CN115818655A - Flaky talcum powder, preparation method thereof and application of flaky talcum powder in preparation of laminating base paper - Google Patents
Flaky talcum powder, preparation method thereof and application of flaky talcum powder in preparation of laminating base paper Download PDFInfo
- Publication number
- CN115818655A CN115818655A CN202211366755.4A CN202211366755A CN115818655A CN 115818655 A CN115818655 A CN 115818655A CN 202211366755 A CN202211366755 A CN 202211366755A CN 115818655 A CN115818655 A CN 115818655A
- Authority
- CN
- China
- Prior art keywords
- talcum powder
- powder
- flaky
- preparation
- flotation
- 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.)
- Granted
Links
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 238000010030 laminating Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 238000005188 flotation Methods 0.000 claims abstract description 42
- 239000003112 inhibitor Substances 0.000 claims abstract description 40
- 229920002472 Starch Polymers 0.000 claims abstract description 37
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 239000008107 starch Substances 0.000 claims abstract description 37
- 235000019698 starch Nutrition 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 36
- 125000002091 cationic group Chemical group 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 239000004088 foaming agent Substances 0.000 claims abstract description 18
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000014483 powder concentrate Nutrition 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 19
- 239000000454 talc Substances 0.000 claims description 19
- 229910052623 talc Inorganic materials 0.000 claims description 19
- 235000012222 talc Nutrition 0.000 claims description 19
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 15
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 8
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 7
- 150000001408 amides Chemical class 0.000 claims description 7
- 239000003350 kerosene Substances 0.000 claims description 7
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 6
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 5
- BMVXCPBXGZKUPN-UHFFFAOYSA-N 1-hexanamine Chemical compound CCCCCCN BMVXCPBXGZKUPN-UHFFFAOYSA-N 0.000 claims description 4
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims description 3
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229940116411 terpineol Drugs 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 abstract description 14
- 239000000835 fiber Substances 0.000 abstract description 9
- 230000014759 maintenance of location Effects 0.000 abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000012764 mineral filler Substances 0.000 abstract description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 230000005587 bubbling Effects 0.000 description 11
- 238000003756 stirring Methods 0.000 description 11
- 239000004575 stone Substances 0.000 description 10
- 235000008504 concentrate Nutrition 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000004537 pulping Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 6
- 238000006266 etherification reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 125000001453 quaternary ammonium group Chemical group 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000010009 beating Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- -1 tertiary amino alkyl ether Chemical class 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 235000008446 instant noodles Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Paper (AREA)
Abstract
The invention provides flaky talcum powder, a preparation method thereof and application of the flaky talcum powder in preparation of laminating base paper, and relates to the technical field of preparation of inorganic mineral fillers. Crushing raw talcum powder, ball milling, mixing the obtained talcum powder with a first capturing agent, grinding by using an air flow mill, and separating fine talcum powder; mixing the talcum powder fine powder with water, and performing first flotation on the obtained first slurry under the action of a second capturing agent and a foaming agent; mixing the obtained talcum powder foam with water, and carrying out second flotation on the obtained second slurry under the action of an inhibitor to obtain talcum powder concentrate slurry; the inhibitor comprises cyanide and cationic starch; and concentrating and drying the talc powder concentrate pulp to obtain the flaky talc powder. The flaky talcum powder prepared by the invention has a more complete structure, is modified by cationic starch, has stronger binding capacity with paper fibers, and can be used for producing the laminating base paper to obviously improve the barrier property, smoothness and retention rate of the laminating base paper.
Description
Technical Field
The invention relates to the technical field of inorganic mineral filler preparation, in particular to flaky talcum powder, a preparation method thereof and application thereof in preparation of laminating base paper.
Background
The laminated paper is visible everywhere in daily life, is widely applicable to the fields of food packaging, electronics, printing and the like, is different from other paper in that the laminated paper has the functions of moisture prevention, water prevention and oil prevention, and common disposable cups, instant noodle boxes and food bags all belong to the category of the laminated paper. The laminating paper mainly comprises base paper and a laminating layer, wherein the laminating layer is formed by coating hot-melt plastic particles on the surface of the base paper through casting, so that the product has a barrier effect on a liquid phase; the base paper is also called as laminating base paper, the laminating base paper has very high requirements on the production of the laminating base paper, certain dimensional stability must be kept after the laminating base paper absorbs liquid, and the laminating base paper has firm paper-plastic adhesion and good color printing performance of a laminating surface. At present, the barrier effect of the laminating paper mainly depends on the plastic laminating layer on the surface to play a role, and few production enterprises consider the barrier property of the laminating base paper. If the barrier property of the laminating base paper can be improved and the plastic barrier layer on the surface is combined, the liquid barrier property of the whole paper can be improved by one grade.
The selection of raw materials in the production process is an important factor influencing the performance of the laminating base paper, wherein the selection of the filler is particularly important. The production of paper with barrier properties usually employs fillers with lamellar structure, of which talc is the first choice, to increase the path of liquid penetration and thus improve the liquid barrier properties. The talcum powder is a natural mineral with a flaky structure, and compared with granular fillers added into paper, the talcum powder can endow the paper with unique performance and improve the barrier property of the paper to a liquid phase system. The sheet structure of the talcum powder added in the paper rabbet is generally not ideal at present, and the sheet structure is damaged by various processing technologies, so that the talcum powder products with the sheet structures on the market are uneven.
Disclosure of Invention
In view of the above, the present invention aims to provide a flaky talc powder, a preparation method thereof, and an application thereof in preparation of laminating base paper. The preparation method provided by the invention can improve the integrity of the sheet structure of the talcum powder.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of flaky talcum powder, which comprises the following steps:
crushing raw talcum powder and then carrying out ball milling to obtain talcum powder with the particle size of 300-400 meshes;
mixing the talcum powder with a first trapping agent, grinding by using an air flow mill, and separating out a particle size D 97 Pulvis Talci fine powder less than or equal to 30 μm;
mixing the talcum powder fine powder with water, and carrying out first flotation on the obtained first slurry under the action of a second capturing agent and a foaming agent to obtain talcum powder foam;
mixing the talcum powder foam with water, and carrying out second flotation on the obtained second slurry under the action of an inhibitor to obtain talcum powder concentrate slurry; the inhibitor comprises cyanide and cationic starch;
and sequentially concentrating and drying the talc powder concentrate pulp to obtain the flaky talc powder.
Preferably, the content of the talcum powder in the talcum powder raw ore is more than or equal to 70wt%, and the loss on ignition of the talcum powder raw ore is less than or equal to 12wt%.
Preferably, the first capture agent and the second capture agent independently comprise one or more of kerosene, amide and n-hexylamine; the addition amount of the first trapping agent and the second trapping agent is equal, and the mass sum of the first trapping agent and the second trapping agent is 5-12 per mill of the mass of the talcum powder.
Preferably, the foaming agent comprises one or more of methyl isobutyl carbinol, heavy pyridine and terpineol; the mass of the foaming agent is 3-5 per mill of the mass of the talcum powder.
Preferably, the mass concentration of the first slurry and the second slurry is independently 15 to 20%.
Preferably, the first flotation comprises a first primary flotation, a second primary flotation and a scavenging which are sequentially carried out; the total time of the first flotation is 6-8 min.
Preferably, the cyanide in the inhibitor comprises acetonitrile and/or acrylonitrile; the mass ratio of cyanide to cationic starch in the inhibitor is 1.8-1.2; the mass ratio of the inhibitor to the foaming agent is 1.
The invention provides the flaky talcum powder prepared by the preparation method in the technical scheme, and the flaky talcum powder is modified by cationic starch.
The invention provides application of the flaky talcum powder in the technical scheme in preparation of laminating base paper.
Preferably, the addition amount of the flaky talcum powder in the laminating base paper is 10-30 wt%.
The invention provides a preparation method of flaky talcum powder, which comprises the following steps: crushing raw talcum powder and then carrying out ball milling to obtain talcum powder with the particle size of 300-400 meshes; mixing the talcum powder with a first trapping agent, grinding by using an air flow mill, and separating out a particle size D 97 Talcum powder fine powder with a particle size of less than or equal to 30 mu m; mixing the talcum powder fine powder with water, and carrying out first flotation on the obtained first slurry under the action of a second capturing agent and a foaming agent to obtain talcum powder foam; mixing the talcum powder foam with water, and carrying out second flotation on the obtained second slurry under the action of an inhibitor to obtain talcum powder concentrate slurry; the inhibitor comprises cyanide and cationic starch; and sequentially concentrating and drying the refined talcum powder pulp to obtain the flaky talcum powder. According to the invention, the talc powder raw ore is crushed and then subjected to ball milling and jet milling crushing in sequence, wherein the ball milling can ensure the yield, and the jet milling crushing can reduce the damage to the flaky structure of the talc powder; the invention carries out flotation on the talcum powder fine powder, and the flotation mode can ensure that the talcum powder structure is more complete; the invention selects the cationThe starch is used as an inhibitor, not only plays a role of a flotation inhibitor, but also can be used as a surface modifier of the talcum powder, and the combination capability of the talcum powder modified by the cationic starch and paper fiber is stronger. The preparation method provided by the invention can obviously improve the integrity of the sheet structure of the talcum powder, prepare the talcum powder product with high sheet structure content and fill the market blank; and the bonding capability of the talcum powder and the paper fiber is obviously enhanced, and the tensile strength and the folding strength of the paper are improved. The flaky talcum powder prepared by the invention is used for producing the laminating base paper, so that the barrier property and smoothness of the laminating base paper can be obviously improved; and because the invention adopts the production technology of flotation, the flaky talcum powder fine powder after flotation has high content, and the retention rate of the talcum powder in paper can be improved.
Drawings
FIG. 1 is a 40-fold electron microscopic image of the talc powder products prepared in examples 1 to 3 and a comparative example;
FIG. 2 is a 30-fold electron microscope image of the coated base papers prepared in examples 1 to 3 and comparative example.
Detailed Description
The invention provides a preparation method of flaky talcum powder, which comprises the following steps:
crushing raw talcum powder and then carrying out ball milling to obtain talcum powder with the particle size of 300-400 meshes;
mixing the talcum powder with a first trapping agent, grinding by using an air flow mill, and separating out a particle size D 97 Pulvis Talci fine powder less than or equal to 30 μm;
mixing the talcum powder fine powder with water, and carrying out first flotation on the obtained first slurry under the action of a second capturing agent and a foaming agent to obtain talcum powder foam;
mixing the talcum powder foam with water, and carrying out second flotation on the obtained second slurry under the action of an inhibitor to obtain talcum powder concentrate slurry; the inhibitor comprises cyanide and cationic starch;
and sequentially concentrating and drying the talc powder concentrate pulp to obtain the flaky talc powder.
The invention crushes the raw talcum powder and ball-mills the crushed raw talcum powder to obtain the talcum powder with the grain size of 300-400 meshes. In the invention, the content of the talcum powder in the talcum powder raw ore is preferably more than or equal to 70wt%, and more preferably more than or equal to 70wt%; the ignition loss of the talc powder raw ore is preferably less than or equal to 12wt%. The invention preferably crushes the talc powder crude ore after cleaning, and the invention has no special requirement on the cleaning method and can adopt the cleaning method well known by the technicians in the field; the crushing is to crush the cleaned talc powder raw ore into crushed stone blocks with the size of 5-8 cm. The ball milling equipment and method are not particularly required, and the ball milling equipment and the ball milling method which are well known to those skilled in the art can be adopted. The invention adopts a ball milling method to crush the crushed raw talc powder, and can ensure the yield of the talc powder.
After the talcum powder is obtained, the talcum powder and a first trapping agent are mixed and ground by a jet mill, and then the particle size D is separated 97 Talcum powder fine powder with a particle size less than or equal to 30 mu m. In the invention, the first capture agent preferably comprises one or more of kerosene, amide and n-hexylamine, preferably kerosene or amide, and the amide preferably comprises one or more of polyacrylamide, caprolactam and glutamine. In the invention, the concrete operation method for mixing the talcum powder and the first trapping agent is preferably as follows: conveying the talcum powder to an air flow mill through a spiral conveying pipe for air flow milling and crushing, and adding a first capturing agent into the talcum powder in the process of crushing through the air flow mill. After the jet mill is used for crushing, the invention preferably adopts a classifier to separate the product crushed by the jet mill to obtain the particle size D 97 Talcum powder fine powder with a particle size less than or equal to 30 mu m. The invention adopts the airflow grinding process, and compared with other mineral grinding equipment, the damage to the flaky structure of the talcum powder is reduced; the invention adopts ball milling, air flow milling for crushing and particle size separation to obtain the talcum powder fine powder with narrow particle size distribution, which is beneficial to the retention of the talcum powder in paper, improves the smoothness of the paper and reduces the difference of two sides of the paper.
After the talcum powder fine powder is obtained, the talcum powder fine powder is mixed with water, and the obtained first slurry is subjected to first flotation under the action of a second capturing agent and a foaming agent to obtain talcum powder foam. In the present invention, the mass concentration of the first slurry is preferably 15 to 20%, more preferably 15 to 18%. In the invention, the second capture agent preferably comprises one or more of kerosene, amide and n-hexylamine, and the amide preferably comprises one or more of polyacrylamide, caprolactam and glutamine; in embodiments of the invention, the second capture agent is preferably the same as the first collector; the adding amount of the first trapping agent and the second trapping agent is preferably equal, and the mass sum of the first trapping agent and the second trapping agent is preferably 5-12 per thousand of the mass of the talcum powder, and more preferably 7-10 per thousand. In the invention, the first trapping agent and the second trapping agent can be selectively attached to the surface of the talcum powder, so that the hydrophobicity of the talcum powder is enhanced, the talcum powder is easily attached to bubbles to float upwards, and the separation from associated ores is realized; the collecting agent is added in two steps, namely, the first capturing agent is added in the airflow grinding process, and the second capturing agent is added in the first floating process, so that the talcum powder can be more fully combined with the capturing agent. In the present invention, the foaming agent preferably comprises one or more of methyl isobutyl carbinol, heavy pyridine and terpineol, more preferably methyl isobutyl carbinol or heavy pyridine; the mass of the foaming agent is preferably 3-5 per thousand of the mass of the talcum powder, and more preferably 3-4 per thousand. According to the invention, a second capture agent and a foaming agent are preferably added into the first slurry, and the first slurry is conveyed into a flotation tank for first flotation after being subjected to bubbling stirring; the bubbling stirring time is preferably 15-25 min; the first flotation preferably comprises first primary selection, second primary selection and scavenging which are sequentially carried out; the invention has no special requirements on the specific operation of the first primary separation, the second primary separation and the scavenging, and can adopt a primary separation and scavenging method well known by the technical personnel in the field; the total time of the first flotation is preferably 6 to 8min. And obtaining talcum powder foam through the first flotation.
After the talcum powder foam is obtained, the talcum powder foam is mixed with water, and the obtained second slurry is subjected to second flotation under the action of an inhibitor to obtain the talcum powder concentrate pulp. According to the invention, the talcum powder foam is preferably subjected to ultrasonic defoaming and then mixed with water. In the present invention, the mass concentration of the second slurry is preferably 15 to 20%, more preferably 17 to 20%. In the invention, the inhibitor comprises cyanide and cationic starch, wherein the cyanide preferably comprises acetonitrile and/or acrylonitrile, the cationic starch preferably comprises starch tertiary amino alkyl ether and/or quaternary ammonium starch ether, the starch tertiary amino alkyl ether is preferably tertiary ammonium etherification-sulfo-2-hydroxypropyl etherification starch, and the quaternary ammonium starch ether is preferably quaternary ammonium etherification-sulfo-2-hydroxypropyl etherification starch; the mass ratio of cyanide to cationic starch in the inhibitor is preferably 1; the mass ratio of the inhibitor to the blowing agent is preferably 1. In the embodiment of the present invention, the inhibitor is preferably added in the form of an aqueous inhibitor solution, specifically, a mixed aqueous solution obtained by dissolving a cyanide and cationic starch in water, and the concentration of the aqueous inhibitor solution is not particularly required in the present invention, and the cyanide and cationic starch can be sufficiently dissolved. In the present invention, the specific operation of the second flotation is preferably: adding an inhibitor into the second slurry for bubbling stirring, then sweeping out the foam on the upper layer of the liquid surface by using a flotation blade, and remaining talcum powder concentrate slurry; the time for the bubbling stirring is preferably 15 to 25min, and more preferably 15 to 20min. In the second flotation process, the cyanide in the inhibitor separates the talcum powder from the trapping agent, the trapping agent floats on the surface of the slurry in a foam state due to bubbling and stirring, and the cyanide is floated together with the trapping agent; and the cationic starch and the surface of the talcum powder ore particles form a hydrophilic film and simultaneously extrude a part of trapping agent, so that the talcum powder ore concentrate ore particles are left in the ore pulp, namely the cationic starch not only plays the role of a flotation inhibitor, but also serves as a surface modifier of the talcum powder. In the present invention, the collector froth floated by the second flotation is preferably recovered and reused by an oil-water separator.
After the talc powder concentrate pulp is obtained, the talc powder concentrate pulp is sequentially concentrated and dried to obtain the flaky talc powder. In the invention, the concentration is preferably carried out in a concentrator, and the concentration is carried out until the solid content is 60-70%; the drying is preferably carried out in a bulk dryer, the temperature of the drying preferably being 95 to 105 ℃.
The invention provides the flaky talcum powder prepared by the preparation method in the technical scheme, and the flaky talcum powder is modified by cationic starch. The talcum powder provided by the invention has a more complete structure, strong adsorption capacity to resin (paper pulp is used in the papermaking process, and plant fibers in the paper pulp carry the resin), and stronger barrier property; and the talcum powder modified by the cationic starch has stronger binding capacity with paper fibers, thereby improving the tensile strength and the folding strength of the paper.
The invention provides application of the flaky talcum powder in the technical scheme in preparation of laminating base paper. In the present invention, the method of application is preferably: providing laminating base paper pulp; and adding the flaky talcum powder into the laminating base paper pulp, and then carrying out sheet making and forming in a sheet making machine to obtain the laminating base paper. The preparation method of the laminating base paper pulp has no special requirement, and the laminating base paper pulp can be obtained by adopting a method well known by the technical personnel in the field. In the invention, the addition amount of the flaky talcum powder in the laminating base paper is preferably 10-40 wt%, and more preferably 20-25 wt%. When the flaky talcum powder provided by the invention is used for producing the laminating base paper, the barrier property, smoothness and retention rate of the laminating base paper can be obviously improved.
The flaky talcum powder provided by the invention, the preparation method thereof and the application thereof in preparing laminating base paper are described in detail below by referring to the examples, but the flaky talcum powder and the preparation method thereof and the application thereof in preparing laminating base paper are not understood to limit the protection scope of the invention.
Example 1
Selecting raw talc powder ore with the talc powder content of 80wt% and the ignition loss of 11wt%, cleaning, roughly crushing the raw talc powder ore into stone blocks with the size of about 5cm, and grinding 3 tons of stone blocks to 325 meshes of powder material by a ball mill; conveying 325-mesh powder output by the ball mill into an air flow mill through a spiral conveying pipe for crushing, adding 15kg of caprolactam serving as a trapping agent in the crushing process of the air flow mill, and separating D from the crushed powder by a classifier after the crushing of the air flow mill 97 Fine powder of =20 μm;
mixing the fine powder with water to prepare slurry with the mass concentration of 15%, adding 15kg of trapping agent caprolactam and 9kg of foaming agent methyl isobutyl carbinol, carrying out bubbling stirring for 15min, conveying to a flotation tank, and carrying out primary selection twice and scavenging once to float a talcum powder foam product; ultrasonically defoaming a talcum powder foam product, blending into 5 tons of slurry with the mass concentration of 18% by using water again, adding 4.5kg of acrylonitrile inhibitor and 4.5kg of cationic starch inhibitor quaternary ammonium etherification-sulfo-2-hydroxypropyl etherification starch (the acrylonitrile inhibitor and the cationic starch inhibitor are added after being prepared into an aqueous solution), carrying out bubbling stirring for 20min, sweeping out the foam on the upper layer of the liquid surface by using a flotation blade, and remaining talcum powder concentrate slurry; processing the talc concentrate pulp by a thickener and a dryer to obtain talc concentrate powder, namely flaky talc powder.
Soaking 15g of broad-leaved pulp board and 45g of needle-leaved pulp board for 24h, pulping into paper pulp with a beating degree of 40 DEG SR and a mass concentration of 2% by a pulping machine, taking 200g of paper pulp, adding 1g of the flaky talcum powder, and carrying out sheet making and forming in a sheet making machine to obtain the laminating base paper.
Example 2
Selecting raw talc ore with the talc powder content of 85wt% and the ignition loss of 12wt%, cleaning, roughly crushing the raw talc ore into stones with the size of about 5cm, and grinding 3 tons of stones into powder with the size of 325 meshes by a ball mill; conveying 325-mesh powder output by the ball mill into an air flow mill through a spiral conveying pipe for crushing, adding 15kg of catching agent kerosene in the process of crushing by the air flow mill, and separating D from the crushed powder by a classifier after crushing by the air flow mill 97 Fine powder of =18 μm;
mixing the fine powder with water to prepare slurry with the mass concentration of 18%, adding 15kg of trapping agent kerosene and 9kg of foaming agent pyridine, carrying out bubbling stirring for 15min, conveying to a flotation tank, and carrying out primary selection twice and scavenging once to float a talcum powder foam product; ultrasonically defoaming a talcum powder foam product, blending into 5 tons of slurry with the mass concentration of 17% by using water again, adding 4.5kg of acetonitrile inhibitor and 4.5kg of cationic starch inhibitor tertiary ammonium etherification-sulfo-2-hydroxypropyl etherification starch (adding the acrylonitrile inhibitor and the cationic starch inhibitor after preparing into an aqueous solution), carrying out bubbling stirring for 15min, sweeping out the foam on the upper layer of the liquid surface by using a flotation blade, and remaining talcum concentrate slurry; and treating the talc concentrate pulp by a thickener and a dryer to obtain talc concentrate powder, namely flaky talc powder.
Soaking 15g of broad-leaved pulp board and 45g of needle-leaved pulp board for 24h, pulping into paper pulp with a beating degree of 40 DEG SR and a mass concentration of 2% by a pulping machine, taking 200g of paper pulp, adding 1.2g of the flaky talcum powder, and carrying out sheet making and forming in a sheet making machine to obtain the laminating base paper.
Example 3
Selecting raw talc powder ore with the talc powder content of 82wt% and the ignition loss of 11.5wt%, cleaning, roughly crushing the raw talc powder ore into stone blocks with the size of about 5cm, and grinding 3 tons of stone blocks into powder of 325 meshes by a ball mill; conveying the 325-mesh powder output by the ball mill into an air flow mill through a spiral conveying pipe for crushing, adding 17kg of capture agent polyacrylamide into the air flow mill in the crushing process, and separating D from the crushed powder by a classifier through the air flow mill 97 Fine powder of =15 μm;
mixing the fine powder with water to prepare slurry with the mass concentration of 16%, adding 17kg of trapping agent polyacrylamide and 10kg of foaming agent pyridine, carrying out bubbling stirring for 15min, conveying to a flotation tank, and carrying out primary flotation twice and scavenging once to float a talcum powder foam product; ultrasonically defoaming a talcum powder foam product, blending into 5 tons of slurry with the mass concentration of 20% by using water again, adding 5kg of acetonitrile inhibitor and 5kg of cationic starch inhibitor quaternary ammonium etherification-sulfo-2-hydroxypropyl etherification starch (the acrylonitrile inhibitor and the cationic starch inhibitor are added after being prepared into an aqueous solution), carrying out bubbling stirring for 25min, sweeping out the foam on the upper layer of the liquid surface by using a flotation blade, and remaining talcum concentrate slurry; processing the talc concentrate pulp by a thickener and a dryer to obtain talc concentrate powder, namely flaky talc powder.
Soaking 15g of broad-leaved pulp board and 45g of needle-leaved pulp board for 24h, pulping into paper pulp with a beating degree of 40 DEG SR and a mass concentration of 2% by a pulping machine, taking 200g of paper pulp, adding 1g of the flaky talcum powder, and carrying out sheet making and forming in a sheet making machine to obtain the laminating base paper.
Comparative example
Selecting the content of talcum powder82 percent of talcum powder raw ore with the ignition loss of 11.5 weight percent, coarse crushing the cleaned talcum powder raw ore into stone blocks with the size of about 5cm, grinding 3 tons of stone blocks by a ball mill, and classifying the stone blocks into D 97 Fine powder of talc powder of =15 μm.
Soaking 15g of broad-leaved pulp board and 45g of needle-leaved pulp board for 24h, pulping into paper pulp with a beating degree of 40 DEG SR and a mass concentration of 2% by a pulping machine, taking 200g of paper pulp, adding 1g of talcum powder fine powder, and carrying out sheet making and forming in a sheet making machine to obtain laminating base paper.
FIG. 1 is a 40-fold electron microscopic photograph of the talc powder products prepared in examples 1 to 3 and comparative example. As can be seen from fig. 1, the sheet structure of the talc products prepared in examples 1 to 3 was significantly improved as compared with the comparative example.
Fig. 2 is a 30-fold electron microscope image of the coated base papers prepared in examples 1 to 3 and comparative example, which can reflect the bonding condition of talc powder and pulp fiber. As can be seen from FIG. 2, in examples 1 to 3, the binding ability of talc to pulp fibers was significantly enhanced and the talc adsorbed around the fibers was denser as compared with the comparative example.
Table 1 shows the results of the measurements of the relevant indexes of the papers made by the papers of examples 1 to 3 and the comparative example with talc powder added, i.e. the coated base papers.
Table 1 examples 1 to 3 and comparative example the results of testing the indexes of paper made by adding talc powder filler
| Detecting the index | Comparative example | Example 1 | Example 2 | Example 3 | Detection standard |
| Whiteness (%) | 82.2 | 83.3 | 83.4 | 84.1 | GB/T7974 |
| Smoothness/s | 326 | 365 | 372 | 369 | GB/T456-2002 |
| Folding endurance | 285 | 283 | 286 | 287 | GB/T457-2008 |
| Retention (%) | 27 | 33 | 32 | 33 | GB/T742-2008 |
| Water penetration resistance/s | 38 | 49 | 48 | 48 | GB/T18402-2001 |
As can be seen from Table 1, compared with the paper performance data of the comparative example, the smoothness and water permeability resistance of the paper are obviously improved compared with the comparative example because the sheet structure of the talc product in examples 1 to 3 is more complete, and the whiteness, folding resistance and retention rate of the paper are also obviously improved.
The embodiment shows that the talcum powder prepared by the invention has a more complete structure, the combination capability of the talcum powder modified by cationic starch and paper fiber is stronger, and the sheet talcum powder prepared by the invention can be used for producing the laminating base paper, so that the barrier property, smoothness and retention rate of the laminating base paper can be obviously improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of flaky talcum powder is characterized by comprising the following steps:
crushing raw talcum powder and then carrying out ball milling to obtain talcum powder with the particle size of 300-400 meshes;
mixing the talcum powder with a first trapping agent, grinding by using an air flow mill, and separating out a particle size D 97 Talcum powder fine powder with a particle size of less than or equal to 30 mu m;
mixing the talcum powder fine powder with water, and carrying out first flotation on the obtained first slurry under the action of a second capturing agent and a foaming agent to obtain talcum powder foam;
mixing the talcum powder foam with water, and carrying out second flotation on the obtained second slurry under the action of an inhibitor to obtain talcum powder concentrate slurry; the inhibitor comprises cyanide and cationic starch;
and sequentially concentrating and drying the talc powder concentrate pulp to obtain the flaky talc powder.
2. The preparation method according to claim 1, wherein the content of the talc powder in the raw talc ore is not less than 70wt%, and the loss on ignition of the raw talc ore is not more than 12wt%.
3. The preparation method of claim 1, wherein the first capture agent and the second capture agent independently comprise one or more of kerosene, amide and n-hexylamine; the addition amount of the first trapping agent is equal to that of the second trapping agent, and the mass sum of the first trapping agent and the second trapping agent is 5-12 per mill of the mass of the talcum powder.
4. The method of claim 1, wherein the foaming agent comprises one or more of methyl isobutyl carbinol, heavy pyridine and terpineol; the mass of the foaming agent is 3-5 per mill of the mass of the talcum powder.
5. The method according to claim 1, wherein the mass concentration of the first slurry and the second slurry is independently 15 to 20%.
6. The preparation method according to claim 1, wherein the first flotation comprises a first primary flotation, a second primary flotation and a scavenging which are performed in sequence; the total time of the first flotation is 6-8 min.
7. The method according to claim 1 or 4, wherein the cyanide in the inhibitor comprises acetonitrile and/or acrylonitrile; the mass ratio of cyanide to cationic starch in the inhibitor is 1.8-1.2; the mass ratio of the inhibitor to the foaming agent is 1.
8. The flaky talcum powder prepared by the preparation method of any one of claims 1 to 7, which is modified by cationic starch.
9. Use of the flaky talc of claim 8 in the preparation of laminating base paper.
10. The use of claim 9, wherein the flaky talcum powder is added into the laminating base paper in an amount of 10-30 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211366755.4A CN115818655B (en) | 2022-11-01 | 2022-11-01 | Flaky talcum powder and preparation method thereof and application of flaky talcum powder in preparation of laminating base paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211366755.4A CN115818655B (en) | 2022-11-01 | 2022-11-01 | Flaky talcum powder and preparation method thereof and application of flaky talcum powder in preparation of laminating base paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115818655A true CN115818655A (en) | 2023-03-21 |
| CN115818655B CN115818655B (en) | 2024-03-26 |
Family
ID=85526330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211366755.4A Active CN115818655B (en) | 2022-11-01 | 2022-11-01 | Flaky talcum powder and preparation method thereof and application of flaky talcum powder in preparation of laminating base paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115818655B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961194A (en) * | 1959-09-18 | 1964-06-17 | Johnson & Johnson | Talc beneficiation |
| CN1309737A (en) * | 1998-07-17 | 2001-08-22 | 施托克豪森公司 | Use of modified starch products as retention agents in production of paper |
| WO2021160860A1 (en) * | 2020-02-14 | 2021-08-19 | Solvay Sa | New frothers for minerals recovery |
| CN115073811A (en) * | 2022-07-11 | 2022-09-20 | 辽宁艾海滑石有限公司 | Preparation method of talcum powder special for polypropylene nucleating agent |
-
2022
- 2022-11-01 CN CN202211366755.4A patent/CN115818655B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961194A (en) * | 1959-09-18 | 1964-06-17 | Johnson & Johnson | Talc beneficiation |
| CN1309737A (en) * | 1998-07-17 | 2001-08-22 | 施托克豪森公司 | Use of modified starch products as retention agents in production of paper |
| WO2021160860A1 (en) * | 2020-02-14 | 2021-08-19 | Solvay Sa | New frothers for minerals recovery |
| CN115073811A (en) * | 2022-07-11 | 2022-09-20 | 辽宁艾海滑石有限公司 | Preparation method of talcum powder special for polypropylene nucleating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115818655B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017254943B2 (en) | Depressants for mineral ore flotation | |
| CN105648826B (en) | Low-weight corrugated paper and preparation method thereof | |
| CN105780564A (en) | Technology for producing high-strength cardboard paper from waste carton boxes | |
| CN109641218B (en) | Sulfonated modifiers for froth flotation | |
| CN104690804A (en) | Manufacturing method for fiberboard with electromagnetic shielding function | |
| CN105880007B (en) | A kind of separation method of tennantite and galena | |
| CN108864765A (en) | A kind of preparation method preparing silicon powder using common quartz mineral raw material | |
| AP989A (en) | Process for the recovery of cobalt from ores containing metal sulfides. | |
| CN106269212A (en) | A kind of magnetic separation grading system is for the method for extraction of superpure concentrate of magnetite | |
| CN104785360B (en) | The dense medium separation method of coarse fraction apatite is reclaimed in a kind of mine tailing from magnetic iron ore | |
| CN115818655B (en) | Flaky talcum powder and preparation method thereof and application of flaky talcum powder in preparation of laminating base paper | |
| CN104128244A (en) | Method for recycling iron ore concentrate from iron tailings and obtained iron ore concentrate | |
| US20040065419A1 (en) | Removal of contaminants from recycled paper fibers | |
| EP1370362B1 (en) | Ph adjustment in the flotation of sulphide minerals | |
| US4227996A (en) | Flotation process for improving recovery of phosphates from ores | |
| CN107335531A (en) | A kind of method of separation by shaking table phosphorus ore | |
| CN111135956B (en) | Method for protecting scale in graphite processing | |
| CN111549566A (en) | Recycling method of mica paper waste | |
| US11447914B2 (en) | Removal of stickies in the recycling of paper and paperboard | |
| KR102099338B1 (en) | Calcium carbonate for particle board | |
| CN109967223A (en) | Apatite mine drop is miscellaneous to select phosphorus technique | |
| JPH03146781A (en) | Method for treating waste paper | |
| CA3188495A1 (en) | Method for flotation of a silicate-containing iron ore | |
| Hirsch et al. | Separation of fibre fines and inorganic fines in recovered paper suspensions | |
| AU2002233051B2 (en) | PH adjustment in the flotation of sulphide minerals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |