Efficient utilization system for powder conveying

Abstract

The utility model discloses a powder conveying efficient utilization system which comprises a circulating material tank, a material tank support and a discharging chute, the circulating material tank is placed on the material tank support, and the bottom of the material tank support is connected with the discharging chute. The circulating material tank comprises a square enclosure frame, sealing steel plates are fixed to the side portion and the top of the square enclosure frame, a feeding port is formed in the sealing steel plate located on the top, a sealing cover plate is detachably connected to the feeding port, a gate frame is integrally arranged at the bottom of the square enclosure frame, and a throttling gate plate is connected to the gate frame in an inserted mode. The charging bucket support comprises a supporting column, a deck plate is fixed to the top of the supporting column, a discharging port is formed in the middle of the deck plate, a charging bucket fence is arranged at the top of the discharging port, and a gate operation hole is formed in the position, corresponding to the throttling gate, of the charging bucket fence. A connecting ring is arranged at the bottom of the discharging opening, and a corrugated pipe is fixedly connected to the connecting ring; the discharging chute comprises an articulated chute with the pipe diameter gradually reduced and a vibration motor installed on the articulated chute, the end, with the larger pipe diameter, of the articulated chute is connected with the corrugated pipe, and the end, with the smaller pipe diameter, of the articulated chute is connected with a downstream gathering stock bin.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and in particular relates to a powder material conveying and utilizing system. Background Art

[0002] Limestone and dolomite are important industrial raw and auxiliary materials, and are even more important auxiliary materials for the steel metallurgical industry. They themselves and the calcined clinker play an irreplaceable role in sintering, pelletizing, steelmaking and other process links. Their main function is to adjust the slag basicity and fluidity, promote metal reduction reactions, and remove harmful impurities such as P and S.

[0003] Limestone and dolomite (called calcium-magnesium raw materials) are generally calcined into active lime and light-burned dolomite for use. However, in order to reduce costs, some companies also use limestone and dolomite lump ore when the converter has abundant heat (high molten iron temperature, high iron consumption, high silicon content in molten iron, etc.). In addition, recent studies have found that when the above raw materials are used directly in the furnace, the calcium oxide and magnesium oxide produced by decomposition in the furnace are highly active and easy to slag, and the metallurgical effect is better than that of pre-calcined materials. For refining furnaces, the decomposition of raw materials produces carbon dioxide, which promotes slag foaming to better cover the ladle liquid surface, promote heat preservation, buried arc and improve heating efficiency; the disadvantage is that the decomposition of raw materials has a large cooling effect on the molten pool, which is not conducive to temperature control, and the use of raw materials for a long time will increase the power consumption of the process.

[0004] Generally, converters and electric furnaces only use lump raw materials, not powder materials. The reasons are: the powder material transportation and unloading process are prone to dust and spillage; the high-level silo + electric vibrating feeder mode is prone to dust; the powder material below 5 mm will be sucked in large quantities when it is added from the feeding chute connected to the flue, which not only increases the burden on the dust removal system and increases equipment failures, but also causes material waste. Therefore, calcium magnesium powder materials are mostly used for sintering, flue gas desulfurization in power plants or sintering processes, and cement enterprise batching. Due to the small number of industrial enterprises in some areas, on the one hand, the powder materials are often not fully utilized, and a large amount of accumulation is generated every year. On the other hand, in order to produce lump materials, part of the powder materials have to be taken out during the mining or crushing process. The utilization of calcium magnesium raw powder materials is called an industry problem. First, due to the low price, the expensive briquetting method cannot be used; second, the dust is easy to be raised during the reverse transportation process; third, the supply cost is too high due to the frequent unloading and overturning, which is not suitable for this reverse transportation mode. The powdery characteristics of calcium magnesium powder materials have become the difficulty and bottleneck restricting its large-scale use.

[0005] However, although calcium magnesium powder has many disadvantages, it also has advantages. The advantages mentioned above are good decomposition reactivity and easy slag formation when directly calcined in the furnace. In addition, the raw powder is easy to mix and pelletize with other powders, and processed into various functional preparations, which is another advantage. For example, some companies use the method of pressing calcium magnesium raw powder with aluminum ash, recycled cryolite, etc. as a slag regulator for converters and refining furnaces. Some companies mix calcium magnesium raw powder with fine carbon powder and press it into balls to produce converter final slag modifiers, etc., all of which have achieved the effect of efficient use of powder.

[0006] In summary, the key to the utilization of calcium magnesium raw powder is to solve the problem of low-cost and low-dust transportation, and secondly, to recycle calcium magnesium raw powder. If these problems are solved and used properly, calcium magnesium powder may become a profit growth point. However, there is currently no low-cost and dust-free powder transportation mode and powder addition mode from the silo, and technical innovation is needed in this regard. Utility Model Content

[0007] The utility model aims to provide a powder material conveying and efficient utilization system to realize the low-cost and less dust transportation of powder materials.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A powder material conveying and efficient utilization system comprises a circulating material tank, a material tank support and a material discharge chute, wherein the circulating material tank is placed on the material tank support, and the material discharge chute is connected to the bottom of the material tank support;

[0010] The circulating material tank comprises a square enclosure frame, the side and top of the square enclosure frame are fixed with sealing steel plates, a feed port is provided on the sealing steel plate at the top, a sealing cover plate is detachably connected to the feed port, a gate frame is integrally provided at the bottom of the square enclosure frame, and a throttling gate is plugged into the gate frame;

[0011] The material tank support comprises a support column, a table panel is fixed on the top of the support column, a material discharge port is provided in the middle of the table panel, a material tank enclosure is provided on the top of the material discharge port, a gate operating hole is provided on the material tank enclosure at a position corresponding to the position of the throttling gate; a connecting ring is provided at the bottom of the material discharge port, and a bellows is fixedly connected to the connecting ring;

[0012] The unloading chute includes a chute with a gradually decreasing diameter and a vibrating motor installed on the chute. The end of the chute with a larger diameter is connected to the bellows, and the end of the chute with a smaller diameter is connected to the downstream collecting silo.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. Provides a circulating material tank for low-cost transportation and use of powder materials, the materials are easy to obtain and the production difficulty is small.

[0015] Small capital investment, convenient lifting, high structural strength and rigidity; at the same time, the cubic structure can be easily transported by car and improve the loading rate;

[0016] 2. A material tank bracket is provided for use with a circulating material tank. The special design enables the circulating material tank to be parked reliably and opened and closed smoothly. The tank bracket is small in size, easy to make, requires little capital investment, requires little maintenance, has flexible placement, and is easy to lift and move.

[0017] 3. A vibration-type material discharge chute is provided. The design of the square corrugated hose and the combination of the vibration motor can ensure smooth material discharge after the throttle gate is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the circulation material tank of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle gate frame.

[0020] Figure 3 It is a structural schematic diagram of the material tank bracket of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the unloading chute of the utility model.

[0022] Figure 5 It is an application schematic diagram of the utility model.

[0023] In the figure, 1-circulation tank, 11-square frame, 12-sealing cover plate, 13-sealing steel plate, 14-reinforcement rib, 15-gate frame, 16-throttling gate, 17-support foot, 2-tank bracket, 21-tank enclosure, 22-table panel, 23-pillar, 24-gate operation hole, 25-bellows, 26-connecting ring, 27-ground plate, 3-discharge chute, 31-chute, 32-vibration motor. DETAILED DESCRIPTION

[0024] The present invention will be further explained below in conjunction with specific implementation methods.

[0025] like Figure 1-4 As shown, a powder material conveying and efficient utilization system includes a circulating material tank 1, a material tank bracket 2 and a material discharge chute 3. The circulating material tank 1 is placed on the material tank bracket 2, and the material discharge chute 3 is connected to the bottom of the material tank bracket 2.

[0026] The circulating material tank 1 includes a square frame 11, on the side and top of which sealing steel plates 13 are fixed, and a feed port is provided on the sealing steel plate 13 at the top, on which a sealing cover plate 12 is detachably connected, and a gate frame 15 is integrally provided at the bottom of the square frame 11, on which a throttling gate plate 16 is plugged; its function is to achieve low-cost transportation of powdered materials and control the material flow during use, and more than 100 of them are produced for recycling, and during operation, the next batch of full tanks has arrived at the site when the previous one has not been used up, so as to ensure smooth connection and continuous material supply.

[0027] The square enclosure 11 is welded from angle steel with a thickness of more than 5mm and a width of more than 50mm. The sealing steel plate 13 is made of 2mm steel plate, which is surrounded by the enclosure and welded to the enclosure to protect the enclosure and increase the strength of the tank. The side of the square enclosure 11 is also fixed with cross-arranged reinforcing ribs 14. Specifically, the four sides of the square enclosure 11 are welded with reinforcing ribs 14, and the reinforcing ribs 14 are welded to the sealing steel plate 13 and the enclosure. The gate frame 15 is an angle steel structure integrated with the square enclosure 11. It is a cavity structure welded by the side angle steel extension section plus several sections of the same angle steel and a steel plate with a thickness of more than 5mm, which is convenient for the throttling gate 16 made of medium carbon steel plate with a thickness of more than 10mm to be inserted therein to move so as to throttle the material flow. The support leg 17 is cut from a thick square tube and is vertically welded to the bottom surface of the gate frame 15 to support and protect the gate frame and facilitate forklift operation. The wire rope lifting lug is in a square C shape (not shown in the figure), welded to the angle steels on both sides of the square frame 11 and the vertical steel plate. After the wire rope loop enters from the notch of the square C-shaped lifting lug (about 1.2 times the diameter of the wire rope), the circulating material tank can be transported by crane. Unless there is manual intervention, the wire rope is not easy to fall out of the lifting lug. When the material tank is full of powder, the feed port is covered with a sealing cover plate 12 to reduce dust and prevent the influence of precipitation; Figure 1 As shown, the sealing cover plate 12 is connected to the tank body pin, and the sealing cover plate has a large deadweight, and the cover plate will not fall off the tank unless the pin is pulled out. The tank body is about 1 meter long, and is loaded with about 1.5 tons of powder. According to the material thickness and area, the weight of the entire tank body does not exceed 0.4 tons, which is less than 25% of the weight of the full tank, and can greatly reduce the transportation cost while ensuring the strength of the tank.

[0028] The material tank support 2 includes a pillar 23, a base plate 27 is fixed at the bottom of the pillar 23, a table panel 22 is fixed at the top of the pillar 23, a discharge port is opened in the middle of the table panel 22, a material tank enclosure 21 is arranged on the top of the discharge port, and a gate operating hole 24 is opened on the material tank enclosure 21 at a position corresponding to the position of the throttling gate 16; a connecting ring 26 is arranged at the bottom of the discharge port, and a bellows 25 is fixedly connected to the connecting ring 26.

[0029] The tank bracket 2 serves as a support for the circulating tank, facilitating the connection of the throttling plug of the throttling device at the bottom of the tank with the horizontal motion power mechanism, and providing a base for the unloading chute. The table panel 22 made of 20mm thick steel plate, the pillar 23 made of thick square tube and the reinforcing ribs made of steel plate are welded to form the basic structure of the bracket. The reinforcing ribs are welded with the pillar and the table, which plays a role in strengthening the structural strength and stability. A square unloading port is opened on the table panel 22, and a tank enclosure 21 is set on the top of the unloading port. After the circulating tank is dropped, it can be placed on the table panel 22, and it can be placed more firmly on the bracket under the protection of the tank enclosure 21 made of thick steel plate. A rectangular flat hole is opened on the front of the tank enclosure 21 to facilitate the movement of the throttling plug 16 of the circulating tank in and out. A ground plate 27 is welded at the bottom of the pillar, and a hole is opened on the ground plate 27. The tank bracket can be fixed on the concrete floor or platform with reserved screw holes by using ground angle bolts. The material tank support can be installed in the argon blowing station, refining furnace, residual slag recovery area after casting, etc., and used in conjunction with the circulating material tank.

[0030] The unloading chute 3 includes a chute 31 with a gradually decreasing diameter and a vibration motor 32 installed on the chute 31. The end of the chute 31 with a larger diameter is connected to the bellows 25, and the end of the chute 31 with a smaller diameter is connected to the downstream collecting silo.

[0031] The unloading chute 3 forms a connecting channel between the circulating material tank and the collecting silo, realizing the reliable falling of the powder. When unloading, since the chute 31 and the material tank bracket form a soft connection through the bellows 25, the vibration will not be transmitted to the upstream structure, avoiding equipment damage and improving the overall service life of the device. The vibration motor 32 is installed on a small platform welded on the chute, and is started when unloading, which can avoid clogging of the chute and ensure that most of the powder enters the collecting silo and finally enters the refining station for addition and use.

[0032] When the above device is used, Figure 5 As shown, take the application in the refining station as an example:

[0033] Limestone powder is loaded into circulating tanks at the production unit → the circulating tanks are loaded and transported to the steelmaking unit → the tanks are unloaded to the material warehouse or the area under the refining platform → the overhead crane is hoisted to the tank support of the refining platform → the horizontal switch machine and the throttling plug are connected → the horizontal switch machine is operated to add the powder to the summary silo (the vibration motor is started in a chain) → the horizontal switch machine is turned off to stop the feeding → the empty tank is transported back to the limestone and other powder production units by the truck. At the same time, the full tanks in the material area continue to be hoisted to the tank support for use. The entire process produces almost no smoke and dust, and a small amount of smoke and dust is captured and treated by the existing dust removal equipment on the roof of the plant.

[0034] In summary, the utility model can realize the low-cost and dust-free transportation of powdered materials, which helps mining and metallurgical enterprises to achieve green production and reduce environmental pressure.

Claims

1. A powder material conveying and efficient utilization system, characterized in that: It comprises a circulating material tank (1), a material tank support (2) and a material discharge chute (3), wherein the circulating material tank (1) is placed on the material tank support (2), and the bottom of the material tank support (2) is connected to the material discharge chute (3); The circulating material tank (1) comprises a square frame (11), a sealing steel plate (13) is fixed to the side and top of the square frame (11), a feed port is provided on the sealing steel plate (13) at the top, a sealing cover plate (12) is detachably connected to the feed port, a gate frame (15) is integrally provided at the bottom of the square frame (11), and a throttling gate plate (16) is plugged into the gate frame (15); The material tank support (2) comprises a support (23), a table panel (22) is fixed on the top of the support (23), a material discharge port is provided in the middle of the table panel (22), a material tank enclosure (21) is provided on the top of the material discharge port, a gate operating hole (24) is provided on the material tank enclosure (21) at a position corresponding to the position of the throttling gate (16); a connecting ring (26) is provided at the bottom of the material discharge port, and a bellows (25) is fixedly connected to the connecting ring (26); The material discharge chute (3) comprises a chute (31) with a gradually decreasing diameter and a vibration motor (32) mounted on the chute (31); the chute (31) has a larger diameter end connected to the bellows (25), and a smaller diameter end connected to a downstream collecting silo.

2. A powder material conveying and efficient utilization system as claimed in claim 1, characterized in that: Cross-arranged reinforcing ribs (14) are also fixed to the side of the square surrounding frame (11).

3. A powder material conveying and efficient utilization system as claimed in claim 1, characterized in that: The square frame (11) is also provided with hanging ears fixed on both sides of the top.

4. A powder material conveying and efficient utilization system as claimed in claim 1, characterized in that: Support feet (17) are also fixed at the four corners of the bottom of the gate frame (15).

5. A powder material conveying and efficient utilization system as claimed in claim 1, characterized in that: A foundation plate (27) is fixed to the bottom of the support (23).

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