CN109136587A - Molten aluminum degasification is for pneumatic control method, device, system and computer storage medium - Google Patents
Molten aluminum degasification is for pneumatic control method, device, system and computer storage medium Download PDFInfo
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- CN109136587A CN109136587A CN201811068997.9A CN201811068997A CN109136587A CN 109136587 A CN109136587 A CN 109136587A CN 201811068997 A CN201811068997 A CN 201811068997A CN 109136587 A CN109136587 A CN 109136587A
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- aluminum liquid
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- inert gas
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 215
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 215
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000007872 degassing Methods 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 title claims description 8
- 239000011261 inert gas Substances 0.000 claims abstract description 87
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000001257 hydrogen Substances 0.000 claims abstract description 82
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 82
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 54
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 203
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 78
- 239000000463 material Substances 0.000 claims description 51
- 229910052757 nitrogen Inorganic materials 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 13
- 238000005485 electric heating Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000013507 mapping Methods 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004615 ingredient Substances 0.000 abstract 2
- 238000006356 dehydrogenation reaction Methods 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum manganese Chemical compound 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The embodiment of the present invention provides a kind of molten aluminum degasification for pneumatic control method, acquires the X-ray issued in molten aluminum by X-ray receiver, carries out spectrum analysis to X-ray, determines the major metal component for including in molten aluminum；The type for needing to be passed through inert gas in the molten aluminum tank is determined according to major metal component；The opening amplitude of proportioning valve is controlled according to the first difference of the hydrogen content in cylindrical container molten aluminum and the standard hydrogen content of setting to control the input quantity of inert gas；Wherein, when the first difference is greater than the first given threshold, control proportioning valve opening becomes larger to increase the input of the inert gas；When the first difference is less than the first given threshold, control proportioning valve opening becomes smaller to reduce the input of inert gas.Method provided in an embodiment of the present invention can obtain the hydrogen content in molten aluminum and determine the ingredient of molten aluminum, and carries out selection and accurate input quantity to inert gas based on hydrogen content and molten aluminum ingredient and automatically control, and dehydrogenation effect is good and can save inert gas.
Description
Technical Field
The invention relates to the field of aluminum liquid degassing, in particular to a method, a device and a system for controlling aluminum liquid degassing and air supply and a computer storage medium.
Background
In the aluminum processing process, the aluminum alloy absorbs hydrogen when in a liquid state, and the hydrogen content of molten aluminum liquid can seriously affect the quality of castings. In the condensation process, as the solubility of hydrogen is reduced, the hydrogen cannot escape from the solution in time, a series of defects such as white spots on the surface of the plate, increase of pinholes, reduction of mechanical properties of the material and the like are caused in the subsequent rolling process, and finally the product is scrapped, so that the degassing treatment of the aluminum liquid is required.
In the scheme adopted at present, firstly, the gas supply amount of inert gas is manually adjusted, so that the gas supply amount is difficult to accurately control, and the situations of incomplete hydrogen removal or inert gas waste are easy to occur; secondly, inert gas can not be selected according to the components in the aluminum liquid, so that the hydrogen removal effect is not optimal.
Disclosure of Invention
In view of the above, the main objective of the embodiments of the present invention is to provide a method, an apparatus, a system and a computer storage medium for degassing control of aluminum liquid, which can automatically and precisely control the type and amount of supplied air.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides an aluminum liquid degassing and gas supply control method, which is applied to an aluminum liquid degassing and gas supply control system, and the system comprises: the device comprises an aluminum liquid tank, a sampler, a controller, a hydrogen measuring device, a component analyzer, a temperature sensor, an ammeter, an inert gas pipe and a proportional valve, wherein the hydrogen measuring device, the component analyzer, the temperature sensor, the ammeter, the inert gas pipe and the proportional valve are connected with the controller;
the hydrogen measuring device comprises a cylindrical container which is horizontally arranged, a material port which is arranged on the wall of the cylindrical container, a material port cover which can be pivotally connected with the material port, a nitrogen valve which is communicated with the cylindrical container and an electric heating wire; the cylindrical container comprises a first end and a second end which are positioned at two ends of the cylindrical container, wherein the first end is sealed by a first metal plate, and the second end is sealed by a second metal plate; the first metal plate and the second metal plate are respectively connected with the anode and the cathode of a constant voltage power supply through leads, wherein the leads are connected with a first switch; the controller controls the opening and closing of the cylindrical container by controlling the opening and closing of the material port cover;
the component analyzer is arranged at the top end of the inner cavity of the aluminum liquid tank; the component analyzer comprises a light-gathering cover and an X-ray receiver, wherein the light-gathering cover is in a bell mouth shape, the X-ray receiver is arranged on the central axis of the bell mouth of the light-gathering cover, and the receiving end of the X-ray receiver is arranged right opposite to the bell mouth;
the electric heating wire is arranged around the outer side of the cylindrical container and is connected with a second switch;
the temperature sensor is arranged in the cylindrical container cavity;
the current meter is arranged around the cylindrical container;
the inert gas pipe is communicated with the proportional valve and sends inert gas into the aluminum liquid;
the method comprises the following steps:
controlling to open the material port cover;
controlling the temperature sensor to acquire a temperature value in the cylindrical container cavity, and controlling the second switch to be switched on by the controller when the temperature value is lower than the minimum value of a first set threshold range; when the temperature value is within a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; and determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid.
Collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; selecting the type of inert gas introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; and when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to be reduced so as to reduce the input of the inert gas.
The system also comprises a rotor motor electrically connected with the controller, and the rotor motor is used for driving a rotor to stir the aluminum liquid in the aluminum liquid tank; the method further comprises the following steps:
controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
The system further comprises a rotating speed sensor, and the rotating speed sensor is connected with the controller; after the controlling the rotation speed of the rotor motor according to the first difference value, the method further includes:
controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
The system also comprises an air supply motor and a starting device, wherein the air supply motor is connected with the controller through the starting device, and before the method is executed, the system also comprises: and sending an air supply starting instruction to the starting device, and controlling the starting device to start the air supply motor according to the air supply starting instruction.
An aluminum liquid degassing and gas supply control system, comprising: the device comprises an aluminum liquid tank, a sampler, a controller, an output module, an input module, a hydrogen measuring device, a component analyzer, a temperature sensor, an ammeter, an inert gas pipe and a proportional valve, wherein the hydrogen measuring device, the component analyzer, the temperature sensor, the ammeter, the inert gas pipe and the proportional valve are connected with the controller;
the hydrogen measuring device comprises a cylindrical container which is horizontally arranged, a material port which is arranged on the wall of the cylindrical container, a material port cover which is pivotally connected with the material port, and a nitrogen valve which is communicated with the cylindrical container; the cylindrical container comprises a first end and a second end which are positioned at two ends of the cylindrical container, wherein the first end is sealed by a first metal plate, and the second end is sealed by a second metal plate; the first metal plate and the second metal plate are respectively connected with the anode and the cathode of a constant voltage power supply through leads, wherein the leads are connected with a first switch; the controller controls the opening and closing of the cylindrical container by controlling the opening and closing of the material port cover;
the component analyzer is arranged at the top end of the inner cavity of the aluminum liquid tank; the component analyzer comprises a light-gathering cover and an X-ray receiver, wherein the light-gathering cover is in a bell mouth shape, the X-ray receiver is arranged on the central axis of the bell mouth of the light-gathering cover, and the receiving end of the X-ray receiver is arranged right opposite to the bell mouth;
the electric heating wire is arranged around the outer side of the cylindrical container and is connected with a second switch; the temperature sensor is arranged in the cylindrical container cavity; the current meter is arranged around the cylindrical container; the inert gas pipe is communicated with the proportional valve and sends inert gas into the aluminum liquid; the hydrogen measuring device and the component analyzer are respectively connected with the input module; the proportional valve is connected with the output module; the controller is respectively connected with the input module and the output module through a data bus; wherein,
the controller is used for receiving the signal of the input module and sending a control signal to the output module;
the controller is further configured to: controlling to open the material port cover; the temperature sensor is controlled to collect the temperature value in the cylindrical container cavity, and when the temperature value is lower than a first set threshold range, the controller controls the second switch to be switched on; when the temperature value is equal to a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; and determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid.
Collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; determining the type of inert gas to be introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to become smaller so as to reduce the input of the inert gas;
the input module is used for acquiring the hydrogen content in the closed container through the hydrogen measuring device; the component analyzer is also used for determining main metal components contained in the aluminum liquid;
and the output module is used for controlling the opening amplitude of the proportional valve.
The system also comprises a rotor motor electrically connected with the controller, and the rotor motor is used for driving a rotor to stir the aluminum liquid in the aluminum liquid tank; the controller is also used for controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
The system further comprises a rotating speed sensor, and the rotating speed sensor is connected with the controller; after controlling the rotation speed of the rotor motor according to the first difference, the controller is further configured to:
controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
Wherein, still include: air supply motor, contactor, breaker; the three-phase power supply input port of the air supply motor is respectively connected with the three-phase electric contact contacts of the contactor and the three-phase electric contact contacts of the circuit breaker in series and connected with a three-phase power supply; and a control coil of the contactor is connected with an auxiliary control switch of the circuit breaker in series and is connected to a digital power output port of the controller.
The output module comprises a frequency converter, and a three-phase power input port of the rotor motor is correspondingly connected with a three-phase output port of the frequency converter respectively; and the three-phase input port of the frequency converter is connected in series with a three-phase power supply through three-phase electric contact contacts of the circuit breaker respectively.
The aluminum liquid degassing and gas supply control device comprises a memory, a processor and a computer program stored in the memory for running, and is characterized in that: when the processor executes the computer program, the aluminum liquid degassing and air supply control method according to any embodiment of the application is realized.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the aluminum liquid degassing and gas supply control method according to any one of the embodiments of the present application.
According to the method and the system for controlling degassing and gas supply of the aluminum liquid, provided by the embodiment of the invention, the X-ray emitted from the aluminum liquid is collected by the X-ray receiver, and the X-ray is subjected to spectral analysis to determine the main metal components contained in the aluminum liquid; determining the type of inert gas to be introduced into the aluminum liquid tank according to the main metal components; controlling the opening amplitude of a proportional valve according to the hydrogen content in the aluminum liquid in the cylindrical container and a first difference value of the set standard hydrogen content to control the input amount of inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be enlarged so as to increase the input of the inert gas; when the first difference is less than the first set threshold, the proportional valve opening is controlled to be smaller to reduce the input of the inert gas. The method provided by the embodiment of the invention can obtain the hydrogen content in the aluminum liquid, determine the components of the aluminum liquid, select the inert gas based on the hydrogen content and the components of the aluminum liquid, automatically control the accurate input quantity, has good hydrogen removal effect and can save the inert gas.
Drawings
FIG. 1 is a schematic structural diagram of a system corresponding to a degassing and gas supply control method for aluminum liquid provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a hydrogen measuring device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light-gathering cover according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a degassing and gas supply control method for aluminum liquid provided by an embodiment of the invention;
fig. 5 is a schematic structural diagram of a speed control circuit according to an embodiment of the present invention;
fig. 6 is a schematic view of an aluminum liquid degassing and gas supply control device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic structural diagram of a system corresponding to the degassing and gas supply control method for aluminum liquid provided by the embodiment of the present invention is shown, where the system includes: the device comprises an aluminum liquid tank, a sampler, a controller 1, a hydrogen measuring device 2 connected with the controller 1, a component analyzer 5, a temperature sensor 3, an ammeter 4, an inert gas pipe and a proportional valve 6;
in one embodiment, the material of the sampler may be any material with a melting point higher than that of the aluminum alloy, and may be adaptively selected according to production conditions and field conditions in practical applications. The predetermined volume of the aluminum liquid can be 1L, 5L or 10L. For example, an iron sampler collects 1L of aluminum liquid from an aluminum liquid container, and moves the 1L of aluminum liquid to a closed container, wherein the closed container is filled with nitrogen; after the 1L of aluminum liquid moves to the closed container, the closed container isolates the inner space from the outer space to form a closed space.
As an embodiment, the temperature sensor 3 may be a bimetal temperature sensor, a glass liquid temperature sensor, a pressure type temperature sensor, a resistance temperature sensor, a thermistor, and a thermocouple, and may also be an optical high temperature sensor, a radiation high temperature sensor, or a colorimetric temperature sensor.
Referring to fig. 2, which is a schematic structural diagram of a hydrogen measuring device according to an embodiment of the present invention, the hydrogen measuring device 2 includes a horizontally disposed cylindrical container 11, a material opening 12 disposed on a wall of the cylindrical container 11, a material opening cover 13 pivotally connected to the material opening 12, a nitrogen valve 14 communicated with the cylindrical container 11, and an electric heating wire 15; the cylindrical vessel 11 comprises a first end and a second end at both ends of the cylindrical vessel 11, the first end being sealed by a first metal plate 16 and the second end being sealed by a second metal plate 17; the first metal plate 16 and the second metal plate 17 are respectively connected with the positive electrode and the negative electrode of a constant voltage power supply through leads, wherein the leads are connected with a first switch 18; the controller 11 controls the opening and closing of the cylindrical container 11 by controlling the opening and closing of the material port cover 13; the electric heating wire 15 is arranged around the outer side of the cylindrical container 11, and the electric heating wire 15 is connected with a second switch 19;
as an embodiment, the power supply may be 12V, 36V or 72V; the first metal plate 16 and the second metal plate 17 of the cylindrical container 11 are made of a conductive material having a melting point higher than that of an aluminum alloy. The power supply applies a voltage E to a first metal plate 16 and a second metal plate 17 of the cylindrical container filled with the aluminum liquid to form a loop.
The component analyzer 5 is arranged at the top end of the inner cavity of the aluminum liquid tank; referring to fig. 3, which is a schematic structural diagram of a light-gathering cover according to an embodiment of the present invention, the component analyzer includes a light-gathering cover 22 and an X-ray receiver 21, the light-gathering cover 22 is in a bell mouth shape, the X-ray receiver 21 is disposed on a central axis of the bell mouth of the light-gathering cover 22, and a receiving end of the X-ray receiver 21 is disposed opposite to the bell mouth;
the temperature sensor 3 is arranged in the cavity of the cylindrical container 11;
the current meter 4 is arranged around the cylindrical container 11;
the inert gas pipe is communicated with the proportional valve 6 and sends inert gas into the aluminum liquid;
referring to fig. 4, a schematic flow chart of a method for degassing and controlling air supply of aluminum liquid provided by an embodiment of the present invention is shown, where the method includes:
step S1: controlling to open the material port cover;
step S2: controlling the temperature sensor to acquire a temperature value in the cylindrical container cavity, and controlling the second switch to be switched on by the controller when the temperature value is lower than the minimum value of a first set threshold range; when the temperature value is within a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
step S3: controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
step S4: controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid;
as an embodiment, the current meter 4 may be a ring current meter, a shock current meter or a photoelectric amplification current meter; the ammeter 4 is used for detecting the current I in a loop formed by the power supply and the two metal plates of the cylindrical container filled with the aluminum liquid. And calculating to obtain the conductivity sigma of the aluminum liquid as I/E according to the current, and determining the hydrogen content of the aluminum liquid according to the corresponding relation between the conductivity sigma of the aluminum liquid and the hydrogen content of the aluminum liquid.
Step S5: collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; selecting the type of inert gas introduced into the aluminum liquid tank according to the main metal components;
the molten aluminum composition may be pure aluminum of 1XXX series having an aluminum content of 99.6% or more, aluminum copper of 2XXX series having an aluminum content of 9.26% or more and a copper content of 3% to 5%, aluminum manganese of 3XXX series having an aluminum content of 97% or more and a manganese content of 1% to 1.5%, aluminum silicon of 4XXX series having an aluminum content of 92% or more and a silicon content of 4.5% to 6%, aluminum magnesium of 5XXX series having an aluminum content of 93% or more and a magnesium content of 4% to 5%, aluminum silicon of 6XXX series having an aluminum content of 95% or more and a silicon content of 0.4% to 0.8%, aluminum zinc of 7XXX series having an aluminum content of 90% or more and a zinc content of 5% to 6%, another aluminum alloy of 8XXX series, or a spare aluminum alloy of 9XXX series.
Here, the inert gas may be one or more of nitrogen, argon and carbon tetrachloride, and the corresponding gas supply valve of one or more of nitrogen, argon and carbon tetrachloride is controlled to be opened to supply the corresponding gas according to the composition of the aluminum liquid. For example, when the aluminum liquid is pure aluminum of 1XXX series, the nitrogen supply valve is controlled to be communicated to supply nitrogen corresponding to inert gas nitrogen; for example, when the aluminum liquid is aluminum copper of 2XXX series, the controller controls the connection of an argon supply valve corresponding to the inert gas argon to supply argon; for another example, when the aluminum liquid component is 3XXX series aluminum manganese, the controller controls the connection of the nitrogen supply valve to supply nitrogen, and controls the connection of the carbon tetrachloride supply valve to supply carbon tetrachloride corresponding to the mixture of inert gas nitrogen and carbon tetrachloride. In practical application, the specific corresponding relationship between the components of the aluminum liquid and the inert gas is determined by the corresponding production process, which is not limited in the embodiment of the invention.
Step S6: controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; and when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to be reduced so as to reduce the input of the inert gas.
As one embodiment, when the output of the inert gas needs to be increased, a control signal is output, wherein the control signal can be a voltage signal of 0-10V or a current signal of 4-20mA, and the opening of the proportional valve for outputting the inert gas is controlled to be increased. Wherein, if the control signal is a voltage signal of 0-10V, it can be 0V corresponding to the proportional valve opening degree (i.e. closed), 50% 5V corresponding to the proportional valve opening degree, 100% 10V corresponding to the proportional valve opening degree (i.e. fully open, at this time, the output flow of the inert gas reaches the maximum), or 100% 0V corresponding to the proportional valve opening degree (i.e. fully open, at this time, the output flow of the inert gas reaches the maximum), 50% 5V corresponding to the proportional valve opening degree, 0% 10V corresponding to the proportional valve opening degree; if the first control signal is a current signal of 4-20mA, the first control signal may be a current signal of 4mA corresponding to the proportional valve opening degree of 0%, 12mA corresponding to the proportional valve opening degree of 50%, 20mA corresponding to the proportional valve opening degree of 100%, or 4mA corresponding to the proportional valve opening degree of 100%, 12mA corresponding to the proportional valve opening degree of 50%, 20mA corresponding to the proportional valve opening degree of 0%. The opening of the proportional valve for controlling the output inert gas to be larger can be as follows: if the opening degree of the proportional valve is 20% at this time, the opening degree of the proportional valve is controlled to be increased to 25%, 30%, 50%, or the like so as to increase the output flow rate of the inert gas.
According to the method and the system for controlling degassing and gas supply of the aluminum liquid, provided by the embodiment of the invention, the X-ray emitted from the aluminum liquid is collected by the X-ray receiver, and the X-ray is subjected to spectral analysis to determine the main metal components contained in the aluminum liquid; determining the type of inert gas to be introduced into the aluminum liquid tank according to the main metal components; controlling the opening amplitude of a proportional valve according to the hydrogen content in the aluminum liquid in the cylindrical container and a first difference value of the set standard hydrogen content to control the input amount of inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be enlarged so as to increase the input of the inert gas; when the first difference is less than the first set threshold, the proportional valve opening is controlled to be smaller to reduce the input of the inert gas. The method provided by the embodiment of the invention can obtain the hydrogen content in the aluminum liquid, determine the components of the aluminum liquid, select the inert gas based on the hydrogen content and the components of the aluminum liquid, automatically control the accurate input quantity, has good hydrogen removal effect and can save the inert gas.
The system also comprises a rotor motor electrically connected with the controller, and the rotor motor is used for driving a rotor to stir the aluminum liquid in the aluminum liquid tank; the method further comprises the following steps:
controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
The system further comprises a rotating speed sensor, and the rotating speed sensor is connected with the controller; in one embodiment, the rotation speed sensor may be a magnetic sensing type rotation speed sensor, a laser type rotation speed sensor, a magneto-electric type rotation speed sensor, a capacitance type rotation speed sensor, a variable reluctance type rotation speed sensor, or the like.
After the controlling the rotation speed of the rotor motor according to the first difference value, the method further includes:
controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
The system also comprises an air supply motor and a starting device, wherein the air supply motor is connected with the controller through the starting device, and before the method is executed, the system also comprises: and sending an air supply starting instruction to the starting device, and controlling the starting device to start the air supply motor according to the air supply starting instruction.
An aluminum liquid degassing and gas supply control system, comprising: the device comprises an aluminum liquid tank, a sampler, a controller, an output module, an input module, a hydrogen measuring device, a component analyzer, a temperature sensor, an ammeter, an inert gas pipe and a proportional valve, wherein the hydrogen measuring device, the component analyzer, the temperature sensor, the ammeter, the inert gas pipe and the proportional valve are connected with the controller;
the hydrogen measuring device comprises a cylindrical container which is horizontally arranged, a material port which is arranged on the wall of the cylindrical container, a material port cover which is pivotally connected with the material port, and a nitrogen valve which is communicated with the cylindrical container; the cylindrical container comprises a first end and a second end which are positioned at two ends of the cylindrical container, wherein the first end is sealed by a first metal plate, and the second end is sealed by a second metal plate; the first metal plate and the second metal plate are respectively connected with the anode and the cathode of a constant voltage power supply through leads, wherein the leads are connected with a first switch; the controller controls the opening and closing of the cylindrical container by controlling the opening and closing of the material port cover;
the component analyzer is arranged at the top end of the inner cavity of the aluminum liquid tank; the component analyzer comprises a light-gathering cover and an X-ray receiver, wherein the light-gathering cover is in a bell mouth shape, the X-ray receiver is arranged on the central axis of the bell mouth of the light-gathering cover, and the receiving end of the X-ray receiver is arranged right opposite to the bell mouth;
the electric heating wire is arranged around the outer side of the cylindrical container and is connected with a second switch; the temperature sensor is arranged in the cylindrical container cavity; the current meter is arranged around the cylindrical container; the inert gas pipe is communicated with the proportional valve and sends inert gas into the aluminum liquid; the hydrogen measuring device and the component analyzer are respectively connected with the input module; the proportional valve is connected with the output module; the controller is respectively connected with the input module and the output module through a data bus; wherein,
the controller is used for receiving the signal of the input module and sending a control signal to the output module;
the controller is further configured to: controlling to open the material port cover; the temperature sensor is controlled to collect the temperature value in the cylindrical container cavity, and when the temperature value is lower than a first set threshold range, the controller controls the second switch to be switched on; when the temperature value is equal to a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; and determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid.
Collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; determining the type of inert gas to be introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to become smaller so as to reduce the input of the inert gas;
the input module is used for acquiring the hydrogen content in the closed container through the hydrogen measuring device; the component analyzer is also used for determining main metal components contained in the aluminum liquid;
and the output module is used for controlling the opening amplitude of the proportional valve.
Referring to fig. 5, a schematic structural diagram of a speed control circuit according to an embodiment of the present invention is shown, the system further includes a rotor motor 42 electrically connected to the controller 41, and the rotor motor 42 is configured to drive a rotor to stir aluminum liquid in the aluminum liquid tank; the controller is further configured to control a rotational speed of the rotor motor 42 according to the first difference; when the first difference is greater than a first set threshold, outputting a first control signal to control the rotation speed of the rotor motor 42 to control the current to increase; when the first difference is smaller than or equal to a first set threshold, a second control signal is output to control the rotation speed of the rotor motor 42 to control the current to be constant.
Wherein the system further comprises a rotation speed sensor 43, and the rotation speed sensor 43 is connected with the controller 41; after controlling the rotation speed of the rotor motor 42 according to the first difference, the controller 41 is further configured to:
controlling the sensor 43 to acquire a rotating speed value of the rotor motor 42;
adjusting the rotation speed of the rotor motor 42 according to a second difference value between the rotation speed value of the rotor motor 42 and a rated rotation speed value corresponding to the rotation speed control current of the motor; when the second difference is greater than a second set threshold, outputting a third control signal to control the rotation speed control current of the rotor motor 42 to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor 42 to control the current to increase; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
Wherein, still include: a blowing motor 44, a contactor 45, and a circuit breaker 46; the three-phase power input port of the air supply motor 44 is respectively connected in series with the three-phase electric contact contacts of the contactor 45 and the three-phase electric contact contacts of the circuit breaker 46 and is connected with a three-phase power supply; the control coil 47 of the contactor 45 is connected in series with the auxiliary control switch 48 of the circuit breaker 46 and into the digital power output port of the controller 41.
The output module comprises a frequency converter 49, and a three-phase power input port of the rotor motor 42 is correspondingly connected with a three-phase output port of the frequency converter 49; and the three-phase input port of the frequency converter 49 is connected in series to a three-phase power supply through three-phase electric contact contacts of the circuit breaker 46.
Referring to fig. 6, an apparatus for degassing and controlling air supply of aluminum liquid provided by an embodiment of the present invention includes a memory 51, a processor 52 and a computer program stored in the memory for running, where the processor 52 implements the following steps when executing the computer program: controlling to open the material port cover;
controlling the temperature sensor to acquire a temperature value in the cylindrical container cavity, and controlling the second switch to be switched on by the controller when the temperature value is lower than the minimum value of a first set threshold range; when the temperature value is within a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid;
collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; selecting the type of inert gas introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; and when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to be reduced so as to reduce the input of the inert gas.
Here, the processor 52 is further configured to implement: controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
Here, the processor 52 is further configured to implement: controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
Here, the processor 52 is further configured to implement: and sending an air supply starting instruction to the starting device, and controlling the starting device to start the air supply motor according to the air supply starting instruction.
An embodiment of the present invention provides a computer storage medium, where a computer program is stored on the computer readable storage medium, where the computer program is implemented by a processor to perform the following steps:
controlling to open the material port cover;
controlling the temperature sensor to acquire a temperature value in the cylindrical container cavity, and controlling the second switch to be switched on by the controller when the temperature value is lower than the minimum value of a first set threshold range; when the temperature value is within a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid;
collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; selecting the type of inert gas introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; and when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to be reduced so as to reduce the input of the inert gas.
Here, the processor, when executing the computer program, is further configured to: controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
Here, the processor, when executing the computer program, is further configured to: controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
Here, the processor, when executing the computer program, is further configured to: and sending an air supply starting instruction to the starting device, and controlling the starting device to start the air supply motor according to the air supply starting instruction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.
Claims (11)
1. An aluminum liquid degassing and gas supply control method is applied to an aluminum liquid degassing and gas supply control system, and is characterized in that the system comprises: the device comprises an aluminum liquid tank, a sampler, a controller, a hydrogen measuring device, a component analyzer, a temperature sensor, an ammeter, an inert gas pipe and a proportional valve, wherein the hydrogen measuring device, the component analyzer, the temperature sensor, the ammeter, the inert gas pipe and the proportional valve are connected with the controller;
the hydrogen measuring device comprises a cylindrical container which is horizontally arranged, a material port which is arranged on the wall of the cylindrical container, a material port cover which can be pivotally connected with the material port, a nitrogen valve which is communicated with the cylindrical container and an electric heating wire; the cylindrical container comprises a first end and a second end which are positioned at two ends of the cylindrical container, wherein the first end is sealed by a first metal plate, and the second end is sealed by a second metal plate; the first metal plate and the second metal plate are respectively connected with the anode and the cathode of a constant voltage power supply through leads, wherein the leads are connected with a first switch; the controller controls the opening and closing of the cylindrical container by controlling the opening and closing of the material port cover;
the component analyzer is arranged at the top end of the inner cavity of the aluminum liquid tank; the component analyzer comprises a light-gathering cover and an X-ray receiver, wherein the light-gathering cover is in a bell mouth shape, the X-ray receiver is arranged on the central axis of the bell mouth of the light-gathering cover, and the receiving end of the X-ray receiver is arranged right opposite to the bell mouth;
the electric heating wire is arranged around the outer side of the cylindrical container and is connected with a second switch;
the temperature sensor is arranged in the cylindrical container cavity;
the current meter is arranged around the cylindrical container;
the inert gas pipe is communicated with the proportional valve and sends inert gas into the aluminum liquid;
the method comprises the following steps:
controlling to open the material port cover;
controlling the temperature sensor to acquire a temperature value in the cylindrical container cavity, and controlling the second switch to be switched on by the controller when the temperature value is lower than the minimum value of a first set threshold range; when the temperature value is within a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid;
collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; selecting the type of inert gas introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; and when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to be reduced so as to reduce the input of the inert gas.
2. The method of claim 1, wherein the system further comprises a rotor motor electrically connected to the controller, the rotor motor being configured to drive a rotor to stir the aluminum liquid in the aluminum liquid tank; the method further comprises the following steps:
controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
3. The method of claim 2, wherein the system further comprises a rotational speed sensor coupled to the controller; after the controlling the rotation speed of the rotor motor according to the first difference value, the method further includes:
controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
4. The method of claim 1, wherein the system further comprises a supply air motor and an activation device, the supply air motor being connected to the controller by the activation device, and further comprising, prior to performing the method: and sending an air supply starting instruction to the starting device, and controlling the starting device to start the air supply motor according to the air supply starting instruction.
5. An aluminum liquid degassing and gas supply control system is characterized by comprising: the device comprises an aluminum liquid tank, a sampler, a controller, an output module, an input module, a hydrogen measuring device, a component analyzer, a temperature sensor, an ammeter, an inert gas pipe and a proportional valve, wherein the hydrogen measuring device, the component analyzer, the temperature sensor, the ammeter, the inert gas pipe and the proportional valve are connected with the controller;
the hydrogen measuring device comprises a cylindrical container which is horizontally arranged, a material port which is arranged on the wall of the cylindrical container, a material port cover which is pivotally connected with the material port, and a nitrogen valve which is communicated with the cylindrical container; the cylindrical container comprises a first end and a second end which are positioned at two ends of the cylindrical container, wherein the first end is sealed by a first metal plate, and the second end is sealed by a second metal plate; the first metal plate and the second metal plate are respectively connected with the anode and the cathode of a constant voltage power supply through leads, wherein the leads are connected with a first switch; the controller controls the opening and closing of the cylindrical container by controlling the opening and closing of the material port cover;
the component analyzer is arranged at the top end of the inner cavity of the aluminum liquid tank; the component analyzer comprises a light-gathering cover and an X-ray receiver, wherein the light-gathering cover is in a bell mouth shape, the X-ray receiver is arranged on the central axis of the bell mouth of the light-gathering cover, and the receiving end of the X-ray receiver is arranged right opposite to the bell mouth;
the electric heating wire is arranged around the outer side of the cylindrical container and is connected with a second switch; the temperature sensor is arranged in the cylindrical container cavity; the current meter is arranged around the cylindrical container; the inert gas pipe is communicated with the proportional valve and sends inert gas into the aluminum liquid; the hydrogen measuring device and the component analyzer are respectively connected with the input module; the proportional valve is connected with the output module; the controller is respectively connected with the input module and the output module through a data bus; wherein,
the controller is used for receiving the signal of the input module and sending a control signal to the output module;
the controller is further configured to: controlling to open the material port cover; the temperature sensor is controlled to collect the temperature value in the cylindrical container cavity, and when the temperature value is lower than a first set threshold range, the controller controls the second switch to be switched on; when the temperature value is equal to a first set threshold range, the controller controls a second switch of the heating wire to be switched off; the first set threshold range is a temperature value set for keeping the aluminum liquid in a liquid state;
controlling the nitrogen valve to be opened so as to introduce nitrogen into the cylindrical container and start to calculate time;
after a preset time, controlling the nitrogen valve to close and controlling the sampler to collect a preset volume of aluminum liquid from the aluminum liquid tank and move the aluminum liquid into the cylindrical container through the material port;
controlling to close the material port cover;
controlling the first switch to be closed, and applying constant voltage to the aluminum liquid in the cylindrical container through the lead; detecting the current passing through the aluminum liquid through the galvanometer to determine the conductivity of the aluminum liquid; and determining the hydrogen content in the aluminum liquid in the cylindrical container according to the mapping relation among the electric conductivity, the electric conductivity and the hydrogen content of the aluminum liquid.
Collecting X-rays emitted from the aluminum liquid through the X-ray receiver, and performing spectral analysis on the X-rays to determine main metal components contained in the aluminum liquid; determining the type of inert gas to be introduced into the aluminum liquid tank according to the main metal components;
controlling the opening amplitude of the proportional valve according to a first difference value between the hydrogen content in the aluminum liquid in the cylindrical container and the set standard hydrogen content to control the input amount of the inert gas; when the first difference is larger than a first set threshold, controlling the opening of the proportional valve to be larger so as to increase the input of the inert gas; when the first difference value is smaller than a first set threshold value, controlling the opening of the proportional valve to become smaller so as to reduce the input of the inert gas;
the input module is used for acquiring the hydrogen content in the closed container through the hydrogen measuring device; the component analyzer is also used for determining main metal components contained in the aluminum liquid;
and the output module is used for controlling the opening amplitude of the proportional valve.
6. The system of claim 5, further comprising a rotor motor electrically connected to the controller, the rotor motor being configured to drive a rotor to stir the aluminum liquid in the aluminum liquid tank; the controller is also used for controlling the rotating speed of the rotor motor according to the first difference value; when the first difference is larger than a first set threshold, outputting a first control signal, and controlling the rotation speed of the rotor motor to control the current to be increased; and when the first difference is smaller than or equal to a first set threshold, outputting a second control signal to control the rotation speed of the rotor motor to control the current to be unchanged.
7. The system of claim 6, further comprising a rotational speed sensor coupled to the controller; after controlling the rotation speed of the rotor motor according to the first difference, the controller is further configured to:
controlling the sensor to acquire a rotating speed value of the rotor motor;
adjusting the rotating speed of the rotor motor according to a second difference value of the rotating speed value of the rotor motor and a rated rotating speed value corresponding to the rotating speed control current of the motor; when the second difference is larger than a second set threshold, outputting a third control signal to control the rotation speed of the rotor motor to control the current to be reduced; when the second difference is smaller than a second set threshold, outputting a fourth control signal to control the rotation speed of the rotor motor to control the current to be increased; and when the second difference value is equal to a second set threshold value, outputting a fifth control signal to control the rotating speed of the rotor motor to control the current to be unchanged.
8. The system of claim 5, further comprising: air supply motor, contactor, breaker; the three-phase power supply input port of the air supply motor is respectively connected with the three-phase electric contact contacts of the contactor and the three-phase electric contact contacts of the circuit breaker in series and connected with a three-phase power supply; and a control coil of the contactor is connected with an auxiliary control switch of the circuit breaker in series and is connected to a digital power output port of the controller.
9. The system of claim 6, wherein the output module comprises a frequency converter, and a three-phase power input port of the rotor motor is correspondingly connected with a three-phase output port of the frequency converter; and the three-phase input port of the frequency converter is connected in series with a three-phase power supply through three-phase electric contact contacts of the circuit breaker respectively.
10. The aluminum liquid degassing and gas supply control device comprises a memory, a processor and a computer program stored in the memory for running, and is characterized in that: the processor, when executing the computer program, implements the molten aluminum degassing and gas supply control method as claimed in any one of claims 1 to 4.
11. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the aluminum liquid degassing and air supply control method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068997.9A CN109136587A (en) | 2018-09-13 | 2018-09-13 | Molten aluminum degasification is for pneumatic control method, device, system and computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068997.9A CN109136587A (en) | 2018-09-13 | 2018-09-13 | Molten aluminum degasification is for pneumatic control method, device, system and computer storage medium |
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