A method for the efficient operation of a hot metal ladle and scrap addition in a converter area

Abstract

The present invention is a method for the efficient operation of hot metal ladles and scrap addition in the converter area. The empty ladle line and the full ladle line are used for transportation operations. The empty ladle line is used to park empty hot metal ladle cars, and the full ladle line is used to park full hot metal ladle cars. There are switch A and switch B between the empty ladle line and the full ladle line, and each of the empty ladle line and the full ladle line is equipped with an electric tractor; the specific transfer method is as follows: When the train transports the full hot metal ladle car, directly transport the full hot metal ladle to the parking area of the full ladle line for uncoupling; when the train passes through switch A, change the line to the empty ladle line, couple the empty hot metal ladle car with added scrap to the train, and directly return to the blast furnace for iron reception; in the converter process, uncouple the ladle and empty the ladle in sequence; the electric tractor on the full ladle line couples the hot metal ladle car that has become an empty ladle, transports it through switch B to the empty ladle line for uncoupling, and then returns to the full ladle line; the electric tractor on the empty ladle line couples the empty hot metal ladle car sent from the full ladle line and transports it to the scrap addition area; the present invention greatly improves the turnover rate of hot metal ladles.

Description

Technical Field

[0001] The present invention relates to the field of molten iron ladle car transportation in steelmaking enterprises, and specifically to a method for efficient operation of molten iron ladles and addition of scrap steel in the converter area. Background Art

[0002] Currently, in domestic steel enterprises, molten iron from blast furnaces is basically transported by trains. The transfer of molten iron ladles is a common operation in steel plants. Transferring molten iron ladles not only wastes time but also affects the temperature drop loss of molten iron. Especially in the steelmaking plant area, there are generally only two railway lines for molten iron transportation. Refer to Figure 2 , the full and empty molten iron ladles are mixed and placed on the railway tracks in the plant area. Often, a locomotive is needed to transfer them to pull out the empty ladles and send in the full ladles, which seriously affects the turnover efficiency of the molten iron ladles and causes temperature loss of the molten iron. When there is less molten iron, it will also affect steelmaking production. The specific process of transferring molten iron ladles in the steelmaking plant is as follows:

[0003] When the train transports the full ladle of molten iron from the blast furnace in the ironmaking plant to the steelmaking plant and needs to park on Line B, the train needs to carry the full ladle and move to Line B, and first connect the empty molten iron ladle on the outside with the full ladle.

[0004] The train carries the full ladle and the empty ladle and changes lines through the turnout and moves to Line A.

[0005] The train carries the full ladle and the empty ladle and moves to the molten iron ladle parking area on Line A, and unhooks the empty ladle.

[0006] The train then carries the full ladle and changes lines through the turnout and moves to Line B, and then sends the full ladle of molten iron to the molten iron ladle parking area on Line B and unhooks the full ladle from the train.

[0007] The train then changes lines through the turnout and moves to Line A, connects the empty ladle to the train, moves to the scrap steel addition platform for alignment. After adding scrap steel to the molten iron ladle, it returns to the blast furnace for alignment.

[0008] If the full and empty ladles are alternately placed, the train needs to change lines and reverse hook multiple times to send the full ladle of molten iron into the steelmaking plant and send the empty ladle out to the ironmaking plant. Such an operation is very cumbersome and has low efficiency, seriously affecting the production efficiency at the iron-steel interface. Summary of the Invention

[0009] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and provide a method for efficient operation of molten iron ladles and addition of scrap steel in the converter area.

[0010] The specific solution of the present invention is as follows: A method for the efficient operation of molten iron ladles and scrap steel addition in the converter area. Two railway track lines are used for transportation. One railway track line is the empty ladle line, and the other railway track line is the full ladle line. The empty ladle line is used to park empty molten iron ladle cars, and the full ladle line is used to park full molten iron ladle cars. There is a switch A in the scrap steel addition area between the empty ladle line and the full ladle line, and a switch B in the converter area between the empty ladle line and the full ladle line. There is an electric tractor at each of the empty ladle line and the full ladle line in the converter area. The specific transfer method is as follows:

[0011] When the train transports the full molten iron ladle car from the blast furnace to the converter area, directly transport the full molten iron ladle to the parking area of the full ladle line, and uncouple the full molten iron ladle car from the train.

[0012] When the train passes through switch A, it changes lines to the empty ladle line, couples the empty molten iron ladle car with added scrap steel to the train, and directly returns to the blast furnace for alignment to receive iron.

[0013] In the converter process, the ladle is removed and the empty ladle is processed in sequence.

[0014] The electric tractor on the full ladle line couples the molten iron ladle car that has become empty, transports it through switch B to the empty ladle line, then uncouples, and returns to the full ladle line.

[0015] The electric tractor on the empty ladle line couples the empty molten iron ladle car sent from the full ladle line, transports it to the scrap steel addition area, completes the alignment, and then adds scrap steel to the empty molten iron ladle.

[0016] Furthermore, when there is an abnormal situation where empty molten iron ladle cars and full molten iron ladle cars are alternately placed on the full ladle line, use the electric tractor on the full ladle line to transport the empty molten iron ladle car close to the converter area through switch B to the empty ladle line, and the train transports the empty molten iron ladle car close to the blast furnace side on the full ladle line through switch A to the empty ladle line, then aligns at the scrap steel platform, and directly returns to the blast furnace after adding scrap steel.

[0017] Furthermore, for the empty molten iron ladle cars sandwiched in the middle, the electric tractor on the full ladle line couples the full molten iron ladle car and the empty molten iron ladle car close to the converter area and transports them through switch B to the empty ladle line together, then uncouples the empty molten iron ladle car, and then transports the full molten iron ladle car back to the full ladle line through switch B.

[0018] Furthermore, for the empty molten iron ladle cars sandwiched in the middle, the train couples the full molten iron ladle car and the empty molten iron ladle car together on the side close to the blast furnace, passes through switch A to change lines to the empty ladle line, uncouples the empty molten iron ladle car to the empty ladle line, then transports the full molten iron ladle car back to the full ladle line through switch A, the empty molten iron ladle car is coupled by the electric tractor on the empty ladle line and aligned for scrap steel addition in the scrap steel area, then the electric tractor is uncoupled from the empty molten iron ladle car, and the train is coupled with the empty molten iron ladle car and transported to the blast furnace for alignment to receive iron.

[0019] Further, the switch A is a cross switch.

[0020] The present invention has the following beneficial effects: 1. It gives full play to the relatively convenient advantage of the ladle transfer line both in the normal production operation process and the abnormal production operation process. It is an efficient production operation method that can greatly shorten the molten iron transportation time and significantly improve the ladle turnover rate; 2. The molten iron arrival temperature can be increased by 5°C on the existing basis. Calculated according to the current economic benefit of 0.58 yuan per ton of steel for every 1°C increase, for a steel enterprise with an annual steel production of 6 million tons, the annual economic benefit is: 6×5×0.58 = 17.4 million yuan. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the transportation structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the existing molten iron ladle transportation;

[0023] In the figure: 1. Empty ladle line; 2. Switch A; 3. Empty molten iron ladle car; 4. Full molten iron ladle car; 5. Full ladle line; 6. Switch B; 7. Electric tractor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiment 1

[0025] See Figure 1, this embodiment is a method for the efficient operation of molten iron ladles and scrap addition in the converter area, using two railway track lines for transportation. One railway track line is the empty ladle line 1, and the other railway track line is the full ladle line 5. The empty ladle line 1 is used to park the empty molten iron ladle cars 3, and the full ladle line 5 is used to park the full molten iron ladle cars 4. There is a turnout A2 in the scrap addition area between the empty ladle line 1 and the full ladle line 5, and a turnout B6 in the converter area between the empty ladle line 1 and the full ladle line 5. There is an electric tractor 7 at each of the empty ladle line 1 and the full ladle line 5 in the converter area; the specific transfer method is as follows: When the train transports the full molten iron ladle car 4 from the blast furnace to the converter area, directly transport the full molten iron ladle to the parking area of the full ladle line 5 and uncouple the full molten iron ladle car 4 from the train; when the train passes through the turnout A2, change lines to the empty ladle line 1, couple the empty molten iron ladle car 3 with added scrap to the train, and directly return to the blast furnace for alignment to receive molten iron; the converter process sequentially removes the ladle and empties the ladle; the electric tractor 7 on the full ladle line 5 couples the emptied molten iron ladle cars, transports them through the turnout B6 to the empty ladle line 1, then uncouples, and returns to the full ladle line 5; the electric tractor 7 on the empty ladle line 1 couples the empty molten iron ladle car 3 sent from the full ladle line 5, transports it to the scrap addition area, completes the alignment, and then adds scrap to the empty molten iron ladle. The above is the molten iron ladle transportation operation process of this embodiment under normal production operations. Further, the turnout A2 is a cross turnout. Embodiment 2 In this embodiment, in the case of abnormal production, if the converter process does not sequentially remove the ladle and empty the full molten iron ladle car 4 on the full ladle line 5 in the set order, it will cause the phenomenon of alternating placement of empty and full ladles; at this time, use the electric tractor 7 on the full ladle line 5 to transport the empty molten iron ladle car near the converter area through the turnout B6 to change lines to the empty ladle line 1, and the train transports the empty molten iron ladle car near the blast furnace side on the full ladle line 5 through the turnout A2 to change lines to the empty ladle line 1, and then aligns at the scrap platform. After adding scrap, directly return to the blast furnace. Further, for the empty molten iron ladle cars sandwiched in the middle, the electric tractor 7 on the full ladle line 5 couples the full molten iron ladle car and the empty molten iron ladle car near the converter area and transports them together through the turnout B6 to change lines to the empty ladle line 1, then uncouples the empty molten iron ladle car, and then transports the full molten iron ladle car back to the full ladle line 5 through the turnout B6. Optionally, for the empty molten iron ladle 3 sandwiched in the middle, the train can also couple the full molten iron ladle car and the empty molten iron ladle car together near the blast furnace side and pass through the turnout A2 to change lines to the empty ladle line 1, uncouple the empty molten iron ladle car to the empty ladle line 1, then send the full molten iron ladle car back to the full ladle line 5 through the turnout A2, the empty molten iron ladle car is coupled by the electric tractor 7 on the empty ladle line 1 and aligned for scrap addition in the scrap area, then the electric tractor 7 is uncoupled from the empty molten iron ladle car, and the train is coupled with the empty molten iron ladle car and transported to the blast furnace for alignment to receive molten iron. It can be seen from Embodiment 1 and Embodiment 2 that the present invention gives full play to the relatively convenient advantage of changing the line of molten iron ladles in both the normal production operation process and the abnormal production operation process, and is an efficient production operation method.

Claims

1. A method for the efficient operation of a hot metal ladle and scrap addition in a converter area, characterized in that: Two railway track lines are used for transportation. One of the railway track lines is an empty ladle line, and the other is a full ladle line. The empty ladle line is used to park empty molten iron ladle cars, and the full ladle line is used to park full molten iron ladle cars. There is a switch A in the scrap addition area between the empty ladle line and the full ladle line, and a switch B in the converter area between the empty ladle line and the full ladle line. There is an electric tractor at each of the empty ladle line and the full ladle line in the converter area. The specific transfer method is as follows: When the train transports the full molten iron ladle car from the blast furnace to the converter area, directly transport the full molten iron ladle to the parking area of the full ladle line and uncouple the full molten iron ladle car from the train. When the train passes through switch A, change the line to the empty ladle line, couple the empty molten iron ladle car with added scrap to the train, and directly return to the blast furnace for alignment to receive molten iron. The converter process sequentially removes the ladle and empties the ladle in order. The electric tractor on the full ladle line couples the molten iron ladle car that has become empty, transports it through switch B to the empty ladle line, then uncouples, and returns to the full ladle line. The electric tractor on the empty ladle line couples the empty molten iron ladle car sent from the full ladle line, transports it to the scrap addition area, completes the alignment, and then adds scrap to the empty molten iron ladle. When there is an abnormal situation where empty molten iron ladle cars and full molten iron ladle cars are alternately placed on the full ladle line, use the electric tractor on the full ladle line to transport the empty molten iron ladle car near the converter area to the empty ladle line through switch B, and the train transports the empty molten iron ladle car near the blast furnace side on the full ladle line to the empty ladle line through switch A, and then aligns at the scrap platform. After adding scrap, directly return to the blast furnace. For the empty molten iron ladle car sandwiched in the middle, the train couples the full molten iron ladle car and the empty molten iron ladle car near the blast furnace side and passes through switch A to change the line to the empty ladle line, uncouples the empty molten iron ladle car to the empty ladle line, then transports the full molten iron ladle car back to the full ladle line through switch A. The empty molten iron ladle car is coupled by the electric tractor on the empty ladle line and aligned for scrap addition in the scrap area. Then the electric tractor uncouples from the empty molten iron ladle car, and the train couples with the empty molten iron ladle car and transports it to the blast furnace for alignment to receive molten iron.

2. The method for the efficient operation of the hot metal ladle and scrap addition in the converter area according to claim 1, characterized in that: For the empty molten iron ladle car sandwiched in the middle, the electric tractor on the full ladle line couples the full molten iron ladle car and the empty molten iron ladle car near the converter area and transports them through switch B to change the line to the empty ladle line, then uncouples the empty molten iron ladle car, and transports the full molten iron ladle car back to the full ladle line through switch B.

3. A method for the efficient operation of a hot metal ladle and scrap addition in a converter area according to claim 1, characterized in that: The switch A is a cross switch.

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