Molten iron temperature accurate control device

Abstract

The utility model relates to the technical field of temperature monitoring, in particular to an accurate molten iron temperature control device. According to the technical scheme, the furnace comprises a furnace body, an air inlet head, an air outlet head, an air inlet pipe, a suction pipe and a main pipe, the air inlet pipe is arranged on one side of the furnace body, the main pipe is arranged on the other side of the furnace body, three branch pipes are connected to the main pipe in parallel, the three branch pipes are communicated with the main pipe, and the suction pipe is arranged on the main pipe. And an air volume sensor, an oxygen sensor and a temperature and humidity sensor are mounted in the three branch pipes correspondingly. Through the cooperation of the structures and the detection of the temperature in the furnace, the temperature in the furnace can be stabilized, the product quality is improved, and the comprehensive cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring, in particular to a device for accurately controlling the temperature of molten iron. Background Art

[0002] The blast furnace temperature is the guarantee of the stable and smooth operation of the blast furnace, and it is also the main factor restricting the smelting cost of the blast furnace. Reasonable blast furnace molten iron temperature is an important indicator for judging the smooth operation of the blast furnace. Molten iron is one of the important intermediate products in the steel production process, and its temperature has a vital impact on the quality and efficiency of subsequent processes.

[0003] At present, the silicon content of blast furnace hot metal is mainly used to predict the furnace temperature. However, the blast furnace temperature and the silicon content of blast furnace hot metal are positively correlated rather than strictly linearly related, so the use of the silicon content of blast furnace hot metal as a single indicator to predict the blast furnace temperature has certain defects.

[0004] To this end, we propose a molten iron temperature precision control device to solve the existing problems. Utility Model Content

[0005] The purpose of the utility model is to provide a device for accurately controlling the temperature of molten iron in view of the problems existing in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for precise control of molten iron temperature, comprising a furnace body, an air inlet head, an air outlet head, an air inlet pipe, a suction pipe and a main pipe, an air inlet pipe is provided on one side of the furnace body, and a main pipe is provided on the other side of the furnace body, three branch pipes are connected in parallel to the main pipe, the three branch pipes are interconnected with the main pipe, and air volume sensors, oxygen sensors and temperature and humidity sensors are respectively installed inside the three branch pipes.

[0007] Preferably, an air inlet head is embedded and installed on one side of the furnace body, and an air inlet pipe is installed on the air inlet head through a flange.

[0008] Preferably, an air outlet is embedded and installed on the other side of the furnace body, and a main pipe is installed on the air outlet via a flange.

[0009] Preferably, a sealing head is installed at the end of the main pipe, and a mounting hole matching the suction pipe is opened on the sealing head;

[0010] One end of the suction pipe is embedded in the mounting hole, and the suction pipe is connected to the main pipe.

[0011] Preferably, the air inlet head, the air outlet head and the suction pipe are all equipped with flow valves by bolts;

[0012] An on-off valve is installed at the opening of one end of the branch pipe away from the main pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] During use, the utility model of the molten iron temperature precision control device can be connected to the external air supply structure through the air inlet pipe, and the air source stably enters the furnace body under the action of the pump, and then enters the main pipe;

[0015] At this time, the wind carries the molten iron production environment inside the furnace body into the three branch pipes respectively. The air volume sensors, oxygen sensors, and temperature and humidity sensors in the three branch pipes detect the factors of the molten iron production environment inside the furnace body. According to the parameters such as air flow rate, oxygen-enriched flow rate, air temperature, and air humidity, an external computer terminal is connected. The computer terminal combines the correction coefficient to establish three groups of function curves for normal furnace temperature, furnace temperature heating, and furnace temperature cooling. If it is lower than the theoretical curve value of the furnace condition, the raw fuel is replenished in time and quantitatively to stabilize the furnace temperature.

[0016] The utility model can stabilize the temperature in the furnace, improve product quality and reduce comprehensive costs by detecting the temperature in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 For the utility model Figure 1 A schematic cross-sectional structure diagram of ;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.

[0020] Reference numerals:

[0021] 1. Furnace body; 2. Flow valve; 3. Air inlet; 4. Air inlet pipe; 5. Air outlet; 6. Switch valve; 7. Air volume sensor; 8. Oxygen sensor; 9. Main pipe; 10. Temperature and humidity sensor; 11. Suction pipe; 12. Branch pipe; 13. End cap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] like Figure 1-Figure 3As shown, the utility model proposes a device for accurately controlling the temperature of molten iron, comprising a furnace body 1, an air inlet head 3, an air outlet head 5, an air inlet pipe 4, a suction pipe 11 and a main pipe 9. An air inlet pipe 4 is provided on one side of the furnace body 1, and a main pipe 9 is provided on the other side of the furnace body 1. Three branch pipes 12 are connected in parallel to the main pipe 9, and the three branch pipes 12 are interconnected with the main pipe 9. An air volume sensor 7, an oxygen sensor 8 and a temperature and humidity sensor 10 are respectively installed inside the three branch pipes 12.

[0025] Based on Example 1:

[0026] During use, the utility model of the molten iron temperature precision control device can be connected to the external air supply structure through the air inlet pipe 4, and the air source stably enters the furnace body 1 under the action of the pump, and then enters the main pipe 9;

[0027] At this time, the wind carries the molten iron production environment inside the furnace body 1 into the three branch pipes 12 respectively. The air volume sensor 7, oxygen sensor 8, and temperature and humidity sensor 10 in the three branch pipes 12 detect the factors of the molten iron production environment inside the furnace body 1, and then connect to the external computer terminal. According to the parameters such as air flow rate, oxygen-enriched flow rate, air temperature, and air humidity, the computer terminal combines the correction coefficient to establish three groups of function curves for normal furnace temperature, hot furnace temperature, and cool furnace temperature. If it is lower than the theoretical curve value of the furnace condition, the raw fuel is replenished in time and quantitatively to stabilize the furnace temperature.

[0028] Embodiment 2

[0029] like Figure 1-Figure 3 As shown, the utility model proposes a device for accurately controlling the temperature of molten iron. Compared with the first embodiment, the present embodiment further includes: an air inlet head 3 is embedded and installed on one side of the furnace body 1, an air inlet pipe 4 is installed on the air inlet head 3 through a flange, an air outlet head 5 is embedded and installed on the other side of the furnace body 1, a main pipe 9 is installed on the air outlet head 5 through a flange, a head cover 13 is installed at the end position of the main pipe 9, a mounting hole matched with the suction pipe 11 is opened on the head cover 13, one end of the suction pipe 11 is embedded and installed in the mounting hole, the suction pipe 11 and the main pipe 9 are connected to each other, through the cooperation of the above structure, in the actual operation process, before the air is supplied, the air outlet head 5 and each branch pipe 12 can be closed, and then the external pump suction structure is connected through the suction pipe 11, so that the outside air in the main pipe 9 and the branch pipe 12 is extracted, and then the suction pipe 11 is closed and then the air outlet head 5 and each branch pipe 12 are opened, thereby improving the accuracy of the detection structure.

[0030] A flow valve 2 is installed in the air inlet 3, the air outlet 5 and the suction pipe 11 by bolts, and a switch valve 6 is installed at the opening of the branch pipe 12 away from the main pipe 9. The design of the flow valve 2 and the switch valve 6 can control the on-off state of the above-mentioned pipelines.

[0031] The iron temperature can correctly reflect the furnace temperature. Large blast furnaces should maintain a stable molten iron temperature, which should not be too high or too low. If the molten iron temperature is too low, the fluidity of the slag and iron will deteriorate, and the discharge capacity of the furnace will deteriorate. If the molten iron temperature is too high, the fuel ratio will inevitably increase. Measure the molten iron temperature in a timely manner, and it should not be measured too early. The furnace temperature will change with the iron-discharging time. Generally, the molten iron temperature is measured ten minutes after slag-discharging. Record the test data of raw materials and fuels in time to ensure the stability of the blast furnace charge structure. Adjust the furnace ratio in time according to the quality inspection results of iron ore, and adjust the load in time according to the changes in the moisture content of coke. The stability of the furnace temperature and the smooth operation of the blast furnace are largely determined by raw materials and fuels. According to the changes in the quality of raw materials and fuels, reasonable adjustments and predictions should be made in advance to prevent excessive fuel consumption.

[0032] It should be noted that the structures of the flow valve 2 and the switch valve 6 are existing mature technologies, and their working principles and internal structures are known to technicians in the relevant technical field. The utility model only utilizes their functions and does not improve their internal structures. Therefore, they are not described in detail here, and technicians in this field can make any optional adjustments according to their needs or convenience.

[0033] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for accurately controlling the temperature of molten iron, comprising a furnace body (1), an air inlet head (3), an air outlet head (5), an air inlet pipe (4), a suction pipe (11) and a main pipe (9), characterized in that: An air inlet pipe (4) is provided on one side of the furnace body (1), and a main pipe (9) is provided on the other side of the furnace body (1). Three branch pipes (12) are connected in parallel to the main pipe (9). The three branch pipes (12) are interconnected with the main pipe (9), and air volume sensors (7), oxygen sensors (8) and temperature and humidity sensors (10) are respectively installed inside the three branch pipes (12).

2. The device for accurately controlling the temperature of molten iron according to claim 1, characterized in that: An air inlet head (3) is embedded and installed on one side of the furnace body (1), and an air inlet pipe (4) is installed on the air inlet head (3) via a flange.

3. The device for accurately controlling the temperature of molten iron according to claim 1, characterized in that: An air outlet (5) is embedded and installed on the other side of the furnace body (1), and a main pipe (9) is installed on the air outlet (5) via a flange.

4. The device for accurately controlling the temperature of molten iron according to claim 1, characterized in that: A sealing head (13) is installed at the end of the main pipe (9), and a mounting hole matching the suction pipe (11) is provided on the sealing head (13); One end of the suction pipe (11) is embedded in the mounting hole, and the suction pipe (11) and the main pipe (9) are interconnected.

5. The device for accurately controlling the temperature of molten iron according to claim 1, characterized in that: The air inlet head (3), the air outlet head (5) and the suction pipe (11) are all equipped with flow valves (2) by means of bolts; An on-off valve (6) is installed at the opening of one end of the branch pipe (12) away from the main pipe (9).

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