CN106337102B - A kind of simulator and analogy method of the experiment of mechanical mixing method desulfurization water model - Google Patents
A kind of simulator and analogy method of the experiment of mechanical mixing method desulfurization water model Download PDFInfo
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- CN106337102B CN106337102B CN201610875377.0A CN201610875377A CN106337102B CN 106337102 B CN106337102 B CN 106337102B CN 201610875377 A CN201610875377 A CN 201610875377A CN 106337102 B CN106337102 B CN 106337102B
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- ladle
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- desulfurization
- lifting platform
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- 238000000034 method Methods 0.000 title claims abstract description 102
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 49
- 230000023556 desulfurization Effects 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000002156 mixing Methods 0.000 title claims abstract description 23
- 238000002474 experimental method Methods 0.000 title claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 claims abstract description 39
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 21
- 238000007654 immersion Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 66
- 238000004088 simulation Methods 0.000 claims description 35
- 238000010907 mechanical stirring Methods 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 15
- 239000002984 plastic foam Substances 0.000 claims description 9
- 239000000700 radioactive tracer Substances 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000003723 Smelting Methods 0.000 abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses the simulators and analogy method of a kind of experiment of mechanical mixing method desulfurization water model, belong to iron and steel smelting technology field.The simulator includes transmission parts, rigid connecting rod, clump weight, stirring-head, power plant, ladle；Analogy method is：It drives hoistable platform to move up and down by transmission parts to change immersion depth of the stirring-head in ladle, the rotating speed that changes stirring-head by power plant in ladle, by changing the size and shape of stirring-head simulate the different process in actual production, the mobility status for inhaling fluid under depth method or mixing time method judgement different experimental conditions is rolled up using desulfurizing agent, finally determines sulfur removal technology parameter best under different working conditions.Actual production is simulated by changes in process parameters using the above method, obtains the best desulfurization parameter under different working conditions, has certain directive significance to production.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a simulation device and a simulation method for a desulfurization water model experiment by a mechanical stirring method.
Background
The mechanical stirring method for desulfurization has a series of advantages of good thermodynamic condition, good kinetic condition, low sulfur content at the end of desulfurization, low desulfurization cost and the like, and is widely applied to the field of pretreatment of molten iron at home and abroad. At present, mechanical stirring desulphurization is the most common molten iron pretreatment desulphurization method for smelting high-quality steel, and mechanical stirring desulphurization is mostly adopted in new steel works and existing steel works at home and abroad for desulphurization modification. The technological parameters of the mechanical stirring desulphurization include the size of a stirring head, the stirring speed, the depth of the stirring head immersed in molten iron, the stirring time and the like, the parameters have great influence on the desulphurization effect, and different technological parameters are adopted according to different molten iron conditions and ladle conditions. At present, most of domestic researches on desulfurization by a mechanical stirring method relate to simple application, and generally, the optimal process parameters are determined by changing different parameter conditions in actual production, so that the efficiency is low, the production is influenced, and unnecessary economic loss is caused.
Disclosure of Invention
The invention aims to provide a simulation device and a simulation method for a desulfurization water model experiment by a mechanical stirring method, and solves the technical problem in the prior art that how to simulate different conditions of actual production and efficiently determine different desulfurization process parameters.
On one hand, in order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a analogue means of mechanical stirring method desulfurization water model experiment, includes:
the transmission component is connected with one side of the lifting platform;
one end of the rigid connecting rod is connected with the other side of the lifting platform;
the balancing weight is connected with the lifting platform, and the balance of the lifting platform is realized by controlling the weight of the balancing weight;
the stirring head is connected with the other end of the rigid connecting rod;
the power device is connected with the rigid connecting rod;
the ladle is arranged below the stirring head, and the stirring head is positioned in the ladle.
Further, the transmission member includes: a rotary screw, a transmission rod and a motor; wherein,
one end of the rotary screw rod is connected with one side of the lifting platform;
one end of the transmission rod is connected with the other end of the rotary screw rod;
the motor is connected with the other end of the transmission rod.
Further, still include: the lifting platform is connected with the frame.
Further, still include: the guide rail sets up in both sides in the frame, lift platform is located in the guide rail, reciprocate along the guide rail.
Further, still include: the base is connected with the bottom of the frame.
On the other hand, the simulation method of the desulfurization water model experiment by the mechanical stirring method is provided, the driving part drives the lifting platform to move up and down to change the immersion depth of the stirring head in the foundry ladle, the power device changes the rotating speed of the stirring head in the foundry ladle, the size and the shape of the stirring head are changed to simulate different processes in actual production, the flow condition of fluid under different experimental conditions is judged by adopting a desulfurizing agent entrainment depth method or a uniform mixing time method, and the optimal desulfurization process parameters under different production conditions are finally determined.
Further, the desulfurizing agent entrainment depth method specifically comprises the following steps: pouring fluid into a ladle to simulate molten iron, placing plastic foam on the surface of the fluid to simulate a desulfurizer, marking the interface of the fluid and the plastic foam as a reference surface, recording the minimum entrainment depth of the plastic foam in the fluid under different experimental conditions, researching the influence on the entrainment depth under different experimental conditions, and determining the optimal desulfurization process parameters.
Further, the reynolds number of the fluid used to simulate the molten iron is the same as the reynolds number of the molten iron.
Further, still include: and marking scale marks on the molten iron ladle.
Further, the blending time method specifically comprises the following steps: after the electrolytic solution is added into the foundry ladle, the pH value or the conductivity of the solution is measured to obtain a change curve of the pH value or the conductivity of the solution along with time, the change condition of the content of the tracer in the foundry ladle is judged according to the curve, the time corresponding to the condition that the curve fluctuation tends to be flat is the blending time, the influence on the blending time under different experimental conditions is researched, and the optimal desulfurization process parameters are determined.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. because the embodiment of the invention utilizes the water model to simulate the production process of desulfurization by a mechanical stirring method, the invention provides a simulation device of a desulfurization water model experiment by a mechanical stirring method, which comprises the following steps: the transmission component is connected with one side of the lifting platform; one end of the rigid connecting rod is connected with the other side of the lifting platform; the balancing weight is connected with the lifting platform, and the balance of the lifting platform is realized by controlling the weight of the balancing weight; the stirring head is connected with the other end of the rigid connecting rod; the power device is connected with the rigid connecting rod; the ladle is arranged below the stirring head, and the stirring head is positioned in the ladle. The driving part drives the lifting platform to move up and down to change the immersion depth of the stirring head in the ladle, the power device changes the rotating speed of the stirring head in the ladle, the size and the shape of the stirring head are changed to simulate different processes of actual production, a desulfurizing agent entrainment depth method or a uniform mixing time method is adopted to judge the flowing condition of fluid under different experimental conditions, and finally the optimal desulfurization process parameters under different production conditions are determined. Therefore, different process conditions of actual production are simulated through the change of experimental parameters, the optimal desulfurization parameters under different production conditions are obtained, and certain guiding significance is provided for production.
2. The embodiment of the invention can simulate the desulfurization production process by a mechanical stirring method by controlling the process parameters, thereby obtaining the optimal desulfurization process parameters such as the size of the stirring head, the stirring speed, the depth of the stirring head immersed in molten iron, the stirring time and the like.
Drawings
Fig. 1 is a schematic structural diagram of a simulation device for a mechanical stirring method desulfurization water model experiment provided by an embodiment of the invention.
In the figure, 1-a rotary screw rod, 2-a lifting platform, 3-a balancing weight, 4-a frame, 5-a transmission rod, 6-a first motor, 7-a second motor, 8-a rigid connecting rod, 9-a stirring head, 10-a ladle and 11-a base.
Detailed Description
The embodiment of the application provides a simulation device and a simulation method for a desulfurization water model experiment by a mechanical stirring method, so that the technical problem of how to simulate different conditions of actual production and efficiently determine different desulfurization process parameters in the prior art is solved; the actual production can be simulated through experimental parameter changes, the optimal desulfurization parameters under different production conditions can be obtained, and certain guiding significance is provided for the production.
In order to solve the above technical problem, the general idea of the technical solution provided in the embodiments of the present application is as follows:
the application provides a analogue means of mechanical stirring method desulfurization water model experiment includes:
the transmission component is connected with one side of the lifting platform;
one end of the rigid connecting rod is connected with the other side of the lifting platform;
the balancing weight is connected with the lifting platform, and the balance of the lifting platform is realized by controlling the weight of the balancing weight;
the stirring head is connected with the other end of the rigid connecting rod;
the power device is connected with the rigid connecting rod;
the ladle is arranged below the stirring head, and the stirring head is positioned in the ladle.
According to the simulation method provided by the embodiment of the application, the transmission part drives the lifting platform to move up and down to change the immersion depth of the stirring head in the ladle, the power device is used for changing the rotating speed of the stirring head in the ladle, the size and the shape of the stirring head are changed to simulate different processes in actual production, and the desulfurizer entrainment depth method is adopted to judge the flowing condition of fluid under different experimental conditions; and (3) judging the flow condition of the fluid under different experimental conditions by adopting a desulfurizing agent entrainment depth method or a uniform mixing time method, and finally determining the optimal desulfurization process parameters under different production conditions.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the detailed description.
A simulation device for a mechanical stirring desulfurization water model experiment is shown in figure 1, and comprises:
the transmission component is connected with one side of the lifting platform 2 and used for controlling the lifting of the lifting platform 2 so as to achieve the effect of controlling the immersion depth change of the stirring head 9 in the ladle 10;
one end of the rigid connecting rod 8 is connected with the other side of the lifting platform 2, and a welding connection mode can be adopted;
the counterweight block 3 is connected with the lifting platform 2, the counterweight block 3 can be hung on the lifting platform 2 through a hook, and when the weight of the stirring head 9 changes due to size change, the balance of the lifting platform 2 is realized by controlling the weight of the counterweight block 3; specifically, the counterweight block 3 can be made of iron blocks;
the stirring head 9 is detachably connected with the other end of the rigid connecting rod 8, and different types of stirring heads in actual production can be simulated by replacing the stirring heads 9 with different shapes and sizes;
the power device is connected with the rigid connecting rod 8; specifically, the power device adopts a second motor 7 connected with a rigid connecting rod 8 to realize a rotating function, so that the effect of changing the rotating speed of the stirring head 9 in the ladle 10 is achieved;
the ladle 10 is arranged below the stirring head 9, and the stirring head 9 is positioned in the ladle 10.
Specifically, the ladle 10 may be made of organic glass, may be scaled down according to the actual size of the ladle, simulates the actual condition of molten iron by the fluid placed therein, and the reynolds number of the fluid used to simulate the molten iron is the same as the reynolds number of the molten iron.
Further, the transmission member includes: a rotary screw 1, a transmission rod 5 and a first motor 6; wherein,
one end of the rotary screw rod 1 is connected with one side of the lifting platform 2, and the rotary screw rod 1 is positioned between the joint of the rigid connecting rod 8 and the lifting platform 2 and the joint of the balancing weight 3 and the lifting platform 2;
one end of the transmission rod 5 is connected with the other end of the rotary screw rod 1;
the first motor 6 is connected with the other end of the transmission rod 5; the first motor 6 controls the rotation of the rotary screw rod 1 through the transmission rod 5, so that the lifting platform 2 moves up and down, and the effect of changing the immersion depth of the stirring head 9 in the ladle 10 is achieved.
Further, still include: the lifting platform 2 is connected with the frame 4, and the lifting platform 2 is arranged in the frame 4.
Further, still include: the guide rails are arranged on two sides in the frame 4, and the lifting platform 2 is positioned in the guide rails and moves up and down along the guide rails, so that the lifting platform 2 can move up and down easily.
Further, still include: and the base 11 is connected with the bottom of the frame 4 and used for supporting the frame 4 and the whole simulation device.
The following description details the simulation method:
the driving part drives the lifting platform 2 to move up and down to change the immersion depth of the stirring head 9 in the ladle 10, the power device changes the rotating speed of the stirring head 9 in the ladle, the size and the shape of the stirring head 9 are changed to simulate different processes in actual production, a desulfurizer entrainment depth method or a uniform mixing time method is adopted to judge the flow conditions of fluid under different experimental conditions, and finally the optimal desulfurization process parameters under different production conditions are determined.
The desulfurizing agent entrainment depth method specifically comprises the following steps: the method adopts the entrainment depth of the desulfurizer under different experimental conditions to judge the flowing condition of the fluid; specifically, before the experiment, scale marks are marked on the ladle 10; then pouring fluid into the ladle 10 to simulate molten iron, placing plastic foam on the surface of the fluid to simulate a desulfurizing agent, marking the interface of the fluid and the plastic foam as a reference surface, recording the minimum entrainment depth of the plastic foam in the fluid under different experimental conditions, wherein the difference between the minimum entrainment depth and the reference surface is the entrainment depth of the desulfurizing agent under the experimental conditions, and the deeper the entrainment depth is, the better the entrainment depth is; and (3) researching the influence on the entrainment depth under different experimental conditions, and determining the optimal immersion depth, stirring speed and stirring head size of the stirring head.
The reynolds number Re, which is the ratio of the inertial force of a fluid to the viscous force, characterizes the fluid flow regime. In order to ensure that the simulation situation is similar to the actual situation, the fluid for simulating molten iron needs to satisfy the following conditions: the reynolds number of the fluid is the same as that of the molten iron. Alternative liquids include, but are not limited to: water, mercury, gasoline, etc. preferably water is used for the simulation because water is easily available, pollution-free, convenient, etc.
The mixing time method specifically comprises the following steps: the method adopts stimulation influence, namely the flow condition of the fluid in the molten pool is detected by a method for detecting the content of the tracer, and in the actual measurement, the change of the content of the tracer is determined by measuring the pH value or the conductivity of the solution so as to measure the blending time. After the electrolyte solution is added into the ladle 10, the conductivity reaches a peak value within a certain time, and a change curve of the conductivity and the time tends to be flat along with the stirring of a stirring head in the ladle 10, which indicates that the electrolyte tends to be uniformly mixed in a molten pool.
Specifically, after an electrolyte solution is added into the ladle 10, the pH value or the conductivity of the solution at different time is measured to obtain a change curve of the pH value or the conductivity of the solution along with time, the change condition of the content of the tracer in the ladle 10 is judged by the curve, the time corresponding to the time when the curve fluctuation tends to be flat is the blending time, the blending time is better when the blending time is shorter, and the time corresponding to the time when the fluctuation of the change curve is lower than 5% in the experiment is defined to represent the blending time. The optimal immersion depth, stirring speed and size of the stirring head are determined by studying the influence on the blending time under different experimental conditions.
According to the above contents, the technological parameters of mechanical stirring desulphurization are researched by adopting a water model method, different conditions of the mechanical stirring desulphurization production process can be simulated by controlling the process parameters of a simulation experiment, the flow conditions of fluids under different experimental conditions are judged by adopting a desulfurizer entrainment depth method or a uniform mixing time method, and the best desulphurization technological parameters such as the size of a stirring head, the stirring speed, the depth of the stirring head immersed in molten iron, the stirring time and the like under different production conditions are finally determined. Therefore, the actual production is simulated through the change of experimental parameters, the optimal desulfurization parameters under different production conditions are obtained, certain guiding significance is provided for the production, and the simulation method is applied to the field actual production, so that a good effect is obtained.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. because the embodiment of the invention utilizes the water model to simulate the production process of desulfurization by a mechanical stirring method, the invention provides a simulation device of a desulfurization water model experiment by a mechanical stirring method, which comprises the following steps: the transmission component is connected with one side of the lifting platform; one end of the rigid connecting rod is connected with the other side of the lifting platform; the balancing weight is connected with the lifting platform, and the balance of the lifting platform is realized by controlling the weight of the balancing weight; the stirring head is connected with the other end of the rigid connecting rod; the power device is connected with the rigid connecting rod; the ladle is arranged below the stirring head, and the stirring head is positioned in the ladle. The driving part drives the lifting platform to move up and down to change the immersion depth of the stirring head in the ladle, the power device changes the rotating speed of the stirring head in the ladle, the size and the shape of the stirring head are changed to simulate actual production, the desulfurizer entrainment depth method or the uniform mixing time method is adopted to judge the flow condition of fluid under different experimental conditions, and finally the optimal desulfurization process parameters under different production conditions are determined. Therefore, different process conditions of actual production are simulated through the change of experimental parameters, the optimal desulfurization parameters under different production conditions are obtained, and certain guiding significance is provided for production.
2. The embodiment of the invention can simulate the desulfurization production process by a mechanical stirring method by controlling the process parameters, thereby obtaining the optimal desulfurization process parameters such as the size of the stirring head, the stirring speed, the depth of the stirring head immersed in molten iron, the stirring time and the like.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. A simulation method of a mechanical stirring desulfurization water model experiment is characterized in that the simulation method is based on a simulation device of the mechanical stirring desulfurization water model experiment, and the simulation device comprises:
the transmission component is connected with one side of the lifting platform;
one end of the rigid connecting rod is connected with the other side of the lifting platform;
the balancing weight is connected with the lifting platform, and the balance of the lifting platform is realized by controlling the weight of the balancing weight;
the stirring head is connected with the other end of the rigid connecting rod;
the power device is connected with the rigid connecting rod;
the ladle is arranged below the stirring head, and the stirring head is positioned in the ladle;
wherein the transmission member includes: a rotary screw, a transmission rod and a motor; wherein,
one end of the rotary screw rod is connected with one side of the lifting platform;
one end of the transmission rod is connected with the other end of the rotary screw rod;
the motor is connected with the other end of the transmission rod;
the simulation method comprises the steps of driving the lifting platform to move up and down through the transmission part to change the immersion depth of the stirring head in the ladle, changing the rotating speed of the stirring head in the ladle through the power device, simulating different processes in actual production by changing the size and the shape of the stirring head, judging the flowing conditions of fluids under different experimental conditions by adopting a desulfurizing agent entrainment depth method or a uniform mixing time method, and finally determining the optimal desulfurization process parameters under different production conditions.
2. The simulation method of the desulfurization water model experiment by the mechanical stirring method as claimed in claim 1, wherein the desulfurization agent entrainment depth method specifically comprises: pouring fluid into a ladle to simulate molten iron, placing plastic foam on the surface of the fluid to simulate a desulfurizer, marking the interface of the fluid and the plastic foam as a reference surface, recording the minimum entrainment depth of the plastic foam in the fluid under different experimental conditions, researching the influence on the entrainment depth under different experimental conditions, and determining the optimal desulfurization process parameters.
3. The simulation method of a model experiment of desulfurized water by mechanical agitation method according to claim 2, wherein the reynolds number of the fluid for simulating molten iron is the same as the reynolds number of the molten iron.
4. The simulation method of desulfurization water model experiment by mechanical agitation method as set forth in claim 2, further comprising: and marking scale marks on the molten iron ladle.
5. The simulation method of the desulfurization water model experiment by the mechanical stirring method according to claim 1, wherein the blending time method specifically comprises: after the electrolytic solution is added into the foundry ladle, the pH value or the conductivity of the solution is measured to obtain a change curve of the pH value or the conductivity of the solution along with time, the change condition of the content of the tracer in the foundry ladle is judged according to the curve, the time corresponding to the condition that the curve fluctuation tends to be flat is the blending time, the influence on the blending time under different experimental conditions is researched, and the optimal desulfurization process parameters are determined.
6. The simulation method of desulfurization water model test by mechanical agitation method as set forth in claim 1, wherein the simulation apparatus further comprises: the lifting platform is connected with the frame.
7. The simulation method of desulfurization water model test by mechanical agitation method according to claim 6, wherein the simulation apparatus further comprises: the guide rail sets up in both sides in the frame, lift platform is located in the guide rail, reciprocate along the guide rail.
8. The simulation method of desulfurization water model test by mechanical agitation method according to claim 6 or 7, wherein the simulation apparatus further comprises: the base is connected with the bottom of the frame.
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