Powder blanking device and production equipment
By combining segmented feed pipes and screw feeders, the problem of unstable material feeding in the production of tabular corundum was solved, achieving stable powder feeding and efficient operation of the pelletizer, thereby improving the sintering quality of the vertical kiln and the quality of the products.
Patent Information
- Application Number
- CN202422892846.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In the production of tabular corundum, the material feeding from the pelletizing machine tends to accumulate, leading to unstable feeding, which affects the quality and output of the pelletizing machine, and consequently affects the sintering quality of the vertical kiln.
The segmented feed pipe design, including a tapered pipe and a square-to-round diameter reducing pipe, combined with a screw feeder, ensures stable powder feeding and avoids accumulation and sticking, and provides stable material supply through the feeder.
It achieves stable powder feeding, with a feeding rate fluctuation range of less than 0.1t/h, which improves the production stability of the pelletizer and the sintering quality of the vertical kiln, and increases the quality of the mother pellets and the yield of fine-grained products.
Smart Images
Figure CN223444449U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of corundum production, and in particular relates to a powder feeding device and production equipment. Background Art
[0002] Tabular corundum is made from high-purity alumina, rapidly sintered in a vertical kiln at 1850-1950°C without any additives. Its primary crystalline phase is α-Al2O3. Corundum boasts high refractoriness, excellent thermal shock resistance, creep resistance, and spalling resistance, making it widely used as a high-performance refractory material in industries such as steel, foundry, petrochemicals, ceramics, and glass. In recent years, the trend toward environmentally friendly, green, high-performance, and cost-effective refractories has placed higher demands on basic refractory materials, inevitably increasing the scope and proportion of high-end refractories used. The use of refractory materials has also gradually shifted from shaped to amorphous refractories, placing even higher demands on tabular corundum.
[0003] At present, in the production of tabular corundum, the ball forming machine supplies raw balls for the vertical kiln, and the operation relies entirely on manual experience. However, when the ball forming machine is feeding, the 600-800 mesh ultrafine alumina ground by the ball mill is easy to stick to the warehouse wall, resulting in poor material discharge. When the alumina accumulates on the warehouse wall to a certain extent, it is easy to collapse under the action of gravity, and the material discharge port is blocked, resulting in unstable material discharge from the ball forming machine, sometimes large and sometimes small. In addition, due to the uneven operating level of the employees, the quality and output of the ball forming machine fluctuate, which in turn affects the sintering quality of the vertical kiln. Utility Model Content
[0004] The present application aims to at least to some extent solve the technical problem of easy accumulation of materials discharged from the pelletizing machine. To this end, the present application provides a powder feeding device and production equipment to effectively ensure the stable feeding of powder materials, and maintain the feeding amount per unit time within a smaller fluctuation range, thereby effectively improving the sintering quality of the vertical kiln and stabilizing corundum production.
[0005] In a first aspect, an embodiment of the present application provides a powder feeding device, which is provided at the feeding place of a feeder, and includes:
[0006] The feed pipe includes a connected conical pipe and a square-circle reducer, the conical pipe and the square-circle reducer are arranged vertically, the upper end of the conical pipe is larger than the lower end, the lower end of the conical pipe is connected to the upper end of the square-circle reducer, the upper end of the square-circle reducer is circular, the lower end of the square-circle reducer is square, and the circular diameter of the square-circle reducer is less than or equal to the side length of its square;
[0007] The feeding pipe is used to feed the material into the feeding machine, and the feeding pipe is connected to the lower end of the square and round reducer;
[0008] Feeder: The feeder is arranged on the feeding pipe.
[0009] In some embodiments, the feeder is a screw feeder, and the screw feeder is arranged horizontally.
[0010] In some embodiments, the lead length of the screw feeder is [140 mm, 160 mm].
[0011] In some embodiments, the inner diameter of the spiral channel of the screw feeder is [210 mm, 220 mm].
[0012] In some embodiments, the height between the lower end of the square-circular reducer and the rear bin of the feeder is [1.8m, 2.2m].
[0013] In some embodiments, the height of the tapered tube is [180 mm, 220 mm], and the inner diameter of the lower end of the tapered tube is [580 mm, 620 mm]; the height of the square-circular reducer is [1200 mm, 1600 mm].
[0014] In some embodiments, a first valve is further included, which is arranged at the joint between the square-circular reducer and the discharge pipe, and the first valve is used to open and close the channel between the square-circular reducer and the discharge pipe.
[0015] In some embodiments, a second valve is further included, which is provided on the discharge pipe. The second valve is located below the feeder, and the second valve is used to open and close the discharge pipe.
[0016] In some embodiments, the two ends of the discharge pipe are respectively a docking port and a discharge port, the docking port is connected to the square and round reducer, and the discharge port is connected to the feed point of the feed machine.
[0017] In a second aspect, an embodiment of the present application provides a production device, which includes a material forming machine and the above-mentioned unloading device, and the unloading device is connected to the feed point of the material forming machine.
[0018] It can be seen from the above technical solution that the beneficial effects of this application are:
[0019] 1. The present application adopts a segmented feeding pipe, which divides the feeding pipe into a conical pipe and a square-round reducer. The inclined surface of the conical pipe facilitates feeding and reduces powder overflow at the beginning of feeding. The square-round reducer changes the original inclined surface into a square-round reducer. The size design of the square-round reducer enables the powder to fall directly from the conical pipe into the feeding pipe, and then enter the feeder in the feeding pipe. The entered powder passes through the feeder at one time, which makes sealing easier and enables the feeder to supply stably, avoiding the sudden drop of powder accumulated on the inner wall during production and affecting the feeding amount of the feeder. This effectively ensures the stable feeding of the powder, and the feeding amount per unit time is maintained within a smaller fluctuation range, thereby effectively improving the sintering quality of the vertical kiln and stabilizing corundum production.
[0020] 2、The application can stably supply the material forming machine by setting the discharging device at the feeding inlet of the material forming machine, maintain the feeding in a smaller fluctuation range, control the green ball forming control precision to a certain extent, which is beneficial to the product forming, improves the mother ball quality, improves the denseness of the mature ball, guarantees the yield of the fine particle product, and effectively improves the product quality. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be simply introduced one by one below, and obviously, the drawings in the following description are some embodiments of the present application, and other embodiments and drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0022] Figure 1 An embodiment schematic view of the powder discharging device of the present application is shown;
[0023] Signs: 100, discharging device; 110, feeding pipe; 111, taper pipe; 112, square-to-round reducing pipe; 120, first valve; 130, discharging pipe; 131, butt joint; 132, discharging port; 140, feeder; 141, spiral feeder; 150, second valve. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application, and obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0025] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.
[0026] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0028] The present application will be described below in conjunction with the drawings and specific embodiments:
[0029] Please refer to Figure 1 The first aspect of the present application provides a powder feeding device 100, which is arranged at the feeding inlet of a material forming machine, comprising a feeding pipe 110, a feeding pipe 130 and a feeder 140. The device has simple structure and wide application range. The feeding pipe 110 comprises a communicating tapered pipe 111 and a square-round variable diameter pipe 112. The tapered pipe 111 and the square-round variable diameter pipe 112 are pipe fittings with different inner diameters. The tapered pipe 111 and the square-round variable diameter pipe 112 are vertically arranged. The tapered pipe 111 is in the shape of an inverted truncated cone. The upper end of the tapered pipe 111 is larger than the lower end. The wall thickness of the tapered pipe 111 is equal, that is, the inner diameter and the outer diameter of the upper end of the tapered pipe 111 are larger than the inner diameter and the outer diameter of the lower end of the tapered pipe 111. The lower end of the tapered pipe 111 is connected to the upper end of the square-round variable diameter pipe 112. The upper end of the square-round variable diameter pipe 112 is circular. The lower end of the square-round variable diameter pipe 112 is square. From top to bottom, the circular inner diameter of the square-round variable diameter pipe 112 changes to the side length of the square. The circular diameter of the square-round variable diameter pipe 112 is less than or equal to the side length of the square. At least the circular diameter is equal to the side length of the square. When they are equal, the inner wall changes to be vertically arranged, and the square-round variable diameter pipe 112 is like a square tube. The feeding pipe 130 is used to feed the material forming machine. The feeding pipe 130 is a square tube. The feeding pipe 130 is butt jointed with the lower end of the square-round variable diameter pipe 112. The butt joint is welded or bolted. Specifically, the two ends of the feeding pipe 130 are butt joint interface 131 and feeding port 132 respectively. The butt joint interface 131 is connected with the lower end of the square-round variable diameter pipe 112 and is fixed by welding. The feeding port 132 is connected with the feeding inlet of the material forming machine and is also fixed by welding. Other connection methods can also be used. The feeder 140 is arranged in the feeding pipe 130. Specifically, the feeder 140 is arranged in the middle of the feeding pipe 130. The feeder 140 uses existing feeding equipment, such as a screw feeder 141 and a scraper conveyor.
[0030] The existing powder discharging device adopts a tube wall structure of inclined discharging. When feeding, due to the friction of the wall and the molecular electrostatic adsorption force, the powder is easy to accumulate on the inner wall. After a large amount of accumulation, under the influence of gravity, the powder will suddenly drop in batches, causing large fluctuation in discharging and unstable discharging. There are other reasons, such as: artificial adjustment is not timely, the operation level of personnel is low, etc. The present application divides the feeding pipe 110 into a tapered pipe 111 and a square-round variable-diameter pipe 112. The inclined surface of the tapered pipe 111 facilitates discharging at the beginning and reduces powder overflow. The square-round variable-diameter pipe changes the original inclined surface into a square-round variable-diameter pipe 112. The size design of the square-round variable-diameter pipe 112 allows the powder to directly fall from the tapered pipe 111 into the discharging pipe 130, and then enter the feeder 140 in the discharging pipe 130. The powder enters the feeder 140 once, which makes it easier to seal the powder and allows the feeder 140 to stably supply, avoiding the influence of the sudden drop of the powder accumulated on the inner wall on the discharging amount of the feeder 140. This effectively ensures stable discharging of the powder, maintains the discharging amount in a small fluctuation range per unit time, and further effectively improves the sintering quality of the shaft kiln and stabilizes the production of corundum.
[0031] The present application changes the original inclined inner wall to a square mouth at the lower end. In this way, the powder discharged from the discharge port of the feeding pipe 110 is discharged in the vertical direction, avoiding friction and molecular adsorption between the powder and the inner wall. In this way, the powder will not stick to the wall. For the production of plate-shaped corundum products, the key to optimizing the apparent porosity is the ball forming process, which depends on the stability of the discharging or feeding. After adopting the present scheme, there is no powder collapse, and the fluctuation range of the discharging is <0.1 t / h, which significantly improves the stability of the discharging. At the same time, the present application also effectively solves the problems of unstable discharging of the ball forming machine and the loss of production and quality caused by factors such as untimely manual adjustment and low operation level of personnel.
[0032] In some embodiments, the feeder 140 is a screw feeder 141, which is horizontally arranged and has a mounting opening at an upper position in the middle of the discharging pipe 130. The screw feeder 141 is fixed to the discharging pipe 130 through the mounting opening. The screw feeder 141 is horizontally arranged so that the screw shaft is in the horizontal direction. The screw feeder 141 also adopts existing equipment. In some embodiments, the lead length of the screw feeder 141 is [140mm, 160mm], such as 140mm, 150mm or 160mm. In some embodiments, the inner diameter of the screw channel of the screw feeder 141 is [210mm, 220mm]. Compared with the existing screw feeder 141, the lead of the screw feeder 141 is shortened, and the inner diameter of the screw channel is increased, so that the stacking factor is increased, and the powder is more easily sealed, further ensuring stable discharging.
[0033] In some embodiments, the lower end of the square-to-round reducer 112 is [1.8 m, 2.2 m] above the back of the feeder 140, such as 1.8 m, 2.0 m or 2.2 m. With this design, the position of the feeding pipe 110 is set so that the lower end of the square-to-round reducer 112 is about 2 m above the back of the feeder 140, leaving a distance for the powder to fall. The powder falling from the square-to-round reducer 112 can continue to fall for a distance before reaching the back of the feeder 140, avoiding direct accumulation of powder. In some embodiments, the height of the tapered pipe 111 is [180 mm, 220 mm], such as 180 mm, 200 mm or 220 mm, and the inner diameter of the lower end of the tapered pipe 111 is [580 mm, 620 mm], such as 580 mm, 600 mm or 620 mm. The height of the square-to-round reducer 112 is [1200 mm, 1600 mm], such as 1200 mm, 1400 mm or 1600 mm. With the arrangement of the tapered pipe 111 and the square-to-round reducer 112, the powder can smoothly enter the square-to-round reducer 112 and then enter the discharge pipe 130 through the square-to-round reducer 112.
[0034] In some embodiments, the discharging device 100 further comprises a first valve 120 arranged at the joint of the square-to-round reducer 112 and the discharge pipe 130. The first valve 120 is used to open and close the passage between the square-to-round reducer 112 and the discharge pipe 130. The first valve 120 is a plug valve. The valve is arranged between the feeding pipe 110 and the discharge pipe 130, providing convenience for production and maintenance. When the valve is closed, it can achieve material stopping and locking. The plug valve is an existing valve device, such as a 500*500 mm large plug valve. In some embodiments, the discharging device 100 further comprises a second valve 150 arranged at the discharge pipe 130. The second valve 150 is located below the feeder 140. The second valve 150 is used to open and close the discharge pipe 130. The second valve 150 is a rotary valve that can adjust the opening and closing of the discharge pipe 130 through rotation. The second valve 150 is arranged at the lower middle position of the discharge pipe 130. The second valve 150 can open and close the powder discharged from the feeder 140. The rotary valve can quickly close the discharge pipe 130, achieving quick shutdown.
[0035] The second embodiment of the present application provides a production equipment, which includes a material forming machine and the above-mentioned unloading device 100, the unloading device 100 is connected to the feed of the material forming machine, specifically the unloading port 132 of the unloading pipe 130 is connected to the feed of the material forming machine, and the connection is fixed by welding or flange bolting. The unloading device 100 has a low cost and a simple control method. For production, it has the advantages of being simple, fast and efficient. The unloading device 100 is suitable for 600-1000 mesh powder production lines and is suitable for production processes with high metering requirements. After adopting the unloading device 100, it can stably convey materials to the material forming machine and accurately control the amount of material added. The production equipment can stabilize the process ratio parameters and promote stable product quality.
[0036] The existing production equipment uses an inclined feeding structure, which makes it easy for powder to accumulate and collapse during feeding. The feeding volume is sometimes large and sometimes small, which causes unstable production of the feeding machine, thus affecting the molding control and making the product quality prone to inconsistency. However, the present application sets the feeding device 100 at the feeding place of the feeding machine, which can stably feed the feeding machine and maintain the feeding within a relatively small fluctuation range. It can control the precision of raw ball molding to a certain extent, which is beneficial to the molding of the product, improves the quality of the mother ball, improves the density of the cooked ball, ensures the output of fine-grained products, and effectively improves the product quality. After the implementation of the project, the fine-grained output will increase by 5,000 tons / year. If the profit of fine-grained products is calculated at 100 yuan / ton, it can create a benefit of 500,000 yuan / year.
[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.
[0038] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0039] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A powder feeding device, characterized in that: Located at the feeding place of the material processing machine, including: The feed pipe (110) comprises a connected conical tube (111) and a square-circle reducing tube (112), wherein the conical tube (111) and the square-circle reducing tube (112) are arranged vertically, the upper end of the conical tube (111) is larger than the lower end, the lower end of the conical tube (111) is connected to the upper end of the square-circle reducing tube (112), the upper end of the square-circle reducing tube (112) is circular, the lower end of the square-circle reducing tube (112) is square, and the circular diameter of the square-circle reducing tube (112) is less than or equal to the side length of its square. A feeding pipe (130) is used for feeding the material forming machine, and the feeding pipe (130) is connected to the lower end of the square and round diameter reducing pipe (112); A feeder (140), wherein the feeder (140) is arranged on the feed pipe (130).
2. The powder material feeding device according to claim 1, characterized in that: The feeder (140) is a screw feeder (141), and the screw feeder (141) is arranged horizontally.
3. The powder material feeding device according to claim 2, characterized in that: The lead length of the screw feeder (141) is [140 mm, 160 mm].
4. The powder material feeding device according to claim 2, characterized in that: The inner diameter of the spiral channel of the screw feeder (141) is [210mm, 220mm].
5. The powder material discharging device according to any one of claims 1 to 4, characterized in that: The height between the lower end of the square-circular reducing pipe (112) and the rear bin of the feeder (140) is [1.8m, 2.2m].
6. The powder material feeding device according to claim 1, characterized in that: The height of the tapered tube (111) is [180 mm, 220 mm], and the inner diameter of the lower end of the tapered tube (111) is [580 mm, 620 mm]; the height of the square-radius reducer (112) is [1200 mm, 1600 mm].
7. The powder material feeding device according to claim 1, characterized in that: It also includes a first valve (120) disposed at the joint between the square-circular reducer (112) and the discharge pipe (130), and the first valve (120) is used to open and close the channel between the square-circular reducer (112) and the discharge pipe (130).
8. The powder material feeding device according to claim 1, characterized in that: It also includes a second valve (150) provided on the discharge pipe (130). The second valve (150) is located below the feeder (140). The second valve (150) is used to open and close the discharge pipe (130).
9. The powder material feeding device according to claim 1, characterized in that: The two ends of the discharge pipe (130) are a docking port (131) and a discharge port (132), respectively. The docking port (131) is connected to the square-circular reducer (112), and the discharge port (132) is connected to the feed point of the material forming machine.
10. A production equipment, characterized in that, It comprises a material forming machine and a material unloading device as described in any one of claims 1 to 9, wherein the material unloading device is connected to the feed point of the material forming machine.