Converter steelmaking coarse ash recycling and quantitative batching device

Abstract

The utility model relates to material conveying of a steel mill, in particular to a converter steelmaking coarse ash recycling and quantitative batching device. By accurately controlling coarse ash supply, the resource utilization rate and the production efficiency are remarkably improved, and the production cost and the environmental pollution are reduced. The device reduces iron loss and improves the recovery rate of metal resources. Comprising a coarse ash bin for storing coarse ash. A spiral propeller is arranged below the coarse ash bin, and a discharging port of the coarse ash bin is communicated with a feeding port of the spiral propeller. A discharge port of the spiral propeller is communicated with a feeding port of the bucket elevator, and a discharge port of the bucket elevator is communicated with an inlet of the storage bin; and the bucket elevator is used for lifting coarse ash to a certain height, and then the coarse ash enters the storage bin from a discharge port of the bucket elevator. A quantitative bin is arranged below the storage bin and is used for realizing quantitative feeding of the coarse ash; and a material receiving hopper is arranged below the quantitative bin and is used for receiving coarse ash from the quantitative bin.

Description

Technical Field

[0001] The utility model relates to material transportation in a steel plant, in particular to a quantitative batching device for recovering coarse ash from converter steelmaking. Background Art

[0002] During the converter steelmaking process, oxygen blowing and decarburization will generate a large amount of iron-containing smoke. After the smoke is recovered through dry dust removal technology, converter dust ash is obtained. This dust ash is rich in iron, calcium oxide, magnesium oxide and other components that are extremely important to the steelmaking process, of which the iron content is about 50%. The iron loss caused by the dust generated in the converter steelmaking process has become a significant problem, which not only causes the waste of metal resources, but also is a valuable secondary resource. The effective use of these dust ashes can not only alleviate the pressure of resource shortage, but also reduce smelting costs and solve the problems of resource waste and environmental pollution caused by improper waste disposal. At present, steel mills generally treat converter dust as part of the iron-containing raw materials and use it as raw material for blast furnaces.

[0003] During this process, converter dust is not directly returned to the converter for recycling. Instead, it is transported by truck to the sintering plant for feeding. Secondary recycling for blast furnace feeding carries high transportation and labor costs, and inefficiently utilizes secondary resources. Some steel mills also add direct coarse ash recovery equipment to the coarse ash silo discharge port behind the converter, installing bucket elevators to recycle the coarse ash back into the converter's high-level silo. However, neither of these recovery and distribution methods can automatically meter the feed to the converter, and the lack of in-process storage of materials hinders material transportation timelines and converter production efficiency. Summary of the Invention

[0004] The utility model aims to solve the defects in the prior art and provides a quantitative batching device for recovering coarse ash from converter steelmaking.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a converter steelmaking coarse ash recovery and quantitative batching device, comprising a coarse ash bin for storing coarse ash.

[0006] A screw propeller is provided below the coarse ash bin, and a discharge port of the coarse ash bin is communicated with a feed port of the screw propeller.

[0007] The discharge port of the screw propeller is connected to the feeding port of the bucket elevator, and the discharge port of the bucket elevator is connected to the inlet of the storage bin; the bucket elevator is used to lift the coarse ash to a certain height and then enter the storage bin through the discharge port of the bucket elevator.

[0008] A quantitative bin is provided below the storage bin for achieving quantitative feeding of coarse ash; a receiving hopper is provided below the quantitative bin for receiving the coarse ash from the quantitative bin.

[0009] Furthermore, the coarse ash bin is connected to the screw propeller through a discharge channel, and the discharge channel is used to allow the coarse ash to flow into the screw propeller by gravity.

[0010] Furthermore, the outlet of the storage bin is connected to the inlet of the quantitative bin, and the outlet of the quantitative bin is connected to the inlet of the receiving hopper.

[0011] Furthermore, the quantitative bin is equipped with an upper plug-in valve and a lower plug-in valve for controlling the material, and the upper plug-in valve is located above the lower plug-in valve.

[0012] Furthermore, the outlet of the receiving hopper is connected to the inlet of the quantitative bin, and the outlet of the quantitative bin is located above the receiving hopper.

[0013] Furthermore, the screw propeller includes a screw propeller housing and a propulsion screw rotatably connected to the screw propeller housing. The propulsion screw is driven to rotate by a motor to propel the coarse ash to the right; the screw propeller discharge port is located at the end of the screw propeller.

[0014] Furthermore, five sensors are included for detecting the status of different positions, wherein:

[0015] Sensor 1 is set at the feeding port of the bucket elevator to detect whether there is material blockage.

[0016] Sensor 2 is arranged on the top side wall of the storage bin to detect whether the coarse ash in the storage bin is full.

[0017] Sensor three is set on the bottom side wall of the storage bin to detect whether coarse ash flows out.

[0018] Sensor 4 is set on the bottom side wall of the quantitative bin to detect whether the material is present.

[0019] Sensor 5 is arranged on the top side wall of the quantitative bin to detect the state of the material in the quantitative bin.

[0020] Furthermore, the storage bin has a corrugated outer wall.

[0021] Furthermore, a vibrator is installed at the lower part of the storage bin.

[0022] Compared with the prior art, the utility model has beneficial effects.

[0023] This new device significantly improves resource utilization and production efficiency by precisely controlling the coarse ash supply, reducing production costs and environmental pollution. It also reduces iron loss and improves metal resource recovery. The automated quantitative feeding system reduces manual intervention and reliance on purchased raw materials, further reducing smelting costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0025] Figure 1 This is a main view of a converter steelmaking coarse ash recovery and quantitative batching device.

[0026] Figure 2 This is a main view of the storage bin of a converter steelmaking coarse ash recovery and quantitative batching device.

[0027] Figure 3 It is a schematic diagram of the connection between the coarse material bin and the screw propeller.

[0028] In the figure, 1 is the coarse ash bin, 2 is the discharge channel, 3 is the motor, 4 is the screw propeller cover, 5 is the propulsion screw, 6 is the screw propeller discharge port, 7 is sensor one, 8 is the bucket elevator feeding port, 9 is the bucket elevator, 10 is the bucket elevator discharge port, 11 is the storage bin, 12 is sensor two, 13 is the corrugated outer wall, 14 is the vibrator, 15 is sensor three, 16 is the upper plug valve, 17 is the quantitative bin, 18 is the lower plug valve, 19 is sensor four, 20 is the receiving hopper, 21 is the corrugated discharge hose, 22 is sensor five, and 23 is the discharge port. DETAILED DESCRIPTION

[0029] In order to better understand the technical solution of the present invention, a specific implementation plan is provided as follows; and the following solution is only for illustration.

[0030] like Figure 1-3 As shown, the utility model of the converter steelmaking coarse ash recovery and quantitative dosing device includes a coarse ash bin 1 for storing coarse ash. A screw propeller is provided below the coarse ash bin 1, and the discharge port of the coarse ash bin 1 is connected to the feed port of the screw propeller. The discharge port 6 of the screw propeller is connected to the feeding port 8 of the bucket elevator 9, and the discharge port 10 of the bucket elevator is connected to the inlet of the storage bin; the bucket elevator 9 is used to lift the coarse ash to a certain height and then enter the storage bin 11 through the discharge port 10 of the bucket elevator. A quantitative bin 17 is provided below the storage bin 11 for quantitative feeding of coarse ash; a receiving hopper 20 is provided below the quantitative bin 17 for receiving coarse ash from the quantitative bin 17. The coarse ash bin 1 is connected to the screw propeller through a discharge channel 2, and the discharge channel 2 is used to allow the coarse ash to flow into the interior of the screw propeller by gravity.

[0031] It also includes five sensors for detecting the status of different locations, including:

[0032] Sensor 1 7 is provided at the feeding port 8 of the bucket elevator to detect whether there is material blockage.

[0033] The second sensor 12 is arranged on the top side wall of the storage bin 11 and is used to detect whether the coarse ash in the storage bin 11 is full.

[0034] Sensor three 15 is arranged on the bottom side wall of the storage bin to detect whether coarse ash flows out.

[0035] Sensor 4 19 is arranged on the bottom side wall of the quantitative bin 17 to detect whether the material is present.

[0036] The sensor 5 22 is arranged on the top side wall of the quantitative bin 17 and is used to detect the state of the material in the quantitative bin.

[0037] Example 1: A corrugated discharge hose 21 is provided between the coarse ash bin 1 and the discharge channel 2 to ensure that the coarse ash flows smoothly into the screw propeller.

[0038] Example 2: The outlet of the storage bin 11 is connected to the inlet of the quantitative bin 17, and the outlet of the quantitative bin 17 is connected to the inlet of the receiving hopper 20. A wear-resistant lining is provided at the bottom of the receiving hopper 20 to extend the service life of the equipment and reduce maintenance costs.

[0039] The dosing bin 17 is equipped with an upper gate valve 16 and a lower gate valve 18 for material control, with the upper gate valve 16 positioned above the lower gate valve 18. The outlet of the receiving hopper 20 is connected to the inlet of the dosing bin 17, and the outlet of the dosing bin 17 is located above the receiving hopper. A sensor 5 22 is installed in the dosing bin 17 to monitor the state of the material inside. When the trigger detects the presence of material, the upper gate valve 16 closes and the lower gate valve 18 opens to discharge the material. When the sensor 4 19 detects the absence of material, the lower gate valve closes, completing the dosing process.

[0040] Example 3: The screw propeller includes a screw propeller housing 4 and a propulsion screw 5 rotatably connected thereto. The propulsion screw 5 is driven by a motor 3 to propel the coarse ash to the right. A screw propeller discharge port 6 is located at the end of the screw propeller. The motor 3 is a variable-frequency motor, and the operating speed of the propulsion screw 5 can be adjusted according to actual needs, achieving more accurate coarse ash supply.

[0041] Example 4: The storage bin 11 has a corrugated outer wall 13, and a vibrator 14 is installed at the lower part of the storage bin 11. When sensor 3 detects that there is no coarse ash at the storage bin discharge port, the vibrator starts to promote the flow of coarse ash and prevent material blockage. The bucket elevator 9 can lift the coarse ash to a height of about 28 meters, and starts working for about 3 minutes after each blowing, without affecting the normal production of the converter. The bucket elevator quickly lifts the coarse ash after each blowing to ensure the continuity of production; the combination of the corrugated outer wall structure and the vibrator ensures the smooth flow of coarse ash, avoids blockage, and enhances the stability and reliability of the system. Multiple sensors monitor the status of key points in real time to ensure the safe operation of the system.

[0042] Explanation of working process and working principle:

[0043] 1. After each furnace of steel blowing is completed, the dust removal operator operates the electronic control equipment in the main control room, first starts the bucket elevator to start working, and then starts the motor. The motor drives the propulsion screw to push the coarse ash material in the coarse ash bin to the right in a quantitative manner, and the coarse ash enters the feeding port of the bucket elevator from the discharge port.

[0044] 2. The lower part of the coarse ash bin is connected to the outer cover of the screw propeller. The coarse ash collected in the coarse ash bin flows into the interior of the screw propeller by its own gravity.

[0045] 3. During operation, the bucket elevator lifts the coarse ash to 28 meters. After the coarse ash reaches the top of the bucket elevator, it flows into the storage bin along the bucket elevator outlet.

[0046] 4. A certain volume of coarse ash can be stored in the storage bin, which is convenient for timely feeding of the converter.

[0047] 5. When it is necessary to quantitatively dose the converter, open the upper plug valve and the coarse ash enters the quantitative bin. When sensor five is triggered to detect the presence of material, it means that the quantitative bin is full. Close the upper plug valve and open the lower plug valve. The coarse ash falls into the receiving hopper under the action of gravity. When sensor four is triggered to detect that there is no material, close the lower plug valve. The above action is repeated once to complete the quantitative discharging process.

[0048] 6. The purpose of sensor 1 is to detect whether the feeding port of bucket elevator is blocked, sensor 2 is to detect whether the coarse ash in storage bin is full, and sensor 3 is to detect whether there is coarse ash at the discharge port of storage bin.

[0049] 7. The lower end of the storage bin features a corrugated outer wall structure. When sensor 3 detects that there is no coarse ash at the bin outlet, the vibrator activates, driving the lower end of the bin to resonate, facilitating the rapid replenishment of the coarse ash in the bin downwards (preventing the bin from being unable to flow down to the metering bin by its own weight). The corrugated outer wall structure, under the vibration of the vibrator, increases the vibration frequency and amplitude of the lower end of the bin, facilitating the downward flow of coarse ash.

[0050] 8. Each batch of steel needs to be supplemented with about 600 kg of coarse ash. After the blowing is completed, the bucket elevator is started to lift the coarse ash for about 3 minutes, which does not affect the normal production of the converter.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. Therefore, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A converter steelmaking coarse ash recovery and quantitative batching device, characterized in that: It includes a coarse ash bin (1) for storing coarse ash; A screw propeller is provided below the coarse ash bin (1), and a discharge port of the coarse ash bin (1) is connected to a feed port of the screw propeller; The screw propeller discharge port (6) is connected to the feeding port (8) of the bucket elevator (9), and the bucket elevator discharge port (10) is connected to the inlet of the storage bin; the bucket elevator (9) is used to lift the coarse ash to a certain height and then enter the storage bin (11) through the bucket elevator discharge port (10); A quantitative bin (17) is provided below the storage bin (11) for achieving quantitative feeding of coarse ash; and a receiving hopper (20) is provided below the quantitative bin (17) for receiving the coarse ash from the quantitative bin (17).

2. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The coarse ash bin (1) is connected to the screw propeller via a discharge channel (2), and the discharge channel (2) is used to allow the coarse ash to flow into the interior of the screw propeller by gravity.

3. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The outlet of the storage bin (11) is connected to the inlet of the quantitative bin (17), and the outlet of the quantitative bin (17) is connected to the inlet of the receiving hopper (20).

4. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The quantitative bin (17) is equipped with an upper plug-in valve (16) and a lower plug-in valve (18) for controlling material, and the upper plug-in valve (16) is located above the lower plug-in valve (18).

5. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The outlet of the receiving hopper (20) is connected to the inlet of the quantitative bin (17), and the outlet of the quantitative bin (17) is located above the receiving hopper.

6. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The screw propeller comprises a screw propeller housing (4) and a propulsion screw (5) rotatably connected to the screw propeller housing (4); the propulsion screw (5) is driven to rotate by a motor (3) and is used to propel the coarse ash to the right; and the screw propeller discharge port (6) is located at the end of the screw propeller.

7. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: It also includes five sensors for detecting the status of different locations, including: A sensor (7) is provided at the feeding port (8) of the bucket elevator to detect whether there is material blockage; The second sensor (12) is arranged on the top side wall of the storage bin (11) and is used to detect whether the coarse ash in the storage bin (11) is full; Sensor three (15) is provided on the bottom side wall of the storage bin to detect whether coarse ash flows out; Sensor 4 (19) is provided on the bottom side wall of the quantitative bin (17) for detecting whether the material exists; The sensor five (22) is arranged on the top side wall of the quantitative bin (17) and is used to detect the state of the material in the quantitative bin.

8. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The storage bin (11) has a corrugated outer wall (13).

9. The converter steelmaking coarse ash recovery and quantitative batching device according to claim 1, characterized in that: The lower part of the storage bin (11) is equipped with a vibrator (14).

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