CN114100895A - Carbon electrode cooling and anti-oxidation treatment integrated control system and method - Google Patents
Carbon electrode cooling and anti-oxidation treatment integrated control system and method Download PDFInfo
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- CN114100895A CN114100895A CN202111261536.5A CN202111261536A CN114100895A CN 114100895 A CN114100895 A CN 114100895A CN 202111261536 A CN202111261536 A CN 202111261536A CN 114100895 A CN114100895 A CN 114100895A
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- 238000001816 cooling Methods 0.000 title claims abstract description 101
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000003064 anti-oxidating effect Effects 0.000 title description 20
- 239000011159 matrix material Substances 0.000 claims abstract description 45
- 239000002826 coolant Substances 0.000 claims abstract description 40
- 230000008569 process Effects 0.000 claims abstract description 38
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- AUTNMGCKBXKHNV-UHFFFAOYSA-P diazanium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [NH4+].[NH4+].O1B([O-])OB2OB([O-])OB1O2 AUTNMGCKBXKHNV-UHFFFAOYSA-P 0.000 description 1
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- 238000010079 rubber tapping Methods 0.000 description 1
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- ZMCWFMOZBTXGKI-UHFFFAOYSA-N tritert-butyl borate Chemical compound CC(C)(C)OB(OC(C)(C)C)OC(C)(C)C ZMCWFMOZBTXGKI-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a carbon electrode cooling integrated control system and a formula process which need roasting treatment, wherein a step of water cooling is carried out on a carbon anode which is just discharged from a furnace and has waste heat, a multi-component multi-effect compound capable of improving the oxidation resistance of the carbon anode is added into the traditional cooling water and is sprayed on the carbon anode which is just discharged from the furnace, the reaction property of the multi-component multi-effect compound is increased under the action of the waste heat to form a composite coolant, the surface temperature and the cooling rate of the carbon anode are monitored and collected in real time by establishing a set of integrated cooling system, the identity of the multi-effect compound is dimensionless, a two-dimensional state signal is output, a matrix model is established, the flow of the coolant is digitally controlled by the model, the composite coolant is organically sprayed on the surfaces of the carbon anode by a spraying device, and oxidation resistant films with different thicknesses are coated on the surfaces of the carbon anode according to set requirements. The purposes of improving the cooling efficiency and enhancing the oxidation resistance of the carbon anode are achieved, and a high-efficiency and high-cooperativity integrated control system and process are formed.
Description
Technical Field
The invention relates to a carbon electrode needing roasting treatment, in particular to the field of cooling after a carbon anode for aluminum is discharged from a furnace, and specifically relates to a carbon electrode cooling and anti-oxidation treatment integrated control system and method.
Background
After the carbon anode green body is formed by vibration, cooling treatment is needed, and common cooling modes comprise water cooling, channel cooling, water spray cooling, air cooling or combination cooling of the water cooling, the channel cooling, the water spray cooling and the air cooling. With the development of electrolytic aluminum technology, the shape of the carbon anode is gradually enlarged and can reach 1.4 t/block, researches show that the cooling temperature of the carbon anode is mainly influenced by the cooling time, the influence of different cooling water temperatures and the forming temperature is not greatly different, and the time cost caused in the actual production process is high due to the long cooling time. In the common water cooling technology, the carbon anode is cooled unevenly due to overlarge flow velocity, so that the product property is unstable; not only does this occur when the flow rate is too low, but the cooling time is also prolonged, increasing the cost.
In order to enhance the protective performance of certain products, the surface of the product is sprayed by an effective technical means, and the specific spraying method mainly depends on the type of the selected material, the working condition of the workpiece and the requirement on the coating quality. For example, in the case of ceramic coatings, plasma spraying is preferred; if the coating is a carbide metal ceramic coating, high-speed flame spraying is preferably adopted; if the plastic is sprayed, only flame spraying can be adopted. Spray coating is also a viable technique if the material to be sprayed is liquid, and the choice of spraying method is generally varied and, overall, the spraying effect is achieved in as short a time as possible.
In actual production, in order to improve the oxidation resistance of the carbon anode product, the surface of the anode carbon block is coated, and a layer of protective film is formed on the surface of the anode carbon block by using certain oxidation resistant coating. In order to achieve better adhesion of the oxidation resistant coating to the carbon anode during the coating process, it is sometimes necessary to heat treat the carbon block or oxidation resistant coating to provide specific temperature conditions. A comparison of the cooling process and the anti-oxidation coating process in the production of carbon anodes can be found to be similar, e.g. both by bringing the carbon anode into contact with other substances for physical or chemical reactions, with the difference that the purpose and need for heat balancing in the two processes is different, the former requiring release of heat to the environment and the latter requiring extraction of heat from the environment. Therefore, the applicant considers that the cooling and the anti-oxidation coating treatment process in the carbon anode production can be completely combined to carry out unified management and control, so that the production time can be saved, the heat in the production process can be fully utilized, and the energy can be saved.
Disclosure of Invention
The purpose of the invention is: the carbon electrode cooling and anti-oxidation coating integrated control system and method which need roasting treatment are provided, a step of water cooling of a carbon anode which is just discharged from a furnace and has waste heat is utilized, traditional cooling water is prepared into a composite coolant, and a set of integrated cooling system is established, so that the coolant is organically immersed into the surface of the carbon anode to form anti-oxidation films with different surfaces, the purposes of improving the cooling efficiency and the product quality and enhancing the anti-oxidation property of the carbon anode are achieved, and the integrated control system and the process with high efficiency and high cooperativity are formed.
From the prior patents, the anode carbon block oxidation resistance technology which can be industrially applied at present has two types: one is to use high-temperature aluminum liquid as a coating material, and the other is to use organic resin or sodium hydrofluoride as a binder material to be mixed with alumina powder or cryolite powder to prepare a slurry-like material which is used as an antioxidant protective layer of the anode carbon block. Most of the existing patents need to carry out multiple spraying processes, and are long in time consumption and high in cost. The main adopted in CN202968712U and CN104878411B is alumina, and the coating does not introduce new impurities to the aluminum electrolysis. The coating is uniformly sprayed on the upper surface and the peripheral side surfaces of the anode carbon block, and finally a layer of hard and compact alumina crust surface is formed on the surface of the anode carbon block, so that the aims of reducing anodic oxidation and reducing excessive consumption of the anode are fulfilled. While CN103173790B and CN101386995A use boron compounds, the boron compounds are required to achieve the anti-oxidation effect, the boron content is at least 1000ppm, the cost is high, and a large amount of boron oxide may pollute the produced aluminum. The use of boron oxide under these conditions means that bubbles will form in the coating. If only aluminum fluoride is used for surface treatment, a larger amount of aluminum fluoride is needed to achieve the antioxidation effect, and a large amount of fluorine causes certain pollution to an aluminum oxide tank. The technology of using only alumina as the anti-oxidation layer is not applied to industrial production so far due to the high cost. In view of the above, multi-component formulations are the most economically efficient.
It is known that boron treatment has a significant effect on the air reactivity of the anode samples, untreated samples show high reactivity with mass loss between 14% and 23%, whereas dip-coated samples have mass loss between 4.5% and 9%, with a significant antioxidant effect. Carbon anodes, such as prebaked anodes for aluminum production, are coated by forming a glassy coating of anhydrous boric acid (B203) using ammonium pentaborate or ammonium tetraborate solutions, which coating reduces the reactivity of the anode surface with oxygen. Boron oxide is soluble in water, so that boron oxide can be dipped and coated through an aqueous solution, then boron oxide can be gathered on active sites on the surface of carbon and is molten at high temperature, a thin glass layer can be formed, a certain adsorption force exists between the boron oxide glass layer and the carbon anode, so that the boron oxide glass layer is not easy to fall off, and meanwhile, the boron oxide glass layer can play a role in physically isolating air from the reaction of the carbon anode. According to the defects of the prior art, the silicon series is added, so that the boron content can be reduced while the antioxidation effect is improved. The mechanism of chemical protection of carbon by forming carbon-boron-silicon co-bond on the carbon active center, but the chemical protection is improved, at the same time, the physical barrier isolation effect becomes limited because the anode has a large amount of pores and the boron concentration becomes low, and at this time, a small amount of aluminum fluoride and aluminum oxide are added, which can reduce the air combustion rate by generating oxygen diffusion barrier around the anode and protect the anode to a certain extent, enhancing the physical barrier effect.
When water is used as a solvent, a cationic or anionic surfactant and other catalysts are added in addition to the above-mentioned components, these agents do not contain components which cause unnecessary contamination of the aluminum produced and components which promote carbon oxidation, and these surfactants may be present together with other solubility improvers (e.g., tartaric or citric acid) which improve and accelerate impregnation of the anode under heating. The addition of tri-tert-butyl borate (liquid) easily makes the carbon surface wet at 500 ℃, so that boron oxide dispersed on the carbon structure improves the protection efficiency.
The technical scheme of the invention is as follows:
the utility model provides a carbon electrode cooling and anti-oxidant integrated control system that handles, includes carbon anode and spray set, still includes:
the system comprises a setting module, a control module and a control module, wherein the setting module is used for establishing an initial control model, the initial control model comprises temperature zones and process parameters corresponding to the temperature zones, and the process parameters comprise temperature distribution parameters, pressure parameters and multi-effect coolant flow; the temperature zone is a plurality of independent temperature measurement areas divided on the surface of the carbon anode:
the timing module is used for timing after the new cooling period begins;
the data acquisition module is used for periodically acquiring the temperature of each temperature area, and calculating the cooling rate and the concentration of the sprayed coolant return liquid according to the acquired temperature of each temperature area;
the data processing module is used for carrying out identity non-dimensionalization processing on the temperature, the cooling rate and the return liquid concentration of each temperature zone to obtain a two-dimensional state signal;
the model construction module is used for constructing a matrix control model according to the two-dimensional state signal;
the control module is used for controlling the process parameters by utilizing the initial control model after a new cooling period begins; and the matrix control model is also used for controlling the process parameters of the temperature zone and controlling the concentration of return liquid after the timing module times for a set time.
Furthermore, the setting module is also used for presetting a cooling temperature curve, a curve temperature error range and a cooling speed error range of each temperature zone;
further, the data processing module is specifically configured to perform identity dimensionless processing on the temperatures of the temperature zones according to the curve temperature error ranges and the cooling temperature curves of the temperature zones to obtain temperature zone temperature state signals;
further, the data processing module performs identity non-dimensionalization processing on the cooling rate of the corresponding temperature zone according to the cooling rate error range and the cooling temperature curve of each temperature zone to obtain a cooling rate state signal;
further, the data processing module performs identity dimensionless processing on the detected concentration of the effective action component in the return liquid to obtain a concentration state signal.
Further, the model building module comprises a matrix generating unit for generating an orthogonal matrix according to the two-dimensional state signals of the temperature zone temperature and the cooling rate; a control state determination unit for determining various control states corresponding to the orthogonal matrix; and the functional relation determining unit is used for constructing a functional relation containing control state, priority, pressure and flow parameters according to the control state to obtain a matrix control model.
The invention also provides a using method of the system, which comprises the following steps:
the method comprises the following steps that firstly, after cooling is started, technological parameters are controlled by an initial control model, and the temperature and the return liquid concentration of each temperature zone are periodically collected;
secondly, adjusting the flow of the composite coolant according to the collected temperature of each temperature zone; (ii) a
Thirdly, carrying out identity dimensionless treatment on the temperature, the coolant flow and the return liquid concentration of each temperature zone to obtain a two-dimensional state signal;
fourthly, constructing a matrix control model according to the two-dimensional state signals obtained in the previous step;
fifthly, controlling the coolant flow by using the matrix control model obtained in the fourth step;
and sixthly, adjusting the concentration of the returned liquid through a two-dimensional state signal of the concentration of the returned liquid.
Further, in the fourth step, the following operations are specifically performed: s1, generating an orthogonal matrix according to the two-dimensional state signal; s2, determining various control states of the corresponding orthogonal matrix; and S3, constructing a functional relation including control state, priority, pressure and flow parameter according to the control state to obtain a matrix control model.
The invention also provides a carbon electrode antioxidant treating agent which comprises boron series substances, silicon series substances, aluminum fluoride, alumina sol and an auxiliary agent. Because the tapping temperature of the carbon anode is generally 300 ℃, the anti-oxidation treatment and the composite coolant formed by the anti-oxidation treatment and the composite coolant are put into cooling water, when the composite coolant is sprayed on the surface of the carbon anode, the components of the anti-oxidation treatment agent can enhance the reaction property at the temperature, and are organically sprayed on each surface of the carbon anode in the continuous spraying and cooling process, and anti-oxidation films with different thicknesses are coated on each surface of the carbon anode according to the set requirements.
Preferably, the antioxidant treatment agent is formed by mixing 0.1 to 30 percent of boron series substances, 0.1 to 25 percent of silicon series substances, 0 to 20 percent of aluminum fluoride, 0.1 to 30 percent of alumina sol and less than or equal to 5 percent of auxiliary agents in percentage by mass.
The use method of the carbon electrode antioxidant treating agent comprises the following steps: mixing an antioxidant treating agent into cooling water to form a composite coolant, monitoring the flow of the coolant in real time through the integrated control system, organically spraying the composite coolant on each surface of the carbon anode through a spraying device, and coating antioxidant films with different thicknesses of 0.1-5mm on each surface of the carbon anode according to set requirements.
Furthermore, a circulation loop is arranged in the spraying device, an impurity removal device is arranged in the circulation loop, and impurity removal treatment is carried out on carbon slag taken away from the carbon anode in the spraying process of the coolant, so that the purity of the antioxidant film is ensured.
Furthermore, the spraying device is provided with an adding device for adding an antioxidant treating agent, and the adding device is started to add the antioxidant treating agent through a two-dimensional state signal when the concentration loss exceeds 10% of the set concentration by detecting the concentration of the treating agent in the circulating loop.
The invention has the beneficial effects that:
the invention provides a carbon electrode cooling integrated control system and an anti-oxidation process, through the integrated control system, the flow of the coolant is dynamically adjusted according to the matrix model, so that the cooling speed is controlled in a proper interval, the high-efficiency and high-quality carbon anode product is ensured to meet the performance requirement, and meanwhile, by utilizing the cooling treatment for a long time, adding an antioxidant treatment agent consisting of boron series substances, silicon series substances, aluminum fluoride, alumina sol and an auxiliary agent into the traditional cooling water to form a composite cooling agent, dynamically adjusting the flow rate of the composite cooling agent by combining a control system, in the cooling time range, under the action of pressure and time, the coolant forms an anti-oxidation coating which can be completely covered on the upper surface of the carbon anode, and the coolant uniformly overflows to the periphery after falling to the upper surface of the carbon anode, and the side surfaces of the periphery of the carbon anode are also adhered with the anti-oxidation coating under the action of a certain time. And after the cooling liquid acts on the surface of the carbon anode in the process flow, a large amount of multi-effect coolant still remains in the cooling liquid and flows away, so that the cooling liquid is recycled by arranging a circulating loop, the control system can also monitor the concentration of the returned liquid in real time, the returned liquid is ensured to effectively perform coating work when the returned liquid acts on the carbon anode again, the cost is greatly reduced, and the efficiency is improved.
Drawings
FIG. 1 is a flow chart of an integrated control system in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an integrated control system in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific embodiments, which are not specifically illustrated in the present specification.
Example 1
As shown in fig. 1-2, an integrated control system for carbon electrode cooling and anti-oxidation treatment comprises a spraying device, a setting module, a timing module, a data acquisition module, a data processing module, a model building module and a control module. Considering that the existing cooling process involves parameters such as time, cooling water flow and the like, the time cost is reduced and the oxidation resistance of the anode is effectively improved by fully utilizing the process.
The using process of the embodiment is shown in fig. 1, and comprises the following steps:
step 1, putting the prepared antioxidant treating agent into traditional cooling water to form a composite coolant;
and 2, after a new cooling period is started, controlling the process parameters by using a pre-established initial control model and periodically collecting the temperature and the return liquid concentration of each temperature area.
And the new cooling period means that the previous carbon anode reaches the target cooling temperature, and the carbon anode which is just discharged from the furnace is replaced to carry out a new round of cooling. In a short time after a new period begins, curve temperature and temperature speed data are still in a collecting and analyzing state, an orthogonal matrix and a control instruction are not formed, and in the time, an initial model is used for monitoring process parameters to make transition to a matrix control model;
the initial control model comprises: dividing temperature zones, and obtaining temperature distribution parameters, pressure parameters and multi-effect coolant flow of each temperature zone;
it should be noted that the initial control model may be designed by comprehensively considering the temperature situation of violent pursuit due to poor coupling between the initial temperature and the actual initial temperature of the previous cooling temperature curve design, and aims to correct the phenomenon that the set temperature is violently pursued in a short time after the anode is replaced to damage the carbon anode, and realize the flexible control of cooling;
the time for controlling the process parameters by using the initial control model is set according to actual needs, and after the time period is finished, the control stage of the matrix control model is started. The control stage of the matrix control model is periodically that temperature parameters need to be collected at regular time intervals;
step 3, calculating a cooling rate according to the collected temperatures of the temperature zones, and adjusting the flow of the composite coolant;
step 4, carrying out identity dimensionless treatment on the temperature of each temperature zone, the coolant flow and the return liquid concentration to obtain a two-dimensional state signal;
for the temperature data, the temperature zones can be subjected to identity dimensionless processing according to preset curve temperature error ranges and roasting temperature curves of the temperature zones to obtain temperature state signals, which are respectively: high Temperature (HT), Normal Temperature (NT), and Low Temperature (LT).
For the cooling rate data, the temperature zones can be subjected to identity non-dimensionalization processing according to preset cooling rate error ranges and roasting temperature curves of the temperature zones to obtain cooling rate signals, which are respectively: high Velocity (HV), Normal Velocity (NV), and Low Velocity (LV).
And 5, constructing a matrix control model according to the two-dimensional state signals.
Firstly, an orthogonal matrix is generated according to the two-dimensional state signal, and the format of the orthogonal matrix is shown in the following table:
determining various control states corresponding to the orthogonal matrix, wherein the number of the control states is 9, and constructing a function relation including control states, priorities, pressures and flow parameters according to the vacant states to obtain a matrix control model.
And 6, controlling the process parameters of the temperature zone by using the matrix control model after the set time is reached.
For the carbon anodes described previously, a matrix control model as shown in table 2 below was assumed.
The process of the method for integrating oxidation resistance and cooling of the carbon anode is further explained below, the collected variables are the temperature and the cooling rate of each temperature zone of the carbon anode, and the controlled variables are the pressure parameters and the coolant flow corresponding to each temperature zone. The control process is as follows:
1) replacing the carbon anode just discharged from the furnace, entering a new cooling period and being in an initial default control stage state;
2) dividing a cuboid carbon block of 80mm by 50mm (length by width by height) into eight cubes of 40mm by 25mm, and numbering as TA 1-8;
3) under default control conditions, the initial temperature state is 300 ℃, the pressure state is 0pa, the coolant flow is 0kg/s, and the phase lasts for 10 minutes;
4) after 10 minutes, entering a matrix control stage, and calculating the pressure change and the time and the coolant flow and the time as follows:
assuming that the temperature and the cooling rate of TA1 are in HVHT state, the temperature and the speed are both high, belonging to priority control level 1, and the control logic is: the cooling water flow of the corresponding spray pipeline of TA1 is reduced. According to the control model algorithm, the TA1 flow change is calculated as: 0+20 × 0.8=16kg/s, the time for which the flow rate was adjusted from 20kg/s to 16kg/s was calculated as: 4 x 0.4=1.6 s. If the temperature and cooling rate of TA1 are in NVNT state, the flow rate is maintained.
And repeating the steps until the cooling requirement is met, and replacing the carbon anode to enter the next cooling period.
The structural block diagram of the carbon electrode oxidation resistance and cooling integrated control system in the embodiment is shown in fig. 2. The system comprises the following modules: the system comprises a setting module 100, a control module 101, a timing module 102, a data acquisition module 103, a data processing module 104 and a model building module 105, wherein:
a setting module 100 for establishing an initial control model;
a control module 101, configured to control a process parameter by using the initial control model after a new cooling cycle is started;
a timing module 102, configured to time after a new cooling cycle begins;
and the data acquisition module 103 is used for periodically acquiring the temperature of each temperature zone, calculating the cooling rate according to the acquired temperature of each temperature zone, and calculating the concentration and the temperature of the sprayed coolant return liquid.
The data processing module 104 is used for carrying out identity dimensionless processing on the temperature of each temperature zone, the cooling rate, the return liquid concentration and the temperature to obtain a two-dimensional state signal;
the model building module 105 is used for building a matrix control model according to the two-dimensional state signals of the temperature and the cooling rate;
the control module is further used for controlling the process parameters of the temperature zone and controlling the concentration and the temperature of the return liquid by using the matrix control model after the timing module times for a set time.
It should be noted that, the time for the control module 101 to control the process parameters of each temperature zone by using the initial control model needs to be set as required. After a certain time, entering a control stage of a matrix control model, that is, the control module 101 controls the process parameters of the furnace chamber by using the matrix control model constructed by the model construction module 105.
In the embodiment of the present invention, the setting module 100 is further configured to preset a cooling temperature curve, a curve temperature error range of each temperature zone, and a cooling speed error range.
Correspondingly, the data processing module 104 can perform identity dimensionless processing on the temperature of the temperature zones according to the curve temperature error range and the cooling temperature curve of each temperature zone to obtain temperature status signals; and carrying out identical non-quantitative toughening treatment on the cooling rate of each temperature zone according to the cooling rate error range and the cooling curve of each temperature zone to obtain a rate state signal. The dimensionless processing of the temperature data and the cooling rate data is described in detail above and will not be described herein.
In this embodiment of the present invention, the model building module 105 builds a matrix control model according to the two-dimensional state signal, and the model building module 105 specifically includes the following units:
the matrix generating unit is used for generating an orthogonal matrix according to the two-dimensional state signals of the temperature zone temperature and the cooling rate;
a control state determination unit for determining various control states corresponding to the orthogonal matrix;
and the functional relation determining unit is used for constructing a functional relation containing control state, priority, pressure and flow parameters according to the control state to obtain a matrix control model.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention and the above-described drawings, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The present invention has been described in detail with reference to the embodiments, and the description of the embodiments is provided to facilitate the understanding of the method and apparatus of the present invention, and is intended to be a part of the embodiments of the present invention rather than the whole embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention, and the content of the present description shall not be construed as limiting the present invention. Therefore, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a carbon electrode cooling and anti-oxidant processing integration control system, includes carbon anode and spray set, its characterized in that, the system includes:
the system comprises a setting module, a control module and a control module, wherein the setting module is used for establishing an initial control model, the initial control model comprises temperature zones and process parameters corresponding to the temperature zones, and the process parameters comprise temperature distribution parameters, pressure parameters and multi-effect coolant flow; the temperature zone is a plurality of independent temperature measurement areas divided on the surface of the carbon anode:
the timing module is used for timing after the new cooling period begins;
the data acquisition module is used for periodically acquiring the temperature of each temperature area, and calculating the cooling rate and the concentration of the sprayed coolant return liquid according to the acquired temperature of each temperature area;
the data processing module is used for carrying out identity non-dimensionalization processing on the temperature, the cooling rate and the return liquid concentration of each temperature zone to obtain a two-dimensional state signal;
the model construction module is used for constructing a matrix control model according to the two-dimensional state signal;
the control module is used for controlling the process parameters by utilizing the initial control model after a new cooling period begins; and the matrix control model is also used for controlling the process parameters of the temperature zone and controlling the concentration of return liquid after the timing module times for a set time.
2. The integrated control system for carbon electrode cooling and oxidation resistance treatment according to claim 1, wherein:
the setting module is also used for presetting a cooling temperature curve, a curve temperature error range and a cooling speed error range of each temperature zone; the data processing module is specifically used for carrying out identity dimensionless processing on the temperature of the temperature zones according to the curve temperature error ranges and the cooling temperature curves of the temperature zones to obtain temperature zone temperature state signals; carrying out identity non-dimensionalization processing on the cooling rate of the corresponding temperature zone according to the cooling rate error range and the cooling temperature curve of each temperature zone to obtain a cooling rate state signal; and carrying out identity dimensionless treatment on the detected concentration of the effective action component in the returned liquid to obtain a concentration state signal.
3. The integrated control system for cooling and anti-oxidant treatment of carbon electrode according to any one of claims 1 to 3, wherein said model building module comprises: the matrix generating unit is used for generating an orthogonal matrix according to the two-dimensional state signals of the temperature zone temperature and the cooling rate; a control state determination unit for determining various control states corresponding to the orthogonal matrix; and the functional relation determining unit is used for constructing a functional relation containing control state, priority, pressure and flow parameters according to the control state to obtain a matrix control model.
4. A method of using the integrated control system of claim 3, comprising the steps of:
the method comprises the following steps that firstly, after cooling is started, technological parameters are controlled by an initial control model, and the temperature of each temperature zone, the concentration of returned liquid and the temperature are periodically collected;
secondly, adjusting the flow of the composite coolant according to the collected temperature of each temperature zone; (ii) a
Thirdly, carrying out identity dimensionless treatment on the temperature, the coolant flow and the return liquid concentration of each temperature zone to obtain a two-dimensional state signal;
fourthly, constructing a matrix control model according to the two-dimensional state signals obtained in the previous step;
fifthly, controlling the coolant flow by using the matrix control model obtained in the fourth step;
and sixthly, adjusting the concentration of the returned liquid through a two-dimensional state signal of the concentration of the returned liquid.
5. The use method according to claim 4, wherein in the fourth step, the following operations are specifically performed: s1, generating an orthogonal matrix according to the two-dimensional state signal; s2, determining various control states of the corresponding orthogonal matrix; and S3, constructing a functional relation including control state, priority, pressure and flow parameter according to the control state to obtain a matrix control model.
6. A carbon electrode antioxidant treatment agent for use in the integrated control system as claimed in claims 1 to 4, characterized by comprising, in mass fraction
0.1-30 wt% of boron series,
0.1-25 wt% of a silicon-based compound,
0-20 wt% of aluminium fluoride
0.1 to 30% by weight of an alumina sol,
not more than 5wt% of an auxiliary agent.
7. The process for using the carbon electrode antioxidant treating agent as claimed in claim 6, wherein the treating agent is mixed into cooling water to form a composite coolant for prebaked anodes requiring cooling, and the carbon anodes just taken out of the furnace are generally 300 ℃; the cooling process is utilized, the flow of the coolant is monitored in real time through a control system, the composite coolant is organically sprayed on the surface of the carbon anode through a spraying device, and different surfaces of the carbon anode are coated with 0.1-5mm of antioxidant films according to the set requirement.
8. The process for applying the carbon electrode antioxidant treating agent as set forth in claim 7, wherein: the spraying device is provided with a circulating loop, and the impurity removing device is arranged in the circulating loop to remove impurities from carbon slag taken away from the carbon anode in the spraying process of the coolant, so that the purity of the antioxidant film is ensured.
9. The application process of the carbon electrode antioxidant treating agent as claimed in claim 8, wherein the spraying device is provided with an adding device for adding the antioxidant treating agent, and the adding device is started to add the antioxidant treating agent by a two-dimensional state signal when the concentration loss exceeds 10% of the set concentration by detecting the concentration of the treating agent in the circulation loop.
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Effective date of registration: 20231203 Address after: No. 86 Kaikai Road, Huairou District, Beijing, 101400 Patentee after: Huang Zhiqi Address before: Room 2701, building 1, yanchuanshan ecological park, No. 35, Meilin street, Yuhua District, Changsha City, Hunan Province, 410011 Patentee before: Hunan Guofa Holding Co.,Ltd. |