A recycled fly ash glass bead wear-resistant fiber composite waste paper pulp packaging paper and a preparation method thereof

Abstract

The application discloses a kind of regenerated fly ash glass microsphere wear-resistant fiber composite waste paper pulp packaging paper and preparation method thereof, related to solid waste resource and papermaking technical field, by weight fraction, raw material includes air separation super first modified glass microsphere wear-resistant fiber 12-28 portion, recycled old paper shell paper pulp 72-88 portion, environmental protection composite additive 0.5-3 portion;By fly ash microsphere air separation purification, surface modification, with recycled waste paper pulp compound refiner, low-temperature is formed by being copied, and high-performance packaging reel paper is prepared.The application realizes the double efficient recycling of fly ash industrial solid waste and waste paper shell, improves the wear resistance and compression resistance of packaging paper, reduces resource consumption and carbon emission, has low production cost, adapts to existing papermaking production line, has high industrialization value, effectively promotes ecological environmental protection low carbon and circular economy development, solves the technical problems of poor performance of traditional recycled paper packaging paper, insufficient solid waste utilization and low environmental protection benefit.

Description

Technical Field

[0001] This invention belongs to the fields of solid waste resource utilization technology and paper production technology, specifically relating to a recycled fly ash glass microsphere wear-resistant fiber composite waste paper pulp packaging paper and its preparation method. Background Technology

[0002] Fly ash is a major industrial solid waste emitted by coal-fired power plants. Glass microspheres extracted from ultra-high-grade fly ash by air separation have excellent properties such as uniform particle size, high hardness, good chemical stability, wear resistance, pressure resistance, light weight, and hollow structure. They are inorganic functional fillers with great potential for high-value utilization. At present, fly ash glass microspheres are limited to low-end applications in building materials, plastics, rubber and other fields. The resource utilization of fly ash in the paper industry has not yet formed a mature and large-scale application system. Existing technologies have technical bottlenecks such as poor bonding force between microspheres and plant fibers, uneven dispersion, easy sedimentation, and paper strength not meeting standards, which make it impossible to achieve efficient composite utilization of recycled pulp and fly ash microspheres.

[0003] Meanwhile, the global pressure to dispose of industrial solid waste and the paper industry's demand for low-carbon emission reduction are becoming increasingly urgent. Developing a packaging paper production technology that uses recycled fly ash glass microsphere wear-resistant fibers to replace part of the recycled paperboard pulping process, thereby achieving dual recycling of industrial solid waste and waste paper resources, and solving the problems of poor performance, high resource consumption, and low environmental benefits of existing recycled paper packaging paper, is a technical problem that urgently needs to be solved in the current paper and solid waste resource utilization field. Summary of the Invention

[0004] The purpose of this invention is to provide a recycled fly ash glass microsphere wear-resistant fiber composite waste paper pulp packaging paper and its preparation method, so as to solve the problems of performance defects of existing recycled paperboard packaging paper, insufficient high-value utilization of fly ash solid waste, and large resource consumption and carbon emissions in the papermaking industry.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A composite waste paper packaging paper made from recycled fly ash glass microspheres and wear-resistant fibers, by weight, comprises the following raw material components: 12-28 parts of air-classified super-grade fly ash modified glass microspheres and wear-resistant fibers, 72-88 parts of recycled waste paper pulp, and 0.5-3 parts of environmentally friendly composite additives; wherein the air-classified super-grade fly ash glass microspheres have a particle size of 5-25μm, a purity ≥95%, a Mohs hardness ≥6, and are surface-coupled modified; the recycled waste paper pulp is recycled pulp obtained by crushing waste corrugated cardboard boxes and waste roll packaging paper.

[0006] Furthermore, the environmentally friendly composite additive is composed of silane coupling agent, plant fiber reinforcing agent, and retention and filtration aid in a mass ratio of 1:2:1. The silane coupling agent is selected from KH-550 or KH-570, the plant fiber reinforcing agent is a starch-based reinforcing agent, and the retention and filtration aid is a polyacrylamide-based environmentally friendly additive.

[0007] The specific steps for preparing the above-mentioned recycled fly ash glass microsphere abrasion-resistant fiber composite waste paper pulp packaging paper are as follows: S1: Air classification and purification of fly ash glass microspheres: The ultra-high grade fly ash emitted from coal-fired power plants is sent to a multi-stage air classification and grading equipment. Through wind speed control and electrostatic classification coupling process, impurities, residual carbon and coarse particles in the fly ash are removed, and high-purity glass microspheres with a particle size of 5-25μm and a purity of ≥95% are extracted and dried for later use. S2: Microsphere wear-resistant fiber modification treatment: The purified glass microspheres are added to the modification reaction vessel, heated to 60-80℃, and 1-3% of the mass of the microspheres of silane coupling agent are added. The mixture is kept warm and stirred for 30-60 minutes to carry out surface activation modification, improve the interfacial bonding force between the microspheres and plant fibers, and obtain fly ash glass microsphere wear-resistant fiber. S3: Preparation of recycled waste paper pulp: The recycled waste paper is sorted, impurities are removed, and it is crushed and sent to a hydraulic pulper for pulping. After screening, sand removal and concentration, recycled waste paper pulp with a concentration of 8-12% is obtained. S4: Composite pulp preparation: Add modified glass microsphere abrasion-resistant fiber and environmentally friendly composite additives to recycled waste paper pulp according to the formula, send it into a low-consistency refiner, and refine and disperse it at 40-50℃ for 20-40 minutes to make the microsphere abrasion-resistant fiber evenly dispersed in the pulp to form a uniform and stable composite pulp. S5: Paper forming: The composite pulp is fed into the wire section of the paper machine, and after dewatering, pressing and low-temperature drying, the drying temperature is controlled at 80-100℃. After winding and slitting, recycled fly ash glass microsphere wear-resistant fiber composite waste paper pulp packaging roll paper is obtained.

[0008] Compared with the prior art, the beneficial effects of the present invention are: High-value recycling of solid waste: This invention enables the large-scale high-value application of air-separated super-grade fly ash glass microspheres in the papermaking industry, transforming industrial solid waste into functional wear-resistant fibers for papermaking, significantly increasing the added value of fly ash, and consuming a large amount of fly ash solid waste annually, reducing the land occupation and environmental pollution caused by fly ash landfills. At the same time, it maximizes the utilization of recycled old paperboard resources, realizing a dual cycle of industrial solid waste and waste paper resources, and promoting the development of a comprehensive and efficient recycling industry.

[0009] Significantly improved paper performance: Through the reinforcing effect of modified glass microsphere abrasion-resistant fibers, the abrasion resistance of the resulting packaging roll paper is improved by more than 40%. The ring crush strength, bursting index, and tear strength are all superior to those of traditional recycled paper packaging paper. It effectively solves the problems of easy wear, low strength, and easy breakage of recycled pulp packaging paper, making it suitable for heavy-duty packaging and long-distance logistics packaging scenarios, and extending the service life of packaging paper.

[0010] Outstanding environmental and low-carbon benefits: This invention does not require the addition of large amounts of virgin wood pulp, reducing deforestation and lowering wood consumption in the paper industry; the entire production process uses environmentally friendly additives, with no toxic or harmful substances emitted, and each ton of packaging paper can reduce carbon dioxide emissions by 0.7-1.0 tons, which aligns with ecological and environmental protection and low-carbon emission reduction policies and helps achieve dual carbon goals.

[0011] Reduced production costs and strong adaptability: Fly ash glass microspheres have low raw material costs and simple preparation processes, and can be directly adapted to existing paper production lines without large-scale equipment modifications. The production cost per ton of packaging paper is reduced by 150-250 yuan. The produced roll paper can be widely used in various packaging boxes and logistics packaging, with broad market application prospects and strong industrialization promotion value.

[0012] Promoting technological upgrading in the industry: Breaking through the limitations of traditional papermaking raw materials, pioneering a new path for papermaking that couples industrial solid waste with waste paper recycling, providing technical support for the green transformation of the papermaking industry and the resource utilization of solid waste, effectively promoting the coordinated development of the papermaking industry and the environmental protection industry, and contributing to the progress of ecological environmental protection and low-carbon initiatives. Attached Figure Description

[0013] Figure 1 This is a flowchart of the preparation process of the present invention. Detailed Implementation

[0014] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are only preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified. Example 1

[0015] 1. Air classification and purification of glass microspheres from fly ash: Take super grade I fly ash, and after multi-stage air classification and electrostatic grading, extract glass microspheres with a particle size of 5-20μm and a purity of 96%, and dry them for later use; 2. Microsphere modification treatment: Glass microspheres are added to a reaction vessel, heated to 70°C, and KH-550 silane coupling agent accounting for 2% of the mass of the microspheres is added. The mixture is kept warm and stirred for 40 minutes to obtain modified wear-resistant fibers. 3. Recycled pulp preparation: Waste corrugated cardboard boxes are sorted, pulped, and screened to obtain recycled pulp with a concentration of 10%. 4. Composite pulping: Take 20 parts by weight of modified glass microsphere abrasion-resistant fiber, 80 parts of recycled pulp, and 1.5 parts of environmentally friendly composite additives, mix them, and then grind and disperse them at 45℃ for 30 minutes. 5. Paper forming: After dehydration, pressing, and drying at a low temperature of 90℃, packaging roll paper is obtained.

[0016] Performance testing: The paper's abrasion resistance is improved by 45%, the bursting strength index is 3.0 kPa・m² / g, the ring crush strength is 8.5 kN / m, and 0.2 tons of fly ash microspheres are disposed of per ton of paper, reducing CO2 emissions by 0.85 tons. Example 2

[0017] 1. Air separation and purification of fly ash glass microspheres: Extract glass microspheres with a particle size of 10-25μm and a purity of 95.5%, and dry them for later use; 2. Microbead modification treatment: Heat to 75℃, add 2.5% KH-570 silane coupling agent, and stir for 50 min; 3. Recycled pulp preparation: 9% concentration recycled pulp is obtained from waste roll packaging paper; 4. Composite pulping: Take 25 parts of modified microbead fiber, 75 parts of recycled pulp, and 2 parts of environmentally friendly composite additives, mix and refine for 35 minutes; 5. Paper forming: Dry at a low temperature of 95℃ to obtain packaging roll paper.

[0018] Performance testing: The paper's abrasion resistance is improved by 42%, its bursting strength index is 2.9 kPa・m² / g, and its ring crush strength is 8.3 kN / m, meeting the national standards for packaging paper and suitable for large-scale production.

[0019] Patent-to-Productivity Implementation Plan I. Steps for the Industrialization of Technology Pilot-scale verification stage: Build a pilot production line with a daily output of 500kg, optimize raw material ratio and process parameters, complete product performance testing and environmental protection testing, and generate a standardized pilot-scale report; Production line upgrade phase: Collaborate with existing packaging paper manufacturers to add a fly ash microsphere purification, modification, and dispersion system to the existing papermaking equipment. The upgrade requires a small investment and a short construction period, and can achieve full production capacity in 3 months. Product Certification and Standards Development: Completed product quality certification for packaging paper and solid waste comprehensive utilization certification; jointly developed the group standard "Fly Ash Microsphere Composite Recycled Packaging Paper" with industry associations to enhance the industry's voice; Large-scale production and promotion: Gradually expand the scale of production lines, provide technology authorization, equipment matching and raw material supply to packaging paper production enterprises nationwide, and realize industrialization promotion throughout the country.

[0020] II. Market and Business Model Target markets: logistics packaging companies, cardboard box manufacturers, e-commerce packaging companies, food packaging companies, and industrial heavy packaging companies; Profit model: Sales of fly ash modified glass microspheres and wear-resistant fibers, papermaking technology licensing services, production line management and operation, and production and sales of composite packaging paper products; Policy Alignment: Apply for national special subsidies for circular economy, comprehensive utilization of solid waste, green manufacturing, and low-carbon environmental protection, and enjoy tax reductions and exemptions for comprehensive resource utilization and support from special environmental protection funds.

[0021] III. Ecological and Environmental Protection and Social Value Solid waste disposal: An annual production of 100,000 tons of composite packaging paper can dispose of 12,000 to 28,000 tons of fly ash glass microspheres, reducing the land occupied by fly ash landfills and lowering environmental pollution; Resource protection: Reduce the consumption of virgin wood pulp by more than 20,000 tons per year, protect forest resources, and contribute to the construction of ecological civilization; Low-carbon emission reduction: Reduce carbon dioxide emissions by 7,000-10,000 tons per year, promote the low-carbon transformation of the paper industry, and contribute core strength to ecological and environmental protection and the achievement of dual-carbon goals; Industrial impact: Promote the resource utilization of solid waste and the green upgrading of the paper industry, create jobs, promote the development of the circular economy industrial chain, and achieve a win-win situation for economic, environmental and social benefits.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A type of recycled fly ash glass microsphere abrasion-resistant fiber composite waste paper pulp packaging paper, characterized in that, By weight, the raw material components include: 12-28 parts of air-classified super-grade fly ash modified glass microspheres and wear-resistant fibers, 72-88 parts of recycled old paperboard pulp, and 0.5-3 parts of environmentally friendly composite additives; the air-classified super-grade fly ash glass microspheres have a particle size of 5-25μm, a purity ≥95%, a Mohs hardness ≥6, and are surface-modified with a silane coupling agent; the environmentally friendly composite additives are compounded from a silane coupling agent, a plant fiber reinforcing agent, and a retention and filtration aid in a mass ratio of 1:2:

1.

2. The recycled fly ash glass microsphere abrasion-resistant fiber composite waste paper pulp packaging paper according to claim 1, characterized in that, The silane coupling agent is selected from KH-550 or KH-570, the plant fiber reinforcing agent is a starch-based reinforcing agent, and the retention and filtration aid is a polyacrylamide-based environmentally friendly additive.

3. The method for preparing a recycled fly ash glass microsphere abrasion-resistant fiber composite waste paper pulp packaging paper according to any one of claims 1-2, characterized in that, The specific steps are as follows: S1. Air classification and purification of fly ash glass microspheres: Super grade I fly ash is subjected to multi-stage air classification and electrostatic classification coupling to extract high-purity glass microspheres with a size of 5-25μm and a purity of ≥95%, which are then dried for later use. S2. Modification of wear-resistant glass microspheres: Glass microspheres are added to a reaction vessel, heated to 60-80℃, and 1-3% of silane coupling agent by mass of microspheres is added. The mixture is kept warm and stirred for 30-60 minutes to obtain modified glass microsphere wear-resistant fibers. S3. Preparation of recycled waste paper pulp: The recycled waste paper is sorted, impurities are removed, pulped, screened and concentrated to obtain recycled waste paper pulp with a concentration of 8-12%. S4. Preparation of composite pulp: Add modified glass microspheres, wear-resistant fibers, and environmentally friendly composite additives to recycled waste paper pulp according to the formula, and grind and disperse at 40-50℃ for 20-40 minutes to obtain composite pulp; S5. Paper forming: The composite pulp is dewatered, pressed, dried at a low temperature of 80-100℃, and wound and cut to obtain composite waste paper pulp packaging rolls.

4. The preparation method according to claim 3, characterized in that, After processing by the multi-stage air classification equipment in step S1, the purity of the glass microspheres is ≥95%, and the particle size is concentrated in 5-25μm.

5. The preparation method according to claim 3, characterized in that, The resulting packaging roll paper exhibits improved abrasion resistance by ≥40%, a bursting strength index of ≥2.8 kPa・m² / g, and a ring crush strength of ≥8 kN / m.

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