CN108982578B - Method for simulating molten steel solidification process - Google Patents
Method for simulating molten steel solidification process Download PDFInfo
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- CN108982578B CN108982578B CN201810861181.5A CN201810861181A CN108982578B CN 108982578 B CN108982578 B CN 108982578B CN 201810861181 A CN201810861181 A CN 201810861181A CN 108982578 B CN108982578 B CN 108982578B
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Abstract
The invention discloses a method for simulating a molten steel solidification process, and belongs to the technical field of steel continuous casting. The invention relates to a method for simulating a molten steel solidification process, which comprises the following steps that hot water in a hot water tank enters a heat exchange pool through a pipeline, and the hot water in the heat exchange pool heats a metal plate; the heating plate heats and preserves the temperature of the peripheral side walls of the experiment pool; and then pouring the experimental solution into the experimental tank, discharging hot water in the heat exchange tank, allowing cold water in the cold water tank to enter the heat exchange tank through a pipeline, cooling the metal plate by using the cold water in the heat exchange tank, crystallizing and separating out the experimental solution on the surface of the metal plate, and observing the crystallization process by using an observer. According to the invention, the crystallization behavior in the molten steel solidification process can be accurately and objectively researched by observing the crystallization precipitation process of the experimental solution on the metal plate.
Description
Technical Field
The invention relates to the technical field of steel continuous casting, in particular to a method for simulating a molten steel solidification process.
Background
The solidification process of molten steel determines the micro-morphology of a steel ingot or casting crystalline structure and influences the mechanical, physical and chemical properties of the steel. At present, the research at home and abroad aiming at the solidification process of the molten steel is mainly the research on the static structure of the molten steel after solidification; but the crystallization behavior in the molten steel is difficult to directly observe under the high-temperature condition, so that the dynamic research aiming at the solidification process of the molten steel is difficult to realize under the prior art condition; therefore, an experimental method for researching the crystallization behavior in the molten steel solidification process is urgently needed to be designed, and the design of the method has important theoretical value and practical significance.
At present, for the method problem of simulating the solidification process of molten steel, some solutions are also proposed in the prior art, such as patent publication nos: CN105014033A, published: 11, month and 4 in 2015, the invention is named as: the application discloses a method for simulating a continuous casting billet solidification structure growth process. The method comprises the following steps: melting and pouring steel materials simulating the solidification process of the continuous casting billet in a resistance furnace, wherein the length of a steel sample after pouring is 1/2 of the simulated thickness of the continuous casting billet; cooling one end of the steel sample by circulating water; the liquid phase temperature gradient of the steel sample is regulated and controlled by the heating furnace with segmented temperature control, and the moving speed of a solid-liquid interface is regulated and controlled by driving the heating furnace or the steel sample by using the linear motor to be consistent with the continuous casting billet, so that the growth process of a solidification structure of the continuous casting billet is simulated. The steel sample is melted and solidified under the protection of vacuum or high-purity atmosphere, and oxidation or element volatilization can be avoided. The method provided by the invention reproduces the solidification process of the continuous casting billet by using the small-size steel sample, and can observe the formation process of the solidification structure and the defects of the continuous casting billet and the influence rule of the continuous casting process parameters on the solidification structure of the continuous casting billet. However, the application scheme has the following disadvantages: the method for simulating the molten steel solidification process is complex and high in cost.
In conclusion, designing a method capable of simulating a molten steel solidification process is an urgent technical problem to be solved in the prior art.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect that the crystallization behavior of molten steel is difficult to directly observe under the high-temperature condition in the prior art, and provides a method for simulating the solidification process of molten steel, which can simulate the crystallization behavior in the solidification process of molten steel.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a method for simulating a molten steel solidification process, which comprises the following steps: the experimental tank is heated and insulated firstly, then the experimental solution is poured into the experimental tank, cold water is introduced into the heat exchange tank, the metal plate is cooled by the cold water in the heat exchange tank, the experimental solution is crystallized and separated out on the surface of the metal plate, and the crystallizing process is observed by using an observer.
As a further improvement of the invention, hot water in the hot water tank enters the heat exchange tank through a pipeline, and the hot water in the heat exchange tank heats the metal plate; the heating plate heats and preserves the temperature of the peripheral side walls of the experiment pool; and then pouring the experimental solution into the experimental tank, discharging hot water in the heat exchange tank, allowing cold water in the cold water tank to enter the heat exchange tank through a pipeline, cooling the metal plate by using the cold water in the heat exchange tank, crystallizing and separating out the experimental solution on the surface of the metal plate, and observing the crystallization process by using an observer.
As a further improvement of the invention, the temperature of the metal plate and the temperature of the peripheral side wall of the test cell are not lower than the temperature of the test solution before the test solution is poured into the test cell.
As a further improvement of the invention: the method comprises the following steps:
the method comprises the following steps: heating and heat preservation
Heating plates arranged outside the peripheral side walls of the experimental pond; hot water in the hot water tank is pumped into a heat exchange pool through a pipeline by a first water pump, and the hot water in the heat exchange pool heats the metal plate;
step two: adding the test solution
When the temperature of the metal plate is not lower than that of the experimental solution, pouring the experimental solution into the experimental pool;
step three: discharging hot water
Discharging hot water in the heat exchange tank from a water outlet;
step four: simulating the solidification process of molten steel
Cold water in the cold water tank enters the heat exchange tank through a pipeline, the cold water in the heat exchange tank cools the metal plate, the experimental solution is crystallized and separated out on the surface of the metal plate, and an observer is used for observing the crystallization process.
As a further improvement of the invention, the first step is as follows: the heating and heat preservation method comprises the following specific steps: heating plates arranged outside the peripheral side walls of the experimental tank electrically to enable the temperature of the peripheral side walls of the experimental tank to be not lower than that of the experimental solution; then, opening a first hot water valve and a first water pump, closing a first cold water valve and a water outlet valve, and opening a vent valve; hot water in the hot water tank flows into the heat exchange pool from the water inlet under the pumping action of the first water pump, and when the hot water overflows from the vent valve, the water outlet valve is opened, and the vent valve is closed; the hot water heats the metal plate in the process of flowing in and out of the heat exchange tank.
As a further improvement of the present invention, step three: the specific steps of discharging hot water are as follows: the first water pump is closed, then the first hot water valve is closed, and the vent valve is opened to enable the second water inlet pipe to be communicated with the outside; then the drainage valve makes first inlet tube and drainage case intercommunication, and the partial hot water in the first inlet tube is arranged to the drainage incasement, and hot water in the heat exchange pool is discharged by the delivery port.
As a further improvement of the present invention, step four: the method comprises the following specific steps of simulating the molten steel solidification process: closing the drainage valve and the water outlet valve, opening the first cold water valve to enable the cold water tank to be communicated with the first water inlet pipe, and simultaneously opening the first water pump; the first water pump pumps cold water in the cold water tank into the heat exchange pool, and when the vent valve overflows, the water outlet valve is opened, and meanwhile, the vent valve is closed; and the cold water continuously cools the metal plate in the process of flowing in and out of the heat exchange tank, and the experimental solution is crystallized and separated out on the surface of the metal plate.
As a further improvement of the invention, the test solution is NH4Aqueous Cl solution or Na2S2O3An aqueous solution.
As a further improvement of the invention, a method for simulating a molten steel solidification process by using a molten steel solidification simulation device comprises the following steps: the device comprises an experiment pool, a heating plate and a heating plate, wherein the bottom of the experiment pool is provided with a metal plate, and the heating plate is arranged outside the peripheral side wall of the experiment pool; the heat exchange device comprises a heat exchange pool, a water inlet is formed in one end of the heat exchange pool, a water outlet is formed in the other end of the heat exchange pool, an experiment pool is arranged on the heat exchange pool, and the heat exchange pool and the experiment pool are separated by a metal plate; the observation instrument is arranged above the experiment pool; the water supply unit comprises a hot water tank and a cold water tank, a hot water outlet pipe of the hot water tank is connected with a water inlet through a pipeline, a first hot water valve is installed on the hot water outlet pipe, a cold water outlet pipe of the cold water tank is connected with the water inlet through a pipeline, and a first cold water valve is installed on the cold water outlet pipe.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the method for simulating the solidification process of the molten steel, the peripheral side walls of the experiment pool are heated and insulated through the heating plates before the experiment solution is added, and the metal plate at the bottom of the experiment pool is heated and insulated through hot water in the hot water tank, so that the temperature of the peripheral side walls of the experiment pool and the temperature of the metal plate are not lower than that of the experiment solution, namely, the experiment pool and the metal plate are preheated, the experiment solution is prevented from being crystallized and separated immediately when added into the experiment pool, an experimenter can effectively observe the crystallization process of the experiment solution, the observation effect of the experiment is improved, and the defect that the crystallization behavior of the molten steel is difficult to directly observe under the high-temperature condition is overcome.
(2) According to the method for simulating the solidification process of the molten steel, the vent valve and the drainage valve are opened, hot water in the heat exchange tank is discharged from the water outlet, and hot water in the first water inlet pipe is discharged into the drainage box, so that when cold water is introduced into the heat exchange tank, the temperature of the cold water can be prevented from being influenced, the cooling effect of the cold water on the metal plate is ensured, and the accuracy of the experimental process is improved.
(3) According to the method for simulating the solidification process of the molten steel, the metal plate is cooled by cold water, so that the experimental solution is crystallized and separated out on the surface of the metal plate, and the metal plate is horizontally arranged at the bottom of the experimental tank, so that an experimenter can conveniently observe the experimental solution through an observer; store up ice-cube in the cold water storage cistern splendid attire for the cold water that lets in the heat exchange pond keeps the low temperature always, thereby has improved the cooling effect of cold water to the metal sheet, and then makes the experiment solution fully crystallize in the metal sheet surface and separate out, and the experimenter can carry out effectual observation, and then has improved the simulation effect of experiment.
(4) The invention relates to a method for simulating a molten steel solidification process, wherein an experimental solution is NH4Aqueous Cl solution, NH4The crystallization process of the Cl aqueous solution is similar to the crystallization behavior of the molten steel solidification process, NH4The law of natural convection in the crystallization process of Cl aqueous solution is the same as that in the solidification and crystallization process of molten steel, NH4The Cl solution has the characteristics of low melting enthalpy and low crystallization temperature, so that the temperature in the experimental process is low and is easy to control; in addition, due to NH4Transparency characteristics of aqueous Cl solution and NH4The semitransparent characteristic of the Cl dendrite enables experimenters to conveniently and clearly observe NH in the experimental process4The crystallization process of the Cl aqueous solution on the metal plate is improved, thereby improving the experimentAnd the effect is observed, so that the accuracy of the experimental process is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of an overall structure of a molten steel solidification simulation apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a heat exchange tank of the present invention;
FIG. 3 is a schematic view of the bottom structure of the experimental tank of the present invention;
FIG. 4 is a schematic structural view of the experimental tank without a metal plate at the bottom;
FIG. 5 is a schematic structural diagram of a heat exchange tank in embodiment 4 of the present invention;
FIG. 6 is a schematic view of the entire configuration of a molten steel solidification simulation apparatus according to embodiment 5 of the present invention;
FIG. 7 is a flow chart of a method of simulating a molten steel solidification process.
The reference numerals in the schematic drawings illustrate:
100. an experimental pond; 110. a metal plate; 120. a heat insulation groove; 130. heating plates; 140. a bubble brush; 150. a servo motor;
200. a heat exchange pool; 201. the top wall of the heat exchange pool; 202. an assembly port; 203. an inlet projection; 204. an outlet boss; 210. a water inlet; 220. a water outlet; 221. a water outlet valve; 230. a hot water tank; 231. a first hot water valve; 232. a second hot water valve; 233. a third hot water valve; 234. a drainage valve; 235. a vent valve; 240. a cold water tank; 241. a first cold water valve; 242. a second cold water valve; 250. a drainage box; 260. an ice storage chamber;
300. a first water pump; 310. a second water pump;
400. an observation instrument; 410. a guide rail;
500. a first water inlet pipe; 510. a second water inlet pipe; 520 a first water outlet pipe; 521. a second water outlet pipe; 530. a first hot water pipe; 531. a second hot water pipe; 532. a drainage tube; 533. a breather pipe; 540. a hot water outlet pipe; 550. a cold water inlet pipe; 560. and a cold water outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; moreover, the embodiments are not relatively independent, and can be combined with each other according to needs, so that a better effect is achieved. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1
According to the method for simulating the solidification process of the molten steel, hot water in the hot water tank 230 enters the heat exchange tank 200 through a pipeline, and the hot water in the heat exchange tank 200 heats the metal plate 110; the heating plate 130 heats and preserves the temperature of the peripheral side wall of the experimental pond 100; the experimental solution is poured into the experimental tank 100, then after the hot water in the heat exchange tank 200 is discharged, the cold water in the cold water tank 240 enters the heat exchange tank 200 through a pipeline, the cold water in the heat exchange tank 200 cools the metal plate 110, the experimental solution is crystallized and separated out on the surface of the metal plate 110, and the crystallization process is observed by using the observer 400. As shown in fig. 7, the specific steps are:
the method comprises the following steps: heating and heat preservation
step two: adding the test solution
When the temperature of the metal plate 110 is not lower than the temperature of the experimental solution, the experimental solution is poured into the experimental tank 100, and the experimental solution is NH4Aqueous Cl solution or Na2S2O3Aqueous solution, the experimental solution used in this example was NH4C1 saturated aqueous solution, the temperature of the added experimental solution is 80 plus or minus 2 ℃; the experiment tank 100 is subjected to preheating treatment, so that the experiment solution can be prevented from being immediately crystallized when being poured into the experiment tank 100;
step three: discharging hot water
The first water pump 300 is closed, then the first hot water valve 231 is closed, and the vent valve 235 is opened to enable the second water inlet pipe 510 to be communicated with the outside; then the drainage valve 234 enables the first water inlet pipe 500 to be communicated with the drainage box 250, part of hot water in the first water inlet pipe 500 is discharged into the drainage box 250, and the hot water in the heat exchange pool 200 is discharged from the water outlet 220; hot water in the heat exchange tank 200 is exhausted;
step four: simulating the solidification process of molten steel
Closing the flow guide valve 234 and the water outlet valve 221, and opening the first cold water valve 241, so that the cold water tank 240 communicates with the first water inlet pipe 500, while the first water pump 300 is turned on; the first water pump 300 pumps cold water in the cold water tank 240 to the heat exchange tank 200, when cold water overflows from the vent valve 235, the heat exchange tank 200 is filled with cold water, the water outlet valve 221 is opened to enable the cold water in the heat exchange tank 200 to flow out from the water outlet 220, meanwhile, the vent valve 235 is closed, the cold water continuously cools the metal plate 110 in the flowing-in and flowing-out process of the cold water in the heat exchange tank 200, the temperature of the metal plate 110 is rapidly reduced, the experimental solution is crystallized and precipitated on the surface of the metal plate 110, and meanwhile, the vertical crystallization and precipitation process of the experimental solution is observed by the observer 400.
The method for observing the simulated precipitated crystal by adopting the device comprises the following steps: the experimental solution is crystallized and precipitated on the surface of the metal plate 110 by using the above-mentioned steps, and the crystallization and precipitation process of the experimental solution is vertically observed by using the observer 400.
Referring to fig. 1 and 2, the molten steel solidification simulation apparatus of the present embodiment includes an experiment tank 100, a heat exchange tank 200, an observer 400, and a water supply unit, wherein a heat insulation member 120 is disposed at a bottom of a side wall of the experiment tank 100, an installation groove is disposed on the heat insulation member 120, a metal plate 110 is fitted in the installation groove, and the metal plate 110 may be a copper plate, an aluminum plate, or a silver plate; the copper plate adopted in the embodiment can ensure the heat-conducting property of the metal plate 110 on one hand, and has corrosion resistance and certain mechanical strength on the other hand, and the experiment cost is greatly reduced. The heat insulating member 120 prevents the metal plate 110 from directly contacting the heating plate 130, so that the metal plate 110 is not affected by the temperature of the heating plate 130 during the cooling process; the metal plate 110 is horizontally arranged, so that the observation instrument 400 can conveniently observe the crystallized product on the metal plate 110, and the observation effect is prevented from being influenced by the inclination generated between the observation instrument 400 and the metal plate 110; the heating plates 130 are arranged on the outer portions of the peripheral side walls of the experiment pool 100, the heating plates 130 are used for heating and insulating the peripheral side walls of the experiment pool 100, so that the experiment solution in the experiment pool 100 is prevented from being cooled and separated out on the inner sides of the peripheral side walls, experiment errors are reduced, the number of separated out crystals of the experiment solution on the metal plate 110 is further ensured, enough crystal samples can be separated out on the metal plate 110, observation is facilitated, and the simulation effect of the experiment is improved; the heating temperature of the heating plate 130 of the embodiment is 90 ± 2 ℃, and the heating plate 130 is provided with a temperature detector for detecting the temperature of the heating plate 130; heating plate 130 has the interval with heat exchange pond roof 201 for when heat exchange pond 200 lets in cold water, cold water temperature does not receive the influence of heating plate 130 temperature, and then can carry out the constant temperature cooling to metal sheet 110.
The heat exchange tank 200 is connected with the experiment tank 100, and is specifically explained as follows: the experiment tank 100 is arranged on the heat exchange tank 200, and the heat exchange tank 200 and the experiment tank 100 are separated by a metal plate 110; one end of the heat exchange tank 200 is provided with a water inlet 210, the other end of the heat exchange tank 200 is provided with a water outlet 220, and the height of the water inlet 210 is higher than that of the water outlet 220, so that water can thoroughly flow out of the water outlet 220 of the heat exchange tank 200, and the heating effect or the cooling effect of the metal plate 110 is improved.
The water supply unit is connected with the heat exchange tank 200, the water supply unit comprises a hot water tank 230 and a cold water tank 240, a hot water outlet pipe 540 of the hot water tank 230 is connected with the water inlet 210 through a pipeline, a first hot water valve 231 is installed on the hot water outlet pipe 540, and a heater is arranged in the hot water tank 230 and used for heating hot water in the hot water tank 230, so that the water temperature in the hot water tank 230 is maintained at 90 +/-2 ℃; the cold water outlet pipe 560 of the cold water tank 240 is connected with the water inlet 210 through a pipeline, the first cold water valve 241 is installed on the cold water outlet pipe 560, the ice storage chamber 260 is arranged in the cold water tank 240, ice cubes are contained in the ice storage chamber 260, and the ice cubes can cool water in the cold water tank 240, so that the water in the cold water tank 240 is kept in a low-temperature state, wherein the temperature of the water in the cold water tank 240 of the embodiment is 0-4 ℃, and the cooling effect on the metal plate 110 can be improved.
Wherein, the pipeline between the hot water outlet pipe 540 and the water inlet 210 is provided with a first water pump 300, and/or the pipeline between the cold water outlet pipe 560 and the water inlet 210 is provided with a first water pump 300; in this embodiment, the first water pump 300 is also disposed on the pipeline between the cold water outlet pipe 560 and the water inlet 210. The specific description is as follows: the hot water outlet pipe 540 and the cold water outlet pipe 560 are respectively connected with the first water inlet pipe 500, the lower part of the first water inlet pipe 500 is provided with a drainage box 250, the drainage box 250 is connected with the bottom of the first water inlet pipe 500 through a drainage pipe 532, the drainage pipe 532 is provided with a drainage valve 234, and the horizontal height of the drainage box 250 is lower than the height of all the pipelines mentioned above; when the residual water in the first water inlet pipe 500 needs to be discharged, the drainage valve 234 is opened to enable the first water inlet pipe 500 to be communicated with the drainage pipe 532, the residual water in the first water inlet pipe 500 can be rapidly discharged into the drainage box 250, and the hot water or the cold water in the heat exchange tank 200 can be rapidly replaced. The first water inlet pipe 500 is connected with the water inlet end of the first water pump 300, the water outlet end of the first water pump 300 is connected with the water inlet 210 through the second water inlet pipe 510, the water inlet pipe 510 is provided with a vent pipe 533, and the vent pipe 533 is provided with a vent valve 235; when the water in the heat exchange tank 200 and the first water inlet pipe 500 needs to be drained, the vent valve 235 on the vent pipe 533 is opened, so that the situation that the external pressure is higher than the internal pressure of the device in the drainage process is avoided, the water in the device is difficult to drain, and the water in the heat exchange tank 200 and the first water inlet pipe 500 can be smoothly drained.
In this embodiment, the observation instrument 400 is installed above the experimental tank 100, and the observation instrument 400 is slidably installed on the guide rail 410, so that the crystallization process of the experimental solution on the metal plate 110 can be conveniently and directly observed; the observation instrument 400 is slidably mounted on the guide rail 410, so that the observation instrument 400 can conveniently and comprehensively observe the crystallization process of the experimental solution on the metal plate 110.
According to the invention, the metal plate 110 is heated and insulated by the hot water in the hot water tank 230 before the experimental solution is added, so that the temperature of the metal plate 110 is not lower than that of the experimental solution, the experimental solution is prevented from being crystallized and separated immediately when being added into the experimental tank 100, experimenters are difficult to effectively observe the crystallization and separation process of the experimental solution, and the experimental effect is influenced.
Example 2
As shown in fig. 3 and 4, the basic content of this embodiment is the same as that of embodiment 1, except that: when the first water pump 300 pumps the hot water or the cold water into the heat exchange tank 200, bubbles are brought into the heat exchange tank 200, and the bubbles adhere to the lower portion of the metal plate 110. The bottom of the experimental tank 100 is provided with a slide rail, the slide rail is positioned at the lower part of the metal plate 110, the bubble brush 140 is slidably mounted on the slide rail, the bubble brush 140 is provided with a servo motor 150, and the servo motor 150 is used for driving the bubble brush 140 to slide back and forth along the length direction of the slide rail; the top of the bubble brush 140 contacts with the lower part of the metal plate 110, and the bubble brush 140 can wipe off bubbles attached to the bottom of the metal plate 110 in the reciprocating process, so that the attached bubbles are separated from the bottom of the metal plate 110, and the separated bubbles are discharged from the water outlet 220 under the driving of hot water or cold water, or the bubbles move to the top wall 201 of the heat exchange tank and are gathered on the top wall 201 of the heat exchange tank.
The level of the metal plate 110 is lower than that of the top wall 201 of the heat exchange tank, and the height difference between the metal plate 110 and the top wall 201 of the heat exchange tank is 3-10cm, in this embodiment 5 cm. The bubbles erased by the bubble brush 140 are gathered on the inner walls at the two ends of the top wall 201 of the heat exchange tank, and the bubbles are not attached to the lower part of the metal plate 110, so that the heating effect or the cooling effect of the water flow on the metal plate 110 is improved.
Example 3
The basic contents of this embodiment are the same as embodiment 1, except that: the bottom of the heat exchange tank 200 is connected with the hot water tank 230 through the second hot water pipe 531, and the third hot water valve 233 is arranged on the second hot water pipe 531, so that hot water can flow back to the hot water tank 230 along the second hot water pipe 531, thereby promoting the discharge of hot water and saving hot water resources; the third hot water valve 233 is provided on the second hot water pipe 531, so that the second hot water pipe 531 can be controlled to flow only hot water.
The water outlet 220 is connected with the water inlet end of the second water pump 310 through a first water outlet pipe 520, the water outlet end of the second water pump 310 is connected with a first hot water pipe 530 through a second water outlet pipe 521, the first hot water pipe 530 is positioned at the upper part of the hot water tank 230, so that the water outlet 220 is indirectly connected with the hot water tank 230, hot water used in the preheating process can be circulated into the hot water tank 230 through the first water outlet pipe 520, the second water pump 310 and the first hot water pipe 530, the hot water is recycled, and hot water resources are greatly saved; the first hot water pipe 530 is provided with a second hot water valve 232 for controlling a hot water recovery process. The first hot water pipe 530 is provided with a second hot water valve 232; the water outlet 220 is connected with the water inlet end of the second water pump 310 through a first water outlet pipe 520, the water outlet end of the second water pump 310 is connected with a cold water inlet pipe 550 through a second water outlet pipe 521, the cold water inlet pipe 550 is positioned at the upper part of the cold water tank 240, cold water used in the cooling crystallization process can circulate to the hot water tank 230 through the first water outlet pipe 520, the second water pump 310 and the cold water inlet pipe 550, the cold water is recycled, and a second cold water valve 242 is arranged on the cold water inlet pipe 550 and used for controlling the recovery processing of the cold water.
Example 4
Referring to fig. 5, the basic contents of this embodiment are the same as embodiment 1, except that: an inlet bulge 203 is arranged at the end part of the heat exchange tank top wall 201 close to the water inlet 210, and the height of the inlet bulge 203 is higher than that of the water inlet 210; an outlet bulge 204 is arranged at the end part of the heat exchange tank top wall 201 close to the water outlet 220, and the height of the outlet bulge 204 is higher than that of the water outlet 220; it is worth mentioning that: air bubbles brought in by the first water pump 300 can be gathered in the inlet protrusion 203, and the air bubbles are prevented from being attached to the lower portion of the metal plate 110; after the bubbles wiped by the bubble brush 140 are separated from the metal plate 110, the bubbles are collected in the outlet protrusion 204 under the driving of hot water or cold water, so that the bubbles are prevented from being attached to the bottom of the metal plate 110 again to influence the cooling or heating effect of the metal plate 110; the present embodiment improves the cooling effect of the cold water on the metal plate 110 and the heating effect of the hot water on the metal plate 110.
Example 5
Referring to fig. 6, the basic contents of this embodiment are the same as those of embodiment 1, except that: the vent pipe 533 is disposed at an end of the top wall 201 of the heat exchange tank, specifically, one end of the top wall 201 close to the water outlet 220 is connected to the vent pipe 533, and the vent pipe 533 is provided with a vent valve 235.
In this embodiment, when the first water pump 300 pumps water into the heat exchange tank 200, bubbles are brought into the heat exchange tank 200, the bubbles are attached to the inner wall of the top wall 201 of the heat exchange tank and the metal plate 110, and the bubbles are separated from the metal plate 110 under the action of the bubble brush 140; under the drive of hot water or cold water, some bubbles flow out from the water outlet 220 along with water flow, and other bubbles move along the length direction of the heat exchange tank top wall 201, gather at one end of the heat exchange tank top wall 201, and the end is close to the water outlet 220. When bubbles are collected at the end part, the vent pipe 533 can be communicated with the heat exchange tank 200 by opening the vent valve 235, and the bubbles collected at the end part of the top wall 201 of the heat exchange tank can flow out along with water flowing through the vent pipe 533; the vent valve 235 is opened and closed in a circulating manner, so that bubbles brought into the heat exchange tank 200 by the first water pump 300 can be discharged in time in the experiment process, no bubbles exist in the heat exchange tank 200, and the experiment effect is improved.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (6)
1. A method for simulating a molten steel solidification process is characterized by comprising the following steps: hot water in the hot water tank (230) enters the heat exchange pool (200) through a pipeline, and the hot water in the heat exchange pool (200) heats the metal plate (110); the heating plate (130) heats and preserves the temperature of the peripheral side wall of the experimental tank (100); pouring the experimental solution into the experimental tank (100), discharging hot water in the heat exchange tank (200), allowing cold water in the cold water tank (240) to enter the heat exchange tank (200) through a pipeline, cooling the metal plate (110) by the cold water in the heat exchange tank (200), crystallizing and separating out the experimental solution on the surface of the metal plate (110), and observing the crystallization process by using an observer (400); before the experimental solution is poured into the experimental tank (100), the temperature of the metal plate (110) and the temperature of the peripheral side wall of the experimental tank (100) are not lower than the temperature of the experimental solution; the method comprises the following steps:
the method comprises the following steps: heating and heat preservation
Heating plates (130) arranged outside the peripheral side walls of the experimental tank (100); hot water in the hot water tank (230) is pumped into the heat exchange pool (200) by the first water pump (300) through a pipeline, and the hot water in the heat exchange pool (200) heats the metal plate (110); the bottom of the experimental tank (100) is provided with a slide rail, the slide rail is positioned at the lower part of the metal plate (110), the bubble brush (140) is installed on the slide rail in a sliding manner, the bubble brush (140) is provided with a servo motor (150), and the servo motor (150) is used for driving the bubble brush (140) to slide in a reciprocating manner along the length direction of the slide rail;
step two: adding the test solution
When the temperature of the metal plate (110) is not lower than the temperature of the experimental solution, pouring the experimental solution into the experimental tank (100);
step three: discharging hot water
Hot water in the heat exchange pool (200) is discharged from a water outlet (220);
step four: simulating the solidification process of molten steel
Cold water in the cold water tank (240) enters the heat exchange pool (200) through a pipeline, the cold water in the heat exchange pool (200) cools the metal plate (110), the experimental solution is crystallized and separated out on the surface of the metal plate (110), and meanwhile, an observer (400) is used for observing the crystallization process.
2. The method for simulating a molten steel solidification process according to claim 1, wherein: the method comprises the following steps: the heating and heat preservation method comprises the following specific steps: heating plates (130) arranged outside the peripheral side walls of the experimental tank (100) are electrically heated, so that the temperature of the peripheral side walls of the experimental tank (100) is not lower than that of the experimental solution; then, opening a first hot water valve (231) and a first water pump (300), closing a first cold water valve (241) and a water outlet valve (221), and opening a vent valve (235); hot water in the hot water tank (230) flows into the heat exchange pool (200) from the water inlet (210) under the pumping action of the first water pump (300), and when the hot water overflows from the vent valve (235), the water outlet valve (221) is opened, and meanwhile, the vent valve (235) is closed; the hot water heats the metal plate (110) during the inflow and outflow of the hot water in the heat exchange tank (200).
3. The method for simulating a molten steel solidification process according to claim 1, wherein: step three: the specific steps of discharging hot water are as follows: the first water pump (300) is closed, then the first hot water valve (231) is closed, and the vent valve (235) is opened to enable the second water inlet pipe (510) to be communicated with the outside; then the drainage valve (234) enables the first water inlet pipe (500) to be communicated with the drainage box (250), part of hot water in the first water inlet pipe (500) is discharged into the drainage box (250), and the hot water in the heat exchange pool (200) is discharged from the water outlet (220).
4. The method for simulating a molten steel solidification process according to claim 1, wherein: step four: the method comprises the following specific steps of simulating the molten steel solidification process: closing the drainage valve (234) and the water outlet valve (221), and opening the first cold water valve (241) to enable the cold water tank (240) to be communicated with the first water inlet pipe (500), and simultaneously opening the first water pump (300); the first water pump (300) pumps cold water in the cold water tank (240) into the heat exchange pool (200), and when cold water overflows from the vent valve (235), the water outlet valve (221) is opened, and meanwhile, the vent valve (235) is closed; the metal plate (110) is continuously cooled in the process that cold water flows in and out of the heat exchange pool (200), the experimental solution is crystallized and precipitated on the surface of the metal plate (110), and meanwhile, the crystallization and precipitation process of the experimental solution is vertically observed by adopting an observer (400).
5. The method for simulating a molten steel solidification process according to claim 1, wherein: the experimental solution is NH4Aqueous Cl solution or Na2S2O3An aqueous solution.
6. The method for simulating a molten steel solidification process according to claim 1, wherein: a method for simulating a molten steel solidification process by using a molten steel solidification simulation device, the molten steel solidification simulation device comprising:
the experimental tank (100) is provided with a metal plate (110) at the bottom of the experimental tank (100), and heating plates (130) are arranged outside the peripheral side walls of the experimental tank (100);
the device comprises a heat exchange pool (200), wherein one end of the heat exchange pool (200) is provided with a water inlet (210), the other end of the heat exchange pool (200) is provided with a water outlet (220), an experiment pool (100) is arranged on the heat exchange pool (200), and a metal plate (110) separates the heat exchange pool (200) from the experiment pool (100);
a viewer (400), wherein the viewer (400) is arranged above the experiment pool (100);
the water supply unit comprises a hot water tank (230) and a cold water tank (240), wherein a hot water outlet pipe (540) of the hot water tank (230) is connected with a water inlet (210) through a pipeline, a first hot water valve (231) is installed on the hot water outlet pipe (540), a cold water outlet pipe (560) of the cold water tank (240) is connected with the water inlet (210) through a pipeline, and a first cold water valve (241) is installed on the cold water outlet pipe (560).
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