Automatic conveying system and conveying method for furnace slag of heating furnace

Abstract

The invention relates to the technical field of heating furnace slag conveying, and discloses an automatic conveying system and method for heating furnace slag. The automatic furnace slag conveying system of the heating furnace comprises a furnace mouth conveying chain machine and a collection chain machine, one end of the furnace mouth conveying chain machine is arranged under a furnace mouth of the heating furnace, the other end of the furnace mouth conveying chain machine is arranged over a conveying chain of the collection chain machine, a discharging port is formed in the tail end of the collection chain machine, and a discharging port is formed in the tail end of the collection chain machine. A hopper is arranged under the discharging port, a driving air cylinder is arranged on one side of the discharging port and used for driving the discharging port to swing periodically, a weight sensor is arranged at the bottom of the hopper, and a material level measuring sensor is arranged at the top of the hopper. The device has the advantages of preventing slag accumulation on the chain plate, improving working efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of heating furnace slag, and particularly to an automatic conveying system and a conveying method for heating furnace slag. Background Art

[0002] As a core equipment of the hot rolling steel production line, the heating furnace undertakes the key task of heating the steel billet to the rolling temperature. During the heating process, a large amount of iron oxide (commonly known as "slag") is generated on the surface of the steel billet due to high-temperature oxidation reaction, and it needs to be continuously discharged through the slag outlet at the bottom of the furnace to maintain the cleanliness inside the furnace. However, the traditional slag cleaning operation faces multiple challenges: operators need to manually operate the blocking valve of the slag outlet in a harsh environment of high temperature (the ambient temperature often exceeds 50°C) and high dust, use a hand-pushed tipping cart to pick up the slag and then transfer it to a centralized hopper for treatment. In this process, the frequent opening and closing of the valve and the pushing and transporting of the cart not only have a high labor intensity and low efficiency, but also have safety hazards such as scalding and mechanical collision, and dust exposure is likely to cause occupational health problems.

[0003] Therefore, an automatic conveying system and a conveying method for heating furnace slag are provided to solve the above problems. Summary of the Invention

[0004] The main object of the present invention is to solve the multiple challenges faced by the traditional slag cleaning operation: operators need to manually operate the blocking valve of the slag outlet in a harsh environment of high temperature (the ambient temperature often exceeds 50°C) and high dust, use a hand-pushed tipping cart to pick up the slag and then transfer it to a centralized hopper for treatment. In this process, the frequent opening and closing of the valve and the pushing and transporting of the cart not only have a high labor intensity and low efficiency, but also have safety hazards such as scalding and mechanical collision, and dust exposure is likely to cause occupational health problems.

[0005] In a first aspect, the present invention provides an automatic conveying system and a conveying method for heating furnace slag, and the automatic conveying system for heating furnace slag includes:

[0006] A furnace mouth conveying chain machine and an assembly chain machine. One end of the furnace mouth conveying chain machine is arranged directly below the furnace mouth of the heating furnace, and the other end of the furnace mouth conveying chain machine is arranged directly above the transport chain of the assembly chain machine. The tail end of the assembly chain machine is provided with a discharge port, a hopper is arranged directly below the discharge port, a driving cylinder is arranged on one side of the discharge port, and the driving cylinder is used to drive the discharge port to swing periodically. A weight sensor is arranged at the bottom of the hopper, and a material level measurement sensor is arranged at the top of the hopper.

[0007] Optionally, a pneumatic valve is arranged at the furnace mouth of the heating furnace, and the pneumatic valve is used to control the opening and closing degree of the furnace mouth of the heating furnace.

[0008] Optionally, a pressure sensor is arranged on each chain plate of the assembly chain machine.

[0009] Optionally, the drive mechanism of the collecting chain machine is a variable-speed motor with adjustable speed.

[0010] In a second aspect, the present application also provides an automatic conveying method for the slag of a heating furnace. The automatic conveying method for the slag of the heating furnace includes:

[0011] S1. Obtain the distribution information of the heating furnaces, and obtain the distances between the heating furnaces according to the distribution information of the heating furnaces.

[0012] S2. Respectively obtain the real-time slag discharge amount information at the furnace mouths of each heating furnace, obtain the real-time speed of the motor of the collecting chain machine, and calculate the additional loading mass required for a single chain plate when passing through the furnace mouth of the heating furnace at this speed.

[0013] S3. Taking a single chain plate as a unit, determine whether the loading amount of any chain plate exceeds the limit loading amount after completing the journey from the first furnace mouth to the last furnace mouth. If so, adjust the speed of the chain machine.

[0014] S4. Determine whether the loading amount of any chain plate exceeds the limit loading amount after completing the journey from the first furnace mouth to the last furnace mouth after the speed adjustment. If so, repeat steps S2 - S3.

[0015] S5. If, after the motor of the collecting chain machine is adjusted to the maximum, there are still chain plates whose loading amounts exceed the limit loading amount after completing the journey from the first furnace mouth to the last furnace mouth, then adjust the slag discharge amount at the furnace mouth of the heating furnace until the loading amounts of all the chain plates after completing the journey from the first furnace mouth to the last furnace mouth do not exceed the limit loading amount.

[0016] Optionally, send the speed information of the collecting chain machine that meets the condition that the loading amounts of all the chain plates after completing the journey from the first furnace mouth to the last furnace mouth do not exceed the limit loading amount to an external control unit, and the external control unit controls the drive motor of the collecting chain machine to operate according to this speed information.

[0017] Optionally, it further includes sending the slag discharge amount information of all the furnace mouths of the heating furnaces that meets the condition that the loading amounts of all the chain plates after completing the journey from the first furnace mouth to the last furnace mouth do not exceed the limit loading amount to an external control unit, and the external control unit controls the pneumatic valve to achieve this slag discharge amount information.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention uses fully automated control to replace manual operation, which is intelligent; the precise control of the pneumatic valve combined with the PLC logic significantly reduces the equipment failure rate and maintenance cost; it reduces the risk of personnel exposure in high-temperature environments and improves the safety production level; the remote monitoring and centralized management functions enhance the stability of the production line and reduce the downtime; the design of the oscillating cylinder effectively solves the problem of material accumulation and extends the service life of the equipment. Description of the Drawings

[0020] Figure 1 This is the system working flowchart of the present invention.

[0021] Figure 2 This is the overall structure diagram of the system of the present invention.

[0022] Figure 3 This is the structural schematic diagram of the furnace mouth conveying chain machine of the system of the present invention. Specific embodiments

[0023] The present invention provides an automatic conveying system and method for heating furnace slag. The automatic conveying system for heating furnace slag includes: a furnace mouth conveying chain machine 2 and an aggregate chain machine 1. One end of the furnace mouth conveying chain machine is arranged directly below the furnace mouth of the heating furnace, and the other end of the furnace mouth conveying chain machine is arranged directly above the conveying chain of the aggregate chain machine. The tail end of the aggregate chain machine is provided with a discharge port, a hopper 3 is arranged directly below the discharge port, a driving cylinder is arranged on one side of the discharge port, and the driving cylinder is used to drive the discharge port to swing periodically. A weight sensor is arranged at the bottom of the hopper, and a material level measuring sensor is arranged at the top of the hopper. The main purpose of the present invention is to solve multiple challenges faced by traditional slag cleaning operations: operators need to manually operate the plugging valve of the slag discharge port in a harsh environment of high temperature (the ambient temperature often exceeds 50°C) and high dust, use a hand-pushed tipping car to pick up the furnace slag and then transfer it to a centralized hopper for processing. In this process, frequent valve opening and closing, and cart handling not only have a high labor intensity and low efficiency, but also pose safety hazards such as scalding and mechanical collisions, and dust exposure is likely to cause occupational health problems.

[0024] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order different from that shown or described herein. In addition, the terms "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] For ease of understanding, the specific process of the embodiment of the present invention is described below. An embodiment of the automatic conveying system for heating furnace slag provided by the present invention includes:

[0026] The furnace mouth conveying chain machine and the collecting chain machine, one end of the furnace mouth conveying chain machine is arranged directly below the furnace mouth 4 of the heating furnace, the other end of the furnace mouth conveying chain machine is arranged directly above the conveying chain of the collecting chain machine, the tail end of the collecting chain machine is provided with a discharge port, a hopper is arranged directly below the discharge port, a driving cylinder is arranged on one side of the discharge port, and the driving cylinder is used to drive the discharge port to swing periodically. A weight sensor is arranged at the bottom of the hopper, and a material level measuring sensor is arranged at the top of the hopper.

[0027] Optionally, a pneumatic valve 5 is arranged at the furnace mouth of the heating furnace, and the pneumatic valve is used to control the opening and closing degree of the furnace mouth of the heating furnace.

[0028] Optionally, a pressure sensor is arranged on each chain plate of the collecting chain machine.

[0029] Optionally, the driving mechanism of the collecting chain machine is a variable-speed motor with adjustable speed.

[0030] The above describes the automatic conveying system of the heating furnace slag in the embodiments of the present invention. Next, the automatic conveying method of the heating furnace slag in the embodiments of the present invention will be described. Please refer to Figure 2 , the embodiments of the automatic conveying method of the heating furnace slag in the embodiments of the present invention include:

[0031] S1. Obtain the distribution information of the heating furnaces, and obtain the distances between the heating furnaces according to the distribution information of the heating furnaces.

[0032] S2. Respectively obtain the real-time slag discharge amount information at the furnace mouth of each heating furnace, obtain the real-time speed of the motor of the collecting chain machine, and calculate the additional loading mass required for a single chain plate when passing through the furnace mouth of the heating furnace at this speed.

[0033] S3. Taking a single chain plate as a unit, judge whether the loading amount of any chain plate exceeds the limit loading amount after completing the transportation from the first furnace mouth to the last furnace mouth. If so, adjust the speed of the chain machine.

[0034] S4. Judge whether the loading amount of any chain plate exceeds the limit loading amount after completing the transportation from the first furnace mouth to the last furnace mouth after the speed adjustment. If so, repeat steps S2 - S3.

[0035] S5. If there are still chain plates whose loading amounts exceed the limit loading amount after the motor of the collecting chain machine is adjusted to the maximum, then adjust the slag discharge amount at the furnace mouth of the heating furnace until the loading amounts of all chain plates after completing the transportation from the first furnace mouth to the last furnace mouth do not exceed the limit loading amount.

[0036] Optionally, the rotational speed information of the traveling grate that satisfies the condition that the loading amount of all the chain plates does not exceed the limit loading amount after completing the loading from the first furnace mouth to the last furnace mouth is sent to an external control unit, and the external control unit controls the driving motor of the traveling grate to operate according to this rotational speed information.

[0037] Optionally, it further includes sending the slag discharge amount information of all the heating furnace mouths that satisfies the condition that the loading amount of all the chain plates does not exceed the limit loading amount after completing the loading from the first furnace mouth to the last furnace mouth to an external control unit, and the external control unit controls the pneumatic valve to implement this slag discharge amount information.

[0038] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic conveying system for the slag of a heating furnace, characterized in that, It includes a furnace mouth conveying chain machine and an assembly chain machine. One end of the furnace mouth conveying chain machine is arranged directly below the furnace mouth of the heating furnace, and the other end of the furnace mouth conveying chain machine is arranged directly above the transport chain of the assembly chain machine. The tail end of the assembly chain machine is provided with a discharge port, a hopper is arranged directly below the discharge port, a driving cylinder is arranged on one side of the discharge port, and the driving cylinder is used to drive the discharge port to swing periodically. A weight sensor is arranged at the bottom of the hopper, and a material level measuring sensor is arranged at the top of the hopper.

2. The automatic conveying system for the heating furnace slag according to claim 1, wherein A pneumatic valve is arranged at the furnace mouth of the heating furnace, and the pneumatic valve is used to control the opening and closing degree of the furnace mouth of the heating furnace.

3. The automatic conveying system for the heating furnace slag according to claim 2, characterized in that, A pressure sensor is arranged on each chain plate of the assembly chain machine.

4. The automatic conveying system for the heating furnace slag according to claim 3, wherein The driving mechanism of the assembly chain machine is a variable-speed motor with adjustable speed.

5. An automatic conveying method for the heating furnace slag, which is used for the automatic conveying system of the heating furnace slag as described in claim 4, is characterized in that, The automatic conveying method for the slag of the heating furnace includes: S1. Obtain the distribution information of the heating furnaces, and obtain the distance between the heating furnaces according to the distribution information of the heating furnaces; S2. Respectively obtain the real-time slag discharge amount information at the furnace mouth of each heating furnace, obtain the real-time speed of the motor of the assembly chain machine, and calculate the additional loading mass required for a single chain plate when passing through the furnace mouth of the heating furnace at this speed; S3. Taking a single chain plate as a unit, judge whether the loading amount of any chain plate exceeds the limit loading amount after completing the transportation from the first furnace mouth to the last furnace mouth. If so, adjust the speed of the chain machine; S4. Judge whether the loading amount of any chain plate exceeds the limit loading amount after completing the transportation from the first furnace mouth to the last furnace mouth after the speed adjustment. If so, repeat steps S2 - S3; S5. If there are still chain plates whose loading amount exceeds the limit loading amount after the motor of the assembly chain machine is adjusted to the maximum, then adjust the slag discharge amount at the furnace mouth of the heating furnace until the loading amount of all chain plates after completing the transportation from the first furnace mouth to the last furnace mouth does not exceed the limit loading amount.

6. The automatic conveying method of the heating furnace slag according to claim 5, characterized in that, It also includes sending the speed information of the assembly chain machine that meets the condition that the loading amount of all chain plates after completing the transportation from the first furnace mouth to the last furnace mouth does not exceed the limit loading amount to an external control unit, and the external control unit controls the driving motor of the assembly chain machine to operate according to this speed information.

7. The automatic conveying method of the heating furnace slag according to claim 6, characterized in that, It also includes sending the slag discharge amount information of all furnace mouths of the heating furnaces that meet the condition that the loading amount of all chain plates after completing the transportation from the first furnace mouth to the last furnace mouth does not exceed the limit loading amount to an external control unit, and the external control unit controls the pneumatic valve to achieve this slag discharge amount information.

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