All-solid waste road base material and construction system and method thereof

Abstract

The invention provides an all-solid-waste road base material and a construction system and method thereof.The all-solid-waste road base material comprises steel slag, a cementing material accounting for 3%-6% of the mass of the steel slag and water accounting for 6%-9% of the total mass of the steel slag and the cementing material; the cementing material comprises the following components in percentage by mass: 70%-76% of slag, 17%-23% of carbide slag and 4%-10% of desulfurized gypsum. Industrial solid waste is used for preparing a cementing material to replace cement, and steel slag is used for replacing gravel aggregate, so that the purpose of solid waste resource utilization is achieved; meanwhile, by designing the construction system, unnecessary factors in the construction process are reduced, construction links are reduced, the construction time is shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of solid waste resource recycling, specifically to a solid waste road base material and its construction system and method. Background Technology

[0002] Industrial solid waste includes steel slag, ore slag, fly ash, desulfurization gypsum, and other industrial waste residues. Taking Xinjiang as an example, activities in industries such as mining, iron and steel metallurgy, power generation, and manufacturing generate a large amount of solid waste.

[0003] In terms of roadbed material processing, existing construction systems typically involve the combined use of multiple devices, which requires a large number of devices and a large area of ​​land. Furthermore, the combined use of multiple devices and the numerous steps involved can easily lead to material waste, reducing utilization rate and efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a solid waste road base material and its construction system and method. It utilizes industrial solid waste to prepare cementitious materials to replace cement and steel slag to replace crushed stone aggregate, thereby achieving the goal of solid waste resource utilization and reducing the consumption of cement and crushed stone materials. At the same time, by designing a construction system, it reduces unnecessary factors in the construction process, reduces construction steps, shortens construction time, and improves construction efficiency.

[0005] This invention is achieved through the following technical solution: In a first aspect, the present invention provides a solid waste road base material, comprising steel slag, cementitious material comprising 3%-6% of the mass of steel slag, and water comprising 7%-9% of the total mass of steel slag and cementitious material; the cementitious material comprises, by mass percentage: 70%-76% slag, 17%-23% calcium carbide slag, and 4%-10% desulfurized gypsum.

[0006] Preferably, the cementitious material comprises, by mass percentage: 73% slag, 20% carbide slag, and 7% desulfurized gypsum.

[0007] Preferably, the slag comprises, by mass percentage: 39%-44% calcium oxide, 28%-32% silicon dioxide, 8%-12% aluminum oxide, 0.4%-0.7% ferric oxide, 7%-10% magnesium oxide, 1%-2% sodium oxide, 0.5%-0.8% potassium oxide, and 1.5%-3.5% sulfur trioxide.

[0008] Preferably, the carbide slag comprises, by mass percentage: 85%-90% calcium oxide, 4%-8% silicon dioxide, 1%-3% aluminum oxide, 1%-2% ferric oxide, 0.2%-0.4% magnesium oxide, 0.3%-0.4% sodium oxide, 0.1%-0.3% potassium oxide, and 1%-2% sulfur trioxide.

[0009] Preferably, the desulfurized gypsum comprises, by mass percentage: 38%-43% calcium oxide, 52%-56% sulfur trioxide, 2%-4% silicon dioxide, 0.5%-1% aluminum oxide, 0.2%-0.4% ferric oxide, 0.1%-0.3% magnesium oxide, 0.5%-0.7% sodium oxide, and 0.04%-0.08% potassium oxide.

[0010] Secondly, the present invention provides a construction system for all-solid waste road base material, comprising: a screening machine, several storage tanks, a first ball mill, a second ball mill, a third ball mill, a storage quantitative mixer, a material mixing tank, and a water storage tank; The inlet of the screening machine is used to receive steel slag; the discharge ports of each screen of the screening machine are connected to the storage tanks one by one, and the outlet of the storage tanks is connected to the inlet of the slag mixing tank; the inlets of the first ball mill, the second ball mill, and the third ball mill are used to receive slag, carbide slag, and desulfurized gypsum, respectively, and the outlets of the first ball mill, the second ball mill, and the third ball mill are all connected to the inlet of the storage metering agitator, and the outlet of the storage metering agitator is connected to the inlet of the slag mixing tank; the outlet of the water storage tank is connected to the inlet of the slag mixing tank.

[0011] Preferably, the storage metering stirrer is provided with a first inlet, a second inlet and a third inlet at the top; the outlets of the first ball mill, the second ball mill and the third ball mill are respectively connected to the first inlet, the second inlet and the third inlet; the storage metering stirrer is provided with three baffles at the top, and the first inlet, the second inlet and the third inlet are separated from each other by the baffles.

[0012] Furthermore, the storage quantitative mixer is equipped with a mixer and a first storage tank, a second storage tank, and a third storage tank connected to the first inlet, the second inlet, and the third inlet, respectively. The bottom of the first storage tank, the second storage tank, and the third storage tank is equipped with a first automatic weighing device, a second automatic weighing device, and a third automatic weighing device, respectively. The first automatic weighing device, the second automatic weighing device, and the third automatic weighing device weigh the required mass of slag, carbide slag, and desulfurized gypsum, and then transport the slag, carbide slag, and desulfurized gypsum into the mixer. The outlet of the mixer is connected to the inlet of the slag mixing tank.

[0013] Furthermore, the first automatic weighing device includes: a baffle plate, an opening and closing device, a first opening and closing control lever, a second opening and closing control lever, a discharge plate, a weighing sensor, a weighing information setting device, and a transfer plate; the baffle plate is located at the outlet of the storage bin, and the discharge plate is located on the connecting channel between the outlet of the storage bin and the transfer plate; the opening and closing device controls the opening and closing of the baffle plate and the discharge plate respectively through the first opening and closing control lever and the second opening and closing control lever; a weighing sensor is provided on the surface of the discharge plate, and the weight collected by the weighing sensor is transmitted to the weighing information setting device. When the weighing information setting device determines that the weight has reached the preset value, it controls the opening and closing device to operate so as to control the baffle plate to close and the discharge plate to open; the structures of the second and third automatic weighing devices are the same as those of the first automatic weighing device.

[0014] Thirdly, the present invention provides a construction method for a solid waste road base material, based on the aforementioned construction system, comprising: transporting steel slag to a screening machine via a spiral feeder; screening the steel slag via the screening machine; and transporting the screened steel slag particles of different grades to corresponding storage bins via a spiral feeder; transporting slag, carbide slag, and desulfurized gypsum to a first ball mill, a second ball mill, and a third ball mill respectively via a spiral feeder for ball milling; and transporting the ball-milled slag, carbide slag, and desulfurized gypsum to a storage bin via a spiral feeder. In the quantitative mixer, slag, carbide slag, and desulfurized gypsum are stored, weighed, and mixed to produce the required cementitious material. Steel slag in the storage tank is fed into the slag mixing tank by a constant-speed feed belt. It is first mixed by a spiral agitator in the slag mixing tank. Then, water of the required mass is injected into the slag mixing tank from the water storage tank for slag treatment. After the slag treatment is completed, the cementitious material that has been mixed in the quantitative mixer is transferred to the slag mixing tank by a constant-speed feed belt for mixing to obtain the all-solid waste road base material.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention uses slag, carbide slag, and desulfurized gypsum as raw materials to form a cementitious material. The active calcium oxide, silica, and alumina in the slag, the calcium hydroxide in the carbide slag, and the calcium sulfate in the desulfurized gypsum react to form calcium silicate, calcium aluminate, and calcium vanadate gels, providing strength to the steel slag. This invention, by fully utilizing industrial solid wastes such as slag, desulfurized gypsum, and carbide slag, alleviates the space resource problems, environmental damage problems, and cement material consumption problems caused by stockpiling. By using the aforementioned all-solid-waste cementitious material to improve and utilize steel slag, a road base course with higher strength can be produced. This not only improves the consumption of cement materials and road subbase aggregates but also further improves the utilization of steel slag, promoting solid waste utilization and reducing costs.

[0016] This invention also designs a construction system for the aforementioned solid waste road base material. The initial material is processed by a screening machine and a ball mill, and then conveyed to the corresponding storage device via a conveyor belt. The storage device includes storage, automatic weighing, and stirring functions. After the steel slag and cementitious materials are processed, they are conveyed to the curing and mixing tank via a conveyor device. The curing and mixing tank includes quantitative water intake, curing, and stirring functions. This system can reduce unnecessary factors in the construction process, reduce construction steps, shorten construction time, and improve construction efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the construction system for the all-solid-waste road base material of the present invention.

[0019] Figure 2 This is a schematic diagram of the upper part of the quantitative storage stirrer of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the quantitative storage stirrer of the present invention.

[0021] Figure 4 This is a schematic diagram of the automatic weighing device of the present invention.

[0022] In the diagram: 1. Spiral feeder belt, 2. Screening machine, 3. Storage bin, 4. Constant speed feeder belt, 5-1. First ball mill, 5-2. Second ball mill, 5-3. Third ball mill, 6. Water storage tank, 7. Pumping device, 8. Quantitative storage mixer, 81-1. First inlet, 81-2. Second inlet, 81-3. Third inlet, 82. Baffle plate, 83-1. First storage bin, 83-2. Second storage bin, 83-3. Third storage bin, 84- 1. First automatic weighing device, 84-2. Second automatic weighing device, 84-3. Third automatic weighing device, 841. Weighing information setting device, 842. Opening and closing device, 8421-1. First opening and closing control lever, 8421-2. Second opening and closing control lever, 843. Sensor wire, 844. Weighing sensor, 845. Discharge plate, 846. Baffle plate, 847. Transfer plate, 85. Agitator, 9. Sterilizing mixing tank, 10. Water injection rate controller. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0025] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses. Furthermore, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not intended to limit the order of the method steps or define the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0026] Furthermore, it should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements.

[0027] The solid waste road base material of the present invention includes steel slag, cementitious material accounting for 3%-6% of the mass of steel slag, and water accounting for 7%-9% of the total mass of steel slag and cementitious material; the cementitious material includes, by mass percentage: 70%-76% slag, 17%-23% calcium carbide slag, and 4%-10% desulfurized gypsum.

[0028] The active calcium oxide, silicon dioxide, and aluminum oxide in slag, the calcium hydroxide in carbide slag, and the calcium sulfate in desulfurized gypsum react during the mixing and curing process to form gels such as calcium silicate, calcium aluminate, and calcium vanadate, which provide strength to the steel slag. The cementitious material mixed with the steel slag can be used as a road base material, forming a semi-rigid base course of pure solid waste cementitious material stabilized with steel slag during construction.

[0029] In some preferred embodiments of the present invention, the mass of cementitious material accounts for 4%-6% of the mass of steel slag. When the cementitious material content is too low, the compressive strength of the resulting road base layer is low. When the cementitious material content is 4%-6%, the compressive strength of the resulting road base layer meets the requirements of the secondary road index.

[0030] In some preferred embodiments of the present invention, the water and cementitious materials are added by external admixture, wherein the steel slag particles with a diameter greater than 13.2 mm account for 20%, the particles with a diameter of 9.5-13.2 mm account for 15%, the particles with a diameter of 4.75-9.5 mm account for 25%, and the particles with a diameter less than 4.75 mm account for 40%.

[0031] In some preferred embodiments of the present invention, the steel slag is hot-quenched steel slag produced by Xinjiang Bayi Steel Plant, with a water immersion expansion of 0.42%, a crushing value of 15.4, and a needle-like / flaky content of 0.77%; the initial gradation is as follows: particles larger than 13.2 mm account for 10.38%, particles with a diameter of 9.5-13.2 mm account for 12.98%, particles with a diameter of 4.75-9.5 mm account for 25.96%, particles with a diameter of 2.36-4.75 mm account for 18.4%, particles with a diameter of 1.18-2.36 mm account for 9.85%, particles with a diameter of 0.6-1.18 mm account for 7.2%, particles with a diameter of 0.3-0.6 mm account for 5.44%, and particles with a diameter less than 0.3 mm account for 9.79%.

[0032] In some preferred embodiments of the present invention, the cementitious material comprises, by mass percentage: 73% slag, 20% carbide slag, and 7% desulfurized gypsum.

[0033] In some preferred embodiments of the present invention, the slag comprises, by mass percentage: 39%-44% calcium oxide, 28%-32% silicon dioxide, 8%-12% aluminum oxide, 0.4%-0.7% ferric oxide, 7%-10% magnesium oxide, 1%-2% sodium oxide, 0.5%-0.8% potassium oxide, and 1.5%-3.5% sulfur trioxide.

[0034] In some preferred embodiments of the present invention, the carbide slag comprises, by mass percentage: 85%-90% calcium oxide, 4%-8% silicon dioxide, 1%-3% aluminum oxide, 1%-2% ferric oxide, 0.2%-0.4% magnesium oxide, 0.3%-0.4% sodium oxide, 0.1%-0.3% potassium oxide, and 1%-2% sulfur trioxide.

[0035] In some preferred embodiments of the present invention, the desulfurized gypsum comprises, by mass percentage: 38%-43% calcium oxide, 52%-56% sulfur trioxide, 2%-4% silicon dioxide, 0.5%-1% aluminum oxide, 0.2%-0.4% ferric oxide, 0.1%-0.3% magnesium oxide, 0.5%-0.7% sodium oxide, and 0.04%-0.08% potassium oxide.

[0036] In this embodiment of the invention, the specific surface areas of the slag, carbide slag, and desulfurization gypsum used are 540 cm², respectively. 2 / g、480cm 2 / g、470cm 2 / g, the composition is shown in Table 1.

[0037] Table 1

[0038] The construction system for all-solid waste road base material of the present invention includes: a screening machine 2, several storage tanks 3, a first ball mill 5-1, a second ball mill 5-2, a third ball mill 5-3, a storage metering mixer 8, a material mixing tank 9, and a water storage tank 6; the inlet of the screening machine 2 is used to receive steel slag; the discharge ports of each screen of the screening machine 2 are connected one-to-one with the storage tanks 3, and the outlets of the storage tanks 3 are connected to the inlet of the material mixing tank 9; the inlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are respectively used to receive slag, carbide slag, and desulfurized gypsum; the outlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are all connected to the inlet of the storage metering mixer 8, and the outlet of the storage metering mixer 8 is connected to the inlet of the material mixing tank 9; the outlet of the water storage tank 6 is connected to the inlet of the material mixing tank 9.

[0039] The material mixing tank of the present invention has the functions of mixing and water feeding for material curing, and performs corresponding standardized treatment on the added steel slag and cementing materials.

[0040] In some preferred embodiments of the present invention, the screening machine includes a screening box, in which several layers of screen mesh with progressively smaller mesh sizes are arranged in sequence. Each layer of screen mesh is provided with a discharge port on the screening box, and the discharge port is connected to a spiral feeding belt. The screened steel slag is fed into the corresponding storage bin 3 by the spiral feeding belt.

[0041] Specifically, in some embodiments, the screening box contains, from top to bottom, a first layer of screens, a second layer of screens, a third layer of screens, and a collection plate. A coarse aggregate outlet is located at the lower end of the first layer of screens, a medium-coarse aggregate outlet at the lower end of the second layer of screens, a fine aggregate outlet at the lower end of the third layer of screens, and a powder outlet at the lower end of the collection plate. The aperture of the first layer of screens is 13.2 mm, the aperture of the second layer of screens is 9.5 mm, and the aperture of the third layer of screens is 4.75 mm.

[0042] In some preferred embodiments of the present invention, the top of the storage metering stirrer 8 is provided with a first inlet 81-1, a second inlet 81-2, and a third inlet 81-3; the outlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are respectively connected to the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3; the top of the storage metering stirrer 8 is provided with three baffles 82, and the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3 are all separated from each other by the baffles 82.

[0043] In a further preferred embodiment of the present invention, the storage quantitative stirrer 8 is provided with a stirrer 85 and a first storage tank 83-1, a second storage tank 83-2, and a third storage tank 83-3 respectively connected to a first inlet 81-1, a second inlet 81-2, and a third inlet 81-3. The bottom of the first storage tank 83-1, the second storage tank 83-2, and the third storage tank 83-3 is respectively provided with a first automatic weighing device 84-1, a second automatic weighing device 84-2, and a third automatic weighing device 84-3. The first automatic weighing device 84-1, the second automatic weighing device 84-2, and the third automatic weighing device 84-3 weigh the required mass of slag, carbide slag, and desulfurized gypsum and then transport the slag, carbide slag, and desulfurized gypsum into the stirrer 85. The outlet of the stirrer 85 is connected to the inlet of the slag mixing tank 9.

[0044] In a further preferred embodiment of the present invention, the first automatic weighing device 84-1 includes: a baffle plate 846, an opening and closing device 842, a first opening and closing control lever 8421-1, a second opening and closing control lever 8421-2, a discharge plate 845, a weighing sensor 844, a weighing information setting device 841, and a transfer plate 847; the baffle plate 846 is disposed at the outlet of the storage box 83, and the discharge plate 845 is disposed on the connecting channel between the outlet of the storage box 83 and the transfer plate 847; the opening and closing device 842 is connected by the first opening and closing control lever 8421-1, the second opening and closing control lever 8421-2, the first opening and closing control lever 8421-1, the second opening and closing control lever 8421-2, the second opening and closing control lever 8421-2, the third opening and closing control lever 8421-2, the fourth opening and closing control lever 8421-2, the fifth opening and closing control lever 8421-2, the sixth opening and closing control lever 8421-2, the seventh opening and closing control lever 8421-2, the eighth opening and closing control lever 8421-2, the ninth opening and closing control lever 8421-2, the eleventh ... The opening and closing control lever 8421-2 controls the opening and closing of the baffle plate 846 and the discharge plate 845 respectively; the surface of the discharge plate 845 is provided with a weighing sensor 844, the weight collected by the weighing sensor 844 is transmitted to the weighing information setting device 841, when the weighing information setting device 841 determines that the weight has reached the preset value, it controls the opening and closing device 842 to work to control the baffle plate 846 to close and the discharge plate 845 to open; the structure of the second automatic weighing device 84-2 and the third automatic weighing device 84-3 is the same as the structure of the first automatic weighing device 84-1.

[0045] In a further preferred embodiment of the present invention, each storage bin 3 is also provided with an automatic weighing device at its bottom that has the same structure as the first automatic weighing device 84-1.

[0046] The present invention discloses a construction method for a solid waste road base material, comprising: transporting steel slag to a screening machine 2 via a spiral feeder belt; screening the steel slag via the screening machine 2; transporting the steel slag particles of different grades obtained from the screening to corresponding storage bins 3 via a spiral feeder belt; transporting slag, carbide slag, and desulfurized gypsum to a first ball mill 5-1, a second ball mill 5-2, and a third ball mill 5-3 respectively via a spiral feeder belt for ball milling; and transporting the ball-milled slag, carbide slag, and desulfurized gypsum to a storage metering mixer 8 via a spiral feeder belt for further processing. The storage metering mixer 8 stores, weighs, and mixes slag, carbide slag, and desulfurized gypsum to produce the required cementitious material. The steel slag in the storage tank 3 is fed into the slag mixing tank 9 by a constant-speed feeding belt. First, it is stirred by the spiral agitator in the slag mixing tank 9. Then, the required amount of water is injected into the slag mixing tank 9 from the water storage tank 6 for slag treatment. After the slag treatment is completed, the cementitious material that has been stirred in the storage metering mixer 8 is transferred to the slag mixing tank 9 by a constant-speed feeding belt 4 for stirring to obtain the all-solid waste road base material.

[0047] Example 1 The solid waste road base material of this embodiment includes: steel slag, cementitious material accounting for 3% of the mass of steel slag, and water accounting for 7.3% of the total mass of steel slag and cementitious material; wherein, by mass percentage, the cementitious material includes: 73% slag, 20% calcium carbide slag, and 7% desulfurized gypsum.

[0048] Example 2 The solid waste road base material of this embodiment includes: steel slag, cementitious material accounting for 4% of the mass of steel slag, and water accounting for 7.6% of the total mass of steel slag and cementitious material; wherein, by mass percentage, the cementitious material includes: 73% slag, 20% calcium carbide slag, and 7% desulfurized gypsum.

[0049] Example 3 The solid waste road base material of this embodiment includes: steel slag, cementitious material accounting for 5% of the mass of steel slag, and water accounting for 8% of the total mass of steel slag and cementitious material; wherein, by mass percentage, the cementitious material includes: 73% slag, 20% calcium carbide slag, and 7% desulfurized gypsum.

[0050] Example 4 The solid waste road base material of this embodiment includes: steel slag, cementitious material accounting for 6% of the mass of steel slag, and water accounting for 8.3% of the total mass of steel slag and cementitious material; wherein, by mass percentage, the cementitious material includes: 73% slag, 20% calcium carbide slag, and 7% desulfurized gypsum.

[0051] After uniformly mixing the all-solid waste road base materials from Examples 1-4, their performance was tested according to the standard "Test Procedure for Inorganic Binder Stabilized Materials for Highway Engineering" (JTG 3441-2024). The all-solid waste road base materials were compacted in a mold (100mm × 100mm mold as per specifications) and cured for 7 days under standard conditions: curing temperature 20±2℃, curing humidity ≥95%. Experimental test blocks were obtained. Performance tests were performed on the test blocks, and the results are shown in Table 2.

[0052] Table 2

[0053] As shown in Table 1, the compressive strength of the all-solid waste road base material increases with the increase of cementitious material dosage, indicating that the cementitious material stabilized by steel slag has high efficiency and is sufficient to serve as a road base material. The 7-day strength of Examples 2-4 meets the 3MPa compressive strength standard for cement-stabilized soil base materials for Class II and below roads, while Example 1 has a lower compressive strength due to the lower cementitious material dosage. Therefore, the preferred cementitious material dosage is 4%-6%.

[0054] Example 5 like Figure 1As shown, the construction system for all-solid waste road base material of the present invention includes: a screening machine 2, several storage tanks 3, a first ball mill 5-1, a second ball mill 5-2, a third ball mill 5-3, a storage metering mixer 8, a material mixing tank 9, and a water storage tank 6; the inlet of the screening machine 2 is used to receive steel slag; the discharge ports of each screen of the screening machine 2 are connected one-to-one with the storage tanks 3, and the outlets of the storage tanks 3 are connected to the inlet of the material mixing tank 9; the inlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are respectively used to receive slag, carbide slag, and desulfurized gypsum; the outlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are all connected to the inlet of the storage metering mixer 8, and the outlet of the storage metering mixer 8 is connected to the inlet of the material mixing tank 9; the outlet of the water storage tank 6 is connected to the inlet of the material mixing tank 9.

[0055] like Figure 2 As shown, the storage and metering mixer 8 is provided with a first inlet 81-1, a second inlet 81-2, and a third inlet 81-3 at its top. The outlets of the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are connected to the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3, respectively. The storage and metering mixer 8 is provided with three baffles 82 at its top, and each pair of the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3 is separated by baffles 82. The materials from the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 are directly injected into the storage and metering mixer 8 under the operation of the spiral feed belt 1. The baffles 82 ensure that different materials do not interfere with each other when entering through the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3.

[0056] like Figure 3 As shown, the storage quantitative mixer 8 is equipped with a mixer 85 and a first storage tank 83-1, a second storage tank 83-2, and a third storage tank 83-3, which are respectively connected to the first inlet 81-1, the second inlet 81-2, and the third inlet 81-3. The bottom of the first storage tank 83-1, the second storage tank 83-2, and the third storage tank 83-3 is respectively equipped with a first automatic weighing device 84-1, a second automatic weighing device 84-2, and a third automatic weighing device 84-3. The first automatic weighing device 84-1, the second automatic weighing device 84-2, and the third automatic weighing device 84-3 weigh the required mass of slag, carbide slag, and desulfurized gypsum, and then transport the slag, carbide slag, and desulfurized gypsum into the mixer 85, where the mixer 85 mixes them. The outlet of the mixer 85 is connected to the inlet of the slag mixing tank 9.

[0057] like Figure 4As shown, the first automatic weighing device 84-1 includes: a baffle plate 846, an opening and closing device 842, a first opening and closing control lever 8421-1, a second opening and closing control lever 8421-2, a discharge plate 845, a weighing sensor 844, a weighing information setting device 841, and a transfer plate 847. The baffle plate 846 is located at the outlet of the storage box 83. The opening and closing device 842 controls the opening and closing of the baffle plate 846 through the first opening and closing control lever 8421-1 to seal and open the first storage box 83-1. The material passes through the baffle plate 846 and enters above the discharge plate 845. A discharge plate 845 is installed on the connecting channel between the outlet of the storage bin 83 and the transfer plate 847. An opening and closing device 842 controls the opening and closing of the discharge plate 845 via a second opening and closing control lever 8421-2. A weighing sensor 844 is installed on the surface of the discharge plate 845. The weighing sensor 844 measures the weight of the material on the discharge plate 845 and transmits the measurement to a weighing information setting device 841. When the weighing information setting device 841 determines that the weight has reached a preset value, it controls the opening and closing device 842 to close the baffle plate 846 and open the discharge plate 845, sending the material through the transfer plate 847 into the mixer 85. The structures of the second automatic weighing device 84-2 and the third automatic weighing device 84-3 are the same as those of the first automatic weighing device 84-1. Each storage bin 3 also has an automatic weighing device with the same structure as the first automatic weighing device 84-1 at its bottom.

[0058] The water storage tank 6 is connected to the mixing tank 9 via a pumping device 7. The pumping device includes a pump and a water delivery pipe, and a speed controller 10 is installed on the water delivery pipe. Each spiral feeding belt 1 is equipped with a frequency converter.

[0059] The specific construction process in this embodiment is as follows: Steel slag from the warehouse is transported to the screening machine 2 via the spiral feeder 1 according to experimental requirements. The steel slag is then screened by the screening machine 2 according to specific experimental requirements, and the different gradations of the screened particles are separated and poured out in layers. These layers are then transported to the corresponding storage bins 3 via the spiral feeder 1. Slag, carbide slag, and desulfurized gypsum are transported to the first ball mill 5-1, the second ball mill 5-2, and the third ball mill 5-3 respectively via the spiral feeder 1. They are ground to the appropriate fineness according to experimental requirements and then transported to the storage and quantitative stirring device 8 via the spiral feeder 1. The mixer 8 performs corresponding storage, weighing, and mixing to prepare the required cementitious material. The steel slag is fed into the slag mixing tank 9 according to the specifications via the constant-speed feeding belt 4. First, it is mixed by the spiral mixer in the slag mixing tank 9. Then, the required amount of water is injected into the slag mixing tank 9 through the water storage tank 6, the water pumping device 7, and the water injection rate controller 10 for slag treatment. After the slag treatment is completed, the cementitious material that has been mixed in the quantitative mixer 8 is uniformly transferred to the slag mixing tank 9 via the constant-speed feeding belt 4 for mixing of steel slag and cementitious material. After completion, it is taken out from the bottom of the slag mixing tank 9.

[0060] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A solid waste road base material, characterized in that, It includes steel slag, cementitious materials accounting for 3%-6% of the mass of steel slag, and water accounting for 7%-9% of the total mass of steel slag and cementitious materials; the cementitious materials, by mass percentage, include: 70%-76% slag, 17%-23% calcium carbide slag, and 4%-10% desulfurized gypsum.

2. The all-solid-waste road base material according to claim 1, characterized in that, The cementing material comprises, by weight percentage: 73% slag, 20% carbide slag, and 7% desulfurized gypsum.

3. The all-solid-waste road base material according to claim 1, characterized in that, The slag comprises, by mass percentage: 39%-44% calcium oxide, 28%-32% silicon dioxide, 8%-12% aluminum oxide, 0.4%-0.7% ferric oxide, 7%-10% magnesium oxide, 1%-2% sodium oxide, 0.5%-0.8% potassium oxide, and 1.5%-3.5% sulfur trioxide.

4. The all-solid-waste road base material according to claim 1, characterized in that, The carbide slag comprises, by mass percentage: 85%-90% calcium oxide, 4%-8% silicon dioxide, 1%-3% aluminum oxide, 1%-2% ferric oxide, 0.2%-0.4% magnesium oxide, 0.3%-0.4% sodium oxide, 0.1%-0.3% potassium oxide, and 1%-2% sulfur trioxide.

5. The all-solid-waste road base material according to claim 1, characterized in that, The desulfurized gypsum comprises, by mass percentage: 38%-43% calcium oxide, 52%-56% sulfur trioxide, 2%-4% silicon dioxide, 0.5%-1% aluminum oxide, 0.2%-0.4% ferric oxide, 0.1%-0.3% magnesium oxide, 0.5%-0.7% sodium oxide, and 0.04%-0.08% potassium oxide.

6. A construction system for a solid waste road base material according to any one of claims 1-5, characterized in that, include: Screening machine (2), several storage tanks (3), first ball mill (51), second ball mill (52), third ball mill (53), storage quantitative stirrer (8), material mixing tank (9) and water storage tank (6); The inlet of the screening machine (2) is used to receive steel slag; the discharge port of each screen of the screening machine (2) is connected to the storage tank (3) one by one, and the outlet of the storage tank (3) is connected to the inlet of the slag mixing tank (9); the inlet of the first ball mill (51), the inlet of the second ball mill (52) and the inlet of the third ball mill (53) are used to receive slag, carbide slag and desulfurized gypsum respectively; the outlet of the first ball mill (51), the outlet of the second ball mill (52) and the outlet of the third ball mill (53) are all connected to the inlet of the storage quantitative agitator (8), and the outlet of the storage quantitative agitator (8) is connected to the inlet of the slag mixing tank (9); the outlet of the water storage tank (6) is connected to the inlet of the slag mixing tank (9).

7. The construction system for all-solid-waste road base materials according to claim 6, characterized in that, The storage metering stirrer (8) is provided with a first inlet (811), a second inlet (812) and a third inlet (813) at the top; the outlet of the first ball mill (51), the outlet of the second ball mill (52) and the outlet of the third ball mill (53) are respectively connected to the first inlet (811), the second inlet (812) and the third inlet (813); the storage metering stirrer (8) is provided with three baffles (82) at the top, and the first inlet (811), the second inlet (812) and the third inlet (813) are separated from each other by the baffles (82).

8. The construction system for all-solid-waste road base materials according to claim 7, characterized in that, The storage metering mixer (8) is equipped with a mixer (85) and a first storage tank (831), a second storage tank (832), and a third storage tank (833) connected to the first inlet (811), the second inlet (812), and the third inlet (813), respectively. The bottom of the first storage tank (831), the second storage tank (832), and the third storage tank (833) is equipped with a first automatic weighing device (841), a second automatic weighing device (842), and a third automatic weighing device (843), respectively. The first automatic weighing device (841), the second automatic weighing device (842), and the third automatic weighing device (843) weigh the required mass of slag, carbide slag, and desulfurized gypsum, and then transport the slag, carbide slag, and desulfurized gypsum into the mixer (85). The outlet of the mixer (85) is connected to the inlet of the slag mixing tank (9).

9. The construction system for all-solid-waste road base materials according to claim 8, characterized in that, The first automatic weighing device (841) includes: a baffle plate (846), an opening and closing device (842), a first opening and closing control lever (84211), a second opening and closing control lever (84212), a discharge plate (845), a weighing sensor (844), a weighing information setting device (841), and a transfer plate (847); the baffle plate (846) is located at the outlet of the storage box (83), and the discharge plate (845) is located on the connecting channel between the outlet of the storage box (83) and the transfer plate (847); the opening and closing device (842) is connected by the first opening and closing control lever (84211) and the second opening and closing control lever. (84212) Control the opening and closing of the baffle plate (846) and the discharge plate (845) respectively; the surface of the discharge plate (845) is provided with a weighing sensor (844), the weight collected by the weighing sensor (844) is transmitted to the weighing information setter (841), when the weighing information setter (841) determines that the weight reaches the preset value, it controls the opening and closing device (842) to work to control the baffle plate (846) to close and the discharge plate (845) to open; the structure of the second automatic weighing device (842) and the third automatic weighing device (843) is the same as the structure of the first automatic weighing device (841).

10. A construction method for a solid waste road base material, characterized in that, The construction system based on claim 6 includes: transporting steel slag to a screening machine (2) via a spiral feeder belt, screening the steel slag via the screening machine (2), and transporting the steel slag particles of different grades obtained by screening to corresponding storage bins (3) via a spiral feeder belt; transporting slag, carbide slag and desulfurized gypsum to a first ball mill (51), a second ball mill (52) and a third ball mill (53) respectively via a spiral feeder belt for ball milling; and transporting the ball-milled slag, carbide slag and desulfurized gypsum to a storage quantitative agitator (8) via a spiral feeder belt for storage quantitative agitator. The mixer (8) stores, weighs, and mixes slag, carbide slag, and desulfurized gypsum to produce the required cementitious material. The steel slag in the storage tank (3) is fed into the slag mixing tank (9) by a constant speed feeding belt. The slag is first mixed by the spiral agitator in the slag mixing tank (9). Then, the required mass of water is injected into the slag mixing tank (9) from the water storage tank (6) and slag is treated. After the slag treatment is completed, the cementitious material that has been mixed in the storage quantitative agitator (8) is transferred to the slag mixing tank (9) by a constant speed feeding belt (4) for mixing to obtain the solid waste road base material.

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