Non-ferrous metal strip cold rough rolling reversible rolling production system

Abstract

A reversible rolling production system for cold rough rolling of non-ferrous metal strips is characterized in that an on-line air cooling device is added in an original cold rough rolling production line of the non-ferrous metal strips, tail gas discharged by a full-oil recovery system is used for air cooling of the rolled strips, the temperature of rolled strip coils is reduced, and the problem that reversible rolling is not uniform due to thermal superposition of rolling of front and back passes is solved. The problem that the temperature after rolling reaches the non-ferrous metal phase transition temperature or is higher than the recrystallization temperature occurs, and reversible rolling of cold rough rolling of all non-ferrous metal strips is achieved; according to the system, auxiliary transportation equipment and operation which need to be matched with an original non-ferrous metal strip cold rough rolling production line are omitted, rolled strip coils do not need to be temporarily stored and cooled, the rolling production period is shortened, the occupied area of production is reduced, and the system has the advantages of being high in production efficiency and low in equipment investment; in addition, the tail gas discharged by the full oil recovery system is used for carrying out air cooling on the rolled strip, so that the environmental pollution caused by the tail gas discharged by the full oil recovery system to the atmosphere is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cold rolling production in the aluminum processing industry, and in particular to a cold rough rolling reversible rolling production system for nonferrous metal strips. Background Art

[0002] At present, the hot-rolled coils of non-ferrous metal strips such as copper, titanium, nickel, and molybdenum have all achieved reversible rolling during the subsequent cold rolling, that is, after uncoiling once, they are directly rolled to the target thickness through multiple reversible rolling from left to right and right to left, so they have extremely high production efficiency. However, some non-ferrous metal strips cannot be reversibly rolled during cold rolling. For example, aluminum and aluminum alloys, after hot rolling to a strip thickness of 2~3mm, in the subsequent cold rolling to 0.1~1.0mm cold rough rolling process, the strips are all rolled in one direction in one pass, that is, one pass is rolled after the uncoiling machine on one side of the rolling mill is uncoiled, the material is unloaded and rolled on the other side of the rolling mill, and then the strip is transported to the uncoiling machine side of the rolling mill to be uncoiled again for the second pass rolling, and this cycle is repeated many times until the target thickness is reached.

[0003] The reason why some non-ferrous metal strips cannot be reversibly rolled in cold rough rolling is that their material strength is low, and the reduction rate and heat generation are high during each pass of rolling. Taking aluminum and aluminum alloy as an example, the temperature of the strip coil after rolling is maintained at about 150-180℃. When reversible rolling is adopted, due to insufficient cooling time, the rolling heat of the subsequent pass is superimposed on the rolling heat of the previous pass, which will make the temperature after the subsequent pass reach the phase change temperature or recrystallization temperature of aluminum and aluminum alloy (about 320℃), and the cold rolling becomes warm rolling, which results in the reduction of the strength and surface quality of the cold rough rolled strip. Therefore, the existing cold rough rolling of zinc, magnesium, aluminum and aluminum alloy strips is that after a batch of cold rolling of several coils, they are temporarily stored in the temporary storage area around the rolling mill for cooling. After the temperature drops to room temperature, the whole batch is returned to unwind one by one for the next rolling. Therefore, the rolling process requires auxiliary transportation equipment and operations, and there are many problems such as long rolling cycle time, large production area, low production efficiency, and high equipment investment, which directly affect the economic benefits of the enterprise. Summary of the invention

[0004] In order to overcome the shortcomings in the background technology, the present invention discloses a reversible rolling production system for cold rough rolling of non-ferrous metal strips. In the original cold rough rolling production line of non-ferrous metal strips, an online air cooling device is added to reduce the temperature of the coil after rolling, so as to avoid the problem that the temperature reaches the phase change temperature or recrystallization temperature of the non-ferrous metal due to the superposition of the heat of the previous and subsequent rolling passes during reversible rolling, thereby realizing the reversible rolling of cold rough rolling of all non-ferrous metal strips.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a non-ferrous metal strip cold rough rolling reversible rolling production system, including a rolling mill system and a full oil recovery system; the rolling mill system includes a rolling mill, a rolling oil spray device, an air cooling device, a clamping roller group, a plate roller, and a coiler; the rolling oil spray device, the air cooling device, the clamping roller group, the plate roller, and the coiler are symmetrically arranged on both sides of the rolling mill in sequence; wherein the rolling mill, the rolling oil spray device, and the air cooling device are provided with oil fume hoods on the outside; the rolling oil spray device is connected to the full oil recovery system through an oil pipeline and the oil fume hood through an air duct; the air cooling device is connected to a cold air dehumidification system through an air duct; when the non-ferrous metal strip cold rough rolling reversible rolling production system is working, the non-ferrous metal strip coil is arranged on a coiler on one side for uncoiling and rolling, and the rolling process In the process, the rolling oil spraying device located at the inlet side of the rolling mill sprays rolling oil on the non-ferrous metal strips, and the air cooling device located at the outlet side of the rolling mill cools the non-ferrous metal strips by blowing air to reduce the temperature of the non-ferrous metal strips after rolling; when the previous rolling is completed, there is no need to unload the non-ferrous metal strip coils, and reverse rolling can be carried out after adjusting the rolling roller gap. After multiple passes of reversible rolling, the target thickness is directly rolled, thereby greatly improving the production efficiency; during the production process of the non-ferrous metal strip cold rough rolling reversible rolling production system, there is no need to unload the non-ferrous metal strip coils and temporarily store them in the temporary storage area around the rolling mill for cooling, which eliminates the auxiliary transportation equipment and operations required for the original non-ferrous metal strip cold rough rolling production line, shortens the rolling production cycle, reduces the production area occupied, and correspondingly reduces the equipment investment.

[0006] Furthermore, the full oil recovery system includes a fume absorption system and an oil washing regeneration system; the fume absorption system includes an absorption tower, and the absorption tower is provided with an air inlet and an air outlet; the fume hood is connected to the air inlet of the absorption tower through an air duct, and a fan is provided on the air duct connecting the fume hood and the absorption tower, and the oil-containing fume generated during the rolling process enters the absorption tower through the air duct for recovery; The washing oil regeneration system includes a rolling oil tank and a washing oil transfer tank; the washing oil containing rolling oil discharged from the absorption tower is processed by the washing oil regeneration system, and the rolling oil and washing oil are separated and stored in the rolling oil tank and the washing oil transfer tank respectively; the rolling oil spraying device is connected to the rolling oil tank through an oil pipeline, and a rolling oil delivery pump is arranged on the pipeline connecting the rolling oil spraying device and the rolling oil tank, and the rolling oil stored in the rolling oil tank is pumped to the rolling oil spraying device by the rolling oil delivery pump.

[0007] Furthermore, the air cooling device is provided with two groups of air outlet boxes which are symmetrical in upper and lower directions, and each group of air outlet boxes includes a number of air outlets arranged in an array. The two groups of air outlet boxes blow out cooling air currents to cool the upper and lower sides of the non-ferrous metal respectively, so as to improve the air cooling efficiency; the air outlets are arranged at an angle, facing the rolling mill; the array- and inclined air outlets form a number of shorter boundary layer air flows on the surface of the non-ferrous metal strip, which ensures that the boundary layer air flow has a longer total length to achieve a better air cooling effect, and prevents each boundary layer air flow from being too long to reduce the heat exchange effect.

[0008] Furthermore, two clamping rollers are provided in the clamping roller group, and a temperature sensor is arranged in an array in one of the clamping rollers, and the temperature sensor is used to detect the temperature of the non-ferrous metal strip after being cooled by the air cooling device.

[0009] Preferably, the plate-shaped roller is provided with an array of temperature sensors, and the plate-shaped roller can detect the temperature of the non-ferrous metal strip after being cooled by the air cooling device while detecting the plate shape of the non-ferrous metal strip.

[0010] Preferably, the rolling oil spraying device is connected to the full oil recovery system through the oil pipeline, the oil fume hood and the air cooling device through the air duct.

[0011] Furthermore, the full oil recovery system includes a fume absorption system and an oil washing regeneration system; the fume absorption system is provided with a fan and an absorption tower, and the absorption tower is provided with an air inlet and an air outlet; the fume hood is connected to the air inlet of the absorption tower through an air duct, and the fan is arranged on the air duct connecting the fume hood and the absorption tower; the air cooling device is connected to the air outlet of the absorption tower through an air duct; the national standard requirement for the rolling oil content in the exhaust gas discharged by the existing full oil recovery system is 120mg / m 3 , the actual value can be about 30mg / m 3 , so the exhaust gas discharged by the full oil recovery system will still pollute the atmospheric environment; after adopting the above-mentioned rolling mill system and full oil recovery system connection structure, the exhaust gas discharged by the full oil recovery system is used as the cooling air source of the air cooling device, so as to realize the circulation of the exhaust gas discharged by the full oil recovery system. When the full oil recovery system is working, there is no exhaust gas emission, so the pollution to the air caused by the exhaust gas emission of the full oil recovery system is completely eliminated; in addition, the exhaust gas discharged by the full oil recovery system is used as the cooling air source, which has the advantages of relatively stable temperature (about 30°C) and low water content, and no cooling and dehumidification treatment is required; The washing oil regeneration system includes a rolling oil tank and a washing oil transfer tank; the washing oil containing rolling oil discharged from the absorption tower is processed by the washing oil regeneration system, and the rolling oil and washing oil are separated and stored in the rolling oil tank and the washing oil transfer tank respectively; the rolling oil spraying device is connected to the rolling oil tank through an oil pipeline, and a rolling oil delivery pump is arranged on the pipeline connecting the rolling oil spraying device and the rolling oil tank, and the rolling oil is pumped to the rolling oil spraying device by the rolling oil delivery pump.

[0012] Furthermore, the washing oil regeneration system also includes an oil-water heat exchanger. The washing oil containing rolling oil discharged from the absorption tower is processed by the washing oil regeneration system. The separated washing oil is cooled by the oil-water heat exchanger before entering the washing oil transfer tank, so it has a lower temperature. The washing oil with a lower temperature is absorbed and heat exchanged with the oil-containing flue gas in the rolling process in the absorption tower through gas-liquid two-phase absorption and heat exchange, so that the temperature of the exhaust gas discharged from the absorption tower is maintained at about 30°C, so as to meet the demand for blowing cooling of the exhaust gas discharged from the absorption tower for non-ferrous metal strips after cold rolling.

[0013] Furthermore, the rolling oil tank and the washing oil transfer tank are both arranged underground to reduce the influence of the ambient temperature and maintain the temperature of the rolling oil in the rolling oil tank and the washing oil in the washing oil transfer tank stable.

[0014] Furthermore, a negative pressure regulating valve is provided on the air duct connecting the air cooling device and the full oil recovery system; by adjusting the opening of the negative pressure regulating valve, the full oil recovery system can be controlled to discharge a small amount of exhaust gas into the atmosphere, thereby forming a negative pressure in the fume hood. The negative pressure in the fume hood can prevent the oil-containing fume generated during the rolling of non-ferrous metal strips from overflowing the fume hood, thereby avoiding pollution of the production site environment.

[0015] Due to the adoption of the technical scheme as described above, the present invention has the following beneficial effects: a non-ferrous metal strip cold rough rolling reversible rolling production system disclosed by the present invention adds an online cold air dehumidification system to the original non-ferrous metal strip cold rough rolling production line, or uses the exhaust gas discharged by the full oil recovery system to air-cool the rolled strip, thereby reducing the temperature of the rolled strip coil, solving the problem that the temperature after rolling reaches the phase change temperature or the recrystallization temperature of the non-ferrous metal due to the superposition of the heat of the previous and subsequent rolling passes in the reversible rolling, and realizing the reversible rolling of all non-ferrous metal strips cold rough rolling; the non-ferrous metal strip cold rough rolling reversible rolling production system eliminates the auxiliary transportation equipment and operations required by the original non-ferrous metal strip cold rough rolling production line, and the rolled strip coil does not need to be temporarily stored for cooling, thereby shortening the rolling production cycle and reducing the production area occupied, and has the advantages of high production efficiency and low equipment investment; in addition, the exhaust gas discharged by the full oil recovery system is used to air-cool the rolled strip, and the environmental pollution caused by the exhaust gas discharged by the full oil recovery system to the atmospheric environment is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the principle of a nonferrous metal strip cold rough rolling reversible rolling production system according to Embodiment 1; Figure 2 It is a schematic diagram of the connection structure between the rolling mill system and the full oil recovery system of the first embodiment; Figure 3 This is a schematic diagram of the principle of a nonferrous metal strip cold rough rolling reversible rolling production system according to Embodiment 2; Figure 4It is a schematic diagram of the connection structure between the rolling mill system and the full oil recovery system of Example 2.

[0017] In the figure: 1. rolling mill; 2. rolling oil spraying device; 2.1. rolling oil delivery pump; 3. air cooling device; 4. clamping roller group; 4.1. clamping roller; 5. plate roller; 6. coiler; 7. coiler reducer; 8. fume hood; 9. full oil recovery system; 9.2. fan; 9.3. absorption tower; 9.3.1. washing oil delivery pump; 9.3.2. washing oil flow meter; 9.3.3. bag filter; 9.3.4. absorption tower circulation pump; 9.3.5. duplex filter; 9.3.6. rolling oil washing oil flow meter; 9.8. degassing tower; 9.8 .1. Degassing tower circulation pump; 9.9. Oil-water heat exchanger; 9.11. Waste heat recovery heat exchanger; 9.12. Thermal oil heat exchanger; 9.13. Analysis tower; 9.13.1. Analysis tower circulation pump; 9.14. Condenser; 9.15. Rolling oil tank; 9.15.1. Finished oil output pump; 9.17. Rolling oil tank; 9.19. Washing oil transfer tank; 9.20. Cooling water system A; 9.21. Thermal oil heater; 9.22. Cooling water system B; 9.23. Vacuum pump system; 10. Cold air dehumidification system; 11. Negative pressure regulating valve. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. Embodiment 1:

[0019] See the instruction manual Figure 1 : A non-ferrous metal strip cold rough rolling reversible rolling production system, including a rolling mill system and a full oil recovery system 9; the rolling mill system includes a rolling mill 1, a rolling oil spray device 2, an air cooling device 3, a clamping roller group 4, a plate roller 5, a coiler 6, and an oil fume hood 8; the rolling oil spray device 2, the air cooling device 3, the clamping roller group 4, the plate roller 5, and the coiler 6 are symmetrically arranged on both sides of the rolling mill 1 in sequence; wherein the rolling mill 1, the rolling oil spray device 2, and the air cooling device 3 are in the oil fume hood 8; the air cooling device 3 is provided with two groups of air outlet boxes symmetrically arranged in upper and lower directions; the two groups of air outlet boxes are provided with a plurality of air outlets in an array facing each other, and the air outlets are arranged obliquely, facing the rolling mill 1, and the air ducts connected to the air cooling devices 3 on both sides are independently provided with switch valves for controlling the switches of the air cooling devices 3 on both sides; the clamping roller group 4 is provided with two clamping rollers, one of which is provided with a temperature sensor in an array, or the plate roller 5 is provided with a temperature sensor in an array; See the instruction manual Figure 2: The full oil recovery system 9 includes a flue gas absorption system and a washing oil regeneration system; the flue gas absorption system includes a rolling mill fan 9.2 and an absorption tower 9.3, the absorption tower 9.3 is provided with a washing oil input port, a washing oil output port, an air inlet and an air outlet, the fume hood 8 is connected to the air inlet of the absorption tower 9.3 through an air duct and the fan 9.2, and the air outlet is directly connected to the atmosphere; the washing oil input port pipeline of the absorption tower 9.3 is provided with a washing oil delivery pump 9.3.1 and a washing oil flowmeter 9.3.2, and the washing oil output port pipeline of the absorption tower 9.3 is provided with a bag filter 9.3.3, an absorption tower circulation pump 9.3.4, a duplex filter 9.3.5, and a rolling oil washing oil flowmeter 9.3.6; The washing oil regeneration system includes a degassing tower 9.8, a desorption tower 9.13, a rolling oil tank 9.15, a rolling oil tank 9.17, a washing oil transfer tank 9.19, and a vacuum pump system 9.23, wherein the rolling oil tank 9.17 and the washing oil transfer tank 9.19 are both arranged underground; the degassing tower 9.8 is provided with a degassing tower containing rolling oil washing oil inlet, a degassing tower containing rolling oil washing oil outlet, and a degassing tower vacuum port; the desorption tower 9.13 is provided with a desorption tower containing rolling oil washing oil inlet, a rolling oil gas outlet, a washing oil outlet, and a desorption tower vacuum port; the rolling oil tank 9.15 is provided with a rolling oil inlet, a rolling oil outlet, and a rolling oil tank vacuum port; the washing oil transfer tank 9.19 is provided with an oil inlet and an oil outlet; The degassing tower 9.8's degassing tower rolling oil washing oil inlet is connected to the washing oil output pipeline of the flue gas absorption system, and the degassing tower rolling oil washing oil outlet is connected to the desorption tower rolling oil washing oil inlet of the desorption tower 9.13; the rolling oil gas outlet of the desorption tower 9.13 is connected to the rolling oil inlet of the rolling oil tank 9.15, and the washing oil outlet is connected to the oil inlet of the washing oil transfer tank 9.19; the rolling oil outlet of the rolling oil tank 9.15 is connected to the rolling oil tank 9.17; the degassing tower vacuum port, the desorption tower vacuum port, and the rolling oil tank vacuum port are all connected to the vacuum pump system 9.23; The pipeline connecting the degassing tower rolling oil washing oil outlet of the degassing tower 9.8 and the degassing tower rolling oil washing oil inlet of the degassing tower 9.13 is provided with a degassing tower circulation pump 9.8.1 and a heat transfer oil heat exchanger 9.12; the pipeline connecting the rolling oil gas outlet of the degassing tower 9.13 and the rolling oil inlet of the rolling oil tank 9.15 is provided with a condenser 9.14; the pipeline connecting the rolling oil tank 9.15 and the rolling oil tank 9.17 is provided with a finished oil output pump 9.15. 1; the connection pipeline between the washing oil outlet of the analysis tower 9.13 and the oil inlet of the washing oil transfer tank 9.19 is provided with a analysis tower circulation pump 9.13.1 and an oil-water heat exchanger 9.9; the connection pipeline between the degassing tower containing rolling oil washing oil outlet of the degassing tower 9.8 and the analysis tower containing rolling oil washing oil inlet of the analysis tower 9.13, and the connection pipeline between the washing oil outlet of the analysis tower 9.13 and the oil inlet of the washing oil transfer tank 9.19 is provided with a waste heat recovery heat exchanger 9.11; The oil-water heat exchanger 9.9 is connected to a cooling water system A9.20; the thermal oil heat exchanger 9.12 is connected to a thermal oil heater 9.21; the condenser 9.14 is connected to a cooling water system B9.22; Liquid level gauges are provided on the degassing tower 9.8 and the washing oil transfer tank 9.19; a control system is provided in the full oil recovery system 9; the fan 9.2, the absorption tower circulation pump 9.3.4, the degassing tower circulation pump 9.8.1, the analytical tower circulation pump 9.13.1, the finished oil output pump 9.15.1, and the liquid level gauge are electrically connected to the control system; the absorption tower circulation pump 9.3.4, the degassing tower circulation pump 9.8.1, the analytical tower circulation pump 9.13.1, and the finished oil output pump 9.15.1 are variable frequency pumps; The rolling oil spray device 2 is connected to the rolling oil tank 9.17 through an oil pipeline, and a rolling oil delivery pump 2.1 is arranged on the pipeline connecting the rolling oil spray device 2 and the rolling oil tank 9.17; switch valves are independently arranged on the oil pipelines connected to the rolling oil spray devices 2 on both sides to control the switch of the rolling oil spray devices 2 on both sides; the air cooling device 3 is connected to the cold air dehumidification system 10 through an air duct, and the cold air dehumidification system 10 provides cooling air for the air cooling device 3.

[0020] When the rolling mill system is working, the non-ferrous metal strip coil is set on the coiler 6 on one side for uncoiling and rolling. During the rolling process, the rolling oil spraying device 2 located on the inlet side of the rolling mill 1 is controlled by the switch valve to spray rolling oil on the non-ferrous metal strip, and the air cooling device 3 located on the outlet side of the rolling mill 1 blows air to cool the non-ferrous metal strip, so as to reduce the temperature of the non-ferrous metal strip after rolling; after the previous rolling is completed, there is no need to unload the non-ferrous metal strip coil, and the rolling roll gap is adjusted to carry out reverse rolling. After multiple reversible rolling, it is directly rolled to the target thickness, thereby greatly improving the production efficiency; during the production process of the non-ferrous metal strip cold rough rolling reversible rolling production system, there is no need to unload the non-ferrous metal strip coil and temporarily store it in the temporary storage area around the rolling mill for cooling, thereby eliminating the auxiliary transportation equipment and operations required for the original non-ferrous metal strip cold rough rolling production line, thereby shortening the rolling production cycle, reducing the production occupied area, and correspondingly reducing the equipment investment; When the full oil recovery system 9 is working, the fume hood 8 sends the oily fume discharged from the rolling mill to the corresponding absorption tower 9.3 under the negative pressure of the fan 9.2 for gas-liquid two-phase absorption and heat exchange, and the purified air that meets the emission standards is discharged into the atmosphere; the washing oil containing rolling oil passes through the bag filter 9.3.3 to remove large particles of impurities, and then passes through the corresponding absorption tower circulation pump 9.3.4 to the double filter 9.3.5 for efficient purification. The purified washing oil containing rolling oil is controlled by the absorption tower circulation pump 9.3.4 according to the control system. , through the rolling oil wash oil flow meter 9.3.6, and finally sent to the degassing tower 9.8; under the action of the vacuum pump system 9.23, the rolling oil wash oil removes the water contained in the degassing tower 9.8; under the pressure of the degassing tower circulation pump 9.8.1, the dehydrated rolling oil wash oil enters the waste heat recovery heat exchanger 9.11 and the heat transfer oil heat exchanger 9.12 in turn for heating, and is sent to the analysis tower 9.13 after reaching the set temperature; under the action of the vacuum pump system 9.23, the rolling oil wash oil is heated in the analysis tower 9.13. The vacuum decompression fractionation is performed; the separated rolling oil vapor enters the condenser 9.14 under the action of vacuum to exchange heat with the cooling water system B9.22, and the condensed rolling oil enters the rolling oil tank 9.15 to form the rolling oil finished oil; the finished oil enters the rolling oil tank 9.17 under the action of the finished oil output pump 9.15.1 for reuse; the separated wash oil enters the wash oil transfer tank 9.17 under the action of the analytical tower circulation pump 9.13.1 after cooling through the waste heat recovery heat exchanger 9.11 and the oil-water heat exchanger 9.9 in turn. 19 for storage, and then delivered to the corresponding absorption tower 9.3 by the wash oil delivery pump 9.3.1 for reuse; the wash oil delivery pump 9.3.1, the absorption tower circulation pump 9.3.4, the degassing tower circulation pump 9.8.1, the analysis tower circulation pump 9.13.1, and the finished oil output pump 9.15.1 are all frequency-converted controlled, and the level gauges of the wash oil transfer tank 9.19 and the absorption tower 9.3 participate in the frequency-converted control of the wash oil delivery pump 9.3.1 and the absorption tower circulation pump 9.3.4 to control the liquid level of the wash oil in the absorption tower 9.3. Embodiment 2:

[0021] See the instruction manual Figure 3 , 4 : In this embodiment, the oil fume hood 8 is connected to the absorption tower 9.3 through the air duct and the fan 9.2; the rolling oil spray device 2 is connected to the rolling oil tank 9.17 through the oil pipeline, and a rolling oil delivery pump 2.1 is arranged on the pipeline connecting the rolling oil spray device 2 and the rolling oil tank 9.17, and switch valves are independently arranged on the oil pipelines connected to the rolling oil spray devices 2 on both sides to control the switch of the rolling oil spray devices 2 on both sides; the air cooling device 3 is connected to the air outlet of the absorption tower 9.3 through the air duct, and switch valves are independently arranged on the air ducts connected to the air cooling devices 3 on both sides to control the switch of the air cooling devices 3 on both sides; In this embodiment, the exhaust gas discharged from the full oil recovery system 9 is used as the cooling air source of the air cooling device 3, and the exhaust gas discharged from the full oil recovery system 9 is recycled to achieve cooling of the non-ferrous metal strip after rolling. Therefore, there is no more exhaust gas emission in the full oil recovery system, and the pollution to the air caused by the exhaust gas emission of the full oil recovery system is completely eliminated.

[0022] In addition, in this embodiment, when the rolling mill system is working, when the non-ferrous metal strip coil is set on the coiler 6 on one side for uncoiling and rolling, the rolling oil spraying device 2 located on the inlet and outlet sides of the rolling mill 1 sprays rolling oil on the non-ferrous metal strip at the same time, and the rolling oil sprayed on the outlet side is used to cool the non-ferrous metal strip after rolling, and then the air flow blown out by the air cooling device 3 located on the outlet side of the rolling mill 1 is used to remove the rolling oil on the non-ferrous metal strip, and a second cooling is performed to achieve a better cooling effect. Embodiment three:

[0023] A negative pressure regulating valve 11 is provided on the air duct connecting the air cooling device 3 and the absorption tower 9.3; when the exhaust gas discharged from the full oil recovery system is circulated to cool the non-ferrous metal strip after rolling, the opening of the negative pressure regulating valve 11 can also be adjusted to form a negative pressure in the fume hood 8 to prevent the fume in the fume hood 8 from overflowing and polluting the production environment.

[0024] The various technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, it should be understood that the present invention is intended to protect all changes and improvements of all embodiments within the scope of the present concept and invention.

[0025] Parts of the present invention not described in detail are prior art.

Claims

1. A non-ferrous metal strip cold rough rolling reversible rolling production system, characterized by: The invention comprises a rolling mill system and a full oil recovery system (9); the rolling mill system comprises a rolling mill (1), a rolling oil spraying device (2), an air cooling device (3), a clamping roller group (4), a plate-shaped roller (5), and a coiler (6); the rolling oil spraying device (2), the air cooling device (3), the clamping roller group (4), the plate-shaped roller (5), and the coiler (6) are symmetrically arranged on both sides of the rolling mill (1); wherein an oil fume hood (8) is arranged outside the rolling mill (1), the rolling oil spraying device (2), and the air cooling device (3); The rolling oil spray device (2) is connected to the full oil recovery system (9) through the oil pipeline and the oil fume hood (8) through the air duct; the air cooling device (3) is connected to the cold air dehumidification system (10) through the air duct.

2. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 1, characterized in that: The full oil recovery system (9) comprises a fume absorption system and an oil washing regeneration system; the fume absorption system comprises an absorption tower (9.3), and the absorption tower (9.3) is provided with an air inlet and an air outlet; the fume hood (8) is connected to the air inlet of the absorption tower (9.3) through an air duct; and a fan (9.2) is provided on the air duct connecting the fume hood (8) and the absorption tower (9.3); The washing oil regeneration system comprises a rolling oil tank (9.17) and a washing oil transfer tank (9.19); the washing oil containing rolling oil discharged from the absorption tower (9.3) is treated by the washing oil regeneration system to separate the rolling oil and the washing oil, which are stored in the rolling oil tank (9.17) and the washing oil transfer tank (9.19) respectively; the rolling oil spray device (2) is connected to the rolling oil tank (9.17) through an oil pipeline, and a rolling oil delivery pump (2.1) is provided on the pipeline connecting the rolling oil spray device (2) and the rolling oil tank (9.17).

3. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 1, characterized in that: The air cooling device (3) is provided with two groups of air outlet boxes which are symmetrical in upper and lower directions; the two groups of air outlet boxes are provided with a plurality of air outlets in an array facing each other, and the air outlets are arranged obliquely and face the rolling mill (1).

4. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 1, characterized in that: The clamping roller group (4) is provided with two clamping rollers, and a temperature sensor array is provided in one of the clamping rollers.

5. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 1, characterized in that: The plate-shaped roller (5) is provided with an array of temperature sensors.

6. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 1, characterized in that: The rolling oil spraying device (2) is connected to the full oil recovery system (9) through an oil pipeline, an oil fume hood (8) and an air cooling device (3) through an air duct.

7. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 6, characterized in that: The full oil recovery system (9) comprises a flue gas absorption system and an oil washing regeneration system; the flue gas absorption system is provided with a fan (9.2) and an absorption tower (9.3), and the absorption tower (9.3) is provided with an air inlet and an air outlet; the fume hood (8) is connected to the air inlet of the absorption tower (9.3) through an air duct, and the fan (9.2) is arranged on the air duct connecting the fume hood (8) and the absorption tower (9.3); the air cooling device (3) is connected to the air outlet of the absorption tower (9.3) through the air duct; The washing oil regeneration system comprises a rolling oil tank (9.17) and a washing oil transfer tank (9.19); the washing oil containing rolling oil discharged from the absorption tower (9.3) is treated by the washing oil regeneration system to separate the rolling oil and the washing oil, which are stored in the rolling oil tank (9.17) and the washing oil transfer tank (9.19) respectively; the rolling oil spray device (2) is connected to the rolling oil tank (9.17) through an oil pipeline, and a rolling oil delivery pump is provided on the pipeline connecting the rolling oil spray device (2) and the rolling oil tank (9.17).

8. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 2 or 7, characterized in that: The wash oil regeneration system also includes an oil-water heat exchanger (9.9). After the wash oil containing rolling oil discharged from the absorption tower (9.3) is processed by the wash oil regeneration system, the separated wash oil is cooled by the oil-water heat exchanger (9.9) before entering the wash oil transfer tank (9.19).

9. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 2 or 7, characterized in that: The rolling oil tank (9.17) and the washing oil transfer tank (9.19) are both installed underground.

10. The non-ferrous metal strip cold rough rolling reversible rolling production system according to claim 6, characterized in that: A negative pressure regulating valve (11) is provided on the air duct connecting the air cooling device (3) and the full oil recovery system (9).

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