A method for preparing electric poles from high-water-content solid waste
By constructing the CaO-Al2O3-SiO2 tripartite equilibrium state and pressure steaming maintenance process, the power poles are prepared by using marine silt, magnetic red mud and calcium carbide slag, which solves the resource utilization problem of high water-containing solid waste, and achieves low-cost and efficient solid waste disposal and power pole production.
Patent Information
- Application Number
- CN202510252820.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2045-03-05
AI Technical Summary
Highly water-containing solid waste such as marine silt, calcium carbide slag and magnetic separation red mud are difficult to effectively utilize, have high treatment costs, are highly harmful to the environment, and traditional methods are difficult to achieve their direct application in concrete.
Marine silt, magnetic separation red mud and calcium carbide slag are used as the main raw materials, and by constructing a ternary equilibrium state of CaO-Al2O3-SiO2 and combining with the pressure steaming and curing process, telephone poles are prepared, and composite skeletons are constructed using fiber-reinforced plastic ribs and high-strength fiber mesh fabrics to promote hydration reactions and reduce moisture content.
The coordinated disposal of a variety of high-water solid waste is achieved, the dehydration cost is reduced, and the power poles with excellent mechanical properties are produced. They are suitable for existing industrial production, with high economic value and significant environmental benefits.
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of solid waste resource utilization, and in particular to a method for preparing electric poles from high-water-content solid waste. Background Art
[0002] As domestic industries mature and infrastructure expands into new areas, new types of solid waste are emerging, posing a serious threat to the environment. Highly water-rich solid wastes pose a particularly significant challenge. They present all the hazards associated with dry solid waste, but their highly contaminated liquid wastes place even greater demands on storage facilities. Therefore, developing a resource-recovery method for treating highly water-rich solid wastes is crucial.
[0003] Marine silt is the main form of solid waste generated during harbor dredging and coastal construction. Its huge volume, high salinity and low activity make it difficult to be used directly as a concrete admixture like other ground materials.
[0004] Calcium carbide slag is the main solid waste produced after the industrial production of acetylene. It has a high dry basis calcium content and has great resource utilization potential. However, its high water content leads to high energy consumption in processing, which greatly weakens its economic value.
[0005] Magnetic red mud is the tailings left after red mud undergoes further magnetic separation. High-value-added components have been essentially completely extracted, leaving the remaining components with high water content and alkalinity. Compared to ordinary red mud, these three types of high-water content solid wastes all face challenges such as high dehydration costs, significant environmental hazards, and low utilization value. Summary of the Invention
[0006] The purpose of the present invention is to provide a method for preparing electric poles from high-water-content solid waste, and at the same time utilize carbide slag, seabed silt and magnetic separation red mud to achieve coordinated disposal and reuse of multiple solid wastes.
[0007] This invention proposes constructing a CaO-Al2O3-SiO2 ternary equilibrium using undisturbed marine silt, magnetically separated red mud, and carbide slag. This equilibrium is then released through pressure steaming to fully release its active components. Furthermore, using utility poles as a carrier significantly reduces dehydration costs, providing a new, low-cost method for treating high-water-content solid waste.
[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:
[0009] A method for preparing electric poles from high-water-content solid waste comprises the following steps:
[0010] Step 1: Place a fiber reinforced plastic rib in a ring fixture, impregnate a high-strength fiber mesh with a layer of thermosetting phenolic resin, first wrap a layer of the high-strength fiber mesh impregnated with thermosetting phenolic resin around the inner side of the fiber reinforced plastic rib, and then wrap a layer of the high-strength fiber mesh impregnated with thermosetting phenolic resin around the outer side of the fiber reinforced plastic rib to obtain a reinforcement rib cage;
[0011] Step 2: After curing the reinforcement cage net obtained in step 1, a cured reinforcement cage net is obtained, and the cured reinforcement cage net is placed in a utility pole mold;
[0012] Step 3: Weigh the following raw materials by weight:
[0013] 165-205 parts of marine silt, 80-130 parts of magnetically separated red mud, 220-290 parts of carbide slag, 5-15 parts of nano-CSH gel seed crystals, 10-30 parts of zeolite powder, 2-5 parts of sodium hexametaphosphate, and 8-15 parts of potassium permanganate;
[0014] After stirring the above raw materials until uniform, evenly spread them into the electric pole mold in step 2;
[0015] Step 4: Move the entire electric pole mold after the treatment in step 3 to a centrifuge, demould it after centrifugal treatment, and prepare the electric pole prepared from the high-water-content solid waste.
[0016] Furthermore, the fiber reinforced plastic reinforcement in step 1 is one of glass fiber reinforced plastic reinforcement, carbon fiber reinforced plastic reinforcement or aramid fiber reinforced plastic reinforcement;
[0017] The high-strength fiber mesh cloth in step 1 is one of aramid fiber mesh cloth, glass fiber mesh cloth, polypropylene fiber mesh cloth or carbon fiber mesh cloth.
[0018] Furthermore, in step 1, the high-strength fiber mesh cloth is impregnated with a layer of thermosetting phenolic resin, and the thickness of the impregnated thermosetting phenolic resin is 2-3 mm.
[0019] Furthermore, the curing conditions in step 2 are: curing at a temperature of 150-180° C. for 1-3 hours to obtain a cured reinforcement cage mesh;
[0020] The conditions of the centrifugal treatment in step 4 are: centrifugation at a speed of 300-700 r / min for 3-10 min, autoclaving and curing at 0.6-1.0 MPa and 150-200° C. for 4-8 h, and then demolding.
[0021] Furthermore, the marine silt in step 3 is original marine silt with a water content of 40-60%.
[0022] Furthermore, the magnetically separated red mud in step 3 is original magnetically separated red mud with a moisture content of 50-80% and a dry basis F2O3 content of less than 2%.
[0023] Furthermore, the carbide slag in step 3 is original carbide slag, with a moisture content of 45-70% and a dry basis CaO greater than 90%.
[0024] Furthermore, the nano-CSH gel seed crystals, sodium hexametaphosphate, and potassium permanganate in step 3 are all industrial-grade products with a purity greater than 99%.
[0025] Furthermore, the zeolite powder in step 3 is a powder obtained by grinding natural zeolite rock, and has a specific surface area greater than 600m 2 / g.
[0026] The present invention also discloses a utility pole, which is prepared according to the above method for preparing a utility pole from high-water-content solid waste. The utility pole produced by the present invention has excellent bending and compression resistance and good durability.
[0027] In the present invention, the number of fiber reinforced plastic ribs placed in the annular fixture in step 1 may be 8 to 16.
[0028] In the present invention, high-strength fiber mesh cloth impregnated with thermosetting phenolic resin is wound on the fiber-reinforced plastic rib in two layers, one on the inner side and the other on the outer side.
[0029] In the present invention, the distribution of the material in step 3 to the utility pole mold in step 2 is achieved by a material distribution machine.
[0030] In the present invention, the various components of the utility pole are mutually complementary and indispensable, forming a mutually coordinated system, the mechanism of which is as follows:
[0031] Using marine silt as the source of silica and aluminum, carbide slag as the source of calcium, and magnetically separated red mud as the activating component, a scientifically designed ratio was used to construct a practical alkali-activated cementitious material system.
[0032] At the same time, in order to solve the defect of low activity of the above-mentioned materials, the pressure steam curing process and nano-CSH gel crystal seeds are introduced to promote the hydration reaction and give the products high-quality mechanical properties.
[0033] Since the powder particles in the selected solid waste are extremely fine and prone to agglomeration, an appropriate amount of sodium hexametaphosphate is introduced to assist in the dispersion of the powder particles.
[0034] At the same time, the moisture content of the original high-water-content solid waste fluctuates greatly. In this invention, zeolite powder is introduced to absorb excess water and adjust the slurry consistency. Through the above means, the workability of the slurry is guaranteed to meet the requirements of the utility pole production process.
[0035] At the same time, the nano-CSH gel seeds act as crystal nuclei in the reaction system, reducing the nucleation barrier and accelerating the hydration reaction.
[0036] It should be noted that marine silt contains high levels of chloride and organic matter, which can significantly affect hydration and product durability. This invention utilizes potassium permanganate to oxidize and remove organic matter, replacing the traditional steel reinforcement with a composite reinforcement of fiber-reinforced plastic bars and high-strength fiber mesh. This eliminates the risk of steel corrosion and offers a lightweight composite reinforcement with superior mechanical properties compared to steel, resulting in a product with enhanced mechanical properties.
[0037] Compared with the prior art, the present invention has the following beneficial effects:
[0038] This invention replaces the steel cages used in traditional utility poles with a composite mesh constructed of fiber-reinforced plastic and high-strength fiber mesh. Cement is replaced as the binder by using a combination of various high-water-content solid wastes in the following scientifically formulated proportions. Through a series of processes, including reinforcing, pouring, centrifugation, and autoclaving, utility poles of various specifications with excellent mechanical properties can be produced. This preparation method not only achieves resource utilization through the combined use of multiple solid wastes but also provides a new model for the intensive utilization of high-water-content solid wastes.
[0039] 2. The main raw materials used in the present invention are marine silt, magnetically separated red mud and carbide slag, which realizes the "waste treatment with waste" and the coordinated disposal of multiple solid wastes, with significant social and environmental benefits.
[0040] 3. The present invention utilizes the centrifugal process in the preparation process of electric poles to achieve the dehydration treatment of high-water-content solid waste, so that no additional mixing water is required in the configuration of the cementitious material, and the hardened body is in a low-water-content state, achieving the purpose of saving water resources and saving waste disposal costs.
[0041] 4. The method of preparing electric poles from high-water-content solid waste of the present invention has excellent bending and compression resistance and good durability.
[0042] 5. The method of preparing electric poles from high-water-content solid waste of the present invention can be directly applied to existing mature industrial production processes, with low startup costs and high economic value. DETAILED DESCRIPTION
[0043] The technical solutions provided by the present invention are described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.
[0044] In the embodiments of the present invention, the nano-CSH gel seed crystals, sodium hexametaphosphate, and potassium permanganate used are all industrial-grade products with a purity greater than 99%. The marine sludge is undisturbed marine sludge, the red mud is undisturbed magnetically separated red mud with a dry-basis F2O3 content of less than 2%, and the carbide slag is undisturbed carbide slag with a dry-basis CaO content greater than 90%.
[0045] Example 1
[0046] Step 1: Take 8 carbon fiber reinforced plastic bars and place them in a ring fixture. Impregnate the carbon fiber mesh with a layer of thermosetting phenolic resin. First, wrap the carbon fiber mesh impregnated with thermosetting phenolic resin around the inside of the carbon fiber reinforced plastic bar. Then, wrap the carbon fiber mesh impregnated with thermosetting phenolic resin around the outside of the carbon fiber reinforced plastic bar to obtain a reinforcement cage.
[0047] Step 2: Curing the reinforced steel cage net obtained in step 1 at a curing temperature of 150° C. for 2 h. After the curing treatment, the cured reinforced steel cage net is obtained and placed in a mold of a uniform diameter electric pole (specification: Φ400 mm × 9 m);
[0048] Step 3: Then take 237 parts of carbide slag (52% moisture content), 190 parts of marine silt (49% moisture content), 107 parts of magnetically separated red mud (56% moisture content), 14 parts of nano CSH gel crystal seeds, and zeolite powder (specific surface area of 730m 2 / g) 13 parts, sodium hexametaphosphate 2.9 parts, potassium permanganate 11 parts, stirred evenly and then evenly distributed to the electric pole mold through a distribution machine.
[0049] Step 4: The entire utility pole mold, processed in Step 3, is moved to a centrifuge for centrifugal treatment and demolding. The centrifugal treatment is performed at 500 rpm for 5 minutes, followed by autoclave curing at 0.8 MPa and 180°C for 6 hours before demolding to produce the utility pole.
[0050] At the same time, another portion of the uniformly stirred gelling material is placed in a cylindrical mold, and after the same centrifugal and autoclaving process as that used in the above-mentioned production of electric poles, a 100 mm × 100 mm × 100 mm test block is cut out.
[0051] The cracking bending moment of the utility pole prepared in Example 1 was tested (test standard is GB 4623-2014).
[0052] The prepared test blocks were subjected to compressive strength tests (test standard is GB / T 50081-2019). The test results showed that the cracking moment was 303.1 kN·m and the concrete compressive strength was 113.4 MPa.
[0053] Example 2
[0054] Step 1: Take 12 glass fiber reinforced plastic bars and place them in a ring fixture. Impregnate the glass fiber mesh with a layer of thermosetting phenolic resin. First, wrap the glass fiber mesh impregnated with thermosetting phenolic resin around the inside of the glass fiber reinforced plastic bar. Then, wrap the glass fiber mesh impregnated with thermosetting phenolic resin around the outside of the glass fiber reinforced plastic bar to obtain a reinforcement cage.
[0055] Step 2: Curing the reinforced steel cage net obtained in step 1 at a curing temperature of 180° C. for 1 hour. After the curing treatment, the cured reinforced steel cage net is obtained and placed in a mold of a uniform diameter electric pole (specification: Φ400 mm × 9 m);
[0056] Step 3: Then take 290 parts of carbide slag (45% moisture content), 205 parts of marine silt (40% moisture content), 80 parts of magnetically separated red mud (80% moisture content), 15 parts of nano CSH gel crystal seeds, and zeolite powder (specific surface area of 810m 2 / g) 30 parts, 5 parts of sodium hexametaphosphate, and 15 parts of potassium permanganate are stirred and evenly distributed to the electric pole mold through a distribution machine.
[0057] Step 4: Move the entire electric pole mold after the treatment in step 3 to a centrifuge, demould it after centrifugal treatment, the centrifugal treatment conditions are centrifugation at a rate of 300r / min for 10min, and then autoclave curing in an environment of 1.0MPa and 150℃ for 8h before demoulding to obtain the electric pole.
[0058] At the same time, another portion of the uniformly stirred gelling material is placed in a cylindrical mold, and after the same centrifugal and autoclaving process as that used in the above-mentioned production of electric poles, a 100 mm × 100 mm × 100 mm test block is cut out.
[0059] The cracking bending moment of the utility pole prepared in Example 2 was tested (test standard is GB 4623-2014).
[0060] The prepared test blocks were subjected to compressive strength tests (test standard is GB / T 50081-2019). The test results showed that the cracking moment was 378.4 kN·m and the concrete compressive strength was 104.9 MPa.
[0061] Example 3
[0062] Step 1: Take 16 aramid fiber reinforced plastic bars and place them in a ring fixture. Impregnate the aramid fiber mesh cloth with a layer of thermosetting phenolic resin. First, wrap the aramid fiber mesh cloth impregnated with thermosetting phenolic resin on the inside of the aramid fiber reinforced plastic bar. Then, wrap the aramid fiber mesh cloth impregnated with thermosetting phenolic resin on the outside of the aramid fiber reinforced plastic bar to obtain a reinforcement bar cage.
[0063] Step 2: Curing the reinforced steel cage net obtained in step 1 at a curing temperature of 160° C. for 3 hours to obtain a cured reinforced steel cage net, which is then placed in a mold of a uniform-diameter electric pole (with a specification of Φ400 mm × 12 m);
[0064] Step 3: Then take 220 parts of carbide slag (70% moisture content), 165 parts of marine silt (60% moisture content), 130 parts of magnetic separation red mud (50% moisture content), 5 parts of nano CSH gel crystal seeds, zeolite powder (specific surface area of 780m 2 / g) 10 parts, 2 parts of sodium hexametaphosphate, 8 parts of potassium permanganate, after stirring evenly, use a distribution machine to evenly distribute the materials to the electric pole mold.
[0065] Step 4: Move the entire electric pole mold after the treatment in step 3 to a centrifuge, demould it after centrifugal treatment, the centrifugal treatment conditions are centrifugation at a speed of 700r / min for 3 minutes, and then autoclave curing in an environment of 0.6MPa and 200℃ for 4 hours before demoulding to obtain the electric pole.
[0066] At the same time, another portion of the uniformly stirred gelling material is placed in a cylindrical mold, and after the same centrifugal and autoclaving process as that used in the above-mentioned production of electric poles, a 100 mm × 100 mm × 100 mm test block is cut out.
[0067] The cracking bending moment of the utility pole prepared in this embodiment was tested (the test standard is GB 4623-2014), and the prepared test block was subjected to a compressive strength test (the test standard is GB / T 50081-2019). The test showed that the cracking bending moment was 240.4 kN·m and the concrete compressive strength was 118.2 MPa.
[0068] As can be seen from the above examples, the present method for preparing utility poles from high-water-content solid waste is suitable for producing concrete utility poles of various specifications, with the resulting poles meeting or even exceeding the cracking bending moments specified in relevant standards. The cementitious system, constructed using marine sludge, magnetically separated red mud, and carbide slag as the primary raw materials, along with additional admixtures and mixed materials, produces concrete with compressive strength exceeding 100 MPa after centrifugation and autoclaving, ensuring the product's excellent mechanical properties.
[0069] The present invention has been described above by way of example in conjunction with the embodiments. It is obvious that the implementation of the present invention is not limited to the above-mentioned methods. As long as various improvements are made using the method concepts and technical solutions of the present invention, or the concepts and technical solutions of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.
Claims
1. A method for preparing electric poles from high-water-content solid waste, characterized in that: The following steps are involved: Step 1: Place a fiber reinforced plastic rib in a ring fixture, impregnate a high-strength fiber mesh with a layer of thermosetting phenolic resin, first wrap a layer of the high-strength fiber mesh impregnated with thermosetting phenolic resin around the inner side of the fiber reinforced plastic rib, and then wrap a layer of the high-strength fiber mesh impregnated with thermosetting phenolic resin around the outer side of the fiber reinforced plastic rib to obtain a reinforcement rib cage; Step 2: After curing the reinforcement cage net obtained in step 1, a cured reinforcement cage net is obtained, and the cured reinforcement cage net is placed in a utility pole mold; Step 3: Weigh the following raw materials by weight: 165-205 parts of marine silt, 80-130 parts of magnetically separated red mud, 220-290 parts of carbide slag, 5-15 parts of nano-CSH gel seed crystals, 10-30 parts of zeolite powder, 2-5 parts of sodium hexametaphosphate, and 8-15 parts of potassium permanganate; After stirring the above raw materials until uniform, evenly spread them into the electric pole mold in step 2; Step 4: Move the entire electric pole mold after the treatment in step 3 to a centrifuge, demould it after centrifugal treatment, and prepare the electric pole prepared from the high-water-content solid waste.
2. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The fiber reinforced plastic reinforcement described in step 1 is one of glass fiber reinforced plastic reinforcement, carbon fiber reinforced plastic reinforcement or aramid fiber reinforced plastic reinforcement; The high-strength fiber mesh cloth in step 1 is one of aramid fiber mesh cloth, glass fiber mesh cloth, polypropylene fiber mesh cloth or carbon fiber mesh cloth.
3. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: In step 1, the high-strength fiber mesh cloth is impregnated with a layer of thermosetting phenolic resin, and the thickness of the impregnated thermosetting phenolic resin is 2-3 mm.
4. The method for preparing utility poles from high-water-content solid waste according to claim 1, characterized in that: The curing conditions in step 2 are: curing at a temperature of 150-180° C. for 1-3 hours to obtain a cured reinforcement cage mesh; The conditions of the centrifugal treatment in step 4 are: centrifugation at a speed of 300-700 r / min for 3-10 min, autoclaving and curing at 0.6-1.0 MPa and 150-200° C. for 4-8 h, and then demolding.
5. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The marine silt in step 3 is original marine silt with a water content of 40-60%.
6. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The magnetically separated red mud in step 3 is original magnetically separated red mud with a moisture content of 50-80% and a dry basis Fe2O3 content of less than 2%.
7. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The carbide slag in step 3 is original carbide slag with a moisture content of 45-70% and a dry basis CaO content greater than 90%.
8. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The nano-CSH gel seed crystals, sodium hexametaphosphate, and potassium permanganate in step 3 are all industrial-grade products with a purity greater than 99%.
9. The method for preparing electric poles from high-water-content solid waste according to claim 1, characterized in that: The zeolite powder in step 3 is obtained by grinding natural zeolite rock into powder, and the specific surface area of the zeolite powder is greater than 600m 2 / g.
10. A utility pole, characterized in that: The utility pole is prepared according to the method for preparing utility poles from high-water-content solid waste as described in any one of claims 1 to 9.
Citation Information
Patent Citations
Environmentally-friendly power transmission rack
CN105330227A
Corrosion-resistant earthing device for power transmission line tower
CN105507650A