A ladle mold experiment device and an experiment method thereof

Abstract

The application discloses a ladle model experiment device and an experiment method thereof, and belongs to the technical field of ladle model experiments. The ladle model experiment device comprises a ladle model main body, a flowmeter, an air compressor and an electric conductivity instrument. The ladle model main body is made of transparent organic glass. Five piston holes with the same size are arranged at five different positions of the bottom of the ladle model main body. Air bricks are arranged in the piston holes. The air bricks are connected with the air outlet of the air compressor through air blowing hoses. The flowmeter is arranged on the air blowing hoses. The experiment method of the ladle model experiment device is characterized in that the blowing flow value is observed through the flowmeter, the air compressor is used to stabilize the pressure and adjust the flow at the same time, and the electric conductivity instrument is used to quantitatively measure the liquid mixing behavior. Therefore, the operator can scientifically, quantitatively and quickly simulate experiment research to obtain the best blowing mode and the most suitable blowing condition of the bottom blowing argon ladle refining, and the economic benefit of steel production is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ladle model experiment, in particular to a ladle model experiment device and an experiment method thereof. BACKGROUND

[0002] With the advancement of modernization, the demand for high-quality special steel promotes the rapid development of China's steel industry, and the quality of molten steel directly affects the quality of steel products, so refining has become an indispensable process in modern metallurgical process. The ladle bottom argon blowing method has become an indispensable process in the steelmaking process due to its good refining effect, easy cooperation with other process flows, and other advantages. However, it is difficult to master the best blowing mode and the most suitable blowing condition of the bottom argon blowing ladle refining in the prior art, and there is an urgent need for a device to simulate experiment to measure the best blowing position and argon blowing amount of the ladle bottom argon blowing process. SUMMARY

[0003] The purpose of the present application is to provide a ladle model experiment device, which is made of transparent organic glass material, and the flowmeter, air compressor and conductivity meter are used to conduct ladle bottom argon blowing experiment research work, so as to facilitate the research on the best blowing mode and the most suitable blowing condition of the bottom argon blowing ladle refining, and solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] A ladle model experiment device, comprising a ladle model main body, a flowmeter, an air compressor and a conductivity meter, the ladle model main body is made of transparent organic glass material, the bottom of the ladle model main body is provided with five different positions of piston holes with the same size, the piston holes are provided with air bricks, the air bricks are connected with the air outlet of the air compressor through the blowing hose, the flowmeter is arranged on the blowing hose, the flowmeter is arranged between the ladle model main body and the air compressor, the conductivity meter is connected with a first conductivity electrode probe, a second conductivity electrode probe and a third conductivity electrode probe through wires, and the first conductivity electrode probe, the second conductivity electrode probe and the third conductivity electrode probe are arranged on the inner wall of the ladle model main body.

[0006] Preferably, the air brick is provided with an air block and a telescopic sleeve, the air block is sleeved in the telescopic sleeve, the telescopic sleeve is provided with a clamping hole, the inner wall of the piston hole is provided with a clamping part, and the telescopic sleeve is connected with the piston hole by clamping the clamping hole in the clamping part.

[0007] Preferably, the air block is provided with a slit type blowing block, a side blowing six hole type blowing block and a side blowing five hole type blowing block.

[0008] Preferably, the ladle model body is built according to the actual size of the ladle in the ratio of 1:2.5, and the ladle model body is a topless cylinder with a height of 1.42 m and a top diameter of 1.15 m.

[0009] Preferably, the five different positions of the piston hole at the bottom of the ladle model body are the center position, the 0.25R position, the 0.43R position, the 0.5R position and the 0.67R position at the bottom, respectively.

[0010] Preferably, the air compressor adjusts the blowing flow by changing the rotating speed, and the air compressor can adjust eight blowing flows, which are 0.2L / min, 0.4L / min, 0.6L / min, 2.6L / min, 5.2L / min, 7.8L / min, 11.4L / min and 15.6L / min, respectively.

[0011] Another technical problem to be solved by the present application is to provide an experimental method of the ladle model experimental device, that is, a simulation experiment method for the mixing behavior of the liquid in the ladle and the change of the slag layer at the top of the ladle under different blowing conditions, in which water, air and edible oil are used to simulate the molten steel, argon and steel slag in actual production, respectively, and saturated salt water is used as a stimulus-response signal, and the experimental method comprises the following steps:

[0012] S1, the five blowing positions at the bottom of the ladle model body and the eight adjustable blowing flows of the air compressor are combined into different test schemes by the control variable method, each experimental scheme is carried out twice, and the final result is averaged;

[0013] S2, the first and third conductivity electrode probes are fixed at the same height on the inner wall of the ladle model body and are located at the same horizontal diameter position as the slit blowing block, the second conductivity electrode probe is fixed at the lower part of the inner wall of the ladle model body and is located at the middle position of the horizontal line connecting the first and third conductivity electrode probes, and when the gas permeable brick is not at the center position, the first conductivity electrode probe is close to the gas permeable brick and the third conductivity electrode probe is away from the gas permeable brick;

[0014] S3, after the experimental device is connected, the air compressor is turned on to stabilize the pressure, then the air volume is adjusted, 1225ml of water is loaded into the ladle model body 1, and after the liquid in the ladle model body 1 is stabilized, 300ml of saturated salt water is added into the ladle model body 1, while the conductivity meter is turned on to quantitatively detect the mixing of the solution;

[0015] S4, by analyzing the quantitative data measured by the conductivity meter, the mixing time of the liquid in the ladle model main body under various parameter conditions is calculated, the experimental results are analyzed, the blowing effect of the scheme with the minimum mixing time is best, and the best blowing scheme of the ladle model can be deduced through the similarity principle, and the mixing degree of 0.95 is selected in the experiment;

[0016] S5, remove the first electric conductivity probe, the second electric conductivity probe, the third electric conductivity probe and the conductivity meter, connect the remaining components, open the air compressor to stabilize the pressure, adjust the blowing flow to a smaller position, then add 1225ml water to simulate the molten steel, slowly add rapeseed oil along the inner wall of the ladle model main body 1 to simulate the molten slag, the oil layer thickness is 35ml, after the oil layer is stable, slowly adjust the air volume to find the critical air volume size when the simulated slag layer is nakedly leaked, observe and record the naked leakage of the slag eye under different air volume sizes, analyze the relationship between the air volume size and the naked leakage area of the slag layer after the experiment, and deduce the appropriate blowing flow of the ladle prototype.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] The ladle model experimental device and the experimental method thereof are provided, according to the actual size of the ladle, a model is built in a proportion of 1:2.5 in size by using transparent organic glass material, which is convenient for the operator to observe the internal condition and improves the experimental efficiency, and the flowmeter, air compressor and conductivity meter are arranged to carry out the ladle bottom argon blowing experimental research work, so that the operator can scientifically, quantitatively and quickly simulate the experimental measurement to deduce the best blowing position and argon blowing amount of the ladle bottom argon blowing process, thereby the best blowing mode and the most suitable blowing condition of the bottom argon blowing ladle refining are researched, the production quality is improved, and the economic benefit of steel production is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of a ladle model experimental device of the present application;

[0020] Figure 2 It is a structure schematic view of a ladle model main body of the present application;

[0021] Figure 3 It is a top view of the ladle model main body of the present application;

[0022] Figure 4 It is a structure schematic view of a piston hole of the present application;

[0023] Figure 5 It is a structure schematic view of a gas permeable brick of the present application;

[0024] Figure 6 It is a structure schematic view of a slit type blowing block of the present application;

[0025] Figure 7 A side blowing six-hole blowing block structure schematic diagram of the present application;

[0026] Figure 8 A side blowing five-hole blowing block structure schematic diagram of the present application.

[0027] In the figure: 1, ladle model main body; 11, piston hole; 111, clamping part; 2, flow meter; 3, air compressor; 31, air outlet; 4, conductivity meter; 41, first conductivity electrode probe; 42, second conductivity electrode probe; 43, third conductivity electrode probe; 5, air brick; 51, air block; 511, slit blowing block; 512, side blowing six-hole blowing block; 513, side blowing five-hole blowing block; 52, telescopic sleeve; 521, clamping hole; 6, blowing hose. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0029] To solve the existing problems, please refer to Figures 1-3 The technical solutions are provided in the embodiments as follows:

[0030] A ladle model experimental device, comprising a ladle model main body 1, a flow meter 2, an air compressor 3 and a conductivity meter 4, the ladle model main body 1 is made of transparent organic glass material, so as to facilitate the observation of the flow behavior of the fluid in the ladle during the experiment, the same size piston holes 11 are arranged at five different positions of the bottom of the ladle model main body 1, the air brick 5 is clamped in the piston hole 11, the air brick 5 is connected to the air outlet 31 of the air compressor 3 through the blowing hose 6, the flow meter 2 is arranged on the blowing hose 6 between the ladle model main body 1 and the air compressor 3, the flow meter 2 is provided with two specifications of 0-0.6L / min and 0-20L / min, the conductivity meter 4 is connected with a first conductivity electrode probe 41, a second conductivity electrode probe 42 and a third conductivity electrode probe 43 through wires, and the first conductivity electrode probe 41, the second conductivity electrode probe 42 and the third conductivity electrode probe 43 are arranged on the inner wall of the ladle model main body 1.

[0031] Please refer to Figure 2 and Figure 4The air brick 5 is composed of two parts of the air brick 51 and the telescopic sleeve 52, the air brick 51 is sleeved in the telescopic sleeve 52, four clamping holes 521 are arranged on the telescopic sleeve 52 in an axisymmetric mode, four clamping pieces 111 are arranged on the inner wall of the piston hole 11 in an axisymmetric mode, the diameter of the bottom of the telescopic sleeve 52 is equal to the sum of the length of the protrusion of one clamping piece 111, and the telescopic sleeve 52 is clamped and connected in the piston hole 11 by clamping the clamping hole 521 and the clamping piece 111.

[0032] Please refer to Figures 4-7 The air brick 51 has three different styles: the slit type air blowing block 511, the side blowing six hole type air blowing block 512 and the side blowing five hole type air blowing block 513, so as to cooperate with the research on the influence of different air blowing elements in the simulation experiment.

[0033] Please refer to Figures 1-4 The ladle model main body 1 is built according to the actual size of the ladle in a ratio of 1:2.5, which is convenient for observation and research, and the ladle model main body 1 is a topless cylinder (convenient for pouring liquid), with a height of 1.42m and a top diameter of 1.15m.

[0034] The five different positions of the piston hole 11 at the bottom of the ladle model main body 1 are the center position at the bottom, the 0.25R position, the 0.43R position, the 0.5R position and the 0.67R position, which are convenient for the research on the influence of different air blowing positions.

[0035] The air compressor 3 adjusts the air blowing flow by changing the rotating speed, and the air compressor 3 in the experiment can adjust eight air blowing flows of 0.2L / min, 0.4L / min, 0.6L / min, 2.6L / min, 5.2L / min, 7.8L / min, 11.4L / min and 15.6L / min, which is convenient for the research on the influence of different air blowing flows.

[0036] Another technical problem to be solved by the present application is to provide an experimental method of the ladle model experimental device, that is, a simulation experiment method for the mixing behavior of the liquid in the ladle and the change of the slag layer at the top of the ladle under different air blowing conditions, water, air and edible oil are used to simulate the molten steel, argon and steel slag in actual production respectively, and saturated salt water is used as a stimulus-response signal, so that the experiment can be carried out in a normal temperature environment, avoiding the danger brought by the high temperature environment in the actual production process, and the experimental method comprises the following steps:

[0037] Step one, by controlling variable method, the five air blowing positions at the bottom of the ladle model main body 1 and the eight adjustable air blowing flows of the air compressor 3 are combined into different test schemes, each test scheme is carried out twice, and the final result is taken as an average value;

[0038] Step two, in the experiment of studying the influence of blowing mode on the mixing behavior of molten steel, the first and third conductivity electrode probes 41 and 43 are fixed at the same height on the inner wall of the ladle model body 1 and are at the same horizontal diameter position as the slit blowing block 511, and the second conductivity electrode probe 42 is fixed on the lower part of the inner wall of the ladle model body 1 and is at the middle position of the horizontal line connecting the first and third conductivity electrode probes 41 and 43. When the air brick 5 is not at the bottom center position, the first conductivity electrode probe 41 is close to the air brick 5, and the third conductivity electrode probe 43 is far away from the air brick 5;

[0039] Step three, after connecting the experimental device, turn on the air compressor 3 to stabilize the pressure, then adjust the air flow by adjusting the speed of the air compressor 3, fill 1225ml water into the ladle model body 1, wait for the liquid in the ladle model body 1 to stabilize, then add 300ml saturated brine into the ladle model body 1, and start the conductivity meter 4 to quantitatively detect the mixing of the solution;

[0040] Step four, by analyzing the quantitative data measured by the conductivity meter 4, the mixing time of the liquid in the ladle model body 1 under each parameter condition is calculated. Mixing time is a key data for analyzing the mixing of molten steel. The mixing time of ladle refining is affected by many factors. This experiment mainly analyzes the mixing time in the ladle refining process from three aspects: the influence of blowing amount on the mixing time of the ladle, the influence of blowing position on the mixing time of the ladle, and the influence of blowing components on the mixing time of the ladle.

[0041] By analyzing the experimental results, the mixing time of the scheme with the smallest mixing time is the best blowing effect. Through the similarity principle, the best blowing scheme of the ladle model can be deduced. The experiment selects a mixing degree of 0.95.

[0042] Step five, the research experiment on the influence of blowing mode on the bare leakage behavior of the slag layer on the top of the ladle is as follows:

[0043] In the experiment, the first, second and third conductivity electrode probes 41, 42 and 43 are removed, and the conductivity meter 4 is not used for quantitative measurement of the mixing behavior of the liquid. After connecting the remaining components except the conductivity meter 4, turn on the air compressor 3 to stabilize the pressure, adjust the blowing flow to a smaller position by adjusting the speed of the air compressor 3, then add 1225ml water to simulate molten steel, wait for the liquid to stabilize, then slowly add rapeseed oil along the inner wall of the ladle model body 1 to simulate the slag, and the oil layer thickness is 35ml. After the oil layer is stable, slowly adjust the air volume to find the critical air volume size when the simulated slag layer is bare, and observe and record the bare leakage condition of the slag eye under different air volume sizes. After the experiment, analyze the relationship between the air volume size and the bare leakage area of the slag layer to deduce the appropriate blowing flow of the ladle prototype to avoid causing the bare leakage of the slag layer and the oxidation and pollution of the molten steel.

[0044] In summary: the steel ladle model experiment device and the experiment method thereof, according to the actual steel ladle's each size, adopt transparent organic glass material according to 1:2.5 proportion size to build model, convenient for operator to observe internal condition, improve experiment efficiency, and through setting flowmeter 2, observe blowing flow value, through setting air compressor 3, stabilize pressure and simultaneously have the adjustment flow, through setting conductivity instrument 4, carry out quantitative measurement of liquid mixing behavior, through the setting of the above three main components, carry out the steel ladle bottom argon blowing experiment research work, make the operator scientific, quantitative, fast simulate experiment measurement and push out the best blowing position of steel ladle bottom argon blowing process, argon blowing amount, thereby research the best blowing mode and the most suitable blowing condition of bottom argon blowing steel ladle refining, promote to improve production quality, improve steel production economic benefit.

[0045] It should be noted that the relational terms herein, such as first and second, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0046] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the following claims and their equivalents.

Claims

1. An experimental method of a ladle mold experiment apparatus, characterized by: The simulation experiment method for mixing behavior of liquid in the ladle and change of slag layer on the top of the ladle under different blowing conditions, in which water, air and edible oil are used to simulate molten steel, argon and steel slag in actual production respectively, and saturated brine is used as stimulation-response signal, comprises the following steps: S1, different test schemes are formed by controlling variable method for five blowing positions of the bottom of the ladle model body (1) and eight adjustable blowing flow rates of the air compressor (3), each test scheme is carried out twice, and the final result is taken as an average value; S2, the first conductivity electrode probe (41) and the third conductivity electrode probe (43) are fixed at the same height on the inner wall of the ladle model body (1) and are located at the same horizontal diameter position of the slit blowing block (511), the second conductivity electrode probe (42) is fixed on the lower part of the inner wall of the ladle model body (1) and is located at the middle position of the horizontal line connecting the first conductivity electrode probe (41) and the third conductivity electrode probe (43), when the air brick (5) is not at the center position of the bottom, the first conductivity electrode probe (41) is close to the air brick (5), and the third conductivity electrode probe (43) is away from the air brick (5); S3, after the experimental device is connected, the air compressor (3) is turned on to stabilize the pressure, then the air volume is adjusted, 1225ml of water is loaded into the ladle model body (1), after the liquid in the ladle model body (1) is stable, 300ml of saturated brine is added into the ladle model body (1), at the same time, the conductivity meter (4) is started to quantitatively detect the mixing of the solution; S4, the mixing time of the liquid in the ladle model body (1) under each parameter condition is calculated by analyzing the quantitative data measured by the conductivity meter (4), the experimental results are analyzed, the blowing effect of the scheme with the smallest mixing time is the best, the best blowing scheme of the ladle model can be deduced through the similarity principle, and the mixing degree of 0.95 is selected in the experiment; S5, the first conductivity electrode probe (41), the second conductivity electrode probe (42), the third conductivity electrode probe (43) and the conductivity meter (4) are removed, after the remaining components are connected, the air compressor (3) is turned on to stabilize the pressure, the blowing flow rate is adjusted to a smaller position, then 1225ml of water is added to simulate molten steel, after the liquid is stable, rapeseed oil is slowly added along the inner wall of the ladle model body (1) to simulate steel slag, the oil layer thickness is 35ml, after the oil layer is stable, the air volume is slowly adjusted to find the critical air volume size when the simulated slag layer is naked, the naked leakage of the slag eye under different air volume sizes is observed and recorded, and the relationship between the air volume size and the naked leakage area of the slag layer is analyzed after the experiment to deduce the blowing flow rate of the ladle prototype.

2. A ladle mold experimental device applied to the experimental method of the ladle mold experimental device of claim 1, comprising a ladle mold main body (1), a flow meter (2), an air compressor (3) and an electrical conductivity meter (4), characterized in that: The ladle model body (1) is made of transparent organic glass material, and the bottom of the ladle model body (1) is provided with five piston holes (11) of the same size at different positions, the piston hole (11) is provided with a gas permeable brick (5), the gas permeable brick (5) is connected with the air outlet (31) of the air compressor (3) through a blowing hose (6), the flow meter (2) is arranged on the blowing hose (6), the flow meter (2) is arranged between the ladle model body (1) and the air compressor (3), the conductivity meter (4) is connected with the first conductivity electrode probe (41), the second conductivity electrode probe (42) and the third conductivity electrode probe (43) through wires, and the first conductivity electrode probe (41), the second conductivity electrode probe (42) and the third conductivity electrode probe (43) are arranged on the inner wall of the ladle model body (1); The gas permeable brick (5) is provided with a gas permeable block (51) and a telescopic sleeve (52), the gas permeable block (51) is sleeved in the telescopic sleeve (52), the telescopic sleeve (52) is provided with a clamping hole (521), the inner wall of the piston hole (11) is provided with a clamping part (111), and the telescopic sleeve (52) is connected with the piston hole (11) by clamping the clamping hole (521) on the clamping part (111); The gas permeable block (51) is provided with a slit type blowing block (511), a side blowing six hole type blowing block (512) and a side blowing five hole type blowing block (513) three different styles; The five different positions of the piston hole (11) at the bottom of the ladle model body (1) are the center position at the bottom, the 0.25R position, the 0.43R position, the 0.5R position and the 0.67R position.

3. The ladle mold experiment apparatus according to claim 2, characterized by: The ladle model body (1) is built according to the actual size of the ladle in the proportion of 1:2.5, the ladle model body (1) is a topless cylinder, the height is 1.42m, and the top diameter is 1.15m.

4. The ladle mold experiment apparatus according to claim 2, characterized by: The air compressor (3) adjusts the blowing flow by changing the rotating speed, and the air compressor (3) can adjust eight blowing flows, which are 0.2L / min, 0.4L / min, 0.6L / min, 2.6L / min, 5.2L / min, 7.8L / min, 11.4L / min and 15.6L / min.

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