Iron-containing cold charge feeding device

Abstract

This utility model discloses a feeding device for iron-containing cold materials, including a high-level discharge section. A first belt feeder is provided at the lower end of the high-level discharge section. The outlet of the first belt feeder is connected to a discharge hopper. The outlet of the discharge hopper is connected to a second belt feeder. The outlet of the second belt feeder is connected to a collection hopper. The collection hopper includes a hopper and a bottom discharge section connected to the hopper. The bottom of the bottom discharge section is connected to the inlet of a discharge chute. The outlet of the discharge chute is matched to a converter. The high-level discharge section includes a gantry support fixed to a steel truss. A discharge hopper is provided between the gantry supports. Weighing sensors are fixedly installed on both sides of the discharge hopper on the steel truss platform. The weighing sensors are fixedly connected to the discharge hopper.

Description

Technical Field

[0001] This utility model belongs to the field of steel smelting process control technology, specifically relating to a feeding device for iron-containing cold materials. Background Technology

[0002] In the converter steelmaking process, iron-containing cold materials (including sintered return ore, etc.) are added into the furnace through a high-level silo and a fan-shaped gate structure. Traditional fan gates rely on the opening of mechanical gates to regulate the flow rate, which has two major drawbacks: poor control accuracy: the opening degree and flow rate have a non-linear relationship, and the actual addition amount deviates by more than ±15%; and no speed classification: it can only be operated fully open / fully closed, and cannot achieve coordinated control of high-speed, high-flow feeding and low-speed, fine compensation.

[0003] Furthermore, there is a risk of splashing. Excessive feeding can lead to splashing of molten iron, and waste of slag is caused by the unstable addition of iron-containing materials. Excessive addition of dolomite and lime is required to adjust the furnace temperature, resulting in cost waste.

[0004] In view of the above factors, an iron-containing cold material feeding device is provided to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a feeding device for iron-containing cold materials to solve the problems mentioned in the background art.

[0006] The purpose of this utility model is achieved through the following technical solution: a feeding device for iron-containing cold materials, including a high-level discharge section, a first belt feeder is provided at the lower end of the high-level discharge section, the outlet of the first belt feeder is connected to the unloading bin, the outlet of the unloading bin is connected to a second belt feeder, and the outlet of the second belt feeder is connected to a collection bin.

[0007] The collection bin includes a bin and a bottom discharge section connected to the bin. The bottom of the bottom discharge section is connected to the inlet of the discharge chute, and the outlet of the discharge chute is matched to the converter.

[0008] Furthermore, the high-level discharge section includes a gantry support, which is fixed on a steel structure truss. A discharge hopper is provided between the gantry supports. Weighing sensors are fixedly installed on both sides of the discharge hopper on the steel structure truss platform, and the weighing sensors are fixedly connected to the discharge hopper.

[0009] The weighing sensor is connected to a junction box via a connecting wire, and the junction box is electrically connected to the PLC control cabinet via a connecting wire.

[0010] Furthermore, the weighing sensor is a CZL-YB-5 / 20 series sensor.

[0011] Furthermore, the bottom of the discharge hopper of the high-level discharge section is equipped with a double-door start-up structure. The two sides of the bottom of the discharge hopper are connected to the double doors by hinges. The double doors are located on the outside of the discharge hopper and are connected to the cylinder by hinges. The cylinder is connected to the discharge hopper by hinges.

[0012] Furthermore, vibrators are installed on both sides of the bottom discharge section, and the vibrators are connected to the bottom discharge section by high-strength bolts. The bolts are 10.9 grade M24 bolts with a preload of 310kN.

[0013] The installation angle between the vibrator and the bottom discharge section is 10° ± 0.5°.

[0014] Furthermore, the bottom discharge section is inclined along the discharge chute (6), and the bottom inner wall of the bottom discharge section is fixedly provided with a stepped structure. The bottom discharge section is a trough structure. The material of the bottom discharge section is not less than Q345B. The upper cover plate of the bottom discharge section is an arc-shaped cover plate with a thickness of not less than 3mm and the side plate thickness is not less than 10mm.

[0015] Furthermore, the side plate of the bottom discharge section is lined with a buffer wear-resistant plate. The liner is made of NM500 steel plate with a thickness of not less than 12mm and a width of ≥300mm.

[0016] Furthermore, a discharge chute is provided between the high-level discharge section and the first belt feeder. The discharge chute includes a receiving bin opening and a discharge chute fixedly connected to the receiving bin opening. The discharge chute is provided with several channels communicating with the receiving bin opening.

[0017] The end of the discharge chute is located at the inlet position of the first belt feeder.

[0018] Furthermore, the receiving hopper and the high-level discharge section are fixedly installed in a closed space, which is a hollow shell structure, and the shell structure of the closed space is provided with a side door connected by a hinge.

[0019] The receiving hopper and the high-level discharge section are arranged vertically and horizontally within a closed space.

[0020] The application method of the iron-containing cold material feeding device includes the following steps;

[0021] Iron-containing cold material is conveyed to the high-level discharge section, where it is accurately weighed. The discharge hopper of the high-level discharge section has a double-door opening structure at the bottom. After weighing, the bottom of the discharge hopper is opened, and the double doors are connected by hinges on both sides. The iron-containing cold material enters the first belt feeder through the discharge chute set between the high-level discharge section and the first belt feeder. The outlet of the first belt feeder is connected to the unloading bin. The outlet of the unloading bin is connected to the second belt feeder. The outlet of the second belt feeder is connected to the collection bin.

[0022] A dual-mass resonant electromagnetic vibrating feeder is used for vibrating feeding at the bottom discharge section of the collection bin.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This utility model is equipped with a first belt feeder and a second belt feeder to buffer and discharge materials at the high-level discharge section, reducing the impact on the converter when materials are fed into the converter from a high position.

[0025] This utility model is equipped with a vibrator that can improve the speed of material feeding in use. The vibrator is installed on both sides of the bottom discharge section and is connected to the bottom discharge section by high-strength bolts. The bolts are 10.9 grade M24 bolts with a preload of 310kN. The installation angle between the vibrator and the bottom discharge section is 10°±0.5° downward. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0027] Figure 2 This is a schematic diagram of the connection between the high-level discharge section and the PLC of this utility model;

[0028] Figure 3 This is an enlarged schematic diagram of the convergence chamber of this utility model;

[0029] Figure 4 This is a schematic diagram of the material pouring trough of this utility model;

[0030] Figure 5 This is a schematic diagram of the bottom stepped structure of the bottom discharge section of this utility model. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] like Figure 1-5 As shown, an iron-containing cold material feeding device includes a high-level discharge section 1. A first belt feeder 2 is provided at the lower end of the high-level discharge section 1. The outlet of the first belt feeder 2 is connected to the unloading bin 3. The outlet of the unloading bin 3 is connected to a second belt feeder 4. The outlet of the second belt feeder 4 is connected to a collection bin 5.

[0035] The collection bin 5 includes a bin 6 and a bottom discharge section 7 connected to the bin 6. The bottom of the bottom discharge section 7 is connected to the inlet of the discharge chute 8, and the outlet of the discharge chute 8 is matched to the converter.

[0036] To facilitate downward weighing and output through the high-level discharge section during use, the high-level discharge section 1 includes a gantry support 9, which is fixed on a steel structure truss. A discharge hopper 10 is arranged between the gantry supports 9. Weighing sensors 11 are fixedly installed on both sides of the discharge hopper 10 on the steel structure truss platform. The weighing sensors 11 are fixedly connected to the discharge hopper 10.

[0037] A hydraulic cylinder is installed on the gantry support. The output end of the hydraulic cylinder is connected to the top cover of the discharge hopper. The hydraulic cylinder also includes a pump station (not shown in the figure) connected to it. The hydraulic cylinder is electrically connected to the PLC control cabinet. Through linkage with the PLC, the hydraulic cylinder is controlled to move accurately at specific positions, speeds and forces.

[0038] The weighing sensor 11 is connected to the junction box via a connecting wire, and the junction box is electrically connected to the PLC control cabinet 12 via a connecting wire.

[0039] The weighing sensor 11 is a CZL-YB-5 / 20 series sensor.

[0040] In use, the double doors are connected via cylinders, allowing control of the opening and closing angle. The bottom of the discharge hopper 10 of the high-position discharge section 1 is equipped with a double-door start-up structure. The bottom sides of the discharge hopper 10 are connected to the double doors 13 via hinges. The double doors 13 are located on the outside of the discharge hopper 10 and are connected to the cylinder via hinges. The cylinder is connected to the discharge hopper 10 via hinges.

[0041] The cylinder is electrically connected to the PLC control cabinet, which controls the opening and closing degree of the double doors.

[0042] To facilitate improved material feeding speed during use, vibrators 14 are installed on both sides of the bottom discharge section 7. The vibrators 14 are connected to the bottom discharge section 7 by high-strength bolts. The bolts are 10.9 grade M24 bolts with a preload of 310kN.

[0043] The installation angle between the vibrator 14 and the bottom discharge section 7 is 10° ± 0.5°.

[0044] The vibrator 14 can operate at high speed and low speed. It uses a dual-mass resonant electromagnetic vibratory feeder (model GZ7), which includes a main vibration spring assembly with a stiffness coefficient designed to be 48kN / mm±5%, forming a secondary resonance system with the excitation force. The electromagnetic vibrator has a rated power of 7.5kW, an adjustable frequency range of 18-50Hz, and an adjustable excitation force of 35kN (20-50kN). Amplitude-flow linearization technology: The transfer function Q = 1.05A + 0.8δ is established through experimental calibration, where Q is the flow rate (kg / s), A is the amplitude (mm), and δ is the material layer thickness correction coefficient.

[0045] To facilitate buffering of the material inside the bottom discharge section 7 during use, the bottom discharge section 7 is inclined along the discharge chute 8, and a stepped structure 15 is fixedly provided on the bottom inner wall of the bottom discharge section 7. The bottom discharge section 7 is a trough structure, and the material of the bottom discharge section 7 is not lower than Q345B. The upper cover plate of the bottom discharge section 7 is an arc-shaped cover plate to increase the internal space and prevent the material from impacting the upper cover plate. The thickness is not less than 3mm, and the side plate thickness is not less than 10mm.

[0046] To enhance durability during use, the side plates of the bottom discharge section 7 are lined with wear-resistant buffer plates. The lining plates are made of NM500 steel plates with a thickness of not less than 12mm and a width of ≥300mm. This reduces wear on the side plates of the bottom discharge section trough.

[0047] In order to facilitate buffered discharge during use, a discharge chute 16 is provided between the high-level discharge section 1 and the first belt feeder 2. The discharge chute 16 includes a receiving port 17 and a discharge chute 18 fixedly connected to the receiving port 17. The discharge chute 18 is provided with several channels communicating with the receiving port 17.

[0048] The end of the discharge chute 18 is located at the inlet position of the first belt feeder 2.

[0049] To reduce dust generation from falling materials during use, the receiving hopper 17 and the high-level discharge section 1 are fixedly installed in a closed space. This closed space is a hollow shell structure, and a side-opening door with a hinged connection is provided on the shell structure of the closed space.

[0050] The receiving hopper 17 and the high-level discharge section 1 are arranged vertically and horizontally within a closed space.

[0051] A feeding device for iron-containing cold materials specifically includes the following steps;

[0052] Iron-containing cold material is conveyed to the high-level discharge section, where it is accurately weighed. The discharge hopper of the high-level discharge section has a double-door opening structure at the bottom. After weighing, the bottom of the discharge hopper is opened, and the double doors are connected by hinges on both sides. The iron-containing cold material enters the first belt feeder through the discharge chute set between the high-level discharge section and the first belt feeder. The outlet of the first belt feeder is connected to the unloading bin. The outlet of the unloading bin is connected to the second belt feeder. The outlet of the second belt feeder is connected to the collection bin.

[0053] A dual-mass resonant electromagnetic vibrating feeder is used for vibrating feeding at the bottom discharge section of the collection bin.

[0054] The setup of double doors and vibrators enables coordinated control of high-speed, high-flow feeding and low-speed, fine-compensation, without the risk of splashing.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An iron-containing cold shot feeder, characterized by: It includes a high-level discharge section (1), and a first belt feeder (2) is provided at the lower end of the high-level discharge section (1). The outlet of the first belt feeder (2) is connected to the unloading bin (3). The outlet of the unloading bin (3) is connected to a second belt feeder (4). The outlet of the second belt feeder (4) is connected to a collection bin (5). The collection bin (5) includes a bin (6) and a bottom discharge section (7) connected to the bin (6). The bottom of the bottom discharge section (7) is connected to the inlet of the discharge chute (8), and the outlet of the discharge chute (8) is matched on the converter.

2. The iron-containing cold material feeding device according to claim 1, characterized in that: The high-level discharge section (1) includes a gantry support (9), which is fixed on a steel structure truss. A discharge hopper (10) is provided between the gantry supports (9). Weighing sensors (11) are fixedly installed on both sides of the discharge hopper (10) on the steel structure truss platform. The weighing sensors (11) are fixedly connected to the discharge hopper (10). The weighing sensor (11) is connected to the junction box via a connecting wire, and the junction box is electrically connected to the PLC control cabinet (12) via a connecting wire.

3. The iron-containing cold material feeding device according to claim 2, characterized in that: The weighing sensor (11) is a CZL-YB-5 / 20 series sensor.

4. The iron-containing cold material feeding device according to claim 3, characterized in that: The bottom of the discharge hopper (10) of the high-level discharge section (1) is set with a double-door start-up structure. The bottom two sides of the discharge hopper (10) are connected to the double doors (13) by hinges. The double doors (13) are located on the outside of the discharge hopper (10) and are connected to the cylinder by hinges. The cylinder is connected to the discharge hopper (10) by hinges.

5. The iron-containing cold material feeding device according to claim 4, characterized in that: Vibrators (14) are installed on both sides of the bottom discharge section (7). The vibrators (14) are connected to the bottom discharge section (7) by high-strength bolts. The bolts are 10.9 grade M24 bolts with a preload of 310kN. The installation angle between the vibrator (14) and the bottom discharge section (7) is 10° ± 0.5° downward.

6. The iron-containing cold material feeding device according to claim 5, characterized in that: The bottom discharge section (7) is inclined along the discharge chute (8), and the bottom inner wall of the bottom discharge section (7) is fixedly provided with a stepped structure (15). The bottom discharge section (7) is a trough structure. The material of the bottom discharge section (7) is not lower than Q345B. The upper cover plate of the bottom discharge section (7) is an arc-shaped cover plate with a thickness of not less than 3mm and the side plate thickness is not less than 10mm.

7. The iron-containing cold material feeding device according to claim 6, characterized in that: The side plate of the bottom discharge section (7) is lined with a buffer wear-resistant plate. The liner is made of NM500 steel plate with a thickness of not less than 12mm and a width of ≥300mm.

8. The iron-containing cold material feeding device according to claim 7, characterized in that: A discharge chute (16) is provided between the high-level discharge section (1) and the first belt feeder (2). The discharge chute (16) includes a receiving bin (17) and a discharge chute (18) fixedly connected to the receiving bin (17). The discharge chute (18) is provided with several channels communicating with the receiving bin (17). The end of the discharge chute (18) is located at the inlet position of the first belt feeder (2).

9. The iron-containing cold material feeding device according to claim 8, characterized in that: The receiving hopper (17) and the high-level discharge section (1) are fixedly installed in a closed space. The closed space is a hollow shell structure, and a side door with a hinged connection is provided on the shell structure of the closed space. The receiving hopper (17) and the high-level discharge section (1) are arranged vertically and vertically within a closed space.

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