A safe transfer method of molten iron ladle

Abstract

The application discloses a molten iron ladle safe transfer method and belongs to the technical field of converter processes. The method solves the problem that forced plugging of a blast furnace or iron running occurs due to untimely empty ladle feeding. The method prepares a standby empty ladle behind a ladle pulling locomotive of each blast furnace. The standby empty ladle is still provided with scrap steel, the scrap steel is fed at half of the normal feeding amount, the standby empty ladle is replaced at a set interval, and the standby empty ladle is directly put into use at the time and another hot standby empty ladle is replaced for standby. A hot standby empty ladle is left at the innermost end of a main track line of a steelmaking plant, the hot standby empty ladle is replaced at a set interval, the hot standby empty ladle is taken out and used when the empty ladle is taken out of the steelmaking plant, scrap steel is added at half of the normal amount during the way, and another hot empty ladle is arranged for standby. The molten iron ladle safe transfer method can put the standby empty ladle into use immediately in an emergency, avoids safety accidents, and has the characteristics of convenient use and strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of molten iron transportation, and in particular to a method for safely transporting a molten iron tank. Background Art

[0002] Molten iron is transported between the blast furnace and the steel mill by rail. Each blast furnace casthouse is equipped with rails for molten iron transfer and is equipped with corresponding locomotives for operation.

[0003] To increase steel production and reduce iron consumption, a certain amount of scrap steel is added to the hot metal ladle before it receives iron, based on the tapping temperature. To reduce the temperature drop during hot metal transfer and increase the iron-adding temperature in the steel mill's converter, efforts are underway to accelerate hot metal ladle turnover by adjusting the number of ladle tanks in operation and the number of ladle tanks in operation. Ladle operation is streamlined, with two or three empty ladle tanks per main tapping line and one empty ladle tank per secondary tapping line, minimizing the number of ladle tanks in operation to a reasonable level.

[0004] However, during these operations, the iron-receiving process beneath the blast furnace can experience splashing, tumbling, or blasting due to excessive slag or scrap. For safety reasons, iron-receiving must be stopped and the swing nozzle moved to another receiving line. Abnormal molten iron composition and prolonged steelmaking control lead to delayed iron addition. Furthermore, abnormalities at the steelmaking plant prevent the timely delivery of empty cans after iron addition. These conditions lead to a shortage of empty cans beneath the blast furnace, necessitating the urgent dispatch of locomotives to deliver cans from the iron ladle handling workshop. This process is relatively time-consuming. If the empty cans are not delivered in time, the blast furnace may become blocked or iron may escape, impacting production and site safety. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for safely transferring molten iron tanks in response to the above-mentioned shortcomings of the existing technology. The spare empty tanks can be put into use immediately in an emergency to avoid safety accidents. The method is easy to use and highly practical.

[0006] The technical solution adopted by the present invention is: a method for safely transporting molten iron ladle, by preparing a spare empty ladle behind the ladle-pulling locomotive of each blast furnace, the spare empty ladle is still loaded with scrap steel, and the scrap steel loading amount is half of the normal loading amount, and the spare empty ladle is rotated at a set interval, and is directly put into use after the time is up, and is replaced by another hot spare empty ladle as a standby, by leaving a hot spare empty ladle at the innermost end of the main track line of the steel plant, setting an interval for rotation, and when the time is up, the empty ladle is taken out for use when the steel plant leaves, and is loaded with scrap steel at half of the normal amount on the way, and then another hot empty ladle is arranged as a standby, and the spare empty ladle can be immediately put into use in an emergency to avoid safety accidents.

[0007] As a further improvement, the method comprises the following steps:

[0008] Step 1: After adding molten iron, the steel mill puts the empty tanks into the tanks. The innermost empty tank is covered with an insulation cover as a spare empty tank.

[0009] Step 2: The tank pulling locomotive pulls out other empty tanks to the scrap steel loading point to load scrap steel. The hot metal tanks close to the tank pulling locomotive are arranged as spare empty tanks, and the spare empty tanks are also loaded with scrap steel;

[0010] Step 3: After adding scrap steel, the spare empty tank near the tank pulling locomotive is covered with insulation cover, and other hot metal tanks are arranged to receive iron under the blast furnace as required;

[0011] Step 4: When an emergency occurs while receiving iron under the blast furnace, immediately activate the spare empty tank, open the insulation cover and prepare to receive iron;

[0012] Step 5: When other abnormalities occur and it is predicted that there are not enough empty tanks, the spare empty tanks at the innermost end of the main track line of the steel plant can be immediately activated. The tank-pulling locomotive pulls it out to the scrap steel loading point to add scrap steel, and then puts it into the blast furnace to receive iron.

[0013] Furthermore, the rotation interval of the spare empty tanks is 4 to 6 hours.

[0014] Furthermore, a spare track line is provided between the steelmaking plant and the blast furnace, and a connecting track is provided between the spare track line and the main track line.

[0015] Furthermore, in the step 2, the scrap steel loading point is arranged in the middle position between the steelworks and the blast furnace.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The invention provides a safe transportation method for molten iron tanks. A spare empty tank is prepared behind the tank pulling locomotive of each blast furnace. Scrap steel is still added to the spare empty tank, and the scrap steel loading amount is half of the normal loading amount. The spare empty tank is rotated at a set interval and is directly put into use after the time is up, and another hot spare empty tank is replaced as a standby. A hot spare empty tank is left at the innermost end of the main track line of the steel plant, and the rotation is set at an interval. When the steel plant leaves the empty tanks after the time is up, they are taken out for use together, and half of the scrap steel is added on the way, and another hot empty tank is arranged as a standby. The spare empty tank can be put into use immediately in an emergency to avoid safety accidents. Moreover, a small amount of scrap steel is added to the spare tanks, which will not affect indicators such as iron consumption / steel material consumption. Controlling the use time of the spare empty tanks can effectively reduce the large temperature drop of molten iron after the spare empty tanks are irradiated, thereby ensuring product quality. The invention has the characteristics of strong practicality and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the process structure of the present invention.

[0020] Among them: 1-blast furnace, 2-steel mill, 3-molten iron tank processing workshop, 4-tank pulling locomotive, 5-spare empty tank, 6-spare track line, 7-scrap steel loading point, 8-main track line, 9-connecting track. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See Figure 1 As shown, a method for safely transporting molten iron tanks of the present invention is to prepare a spare empty tank 5 behind the tank-pulling locomotive 4 of each blast furnace 1, and the spare empty tank 5 is still loaded with scrap steel, and the scrap steel loading amount is half of the normal loading amount, and the spare empty tank 5 is rotated by setting an interval time, and is directly put into use after the time is up, and another hot spare empty tank 5 is replaced as a standby, and a hot spare empty tank 5 is left at the innermost end of the main track line 8 of the steel plant 2, and an interval time is set to rotate, and when the time is up, the steel plant 2 takes out the empty tanks together for use, and adds half of the normal scrap steel on the way, and then arranges another hot empty tank as a standby, and the spare empty tank 5 can be put into use immediately in an emergency to avoid safety accidents; and the spare empty tanks 5 are all filled with a small amount of scrap steel, which will not affect indicators such as iron consumption / steel material consumption; controlling the use time of the spare empty tanks 5 can effectively reduce the large temperature drop of the molten iron after the spare empty tanks 5 are ironed, thereby ensuring the quality of the product.

[0023] Specifically, the method includes the following steps:

[0024] Step 1: After adding molten iron in steel mill 2, empty the tanks and cover the innermost tank with an insulation cover as a spare tank 5;

[0025] Step 2: The tank pulling locomotive 4 pulls out other empty tanks to the scrap steel loading point 7 to load scrap steel. The molten iron tanks near the tank pulling locomotive 4 are arranged as spare empty tanks 5, and the spare empty tanks 5 are also loaded with scrap steel;

[0026] Step 3: After adding scrap steel, the spare empty tank 5 near the tank pulling locomotive 4 is covered with the insulation cover, and other molten iron tanks are arranged to receive iron under the blast furnace 1 according to requirements;

[0027] Step 4: When an emergency occurs while receiving iron under the blast furnace, immediately activate the spare empty tank 5, open the insulation cover and prepare to receive iron;

[0028] Step 5: When other abnormalities occur and it is predicted that there are not enough empty tanks, the spare empty tank 5 at the innermost end of the main track line of the steel plant can be immediately activated, and the tank pulling locomotive 4 pulls it out to the scrap steel loading point 7 to load scrap steel, and then puts it into the blast furnace 1 to receive iron.

[0029] Preferably, the rotation interval of the spare empty tank 5 is 4 to 6 hours.

[0030] Furthermore, a spare track line 6 is provided between the steel plant 2 and the blast furnace 1, and a connecting track 9 is provided between the spare track line 6 and the main track line. The spare track line 6 is added to prevent the main track line 8 from malfunctioning, causing production to stop and affecting production progress.

[0031] Furthermore, in step 2, the scrap steel loading point 7 is arranged in the middle position between the steelmaking plant 2 and the blast furnace 1 to facilitate loading of scrap steel into the spare empty tank 5 .

[0032] The invention relates to a method for safely transporting molten iron ladle. During use, a spare empty ladle 5 is prepared behind the ladle locomotive 4 of each blast furnace 1. The spare empty ladle 5 is still loaded with scrap steel. The scrap steel loading amount is half of the normal loading amount. The spare empty ladle 5 is rotated by setting an interval time. The spare empty ladle 5 is rotated once every 4-6 hours. When the time is up, it is directly put into use and replaced with another hot spare empty ladle 5 as a backup to ensure that the spare empty ladle is not completely cooled. A hot spare empty ladle 5 is left at the innermost end of the main track line 8 of the steel plant 2. The interval time is set. The spare empty tank 5 is rotated at intervals, and the rotation time is also rotated every 4-6 hours. When the time is up, the steel plant 2 takes out the empty tank together for use. Scrap steel is added on the way at half the normal rate, and another hot empty tank is arranged as a backup. The spare empty tank 5 can be put into use immediately in an emergency to avoid safety accidents. In addition, a small amount of scrap steel is added to the spare empty tank 5, which will not affect the iron consumption / steel material consumption and other indicators. Controlling the use time of the spare empty tank 5 can effectively reduce the large temperature drop of the molten iron after the spare empty tank 5 is ironed, thereby ensuring the quality of the product. It has the characteristics of strong practicality and wide application range.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for safe transfer of molten iron ladle, characterized in that: A spare empty tank (5) is prepared behind the tank pulling locomotive (4) of each blast furnace (1), and the spare empty tank (5) is still loaded with scrap steel, and the scrap steel loading amount is half of the normal loading amount. The spare empty tank (5) is rotated at a set interval, and is directly put into use after the time is up, and another hot spare empty tank (5) is replaced as a standby. A hot spare empty tank (5) is left at the innermost end of the main track line (8) of the steel mill (2), and is rotated at a set interval. When the time is up, the steel mill (2) takes the empty tank out for use, and the scrap steel is loaded on the way at half of the normal amount, and another hot empty tank is arranged as a standby. The spare empty tank can be immediately put into use in an emergency, thereby avoiding safety accidents. The method includes the following steps: Step 1: After adding molten iron, the steel mill (2) puts the empty tank into the empty tank, and covers the innermost empty tank with an insulation cover as a spare empty tank (5); Step 2: The tank pulling locomotive (4) pulls out other empty tanks to the scrap steel loading point (7) to load scrap steel, and the molten iron tank close to the tank pulling locomotive (4) is arranged as a spare empty tank (5), and the spare empty tank (5) is also loaded with scrap steel; Step 3: After adding scrap steel, the spare empty tank (5) near the tank pulling locomotive (4) is covered with an insulation cover, and other molten iron tanks are arranged under the blast furnace (1) to receive iron according to requirements; Step 4: When an emergency occurs while receiving iron under the blast furnace, immediately activate the spare empty tank (5), open the insulation cover and prepare to receive iron; Step 5: When other abnormalities occur and it is predicted that there are not enough empty tanks, the spare empty tank (5) at the innermost end of the main track line of the steel plant can be immediately activated, and the tank pulling locomotive (4) pulls it out to the scrap steel loading point (7) to load scrap steel, and then puts it into the blast furnace (1) to receive iron.

2. A method for safe transfer of molten iron ladle according to claim 1, characterized in that: The rotation interval of the spare empty tank (5) is 4 to 6 hours.

3. The method for safe transfer of molten iron ladle according to claim 1, characterized in that: A spare track line (6) is provided between the steelmaking plant (2) and the blast furnace (1), and a connecting track (9) is provided between the spare track line (6) and the main track line.

4. The method for safe transfer of molten iron ladle according to claim 1, characterized in that: In the second step, the scrap steel loading point (7) is arranged at an intermediate position between the steelmaking plant (2) and the blast furnace (1).

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