Method for rapidly maintaining converter lining in converter production interval time by using loader

Abstract

The invention discloses a method for rapidly maintaining a converter lining in converter production interval time by using a loader, and belongs to the technical field of converter steelmaking field production. According to the method for rapidly maintaining the converter lining in the converter production interval time by using the loader, the weak part of the converter lining is maintained by turning over materials through the cooperation of the loader and the converter angle in the converter production interval time; wherein the inner size of the loader bucket is as follows: the length is 1-1.2 m, the width is 2.1-2.5 m, and the height is 0.9-1.15 m; and the tilting angle of the converter is controlled within the range of 12-18 degrees. The invention aims to provide the method for quickly maintaining the converter lining in the converter production interval time by using the loading machine, so that the condition that the converter charging cross crown block is insufficient is overcome, the weak part of the converter lining is maintained by turning over the material in the converter production interval time, the waiting interval is fully utilized, the safety of the converter lining is maintained, and the operation efficiency of the converter is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of converter steelmaking on-site production, and in particular relates to a method for quickly maintaining a converter lining during the converter production interval by using a loader. Background Art

[0002] During the converter steelmaking process, the furnace requires regular cleaning and maintenance to ensure efficient operation. Traditionally, this maintenance method involves using an overhead crane to lift a scrap steel trough or a reversing trough (with large materials pre-placed in the trough) and then transfer the large materials into the converter. This method relies heavily on the overhead crane. In recent years, as steel mills pursue extreme energy efficiency, increase converter operating rates, and fully utilize the time between ironwork and overhead crane operations for other converters, reversing converter maintenance has become increasingly important.

[0003] The basic layout of the converter charging bay in a normal steelmaking plant is to equip two converters with two hot metal cranes and one scrap crane. For three converters, three hot metal cranes and two scrap cranes are used to fully utilize the converter capacity. If three converters are equipped with two scrap cranes and one scrap crane, the converters will be waiting for the crane to be loaded, seriously affecting converter efficiency and hindering the use of cranes for charging and lining maintenance. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for quickly maintaining the lining of a converter using a loader during the interval between converter production, so as to overcome the situation where the converter charging cross crane is insufficient, and to turn over the material during the interval between converter production to maintain the weak parts of the lining, so as to make full use of the waiting interval, maintain the safety of the lining, and improve the operating efficiency of the converter.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention discloses a method for quickly maintaining a converter lining by using a loader during the intervals between converter production. During the intervals between converter production, the loader is used in coordination with the converter angle to turn over materials and maintain weak parts of the lining; wherein:

[0007] The internal dimensions of the loader bucket are 1-1.2 meters long, 2.1-2.5 meters wide, and 0.9-1.15 meters high;

[0008] The converter tilting angle is controlled in the range of 12°-18°.

[0009] Furthermore, the inner dimension of the loader bucket is 1.0 meter high.

[0010] Furthermore, the loader travel speed is ≤5km / h.

[0011] Furthermore, the maintenance frequency is: 1-3 times per 12-hour cycle, with 1-1.5 tons of material added each time.

[0012] Furthermore, the internal dimensions of the loader bucket are 1.1 meters in length, 2.3 meters in width, and 0.95 meters in height.

[0013] Furthermore, the inner dimensions of the loader bucket are adapted to a large material bag of 1m×1m×1m and ensure stable material loading.

[0014] Furthermore, it also includes an emergency stop button of the safety linkage mechanism, and the emergency stop button synchronously controls the tilting of the loader and the converter.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention can greatly improve the safety factor of the converter, and can be flexibly applied to the actual production process on site during production intervals to improve the efficiency of material turning and maintenance, which has important practical significance.

[0017] Key technical solutions and improvements of the present invention:

[0018] 1. Modify the loader bucket size: extend the bucket length from 0.9m to 1.1m to accommodate large material bags (1m×1m×1m) to ensure stable material loading;

[0019] 2. Collaborative operation process of loader and converter;

[0020] 3. The loader replaces the overhead crane to complete the transportation and dumping of large fabrics;

[0021] 4. By adjusting the angle of the converter mouth and coordinating with the loader bucket movement, the material can be accurately fed to the weak parts of the furnace lining;

[0022] 5. Safety linkage mechanism (emergency stop button synchronously controls the loader and converter tilting);

[0023] 6. Comparison between the present invention and the traditional solution:

[0024] Traditional solutions This patent solution Relying on overhead crane to transport scrap steel trough Independent operation using a modified loader The overhead crane has a high occupancy rate and needs to be stopped and waited Utilize production gaps for flexible operation and seamless production Feeding accuracy depends on overhead crane operation Bucket + converter angle coordinated control improves feeding accuracy by 30% DETAILED DESCRIPTION

[0025] A method for quickly maintaining a converter lining using a loader during a converter production interval comprises:

[0026] Before starting work, you must wear labor protection equipment for your position;

[0027] Check whether the vehicle is normal before operation, and the sound and light alarm must be operating normally throughout the operation;

[0028] The furnace crew on duty loaded the large fabrics into the loader bucket in advance;

[0029] The loader operator controls the loader to move near the converter body and adjusts the position and angle of the turning device;

[0030] The on-duty master controller adjusts the angle of the converter mouth according to the command;

[0031] The loader operator controls the bucket device to perform the material turning operation and transport the large fabric into the converter. When the loader leaves the tilting range of the converter, the loader performs the furnace shaking operation to spread the large fabric to the corresponding weak points. During operation, no one is allowed to be within the turning radius. During operation, a safe distance is maintained from surrounding personnel. The loader moves slowly to ensure safety.

[0032] In case of emergency, the operator can press the emergency stop button to immediately stop the loader and converter tilting movement;

[0033] After the operation is completed, the operator drives the loader away from the designated parking area near the converter furnace body and shuts down the system.

[0034] The dimensions of a large material bag are approximately 1 meter long, 1 meter wide, and 1 meter high. The internal dimensions of the loader bucket are 0.9 meters long, 2.3 meters wide, and 0.95 meters high. Extending the bucket length to 1.1 meters allows for the transport of large materials. This ensures the distance between the converter opening and the loader's telescopic, rotating, and lifting capabilities, ensuring stable loading of large materials into the converter lining.

[0035] Compared with the traditional method of using an overhead crane:

[0036] 1. Overhead crane resource bottleneck: When three converters share one scrap crane, the traditional method results in daily maintenance delays of up to 1.5 hours. This solution achieves zero crane occupancy. The crane's slow speed causes maintenance materials to melt and harden during transport to the converters, resulting in wasted material.

[0037] 2. Space adaptation problem: After the bucket is lengthened, the volume increases by 22%, and the successful transportation rate reaches 100% (the original plan resulted in 10% material spillage due to size mismatch).

[0038] 3. Safety risk control: The emergency linkage system reduces the accident response time from 30 seconds to 3 seconds.

[0039] Traditional solutions This patent solution Single maintenance time 40-60 minutes 12-18 minutes Overhead crane occupancy rate 100％ 0％ Furnace lining repair qualification rate 85％ 97％

[0040] Example 1 (optimum implementation parameters):

[0041] Bucket length 1.1m;

[0042] The converter tilting angle is controlled within the range of 12°-18°;

[0043] Loader travel speed ≤ 5km / h;

[0044] Maintenance frequency: 1-3 times per shift (12 hours), with 1-1.5 tons of material added each time;

[0045] The comparison between the embodiment and the comparative example is shown in the table below:

[0046]

[0047]

[0048] Comparison of experimental data:

[0049] Evaluation Dimensions Traditional overhead crane solution Comparative Example 1 Example 1 Single time 52±8min 38±6min 15±3min Temperature loss 120-150℃ 80-100℃ ≤50℃ Refractory consumption 2.8kg / ton of steel 2.1kg / ton of steel 1.6kg / ton of steel Improved furnace life -200 furnaces +200 furnaces +500 furnaces

[0050] Key data support:

[0051] The number of overhead crane scheduling conflicts is reduced by more than 800 times per year, the furnace lining erosion rate is reduced from 1.2mm / furnace to 0.7mm / furnace, and the furnace service life is extended to more than 8,000 furnaces.

[0052] This technical solution has achieved a "de-crane" revolution in converter maintenance operations through the dual breakthroughs of equipment transformation and process innovation, producing breakthrough improvements in efficiency, cost, and safety, and providing a reusable technical paradigm for the intelligent transformation of the steel industry.

[0053] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A method for quickly maintaining a converter lining using a loader during the converter production interval, characterized in that: During the intervals between converter production, the loader and the converter angle are used to coordinate and turn over the materials to maintain the weak parts of the lining; among which: The internal dimensions of the loader bucket are 1-1.2 meters long, 2.1-2.5 meters wide, and 0.9-1.15 meters high; The converter tilting angle is controlled in the range of 12°-18°.

2. The method for quickly maintaining a converter lining using a loader during the converter production interval according to claim 1, characterized in that: The inner dimension of the loader bucket is 1.0 meter high.

3. The method for quickly maintaining a converter lining using a loader during the interval between converter production according to claim 1, characterized in that: The loader's travel speed is ≤5km / h.

4. The method for quickly maintaining a converter lining using a loader during the interval between converter production according to claim 1, characterized in that: Maintenance frequency: 1-3 times per 12-hour cycle, with 1-1.5 tons of material added each time.

5. The method for quickly maintaining a converter lining using a loader during the interval between converter production according to claim 1, characterized in that: The internal dimensions of the loader bucket are 1.1 meters long, 2.3 meters wide and 0.95 meters high.

6. The method for quickly maintaining a converter lining using a loader during the interval between converter production according to claim 1, characterized in that: The inner dimensions of the loader bucket are adapted to large material bags of 1m×1m×1m and ensure stable material loading.

7. The method for quickly maintaining a converter lining using a loader during the interval between converter production according to claim 1, characterized in that: It also includes an emergency stop button of a safety linkage mechanism, which synchronously controls the tilting of the loader and the converter.

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