Method for preparing gel material by vertical mill production process

Abstract

The invention discloses a method for preparing a gel material by a vertical mill production process, which comprises the following steps of: putting water granulated slag, steel slag and desulfurized gypsum into a feeding bin according to a proper proportion, and feeding into a feeding hole of a vertical mill through conveying equipment; the motor drives the millstone to rotate through the speed reducer, and materials fall to the center of the millstone from the discharging port. In the ground materials, coarse powder can fall back to the grinding disc to be ground again, and fine powder enters the powder concentrator along with airflow; the ground materials can be dried by means of hot air provided by a hot air furnace; the dried materials are subjected to powder selecting through a powder selecting machine, and the materials meeting the fineness requirement are fed into a dust collector to be collected and stored in a finished product warehouse; and the materials needing to be ground again are conveyed to the elevator through the sealed material returning device and are conveyed to the vertical mill through the elevator to be ground continuously, and circulation is formed. Different materials can be mixed, ground and dried at a time, the preparation process is simple, the production cost is reduced, and the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of gel preparation, and in particular to a method for preparing gel material by a vertical mill production process. Background Art

[0002] Since cement production is a traditional high-emission, high-energy consumption industry, annual CO2 emissions account for 5%-8% of the world. In order to save resources and reduce CO2 emissions, various industrial solid wastes are used to replace cement as auxiliary cementitious materials, such as blast furnace slag, fly ash, and silica fume. Slag in steel solid waste contains a large amount of glass phase, so it has potential hydraulic properties. The activity of high-quality slag powder can surpass cement, so it has become a mature application product of mineral admixtures.

[0003] The existing invention patent with publication number CN117228970A discloses a gypsum slag-based ultra-retarded gelling binder and a preparation method thereof, comprising the following steps: dehydrating and drying the desulfurized gypsum, grinding the desulfurized gypsum to a fineness of 80-100 meshes and a moisture content of ≤1wt% through low-temperature drying, and then storing the desulfurized gypsum in a batching tank; storing ordinary silicate cement, slag powder, composite activator and quicklime in different batching tanks; stirring: placing each raw material in a mixer and stirring evenly according to the proportion of the gypsum slag-based ultra-retarded gelling binder; and storing the mixture in a finished product tank to obtain the gypsum slag-based ultra-retarded gelling binder.

[0004] In view of the above-mentioned prior art, the inventors believe that the existing preparation method requires multiple operations such as mixing, grinding and drying of various materials, and the preparation method is complicated and the production efficiency is low. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for preparing gel material by vertical mill production process, which has simple preparation process, reduces production cost and improves production efficiency.

[0006] In order to achieve the above object, the present invention provides a method for preparing a gel material by a vertical mill production process, comprising the following steps:

[0007] S1: Put water slag, steel slag and desulfurized gypsum into the loading bin according to the ratio of 60%-70%, 10%-20% and 20%-30% respectively, and send them to the feeding port of the vertical mill through the conveying equipment;

[0008] S2: The motor drives the grinding disc to rotate through the reducer, and the material falls from the discharge port to the center of the grinding disc; under the action of centrifugal force, the material moves to the edge of the grinding disc and is crushed by the grinding roller; among the ground materials, the coarse powder will fall back to the grinding disc for re-grinding, while the fine powder will enter the powder classifier with the air flow;

[0009] S3: The ground materials are dried with the help of hot air provided by the hot air furnace; the dried materials are selected by the powder classifier, and the materials that meet the fineness requirements are sent to the dust collector for collection and stored in the finished product warehouse;

[0010] S4: For materials that need to be ground again, they are transported to the elevator through a sealed return device, and the elevator inputs the materials into the vertical mill for further grinding, forming a closed loop.

[0011] Furthermore, the sealed material return device includes a bracket, a sealed cabin, a belt conveyor mechanism and a screw conveyor mechanism; the sealed cabin is fixed on the bracket, and the sealed cabin includes an upper cabin body, a lower cabin body and a discharge cabin body that are connected, the cross-sectional shape of the upper cabin body in the length direction is a square, the cross-sectional shape of the lower cabin body in the length direction is a triangle, and its bottom end adopts an arc transition; a feed port is opened at one end of the top wall of the upper cabin body, the discharge cabin body is connected to one end of the upper cabin body away from the feed port, and the upper cabin body and the lower cabin body are both connected to the discharge cabin body. The belt conveyor mechanism is installed in the upper cabin body, and the screw conveyor mechanism is installed in the lower cabin body.

[0012] Furthermore, the belt conveying mechanism includes a first motor, a driving roller, a driven roller and a belt, the driving roller and the driven roller are rotatably installed in the upper cabin body, the belt is wound around the outside of the driving roller and the driven roller, the first motor is fixed to the outer wall of the upper cabin body and its output shaft is connected to the driving roller to drive the belt to operate; the screw conveying mechanism includes a screw conveying rod and a second motor, the screw conveying rod is rotatably connected to the arc-shaped transition part of the lower cabin body, the second motor is bolted to the outer wall of one end of the lower cabin body away from the discharge cabin body, and the output shaft of the second motor is connected to the screw conveying rod to drive the screw conveying rod to rotate.

[0013] Furthermore, two anti-sticking material components are provided in the upper cabin body, and the two anti-sticking material components are installed at the two ends of the belt conveying mechanism. The anti-sticking material components include two wedge blocks and a steel wire. The two wedge blocks are respectively arranged on both sides of the belt conveying mechanism and fixed on the inner wall of the upper cabin body; the two ends of the steel wire are respectively fixedly connected to the two wedge blocks, and the steel wire is arranged in a close contact with the top wall of the outer ring of the belt.

[0014] Furthermore, a wedge surface is formed on the side wall of the wedge block close to the belt, and the wedge surface is inclined toward the direction close to the belt conveying mechanism in the material conveying direction, and the edge of the belt is located in the middle of the bottom side of the wedge surface; an eaves plate is fixed to the bottom surface of the wedge block located on the outside of the belt, and the eaves plate includes a flat plate and an inclined plate connected to each other, the flat plate is attached to the top wall of the edge of the inner ring of the belt, and the inclined plate is arranged to be inclined downward in the direction away from the belt.

[0015] Beneficial effects of the present invention:

[0016] The method of the present invention can mix, grind and dry different materials at one time, and can make coordinated and efficient resource utilization of water slag, steel slag and detached gypsum, so as to realize the recycling of waste. The cementitious material finally prepared can be used to prepare products such as plain concrete with high requirements for early strength. The process is simple, the production cost is reduced and the production efficiency is improved. By arranging a sealed material return device and adopting a fully enclosed form, the upper layer is a belt conveyor and the lower layer is a spiral conveyor, the material leaked during the belt conveying process falls into the spiral conveying mechanism of the lower layer and enters the elevator together with the belt conveyed material, so as to effectively avoid material leakage on site, enhance the wind locking effect of the system and reduce heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the sealed material return device in the present invention.

[0018] Figure 2 It is a partial cutaway view used to illustrate the internal structure of the sealed return material device in the present invention.

[0019] Figure 3 It is a partial cutaway view used to illustrate the sealed cabin structure in the present invention.

[0020] Figure 4 It is a partial structural schematic diagram used to reflect the anti-sticking material component in the present invention.

[0021] Figure 5 It is a schematic diagram of the local structure of the eaves board in the present invention.

[0022] In the figure: 1. bracket; 2. sealed cabin; 21. upper cabin; 22. lower cabin; 23. discharge cabin; 3. belt conveyor mechanism; 31. first motor; 32. active roller; 33. driven roller; 34. belt; 4. screw conveyor mechanism; 41. screw conveyor rod; 42. second motor; 5. anti-sticking material assembly; 51. wedge block; 511. wedge surface; 52. steel wire; 53. eaves board; 531. flat plate; 532. inclined plate. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] The invention discloses a method for preparing gel material by a vertical mill production process.

[0025] A method for preparing a gel material by a vertical mill production process comprises the following steps:

[0026] S1: Put water slag, steel slag and desulfurized gypsum into the loading bin according to the ratio of 60%-70%, 10%-20% and 20%-30%, and send them to the feeding port of the vertical mill through the conveying equipment;

[0027] S2: The motor drives the grinding disc to rotate through the reducer, and the material falls from the discharge port to the center of the grinding disc. Under the action of centrifugal force, the material moves to the edge of the grinding disc and is crushed by the grinding roller. Among the ground materials, the coarse powder will fall back to the grinding disc for re-grinding, while the fine powder will enter the powder classifier with the air flow.

[0028] S3: The ground materials are dried with the help of hot air from the hot air furnace. The dried materials are selected by the powder selector, and the materials that meet the fineness requirements are sent to the dust collector for collection and stored in the finished product warehouse.

[0029] S4: For materials that need to be ground again, such as steel slag, the ground slag will be transported to the elevator together with the mill slag by the sealed return device, and then input into the vertical mill through the elevator for further grinding, forming a closed loop.

[0030] This method can mix, grind and dry different materials at one time, and make efficient and coordinated resource utilization of slag, steel slag and detached gypsum to achieve waste recycling. The final cementitious material can be used to prepare products such as plain concrete with high early strength requirements, greatly reducing production costs.

[0031] The return material generated by the existing conventional vertical mill enters the elevator through the belt 34 machine, and then enters the vertical mill for re-grinding; when the return material is transported on the belt 34 machine, it generates a lot of dust, and there is a problem of material sticking on the surface of the belt 34. During the material transportation process, the material on the edge of the belt 34 will fall to the ground, causing ground pollution and dust on site; furthermore, the belt 34 machine is an open structure, which cannot lock the wind, and a large amount of cold air enters the vertical mill, causing thermal damage to the vertical mill and increasing the drying cost.

[0032] Reference Figures 1 to 3 The sealed return device includes a bracket 1, a sealed cabin 2, a belt conveyor mechanism 3 and a screw conveyor mechanism 4; the sealed cabin 2 includes an upper cabin body 21, a lower cabin body 22 and a discharge cabin body 23 which are connected to each other. The cross-sectional shape of the upper cabin body 21 in the length direction is square, the cross-sectional shape of the lower cabin body 22 in the length direction is triangular, and the bottom end thereof adopts an arc transition; a feed port is provided at one end of the top wall of the upper cabin body 21, and the discharge cabin body 23 is connected to one end of the upper cabin body 21 away from the feed port, and the upper cabin body 21 and the lower cabin body 22 are both connected to the discharge cabin body 23.

[0033] Reference Figure 2 and Figure 3The belt conveying mechanism 3 is installed in the upper cabin body 21, and the screw conveying mechanism 4 is installed in the lower cabin body 22; the belt conveying mechanism 3 includes a first motor 31, an active roller 32, a driven roller 33 and a belt 34, the active roller 32 and the driven roller 33 are rotatably installed in the upper cabin body 21, the belt 34 is wound around the outside of the active roller 32 and the driven roller 33, the first motor 31 is fixed to the outer wall of the upper cabin body 21 and its output shaft is connected to the active roller 32 to drive the belt 34 to operate.

[0034] Reference Figure 2 and Figure 3 The screw conveying mechanism 4 includes a screw conveying rod 41 and a second motor 42. The screw conveying rod 41 is rotatably connected to the arc-shaped transition portion of the lower cabin body 22. The second motor 42 is bolted to the outer wall of one end of the lower cabin body 22 away from the discharge cabin body 23. The output shaft of the second motor 42 is connected to the screw conveying rod 41 to drive the screw conveying rod 41 to rotate.

[0035] The sealed material return device adopts a fully enclosed form, with the upper layer being conveyed by a belt 34 and the lower layer being conveyed by a spiral. The material leaked during the conveying process of the belt 34 falls into the spiral conveying mechanism 4 of the lower layer and enters the elevator together with the material conveyed by the belt 34, effectively avoiding material leakage on site and improving the wind locking effect of the system.

[0036] Reference Figure 4 and Figure 5 Two anti-sticking components 5 are arranged in the upper cabin 21. The two anti-sticking components are installed at both ends of the belt conveyor 3. The anti-sticking components 5 include two wedge blocks 51 and steel wires 52. The two wedge blocks 51 are arranged at both sides of the belt conveyor 3 and fixed on the inner wall of the upper cabin 21. The steel wire 52 has a diameter of 3 mm, and its two ends are fixedly connected to the two wedge blocks 51 respectively. The steel wire 52 is arranged on the upper surface of the belt 34. The design of the anti-sticking component 5 enables the belt conveyor 3 to scrape off the materials adhering to the surface of the belt 34 when transporting materials, thereby ensuring the conveying effect of the materials.

[0037] Reference Figure 4 and Figure 5 A wedge surface 511 is formed on the side wall of the wedge block 51 close to the belt 34. The wedge surface 511 is inclined toward the belt conveyor mechanism 3 in the material conveying direction, and the edge of the belt 34 is located in the middle of the bottom side of the wedge surface 511; a cornice 53 is fixed to the bottom surface of the wedge block 51 located outside the belt 34. The cornice 53 includes a flat plate 531 and an inclined plate 532 connected to each other. The flat plate 531 is attached to the top wall of the inner edge of the belt 34, and the inclined plate 532 is inclined downward in the direction away from the belt 34.

[0038] When the belt 34 is conveying materials, the materials at the edge of the belt 34 contact the wedge surface 511 of the wedge block 51, and under the blocking and guiding effect, slide onto the eaves 53, and then fall from the eaves 53 to the spiral conveying mechanism 4, which can effectively prevent the materials from falling into the inner ring of the belt 34 and affecting the normal operation of the belt conveying mechanism 3; secondly, due to the poor bearing performance of the edge of the belt 34, the design of the wedge block 51 and the eaves 53 actively guides the materials at the edge of the belt 34 into the lower cabin 22, reducing the deformation and damage of the edge of the belt 34. In addition, the flat plate 531 in the eaves 53 also has a good supporting effect on the edge of the belt 34.

[0039] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing a gel material by a vertical mill production process, characterized in that: The following steps are involved: S1: Put water slag, steel slag and desulfurized gypsum into the loading bin according to the ratio of 60%-70%, 10%-20% and 20%-30% respectively, and send them to the feeding port of the vertical mill through the conveying equipment; S2: The motor drives the grinding disc to rotate through the reducer, and the material falls from the discharge port to the center of the grinding disc; under the action of centrifugal force, the material moves to the edge of the grinding disc and is crushed by the grinding roller; among the ground materials, the coarse powder will fall back to the grinding disc for re-grinding, while the fine powder will enter the powder classifier with the air flow; S3: The ground materials are dried with the help of hot air provided by the hot air furnace; the dried materials are selected by the powder classifier, and the materials that meet the fineness requirements are sent to the dust collector for collection and stored in the finished product warehouse; S4: For materials that need to be ground again, they are transported to the elevator through a sealed return device, and the elevator inputs the materials into the vertical mill for further grinding, forming a closed loop.

2. The method for preparing gel material by vertical mill production process according to claim 1, characterized in that: The sealed material return device comprises a support (1), a sealed cabin (2), a belt conveyor mechanism (3) and a screw conveyor mechanism (4); the sealed cabin (2) is fixed on the support (1), and the sealed cabin (2) comprises an upper cabin body (21), a lower cabin body (22) and a discharge cabin body (23) which are connected to each other; the cross-sectional shape of the upper cabin body (21) in the longitudinal direction is a square, and the cross-sectional shape of the lower cabin body (22) in the longitudinal direction is a triangle, and the bottom end thereof adopts an arc transition; a feed port is provided at one end of the top wall of the upper cabin body (21), and the discharge cabin body (23) is connected to one end of the upper cabin body (21) away from the feed port, and the upper cabin body (21) and the lower cabin body (22) are both connected to the discharge cabin body (23). The belt conveyor mechanism (3) is installed in the upper cabin body (21), and the screw conveyor mechanism (4) is installed in the lower cabin body (22).

3. The method for preparing gel material by vertical mill production process according to claim 1, characterized in that: The belt conveying mechanism (3) comprises a first motor (31), a driving roller (32), a driven roller (33) and a belt (34); the driving roller (32) and the driven roller (33) are rotatably mounted in the upper cabin (21); the belt (34) is wound around the outer sides of the driving roller (32) and the driven roller (33); the first motor (31) is fixed to the outer wall of the upper cabin (21) and its output shaft is connected to the driving roller (32) to drive the belt (34) to operate; the screw conveying mechanism (4) comprises a screw conveying rod (41) and a second motor (42); the screw conveying rod (41) is rotatably connected to the arc-shaped transition portion of the lower cabin (22); the second motor (42) is bolted to the outer wall of one end of the lower cabin (22) away from the discharge cabin (23); the output shaft of the second motor (42) is connected to the screw conveying rod (41) to drive the screw conveying rod (41) to rotate.

4. The method for preparing gel material by vertical mill production process according to claim 1, characterized in that: Two anti-sticking material components (5) are arranged in the upper cabin (21), and the two anti-sticking material components (5) are installed at the two ends of the belt conveying mechanism (3). The anti-sticking material components (5) include two wedge blocks (51) and a steel wire (52). The two wedge blocks (51) are arranged on both sides of the belt conveying mechanism (3) and fixed on the inner wall of the upper cabin (21); the two ends of the steel wire (52) are respectively fixedly connected to the two wedge blocks (51), and the steel wire (52) is arranged in close contact with the top wall of the outer ring of the belt (34).

5. The method for preparing gel material by vertical mill production process according to claim 1, characterized in that: The side wall of the wedge block (51) close to the belt (34) is formed with a wedge surface (511), and the wedge surface (511) is inclined in the direction close to the belt conveying mechanism (3) in the material conveying direction, and the edge of the belt (34) is located in the middle of the bottom side of the wedge surface (511); the bottom surface of the wedge block (51) located outside the belt (34) is fixed with an eaves plate (53), and the eaves plate (53) includes a flat plate (531) and an inclined plate (532) connected to each other, and the flat plate (531) is attached to the top wall of the inner edge of the belt (34), and the inclined plate (532) is arranged to be inclined downward in a direction away from the belt (34).

Images