CN115740049B - Silicon steel cold continuous rolling lubrication system and method - Google Patents
Silicon steel cold continuous rolling lubrication system and method Download PDFInfo
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- CN115740049B CN115740049B CN202211437574.6A CN202211437574A CN115740049B CN 115740049 B CN115740049 B CN 115740049B CN 202211437574 A CN202211437574 A CN 202211437574A CN 115740049 B CN115740049 B CN 115740049B
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 60
- 238000005096 rolling process Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005461 lubrication Methods 0.000 title claims description 26
- 239000000839 emulsion Substances 0.000 claims abstract description 129
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 239000007921 spray Substances 0.000 claims abstract description 68
- 238000005507 spraying Methods 0.000 claims abstract description 39
- 230000001050 lubricating effect Effects 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 60
- 239000003921 oil Substances 0.000 claims description 49
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 239000012530 fluid Substances 0.000 description 11
- 239000010731 rolling oil Substances 0.000 description 9
- 230000005291 magnetic effect Effects 0.000 description 7
- 238000001802 infusion Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000011033 desalting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Metal Rolling (AREA)
Abstract
The invention discloses a lubricating system and a lubricating method for cold continuous rolling of silicon steel, which solve the technical problem that the conventional lubricating system cannot meet the lubricating production of cold continuous rolling of multi-grade silicon steel. The lubricating system comprises a rack, a low-concentration emulsion circulating unit, a medium-concentration emulsion circulating unit and a high-concentration emulsion spraying unit, and can select emulsion with different concentrations to spray on the selected rack or/and strip steel, so that when rolling different products, the lubricating system can be suitable for rolling and lubricating, and one or two or three lubricating systems of the low-concentration emulsion circulating unit, the medium-concentration emulsion circulating unit and the high-concentration emulsion spraying unit can be used for spraying and combining, thereby enabling the lubricating systems to meet the lubricating requirements of rolling of various grades of silicon steel.
Description
Technical Field
The invention relates to the technical field of cold continuous rolling steel, in particular to a lubricating system and a lubricating method for cold continuous rolling of silicon steel.
Background
With the demands of energy conservation and high efficiency of steel production, more and more cold rolling mills are not used for independently producing certain grade silicon steel products. The emulsion with different concentrations is used for lubricating and cooling in the production of silicon steel products with different brands, thereby ensuring the rapid production of the silicon steel.
The existing cold continuous rolling mill for silicon steel can generally only meet the production of one or a few grades of silicon steel, and cannot meet the defect of meeting the proper lubrication requirement on each grade of silicon steel.
Disclosure of Invention
The invention aims to provide a lubricating system and a lubricating method for cold continuous rolling of silicon steel, which are used for solving the technical problem that the lubricating system of the cold continuous rolling mill in the background art can not meet the lubricating requirements of various grades of silicon steel to at least a certain extent.
In order to achieve the above purpose, the present invention provides the following technical solutions: a lubrication system for cold continuous rolling of silicon steel comprises
The cold continuous rolling mill comprises six groups of racks which are sequentially connected in series along a production line, and a single group of racks is internally provided with a roller system for driving strip steel to run;
a low concentration emulsion circulation unit provided with a first output end which can act on a roller system of the rack positioned at the tail end;
the medium-concentration emulsion circulating unit is provided with a second output end which can act on the roller system of each rack and the running strip steel;
and the high-concentration emulsion injection unit is provided with a third output end which can act on the running strip steel.
Further, the low concentration emulsion circulation unit includes a first collection piece, a first oil return tank, a first clean oil tank and a plurality of first nozzles that communicate through the infusion pipeline in proper order, first nozzle is configured as first output, a first collection piece sets up in the terminal frame below.
Further, the medium concentration emulsion circulating unit comprises a second collecting piece, a second oil return tank, a second clean oil tank and a plurality of second nozzles which are communicated sequentially through an infusion pipeline; the second nozzle is configured as the second output end, and the second collecting member is disposed below each of the racks.
Further, the high-concentration emulsion injection unit comprises a third clean oil tank and a third nozzle which are communicated through an infusion pipeline, and the third nozzle is configured as the two output ends.
Further, the roller system comprises two pairs of supporting rollers, two pairs of middle rollers and two pairs of working rollers, wherein the two pairs of working rollers are arranged between the two pairs of middle rollers, and the two pairs of middle rollers are arranged between the two pairs of supporting rollers; and driving the working roller to rotate, and sequentially carrying the intermediate roller and the supporting roller to rotate.
Further, a squeeze roller is arranged on the strip steel running between the adjacent frames, and the squeeze roller is positioned between the second nozzle and the third nozzle for running the strip steel.
A method of lubricating a cold continuous rolling of silicon steel, the method being based on a lubrication system, the method comprising:
when the middle-low grade silicon steel is produced, controlling the first output end of the low concentration circulating unit to spray liquid to the roller system of the machine frame at the tail end, and controlling the second output end of the middle concentration circulating unit to spray liquid to the roller systems of other machine frames and the running strip steel;
when high-grade silicon steel is produced, controlling the second output end of the medium concentration circulating unit to spray liquid to all roller systems of the frame and the running strip steel;
when the ultra-high grade silicon steel is produced, the second output end of the medium concentration circulation unit is controlled to spray the liquid to the roller systems of the frames and the running strip steel, and the third output end of the high concentration emulsion injection unit is controlled to spray the liquid to the running strip steel.
Further, in the production of medium-grade and low-grade silicon steel, the roller system spray liquid of the frame from the first output end of the low-concentration circulation unit to the tail end is controlled, and the roller system spray liquid of the second output end of the medium-concentration circulation unit to other frames and the running strip steel spray liquid are controlled, which specifically comprises:
the concentration of the low-concentration emulsion output by the first output end of the low-concentration circulation unit is 1.0% -3.0%, the injection rate of the low-concentration emulsion is 4000-8000 liters/min, and the injection pressure is 0.7-0.9MPa;
the concentration of the low-concentration emulsion output by the second output end of the medium-concentration circulation unit is 3.0% -5.0%, the spraying rate of the medium-concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
Further, when producing high grade silicon steel, controlling the second output end of the medium concentration circulation unit to spray liquid to all roller systems of the frame and the running strip steel, specifically comprising:
the concentration of the low-concentration emulsion output by the second output end of the medium-concentration circulation unit is 3.0% -5.0%, the spraying rate of the medium-concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
Further, when producing the ultra-high grade silicon steel, controlling the second output end of the medium concentration circulation unit to spray the liquid to the roller system of each frame and the running strip steel, and controlling the third output end of the high concentration emulsion injection unit to spray the liquid to the running strip steel, comprising the following steps:
the concentration of the low-concentration emulsion output by the second output end of the medium-concentration circulation unit is 3.0% -5.0%, the injection rate of the medium-concentration emulsion is 24000-48000 liters/min, and the injection pressure is 0.5-0.9MPa;
the concentration of the high-concentration emulsion output by the third output end of the high-concentration spraying unit is 10% -20%, the spraying rate of the high-concentration emulsion is 10-240 liters/min, and the spraying pressure is 0.7-0.9MPa.
Compared with the prior art, the invention has the beneficial effects that:
because 3 sets of lubricating systems and methods are arranged in the cold continuous rolling mill and are respectively a low-concentration emulsion circulating unit, a medium-concentration emulsion circulating unit and a high-concentration emulsion spraying unit, emulsion with different concentrations can be selected to be sprayed onto a selected frame or/and strip steel, when rolling silicon steel products with different grades, the corresponding lubricating systems can be selected to conduct rolling lubrication, and one or two or three lubricating systems of the low-concentration emulsion circulating unit, the medium-concentration emulsion circulating unit and the high-concentration emulsion spraying unit can be used for spraying and combining, so that the lubricating systems can meet the lubricating requirements of rolling silicon steel with various grades.
Drawings
FIG. 1 is an overall schematic of a lubrication system of the present invention;
FIG. 2 is a schematic diagram of emulsion injection for rolling medium and low grade non-oriented silicon steel by the lubrication system of the present invention;
FIG. 3 is a schematic view of emulsion spray for rolling high grade non-oriented silicon steel by the lubrication system of the present invention;
FIG. 4 is a schematic diagram of emulsion spray for rolling ultra-high grade non-oriented silicon steel by the lubrication system of the present invention.
In the figure:
1. a frame; 100. a support roller; 101. an intermediate roller; 102. a work roll;
21. a first collection member; 22. a first oil return tank; 23. a first clean oil tank; 24. a first flat bed filter;
41. a second collection member; 42. a second oil return tank; 43. a second clean oil tank; 44. a magnetic filter; 45. a second flat bed filter;
51. a third clean oil tank;
8. a squeeze roll;
9. a stirrer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Silicon steel is an iron-silicon alloy with silicon content of 0.5% -4.5%, and is a soft magnetic material widely used in the field of electrician. According to the difference of silicon content and magnetic properties of finished products, silicon steel is divided into medium-low grade silicon steel (0.5% -2.1%), high grade silicon steel (2.2% -3.2%) and ultra-high grade silicon steel (3.3% -4.5%). The silicon steel has different deformation resistance and strength. When the low-silicon steel is produced by a cold continuous rolling mill, if the high-concentration emulsion of the high-grade silicon steel is adopted, the problem of lubrication slipping occurs, so that the emulsion can be adjusted to a low-concentration emulsion. Also, for high silicon products, due to the substantial increase in the material properties and strength levels of the steel grades, large and high rolling forces are encountered for such grades in conventional cold continuous rolling production processes; therefore, in a cold continuous rolling unit, the emulsion with higher concentration is generally adopted to ensure the lubrication effect of rolling; however, for ultra-high silicon steel, the material characteristics and the strength increase are larger, the steel grade can be subjected to the difficulty that the rolling force is rapidly increased in the cold continuous rolling production process, so that the steel grade cannot be thinned, and at the moment, the ideal lubricating effect is difficult to bring even if the concentration of emulsion is increased.
Therefore, in order to enable the cold continuous rolling mill unit to produce all grades of silicon steel, the applicant designs a silicon steel cold continuous rolling lubrication system which comprises:
the cold continuous rolling mill comprises six groups of racks 1 which are sequentially connected in series along a production line, and for convenience of explanation, the racks 1 in the technical scheme are sequentially No. 1-6 racks 1 along the production line. A roller system for driving strip steel to run is arranged in the single-group frame 1; the roller system comprises two pairs of supporting rollers 100, two pairs of middle rollers 101 and two pairs of working rollers 102, wherein the two pairs of working rollers 102 are arranged between the two pairs of middle rollers 101, and the two pairs of middle rollers 101 are arranged between the two pairs of supporting rollers 100; the work roll 102 is driven to rotate, and the intermediate roll 101 and the backup roll 100 are sequentially driven to rotate.
The low-concentration emulsion circulating unit is provided with a first output end which can act on a roller system positioned on a No. 6 rack; the low concentration emulsion circulation unit includes a first collecting member 21, a first oil return tank 22, a first clean oil tank 23 and a plurality of first nozzles which are sequentially communicated through an infusion pipe, the first nozzles are configured as a first output end, and the first collecting member 21 is disposed below the terminal frame 1. And a liquid stop valve is arranged on each first nozzle and used for controlling whether each first nozzle sprays liquid or not. A first jet pump for supplying jet pressure is provided on the fluid line through which the first clean tank 23 communicates with the first nozzle, and a first fluid return pump for returning fluid power is provided on the fluid line between the first collecting member 21 and the first fluid return tank 22. A first flat bed filter 24 for purifying the emulsion is also arranged between the first return tank 22 and the first clean tank 23.
The medium-concentration emulsion circulating unit is provided with a second output end which can act on the roller system of each rack 1 and the running strip steel; the medium-concentration emulsion circulating unit comprises a second collecting piece 41, a second oil return tank 42, a second oil purifying tank 43 and a plurality of second nozzles which are communicated sequentially through an infusion pipeline; the second nozzles are configured as second output ends, and the second collecting members 41 are disposed below the respective racks 1. And each second nozzle is provided with a liquid stop valve for controlling liquid spraying of the second nozzle. A second jet pump for supplying jet pressure is provided in the fluid line through which the second clean tank 43 communicates with the second jet nozzle, and a second fluid return pump for returning fluid power is provided in the fluid line between the second collecting member 41 and the second fluid return tank 42. Meanwhile, a magnetic filter 44 and a second flat bed filter 45 for purifying the emulsion are arranged between the second oil return tank 42 and the second oil purifying tank 43, and the magnetic filter 44 mainly serves to filter and remove the mixed ferromagnetic impurities in the liquid to be filtered, so that the content of the ferromagnetic impurities in the liquid to be filtered is reduced. The first collecting member 21 and the second collecting member 41 may be in an open box shape, or may be otherwise.
The high-concentration emulsion injection unit is provided with a third output end which can act on the running strip steel. The high concentration emulsion spray unit comprises a third clean tank 51 and a third nozzle, which are arranged as a third output, in communication via a fluid line. And each third nozzle is provided with a liquid stop valve for controlling liquid spraying. A third jet pump for providing jet power is arranged on the infusion pipeline communicated with the third clean oil tank 51 and the third nozzle.
And a squeeze roller 8 is arranged on the strip steel running between the adjacent frames, and the squeeze roller 8 is positioned between the second nozzle running the strip steel and the third nozzle and is used for squeezing the strip steel cooling and emulsion flowing out of the frame 1, so that the spraying effect of the high-concentration emulsion is ensured.
The first clean oil tank 23, the second clean oil tank 43 and the third clean oil tank 51 are respectively provided with a stirrer 9 driven by an external variable frequency motor, and may be provided with the first oil return tank 22 and the second oil return tank 42 at the same time if necessary. The variable frequency stirrer uses different stirring speeds, so that the particle size of the rolling oil in the lubrication system can be controlled. The third clean oil tank 51 filled with the emulsion with high concentration is stirred at a low speed, so that the large particle size can be ensured; the first clean tank 23 and the second clean tank 43 can be stirred at a high speed to achieve a small particle size.
Wherein the emulsion with different concentrations is prepared from the same rolling oil. The saponification value of the rolling oil is 160-200 mgKOH/g; the rolling oil acid value is less than 5mgKOH/g. The kinematic viscosity of the rolling oil is between 30 and 60mm < 2 >/s at 40 ℃. The granularity of the rolling oil in the emulsion is between 0.5 and 10 um.
The lubricating system further comprises a desalting water tank and a rolling oil tank, wherein the desalting water tank and the rolling oil tank are respectively communicated with the emulsion system, a flow valve is arranged on a pipeline communicated with the desalting water tank and the rolling oil tank, and an emulsion concentration detector is arranged in the low-concentration emulsion circulating unit, the concentration emulsion circulating unit and the high-concentration emulsion spraying unit. These settings and control methods are all conventional techniques and are not described herein.
A lubrication method for cold continuous rolling of silicon steel, the lubrication method being based on a lubrication system, the lubrication method comprising:
when the middle-low grade silicon steel is produced, the lubricating method comprises the step of combined lubrication of the low-concentration emulsion circulating unit and the middle-concentration emulsion circulating unit; wherein the first output end of the low concentration circulation unit sprays liquid to the roller systems of the machine frames at the tail end, and the second output end of the medium concentration circulation unit sprays liquid to the roller systems of other machine frames and the running strip steel.
Specifically, the first nozzles are arranged at the inlet side end of the No. 6 frame 1, and spray liquid to the roller gap between the supporting roller 100 and the intermediate roller 101, the roller gap between the intermediate roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel respectively;
the second nozzles are respectively arranged on the strip steel running at the inlet side end, the outlet side end and the outlet side end of the No. 1-5 frame 1; the second nozzle is arranged to spray liquid to the roller gap between the intermediate roller 100 and the intermediate roller 101, the roller gap between the intermediate roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the inlet side end of the No. 1-5 frame 1, the second nozzle is arranged to spray liquid to the roller gap between the intermediate roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the outlet side end of the No. 1-5 frame 1, and the second nozzle is arranged to spray liquid to the surface of the running strip steel.
The concentration of the low-concentration emulsion output by the first output end of the low-concentration circulation unit is 1.0% -3.0%, the injection rate of the low-concentration emulsion is 4000-8000 liters/min, and the injection pressure is 0.7-0.9MPa;
the concentration of the low-concentration emulsion output by the second output end of the medium-concentration circulation unit is 3.0% -5.0%, the spraying rate of the medium-concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
When high-grade silicon steel is produced, the lubricating method comprises a medium concentration emulsion circulating unit, wherein the second output end of the medium concentration circulating unit sprays liquid to the roller systems of all the racks and the running strip steel;
specifically, the second nozzles are respectively arranged at the inlet side end, the outlet side end and the running strip steel of the 1-6 machine frame 1; the second nozzle is arranged to spray liquid to the roller gap between the supporting roller 100 and the middle roller 101, the roller gap between the middle roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the inlet side of the No. 1-6 frame, the second nozzle is arranged to spray liquid to the roller gap between the middle roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the outlet side of the No. 1-5 frame, and the second nozzle is arranged to spray liquid to the surface of the running strip steel.
The concentration of the low-concentration emulsion output by the second output end of the medium-concentration circulation unit is 3.0% -5.0%, the spraying rate of the medium-concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
When the ultra-high grade silicon steel is produced, the lubricating method comprises the step of combined lubrication of a medium concentration emulsion circulating unit and a high concentration emulsion spraying unit, wherein the second output end of the medium concentration circulating unit sprays liquid to a roller system of a No. 1-6 rack 1 and running strip steel, and the third output end of the high concentration emulsion spraying unit sprays liquid to the running strip steel.
The second nozzles are respectively arranged at the inlet side end and the outlet side end of the 1-6 machine frame and on the running strip steel; the second nozzle is arranged to spray liquid to the roller gap between the supporting roller 100 and the middle roller 101, the roller gap between the middle roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the inlet side of the No. 1-6 frame 1, the second nozzle is arranged to spray liquid to the roller gap between the supporting roller 100 and the middle roller 101 at the outlet side of the No. 1-3 frame 1, the second nozzle is arranged to spray liquid to the roller gap between the middle roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel at the outlet side of the No. 4-5 frame 1, and the second nozzle is arranged to spray liquid to the surface of the running strip steel; the third nozzles are respectively arranged on the strip steel at the inlet side end of the No. 1-6 frame 1, and spray liquid to the surface of the strip steel.
The concentration of the high-concentration emulsion output by the third output end of the high-concentration spraying unit is 10% -20%, the spraying rate of the high-concentration emulsion is 10-240 liters/min, and the spraying pressure is 0.7-0.9MPa.
The present lubrication system is illustrated below:
embodiment one: an efficient lubrication process and an emulsion system suitable for cold continuous rolling of medium and low grade silicon steel are needed, referring to fig. 2, the device and the method comprise: starting the medium-concentration emulsion circulating unit and the low-concentration emulsion circulating unit; the medium-concentration emulsion sequentially passes through a second jet pump, a pipeline and a valve table from a second clean oil tank 43 and is respectively arranged on strip steel running at the inlet side end, the outlet side end and the outlet side end of the No. 1-5 rack from a second nozzle; the second nozzle is arranged to spray liquid to the nip of the supporting roller 100 and the middle roller 101 at the inlet side end of the No. 1-5 frame, the nip of the middle roller 101 and the working roller 102 and the nip between the working roller 102 and the strip steel, the second nozzle is arranged to spray liquid to the nip of the middle roller 101 and the working roller 102 at the outlet side end of the No. 1-5 frame, the nip between the working roller 102 and the strip steel, the second nozzle is arranged to spray liquid to the surface of the running strip steel, the spraying pressure is 0.5-0.9MPa, the spraying flow rate of each frame is 24000-48000L/min, the emulsion flowing down from the frame 1 flows into the emulsion second oil return tank 42 through the second collecting piece 41 and the pipeline, and the emulsion of the second oil return tank 42 flows into the second oil cleaning tank 43 through the second oil return pump, the magnetic filter 44 and the second flat bed filter 45. At the same time, the second nozzle on the second nozzle frame 7 sprays liquid to the surface of the strip steel, and the strip steel is properly cooled and washed. The low concentration emulsion is sequentially arranged at the inlet side end of a No. 6 frame from a first clean oil tank 23 through a first spray pump, a pipeline, a valve table and a first spray nozzle of a spray beam device at the inlet side of the frame, and spray liquid is respectively arranged to the nip of a supporting roller 100 and a middle roller 101, the nip of the middle roller 101 and a working roller 102 and the nip between the working roller 102 and strip steel, the spray pressure is 0.5-0.9MPa, the spray flow rate is 4000-8000L/min, the emulsion flowing down from the frame flows into a first oil return tank 22 through a first collecting piece 21 and the pipeline, and the emulsion of the first oil return tank 22 flows into the first clean oil tank 23 through the first oil return pump and a first flat bed filter 24.
The embodiment is described for the case of combining the medium concentration emulsion circulation and the low concentration emulsion circulation, and the medium and low grade silicon steel can smoothly finish the rolling process in the mode and obtain higher rolling speed.
Embodiment two: with reference to fig. 3, the device and method include: the medium-concentration emulsion is respectively arranged at the inlet side end, the outlet side end and the running strip steel of the 1-6 frames from the second spray pump, the pipeline and the valve table from the second spray nozzle through the second clean oil tank 43 in sequence; the second spray nozzle is arranged to spray liquid to the nip of the supporting roller 100 and the middle roller 101, the nip of the middle roller 101 and the working roller 102 and the nip between the working roller 102 and the strip steel on the inlet side of the No. 1-6 frame 1, the second spray nozzle is arranged to spray liquid to the nip of the middle roller 101 and the working roller 102 at the outlet side of the No. 1-5 frame 1 and the nip between the working roller 102 and the strip steel, the second spray nozzle is arranged to spray liquid to the surface of the running strip steel, each frame sprays flow 24000-48000L/min, the emulsion flowing down from the frame flows into the emulsion second oil return tank 42 through the second collecting piece 41 and the pipeline, and the emulsion of the second oil return tank 42 flows into the second oil purifying tank 43 through the second oil return pump, the magnetic filter 44 and the second flat bed filter 45. At the same time, the second nozzle on the second nozzle frame 7 sprays liquid to the surface of the strip steel, and the strip steel is properly cooled and washed.
The embodiment is described for the condition that the medium concentration emulsion is recycled and used independently, and the high-grade silicon steel can smoothly finish the rolling process in the mode and obtain excellent strip steel surface quality.
Embodiment III: with reference to fig. 4, the device and method include: the medium-concentration emulsion is respectively arranged at the inlet side end, the outlet side end and the running strip steel of the 1-6 frames from the second spray pump, the pipeline and the valve table from the second spray nozzle through the second clean oil tank 43 in sequence; the second nozzle is arranged to spray liquid to the roller gap between the supporting roller 102 and the middle roller 101 at the inlet side of the No. 1-6 rack, the roller gap between the middle roller 101 and the working roller 102 and the roller gap between the working roller 102 and the strip steel, the second nozzle is arranged to spray liquid to the roller gap between the supporting roller and the middle roller at the outlet side of the No. 1-3 rack, the second nozzle is arranged to spray liquid to the roller gap between the middle roller 101 and the working roller 102 at the outlet side of the No. 4-5 rack 1 and the roller gap between the working roller 102 and the strip steel, the second nozzle is arranged to spray liquid to the surface of the running strip steel, the spraying pressure is 0.5-0.9MPa, and the spraying flow rate of each rack is 24000-48000L/min; the ejected emulsion passes through the block of the wringer roller 8 and flows into the second collecting member 41. The high-concentration emulsion sequentially passes through a third jet pump, a pipeline and a third nozzle of a valve table from a third clean oil tank 51, is respectively arranged on the strip steel at the inlet side end of the No. 1-6 rack, and is arranged by spraying liquid to the surface of the strip steel. The high-concentration emulsion flowing down from the frame flows into the second oil return tank 42 together with the medium-concentration emulsion through the second collecting member 41 and the pipeline, and the emulsion in the second oil return tank 42 flows into the second clean oil tank 43 again through the second oil return pump, the magnetic filter 44 and the second flat bed filter 45.
The embodiment is described for the case of using the medium concentration emulsion circulation unit and the high concentration emulsion injection unit in combination, and the ultra-high grade silicon steel can be rolled in the mode, so that an ideal lubrication effect is obtained, the problem that the rolling force of the ultra-high grade silicon steel is rapidly increased in the cold continuous rolling production process is avoided, the rolling process is smoothly completed, and a high rolling speed is obtained.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," "fourth" may explicitly or implicitly include at least one such feature.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A lubrication system for cold continuous rolling of silicon steel is characterized by comprising
The cold continuous rolling mill comprises six groups of racks which are sequentially connected in series along a production line, and a single group of racks is internally provided with a roller system for driving strip steel to run;
a low concentration emulsion circulation unit provided with a first output end which can act on a roller system of the rack positioned at the tail end; the low-concentration emulsion circulating unit comprises a first collecting piece, a first oil return tank, a first clean oil tank and a plurality of first nozzles which are sequentially communicated, the first nozzles are configured to be the first output ends, and the first collecting piece is arranged below the rack at the tail end;
the medium-concentration emulsion circulating unit is provided with a second output end which can act on the roller system of each rack and the running strip steel; the medium-concentration emulsion circulating unit comprises a second collecting piece, a second oil return tank, a second clean oil tank and a plurality of second nozzles which are sequentially communicated; a plurality of second nozzles configured as the second output ends, the second collecting pieces being disposed below the respective racks;
the high-concentration emulsion injection unit is provided with a third output end which can act on the running strip steel; the high-concentration emulsion injection unit comprises a third clean oil tank and a plurality of third nozzles which are communicated, and the plurality of third nozzles are configured as the two output ends.
2. A cold continuous rolling lubrication system for silicon steel according to claim 1, wherein: the roller system comprises two pairs of supporting rollers, two pairs of middle rollers and two pairs of working rollers, wherein the two pairs of working rollers are arranged between the two pairs of middle rollers, and the two pairs of middle rollers are arranged between the two pairs of supporting rollers; and driving the working roller to rotate, and sequentially driving the intermediate roller and the supporting roller to rotate.
3. A cold continuous rolling lubrication system for silicon steel according to claim 1, wherein: and arranging squeeze rollers on the strip steel running between the adjacent frames, wherein the squeeze rollers are positioned between the second nozzle and the third nozzle for running the strip steel.
4. A method of lubricating a cold continuous rolling of silicon steel, characterized in that the lubricating method is performed based on the lubricating system according to any one of claims 1 to 3, the lubricating method comprising:
when the middle-low grade silicon steel is produced, controlling the first output end of the low-concentration emulsion circulating unit to spray liquid to the roller system of the machine frame at the tail end, and controlling the second output end of the middle-concentration emulsion circulating unit to spray liquid to the roller systems of other machine frames and the running strip steel;
when high-grade silicon steel is produced, controlling the second output end of the medium-concentration emulsion circulating unit to spray liquid to all roller systems of the frame and the running strip steel;
when the ultra-high grade silicon steel is produced, the second output end of the medium concentration emulsion circulating unit is controlled to spray the liquid to the roller systems of the frames and the running strip steel, and the third output end of the high concentration emulsion spraying unit is controlled to spray the liquid to the running strip steel.
5. The method for lubricating cold continuous rolling of silicon steel according to claim 4, wherein the method comprises the following steps:
when the middle-low grade silicon steel is produced, the roller system liquid spraying from the first output end of the low-concentration emulsion circulating unit to the tail end of the rack is controlled, and the second output end of the middle-concentration emulsion circulating unit is controlled to spray liquid to other roller systems of the rack and the running strip steel, and the method specifically comprises the following steps:
the concentration of the low-concentration emulsion output by the first output end of the low-concentration emulsion circulation unit is 1.0% -3.0%, the injection rate of the low-concentration emulsion is 4000-8000 liters/min, and the injection pressure is 0.7-0.9MPa;
the concentration of the medium concentration emulsion output by the second output end of the medium concentration emulsion circulation unit is 3.0% -5.0%, the spraying rate of the medium concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
6. The method for lubricating cold continuous rolling of silicon steel according to claim 4, wherein the method comprises the following steps: when high-grade silicon steel is produced, controlling the second output end of the medium concentration emulsion circulating unit to spray liquid to all roller systems of the frame and the running strip steel, and specifically comprising the following steps:
the concentration of the medium concentration emulsion output by the second output end of the medium concentration emulsion circulation unit is 3.0% -5.0%, the spraying rate of the medium concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa.
7. The method for lubricating cold continuous rolling of silicon steel according to claim 4, wherein the method comprises the following steps: when the ultra-high grade silicon steel is produced, controlling the second output end of the medium concentration emulsion circulation unit to spray the liquid to the roller systems of the frames and the running strip steel, and controlling the third output end of the high concentration emulsion injection unit to spray the liquid to the running strip steel, wherein the method specifically comprises the following steps:
the concentration of the medium concentration emulsion output by the second output end of the medium concentration emulsion circulation unit is 3.0% -5.0%, the spraying rate of the medium concentration emulsion is 24000-48000 liters/min, and the spraying pressure is 0.5-0.9MPa;
the concentration of the high-concentration emulsion output by the third output end of the high-concentration emulsion injection unit is 10% -20%, the injection rate of the high-concentration emulsion is 10-240 liters/min, and the injection pressure is 0.7-0.9MPa.
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| CN115740049A (en) | 2023-03-07 |
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