating of paper machine and use, the 2nd, improve china clay and disperse particle diameter and dispersion effect, the 3rd, reduce the on-the-spot china clay production cost expense of adding of paper machine, effectively improved the performance and the paper product quality of paper making and cloth coating pigment.
In the present invention, the container that has agitator that uses of sizing mixing can adopt the stainless steel cauldron that is provided with agitator, raw material buffering and finished product buffering then can adopt the surge tank that is provided with agitator, grinding can be adopted wet milk commonly used in present people's production, and screening installation and centrifuge all adopt people's applied equipment in actual production at present, and raw materials such as heavy calcium carbonate, china clay and dispersant Sodium Polyacrylate also are people's products commonly used in producing at present, all commercially available obtaining.
Description of drawings
Accompanying drawing is the process chart that the present invention prepares the slurry type heavy calcium carbonate method of added porcelain clay for making paper.
As shown in drawings, at first prepare burden, it is former adopting heavy calcium carbonate, china clay and dispersant polyacrylic acid sodium Material, under the condition that stirs with heavy calcium carbonate with contain the water mixing accent of dispersant polyacrylic acid sodium Slurry is transported to then and carries out the raw material buffering in the raw material buffer unit under the condition that stirs, afterwards through four roads The grinding step of the grinder that arranges successively, and under the condition that is stirring after the screening, carry out finished product buffering operation, Produce the slurry type heavy calcium carbonate of added porcelain clay for making paper finally by the centrifugation of centrifuge, and will make Finished product be transported to the storage of finished products device and store, wherein when carrying out each road grinding step respectively in proportion Add dispersant polyacrylic acid sodium, and adding china clay grinds together when last one grinding step.
The specific embodiment
Embodiment one
Get the raw materials ready: raw material adopts 800 kilograms of 400 order heavy calcium carbonates, 16 kilograms of dispersant Sodium Polyacrylates, 200 kilograms of china clay;
Join slurry: water, dispersant are joined in the container that is provided with agitator for 4.0 kilograms, open and stir and drop into 800 kilograms of Paris whites and size mixing;
Raw material buffering: slurry input raw material surge tank is opened stirring carry out the raw material buffering;
Grind: open each road grinder, and former slip is input in each road grinder, and progressively drip the dispersant Sodium Polyacrylate with entering of slurry in each road grinder, wherein the dripping quantity of one grinder dispersant Sodium Polyacrylate is 3.0 kilograms; The dripping quantity that two road machines grind the dispersant Sodium Polyacrylate is 3.0 kilograms; The dripping quantity that three road machines grind the dispersant Sodium Polyacrylate is 3.0 kilograms; The dripping quantity of four road grinder dispersant Sodium Polyacrylates is 3.0 kilograms, and evenly adds 200 kilograms of china clay at four road grinders gradually with entering of slurry simultaneously;
Screening: adopted the screening machine of 150 eye mesh screens to screen;
Finished product buffering: slurry input finished product surge tank is opened stirring carry out the finished product buffering;
Centrifugation: slurry is transported to centrifugal separator to be separated, to remove the big particle in the slurry;
Storage of finished products: from the centrifugal separator sample examination, as the every index of product qualified after, feed liquid be transported to enter in the finished product jar store, promptly make the slurry type heavy calcium carbonate finished product of added porcelain clay for making paper.
Solid content 80% in the slurry type heavy calcium carbonate that makes, less than 2um particle diameter particle ratio 98.8%, less than 1um particle diameter particle ratio 85.2%, 325 screen residues (%) 0.001, viscosity 580mpas, degree of after-tacking (mpas) 860, hydrochloric acid insoluble substance 17.0%, PH (10%) value 8～10, ISO whiteness (%) 93.2.
Embodiment two
Step is with embodiment one, wherein
Raw material adopts 720 kilograms of heavy calcium carbonates, 14 kilograms of dispersant Sodium Polyacrylates, 180 kilograms of china clay when getting the raw materials ready; Adopt water, dispersant to join in the container that is provided with agitator for 3.6 kilograms when starching and join, open to stir also and drop into 800 kilograms of Paris whites and size mixing;
Then adopting the dripping quantity of one grinder dispersant Sodium Polyacrylate when grinding is 2.6 kilograms; The dripping quantity that two road machines grind the dispersant Sodium Polyacrylate is 2.6 kilograms; The dripping quantity that three road machines grind the dispersant Sodium Polyacrylate is 2.6 kilograms; The dripping quantity of four road grinder dispersant Sodium Polyacrylates is 2.6 kilograms, and evenly adds 180 kilograms of china clay at four road grinders gradually with entering of slurry simultaneously;
Solid content 75% in the slurry type heavy calcium carbonate that makes, less than 2um particle diameter particle ratio 98.3%, less than 1um particle diameter particle ratio 83.2%, 325 screen residues (%) 0.001, viscosity 560mpas, degree of after-tacking (mpas) 830, hydrochloric acid insoluble substance 16.2%, PH (10%) value 8～10, ISO whiteness (%) 91.2.
Embodiment three
Get the raw materials ready: raw material adopts 850 kilograms of heavy calcium carbonates, 18 kilograms of dispersant Sodium Polyacrylates, 300 kilograms of china clay;
Join slurry: water, dispersant are joined in the container that is provided with agitator for 4.5 kilograms, open and stir and drop into 850 kilograms of Paris whites and size mixing;
Grind: open each road grinder, and former slip is input in each road grinder, and progressively drip the dispersant Sodium Polyacrylate with entering of slurry in each road grinder, wherein the dripping quantity of one grinder dispersant Sodium Polyacrylate is 3.6 kilograms; The dripping quantity that two road machines grind the dispersant Sodium Polyacrylate is 3.5 kilograms; The dripping quantity that three road machines grind the dispersant Sodium Polyacrylate is 3.4 kilograms; The dripping quantity of four road grinder dispersant Sodium Polyacrylates is 3.0 kilograms, and evenly adds 300 kilograms of china clay at four road grinders gradually with entering of slurry simultaneously;
Screening: adopted the screening machine of 150 eye mesh screens to screen;
Centrifugation: slurry is transported to centrifugal separator to be separated, to remove the big particle in the slurry;
Storage of finished products: from the centrifugal separator sample examination, as the every index of product qualified after, feed liquid be transported to enter in the finished product jar store, promptly make the slurry type heavy calcium carbonate finished product of added porcelain clay for making paper.
Solid content 74% in the slurry type heavy calcium carbonate that makes, less than 2um particle diameter particle ratio 98.1%, less than 1um particle diameter particle ratio 81.2%, 325 screen residues (%) 0.001, viscosity 610mpas, degree of after-tacking (mpas) 860, hydrochloric acid insoluble substance 15.2%, PH (10%) value 8～10, ISO whiteness (%) 91.0.
Claims (3)
1, a kind of slurry type heavy calcium carbonate method for preparing added porcelain clay for making paper, it is characterized in that: under stirring condition, heavy calcium carbonate added in the water contain the dispersant Sodium Polyacrylate and size mixing, produce the slurry type heavy calcium carbonate of added porcelain clay for making paper then through four road grinding steps, screening and centrifugation, and when carrying out each road grinding step, also add dispersant respectively, and in the end add china clay during one grinding step and together grind; Wherein, used powdered whiting, dispersant Sodium Polyacrylate and china clay weight part ratio are 720～850 parts of powdered whitings, 14～18 parts of dispersant Sodium Polyacrylates, 180～300 parts of china clay.
2, the slurry type heavy calcium carbonate method of preparation added porcelain clay for making paper as claimed in claim 1 is characterized in that: after powdered whiting is sized mixing former slip is carried out raw material buffering operation, and after screening the finished product slurry is carried out finished product buffering operation.
3, the slurry type heavy calcium carbonate method of preparation added porcelain clay for making paper as claimed in claim 2 is characterized in that: raw material buffering operation and finished product buffering operation are under stirring condition carries out.
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| CNB2007100136779A CN100535242C (en) | 2007-03-09 | 2007-03-09 | Slurry type heavy calcium carbonate of added porcelain clay for making paper and its preparing method |
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| CNB2007100136779A CN100535242C (en) | 2007-03-09 | 2007-03-09 | Slurry type heavy calcium carbonate of added porcelain clay for making paper and its preparing method |
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| CN100535242C true CN100535242C (en) | 2009-09-02 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102304871B (en) * | 2011-06-30 | 2012-12-26 | 湖南磊鑫新材料科技有限公司 | Production method for coating pigments on white board |
| CN102864681B (en) * | 2012-09-30 | 2014-10-08 | 湖南磊鑫新材料科技有限公司 | Method for preparing superfine coarse whiting size with general calcite mineral powder |
| CN102950055B (en) * | 2012-10-19 | 2016-01-13 | 宁波市联成机械有限责任公司 | Calcium carbonate slurry wet grinding manufacture method |
| CN103525130A (en) * | 2013-10-16 | 2014-01-22 | 上海东升新材料有限公司 | Preparation method of heavy calcium carbonate with narrow particle size |
| CN103721826A (en) * | 2013-12-31 | 2014-04-16 | 上海东升新材料有限公司 | Preparation method of heavy calcium carbonate with narrow particle size |
| CN103740137A (en) * | 2013-12-31 | 2014-04-23 | 上海东升新材料有限公司 | Preparation method of heavy calcium carbonate with narrow particle size |
| CN104858031A (en) * | 2015-06-03 | 2015-08-26 | 安徽省铜陵县牛山矿业有限责任公司 | Preparation device of mineral coating substrates |
| CN112358742A (en) * | 2020-11-10 | 2021-02-12 | 济宁明升新材料有限公司 | 99-grade heavy calcium carbonate and preparation method thereof |
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Assignee: Shouguang Cailun Zhongke Fertiliser Co., Ltd. Assignor: Cailun Shenxing Refine Chemical Co., Ltd., Shouguang Contract fulfillment period: 2009.9.16 to 2015.9.16 contract change Contract record no.: 2009370000349 Denomination of invention: Slurry type heavy calcium carbonate of added porcelain clay for making paper and its preparing method Granted publication date: 20090902 License type: Exclusive license Record date: 2009.9.28 |
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