A device for preventing explosion of blast furnace slag

Abstract

The present application relates to the technical field of blast furnace safety protection, and specifically discloses a device for preventing blast furnace slag explosion, which comprises a slag-iron separation mechanism, a shunt mechanism and a slag remover, wherein the slag-iron separation mechanism comprises a main slag channel, a main iron channel, a molten iron channel and the slag remover, and is used for separating molten iron and slag; the shunt mechanism is arranged on one side of the main slag channel and comprises a weighing slag channel, which is in communication with the main slag channel and has a depth lower than that of the main slag channel, and is used for shunting the iron slag mixture in the main slag channel; and the weighing slag channel and the side wall of the main slag channel have a 5mm floating gap. The present application realizes continuous online monitoring of the weight of blast furnace slag, discovers serious iron content in slag in time, takes necessary measures in the first time, prevents explosion accidents in the water slag channel, adopts a double-sensor design, and only gives an audible and visual alarm when both sensors show that the weight of slag exceeds the upper limit, thereby preventing false alarms.

Description

Technical Field

[0001] This invention belongs to the field of blast furnace safety protection technology, specifically relating to a device for preventing blast furnace slag explosions. Background Technology

[0002] Poor quality or improper proportioning of the furnace charge, as well as improper operation, can all cause problems in blast furnaces. During tapping, poor slag-iron separation in the skimmer can lead to some molten iron mixing with the slag and flowing into the slag channel to flush it with water. Since the density of molten iron is 7.14 t / m³... 3 The density of the slag is only 1.2-1.5 t / m³. 3 Therefore, the molten iron mixed with the slag flows at the bottom, while the slag floats at the top, making it difficult for furnace workers to detect.

[0003] Under normal circumstances, the iron content in slag is 1.5%. When the furnace conditions are not smooth, the slag-iron separation is poor, and too much molten iron is mixed into the slag. The flushing water, under the action of the molten iron at 1450℃ in the lower part of the slag flow, instantly vaporizes into high-temperature steam, increasing in volume and pressure. Because the slag has a low density, it floats on top of the molten iron, so a large amount of high-temperature, high-pressure steam cannot be discharged quickly, resulting in an explosion in the slag ditch. This seriously affects the normal operation of production, as well as the safety of personnel and equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a device for preventing blast furnace slag explosions, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for preventing blast furnace slag explosions, comprising:

[0007] The slag-iron separation mechanism includes a main slag ditch, a main iron ditch, an iron molten iron ditch, and a slag remover, used to separate molten iron and slag.

[0008] A diversion mechanism is provided on one side of the main slag trough. The diversion mechanism includes a weighing slag trough, which is connected to the main slag trough and has a lower depth than the main slag trough. The weighing slag trough is used to divert the iron slag mixture inside the main slag trough. There is a 5mm floating gap between the weighing slag trough and the side wall of the main slag trough.

[0009] A weighing mechanism is installed below the openings on both sides of the weighing slag trough. The weighing mechanism includes two weighing sensors for weighing the weight at the openings on both sides of the weighing slag trough.

[0010] The slag collection mechanism is located below the weighing slag ditch.

[0011] Preferably, the main slag trough, main iron trough, and molten iron trough are arranged in a T-shape, and the slag remover connects the main slag trough, main iron trough, and molten iron trough.

[0012] Preferably, the slag collection mechanism includes a slag collection trough, which is fixedly connected to the main slag ditch, and a support crossbar is provided on the top of the slag collection trough.

[0013] Preferably, the supporting crossbar is fixedly connected to the bottom of the weighing slag ditch through a load-bearing fulcrum, and the load-bearing fulcrum has a floating space of 5mm.

[0014] Preferably, the bottom of the weighing sensor is fixedly connected to the top of the supporting crossbar, and the top of the weighing sensor is fixedly connected to the bottom of the weighing slag ditch.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) To realize continuous online monitoring of blast furnace slag weight, timely detection of serious iron carryover in slag, and take necessary measures to prevent explosion accidents in water slag ditch;

[0017] (2) A dual-sensor design is adopted, and an audible and visual alarm is only issued when both sensors show that the slag weight exceeds the upper limit, thus preventing false alarms;

[0018] (3) It avoids the occurrence of water slag ditch explosion accidents, increases production and efficiency, and eliminates safety hazards. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is the electrical schematic diagram of the present invention;

[0021] In the diagram: 1. Main slag trough; 2. Main iron trough; 3. Iron molten trough; 4. Slag remover; 5. Weighing slag trough; 6. Weighing sensor; 7. Slag accumulation trough; 8. Support crossbar; 9. Load-bearing support point. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example:

[0024] Please see Figures 1-2 As shown, a device for preventing blast furnace slag explosions includes:

[0025] The slag-iron separation mechanism includes a main slag trough 1, a main iron trough 2, an iron molten metal trough 3, and a slag remover 4, which are used to separate molten iron and slag.

[0026] The diversion mechanism is set on one side of the main slag trough 1. The diversion mechanism includes a weighing slag trough 5, which is connected to the main slag trough 1. Its depth is lower than that of the main slag trough 1. The weighing slag trough 5 is used to divert the iron slag mixture inside the main slag trough 1. There is a 5mm floating gap between the weighing slag trough 5 and the side wall of the main slag trough 1.

[0027] A weighing mechanism is installed below the openings on both sides of the weighing slag trough 5. The weighing mechanism includes two weighing sensors 6, which are used to weigh the weight at the openings on both sides of the weighing slag trough 5.

[0028] The slag collection mechanism is located below the weighing slag ditch 5.

[0029] Depend on Figure 1 It can be seen that the main slag trough 1, the main iron trough 2, and the molten iron trough 3 are distributed in a T-shape. The slag remover 4 connects the main slag trough 1, the main iron trough 2, and the molten iron trough 3. The slag collection mechanism includes a slag collection trough 7, which is fixedly connected to the main slag trough 1. A support crossbar 8 is provided on the top of the slag collection trough 7. The support crossbar 8 is fixedly connected to the bottom of the weighing slag trough 5 through a load-bearing fulcrum 9. The load-bearing fulcrum 9 has a floating space of 5mm. The bottom of the weighing sensor 6 is fixedly connected to the top of the support crossbar 8, and the top of the weighing sensor 6 is fixedly connected to the bottom of the weighing slag trough 5.

[0030] As can be seen from the above, during the operation, the iron slag mixture flows from the main iron trough 2 to the interior of the slag remover 4, which separates the iron slag mixture into molten iron and slag. The molten iron is discharged from the molten iron trough 3, and the slag is discharged from the main slag trough 1. After separation, some molten iron and slag often enter the main slag trough 1 at the same time. During the flow of the iron slag mixture, it is diverted by the weighing slag trough 5, so that some slag and some molten iron on the surface enter the weighing slag trough 5. Two weighing sensors 6 will continuously weigh the slag flowing through the weighing slag trough 5 online and transmit the signal to the digital display in the blast furnace main control room.

[0031] Changes in slag weight reflect changes in the amount of iron carried in the slag. The density of a normal slag-iron mixture is 1.6-1.8 t / m³. 3 If the readings from both load cells exceed 1.8 t / m 3 If the external tower light flashes red and a buzzer sounds, an alarm is triggered, allowing blast furnace operators to take timely and necessary measures to prevent an explosion in the molten iron slag ditch and avoid a major accident.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing blast furnace slag explosions, characterized in that, include: The slag-iron separation mechanism includes a main slag ditch (1), a main iron ditch (2), an iron ditch (3), and a slag remover (4) for separating molten iron and slag. A diversion mechanism is provided on one side of the main slag trough (1). The diversion mechanism includes a weighing slag trough (5), which is connected to the main slag trough (1) and has a depth lower than the main slag trough (1). The weighing slag trough (5) is used to divert the iron slag mixture inside the main slag trough (1). The weighing slag trough (5) and the side wall of the main slag trough (1) have a 5mm floating gap. A weighing mechanism is set below the openings on both sides of the weighing slag ditch (5). The weighing mechanism includes two weighing sensors (6) for weighing the weight at the openings on both sides of the weighing slag ditch (5). The slag collection mechanism is located below the weighing slag ditch (5); The main slag ditch (1), main iron ditch (2) and molten iron ditch (3) are arranged in a T-shape, and the slag remover (4) connects the main slag ditch (1), main iron ditch (2) and molten iron ditch (3); The slag collection mechanism includes a slag collection trough (7), which is fixedly connected to the main slag ditch (1), and a support crossbar (8) is provided on the top of the slag collection trough (7). The supporting crossbar (8) is fixedly connected to the bottom of the weighing slag ditch (5) through the load-bearing fulcrum (9), and the load-bearing fulcrum (9) has a floating space of 5mm; The bottom of the weighing sensor (6) is fixedly connected to the top of the supporting crossbar (8), and the top of the weighing sensor (6) is fixedly connected to the bottom of the weighing slag ditch (5).

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