Production technology of all-ceramic terrazzo tiles

Abstract

The present invention relates to the technical field of ceramic tiles, and more particularly to a production process for all-ceramic terrazzo tiles. The process is characterized by comprising the following steps: raw material preparation, slurry and color matching, preparation of base powder and granular powder, pressing the granular material, screening the granular material, mixing the granular material with the base powder, pressing a green body, drying the green body, firing and shaping the green body, and polishing the green body. The present invention can effectively produce all-ceramic terrazzo tiles that mimic artificial terrazzo, with a clear and prominent granular effect throughout, excellent aesthetics, easy construction, durability, and a more affordable price.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic tiles, and in particular to a production process of full-ceramic terrazzo tiles. Background Art

[0002] Terrazzo is a commonly used building decoration material and also a kind of artificial stone. It uses cement as a binder and is mixed with marble or granite gravel of different colors and particle sizes. After mixing, molding, curing, grinding and other processes, it is made into an artificial stone with a certain decorative effect. Terrazzo flooring is a traditional craft. In the mid-to-late 20th century, terrazzo was used as the mainstream decorative style for floor projects in public places such as stations, schools, hospitals, and office buildings. However, due to reasons such as design methods and construction technology, the products often have disadvantages such as long on-site construction period, large amounts of water required for grinding and pollution of the on-site environment, low flexural strength, brittleness, poor anti-fouling performance, poor durability, easy to absorb dirt, and high price. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a production process for all-ceramic terrazzo tiles that can well produce imitation artificial terrazzo, which has a clear and prominent granular effect throughout the body, good aesthetics, is easy to construct, durable, and more affordable.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a production process of all-ceramic terrazzo tiles, characterized in that it includes the following steps:

[0005] Step 1: Put the raw materials that have undergone formula adjustment, small-scale testing and pilot testing into the raw material warehouse in large quantities for storage;

[0006] Step 2: Grind the raw materials of the green body into slurry by a slurry ball mill and prepare the slurry, and use different ceramic special colorants to prepare the colors respectively to obtain slurries of various colors, and then test the slurry;

[0007] Step 3: After the pilot test, the different colored slurries are transported to the corresponding drying towers and made into powders of different colors. The powders of different colors are divided into basic powder and granular powder. The basic powder is of one color, and the granular powder is of multiple colors. The moisture content of the basic powder is lower than that of the granular powder. The slurries are then transported to the corresponding powder silos for storage and uniform aging for 36 hours.

[0008] Step 4: transporting the granular powders of different colors to corresponding granulators and making granules of different colors, different particle sizes and irregular shapes;

[0009] Step 5: transport the prepared granular materials to the screen box for screening to screen out granular materials that meet the particle size requirements;

[0010] Step 6: transport the base powder and the granular materials of different colors that meet the particle size requirements into a mixer to mix and form a mixture;

[0011] Step 7: Feed the mixed material to the press for primary distribution and press out the green body;

[0012] Step 8: The pressed green body is transported to a drying kiln for drying at a temperature of 120-150 degrees Celsius for 90 minutes.

[0013] Step 9: The dried green body is transported to the kiln for firing and forming. The firing time is 80 minutes and the firing temperature is 1150-1200 degrees.

[0014] Step 10: transport the fired and formed green body to the polishing line for polishing and grinding.

[0015] Furthermore, in step seven, part of the granular materials of different colors are mixed and fed to the press, and a second feeding is performed after the first feeding and before the blank is pressed.

[0016] Furthermore, the color of the base powder is gray, and the colors of the granular powder include bright white, beige and pure black, with gray accounting for 35-60%, bright white accounting for 15-30%, beige accounting for 10-20%, and pure black accounting for 5-15%.

[0017] Furthermore, the moisture content of the base powder is 7-7.5%, and the moisture content of the granular powder is 7.5-8%.

[0018] Furthermore, the granulating pressure of the granulator is 2-3 kg, and the particle size of the granular material is 4-8 meshes.

[0019] Furthermore, the formula of raw materials is as follows by weight: 6-10 parts of pyrophyllite, 5-8 parts of clay, 4-7 parts of washed soil, 2-3 parts of magnesia soil, 2-3 parts of bentonite, 3-5 parts of sandy clay, 3-6 parts of tile powder, 3-4 parts of black talc, 14-20 parts of albite, 14-17 parts of tailings, 17-23 parts of potassium sand, 2-5 parts of waste powder, and 5-8 parts of kaolin.

[0020] Furthermore, the granulator includes a base and a mounting frame fixedly installed on the upper end of the base and arranged in sequence up and down, and a conveyor. A feed pipe is provided on one side of the upper end of the mounting frame. A primary rolling device, a secondary rolling device and a particle crushing and forming device are provided between the mounting frame and the base. The feed pipe, the primary rolling device, the secondary rolling device and the particle crushing and forming device are arranged in sequence along the conveying direction of the conveyor. The granular powder is fed onto the conveyor through the feed pipe. The primary rolling device and the secondary rolling device are used to roll the granular powder on the conveyor in sequence and make it into cake-shaped material. The particle crushing and forming device is used to crush the cake-shaped material on the conveyor and make it into granular material with different particle sizes and irregular shapes.

[0021] Furthermore, the primary rolling device includes a supporting base plate and a first driving rolling cylinder and a second driving rolling cylinder with driving force. The supporting base plate is fixedly installed on the upper end of the base and is passed through the conveyor belt of the conveyor. The first driving rolling cylinder and the second driving rolling cylinder are arranged in sequence along the conveying direction of the conveyor and are located directly above the supporting base plate. The first driving rolling cylinder is rotatably installed on the mounting frame and a rolling gap is provided between the first driving rolling cylinder and the conveyor. The second driving rolling cylinder is rotatably and can be moved up and down on the mounting frame and is in rolling contact with the conveyor. The mounting frame is provided with a first elastic member for always applying a downward elastic force to the second driving rolling cylinder.

[0022] Furthermore, the secondary rolling device includes a first supporting base cylinder and a third driving rolling cylinder with driving force. The first supporting base cylinder is rotatably installed on the upper end of the base and is passed through the conveyor belt of the conveyor. The third driving rolling cylinder is arranged directly above the first supporting base cylinder. The third driving rolling cylinder is rotatably and can be moved up and down on the mounting frame and is in rolling contact with the conveyor. The mounting frame is provided with a second elastic member for always applying a downward elastic force to the third driving rolling cylinder.

[0023] Furthermore, the particle crushing and forming device includes a driving crushing knife drum with driving force and a second supporting bottom cylinder. The second supporting bottom cylinder is the active roller of the conveyor. The driving crushing knife drum is arranged directly above the second supporting bottom cylinder. The driving crushing knife drum is rotatably installed on the mounting frame and close to the upper end face of the conveyor. The driving crushing knife drum includes a rotating shaft and annular blades. Several annular blades are fixedly installed on the rotating shaft along its length direction. The outer circumferential edge of the annular blade is serrated, and the tooth tips on the two adjacent annular blades are staggered.

[0024] From the above description, it can be seen that the production process of the all-ceramic terrazzo tiles provided by the present invention has the following beneficial effects: it can well produce all-ceramic terrazzo tiles that imitate artificial terrazzo, the granular effect of the whole body is clear and prominent, with good aesthetics, convenient construction, and high flexural strength, more than 8000 / N, durable, good anti-fouling performance, reaching anti-fouling level 5, high anti-slip and wear resistance, and not easy to absorb dirt, and the price is cheaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the all-ceramic terrazzo tile produced by the production process of the all-ceramic terrazzo tile of the present invention.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the granulator.

[0027] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0028] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle.

[0029] Figure 5 Schematic diagram of the internal structure of the granulator.

[0030] In the figure: 1-blade; 11-granular material; 2-granulator; 21-base; 22-mounting frame; 23-conveyor; 231-conveyor belt; 24-feeding pipe; 241-feeding pipe body; 242-discharging pipe body; 25-primary rolling device; 251-supporting bottom plate; 252-first driving rolling cylinder; 253-second driving rolling cylinder; 254-first elastic member; 255-second seat bearing; 256-lifting plate; 257-guide rod; 26-secondary rolling device; 261-first supporting bottom cylinder; 262-third driving rolling cylinder Cylinder; 263-second elastic member; 264-lifting seat; 265-guide rail; 266-fixed screw; 267-pressing plate; 268-locking nut; 2691-first adjusting screw; 2692-first adjusting nut; 27-particle crushing and forming device; 271-driving crushing knife cylinder; 2711-rotating shaft; 2712-annular blade; 272-second supporting bottom cylinder; 273-adjusting plate; 274-second adjusting screw; 275-second adjusting nut; 276-third seat bearing; 277-fixed block; 28-material balancing plate. DETAILED DESCRIPTION

[0031] The present invention is further described below through specific embodiments.

[0032] like Figures 1 to 5As shown, the production process of the all-ceramic terrazzo tiles of the present invention is characterized by comprising the following steps:

[0033] Step 1: Put the raw materials that have undergone formula adjustment, small-scale testing and pilot testing into the raw material warehouse in large quantities for storage;

[0034] Step 2: Grind the raw material of the green body 1 into slurry by a slurry ball mill and prepare the slurry, and use different ceramic special colorants to prepare the colors respectively to obtain slurries of various colors, and then test the slurry;

[0035] Step 3: After the pilot test, the different colored slurries are transported to the corresponding drying towers and made into powders of different colors. The powders of different colors are divided into basic powder and granular powder. The basic powder is of one color, and the granular powder is of multiple colors. The moisture content of the basic powder is lower than that of the granular powder. The slurries are then transported to the corresponding powder silos for storage and uniform aging for 36 hours.

[0036] Step 4: transporting the granular powders of different colors to the corresponding granulators 2 and producing granular materials 11 of different colors, different particle sizes and irregular shapes;

[0037] Step 5: transporting the prepared granular material 11 to a screen box for screening to screen out granular material 11 that meets the particle size requirements;

[0038] Step 6: transport the base powder and the granular materials of different colors 11 that meet the particle size requirements into a mixer to mix and form a mixture;

[0039] Step 7: Feed the mixed material to the press for primary distribution and press out the green body 1;

[0040] Step 8: transport the pressed green body 1 to a drying kiln for drying. The drying time is 90 minutes and the drying temperature is 120-150 degrees.

[0041] Step 9: transport the dried green body 1 to a kiln for firing and forming. The firing time is 80 minutes and the firing temperature is 1150-1200 degrees.

[0042] Step 10: transport the fired and formed green body 1 to a polishing line for polishing and grinding.

[0043] In step seven, some of the granular materials 11 of different colors are mixed and fed to the press and a second feeding is performed after the first feeding and before the blank 1 is pressed. By performing an additional second feeding of the granular materials 11, the granular effect on the surface of the all-ceramic terrazzo tile can be better improved.

[0044] Preferably, the color of the base powder is gray, and the colors of the granular powder include bright white, beige and pure black, with the gray accounting for 35-60%, the bright white accounting for 15-30%, the beige accounting for 10-20%, and the pure black accounting for 5-15%.

[0045] Preferably, the moisture content of the base powder is 7-7.5%, and the moisture content of the granular powder is 7.5-8%. By setting the moisture content of the granular powder to 7.5-8%, the humidity is just right, which facilitates better granulation of the granular powder into granular material 11, is not easy to disperse, and is not easy to produce more fine powder and cause waste during the granulation process. When the granular powder is granulated and forms granular material 11, the bonding between the granular material 11 and the base powder can be better, and the generation of tiny cracks between the two after firing is completed can be better avoided. At the same time, by setting the moisture content of the base powder to be lower than the moisture content of the granular powder, that is, the moisture content of the base powder is lower than the moisture content of the granular material 11. The rate is good, which is beneficial to avoid the basic powder adhering to the outer surface of the granular material 11 and wrapping the granular material 11 during the mixing process of the granular material 11 and the basic powder. This can better reflect the granular effect of the granular material 11, and the granular material 11 can be better highlighted, and the granular feeling is clearer. At the same time, it can also avoid the basic powder from agglomerating itself during the mixing process. In addition, the water content of the basic powder is set to be slightly lower, which is also beneficial to the exhaust during the firing process of the green body 1. Because if the water content of the basic powder is high, it is easy to soften during the pressing process, and the whole body will stick tightly, which will cause poor exhaust during the firing process, and lead to the appearance of interlayers, and eventually become waste.

[0046] Preferably, the granulation pressure of the granulator 2 is 2-3 kg.

[0047] Preferably, the particle size of the granular material 11 is 4-8 mesh. By pre-screening out the granular materials 11 with too small particle size and too large particle size, the all-ceramic terrazzo tile will have a better overall particle effect after being fired, avoiding the unclear and unremarkable particle feeling caused by the granular material 11 having too small particle size and large amount.

[0048] Correspondingly, the formula of the raw materials is as follows by weight: 6-10 parts of talc, 5-8 parts of clay, 4-7 parts of washed soil, 2-3 parts of magnesia soil, 2-3 parts of bentonite, 3-5 parts of sand clay, 3-6 parts of tile powder, 3-4 parts of black talc, 14-20 parts of sodium feldspar, 14-17 parts of tailings, 17-23 parts of potassium sand, 2-5 parts of waste powder, and 5-8 parts of kaolin. By adopting this formula structure, it has very good toughness. In this way, when the granular powder is granulated into large granular particles 11, the particles 11 are not easy to disperse. At the same time, by adopting this formula structure, after the all-ceramic terrazzo tile is fired, its flexural strength is high, more than 8000 / N, it is durable, has good anti-fouling performance, reaches anti-fouling level 5, has high anti-slip and wear resistance, and is not easy to absorb dirt.

[0049] In addition, a certain amount of additives are added to the raw material formula, including trimer, grinding aid and enhancer, among which trimer is used to dilute to improve the fluidity of the raw material formula. Accordingly, 0.15 parts of trimer, 0.3 parts of grinding aid and 0.1 parts of enhancer are required for every 100 parts of raw material formula.

[0050] Specifically, the granulator 2 includes a base 21 and a mounting frame 22 and a conveyor 23 fixedly mounted on the upper end of the base 21 and arranged in sequence up and down. A feed pipe 24 is provided on one side of the upper end of the mounting frame 22. A primary rolling device 25, a secondary rolling device 26 and a particle crushing and forming device 27 are provided between the mounting frame 22 and the base 21. The feed pipe 24, the primary rolling device 25, the secondary rolling device 26 and the particle crushing and forming device 27 are arranged in sequence along the conveying direction of the conveyor 23. The granular powder is loaded onto the conveyor 23 through the feed pipe 24. The primary rolling device 25 and the secondary rolling device 26 are used to roll the granular powder on the conveyor 23 in sequence and make it into cake-shaped material. The particle crushing and forming device 27 is used to crush the cake-shaped material on the conveyor 23 and make it into granular material 11 with different particle sizes and irregular shapes.

[0051] During granulation, the granular powder can enter the feed end of the conveyor 23 through the feed pipe 24, and then under the movement of the conveyor belt 231 of the conveyor 23, the granular powder can pass through the primary rolling device 25, the secondary rolling device 26 and the particle crushing and forming device 27 in sequence. In this way, the primary rolling device 25 can play a primary rolling role on the granular powder, and the secondary rolling device 26 can play a secondary rolling role on the granular powder, so that the granular powder is rolled into a cake-like material, and then, under the crushing action of the particle crushing and forming device 27, the cake-like material can be broken into granular materials 11 of different particle sizes and irregular shapes, and the overall structural strength of the granular material 11 can be well guaranteed. Under the pressure of the subsequent press, it is not easy to disperse, and the granular effect of the granular material 11 can be better maintained. Finally, the granular material 11 after granulation is completed will be discharged from the discharge end of the conveyor 23.

[0052] Correspondingly, the feed pipe 24 includes a feed pipe body 241 provided at the upper end and a plurality of discharge pipe bodies 242 provided at the lower end. The feed pipe body 241 is communicated with the plurality of discharge pipe bodies 242. In this way, when the granular powder is fed, the granular powder can be fed more evenly along the width direction of the conveyor 23. In addition, a material leveling plate 28 is fixedly installed on the mounting frame 22 between the feed pipe 24 and the primary rolling device 25. A material leveling gap is provided between the feed plate and the conveyor 23, thereby facilitating further evenly spreading the granular powder on the conveyor 23, which is conducive to subsequent uniform rolling.

[0053] Preferably, the number of the discharge tubes 242 is 2-4.

[0054] Specifically, the primary rolling device 25 includes a supporting base plate 251 and a first driving rolling cylinder 252 and a second driving rolling cylinder 253 with driving force. The supporting base plate 251 is fixedly installed on the upper end of the base 21 and is passed through the conveyor belt 231 of the conveyor 23. The first driving rolling cylinder 252 and the second driving rolling cylinder 253 are arranged in sequence along the conveying direction of the conveyor 23 and are located directly above the supporting base plate 251. The first driving rolling cylinder 252 is rotatably installed on the mounting frame 22 and a rolling gap is provided between it and the conveyor 23. The second driving rolling cylinder 253 is rotatably and can be moved up and down on the mounting frame 22 and is in rolling contact with the conveyor 23. The mounting frame 22 is provided with a first elastic member 254 for always applying a downward elastic force to the second driving rolling cylinder 253. In addition, the material balancing gap is larger than the rolling gap.

[0055] Correspondingly, the primary rolling device 25 also includes a first rolling drive motor for driving the first driving rolling cylinder 252 to rotate and a second rolling drive motor for driving the second driving rolling cylinder 253 to rotate, so that the first driving rolling cylinder 252 has a driving force and actively rotates, and the second driving rolling cylinder 253 has a driving force and actively rotates. In this way, in conjunction with the supporting role played by the supporting base plate 251, during the rotation of the first driving rolling cylinder 252, the setting of the rolling gap can firstly pre-roll the fluffy granular powder, and further flatten the granular powder, so as to pre-roll the granular powder into a corresponding thickness, and the overall thickness is more uniform, which is conducive to the subsequent smooth rolling of the second driving rolling cylinder 253. Then, during the rotation of the second driving rolling cylinder 253, the downward elastic force applied by the first elastic member 254 to the second driving rolling cylinder 253 can further apply pressure to the granular powder for rolling, and the granular powder can be pressed more solidly to improve the overall strength.

[0056] In addition, a first cleaning scraper for cleaning the surface of the first driving roller cylinder 252 and a second cleaning scraper for cleaning the surface of the second driving roller cylinder 253 are also installed on the mounting frame 22.

[0057] Specifically, both ends of the first driving roller 252 are rotatably mounted on the mounting frame 22 through corresponding first seat bearings, and both ends of the second driving roller 253 are rotatably mounted on corresponding lifting plates 256 through corresponding second seat bearings 255. A first guide mechanism is provided between the lifting plate 256 and the mounting frame 22. The first guide mechanism includes a guide rod 257 and a guide hole. The guide rod 257 is two and spaced apart. The upper and lower ends of the guide rod 257 are fixedly mounted on the mounting frame 22. The lifting plate 256 is provided with a guide hole. There are two guide holes, and the guide rod 257 passes through the corresponding guide holes on the lifting plate 256 and the two are slidably fitted together, thereby playing a good guiding role in the up and down movement of the lifting plate 256. In addition, preferably, the first elastic member 254 is a first compression spring, and the first compression spring is sleeved on the corresponding guide rod 257. The upper end of the first compression spring abuts against the mounting frame 22, and the lower end of the first compression spring abuts against the lifting plate 256, thereby always applying a downward elastic force to the second driving roller 253.

[0058] Specifically, the secondary rolling device 26 includes a first supporting bottom cylinder 261 and a third driving rolling cylinder 262 with driving force. The first supporting bottom cylinder 261 is rotatably installed on the upper end of the base 21 and is passed through the conveyor belt 231 of the conveyor 23. The third driving rolling cylinder 262 is arranged directly above the first supporting bottom cylinder 261. The third driving rolling cylinder 262 is rotatably and can be moved up and down on the mounting frame 22 and is in rolling contact with the conveyor 23. The mounting frame 22 is provided with a second elastic member 263 for always applying a downward elastic force to the third driving rolling cylinder 262.

[0059] Correspondingly, the secondary rolling device 26 also includes a third rolling drive motor for driving the third driving rolling cylinder 262 to rotate, so that the third driving rolling cylinder 262 has a driving force and actively rotates. In this way, in conjunction with the supporting role played by the first supporting low cylinder, during the rotation of the third driving rolling cylinder 262, the downward elastic force applied by the second elastic member 263 to the third driving rolling cylinder 262 can apply pressure to the granular powder after rolling for rolling again. Accordingly, the pressure is set to 2-3 kilograms, and the granular powder is finally rolled into a cake-shaped material with a certain structural strength, so that after subsequent crushing, a granular material 11 with a certain structural strength and no cracks is formed. At the same time, the granular material 11 can be better bonded with the basic powder, and the formation of tiny cracks between the two after re-firing is better avoided. If the pressure value is set too small, the granular material 11 is likely to scatter and the particles are not formed. If the pressure value is set too large, the shrinkage of the granular material 11 and the basic powder is likely to be different.

[0060] In addition, a third cleaning scraper for cleaning the surface of the third driving roller 262 is fixedly mounted on the mounting frame 22 .

[0061] Specifically, the third driving roller 262 is rotatably mounted on the corresponding lifting seat 264 through corresponding bearings, and a second guide mechanism is provided between the lifting seat 264 and the mounting frame 22, and the second guide mechanism is two and is respectively provided on the left and right sides of the lifting seat 264, and the second guide mechanism includes a guide rail 265 and a guide slot, and the guide rail 265 is fixedly mounted on the mounting frame 22, and the left and right side surfaces of the lifting seat 264 are provided with the guide slot, and the guide rail 265 is clamped in the guide slot of the lifting seat 264 and the two are slidably matched, thereby playing a good guiding role in the up and down movement of the lifting seat 264. Preferably, the second elastic member 263 is a second compression spring, and the second compression spring is sleeved on the fixed screw 266, and the fixed screw 266 is fixedly provided on the upper end of the lifting seat 264, and the lower end of the second compression spring abuts against the lifting seat 264, and the upper end of the second compression spring abuts against the pressure plate 267, and the fixed screw 266 The upper end passes through the pressure plate 267 and is threadedly connected to a locking nut 268 located at the upper end of the pressure plate 267. A pressure adjustment mechanism is provided between both ends of the pressure plate 267 and the mounting bracket 22, and the pressure adjustment mechanism includes a first adjusting screw 2691 and a first adjusting nut 2692. Both ends of the pressure plate 267 are provided with a first adjustment hole. The lower end of the first adjusting screw 2691 is fixed to the mounting bracket 22, and the upper end of the first adjusting screw 2691 extends upward and passes through the first adjustment hole. The first adjusting screw 2691 is threadedly connected to the first adjusting nut 2692 located at the upper and lower ends of the pressure plate 267. As a result, the second compression spring can always exert a downward elastic force on the third driving rolling cylinder 262. At the same time, the installation height of the pressure plate 267 can be adjusted by rotating the first adjusting nut 2692, thereby adjusting the compression degree of the second compression spring to adjust the magnitude of the downward elastic force exerted on the third driving rolling cylinder 262.

[0062] Specifically, the particle crushing and forming device 27 includes a driving crushing knife drum 271 with driving force and a second supporting bottom cylinder 272, the second supporting bottom cylinder 272 is the active roller of the conveyor 23, the driving crushing knife drum 271 is arranged directly above the second supporting bottom cylinder 272, the driving crushing knife drum 271 is rotatably installed on the mounting frame 22 and close to the upper end surface of the conveyor 23, the driving crushing knife drum 271 includes a rotating shaft 2711 and an annular blade 2712, and a plurality of annular blades 2712 are fixedly installed on the rotating shaft 2711 along its length direction. The outer circumferential edge of the annular blade 2712 is serrated, and the tooth tips on two adjacent annular blades 2712 are staggered.

[0063] Correspondingly, the particle crushing and forming device 27 also includes a crushing drive motor for driving the driving crushing knife drum 271 to rotate, so that the driving crushing knife drum 271 has a driving force and actively rotates. As a result, in conjunction with the supporting role played by the second supporting bottom cylinder 272, during the rotation of the driving crushing knife drum 271, the tooth tips on the annular blade 2712 can continuously crush the cake-shaped material that has been rolled on the conveyor 23, thereby producing a number of granular materials 11 with different particle sizes and irregular shapes, with better crushing effect, which can avoid the production of a large number of granular materials 11 with small particle sizes, so as to improve the overall crushing efficiency. The upper and lower end surfaces of the granular material 11 are both flat, and the overall shape is an irregular polyhedron. While making the shape of the granular material 11 closer to the shape of the gravel in the terrazzo in the prior art, after being pressed into the blank 1, the granular effect of the granular material 11 can also be more prominent.

[0064] Specifically, a height adjustment mechanism is provided between both ends of the driven crushing knife drum 271 and the mounting frame 22, and the height adjustment mechanism includes an adjustment plate 273, a second adjustment screw 274 and a second adjustment nut 275. Both ends of the rotating shaft 2711 are rotatably mounted on the corresponding adjusting plate 273 through corresponding third seat bearings 276. There are two adjusting screws and they are arranged at intervals. The lower end of the adjusting screw is fixed to the upper end of the adjusting plate 273, and the upper end of the adjusting screw extends upward and passes through the corresponding second adjustment hole on the fixed block 277. The fixed block 277 is fixed to the mounting frame 22. The second adjusting screw 274 is threadedly connected to the upper and lower ends of the fixed block 277 with the second adjusting nut 275. In this way, it is convenient to adjust the installation height of the driven crushing knife drum 271 to adjust the crushing gap between the driven crushing knife drum 271 and the conveyor 23, thereby adjusting the crushing effect of the annular blade 2712 on the cake-like material.

[0065] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. The production process of all-ceramic terrazzo tiles is characterized by: The steps include: Step 1: Put the raw materials that have undergone formula adjustment, small-scale testing and pilot testing into the raw material warehouse in large quantities for storage; Step 2: Grind the raw materials of the green body into slurry by a slurry ball mill and prepare the slurry, and use different ceramic special colorants to prepare the colors respectively to obtain slurries of various colors, and then test the slurry; Step 3: After the pilot test, the different colored slurries are transported to the corresponding drying towers and made into powders of different colors. The powders of different colors are divided into basic powder and granular powder. The basic powder is of one color, and the granular powder is of multiple colors. The moisture content of the basic powder is lower than that of the granular powder. The slurries are then transported to the corresponding powder silos for storage and uniform aging for 36 hours. Step 4: transporting granular powders of different colors to corresponding granulators respectively and making granular materials of different colors, different particle sizes and irregular shapes, the granulator comprising a base and a mounting frame and a conveyor fixedly mounted on the upper end of the base and sequentially arranged up and down, a feeding pipe being provided on one side of the upper end of the mounting frame, a primary rolling device, a secondary rolling device and a particle crushing and forming device being provided between the mounting frame and the base, the feeding pipe, the primary rolling device, the secondary rolling device and the particle crushing and forming device being sequentially arranged along the conveying direction of the conveyor, the granular powder is fed onto the conveyor through the feeding pipe, the primary rolling device and the secondary rolling device are used to roll the granular powder on the conveyor in sequence and make it into cake-shaped materials, the particle crushing and forming device is used to crush the cake materials on the conveyor and make it into granular materials of different particle sizes and irregular shapes; Step 5: transport the prepared granular materials to the screen box for screening to screen out granular materials that meet the particle size requirements; Step 6: transport the base powder and the granular materials of different colors that meet the particle size requirements into a mixer to mix and form a mixture; Step 7: Feed the mixed material to the press for primary distribution and press out the green body; Step 8: The pressed green body is transported to a drying kiln for drying at a temperature of 120-150 degrees Celsius for 90 minutes. Step 9: The dried green body is transported to the kiln for firing and forming. The firing time is 80 minutes and the firing temperature is 1150-1200 degrees. Step 10: transport the fired and formed green body to the polishing line for polishing and grinding.

2. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: In step seven, part of the granular materials of different colors are mixed and fed to the press, and a second feeding is performed after the first feeding and before the blank is pressed.

3. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The color of the basic powder is gray, and the colors of the granular powder include bright white, beige and pure black. The gray accounts for 35-60%, the bright white accounts for 15-30%, the beige accounts for 10-20%, and the pure black accounts for 5-15%.

4. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The moisture content of the basic powder is 7-7.5%, and the moisture content of the granular powder is 7.5-8%.

5. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The granulating pressure of the granulator is 2-3 kg, and the particle size of the granular material is 4-8 meshes.

6. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The formula of the raw materials is as follows by weight: 6-10 parts of pyrophyllite, 5-8 parts of clay, 4-7 parts of washed soil, 2-3 parts of magnesia soil, 2-3 parts of bentonite, 3-5 parts of sandy clay, 3-6 parts of tile powder, 3-4 parts of black talc, 14-20 parts of albite, 14-17 parts of tailings, 17-23 parts of potassium sand, 2-5 parts of waste powder, and 5-8 parts of kaolin.

7. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The primary rolling device includes a supporting base plate and a first driving roller and a second driving roller with driving force. The supporting base plate is fixedly mounted on the upper end of the base and is passed through the conveyor belt of the conveyor. The first driving roller and the second driving roller are arranged in sequence along the conveying direction of the conveyor and are located directly above the supporting base plate. The first driving roller is rotatably mounted on the mounting frame and a rolling gap is provided between the first driving roller and the conveyor. The second driving roller is rotatably and can be moved up and down on the mounting frame and is in rolling contact with the conveyor. The mounting frame is provided with a first elastic member for always applying a downward elastic force to the second driving roller.

8. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The secondary rolling device includes a first supporting bottom cylinder and a third driving rolling cylinder with driving force. The first supporting bottom cylinder is rotatably installed on the upper end of the base and is passed through the conveyor belt of the conveyor. The third driving rolling cylinder is arranged directly above the first supporting bottom cylinder. The third driving rolling cylinder is rotatably and can be moved up and down on the mounting frame and is in rolling contact with the conveyor. The mounting frame is provided with a second elastic member for always applying a downward elastic force to the third driving rolling cylinder.

9. The production process of all-ceramic terrazzo tiles according to claim 1, characterized in that: The particle crushing and forming device includes a driving crushing knife drum with driving force and a second supporting bottom cylinder, the second supporting bottom cylinder is the active roller of the conveyor, the driving crushing knife drum is arranged directly above the second supporting bottom cylinder, the driving crushing knife drum is rotatably installed on the mounting frame and close to the upper end surface of the conveyor, the driving crushing knife drum includes a rotating shaft and an annular blade, and a plurality of annular blades are fixedly installed on the rotating shaft along its length direction, the outer circumferential edge of the annular blade is serrated, and the tooth tips on two adjacent annular blades are staggered.

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