A cement blanket and its preparation device and production process
By designing a cement blanket preparation device containing multiple functional units, the problems of crack resistance, poor permeability, dust scattering and needle residue in the production process are solved, and the efficient, uniform production and excellent mechanical properties of cement blankets are achieved.
Patent Information
- Application Number
- CN202411991371.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-04
AI Technical Summary
During the production process, existing cement blankets have problems such as poor crack resistance, poor permeability, poor mortar mixing uniformity, poor thickness uniformity, diverse width and specifications, large dust scattering and many residual needles.
A cement blanket preparation device is designed, including a sand making unit, a material storage unit, a mixing unit, an assembly unit, a consolidation unit and a slicing roll unit. Through the installation of horizontal spreader, dustproof cover, cutting baffle, scraper baffle, slitting knife and needle breaking adsorption device, uniform distribution of mortar, effective prevention of dust and adsorption of needle breaking are achieved.
The cement blanket has good crack resistance, seepage resistance, uniform thickness, and supports production of multiple widths and multiple sizes, reducing dust pollution and needle breakage residues, improving production efficiency and product mechanical properties.
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Figure CN119748654A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a cement blanket and a preparation device and production process thereof, belonging to the technical field of cement blankets. Background Art
[0002] Cement blanket is a new, environmentally friendly engineering material with broad application prospects and potential. Its key features, including versatility, ease of transport, flexible tailoring, rapid curing, and cost-effectiveness, have led to its application in a wide range of engineering fields. However, issues such as poor crack resistance, impermeability, poor mortar mixing uniformity, poor thickness uniformity, diverse widths and specifications, high cement dust emissions during on-site production, and significant residual broken needles pose significant challenges to cement blanket production equipment and processes.
[0003] In summary, it is a very important topic to develop a cement blanket production equipment and production process with good crack resistance, good impermeability, uniform mortar mixing, uniform thickness, multi-width production, no cement powder flying during the production process, and no broken needle residue. Summary of the Invention
[0004] In order to solve the above problems, the present application proposes a cement blanket and its preparation device and production process. Through the setting of the device and the specific process, the obtained cement blanket has good crack resistance and impermeability, uniform thickness, and can realize the production of cement blankets of multiple widths and sizes with high production efficiency.
[0005] According to one aspect of the present application, a cement blanket preparation device is provided, characterized in that it includes a sand making unit, a material storage unit, a mixing unit, an assembly unit, a consolidation unit, and a slitting unit connected in sequence;
[0006] The assembly unit includes a horizontal spreader and a material receiving platform located below the horizontal spreader. The horizontal spreader includes a mixing barrel, a discharge baffle and a discharge barrel arranged from top to bottom. The top of the mixing barrel is opened to receive the mixed material conveyed by the mixing unit; the discharge baffle is arranged between the mixing barrel and the discharge barrel, and a plurality of grids are provided on the discharge baffle; the rear end of the discharge barrel is in close contact with the material receiving platform; the front end of the discharge barrel is provided with a scraper baffle, and a plurality of baffle plates are provided on the scraper baffle, and the lower end of the baffle plate is in close contact with the material receiving platform;
[0007] A dust cover is arranged above the mixing barrel.
[0008] Specifically, the sand making unit includes a sand making machine, a sand and gravel separator, a multi-stage screening machine and several sand bins, which are used to make sand from ore and screen and grade it, and store it in different bins. The ore includes one or more of river pebbles, basalt, granite, limestone, bluestone, iron ore, sandstone, quartz sandstone, tailings, slag and construction waste.
[0009] The storage unit includes several silos for storing different raw materials for preparing cement blanket, including cement, fly ash, nano powder, fine sand, volcanic rock particles, cellulose ether, modified engineering fiber, LiSO4, expansion agent and waterproofing agent;
[0010] The mixing unit includes several weighing and metering devices and a multi-stage mixer, which are respectively used for weighing and mixing the materials in each silo;
[0011] The consolidation unit is used for consolidating the lining layer and cement mortar to form a tightly combined whole.
[0012] Optionally, the slitting and rolling unit includes a slitting device, a cross-cutting device and a rolling machine, and the slitting device includes a plurality of slitting knives, which are arranged above the material receiving table and the slitting knives are arranged in parallel along the vertical direction of the material advance.
[0013] Optionally, the slitting knife and the baffle plate are co-located and have the same number.
[0014] The baffle plate forms several blank areas on the cement blanket after solidification, and the slitting knife cooperates with the baffle plate to perform slitting in the blank areas, which can improve production efficiency.
[0015] Optionally, the cross-cutting device includes a cross-cutting knife and a gusset plate, the cross-cutting knife is arranged on the lower side of the material receiving platform, and the gusset plate is arranged on the upper side of the material receiving platform.
[0016] The gusset plate can prevent the mortar dust from flying when the cement blanket is cross-cut.
[0017] Optionally, a broken needle adsorption device is provided between the consolidation unit and the slitting and rolling unit, the broken needle adsorption device is arranged on the upper side of the material receiving table, and an electromagnet is provided at the bottom of the broken needle adsorption device.
[0018] The broken needle adsorption device is used to adsorb broken needles or other metal objects remaining on the cement blanket during the consolidation process, thereby reducing the amount of broken needle residue and making the formed cement blanket have better mechanical properties.
[0019] According to another aspect of the present application, a cement blanket production process is provided, comprising the following steps:
[0020] (1) premixing the following materials by weight: 160 to 500 parts of cement, 80 to 100 parts of fly ash, 20 to 80 parts of nano powder, 400 to 740 parts of fine sand, 10 to 15 parts of volcanic rock particles, 5 to 8 parts of cellulose ether, 20 to 40 parts of modified engineering fiber, 3 to 8 parts of lithium sulfate, 0.1 to 0.5 parts of expansion agent, and 1 to 3 parts of waterproofing agent in a mixing unit to obtain a dry-mixed mortar;
[0021] (2) The lower lining is tensioned and then sent to the assembly unit;
[0022] (3) transporting the dry-mixed mortar obtained in step (1) to an assembly unit and placing it on the upper surface of the lower lining;
[0023] (4) superimposing the upper lining layer onto the upper surface of the dry-mixed mortar to obtain a cement blanket precursor;
[0024] (5) The obtained cement blanket precursor is consolidated and cut into rolls.
[0025] The production process is realized by the above device, and the production process is simple, with little dust pollution, which is beneficial to improving the production environment and reducing maintenance costs.
[0026] Specifically, the upper lining layer and the lower lining layer in step (2) and step (4) are one or more of non-woven fabrics, woven fabrics, machine-woven fabrics, and warp-knitted fabrics, and are made of one or more of polyester fibers, polypropylene fibers, aramid fibers, or natural fibers; preferably, the upper lining layer is a 200g polypropylene staple fiber base cloth, and the lower lining layer is a 120g national standard woven cloth and / or a 200g polypropylene staple fiber base cloth. Good durability and water permeability are conducive to the curing of the cement blanket and extend the service life of the cement blanket; the consolidation in step (5) is one of needle punching consolidation, mechanical sewing, and gluing, preferably needle punching consolidation, and the needle punching consolidation process is more environmentally friendly and efficient.
[0027] Currently prepared cement blankets mainly use cement as the base material, and then add curable substances to enhance the mechanical properties of the cement blanket. However, the current cement blankets can only maintain good performance under normal conditions. In winter or in extremely cold environments at high altitudes, they will freeze and thaw and suffer quality loss. They are difficult to use normally in extremely cold environments, shortening their service life in extremely cold environments.
[0028] In this solution, fine sand serves as the aggregate for the cement blanket's curable material, cement forms the gel matrix, and a defined amount of blending powder is added to achieve excellent mechanical properties, as well as waterproofing and weather resistance. By limiting the amounts of fly ash, nanopowder, and volcanic rock particles, the optimal interplay of these three materials is achieved. Excessive amounts of engineered fiber can compromise the overall integrity of the blanket and reduce its weather resistance.
[0029] Optionally, the fly ash is acid fly ash, the nano powder is one or more of nano silicon dioxide, nano calcium carbonate, and nano silicon powder; and the particle size of the volcanic rock particles ranges from 1 to 4 mm.
[0030] The acidic fly ash can neutralize the alkaline substances in the cement base, preventing the alkaline substances from corroding the engineering fibers and reducing the service life of the cement blanket. The nanopowder can play an anti-expansion role. At the same time, the nanopowder and the micron-sized fly ash cooperate with each other to fill the gaps between the fly ash particles and the pores of the fly ash itself, making the dry-mixed mortar a denser whole and improving the waterproof and mechanical properties of the cement blanket. The volcanic rock particles are particles obtained by crushing volcanic rock blocks. The volcanic rock particles not only retain a certain porosity of the volcanic rock but also improve the compatibility of the volcanic rock with the cement material. At the same time, the volcanic rock particles can provide adsorption points for the fly ash, so that a three-level powder composition of nanopowder, fly ash particles, and volcanic rock particles is formed in the cement blanket, forming a multi-layered filling structure between the powder materials of the cement blanket, thereby improving the waterproof performance, compression resistance, and flexural resistance of the cement blanket.
[0031] Optionally, the expansion agent is nano-magnesium oxide; the waterproofing agent is zirconium silicone.
[0032] Nano-magnesium oxide has high reactivity and dispersion characteristics. It can be used as an expansion agent to improve the homogeneity of cement blanket after hydration. Zirconium silicone can crystallize with free calcium ions after hydration to fill the cracks and pores of cement-based materials at the microscopic level. In addition, Zr 2+ It can catalyze the secondary reaction of incompletely hydrated cement particles in concrete, fill pores, and thus block microcracks inside the concrete, further improving the anti-water seepage performance of the cement blanket.
[0033] Optionally, the modified engineering fiber includes one or more of polypropylene fiber, polyamide fiber or polyester fiber modified with a chlorosilane coupling agent or an acetoxysilane coupling agent.
[0034] Silane-modified engineering fibers form Si-OC or Si-O-Si cross-links during the hydration process of the cement blanket, thereby forming a dense three-dimensional network in the cement blanket, which has excellent waterproof and anti-seepage functions as well as weather resistance.
[0035] According to another aspect of the present application, a cement blanket is provided, which is prepared according to the above-mentioned cement blanket preparation process.
[0036] The beneficial effects of this application include but are not limited to:
[0037] 1. The cement blanket preparation device provided in this application can control the distribution of mortar during spreading by arranging a scraper baffle and a material baffle on the discharge barrel; at the same time, it cooperates with the slitting knife to realize the production of cement blankets of multiple width specifications on the same production line, thereby improving production efficiency.
[0038] 2. The cement blanket preparation device provided in this application avoids dust dispersion in multiple links of cement blanket production by providing a dust cover, a discharge barrel and a gusset plate, reduces dust pollution and its safety hazards, and improves the quality of the production environment.
[0039] 3. The cement blanket product provided in this application, by limiting the types, proportions and matching of mortar raw materials, enables multiple materials to fill the gaps between cement base materials in multiple dimensions. At the same time, the silane-modified engineering fibers form a three-dimensional network in the cement blanket, making the overall density of the cement blanket higher after hydration, thereby obtaining a cement blanket with higher impermeability and better mechanical properties of flexural and compressive resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0041] Figure 1 Schematic diagram of a cement blanket preparation device according to an embodiment of the present application;
[0042] Figure 2 This is a schematic diagram of a horizontal spreader involved in an embodiment of the present application;
[0043] Figure 3 Schematic diagram of a blanking baffle involved in an embodiment of the present application;
[0044] Figure 4 This is a schematic diagram of a scraper baffle according to an embodiment of the present application;
[0045] Figure 5 A schematic diagram of a slitting knife according to an embodiment of the present application;
[0046] Figure 6 This is a schematic diagram of a slitting and rolling unit involved in an embodiment of the present application.
[0047] List of parts and reference numerals:
[0048] 1. Sand making unit; 2. Material storage unit; 3. Mixing unit; 4. Assembly unit; 5. Consolidation unit; 6. Slitting and rolling unit; 7. Horizontal spreader; 8. Material receiving platform; 9. Mixing barrel; 10. Discharging barrel; 11. Discharging baffle; 12. Dust cover; 13. Grid; 14. Scraper baffle; 15. Baffle plate; 16. Slitting device; 17. Cross-cutting device; 18. Rolling machine; 19. Slitting knife; 20. Cross-cutting knife; 21. Buckle plate; 22. Broken needle adsorption device. DETAILED DESCRIPTION
[0049] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.
[0050] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. The reagents or raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents or raw materials used in the present invention are used in accordance with conventional methods in the art or in accordance with product specifications. In addition, any methods and materials similar to or equivalent to those described herein can be applied to the present invention. The preferred embodiments and materials in this patent are for illustrative purposes only.
[0051] Example 1
[0052] refer to Figures 1 to 6 The embodiment of the present application discloses a cement blanket preparation device, characterized in that it includes a sand making unit 1, a material storage unit 2, a mixing unit 3, an assembly unit 4, a consolidation unit 5 and a roll-slitting unit 6 connected in sequence;
[0053] The assembly unit 4 includes a horizontal spreader 7 and a receiving platform 8 located below the horizontal spreader 7. The horizontal spreader 7 includes a mixing barrel 9, a discharge baffle 11, and a discharge barrel 10 arranged from top to bottom. The top of the mixing barrel 9 is open and is used to receive the mixed material conveyed by the mixing unit 3. The discharge baffle 11 is arranged between the mixing barrel 9 and the discharge barrel 10, and is provided with a plurality of grids 13 on the discharge baffle 11. The rear end of the discharge barrel 10 is in close contact with the receiving platform 8. The front end of the discharge barrel 10 is provided with a scraper baffle 14, and the scraper baffle 14 is provided with a plurality of baffle plates 15. The lower end of the baffle plate 15 is in close contact with the receiving platform 8.
[0054] The dust cover 12 is arranged above the mixing barrel 9 .
[0055] The provision of the dust cover 12 and the discharge barrel 10 can reduce the scattering of cement blanket dry mortar powder during the spreading process and reduce the risk of dust pollution and dust explosion in the production workshop.
[0056] The distance between the scraper baffle 14 and the material receiving platform 8 can be adjusted according to production requirements to control the thickness of the mortar layer; the baffle plate 15 has a certain width and is tightly attached to the material receiving platform 8, so that the mortar cannot pass through the baffle plate 15, and a blank area with a certain width is formed after the cement blanket solidifies, which is convenient for subsequent cutting.
[0057] The setting of the grid 13 on the unloading baffle 11 can play a certain blocking role on the descending powder, which can reduce the unloading speed, thereby reducing dust flying and improving the quality of the workshop production environment.
[0058] In this solution, the material forward direction is considered as the front, and the opposite direction of the material forward direction is considered as the back.
[0059] Specifically, the number of the baffles 15 can be adjusted according to the size required for cement blanket production;
[0060] The sand making unit 1 includes a sand making machine, a sand and gravel separator, a multi-stage screening machine and several sand bins, which are used to make sand from ore and screen and grade it, and store it in different bins. The ore includes one or more of river pebbles, basalt, granite, limestone, bluestone, iron ore, sandstone, quartz sandstone, tailings, slag and construction waste;
[0061] The storage unit 2 includes several silos for storing different raw materials for preparing cement blanket, including cement, fly ash, nano powder, fine sand, volcanic rock particles, cellulose ether, modified engineering fiber, LiSO4, expansion agent and waterproofing agent;
[0062] The mixing unit 3 includes several weighing and metering devices and a multi-stage mixer, which are used for weighing and mixing the materials in each silo;
[0063] The consolidation unit 5 is used to consolidate the lining layer and cement mortar to form a tightly combined whole.
[0064] As an embodiment, the slitting and rolling unit 6 includes a slitting device 16, a cross-cutting device 17 and a roll forming machine 18. The slitting device 16 includes a plurality of slitting knives 19. The slitting knives 19 are arranged above the receiving table 8 and each slitting knife 19 is arranged in parallel along the vertical direction of the material advance.
[0065] The slitting knife 19 can cut the cement blanket in the longitudinal direction and cut the cement blanket into a smaller size in width.
[0066] As an embodiment, the slitting blades 19 and the baffle plates 15 are co-located and have the same number.
[0067] This arrangement enables the baffle plate 15 to form several blank areas on the cement blanket after solidification, and the slitting knife 19 cooperates with the baffle plate 15 to perform slitting in the blank areas, so that the slitting knife 19 only needs to cut the lining cloth, which not only improves production efficiency, but also improves the durability of the slitting knife 19 and reduces loss costs.
[0068] As an embodiment, the cross-cutting device 17 includes a cross-cutting knife 20 and a pinch plate 21 . The cross-cutting knife 20 is arranged on the lower side of the material receiving platform 8 , and the pinch plate 21 is arranged on the upper side of the material receiving platform 8 .
[0069] The gusset plate 21 can act as a shield when the cement blanket is cross-cut, preventing the dry mortar powder from being exposed and scattered by the force of the cross-cutting knife 20 during the cross-cutting process, thereby causing dust pollution.
[0070] As an embodiment, the broken needle adsorption device 22 is arranged on the upper side of the material receiving platform 8, and an electromagnet is provided at the bottom of the broken needle adsorption component.
[0071] During operation, the electromagnet is close to the material receiving platform 8 and is energized to generate magnetic attraction, which can absorb the broken iron needles in the cement blanket; when the operation is stopped, the electromagnet is away from the material receiving platform 8 and is de-energized to remove the broken needle waste.
[0072] Example 2
[0073] The cement blanket preparation device of Example 1 is used to prepare a cement blanket according to the following production process, including:
[0074] (1) Premixing the materials in a mixing unit to obtain dry-mixed mortar;
[0075] (2) The lower lining is tensioned and then sent to the assembly unit;
[0076] (3) transporting the dry-mixed mortar obtained in step (1) to an assembly unit and placing it on the upper surface of the lower lining;
[0077] (4) superimposing the upper lining layer onto the upper surface of the dry-mixed mortar to obtain a cement blanket precursor;
[0078] (5) The obtained cement blanket precursor is consolidated and cut into rolls.
[0079] 1# cement blanket
[0080] Dry-mix mortar materials: 160 parts cement, 80 parts fly ash, 20 parts nano-silica powder, 400 parts fine sand, 10 parts volcanic rock particles, 5 parts cellulose ether, 20 parts polypropylene fiber modified with γ-chloropropylmethyldiethoxysilane, 3 parts lithium sulfate, 0.1 parts nano-magnesium oxide, and 1 part zirconium silicone;
[0081] The lower lining is 120g national standard woven cloth; the upper lining is polypropylene staple fiber base cloth;
[0082] A 1# cement blanket was prepared.
[0083] 2# cement blanket
[0084] Dry-mix mortar materials: 500 parts cement, 100 parts fly ash, 80 parts nano-calcium carbonate, 740 parts fine sand, 15 parts volcanic rock particles, 8 parts cellulose ether, 40 parts γ-acetoxypropylmethyldiethoxysilane-modified polyester fiber, 8 parts lithium sulfate, 0.5 parts nano-magnesium oxide, and 3 parts zirconium silicone;
[0085] The lower lining is 200g polypropylene staple fiber base fabric;
[0086] The upper lining is 200g polypropylene staple fiber base fabric;
[0087] A 2# cement blanket was prepared.
[0088] 3# cement blanket
[0089] Dry-mix mortar materials: 350 parts cement, 90 parts fly ash, 65 parts nano-silica, 600 parts fine sand, 12 parts volcanic rock particles, 6 parts cellulose ether, 30 parts phenyltrichlorosilane-modified polyamide fiber, 6 parts lithium sulfate, 0.3 parts nano-magnesium oxide, and 3 parts zirconium silicone;
[0090] The lower lining is 200g polypropylene staple fiber base fabric and 120g national standard woven fabric;
[0091] The upper lining is 200g polypropylene staple fiber base fabric;
[0092] 3# cement blanket was prepared.
[0093] 4# cement blanket
[0094] The difference from 3# cement blanket is that the expansion agent used is UEA expansion agent.
[0095] 5# cement blanket
[0096] The difference from 3# cement blanket is that the fly ash used is alkaline fly ash.
[0097] 6# cement blanket
[0098] The difference from 3# cement blanket is that the nano powder used is nano boron nitride.
[0099] D1# cement blanket
[0100] The difference from 3# cement blanket is that the engineering fiber used is polypropylene fiber modified with γ-aminopropyltriethoxysilane.
[0101] D2# cement blanket
[0102] The difference from 3# cement blanket is that the volcanic rock used is volcanic rock particles with a particle size range of 10 to 20 mm.
[0103] D3# cement blanket
[0104] The difference from 3# cement blanket is that lithium sulfate is replaced by lithium carbonate.
[0105] D4# cement blanket
[0106] The difference from 3# cement blanket is that the amount of polyamide fiber modified with phenyltrichlorosilane is 80 parts.
[0107] D5# cement blanket
[0108] The difference from 3# cement blanket is that the amount of volcanic rock particles added is 30 parts.
[0109] D6# cement blanket
[0110] The difference from 3# cement blanket is that the amount of nano magnesium oxide added is 3 parts.
[0111] Experimental example
[0112] According to the "Test Methods for Water Consumption, Setting Time and Stability of Cement Standard Consistency" (GB / T1346-2011), the setting time test was conducted on the dry mortar used in the 1#~5# and D1#~D3# cement blankets;
[0113] Referring to the Test Method for Cement Mortar Strength (GB / T17671-2021), the compressive and flexural strength values of cement test blocks prepared from the dry mortar used in cement blankets 1# to 5# and D1# to D3# were measured;
[0114] With reference to the Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete (GB / T50082-2009), the anti-permeability performance of 1#~5# and D1#~D3# cement blankets was tested to obtain the maximum water pressure;
[0115] Test the freeze-thaw resistance according to the "Test Code for Cement and Cement Concrete for Highway Engineering" (JTG3420-2020);
[0116] The experimental results are shown in Table 1.
[0117] Table 1
[0118]
[0119]
[0120] As shown in the table above, after hydration of the dry mortar in this cement blanket, the various materials work together to achieve excellent water seepage prevention, weather resistance, and improved mechanical properties. The freeze-thaw resistance of this cement blanket is less than 0.21%, making it more suitable for use in cold environments and resolving the technical issue that currently hinders the long-term use of cement blankets in cold environments.
[0121] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.
[0122] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.
Claims
1. A cement blanket preparation device, characterized in that: It includes a sand making unit, a material storage unit, a mixing unit, an assembly unit, a consolidation unit and a slitting unit connected in sequence; The assembly unit comprises a horizontal material spreader and a material receiving platform located below the horizontal material spreader, wherein the horizontal material spreader comprises a mixing barrel, a material discharge baffle and a material discharge barrel arranged from top to bottom, wherein the top opening of the mixing barrel is arranged for receiving the mixed material conveyed by the mixing unit; the material discharge baffle is arranged between the mixing barrel and the material discharge barrel, and a plurality of grids are arranged on the material discharge baffle; the rear end of the material discharge barrel is in close contact with the material receiving platform; the front end of the material discharge barrel is provided with a scraper baffle, and a plurality of material baffle plates are arranged on the scraper baffle, and the lower end of the material baffle plate is in close contact with the material receiving platform; A dust cover is arranged above the mixing barrel.
2. The cement blanket preparation device according to claim 1, characterized in that: The slitting and rolling unit comprises a slitting device, a cross-cutting device and a rolling machine. The slitting device comprises a plurality of slitting knives, which are arranged above the material receiving table and are arranged in parallel along the vertical direction of the material.
3. The cement blanket preparation device according to claim 2, characterized in that: The slitting knives and the baffle plates are co-located and have the same number.
4. The cement blanket preparation device according to claim 2, characterized in that: The cross-cutting device comprises a cross-cutting knife and a buckle plate, wherein the cross-cutting knife is arranged at the lower side of the material receiving platform, and the buckle plate is arranged at the upper side of the material receiving platform.
5. The cement blanket preparation device according to claim 1, characterized in that: A broken needle adsorption device is provided between the consolidation unit and the slitting and rolling unit. The broken needle adsorption device is arranged on the upper side of the material receiving platform. An electromagnet is provided at the bottom of the broken needle adsorption device.
6. A cement blanket production process, characterized in that: The following steps are involved: (1) premixing the following materials by weight: 160 to 500 parts of cement, 80 to 100 parts of fly ash, 20 to 80 parts of nano powder, 400 to 740 parts of fine sand, 10 to 15 parts of volcanic rock particles, 5 to 8 parts of cellulose ether, 20 to 40 parts of modified engineering fiber, 3 to 8 parts of lithium sulfate, 0.1 to 0.5 parts of expansion agent and 1 to 3 parts of waterproofing agent in a mixing unit to obtain a dry-mixed mortar; (2) The lower lining is tensioned and sent to the assembly unit; (3) transporting the dry-mixed mortar obtained in step (1) to an assembly unit and placing it on the upper surface of the lower lining; (4) superimposing an upper lining layer onto the upper surface of the dry-mixed mortar to obtain a cement blanket precursor; (5) The obtained cement blanket precursor is consolidated and cut into rolls.
7. The cement blanket production process according to claim 6, characterized in that: The fly ash is acid fly ash, the nano powder is one or more of nano silicon dioxide, nano calcium carbonate and nano silicon powder; the particle size of the volcanic rock particles ranges from 1 to 4 mm.
8. The cement blanket production process according to claim 6, characterized in that: The expansion agent is nano magnesium oxide; the waterproofing agent is zirconium silicone.
9. The cement blanket production process according to claim 6, characterized in that: The modified engineering fiber includes one or more of polypropylene fiber, polyamide fiber and polyester fiber modified by chlorosilane coupling agent or acetoxysilane coupling agent.
10. A cement blanket, characterized in that: The cement blanket preparation device according to claims 1 to 5 or the cement blanket preparation process according to claims 6 to 9 is obtained.