A low-carbon calcined cement process using carbide slag to replace limestone clinker

Abstract

The present invention discloses a low-carbon calcined cement process using carbide slag to replace limestone clinker, and the present invention relates to the technical field of low-carbon calcined cement processing. The low-carbon calcined cement using carbide slag to replace limestone clinker is completed by the cooperation of a processing table, a step-by-step crushing mechanism, a screening reflux mechanism, a self-turning drying mechanism and a linkage driving mechanism. The upper end surface of the processing table is equipped with a step-by-step crushing mechanism for multi-step crushing of the waste carbide slag to gradually reduce the particle size. The secondary rolling and squeezing assembly includes a top spring fixedly connected between the rolled plate and the bottom box cavity wall. The present invention realizes seamless connection between the crushing and drying of the carbide slag through the combination of the step-by-step crushing mechanism and the self-turning drying mechanism, improves the processing speed, reduces dust, and utilizes the combination of the primary crushing and secondary crushing assemblies and the misaligned crushing of the trapezoidal crushing plate and the rolled plate to apply complex stress, increase the force direction, effectively process hard particles, and ensure the uniformity of the carbide slag.

Description

Technical Field

[0001] The invention relates to the technical field of low-carbon calcined cement processing, in particular to a low-carbon calcined cement process using carbide slag to replace limestone clinker. Background Art

[0002] As an important process in the cement industry, limestone clinker calcining technology generally uses limestone as the main raw material. However, this traditional technology has significant problems of high energy consumption and large emissions, which is not conducive to environmental protection and sustainable development. As industrial waste, the accumulation of carbide slag not only occupies land resources, but also may cause secondary pollution to the environment. With the improvement of environmental protection awareness and technological advancement, people have begun to explore how to reuse carbide slag as a valuable resource. Among them, using carbide slag to replace limestone for cement clinker production is the most important research method at present. It not only helps to reduce the impact of industrial waste on the environment, but also reduces the carbon emissions of cement production. At the same time, it realizes the resource utilization of carbide slag, reduces the emission of industrial waste, and promotes the green development and low-carbon transformation of the building materials industry. At present, the low-carbon calcined cement process that uses carbide slag to replace limestone clinker mainly includes crushing and drying, screening treatment, batching and mixing, raw material preparation, calcination treatment and cooling storage. Among them, crushing and drying is one of the most important steps.

[0003] Traditional crushing and drying are usually carried out separately in different processing equipment. Therefore, the separate steps require the transfer of materials between different equipment, which affects the overall processing speed of crushing and drying. In addition, the long-distance transfer and transportation process will also cause a large amount of dust to fly.

[0004] In addition, the existing crushing method is usually mechanical crushing by a jaw crusher, but this crushing method is relatively simple, it is difficult to ensure the uniformity of the particles after crushing, and it is also easy for some calcium carbide slag to be incompletely crushed.

[0005] Summary of the invention

[0006] The present invention provides a low-carbon calcined cement process using carbide slag instead of limestone clinker, which solves the problem that the traditional crushing and drying processes are usually carried out separately in different equipment, which leads to the long-distance transfer of materials between equipment, not only affecting the overall processing speed, but also generating a large amount of dust. At the same time, the existing jaw crusher has a relatively single crushing mode, which makes it difficult to ensure the uniformity of particles, and is prone to the technical problem that some carbide slag is not completely crushed.

[0007] The present invention provides a low-carbon calcined cement process using carbide slag to replace limestone clinker. The specific steps of the low-carbon calcined cement process using carbide slag to replace limestone clinker are as follows:

[0008] S1. Crushing and drying: The waste carbide slag is crushed and dried through the step-by-step crushing mechanism and the self-turning drying mechanism.

[0009] S2. Screening treatment: The crushed and dried carbide slag particles are screened and the carbide slag particles of different particle sizes are classified to ensure the uniformity of the carbide slag after mixing with limestone.

[0010] S3. Mixing ingredients: Mix the carbide slag particles with the required raw materials evenly.

[0011] S4. Raw material preparation: The mixed raw materials are sent to the raw material mill for fine grinding to prepare raw materials suitable for calcination.

[0012] S5. Calcination treatment: The raw material is sent to a rotary kiln or a vertical kiln for high-temperature calcination to generate cement clinker. Since carbide slag already contains a certain proportion of CaO, the energy consumption in this process will be relatively low.

[0013] S6. Cooling and storage: The calcined cement clinker is cooled and stored, waiting for further processing into finished cement.

[0014] The low-carbon calcined cement process steps of using carbide slag to replace limestone clinker in the above steps S1-S6 need to be completed by the cooperation of a processing table, a step-by-step crushing mechanism, a screening and reflux mechanism, a self-turning drying mechanism and a linkage driving mechanism.

[0015] The upper end surface of the processing platform is equipped with a step-by-step crushing mechanism for performing multi-stage crushing on the waste carbide slag to gradually reduce the particle size; the upper part of the processing platform is equipped with a screening reflux mechanism which is sleeved on the outside of the step-by-step crushing mechanism and is used to screen the crushed waste carbide slag and re-feed the screened waste carbide slag into the step-by-step crushing mechanism for re-crushing; a self-turning drying mechanism is installed on the upper end surface of the processing platform and directly below the screening reflux mechanism; a linkage driving mechanism is commonly arranged between the step-by-step crushing mechanism, the self-turning drying mechanism and the processing platform; the step-by-step crushing mechanism includes a bottom box which is fixedly connected to the upper end surface of the processing platform by a fixing rod and is opened at the top and the bottom, and a placing device which is fixedly connected to the upper part of the bottom box by a connecting rod. A hopper, a primary crushing assembly arranged between the discharge hopper and the bottom box for primary crushing of waste carbide slag, a secondary grinding assembly arranged on the bottom box for further crushing of the waste carbide slag, and a material receiving unit arranged between the secondary grinding assembly and the bottom box. A connecting tube is fixed on the upper part of the bottom box. The secondary grinding assembly includes a bearing ring fixedly connected to the upper end surface of the processing table by a connecting strip and located on the rear side of the bottom box, a strip slide slidably connected to the bearing ring, a trapezoidal crushing plate fixedly connected to the front end surface of the strip slide and slidingly connected in the bottom box, a crushed plate hinged on the side cavity wall of the bottom box by a lug plate for cooperating with the trapezoidal crushing plate, and a top spring fixedly connected between the crushed plate and the cavity wall of the bottom box.

[0016] In a possible implementation, the primary crushing assembly includes a lower ring rotatably connected to the upper port of the connecting cylinder and an upper ring rotatably connected to the lower part of the discharge hopper, the upper ring and the lower ring are rotatably connected to each other, a plurality of bearing rods are equidistantly fixedly connected to the circumferential inner wall of the lower ring, and a plurality of extrusion rod groups are equidistantly fixedly connected to the circumferential inner wall of the upper ring, the extrusion rod group consists of a plurality of single rods arranged along the circumferential direction of the upper ring and also along the axial direction of the upper ring, and a reversing linkage member for driving the upper ring and the lower ring to run in opposite directions is commonly provided between the upper ring and the lower ring.

[0017] In one possible implementation, the reversing linkage includes a No. 1 gear ring fixedly connected to the outside of the lower ring, a No. 2 gear ring fixedly connected to the outside of the upper ring, an end face gear rotatably connected to the connecting rod located on the right part through a rotating column and meshing with the No. 1 gear ring and the No. 2 gear ring, and a spur rack fixedly connected to the upper end surface of the bar skateboard through an L-shaped rod and meshing with the No. 1 gear ring.

[0018] In one possible implementation, the material receiving unit includes a slide groove opened on the lower end surface of the strip slide, a slider slidably connected in the slide groove, a limit spring fixedly connected between the slider and the slide groove, a fixing strip fixedly connected to the lower end surface of the slider, and a material receiving plate fixedly connected to the front end surface of the fixing strip and slidingly connected through the bottom box and located below the trapezoidal crushing plate.

[0019] In a possible implementation, the upper surface of the lug plate is fixedly connected to an inclined material guide plate via a connecting column, and the inclined material guide plate is in an inclined state with a side closer to the rolled plate being lower and a side farther from the rolled plate being higher.

[0020] In one possible implementation, the screening reflux mechanism includes a bracket fixedly connected to the upper end surface of the processing table, an annular screen drum rotatably connected in the bracket, a plurality of paddle plates fixedly connected to the circumferential inner wall of the annular screen drum at circumferentially equidistant intervals, two annular sills fixedly connected to the inner wall of the annular screen drum symmetrically front and back, and a scraping assembly jointly arranged between the processing table and the annular sill for scraping off material adhered to the inner wall of the annular screen drum.

[0021] In one possible implementation, the self-turning drying mechanism includes a swinging assembly arranged on the processing table, an arc-shaped drying plate slidably arranged on the swinging assembly and located directly below the annular screen drum, a plurality of inclined material-discharging plates fixedly connected to the arc-shaped inner wall of the arc-shaped drying plate at equal distances along the arc direction and axial direction of the arc-shaped drying plate, and a stop plate fixedly connected to the left side of the inclined material-discharging plate, and the two adjacent rows of inclined material-discharging plates are arranged in a staggered manner.

[0022] In a possible implementation, the linkage driving mechanism includes a No. 1 transmission shaft, a driving shaft and a No. 2 transmission shaft. The upper end surface of the processing table is fixedly connected with a vertical plate, the vertical plate is rotatably connected with the driving shaft, the upper end surface of the processing table is fixedly connected with a front support plate, the front support plate is rotatably connected with the No. 1 transmission shaft, the upper end surface of the processing table is fixedly connected with a rear support plate, the rear support plate is rotatably connected with the No. 2 transmission shaft, the No. 2 transmission shaft and the driving shaft are mutually connected through a No. 1 bevel gear set, the lower end of the No. 2 transmission shaft is fixedly connected with a pull rod, the pull rod and the bar slide are hinged to each other through a connecting rod, the No. 1 transmission shaft and the driving shaft are mutually connected through a No. 2 bevel gear set, the rear end surface of the arc drying plate is fixedly connected with an arc rack. The lower end of the No. 1 transmission shaft is fixedly connected with an incomplete gear meshing with the arc rack.

[0023] In one possible implementation, the scraping assembly includes a plurality of sliding rods equidistantly spaced around the periphery and slidably connected to an annular sill at the front, an arc-shaped scraper fixedly connected to the rear end of the sliding rod and in contact with the inner wall of the annular screen drum, a return spring fixedly connected between the sliding rod and the annular screen drum, and a wedge-shaped extrusion plate fixedly connected to the end surface of the processing table via a support rod for cooperating with the sliding rod.

[0024] In a possible implementation, the swing assembly includes an arc frame fixedly connected to the upper end surface of the processing table through a support, the arc drying plate is slidably connected to the arc frame, and a return spring is fixedly connected between the arc frame and the arc drying plate.

[0025] It can be seen from the above technical solutions that the present invention has the following advantages:

[0026] In the present invention, through the combination of the step-by-step crushing mechanism and the self-turning drying mechanism, the calcium carbide slag can be crushed and dried in succession in a seamless manner, the movement of materials during the transfer process is reduced, the overall processing speed is significantly improved, and the dust flying is also reduced. Crushing and drying can be integrated and complement each other, thereby ensuring that the material is evenly processed during the crushing and drying process.

[0027] In the present invention, the particle size of the carbide slag can be gradually crushed and reduced by the combination of a primary crushing component and a secondary crushing component, and then the carbide slag is squeezed and crushed by a trapezoidal crushing plate and a rolled plate, and the two are offset and crushed with each other, so that more complex stress is applied to the carbide slag, and the force direction and force points of the material are increased, so that it is further offset and crushed on the basis of extrusion and crushing, so as to achieve more detailed particle size control, make the crushing method more diverse and effective, can effectively process the harder particles in the carbide slag, reduce the uncrushed large particles that may be left under the traditional extrusion method, and ensure the overall uniformity of the carbide slag after crushing.

[0028] In the present invention, the crushed carbide slag is screened through a screening reflux mechanism, and the material with a larger particle size is re-put into the step-by-step crushing mechanism. The screening can accurately classify the material, ensure the consistency of the particle size of the finally crushed carbide slag, and further improve the overall uniformity of the crushed carbide slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 The present invention provides a low-carbon calcined cement process diagram using carbide slag to replace limestone clinker.

[0031] Figure 2 The present invention provides an overall structural diagram.

[0032] Figure 3 This is a schematic diagram of the rear view of the overall structure provided by the present invention.

[0033] Figure 4 This is a schematic diagram of the connection structure of the step-by-step crushing mechanism and the linkage driving mechanism provided by the present invention.

[0034] Figure 5 This is a schematic cross-sectional structure diagram of the linkage driving mechanism provided by the present invention.

[0035] Figure 6 This is a schematic diagram of the splitting of the lower ring and upper ring connection structure provided by the present invention.

[0036] Figure 7 A schematic cross-sectional view of the installation structure of the secondary rolling assembly provided by the present invention.

[0037] Figure 8 This is a schematic diagram of the installation structure of the material receiving unit provided by the present invention.

[0038] Fig. 9 This is a schematic diagram of the structure of the screening reflux mechanism provided by the present invention.

[0039] Fig.10 The present invention provides Fig. 9 Schematic diagram of the enlarged structure of part A in the figure.

[0040] Fig.11 This is a schematic diagram of the structure of the self-turning drying mechanism provided by the present invention from a rear view perspective.

[0041] The above drawings include the following reference numerals:

[0042] 1. Processing table; 2. Step-by-step crushing mechanism; 21. Bottom box; 22. Discharging hopper; 23. Primary crushing assembly; 231. Lower ring; 232. Upper ring; 233. Bearing rod; 234. Extrusion rod group; 235. Reversing linkage; 2351. No. 1 gear ring; 2352. No. 2 gear ring; 2353. End gear; 2354. Straight rack; 24. Secondary crushing assembly; 241. Bearing ring; 242. Strip slide; 243. Trapezoidal crushing plate; 244. Rolled plate; 245. Top spring; 25. Material receiving unit; 251. Slide; 252. Sliding block; 253. Limiting spring; 254. Fixing bar; 255. Material receiving plate; 3. Screening reflux machine Structure; 31. Bracket; 32. Annular screen drum; 33. Toggle plate; 34. Annular retaining sill; 35. Scraping assembly; 351. Sliding rod; 352. Arc scraper; 353. Return spring; 354. Wedge-shaped extrusion plate; 4. Self-turning drying mechanism; 41. Swinging assembly; 411. Arc frame; 412. Return spring; 42. Arc drying plate; 43. Oblique material-dispensing plate; 44. Stop plate; 5. Linkage driving mechanism; 51. Drive shaft; 52. No. 1 transmission shaft; 53. No. 2 transmission shaft; 54. No. 1 bevel gear set; 55. Pull rod; 56. Connecting rod; 57. No. 2 bevel gear set; 58. Arc rack; 59. Incomplete gear; 6. Oblique material guide plate. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0044] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a technical solution: a low-carbon calcined cement process using carbide slag to replace limestone clinker. The specific steps of the low-carbon calcined cement process using carbide slag to replace limestone clinker are as follows:

[0045] S1, crushing and drying: the waste carbide slag is crushed and dried by the step-by-step crushing mechanism 2 and the self-turning drying mechanism 4.

[0046] S2. Screening treatment: The crushed and dried carbide slag particles are screened and the carbide slag particles of different particle sizes are classified to ensure the uniformity of the carbide slag after mixing with limestone.

[0047] S3. Mixing ingredients: Mix the carbide slag particles with the required raw materials evenly.

[0048] S4. Raw material preparation: The mixed raw materials are sent to the raw material mill for fine grinding to prepare raw materials suitable for calcination.

[0049] S5. Calcination treatment: The raw material is sent to a rotary kiln or a vertical kiln for high-temperature calcination to generate cement clinker. Since carbide slag already contains a certain proportion of CaO, the energy consumption in this process will be relatively low.

[0050] S6. Cooling and storage: The calcined cement clinker is cooled and stored, waiting for further processing into finished cement.

[0051] The low-carbon calcined cement process steps of using carbide slag to replace limestone clinker in the above steps S1-S6 need to be completed by the processing table 1, the step-by-step crushing mechanism 2, the screening and reflux mechanism 3, the self-turning drying mechanism 4 and the linkage driving mechanism 5.

[0052] A step-by-step crushing mechanism 2 for performing multi-stage crushing on waste carbide slag to gradually reduce the particle size is installed on the upper end surface of the processing table 1. A screening reflux mechanism 3 is installed on the upper part of the processing table 1 and is sleeved on the outside of the step-by-step crushing mechanism 2 for screening the crushed waste carbide slag and re-feeding the screened waste carbide slag into the step-by-step crushing mechanism 2 for re-crushing. A self-turning drying mechanism 4 is installed on the upper end surface of the processing table 1 and directly below the screening reflux mechanism 3. A linkage driving mechanism 5 is commonly arranged between the step-by-step crushing mechanism 2, the self-turning drying mechanism 4 and the processing table 1.

[0053] See also Figure 4 and Figure 5 In this embodiment, the step-by-step crushing mechanism 2 includes a bottom box 21 which is fixedly connected to the upper end surface of the processing table 1 by a fixing rod and has upper and lower openings, a discharge hopper 22 which is fixedly connected to the upper part of the bottom box 21 by a connecting rod, a primary crushing assembly 23 arranged between the discharge hopper 22 and the bottom box 21 for primary crushing of the waste carbide slag, a secondary grinding assembly 24 arranged on the bottom box 21 for further crushing the waste carbide slag, and a material receiving unit 25 arranged between the secondary grinding assembly 24 and the bottom box 21, and a connecting tube is fixed on the upper part of the bottom box 21.

[0054] See also Figure 5 and Figure 7The secondary crushing assembly 24 includes a carrying ring 241 fixedly connected to the upper end surface of the processing table 1 through a connecting strip and located on the rear side of the bottom box 21, a strip slide 242 slidably connected to the carrying ring 241, a trapezoidal crushing plate 243 fixedly connected to the front end surface of the strip slide 242 and slidingly connected in the bottom box 21, a crushed plate 244 hinged to the side cavity wall of the bottom box 21 through a lug plate for cooperating with the trapezoidal crushing plate 243, and a top spring 245 fixedly connected between the crushed plate 244 and the cavity wall of the bottom box 21, and an inclined material guide plate 6 is fixedly connected to the upper end surface of the lug plate through a connecting column, and the inclined material guide plate 6 is in an inclined state with a side lower than that close to the crushed plate 244 and a side higher than that away from the crushed plate 244.

[0055] See also Figure 4 , Figure 5 and Figure 6 The primary crushing assembly 23 includes a lower ring 231 rotatably connected to the upper port of the connecting tube and an upper ring 232 rotatably connected to the lower part of the discharge hopper 22. The upper ring 232 and the lower ring 231 are rotatably connected to each other. A plurality of bearing rods 233 are fixedly connected to the inner wall of the circumference of the lower ring 231 at equal intervals in the circumferential direction. A plurality of extrusion rod groups 234 are fixedly connected to the inner wall of the circumference of the upper ring 232 at equal intervals in the circumferential direction. The extrusion rod group 234 consists of a plurality of single rods arranged obliquely. A plurality of extrusion rod groups 234 are provided between the upper ring 232 and the lower ring 231 for driving the crushed materials. The reversing linkage 235 makes the upper ring 232 and the lower ring 231 run in opposite directions. The reversing linkage 235 includes a No. 1 ring gear 2351 fixedly connected to the outside of the lower ring 231, a No. 2 ring gear 2352 fixedly connected to the outside of the upper ring 232, an end gear 2353 rotatably connected to the connecting rod located on the right through a rotating column and meshing with the No. 1 ring gear 2351 and the No. 2 ring gear 2352, and a spur rack 2354 fixedly connected to the upper end surface of the bar slide 242 through an L-shaped rod and meshing with the No. 1 ring gear 2351.

[0056] See also Figure 7 and Figure 8 The material receiving unit 25 includes a slide groove 251 opened on the lower end surface of the strip slide plate 242, a slider 252 slidably connected in the slide groove 251, a limit spring 253 fixedly connected between the slider 252 and the slide groove 251, a fixing bar 254 fixedly connected to the lower end surface of the slider 252, and a material receiving plate 255 fixedly connected to the front end surface of the fixing bar 254 and slidingly connected to the bottom box 21 and located below the trapezoidal crushing plate 243.

[0057] See also Figure 4The linkage driving mechanism 5 includes a driving shaft 51 and a second transmission shaft 53. A vertical plate is fixedly connected to the upper end surface of the processing table 1, and the driving shaft 51 is rotatably connected to the vertical plate. A rear support plate is fixedly connected to the upper end surface of the processing table 1, and the second transmission shaft 53 is rotatably connected to the rear support plate. The second transmission shaft 53 and the driving shaft 51 are connected to each other through a first bevel gear set 54. A pull rod 55 is fixedly connected to the lower end of the second transmission shaft 53, and the pull rod 55 and the strip slide 242 are hinged to each other through a connecting rod 56.

[0058] First, the linkage driving mechanism 5 is controlled to operate: the driving shaft 51 is controlled to rotate and then the No. 2 transmission shaft 53 is driven to rotate through the No. 1 bevel gear set 54, and the No. 2 transmission shaft 53 then drives the pull rod 55 to rotate, and during the rotation of the pull rod 55, the bar slide 242 is driven to reciprocate back and forth through the connecting rod 56; the bar slide 242 then drives the spur rack 2354 to reciprocate back and forth through the L-shaped rod, and during the reciprocating movement of the spur rack 2354, the No. 1 gear ring 2351 meshing with it is driven to reciprocate, and the No. 1 gear ring 2351 then drives the lower ring 231 to reciprocate, and at the same time, the No. 1 gear ring 2351 will also be driven by the L-shaped rod. The end face gear 2353 drives the second gear ring 2352 to rotate reciprocatingly, and the second gear ring 2352 then drives the upper ring 232 to rotate reciprocatingly. The rotation directions of the upper ring 232 and the lower ring 231 are always opposite. The upper ring 232 and the lower ring 231 then respectively drive the extrusion rod group 234 and the bearing rod 233 to rotate, and then the waste calcium carbide slag is put into the discharge hopper 22. The waste calcium carbide slag then enters the position of the upper ring 232, and then falls onto the bearing rod 233. The waste calcium carbide slag is squeezed and crushed by the mutual staggered movement of the inclined single rod in the extrusion rod group 234 and the bearing rod 233.

[0059] The discarded calcium carbide slag after the primary crushing then falls downward into the bottom box 21, and then flows between the trapezoidal crushing plate 243 and the crushed plate 244 under the action of the inclined guide plate 6. When the strip slide 242 moves forward, it drives the receiving plate 255 forward through the limit spring 253, the slider 252 and the fixed strip 254 until the receiving plate 255 moves forward to abut against the front cavity wall of the bottom box 21, so that the discarded calcium carbide slag falling downward into the bottom box 21 can temporarily fall on the receiving plate 255, and then the strip slide 242 continues to move forward, so that the slider 252 slides in the chute 251, the limit spring 253 is gradually stretched, and the strip slide 242 that continues to move forward pushes the trapezoidal crushing plate 243 to move forward. Then, the waste carbide slag falling on the receiving plate 255 is pushed to move, and the waste carbide slag is pushed to the rolling plate 244 for extrusion and crushing. Then, the rolling plate 244 is extruded and pushed by the trapezoidal crushing plate 243 to rotate around the lug plate, thereby causing a misalignment between the trapezoidal crushing plate 243 and the rolling plate 244. This can apply more complex stress to the carbide slag, increase the force direction and force point of the material, and make it further dislocated and crushed on the basis of extrusion and crushing, so as to achieve more detailed particle size control, effectively process the harder particles in the carbide slag, reduce the unbroken large particles that may be left under the traditional extrusion method, ensure the overall uniformity of the material, and at the same time, the dislocation and crushing also reduces high-energy collisions, thereby reducing the generation of dust.

[0060] When the strip slide 242 moves backward, it will drive the trapezoidal crushing plate 243 to move backward and away from the crushed plate 244. After moving to a certain distance, the spur rack 2354 will be driven to separate from the No. 1 gear ring 2351, so that the first-stage crushing assembly 23 will temporarily stop working. At this time, the slide 251 is driven to move backward to a position where its front groove wall conflicts with the slider 252. Then the slider 252 is pulled backward by the strip slide 242. The slider 252 then drives the receiving plate 255 to move backward through the fixed bar 254. Then the crushed waste carbide slag can be discharged from the opening at the bottom of the bottom box 21. When the strip slide 242 starts to move forward again, the above steps will be repeated to crush the waste carbide slag again.

[0061] See also Figure 2 , Fig. 9 and Fig.10In this embodiment, the screening reflux mechanism 3 includes a bracket 31 fixedly connected to the upper end surface of the processing table 1, an annular screen drum 32 rotatably connected to the bracket 31, a plurality of toggle plates 33 fixedly connected to the inner wall of the annular screen drum 32 at equidistant intervals in the circumference, two annular sills 34 symmetrically fixedly connected to the inner wall of the annular screen drum 32 in the front and rear directions, and a scraping assembly 35 commonly arranged between the processing table 1 and the annular sill 34 for scraping off materials adhered to the inner wall of the annular screen drum 32. The scraping assembly 35 includes a plurality of sliding rods 351 equidistantly penetrated and slidably connected to the annular sill 34 located at the front, an arc-shaped scraper 352 fixedly connected to the rear end of the sliding rod 351 and in contact with the inner wall of the annular screen drum 32, a return spring 353 fixedly connected between the sliding rod 351 and the annular screen drum 32, and a wedge-shaped extrusion plate 354 fixedly connected to the upper end surface of the processing table 1 through a support rod for cooperating with the sliding rod 351.

[0062] The waste carbide slag crushed by the step-by-step crushing mechanism 2 falls downward into the annular screen drum 32, and then the annular screen drum 32 is driven to rotate by an external driving device. During the rotation of the annular screen drum 32, the waste carbide slag that has fallen into it and been crushed is driven to turn over to screen the waste carbide slag. Those with qualified sizes will pass through the annular screen drum 32 and be screened downward, while those with larger sizes will be intercepted by the annular screen drum 32. The annular screen drum 32 drives the toggle plate 33 to rotate synchronously, and the toggle plate 33 then drives the larger-sized waste carbide slag that has been screened and intercepted to rotate with the annular screen drum 32. When being driven to the upper position of the annular drum, the waste carbide slag will fall from the toggle plate 33 under the action of gravity, and then fall into the discharge hopper 22 again, so that the waste carbide slag that has not been completely crushed can be crushed again.

[0063] When the annular screen drum 32 rotates, it will also drive the sliding bar 351 to rotate synchronously. When the sliding bar 351 rotates to conflict with the wedge-shaped extrusion plate 354, the sliding bar 351 will be squeezed backward by the inclined surface of the wedge-shaped extrusion plate 354, and then drive the arc scraper 352 to move backward. The arc scraper 352 moves along the inner wall of the annular screen drum 32 to scrape off some of the waste calcium carbide slag with high humidity attached to the inner wall of the annular screen drum 32. When the sliding bar 351 rotates to separate from the wedge-shaped extrusion plate 354, it will be driven forward to return to the initial position under the reset action of the reset spring 353. The sliding bar 351 moves forward and drives the arc scraper 352 to move forward, and the waste calcium carbide slag on the annular screen drum 32 can be scraped off again.

[0064] See also Figure 3 and Fig.11In this embodiment, the self-turning drying mechanism 4 includes a swinging assembly 41 arranged on the processing table 1, an arc-shaped drying plate 42 slidably arranged on the swinging assembly 41 and located directly below the annular screen drum 32, a plurality of inclined material-dispensing plates 43 fixedly connected to the arc-shaped inner wall of the arc-shaped drying plate 42 at equal distances along the arc direction and axial direction of the arc-shaped drying plate 42, and a stopper plate 44 fixedly connected to the left side of the inclined material-dispensing plate 43, and the two adjacent rows of inclined material-dispensing plates 43 are arranged in a staggered shape, and the swinging assembly 41 includes an arc-shaped frame 411 fixedly connected to the upper end surface of the processing table 1 through a pillar, and the arc-shaped drying plate 42 is slidably connected in the arc-shaped frame 411, and a return spring 412 is fixedly connected between the arc-shaped frame 411 and the arc-shaped drying plate 42.

[0065] See also Fig.11 The linkage driving mechanism 5 also includes a No. 1 transmission shaft 52. The upper end surface of the processing table 1 is fixedly connected to a front support plate, which is rotatably connected to the No. 1 transmission shaft 52. The No. 1 transmission shaft 52 and the driving shaft 51 are mutually connected through a No. 2 bevel gear set 57. The rear end surface of the arc drying plate 42 is fixedly connected to an arc rack 58. The lower end of the No. 1 transmission shaft 52 is fixedly connected to an incomplete gear 59 meshing with the arc rack 58.

[0066] The screened waste carbide slag falls downward onto the arc drying plate 42, and then the arc drying plate 42 is controlled to heat up. The driving shaft 51 rotates and at the same time drives the No. 1 transmission shaft 52 to rotate through the No. 2 bevel gear set 57. The No. 1 transmission shaft 52 then drives the incomplete gear 59 to rotate. When the incomplete gear 59 is meshed with the arc rack 58, the arc drying plate 42 is driven to slide in the arc frame 411 through the arc rack 58. During this process, the return spring 412 will be driven to deform. When the incomplete gear 59 rotates to a position where its toothless part is meshed with the arc rack 58, the return spring 412 will reset and drive the arc drying plate 42 to slide in the opposite direction in the arc frame 411. When the incomplete gear 59 rotates to mesh with the arc rack 58 again, the arc drying plate 42 will be driven to slide again, and the intermittent meshing and separation of the incomplete gear 59 and the arc rack 58 drive the arc drying plate 42 to swing back and forth.

[0067] When the arc drying plate 42 slides in the counterclockwise direction during its reciprocating swing, the waste carbide slag on the arc plate will be pushed forward by the inclined downward direction of the inclined material shifting plate 43, and when the arc drying plate 42 switches to clockwise rotation, the waste carbide slag will be blocked by the stop plate 44, so that most of the waste carbide slag rotates synchronously with the arc drying plate 42, so that the waste carbide slag can be intermittently rolled forward, and the reciprocating swing of the arc drying plate 42 can also make the waste carbide slag automatically flipped, thereby ensuring that the waste carbide slag is evenly heated and can be thoroughly dried.

[0068] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-carbon calcined cement process using carbide slag to replace limestone clinker, characterized in that: The specific process steps of low-carbon calcined cement using carbide slag instead of limestone clinker are as follows: S1, crushing and drying: crushing and drying the waste carbide slag by means of a step-by-step crushing mechanism (2) and a self-turning drying mechanism (4); S2. Screening: Screen the crushed and dried carbide slag particles, classify the carbide slag particles of different particle sizes, and ensure the uniformity of the carbide slag and limestone after mixing; S3, batching and mixing: mixing the carbide slag particles with the required raw materials evenly; S4, raw material preparation: the mixed raw materials are sent to the raw material mill for fine grinding to prepare raw materials suitable for calcination; S5, calcination treatment: the raw material is sent to the rotary kiln or vertical kiln for high-temperature calcination to produce cement clinker. Since carbide slag already contains a certain proportion of CaO, the energy consumption in this process will be relatively low; S6, cooling and storage: the calcined cement clinker is cooled and stored, waiting for further processing into finished cement; The low-carbon calcined cement process steps of using carbide slag to replace limestone clinker in the above steps S1-S6 need to be completed by the processing table (1), the step-by-step crushing mechanism (2), the screening and reflux mechanism (3), the self-turning drying mechanism (4) and the linkage driving mechanism (5); wherein: The upper end surface of the processing platform (1) is provided with a step-by-step crushing mechanism (2) for multi-step crushing of the waste carbide slag to gradually reduce the particle size; the upper part of the processing platform (1) is provided with a screening reflux mechanism (3) which is sleeved outside the step-by-step crushing mechanism (2) and is used to screen the crushed waste carbide slag and put the screened waste carbide slag back into the step-by-step crushing mechanism (2) for re-crushing; the upper end surface of the processing platform (1) and directly below the screening reflux mechanism (3) is provided with a self-turning drying mechanism (4); and a linkage driving mechanism (5) is provided between the step-by-step crushing mechanism (2), the self-turning drying mechanism (4) and the processing platform (1); The step-by-step crushing mechanism (2) comprises: A bottom box (21) is fixedly connected to the upper end surface of the processing table (1) by a fixing rod and is opened at the top and bottom; a discharge hopper (22) is fixedly connected to the upper part of the bottom box (21) by a connecting rod; a primary crushing assembly (23) is arranged between the discharge hopper (22) and the bottom box (21) for primary crushing of the waste carbide slag; a secondary crushing assembly (24) is arranged on the bottom box (21) for further crushing the waste carbide slag; and a material receiving unit (25) is arranged between the secondary crushing assembly (24) and the bottom box (21); and a connecting tube is fixed on the upper part of the bottom box (21); The secondary crushing assembly (24) comprises: a carrying ring (241) fixedly connected to the upper end surface of the processing table (1) through a connecting strip and located at the rear side of the bottom box (21), a strip-shaped slide plate (242) slidably connected to the carrying ring (241), a trapezoidal crushing plate (243) fixedly connected to the front end surface of the strip-shaped slide plate (242) and penetrating and slidably connected in the bottom box (21), a crushed plate (244) hinged to the side cavity wall of the bottom box (21) through a lug plate for cooperating with the trapezoidal crushing plate (243), and a top spring (245) fixedly connected between the crushed plate (244) and the cavity wall of the bottom box (21).

2. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 1, characterized in that: The primary crushing assembly (23) comprises a lower circular ring (231) rotatably connected to the upper port of the connecting cylinder and an upper circular ring (232) rotatably connected to the lower part of the discharge hopper (22); the upper circular ring (232) and the lower circular ring (231) are rotatably connected to each other; a plurality of bearing rods (233) are fixedly connected to the inner wall of the circumference of the lower circular ring (231) at equal intervals in the circumferential direction; a plurality of extrusion rod groups (234) are fixedly connected to the inner wall of the circumference of the upper circular ring (232) at equal intervals in the circumferential direction; the extrusion rod group (234) is composed of a plurality of single rods arranged obliquely; a reversing linkage member (235) is commonly provided between the upper circular ring (232) and the lower circular ring (231) for driving the upper circular ring (232) and the lower circular ring (231) to run in opposite directions.

3. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 2, characterized in that: The reverse linkage member (235) comprises a first gear ring (2351) fixedly connected to the outside of the lower ring (231), a second gear ring (2352) fixedly connected to the outside of the upper ring (232), an end face gear (2353) rotatably connected to the connecting rod located on the right part through a rotating column and meshing with the first gear ring (2351) and the second gear ring (2352), and a spur rack (2354) fixedly connected to the upper end surface of the bar slide (242) through an L-shaped rod and meshing with the first gear ring (2351).

4. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 1, characterized in that: The material receiving unit (25) comprises a slide groove (251) provided on the lower end surface of the strip-shaped slide plate (242), a slider (252) slidably connected in the slide groove (251), a limit spring (253) fixedly connected between the slider (252) and the slide groove (251), a fixing strip (254) fixedly connected to the lower end surface of the slider (252), and a material receiving plate (255) fixedly connected to the front end surface of the fixing strip (254), penetrating through the bottom box (21) and slidably connected and located below the trapezoidal crushing plate (243).

5. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 1, characterized in that: The upper end surface of the lug plate is fixedly connected to an inclined material guide plate (6) via a connecting column, and the inclined material guide plate (6) is in an inclined state with a side close to the rolled plate (244) being lower and a side away from the rolled plate (244) being higher.

6. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 1, characterized in that: The screening reflux mechanism (3) comprises a bracket (31) fixedly connected to the upper end surface of the processing platform (1), an annular screen drum (32) rotatably connected to the bracket (31), a plurality of circumferentially equidistantly fixedly connected to the inner wall of the annular screen drum (32), two annular retaining plates (34) symmetrically fixedly connected to the inner wall of the annular screen drum (32), and a scraping assembly (35) disposed between the processing platform (1) and the annular retaining plate (34) for scraping off materials adhered to the inner wall of the annular screen drum (32).

7. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 1, characterized in that: The self-turning drying mechanism (4) comprises a swinging assembly (41) arranged on the processing table (1), an arc-shaped drying plate (42) slidably arranged on the swinging assembly (41) and located directly below the annular screen drum (32), a plurality of inclined material-dispensing plates (43) fixedly connected to the arc-shaped inner wall of the arc-shaped drying plate (42) at equal distances along the arc direction and axial direction of the arc-shaped drying plate (42), and a stopper plate (44) fixedly connected to the left side of the inclined material-dispensing plate (43), and two rows of adjacent inclined material-dispensing plates (43) are arranged in a staggered manner.

8. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 7, characterized in that: The linkage driving mechanism (5) comprises a driving shaft (51), a first transmission shaft (52) and a second transmission shaft (53); the upper end surface of the processing table (1) is fixedly connected to a vertical plate, the vertical plate is rotatably connected to the driving shaft (51); the upper end surface of the processing table (1) is fixedly connected to a front support plate, the front support plate is rotatably connected to the first transmission shaft (52); the upper end surface of the processing table (1) is fixedly connected to a rear support plate, the rear support plate is rotatably connected to the second transmission shaft (53), the second transmission shaft (53) and the driving shaft (51) are connected via a first support plate. The bevel gear sets (54) are connected to each other in transmission, the lower end of the No. 2 transmission shaft (53) is fixedly connected with a pull rod (55), the pull rod (55) and the strip slide plate (242) are hinged to each other through a connecting rod (56), the No. 1 transmission shaft (52) and the drive shaft (51) are connected to each other in transmission through a No. 2 bevel gear set (57), the rear end surface of the arc drying plate (42) is fixedly connected with an arc rack (58); the lower end of the No. 1 transmission shaft (52) is fixedly connected with an incomplete gear (59) meshing with the arc rack (58).

9. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 6, characterized in that: The scraping assembly (35) comprises a plurality of sliding rods (351) equidistantly extending and slidingly connected to the annular retaining sill (34) at the front, an arc-shaped scraper (352) fixedly connected to the rear end of the sliding rod (351) and in contact with the inner wall of the annular screen drum (32), a return spring (353) fixedly connected between the sliding rod (351) and the annular screen drum (32), and a wedge-shaped extrusion plate (354) fixedly connected to the upper end surface of the processing table (1) via a support rod for cooperating with the sliding rod (351).

10. A low-carbon calcined cement process using carbide slag to replace limestone clinker according to claim 7, characterized in that: The swing assembly (41) comprises an arc frame (411) fixedly connected to the upper end surface of the processing table (1) via a support, the arc drying plate (42) is slidably connected in the arc frame (411), and a return spring (412) is fixedly connected between the arc frame (411) and the arc drying plate (42).

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