Stepping heating furnace double-row slab tapping positioning control method

Abstract

The invention relates to the technical field of ferrous metallurgy, in particular to a stepping type heating furnace double-row plate blank tapping positioning control method, which comprises the following steps: firstly, acquiring the width and steel loading position information of double-row plate blank bodies in a furnace, monitoring the moving state of the plate blank bodies in real time through a laser detection device, and when detecting that the double-row plate blank bodies exist at the same time, controlling the steel loading position information of the double-row plate blank bodies; the offset delta of the center line of the plate blank is calculated by taking the rear edge position of the double-row plate blank as a reference, then the brake slip compensation amount S is dynamically calculated, the offset delta and the compensation amount S are synthesized to generate a total value Q, the tapping machine is controlled to execute the translation positioning operation of the Q value, and the plate blank is conveyed to the middle position of a pipeline roller way. According to the method, the position of the trailing edge of the plate blank is used as a datum point for positioning control, positioning deviation caused by the plate blanks with different widths is effectively avoided, a dynamic braking slip compensation mechanism is introduced, the positioning precision under different speed conditions is improved, and accurate positioning of the double-row plate precision is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of iron and steel metallurgy, and in particular to a steel tapping positioning control method for double-row slabs in a walking beam heating furnace. Background Art

[0002] In the steel production process, the walking beam heating furnace is an important equipment for heating slabs. In the prior art, when there are two rows of slabs of different widths in the heating furnace, the slab position often shifts during the steel tapping process due to the difference in width between the two slabs. In particular, when the narrow slab is located close to the furnace door, it is easy to trigger the side plate guard or get stuck in the rough descaling device. This situation will not only cause damage to the production line and equipment, but may also require the slab furnace to be reheated, resulting in a waste of resources.

[0003] The commonly used control method at present is to calculate the steel-out position based on the slab width. This method has obvious defects when processing double rows of slabs with different widths: since the movement distance of the double rows of steel in the heating furnace is consistent, the wide slab triggers the steel-out laser first, while there is still a distance between the narrow slab and the steel-out laser. If the steel-out position is calculated according to the width of the wide slab, it is easy to cause the slab to be close to the furnace door, increasing the risk of equipment damage. Summary of the invention

[0004] In order to solve the above-mentioned technical problems and overcome the shortcomings of the prior art, the present invention provides a method for controlling the steel-out positioning of double-row slabs in a walking-beam heating furnace. The method adopts the rear edge of the slab as a reference point for positioning control, thereby effectively avoiding the positioning deviation caused by slabs of different widths. The method introduces a dynamic braking slip compensation mechanism to improve the positioning accuracy under different speed conditions, thereby achieving precise positioning of the double-row slabs and reducing the risk of equipment damage.

[0005] The present invention provides a method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace, comprising the following steps: (1) Obtain the width and steel loading position information of the double-row slab in the furnace; (2) The movement status of the slab is monitored in real time by a laser detection device. When two rows of slabs are detected to exist at the same time, the double-row control mode is triggered; (3) Taking the rear edge position of the double-row slab as the reference and combining the fixed distance L between the steel loader and the laser detection device, calculate the slab centerline offset Δ=W / 2±δ, where W is the current slab width and δ is the adjustment parameter; (4) According to the slab conveying speed v, dynamically calculate the braking slip compensation amount S=0.05v²+20, where v is in m / s and S is in mm; (5) The offset Δ and the compensation S are combined to generate a total value Q = Δ + S, which controls the steel-making machine to perform the translation positioning operation of the Q value and transport the slab to the middle position of the pipeline roller.

[0006] The technical solution further defined in the present invention is: Furthermore, the laser detection device described in step (2) includes an operating side laser (OSL) and a transmission side laser (DSL) respectively installed on two opposite sides of the front of the furnace door, and the double-row detection threshold is that the interval between the two laser signals exceeds 300 mm.

[0007] Furthermore, the value range of the adjustment parameter δ in step (3) is 50-70 mm.

[0008] Furthermore, the calculation of the brake slip compensation amount in step (4) also includes a temperature correction factor. When the furnace temperature is greater than 1100° C., the brake slip compensation amount S increases by 10-15%.

[0009] Furthermore, when double rows of slabs are detected, the steel tapping control mode is switched from a slab width calculation mode to a slab trailing edge distance calculation mode.

[0010] Further, the parameter δ is adjusted to 60 mm.

[0011] The beneficial effects of the present invention are: The steel-out positioning control method for double-row slabs in a walking-beam heating furnace provided by the present invention adopts the rear edge position of the slab as a reference point for positioning control, thereby effectively avoiding positioning deviations caused by slabs of different widths, and introducing a dynamic braking slip compensation mechanism to improve the positioning accuracy under different speed conditions. The influence of temperature on braking performance is increased by a temperature correction factor, and control accuracy is further improved, thereby achieving precise positioning of double-row slabs, reducing the risk of equipment damage, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic flow chart of a method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to the present invention; Figure 2 It is a schematic diagram of the position of double-row slabs during transportation; Figure 3 Schematic diagram of the layout of the laser detection device. DETAILED DESCRIPTION

[0013] like Figure 1-3 As shown, the specific steps of the double-row slab steel tapping positioning control method of the walking beam heating furnace of the present invention are as follows: The system first obtains the width parameters and steel loading position information of the double-row slabs in the furnace, which comes from the slab tracking data of the production management system.

[0014] The operating side laser (OSL) and the transmission side laser (DSL) are installed on the furnace door water pump to monitor the physical movement status of the plates in real time. When the signal interval between the two lasers exceeds 300mm, the system recognizes it as a double-row plate state and triggers the automatic double-row control mode.

[0015] The calculation method of the centerline offset of the slab is as follows: taking the rear edge position of the double-row slab as the reference point, combined with the fixed ratio L of the steel loader and the laser detection device, the calculation formula is: Δ=W / 2±δ, where W is the current slab width, δ is the adjustment parameter, and the value range is 50-70mm.

[0016] The calculation of the brake slip compensation takes the speed factor into account: S=0.05v²+20, where v is the slab pipeline speed (m / s) and S is the compensation amount (mm). When the furnace temperature exceeds 1100℃, the compensation amount needs to be increased by 10-15%.

[0017] The final positioning control is achieved through the total compensation value Q=Δ+S, and the steel machine performs translation positioning operations according to the calculated Q value.

[0018] The method of the invention has been actually applied in a certain steel enterprise. Since it was put into use in January 2024, there has been no situation where the guard plate is affected after the double-row slabs of different widths are discharged. The slabs can be stably transported to the middle position of the roller, which significantly improves production efficiency and equipment safety.

[0019] In some optional implementations of the present invention, the method for determining the adjustment parameter δ is further optimized: The placement of slabs of different widths on the roller after steelmaking was recorded, and the parameters were adjusted according to the placement conditions. After multiple experimental verifications, the optimal value of the layout parameters was finally determined to be 60mm.

[0020] Through the optimization of this embodiment, the accuracy of the steel tapping positioning of the double-row slabs is further improved, so that slabs of different widths can accurately fall into the middle position of the roller table.

[0021] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A method for controlling the steel tapping positioning of double-row slabs in a walking beam heating furnace, characterized in that: The following steps are involved: (1) Obtain the width and steel loading position information of the double-row slab in the furnace; (2) The movement status of the slab is monitored in real time by a laser detection device. When two rows of slabs are detected to exist at the same time, the double-row control mode is triggered; (3) Taking the rear edge position of the double-row slab as the reference and combining the fixed distance L between the steel loader and the laser detection device, calculate the slab centerline offset Δ=W / 2±δ, where W is the current slab width and δ is the adjustment parameter; (4) According to the slab conveying speed v, dynamically calculate the braking slip compensation amount S=0.05v²+20, where v is in m / s and S is in mm; (5) The offset Δ and the compensation S are combined to generate a total value Q = Δ + S, which controls the steel-making machine to perform the translation positioning operation of the Q value and transport the slab to the middle position of the pipeline roller.

2. The method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to claim 1, characterized in that: The laser detection device described in step (2) includes an operating side laser and a transmission side laser respectively installed on two opposite sides of the front of the furnace door, and the double-row detection threshold is that the interval between the two laser signals exceeds 300 mm.

3. The method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to claim 1, characterized in that: The value range of the adjustment parameter δ in step (3) is 50-70 mm.

4. The method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to claim 1, characterized in that: In step (4), when the furnace temperature is greater than 1100°C, the brake slip compensation amount S increases by 10-15%.

5. The method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to claim 1, characterized in that: When double rows of slabs are detected, the steel tapping control mode is switched from the slab width calculation mode to the slab trailing edge distance calculation mode.

6. The method for controlling steel tapping positioning of double-row slabs in a walking beam heating furnace according to claim 1, characterized in that: The adjustment parameter δ is 60 mm.

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