A real-time monitoring device in a molten pool smelting furnace during bottom blowing and stirring

Abstract

The present invention discloses a real-time monitoring device in a molten pool smelting furnace during bottom blowing and stirring, comprising: a monitoring module for collecting uniformity indicators using a monitoring robot; a processing module connected to the monitoring module for analyzing and judging the uniformity indicators to obtain data signals; and a blowing module connected to the processing module for adjusting the air flow rate of the spray gun and the oxygen-enriched blowing amount based on the data signals. The present invention improves the uniformity of solution distribution in an oxygen-enriched bottom blowing molten pool smelting furnace and can realize real-time monitoring of the temperature and density of each area of ​​the furnace.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical engineering, and in particular relates to a real-time monitoring device in a molten pool smelting furnace during a bottom blowing and stirring process. Background Art

[0002] At present, the metallurgical industry, as a typical high-energy consumption and high-emission industry, has received special attention. The binding indicators for energy conservation and emission reduction in the metallurgical industry have been clarified, and efforts to eliminate backward production capacity have been intensified. Therefore, new smelting energy-saving technologies will be accompanied by technological transformation and elimination of backward processes and equipment, becoming the key to energy conservation and emission reduction in the metallurgical industry.

[0003] Oxygen-enriched molten pool smelting technology is to blow gas directly into the molten pool to achieve rapid heat and mass transfer between the three phases. The key is to promote the rapid and sufficient slag-making reaction. In recent years, oxygen-enriched molten pool smelting technology has shown a good development momentum, and the development of oxygen-enriched bottom blowing smelting technology is slightly behind, and its share of production capacity is the smallest, which is determined by its process characteristics. Simple bottom blowing and stirring cannot know the molten pool temperature and melt distribution, which affects product quality and solution unevenness, severe splashing, short life, insufficient utilization, and high energy consumption. In summary, the existing molten pool smelting measurement methods are difficult to measure the movement state of bubbles in the entire melt process, and how to accurately non-invasively and real-time monitor the movement state of bubbles is a problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the problems of uncoordinated flow field and temperature field in the furnace, inaccurate heating and harsh high temperature environment during enhanced heating, the present invention provides a real-time monitoring device in the molten pool smelting furnace during bottom blowing and stirring. When the bubble group stirs the molten pool solution, the monitoring robot in the molten pool is driven to form a spiral motion. During the full stirring process, the robot monitors the molten pool temperature and density in real time to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides a real-time monitoring device in a molten pool smelting furnace during a bottom blowing and stirring process, comprising:

[0006] A monitoring module, used to collect uniformity indicators using a monitoring robot; the uniformity indicators include molten pool temperature and molten pool density;

[0007] A processing module, connected to the monitoring module, for analyzing and judging the uniformity index to obtain a data signal;

[0008] The blowing module is connected to the processing module and is used to adjust the air flow rate and oxygen-enriched blowing amount of the spray gun based on the data signal.

[0009] Preferably, the monitoring module is placed in a molten pool smelting furnace, and the molten pool smelting furnace includes a supporting jack and a furnace body arranged on the supporting jack; a first feed port and a smoke exhaust port are arranged on the top of the furnace body;

[0010] The first side wall of the furnace body is provided with a second feed inlet, a furnace body water jacket, and a slag outlet;

[0011] The second side wall of the furnace body is provided with a copper outlet;

[0012] The bottom of the furnace body comprises furnace bottom refractory bricks and a bottom blowing kit.

[0013] Preferably, the furnace water jacket is used to protect the inner shell of the smelting furnace.

[0014] Preferably, the monitoring robot comprises: a sensor water-proof layer and a magnesium-chromium component protective cover;

[0015] The sensor water-insulating layer includes an inter-electrode isolation electrode, a measuring electrode, an electrode end annular shielding electrode, a signal transmission cable and an inner tube of the casing which are connected in sequence;

[0016] The sensor water-insulating layer has a built-in sensor, which includes a thermistor temperature sensor and a pressure sensor, which are used to collect the molten pool temperature and the molten pool density respectively.

[0017] Preferably, the monitoring robot moves in a spiral manner in the furnace;

[0018] The shell material of the monitoring robot is magnesia-chrome brick.

[0019] Preferably, the monitoring robot is connected to a sensor data collection box, and the sensor data collection box is used to store the uniformity index.

[0020] Preferably, the processing module adopts a computer connected to the sensor data collection box, and the computer includes:

[0021] An analysis unit, used to analyze and judge the uniformity index based on a chaotic enhanced stirring model to obtain a data signal;

[0022] The optimization unit is used to optimize the chaos enhanced stirring model according to the data signal to obtain an optimized chaos enhanced stirring model.

[0023] Preferably, the blowing module is placed on the bottom blowing kit in the smelting furnace, and a spray gun assembly is used, and the spray gun assembly includes: a pipe body section and a cooling water circulation system connected in sequence;

[0024] The pipe body section includes a fuel pipe, a first air pipe, a water cooling sleeve and a second air pipe which are connected in sequence.

[0025] The technical effects of the present invention are:

[0026] The real-time monitoring robot arranged at the bottom of the metal molten pool furnace of the present invention is beneficial to reducing the metal mixing time, promoting the floating of inclusions, and uniforming the temperature and composition, which is beneficial to reducing the dead zone at the far end of the molten pool, expanding the stirring area, reducing the splashing height, and improving the heat transfer efficiency; the real-time monitoring robot collects data in the furnace, and adjusts the oxygen-enriched blowing amount through frequency conversion technology to put the melt flow in a chaotic state, thereby achieving rapid and uniform mixing of the melt, and overcoming the technical difficulties of severe molten pool splashing, insufficient oxygen-enriched utilization, and difficulty in large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 is a structural diagram of a furnace in an embodiment of the present invention;

[0029] Among them: 1-furnace body, 2-smoke exhaust port, 3-No. 1 feeding port, 4-No. 2 feeding port, 5-furnace body water jacket, 6-slag outlet, 7-furnace bottom refractory bricks, 8-support jack, 9-copper outlet, 10-bottom blowing kit, 11-sensor, 12-internal furnace bottom, 13-sensor data collection box, 14-computer;

[0030] Figure 2 is a structural diagram of a monitoring robot in an embodiment of the present invention;

[0031] Wherein: 15-inner tube of casing, 16-signal transmission cable, 17-water-insulating layer of sensor, 18-isolation electrode between electrodes, 19-measuring electrode, 20-ring shielding electrode at electrode end, 21-magnesium-chromium component protective sleeve. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Embodiment 1

[0034] like Figure 1-2As shown, in this embodiment, a real-time monitoring device in a molten pool smelting furnace during a bottom blowing and stirring process is provided, including: 1-furnace body, 2-smoke exhaust port, 3-No. 1 feed port, 4-No. 2 feed port, 5-furnace body water jacket, 6-slag outlet, 7-furnace bottom refractory bricks, 8-support jack, 9-copper outlet, 10-bottom blowing kit, 11-sensor, 12-internal furnace bottom, 13-sensor data collection box, 14-computer, 15-inner tube of casing, 16-signal transmission cable, 17-sensor water-insulating layer, 18-inter-electrode isolation electrode, 19-measuring electrode, 20-electrode end annular shielding electrode, 21-magnesium-chromium component protection sleeve.

[0035] The monitoring robot device in the furnace can be implemented and mainly includes: 16-signal transmission cable, 17-sensor water-insulating layer, 18-electrode isolation electrode, 19-measuring electrode, 20-electrode end annular shielding electrode, 21-magnesium-chromium component protection cover, and a real-time monitoring robot in the molten pool smelting furnace during bottom blowing and stirring process detects signal data which is transmitted to 14-computer by 16-signal transmission cable.

[0036] The monitoring robot is placed in a molten pool smelting furnace, which includes a supporting jack 8 and a furnace body 1 arranged on the supporting jack 8. The top of the furnace body 1 is provided with a No. 1 feed port 3 and a smoke exhaust port 2; the first side wall is provided with a No. 2 feed port 4 and a furnace body water jacket 5; the second side wall is provided with a copper outlet 9 and a slag outlet 6; the internal furnace bottom 12 includes furnace bottom refractory bricks 7 and a bottom blowing kit 10. The bottom blowing kit 10 includes a spray gun assembly, which is penetrated on the bottom, and the spray gun assembly includes a pipe body section and a cooling water circulation system connected to the pipe body section, and the pipe body section includes a fuel pipe, a first air duct, a water cooling jacket and a second air duct arranged in sequence from the inside to the outside. When the spray gun starts to spray and the bubble group is turbulent during the stirring process, the monitoring robot moves in a spiral manner, collects the temperature and density of the molten pool to characterize the uniformity of the solution and transmits it to the computer, and then the chaos enhanced stirring model analyzes and judges the uniformity index. The chaos enhanced stirring model adopts a chaos enhanced stirring program, and then returns the data signal to the spray gun. The spray gun adjusts the size of the gas flow and the amount of oxygen-enriched spraying according to the uniformity index, and the mixing uniformity is used to enhance the heat exchange. This embodiment improves the solution distribution uniformity of the oxygen-enriched bottom blowing molten pool smelting furnace and the real-time monitoring of the temperature and density of each area.

[0037] It is feasible that the sensor waterproof layer 17 of the monitoring robot includes: an inter-electrode isolation electrode 18, a measuring electrode 19, an electrode end annular shielding electrode 20, a signal transmission cable 16 and an inner tube 15 of the casing connected in sequence; a sensor 11 is built into the sensor waterproof layer 17, and the sensor 11 includes a thermistor temperature sensor and a pressure sensor, which are respectively used to collect the molten pool temperature and the molten pool density.

[0038] It is feasible that the outer shell material of the monitoring robot in the furnace is magnesia-chrome brick, which is resistant to high temperature of 1500°C.

[0039] It is feasible that the monitoring robot in the furnace moves in a spiral manner in the furnace.

[0040] It is feasible that a monitoring robot in the furnace can detect the temperature and density of the molten pool in the furnace.

[0041] It is feasible that the monitoring robot in the furnace can transmit signals to the sensor data collection box 13, the computer 14 receives the signals in the sensor data collection box 13, and analyzes and judges according to the uniformity index through the chaos enhanced stirring program, optimizes the program and regulates the gas flow and oxygen-rich gas of the nozzle.

[0042] In this embodiment, the material is fed into the molten pool area of ​​the furnace body through the No. 1 feed port 3, and the bottom blowing can be moved to all areas of the molten pool, and multiple types of oxygen-rich gases mixed with fuel are sprayed into the molten pool area, so that the melt vortexes and churns, and the melt churns to form a large number of dispersed bubbles, so that the molten pool area produces a violent stirring effect. After a period of time, the oxygen required for the reaction is sprayed in, and the atmosphere inside the furnace body is adjusted to ensure that the flue gas is discharged in compliance with the standards, thereby achieving safe, environmentally friendly and continuous and stable production. This embodiment can be applied to copper mines: the reaction of oxygen and sulfur in the copper mine is sufficient to achieve self-heating smelting, and the energy consumption of copper is reduced from 4149kgce to 1466kgce, a decrease of 64.7%. The stirring monitoring robot of the bottom-blowing molten pool smelting furnace has stronger adaptability to raw materials and furnace condition adjustment capabilities, better thermodynamic and kinetic conditions, improved production operation rate, improved recovery rate of non-ferrous metals and precious metals, better environmental protection effect, and reduced investment and production operation costs.

[0043] The real-time monitoring robot of this embodiment can be combined with the ladle argon blowing process when used. Under the stirring action of the bubble group, the monitoring robot can even out the temperature and composition, better control the residence time of the argon bubbles in the molten steel, expand the distribution range of the argon bubbles in the molten steel, reduce the impact of the argon bubbles on the slag layer, and achieve better metallurgical effects.

[0044] Embodiment 2

[0045] This embodiment is applied to the Isa furnace of a company in Yunnan. When the spray gun starts to spray and the bubble group is turbulent during the stirring process, the robot moves in a spiral manner, collects the temperature and density of the Isa furnace to characterize the uniformity of the solution and transmits it to the computer. Then the program of chaos-enhanced stirring analyzes and judges according to the uniformity index, and then returns the data signal to the spray gun. The spray gun adjusts the size of the gas flow and the amount of oxygen-enriched spray according to the uniformity index, and strengthens the heat exchange by mixing uniformity. The uniformity of the heating temperature can be accurate to within 5°C, the yield rate is increased by 10.3%, the energy consumption is reduced by 18.2%, the annual average energy saving is more than 7.2 million tons of standard coal, and the economic benefits are 8.9 million yuan / year, and the carbon emissions are reduced by 29.91 million, which is 29.49% less than the conventional scenario, and the carbon trading amount can reach more than 1.8 billion yuan.

[0046] Embodiment 3

[0047] This embodiment is applied to the bottom-blowing molten pool smelting furnace of a smelting plant of a company in Sichuan. When the spray gun of the molten pool smelting furnace starts to spray, and when the bubble group is turbulent during the stirring process, the robot moves in a spiral manner, collects the temperature and density of the molten pool to characterize the uniformity of the solution and transmits it to the computer. Then the program of chaos-enhanced stirring analyzes and judges according to the uniformity index, and then returns the data signal to the spray gun. The spray gun adjusts the size of the gas flow and the amount of oxygen-enriched spray according to the uniformity index, and mixes the uniformity to enhance the heat exchange. The results of synergistic slag composition, flue gas analysis, performance analysis of furnace-out products, and interval sampling analysis improve the mixing uniformity of the molten pool while reducing the splashing of the melt. The life of the furnace body is increased from two years to three years and four months, the production capacity is increased by 14.63%, the annual average energy saving is more than 5.2 million tons of standard coal, and the economic benefits are about 7.13 million yuan / year. Carbon emissions are reduced by 16.81 million, which is 19.24% less than the conventional scenario, and the carbon trading amount can reach more than 900 million yuan.

[0048] The working principle of this embodiment is similar to that of a gastroscopy capsule. When the spray gun starts to spray and the bubble group is turbulent during the stirring process, the detector enters the molten pool from the feed port 4 and moves in a spiral manner to collect the temperature and concentration of the molten pool to characterize the uniformity of the solution. The data signal is transmitted to the sensor data collection box 13. After the data is collected, the sensor data collection box 13 transmits it to the computer 14 for data processing and display. Then, the chaos enhanced stirring program analyzes and judges according to the indicators, and then returns the data signal to the spray gun 10. The spray gun 10 adjusts the size of the gas flow and the oxygen-enriched spraying amount according to the diagnosis made by the computer 14 for data processing and display. The detector accurately identifies the distribution of the molten liquid and the uniformity of the temperature, and enhances the heat exchange with the uniformity of bubble growth, coalescence and bubble flow stirring and mixing. The present invention improves the uniformity of solution distribution and the real-time monitoring of temperature and density in each area of ​​the oxygen-enriched bottom blowing molten pool smelting furnace.

[0049] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A real-time monitoring device in a molten pool smelting furnace during bottom blowing and stirring. It is characterized in that include: A monitoring module, used to collect uniformity indicators using a monitoring robot; the uniformity indicators include molten pool temperature and molten pool density; A processing module, connected to the monitoring module, for analyzing and judging the uniformity index to obtain a data signal; A spray module, connected to the processing module, for adjusting the spray gun gas flow rate and oxygen-enriched spraying amount based on the data signal; The monitoring robot comprises: a sensor water-proof layer and a magnesium-chromium component protective cover; The sensor water-insulating layer includes an inter-electrode isolation electrode, a measuring electrode, an electrode end annular shielding electrode, a signal transmission cable and an inner tube of the casing which are connected in sequence; The sensor water-insulating layer has a built-in sensor, and the sensor includes a thermistor temperature sensor and a pressure sensor, which are used to collect the molten pool temperature and the molten pool density respectively; The monitoring robot moves in a spiral manner in the furnace; The shell material of the monitoring robot is magnesia-chrome brick; The monitoring robot is connected to a sensor data collection box, and the sensor data collection box is used to store the uniformity index; The processing module uses a computer connected to the sensor data collection box, and the computer includes: An analysis unit, used to analyze and judge the uniformity index based on a chaotic enhanced stirring model to obtain a data signal; The optimization unit is used to optimize the chaos enhanced stirring model according to the data signal to obtain an optimized chaos enhanced stirring model.

2. The real-time monitoring device in the molten pool smelting furnace during the bottom blowing and stirring process according to claim 1, It is characterized in that The monitoring module is placed in a molten pool smelting furnace, and the molten pool smelting furnace includes a supporting jack and a furnace body arranged on the supporting jack; a first feed port and a smoke exhaust port are arranged on the top of the furnace body; The first side wall of the furnace body is provided with a second feed inlet, a furnace body water jacket, and a slag outlet; The second side wall of the furnace body is provided with a copper outlet; The bottom of the furnace body comprises furnace bottom refractory bricks and a bottom blowing kit.

3. The real-time monitoring device in the molten pool smelting furnace during the bottom blowing and stirring process according to claim 2, It is characterized in that The furnace water jacket is used to protect the inner shell of the smelting furnace.

4. The real-time monitoring device in the molten pool smelting furnace during the bottom blowing and stirring process according to claim 1, It is characterized in that The spray module is placed on the bottom blowing kit in the smelting furnace, and adopts a spray gun assembly, which includes: a pipe body section and a cooling water circulation system connected in sequence; The pipe body section includes a fuel pipe, a first air pipe, a water cooling sleeve and a second air pipe which are connected in sequence.

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