Process and device for preparing electromagnetic shielding concrete material by using copper smelting slag

Abstract

The invention belongs to the technical field of concrete production equipment, and particularly relates to a process and device for preparing an electromagnetic shielding concrete material by using copper smelting slag, residual calcium oxide in the copper smelting slag is eliminated by using acid, chemical excitation is performed on the copper smelting slag, and the gelling activity of the copper smelting slag is improved; the electromagnetic shielding coarse aggregate and the modified electromagnetic shielding powder are used for preparing the concrete material, the electromagnetic shielding coarse aggregate and the modified electromagnetic shielding powder have the electromagnetic shielding effect, and the electromagnetic shielding coarse aggregate and the modified electromagnetic shielding powder have the electromagnetic shielding effect, so that the electromagnetic shielding coarse aggregate and the modified electromagnetic shielding powder have the electromagnetic shielding effect. On one hand, an electromagnetic shielding weak area caused by the aggregate can be eliminated, and on the other hand, the modified electromagnetic shielding powder distributed in the cement matrix among the aggregate enables the matrix to have a good electromagnetic shielding function, so that the electromagnetic shielding capability of the concrete material is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of concrete production equipment, specifically a process and apparatus for preparing electromagnetic shielding concrete materials using copper smelting slag. Background Technology

[0002] Copper smelting slag, a solid waste generated during copper ore smelting, has a low resource utilization rate, resulting in a large and continuously increasing stockpile in my country. How to achieve efficient disposal and high-value utilization of this type of copper-based solid waste has become a crucial issue for the sustainable development of the industry.

[0003] In the process of exploring the resource utilization of copper smelting slag, it has been found in related technologies that copper smelting slag can be used as one of the production materials for electromagnetic shielding concrete. This not only helps to explore high-value utilization ways of this type of solid waste, but also helps to alleviate the environmental problems caused by solid waste accumulation.

[0004] However, practical exploration has revealed two main issues. First, the electromagnetic shielding effect of copper smelting slag itself is not ideal, and adding it to concrete does not provide adequate electromagnetic shielding. Second, traditional electromagnetic shielding concrete primarily achieves its shielding effect through the addition of electromagnetic shielding components to the matrix. This can lead to the aggregate, which occupies a large portion of the concrete volume, becoming a weak point easily penetrated by electromagnetic waves. Even if the electromagnetic shielding effect of copper smelting slag is improved, the presence of aggregate still limits the concrete's shielding ability. Furthermore, the dosage of electromagnetic shielding components is a crucial factor influencing the electromagnetic shielding ability of concrete. However, the current problem is that as the dosage increases, the mechanical strength of the concrete tends to decrease. Even when the dosage fails to achieve the expected electromagnetic shielding ability, the mechanical properties have already significantly decreased, limiting the amount of electromagnetic shielding components that can be incorporated into the concrete, thus limiting its overall electromagnetic shielding capability.

[0005] In view of this, the present invention proposes a process and apparatus for preparing electromagnetic shielding concrete materials using copper smelting slag, in order to solve the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a process and apparatus for preparing electromagnetic shielding concrete materials using copper smelting slag.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A process for preparing electromagnetic shielding concrete material using copper smelting slag, as described in this invention, includes the following steps:

[0008] S1: Place copper smelting slag powder with a fineness of 200-500 mesh into a 10% ferric sulfate or ferrous sulfate solution at a ratio of 1g:10-20ml and ultrasonically treat for 2-4 hours to obtain pre-modified copper smelting slag powder for later use.

[0009] S2: The pre-modified copper smelting slag powder is reduced in a reducing atmosphere at 820-900℃ for 60-90 minutes, and the product is placed in concentrated sulfuric acid and stirred for 5-10 minutes. After completion, the obtained solid is neutralized with alkali solution and then dried to obtain modified electromagnetic shielding powder for later use.

[0010] S3: Modified electromagnetic shielding powder, silicate cement and water are placed in a multi-layer granulation mechanism. During the rotation of the granulation disc, multi-layer granulation is carried out in cooperation with the receiving and transfer parts and the screening plate. The resulting particles are naturally cured. After completion, electromagnetic shielding coarse aggregate is obtained for later use.

[0011] S4: Using cement, sand, fine aggregate, electromagnetic shielding coarse aggregate, modified electromagnetic shielding powder, fiber, and water-reducing agent as raw materials, mix them and add water to mix evenly to obtain electromagnetic shielding concrete material.

[0012] Preferably, the multi-layer granulation mechanism in S3 manufactures multi-layer coated particles, and the multi-layer granulation mechanism includes a granulation disc, a separator ring, a receiving and transferring component, a sieve plate, and a controllable nozzle;

[0013] The granulation disc is installed at an angle, the granulation disc is externally connected to a rotary motor, and the surface of the granulation disc is provided with a circular groove.

[0014] The partition ring is fixedly installed in the circular groove, and the multiple partition rings are all concentrically arranged with the circular groove, dividing the circular groove into multiple granulation chambers;

[0015] The receiving and transferring component is fixedly installed by a bracket. The receiving and transferring component extends to the inner wall of the granulation chamber and is clearance-fitted with the bottom wall of the granulation chamber. A drainage channel is provided on the receiving and transferring component, which is used to guide the particles into the adjacent granulation chamber.

[0016] The sieve plate is embedded in the drainage channel and is used to sieve the particulate matter in the drainage channel.

[0017] The controllable nozzle is connected to an external water supply device, and the controllable nozzle is used to spray water mist into the granulation chamber.

[0018] Preferably, a flow divider is hingedly installed in the flow channel, with the end of the flow divider located above the sieve plate, and the flow divider is used to limit the flow rate of particles on the sieve plate.

[0019] Preferably, the receiving and transmitting component consists of a fixed end and a hinged end. The fixed end is located outside the granulation chamber, and the hinged end is hinged to the fixed end. The hinged end extends obliquely into the granulation chamber. A cam is rotatably mounted on the hinged end inside the granulation chamber, and the cam is driven by friction with the bottom wall of the granulation chamber.

[0020] Preferably, a symmetrically arranged vibrating plate is fixedly installed at the bottom of the fixed end. A circulation groove is formed on the vibrating plate, and a ball is slidably installed in the circulation groove. A pull rod is hingedly installed on the hinged end, and a lifting groove matching the ball is formed on the pull rod. The pull rod extends into the circulation groove, which is divided into a ring-shaped lifting section, an impact section, and a return section. The pull rod reciprocates along the lifting section, and during the reciprocating motion, it pushes the ball from the bottom end of the lifting section to the top end of the lifting section.

[0021] Preferably, it also includes a rubbing and reinforcing component, which is installed on the receiving and transferring component and is used to rub and reinforce the sieved particles.

[0022] The rubbing and reinforcing assembly includes a rubbing roller;

[0023] The receiving and transferring component is provided with a rubbing groove, which is connected to the middle of the flow channel. The rubbing roller is rotatably installed in the rubbing groove and is externally driven by a motor.

[0024] The surface of the grinding roller is provided with uniformly distributed filling holes. The grinding groove is fitted with the circumferential surface of the grinding roller with a clearance, and the clearance between the grinding groove and the grinding roller gradually decreases along the movement trajectory of the particles.

[0025] Preferably, a partition plate is installed in the rubbing groove, the partition plate is located above the rubbing roller, and elastic bands are fixedly installed at both ends of the partition plate. The ends of the elastic bands away from the partition plate are fixedly installed between two adjacent drainage channels. The partition plate, together with the elastic bands, divides the rubbing roller into multiple segments.

[0026] Preferably, a distribution rod is fixedly installed on the receiving and transferring component, and all the partition plates are slidably installed on the distribution rod. A hydraulic telescopic rod is fixedly installed between two adjacent partition plates. A gravity groove is opened between the drainage channel and the grinding groove. A pressure plate is hingedly installed in the gravity groove. A spring telescopic component is fixedly installed in the gravity groove below the pressure plate. The spring telescopic component corresponds to and is conductively connected to the hydraulic telescopic rod.

[0027] Preferably, the edge of the pressure plate is elastically connected to the top opening of the gravity groove in a closed manner through an elastic membrane.

[0028] An apparatus for preparing electromagnetic shielding concrete material using copper smelting slag includes a multi-layer granulation mechanism and an installation frame. A rotary motor is fixedly installed on the installation frame, a granulation disc is rotatably installed on the installation frame, a support is fixedly installed on the installation frame, and a discharge pipe is also fixedly installed on the installation frame. The discharge pipe is connected to a flow channel at the end of the particle movement trajectory.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. The present invention discloses a process and apparatus for preparing electromagnetic shielding concrete material using copper smelting slag. This process utilizes acid removal to eliminate residual calcium oxide in the copper smelting slag and chemical activation to enhance its gelling activity. This allows the copper smelting slag to form a gel structure under the action of silicate cement during the preparation of the electromagnetic shielding coarse aggregate, resulting in high-strength electromagnetic shielding coarse aggregate. Furthermore, the present invention uses the electromagnetic shielding coarse aggregate and modified electromagnetic shielding powder to prepare the concrete material. Since both materials possess electromagnetic shielding properties, this helps eliminate weak areas in the electromagnetic shielding caused by the aggregate. Additionally, the modified electromagnetic shielding powder distributed in the cement matrix between the aggregates gives the matrix good electromagnetic shielding capabilities, thereby improving the electromagnetic shielding ability of the concrete material.

[0031] 2. The process and apparatus for preparing electromagnetic shielding concrete material using copper smelting slag described in this invention, when using modified electromagnetic shielding powder to blend with cement to manufacture electromagnetic shielding coarse aggregate, a multi-layer granulation mechanism is set up, resulting in a multi-layered cross-section of the electromagnetic shielding coarse aggregate. By artificially adjusting the content of modified electromagnetic shielding powder in different layers of coarse aggregate, particles with a continuous conductive network in the middle layer are produced. This not only reduces the loss rate of modified electromagnetic shielding powder during the subsequent curing and transportation of the particles, but also enhances the reflection and absorption mechanism of the prepared electromagnetic shielding coarse aggregate. When the electromagnetic shielding coarse aggregate is added to the concrete together with the modified electromagnetic shielding powder, it can effectively eliminate the weak areas of electromagnetic shielding caused by the aggregate. Attached Figure Description

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Figure 1 This is a perspective view of the present invention;

[0034] Figure 2 This is a perspective view of the invention from another angle;

[0035] Figure 3 It is a three-dimensional view of the receiving and transferring parts;

[0036] Figure 4 It is a three-dimensional view of the receiving and transferring component from another perspective;

[0037] Figure 5 This is a diagram of the internal structure of the receiving and transferring component;

[0038] Figure 6 It is a three-dimensional assembly view of the distribution rod and the partition plate;

[0039] Figure 7 It is a 3D view of the assembly of the vibrating plate and the tie rod;

[0040] Figure 8 It is a 3D diagram of the pull rod;

[0041] Figure 9 It is a sectional view of the receiving and transferring component;

[0042] Figure 10 yes Figure 9 A magnified view of a section at point A in the middle;

[0043] Figure 11 This is a process flow diagram of the present invention.

[0044] In the diagram: 1. Granulation disc; 11. Separating ring; 12. Granulation chamber; 2. Fixed end; 21. Hinge end; 22. Drainage channel; 23. Screen plate; 24. Diverter plate; 25. Cam; 26. Vibrating plate; 27. Circulation trough; 28. Ball bearing; 29. ​​Tie rod; 2A. Lifting groove; 3. Crushing trough; 31. Crushing roller; 4. Separator plate; 41. Elastic band; 42. Distribution rod; 43. Hydraulic telescopic rod; 5. Gravity trough; 51. Pressure plate; 52. Spring telescopic component; 53. Elastic membrane; 6. Mounting frame; 61. Rotary motor; 62. Support; 63. Discharge pipe; 64. Controllable nozzle. Detailed Implementation

[0045] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0046] like Figures 1 to 11 As shown, the process for preparing electromagnetic shielding concrete material using copper smelting slag according to the present invention includes the following steps:

[0047] S1: Place copper smelting slag powder with a fineness of 200-500 mesh into a 10% ferric sulfate or ferrous sulfate solution at a ratio of 1g:10-20ml and ultrasonically treat for 2-4 hours to obtain pre-modified copper smelting slag powder for later use.

[0048] Ultrasonic treatment can reduce the content of free calcium oxide in copper smelting slag and improve volume stability.

[0049] S2: The pre-modified copper smelting slag powder is reduced in a reducing atmosphere at 820-900℃ for 60-90 minutes, and the product is placed in concentrated sulfuric acid and stirred for 5-10 minutes. After completion, the obtained solid is neutralized with alkali solution and then dried to obtain modified electromagnetic shielding powder for later use.

[0050] S3: The modified electromagnetic shielding powder, silicate cement and water are placed in a multi-layer granulation mechanism. During the rotation of the granulation disc 1, multi-layer granulation is carried out in cooperation with the receiving and transfer component and the screening plate. The resulting particles are naturally cured. After completion, electromagnetic shielding coarse aggregate is obtained for later use.

[0051] S4: Using cement, sand, fine aggregate, electromagnetic shielding coarse aggregate, modified electromagnetic shielding powder, fiber, and water-reducing agent as raw materials, mix them and add water to mix evenly to obtain electromagnetic shielding concrete material.

[0052] The alkaline solution in S2 is preferably one or more of sodium hydroxide solution, sodium carbonate solution, and sodium bicarbonate solution;

[0053] The preferred weight ratio of the modified electromagnetic shielding powder, silicate cement, and water in S3 is 94-100:20-28:16-21.

[0054] The natural curing time in S3 is preferably 21 to 28 days, and the particle size of the electromagnetic shielding coarse aggregate is preferably 10 to 20 mm.

[0055] The preferred weight ratio of cement, river sand, electromagnetic shielding coarse aggregate, modified electromagnetic shielding powder, fiber, water-reducing agent, and mixing water in S4 is 60-75:80-100:125-170:11-16:5-7:0.9-1.5:24-32.

[0056] The fiber described in S4 is preferably one or more of organic fibers (such as polyethylene fiber, polypropylene fiber, etc.) and inorganic fibers (such as basalt fiber, steel fiber, etc.), and the fiber length is preferably 5 to 20 mm.

[0057] The water-reducing agent is preferably at least one of polycarboxylate water-reducing agent, sodium lignosulfonate water-reducing agent, calcium lignosulfonate water-reducing agent, etc.

[0058] This invention first treats copper smelting slag with ferric sulfate or ferrous sulfate solution, converting free calcium oxide in the slag into calcium hydroxide, and then into calcium sulfate and ferric hydroxide. This not only helps reduce the content of free calcium oxide in the slag, preventing it from expanding in concrete materials and causing cracks and reduced mechanical strength, but also solidifies the iron provided by ferric sulfate or ferrous sulfate into the copper smelting slag.

[0059] Furthermore, the present invention performs a reduction treatment on the pre-modified copper smelting slag obtained by the above treatment, thereby reducing the iron oxide carried by the copper smelting slag itself and the iron oxide obtained by the decomposition of the iron hydroxide during the reduction treatment into elemental iron, and converting the copper smelting slag into a material with electromagnetic shielding function.

[0060] Furthermore, this invention treats the material with concentrated sulfuric acid to form a magnetite passivation layer on the surface of the iron. This not only effectively prevents the formation of iron oxide and loss of electromagnetic shielding effect during subsequent oxidation processes and in the preparation of concrete materials, but also ensures that the magnetite retains its electromagnetic shielding properties. Simultaneously, the above treatment process also achieves the removal of residual calcium oxide in the copper smelting slag using acid and chemical activation of the slag, increasing its gelling activity. This allows the copper smelting slag to form a gel structure under the action of silicate cement during the preparation of the electromagnetic shielding coarse aggregate, resulting in a high-strength electromagnetic shielding coarse aggregate.

[0061] Finally, the present invention uses the electromagnetic shielding coarse aggregate and modified electromagnetic shielding powder to prepare concrete materials. Since both have electromagnetic shielding effects, on the one hand, it helps to eliminate the weak areas of electromagnetic shielding caused by the aggregate, and on the other hand, the modified electromagnetic shielding powder distributed in the cement matrix between the aggregates enables the matrix to also have good electromagnetic shielding function, thereby improving the electromagnetic shielding capability of the concrete material.

[0062] Meanwhile, during the preparation of concrete materials, the modified electromagnetic shielding powder can utilize the calcium hydroxide produced by cement hydration to generate cementitious components such as hydrated calcium silicate, thereby effectively avoiding the adverse effects of traditional electromagnetic shielding components such as carbon powder and graphite powder on the mechanical properties of concrete materials.

[0063] The multi-layer granulation mechanism described in S3 manufactures multi-layer coated particles. The multi-layer granulation mechanism includes a granulation disc 1, a separating ring 11, a receiving and transferring component, a sieve plate 23, and a controllable nozzle 64.

[0064] The granulation disc 1 is installed at an angle, and the granulation disc 1 is externally connected to a rotary motor 61. A circular groove is formed on the surface of the granulation disc 1.

[0065] The partition ring 11 is fixedly installed in the circular groove, and the plurality of partition rings 11 are all concentrically arranged with the circular groove, and the plurality of partition rings 11 divide the circular groove into a plurality of granulation chambers 12;

[0066] The receiving and transferring component is fixedly installed by the bracket 62. The receiving and transferring component extends to the inner wall of the granulation chamber 12 and is clearance-fitted with the bottom wall of the granulation chamber 12. The receiving and transferring component is provided with a drainage channel 22, which is used to guide the particles into the adjacent granulation chamber 12.

[0067] The sieve plate 23 is embedded in the flow channel 22, and the sieve plate 23 is used to sieve the particles in the flow channel 22;

[0068] The controllable nozzle 64 is connected to an external water supply device, and the controllable nozzle 64 is used to spray water mist into the granulation chamber 12.

[0069] In the production of electromagnetic shielding coarse aggregate in S3, in order to further optimize the distribution of modified electromagnetic shielding powder in the particles, a multi-layer granulation mechanism is set in this invention. During the granulation process, silicate cement and modified electromagnetic shielding powder are added to different granulation chambers 12 after being mixed in proportion. After granulation, the particles are split open to present a multi-layer structure, and most of the modified electromagnetic shielding powder is concentrated in the middle layer of the particles. This ensures the electromagnetic shielding effect of the electromagnetic shielding coarse aggregate while reducing the degree of loss of modified electromagnetic shielding powder in the particles during natural curing.

[0070] Specifically, during actual granulation, silicate cement and modified electromagnetic shielding powder are mixed in a weight ratio to form two or more powdered materials with varying levels of modified electromagnetic shielding powder content. During granulation, the powdered materials are added in small amounts multiple times to different granulation chambers 12. Based on the movement trajectory of the particles in the multiple granulation chambers 12, the granulation chambers 12 at the front and rear of the particle movement trajectory have a lower content of modified electromagnetic shielding powder, while those in the middle of the particle movement trajectory have a higher content. Therefore, when the granulation disc 1 is driven by the rotary motor 61, the powdered materials move through the different granulation chambers 12... As the granulation disc 1 continues to rotate, water is sprayed from the controllable nozzle 64 located at the forefront of the particle's trajectory. Under the adhesive effect of the water, the powdery material in the granulation chamber 12 gradually clumps together and gradually forms particles through mutual collision and friction. As the granulation disc 1 continues to rotate, some particles, under the action of inertial force, pass through the gap between the receiving and transferring component and the granulation chamber 12 and fall under the action of gravity, where they are received by the receiving and transferring component. The particles roll along the receiving and transferring component, and when they pass through the sieve plate 23, particles that do not meet the specifications fall into the current granulation chamber through the holes of the sieve plate 23. 12. The granules that meet the standards enter the next granulation chamber 12 under the continuous movement of the guide channel 22. When the granules enter, the controllable nozzle 64 in the corresponding granulation chamber 12 sprays water mist. Under the adhesive effect of the water mist, the outer layer of the granules continues to coat the powdery material, and under the action of the receiving and transfer component, it moves along the preset motion trajectory. When the granules enter the receiving and transfer component for screening after passing through the last granulation chamber 12, the complete granules can be output. At this time, due to multiple adhesions, the cross-section of the granules is multi-layered, and the modified electromagnetic shielding powder in the granulation chamber 12 located in the middle of the motion trajectory... The high proportion of modified electromagnetic shielding powder results in the concentration of the powder in the middle layer of the complete particles. During subsequent natural curing, when the particles are subjected to external forces such as collision and friction, the surface powder will be shed. Due to the low content of modified electromagnetic shielding powder on the surface, the loss rate of the powder is reduced. At the same time, since the modified electromagnetic shielding powder is concentrated in the middle layer of the particles, with the total amount of modified electromagnetic shielding powder added remaining unchanged, compared with the uniform dispersion of modified electromagnetic shielding powder in coarse aggregate, the more concentrated distribution of modified electromagnetic shielding powder forms a continuous conductive network in the middle layer of the electromagnetic shielding coarse aggregate, enhancing the reflection and absorption mechanism of electromagnetic shielding.

[0071] In this invention, when using modified electromagnetic shielding powder to blend with cement to manufacture electromagnetic shielding coarse aggregate, a multi-layer granulation mechanism is set up, resulting in a multi-layered cross-section of the electromagnetic shielding coarse aggregate. By artificially adjusting the content of modified electromagnetic shielding powder in different layers of coarse aggregate, particles with a continuous conductive network in the middle layer are produced. This not only reduces the loss rate of modified electromagnetic shielding powder during the subsequent curing and transportation of the particles, but also enhances the reflection and absorption mechanisms of the resulting electromagnetic shielding coarse aggregate. When the electromagnetic shielding coarse aggregate is added to concrete together with the modified electromagnetic shielding powder, it can effectively eliminate weak areas in electromagnetic shielding caused by the aggregate.

[0072] In a preferred embodiment of the present invention, a flow divider 24 is hingedly installed in the flow channel 22. The end of the flow divider 24 is located above the sieve plate 23. The flow divider 24 is used to limit the flow rate of particles on the sieve plate 23, so that the particles are dispersed on the sieve plate 23, thereby reducing the probability that particles with a diameter smaller than the specified size will pass through the sieve plate 23.

[0073] The receiving and transmitting component consists of a fixed end 2 and a hinged end 21. The fixed end 2 is located outside the granulation chamber 12, and the hinged end 21 is hingedly mounted on the fixed end 2. The hinged end 21 extends obliquely into the granulation chamber 12. A cam 25 is rotatably mounted on the hinged end 21 inside the granulation chamber 12, and the cam 25 is driven by friction with the bottom wall of the granulation chamber 12.

[0074] A symmetrically arranged vibrating plate 26 is fixedly installed at the bottom of the fixed end 2. A circulation groove 27 is opened on the vibrating plate 26. A ball bearing 28 is slidably installed in the circulation groove 27. A pull rod 29 is hingedly installed on the hinge end 21. A lifting groove 2A matching the ball bearing 28 is opened on the pull rod 29. The pull rod 29 extends into the circulation groove 27. The circulation groove 27 is divided into a ring-shaped lifting section, an impact section and a return section. The pull rod 29 reciprocates along the lifting section and pushes the ball bearing 28 from the bottom end of the lifting section to the top end of the lifting section during the reciprocating motion.

[0075] To further enhance the screening effect of particles moving in multiple granulation chambers 12, in this embodiment, when the granulation disc 1 rotates, the frictional transmission between the granulation disc 1 and the cam 25 on the hinge end 21 causes the cam 25 to rotate continuously. This causes the hinge end 21 to periodically rise and fall away from the fixed end 2. The rising and falling action not only causes the gap between the hinge end 21 and the bottom wall of the granulation chamber 12 to change periodically, but also periodically pushes and pulls the pull rod 29. When the gap between the hinge end 21 and the bottom wall of the granulation chamber 12 increases, the tilt angle of the hinge end 21 relative to the horizontal plane increases, which enhances the sliding effect of the particles on the hinge end 21 towards the fixed end 2. At the same time, the particles in the granulation chamber 12 move from the increased gap to above the receiving and transferring member, and under the action of gravity, continuously fall onto the receiving and transferring member. As the material flows along the drainage channel 22, and the hinged end 21 periodically pushes and pulls the pull rod 29, when the middle of the pull rod 29 is at the end of the lifting section, the ball bearing 28, guided by the inclined return section, also moves to the end of the lifting section and rolls into the lifting groove 2A. When the pull rod 29 is pulled by the hinged end 21, the pull rod 29 pushes the ball bearing 28 up along the lifting section. After reaching the top of the lifting section, the ball bearing 28 descends vertically to the impact section. After colliding with the bottom of the impact section, it rolls again from the return section to the bottom of the lifting section. Under the impact effect of the ball bearing 28 and the bottom of the impact section, the vibrating plate 26 vibrates. Since the vibrating plate 26 is fixedly connected to the bottom of the fixed end 2, the regular vibration enhances the flow effect of the particles in the drainage channel 22 on the fixed end 2, which, in conjunction with the diversion plate 24, enhances the screening effect of the screen plate 23 on the particles.

[0076] As a preferred embodiment of the present invention, it further includes a rubbing and reinforcing component, which is installed on the receiving and transferring component and is used to rub and reinforce the sieved particles.

[0077] The rubbing and reinforcing assembly includes a rubbing roller 31;

[0078] The receiving and transmitting component is provided with a rubbing groove 3, which is connected to the middle of the flow channel 22. The rubbing roller 31 is rotatably installed in the rubbing groove 3, and the rubbing roller 31 is externally connected to a drive motor.

[0079] The surface of the rubbing roller 31 is provided with uniformly distributed filling holes. The rubbing groove 3 is in clearance fit with the circumferential surface of the rubbing roller 31, and the gap between the rubbing groove 3 and the rubbing roller 31 gradually decreases along the movement trajectory of the particles.

[0080] To further enhance the compactness and shape regularity of the particles, in this invention, when the particles flow along the flow channel 22, the particle flow enters the grinding groove 3 from the middle of the flow channel 22 and is intercepted by the grinding roller 31. During the continuous rotation of the grinding roller 31, the intercepted particles enter the filling hole and follow the movement of the grinding roller 31. As the grinding roller 31 continues to rotate, the gap between the grinding roller 31 and the grinding groove 3 gradually decreases along the movement trajectory of the particles, thus exerting a compressive effect on the particles. Combined with the friction generated between the particles and the grinding groove 3 when the particles follow the movement of the grinding roller 31, the particles roll, making the shape of the particles more regular.

[0081] This invention, by setting up a rubbing and reinforcing component, first sorts the particles through the filling holes on the rubbing roller 31 during the movement of the particles. During the movement, in conjunction with the change in the gap of the rubbing groove 3, the particles are squeezed and rubbed, making the particles more compact and more regular in shape under the action of external force, and the final produced particles have a more uniform particle size distribution.

[0082] In a preferred embodiment of the present invention, a partition plate 4 is installed in the rubbing groove 3. The partition plate 4 is located above the rubbing roller 31. An elastic band 41 is fixedly installed at both ends of the partition plate 4. The end of the elastic band 41 away from the partition plate 4 is fixedly installed between two adjacent drainage channels 22. The partition plate 4, together with the elastic band 41, divides the rubbing roller 31 into multiple segments.

[0083] A distribution rod 42 is fixedly installed on the receiving and transferring component. All partition plates 4 are slidably installed on the distribution rod 42. A hydraulic telescopic rod 43 is fixedly installed between two adjacent partition plates 4. A gravity groove 5 is opened between the drainage channel 22 and the grinding groove 3. A pressure plate 51 is hingedly installed in the gravity groove 5. A spring telescopic component 52 is fixedly installed in the gravity groove 5 below the pressure plate 51. The spring telescopic component 52 corresponds one-to-one with the hydraulic telescopic rod 43 and is electrically connected.

[0084] The edge of the pressure plate 51 is elastically connected to the top opening of the gravity groove 5 via an elastic membrane 53.

[0085] Because the output of particles flowing into the drainage channel 22 from multiple granulation chambers 12 is not uniform during the granulation process, in order to improve the granulation crushing efficiency, in this invention, the multiple pressure plates 51 are not compressed in the initial state. At this time, the distribution plates are evenly distributed on the crushing rollers 31. As the particles gradually move onto the pressure plates 51, when the rate at which the particles flow into the pressure plates 51 is greater than the processing efficiency of the crushing rollers 31 of the corresponding section, the pressure of the corresponding pressure plates 51 on the spring telescopic members 52 increases as the weight of the particles continues to increase. Since the spring telescopic members 52 are connected to the corresponding hydraulic telescopic rods 43 and are filled with hydraulic oil, the multiple hydraulic telescopic rods 43 have a tendency to extend. However, since the multiple hydraulic telescopic rods 43 are coaxially arranged... Between multiple partition plates 4, the position of the partition plates 4 will change according to the weight of the particles on the pressure plate 51. That is, the more severe the accumulation of particles on the pressure plate 51, the greater the extension force of the corresponding hydraulic telescopic rod 43. After pushing the distribution plate to move, the length of the corresponding rubbing roller 31 will be greater, thereby improving the processing efficiency of the rubbing roller 31 in the flow channel 22. Correspondingly, the processing efficiency of the rubbing roller 31 will be less adaptable in the flow channel 22 corresponding to the pressure plate 51 with lighter accumulation. In practical applications, the processing efficiency of the rubbing roller 31 can be adjusted in real time according to the accumulation of particles, which can effectively alleviate the accumulation of particles in the gravity tank 5, especially when the output particles from multiple granulation chambers 12 are significantly different.

[0086] It should be noted that although the movement trajectory of the particles output by the rubbing roller 31 changes when the partition plate 4 is adjusted, that is, the particles may cross a granulation chamber 12 or repeatedly enter a granulation chamber 12, in actual applications, the total proportion of particles output by this phenomenon is relatively small. In addition, in actual applications, in order to further reduce the impact of this phenomenon, the number of granulation chambers 12 can be increased to reduce the impact of this phenomenon on the final product.

[0087] An apparatus for preparing electromagnetic shielding concrete material using copper smelting slag includes a multi-layer granulation mechanism and a mounting frame 6. A rotary motor 61 is fixedly mounted on the mounting frame 6, a granulation disc 1 is rotatably mounted on the mounting frame 6, a support 62 is fixedly mounted on the mounting frame 6, and a discharge pipe 63 is also fixedly mounted on the mounting frame 6. The discharge pipe 63 is conductively connected to a flow channel 22 at the end of the particle movement trajectory.

[0088] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for preparing electromagnetic shielding concrete material using copper smelting slag, characterized in that, Includes the following steps: S1: Place copper smelting slag powder with a fineness of 200-500 mesh into a 10% ferric sulfate or ferrous sulfate solution at a ratio of 1g:10-20ml and ultrasonically treat for 2-4 hours to obtain pre-modified copper smelting slag powder for later use. S2: The pre-modified copper smelting slag powder is reduced in a reducing atmosphere at 820-900℃ for 60-90 minutes, and the product is placed in concentrated sulfuric acid and stirred for 5-10 minutes. After completion, the obtained solid is neutralized with alkali solution and then dried to obtain modified electromagnetic shielding powder for later use. S3: The modified electromagnetic shielding powder, silicate cement and water are placed in the multi-layer granulation mechanism. During the rotation of the granulation disc (1), multi-layer granulation is carried out in cooperation with the receiving and transfer parts and the screening plate. The obtained particles are naturally cured. After completion, electromagnetic shielding coarse aggregate is obtained for later use. S4: Using cement, sand, fine aggregate, electromagnetic shielding coarse aggregate, modified electromagnetic shielding powder, fiber, and water-reducing agent as raw materials, mix them and add water to mix evenly to obtain electromagnetic shielding concrete material.

2. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 1, characterized in that: The multi-layer granulation mechanism described in S3 manufactures multi-layer coated particles. The multi-layer granulation mechanism includes a granulation disc (1), a separating ring (11), a receiving and transferring component, a sieve plate (23), and a controllable nozzle (64). The granulation disc (1) is installed at an angle, and the granulation disc (1) is connected to a rotary motor (61). The surface of the granulation disc (1) is provided with a circular groove. The partition ring (11) is fixedly installed in the circular groove. The multiple partition rings (11) are all concentrically arranged with the circular groove, and the multiple partition rings (11) divide the circular groove into multiple granulation chambers (12). The receiving and transferring component is fixedly installed by a bracket (62). The receiving and transferring component extends to the inner wall of the granulation chamber (12) and is clearance-fitted with the bottom wall of the granulation chamber (12). A drainage channel (22) is provided on the receiving and transferring component. The drainage channel (22) is used to guide the particles into the adjacent granulation chamber (12). The sieve plate (23) is embedded in the flow channel (22) and is used to screen the particles in the flow channel (22); The controllable nozzle (64) is connected to an external water supply device, and the controllable nozzle (64) is used to spray water mist into the granulation chamber (12).

3. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 2, characterized in that: A flow divider plate (24) is hinged inside the flow channel (22). The end of the flow divider plate (24) is located above the sieve plate (23). The flow divider plate (24) is used to limit the flow rate of particles on the sieve plate (23).

4. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 3, characterized in that: The receiving and transmitting component consists of a fixed end (2) and a hinged end (21). The fixed end (2) is located outside the granulation chamber (12). The hinged end (21) is hinged to the fixed end (2). The hinged end (21) extends obliquely into the granulation chamber (12). A cam (25) is rotatably installed on the hinged end (21) inside the granulation chamber (12). The cam (25) is driven by friction with the bottom wall of the granulation chamber (12).

5. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 4, characterized in that: The bottom of the fixed end (2) is fixedly installed with symmetrically arranged vibration plates (26). The vibration plates (26) are provided with circulation grooves (27). Balls (28) are slidably installed in the circulation grooves (27). A pull rod (29) is hingedly installed on the hinge end (21). A lifting groove (2A) matching the ball (28) is provided on the pull rod (29). The pull rod (29) extends into the circulation groove (27). The circulation groove (27) is divided into a ring-shaped lifting section, an impact section and a return section. The pull rod (29) moves back and forth along the lifting section. During the back and forth movement, it pushes the ball (28) from the bottom of the lifting section to the top of the lifting section.

6. A process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 2 or 5, characterized in that: It also includes a rubbing and reinforcing component, which is installed on the receiving and transferring component and is used to rub and reinforce the sieved particles. The rubbing and strengthening assembly includes a rubbing roller (31). The receiving and transferring component is provided with a rubbing groove (3), and the rubbing groove (3) is connected to the middle of the diversion channel (22). The rubbing roller (31) is rotatably installed in the rubbing groove (3). The rubbing roller (31) is an I-shaped structure. The rubbing roller (31) is externally connected to a drive motor. The surface of the rubbing roller (31) is provided with uniformly distributed filling holes. The rubbing groove (3) is in clearance fit with the circumferential surface of the rubbing roller (31), and the gap between the rubbing groove (3) and the rubbing roller (31) gradually decreases along the movement trajectory of the particles.

7. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 6, characterized in that: A partition plate (4) is installed inside the rubbing groove (3). The partition plate (4) is located above the rubbing roller (31). An elastic band (41) is fixedly installed at both ends of the partition plate (4). The end of the elastic band (41) away from the partition plate (4) is fixedly installed between two adjacent drainage channels (22). The partition plate (4) works with the elastic band (41) to divide the rubbing roller (31) into multiple segments.

8. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 7, characterized in that: A distribution rod (42) is fixedly installed on the receiving and transferring component. All the partition plates (4) are slidably installed on the distribution rod (42). A hydraulic telescopic rod (43) is fixedly installed between two adjacent partition plates (4). A gravity groove (5) is opened between the drainage channel (22) and the grinding groove (3). A pressure plate (51) is hinged in the gravity groove (5). A spring telescopic component (52) is fixedly installed in the gravity groove (5) below the pressure plate (51). The spring telescopic component (52) corresponds to the hydraulic telescopic rod (43) and is connected in a conductive manner.

9. The process for preparing electromagnetic shielding concrete material using copper smelting slag according to claim 8, characterized in that: The edge of the pressure plate (51) is elastically connected to the top opening of the gravity groove (5) through an elastic membrane (53).

10. An apparatus for preparing electromagnetic shielding concrete material using copper smelting slag, characterized in that: The device includes the multi-layer granulation mechanism as described in claim 9, and also includes a mounting frame (6). The rotary motor (61) is fixedly mounted on the mounting frame (6), the granulation disc (1) is rotatably mounted on the mounting frame (6), the bracket (62) is fixedly mounted on the mounting frame (6), and a discharge pipe (63) is also fixedly mounted on the mounting frame (6). The discharge pipe (63) is connected to the flow channel (22) at the end of the particle movement trajectory.

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