CN113774397B - Process and equipment for reducing consumption of cold-rolled acid liquor - Google Patents
Process and equipment for reducing consumption of cold-rolled acid liquor Download PDFInfo
- Publication number
- CN113774397B CN113774397B CN202111122790.7A CN202111122790A CN113774397B CN 113774397 B CN113774397 B CN 113774397B CN 202111122790 A CN202111122790 A CN 202111122790A CN 113774397 B CN113774397 B CN 113774397B
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- acid
- rinsing
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- strip
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- 239000002253 acid Substances 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 25
- 239000008237 rinsing water Substances 0.000 claims abstract description 30
- 239000002351 wastewater Substances 0.000 claims abstract description 29
- 239000003595 mist Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims description 44
- 238000005554 pickling Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 14
- 238000005097 cold rolling Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 235000021110 pickles Nutrition 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000008929 regeneration Effects 0.000 abstract description 13
- 238000011069 regeneration method Methods 0.000 abstract description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
- C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a process for reducing cold-rolled acid liquor consumption and equipment thereof, which integrates a last-stage acid tank and a pre-rinsing tank, can directly recycle pre-rinsing water and acid liquor thrown out by a wringing roller, and can greatly reduce ton steel acid consumption under the condition of an acid regeneration station; the low-concentration rinsing wastewater is firstly collected into an acid mist purifying system and is used for purifying and absorbing acid mist, and the generated wastewater is directly discharged to a wastewater treatment station, so that the transfer from an acid regeneration station is avoided, and meanwhile, the water consumption for absorbing the acid mist is reduced.
Description
Technical Field
The invention relates to the technical field of strip steel pickling, in particular to a process and equipment for reducing cold rolling acid liquor consumption.
Background
The iron scale on the surface of the strip steel is required to be removed by acid washing before cold rolling, and the strip steel surface is required to be subjected to multi-stage rinsing after the acid washing is finished so as to thoroughly remove acid liquor residues on the strip steel surface and prevent the strip steel surface from rusting after drying. The process of pickling and rinsing the existing strip steel is shown in figure 1.
After pickling in the final acid tank 3', the continuously running strip 14' is squeezed by a squeezing roller 4', most acid liquor on the surface of the strip 14' falls into the acid tank 3', then the surface of the strip 14' is pre-rinsed by a pre-rinsing spray pipe 6', pre-rinsing water comes from a first-stage rinsing tank 8', the pre-rinsing water falls into a pre-rinsing tank 7', and then flows into a rinsing wastewater tank 12' in a gravity flow mode, and the wastewater collected in the rinsing wastewater tank 12 'is periodically discharged to an acid regeneration station by a rinsing wastewater pump 13' for partial recycling. After pre-rinsing, the strip 14 'enters the first stage rinse tank 8' for further rinsing until it passes through the last stage rinse tank. Fresh water is continuously supplied to the last-stage rinsing tank at a certain flow rate and forwards the fresh water step by step to the step-by-step cascade 11', so that the dynamic update of the rinsing water quality in each-stage rinsing tank is realized, the step-by-step cascade 11' finally enters the pre-rinsing tank 7 'and flows into the rinsing wastewater tank 12' in a gravity flow mode, and the rinsing wastewater pump 13 'periodically discharges the wastewater collected in the rinsing wastewater tank 12' to an acid regeneration station for recycling of an acid regeneration part.
In the strip pickling and rinsing process, pre-rinse wastewater with higher acid content and the trapezoid rinse wastewater are sent to an acid regeneration station for partial recycling, but with the improvement of the acid regeneration process, the development of the acid regeneration process is carried out until the rinse wastewater which is almost not supplied by a consumption unit is needed, and the rinse wastewater is directly discharged to a wastewater treatment station, so that acid liquor in the rinse wastewater is lost. When the strip material is discharged out of the last acid tank, part of high-concentration acid liquor can be directly thrown into the pre-rinsing tank by the squeezing roller in the high-speed rotation process in the squeezing process, and the acid liquor can be lost. Because the pre-rinsing adopts the first-stage rinsing water with poor water quality and the pressure of the first-stage rinsing water is not high, the high-concentration acid liquor on the surface of the strip cannot be removed in a large amount at the first time and is brought into the subsequent rinsing tank, and the dynamic water supplementing amount for maintaining the water quality in the rinsing tanks at all stages is large.
Along with the continuous enhancement of the requirements of industrial energy conservation and consumption reduction and the increasingly strong demands of various production enterprises for reducing the energy consumption of ton steel, the development of a process capable of reducing the acid liquor consumption has a broad market prospect.
Disclosure of Invention
The invention aims to provide a process for reducing the consumption of cold-rolled acid liquor so as to reduce the acid consumption in the strip steel pickling process.
The specific scheme is as follows:
A process for reducing acid consumption in cold rolling of acid, for reducing acid consumption in a post-pickling rinse phase of a strip, comprising the steps of:
S1, after pickling in a final-stage acid tank, a continuously running strip is squeezed by a squeezing roller in the final-stage acid tank, and then pre-cleaned by a pre-rinsing spray pipe, wherein acid liquor squeezed by the squeezing roller, acid liquor thrown out by the squeezing roller at high speed and acid liquor flushed from the surface of the strip by the pre-rinsing spray pipe fall into the final-stage acid tank, and flow back into an acid tank in a gravity flow mode, are mixed with acid liquor in the acid tank, and are pumped out by an acid pump and re-injected into the final-stage acid tank to pickle the strip;
S2, the strip is output from the last-stage acid tank and enters a multi-stage rinsing tank for rinsing, the strip sequentially enters a first-stage rinsing tank to a last-stage rinsing tank, the surface of the strip is rinsed in the first-stage rinsing tank through a first-stage rinsing spray pipe, rinsing water falls into the first-stage rinsing tank, and after the rinsing water is pumped out and pressurized by a first-stage rinsing circulating pump, the surface of the strip is rinsed again through the first-stage rinsing spray pipe until the strip exits the last-stage rinsing tank; the rinsing water in the first-stage rinsing tank finally continuously flows into the acid mist purifying tower through the overflow pipeline.
Further, the rinsing water of the multi-stage rinsing tank flows from the rear stage to the front stage in a stepwise manner.
Further, acid-containing wastewater generated after acid mist is circularly absorbed in the acid mist purifying tower is periodically discharged to a wastewater treatment station for treatment through a wastewater pump.
Further, the flow rate and concentration of the regenerated acid to be supplemented into the acid tank are dynamically adjusted by acid water mass balance.
The invention also provides equipment for reducing cold-rolled acid liquor consumption, which comprises a multi-section pickling tank and a multi-section rinsing tank which are sequentially arranged along the travelling direction of the strip, wherein a wringing roller and a pre-rinsing spray pipe positioned at the rear section of the wringing roller are arranged in the last-section pickling tank of the multi-section pickling tank, a spray head for flushing the front surface and the back surface of the strip is arranged on the pre-rinsing spray pipe, the pre-rinsing spray pipe is connected with a high-pressure pump, the last-section pickling tank is connected with an acid tank through a pipeline, and the acid tank pumps acid liquor into the last-section pickling tank through an acid pump; the device is characterized in that a first-stage rinsing tank of the multi-stage rinsing tank is internally provided with a first-stage rinsing spray pipe, the first-stage rinsing spray pipe is provided with a spray head for carrying out first-stage rinsing on the front surface and the back surface of the strip, rinsing liquid in the first-stage rinsing tank is connected with the first-stage rinsing spray pipe through a first-stage rinsing circulating pump, the first-stage rinsing tank is also connected with an acid mist purifying tower, and the acid mist purifying tower is connected with a wastewater treatment station.
Further, the first-stage rinsing tank is provided with an overflow pipeline, and rinsing water in the first-stage rinsing tank flows into the acid mist purifying tower through the overflow pipeline.
Compared with the prior art, the process and the equipment for reducing the consumption of cold-rolled acid liquor provided by the invention have the following advantages:
1. the final acid tank and the pre-rinsing tank in the prior art are integrated, so that pre-rinsing water and acid liquid thrown out by the wringing roller can be directly recycled, and the acid consumption per ton of steel can be greatly reduced under the condition of an acid regeneration station;
2. the high-pressure pre-rinsing technology is adopted, so that high-concentration acid liquor on the surface of the strip can be removed to the greatest extent, more acid liquor can be recycled, and consumption of new water in a subsequent rinsing section can be reduced;
3. the acid water material balance is utilized to dynamically adjust the flow and the concentration of regenerated acid which is supplemented into the acid tank, so that the concentration of the acid tank can be ensured to be stable under the condition of continuously collecting pre-rinsing water;
4. The low-concentration rinsing wastewater is firstly discharged to the acid mist purifying tower for secondary utilization, and finally the generated acid-containing wastewater is directly discharged to the wastewater treatment station, so that the new water consumption of the acid mist purifying tower is reduced, and the rinsing wastewater is prevented from being transferred from the acid regeneration station, thereby reducing the energy consumption.
Drawings
Fig. 1 shows a schematic diagram of a prior art process for pickling and rinsing strip steel.
Fig. 2 shows a schematic diagram of the pickling and rinsing process of the strip according to the invention.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
The invention provides a process for reducing cold-rolled acid liquor consumption and equipment thereof, wherein the equipment comprises an acid tank 1, an acid pump 2, a final acid tank 3, a wringing roller 4, a regenerated acid supplementing pipeline 5, a pre-rinsing spray pipe 6, a first-stage rinsing tank 8, a first-stage rinsing spray pipe 9, a first-stage rinsing circulating pump 10, a trapezoid rinsing water 11, an acid mist purifying tower 12, a waste water pump 13, a strip 14, a high-pressure pump 15 and an overflow pipeline 16, as shown in figure 2.
The last acid tank 3 and the multi-stage rinsing tank are arranged in sequence along the travelling direction of the strip 14, and the rinsing water of the multi-stage rinsing tank flows from the rear stage to the front stage in a manner of a ladder flow 11.
The final-stage pickling tank 3 is internally provided with a wringing roller 4 and a pre-rinsing spray pipe 6 positioned at the rear section of the wringing roller 4, the pre-rinsing spray pipe 6 is provided with spray heads for pre-rinsing the front and the back sides of the strip 14, the pre-rinsing spray pipe 6 is connected with a high-pressure pump 15, the high-pressure pump 15 conveys rinsing water to the pre-rinsing spray pipe 6 and sprays out from the spray heads on the pre-rinsing spray pipe 6 so as to perform pre-rinsing action after the strip 14 is wrung pickling solution by the wringing roller 4, the final-stage pickling tank 3 is connected with the pickling tank 1 through a pipeline, and the pickling solution of the pickling tank 1 can be pumped into the final-stage pickling tank 3 through the pickling pump 2 to realize the recycling of the pickling solution.
The first-stage rinsing tank 8 of the multi-stage rinsing tank is internally provided with a first-stage rinsing spray pipe 9, the first-stage rinsing spray pipe 9 is provided with a spray head for carrying out first-stage rinsing on the positive and negative sides of the strip 14, and rinsing liquid in the first-stage rinsing tank 8 is connected with the first-stage rinsing spray pipe 9 through a first-stage rinsing circulating pump 10, so that the rinsing liquid in the first-stage rinsing tank 8 can be recycled.
The first-stage rinsing tank 8 is also connected with an acid mist purifying tower 12, rinsing liquid treated by the acid mist purifying tower 12 is conveyed to a wastewater treatment station for treatment through a wastewater pump 13, and regenerated acid treated by an acid regeneration station is connected with the acid tank 1 through a regenerated acid supplementing pipeline 5. The first-stage rinse tank 8 is provided with an overflow line 16, and the rinse water of the cascade 11 finally continuously flows into the acid mist purification tower 12 through the overflow line 16.
The strip is processed in the apparatus as follows:
After pickling in the final acid tank 3, the continuously running strip 14 is squeezed by a squeezing roller 4, most of the high-concentration acid liquid on the surface is removed, and then the acid liquid residue on the surface is reduced to the minimum level by solid cone and fan-shaped high-speed jet impact sprayed by a pre-rinsing spray pipe 6. In the process, the acid liquid extruded by the extruding roller 4, the acid liquid thrown out by the extruding roller 4 at high speed and the acid liquid flushed from the surface of the strip 14 by the pre-rinsing spray pipe 6 fall into the final-stage acid tank 3, then flow back into the acid tank 1 in a gravity flow mode, are mixed with the acid liquid in the acid tank 1, are pumped out by the acid pump 2 and are re-injected into the final-stage acid tank 3 for pickling the strip 14, and are circulated and reciprocated.
The rinsing water sprayed from the pre-rinsing spray pipe 6 is continuously injected into the acid tank 1 to dilute the acid solution concentration in the acid tank 1, and the flow and the concentration of the regenerated acid added into the acid tank 1 through the regenerated acid supplementing pipeline 5 are dynamically adjusted according to the material balance in order to control the original acid solution concentration.
The rinsing water used by the pre-rinsing spray pipe 6 is pressurized by the high-pressure pump 15 and then is converted into high-speed jet flow by the nozzle on the pre-rinsing spray pipe 6 to flush the surface of the strip 14, so that the high-concentration acid liquor on the surface of the strip 14 is removed to the greatest extent before the strip 14 enters the first-stage rinsing tank 8, the subsequent rinsing load is reduced, and the supplementing amount of new water is saved; the strip 14 then enters the subsequent first-stage rinse tank 8, the surface of the strip 14 is rinsed by the first-stage rinse nozzle 9, after the rinsing water falls into the first-stage rinse tank 8, the surface of the strip 14 is rinsed again by the first-stage rinse nozzle 9 after being pumped and pressurized by the first-stage rinse circulation pump 10, and the cycle is repeated until the strip 14 exits the last-stage rinse tank.
In the rinsing process, the residual low-concentration acid liquor on the surface of the running strip 14 is continuously washed down, the acid content of the rinsing water of each stage is slowly increased, and in order to maintain the water quality of the rinsing water in a reasonable interval, fresh water is continuously supplemented to the rinsing tank of the last stage at a certain flow rate and is gradually advanced in a step-by-step manner, so that the dynamic update of the rinsing water quality in the rinsing tanks of each stage is realized. The first-stage rinsing tank 8 is provided with an overflow pipeline 16, and the rinsing water of the cascade 11 finally continuously flows into the acid mist purifying tower 12 through the overflow pipeline 16, and acid-containing wastewater generated after acid mist is circularly absorbed in the tower is periodically discharged to a wastewater treatment station for treatment through a wastewater pump 13.
The process and the equipment for reducing the consumption of the cold-rolled acid liquor have the following advantages:
1. the final acid tank and the pre-rinsing tank in the prior art are integrated, so that pre-rinsing water and acid liquid thrown out by the wringing roller can be directly recycled, and the acid consumption per ton of steel can be greatly reduced under the condition of an acid regeneration station;
2. the high-pressure pre-rinsing technology is adopted, so that high-concentration acid liquor on the surface of the strip can be removed to the greatest extent, more acid liquor can be recycled, and consumption of new water in a subsequent rinsing section can be reduced;
3. the acid water material balance is utilized to dynamically adjust the flow and the concentration of regenerated acid which is supplemented into the acid tank, so that the concentration of the acid tank can be ensured to be stable under the condition of continuously collecting pre-rinsing water;
4. The low-concentration rinsing wastewater is firstly discharged to the acid mist purifying tower for secondary utilization, and finally the generated acid-containing wastewater is directly discharged to the wastewater treatment station, so that the new water consumption of the acid mist purifying tower is reduced, and the rinsing wastewater is prevented from being transferred from the acid regeneration station, thereby reducing the energy consumption.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A process for reducing acid consumption in cold rolling of acid, for reducing acid consumption in a rinse stage after pickling of strip, comprising the steps of:
S1, after pickling in a final-stage acid tank, a continuously running strip is squeezed by a squeezing roller in the final-stage acid tank, and then pre-cleaned by a pre-rinsing spray pipe, wherein acid liquor squeezed by the squeezing roller, acid liquor thrown out by the squeezing roller at high speed and acid liquor flushed from the surface of the strip by the pre-rinsing spray pipe fall into the final-stage acid tank, and flow back into an acid tank in a gravity flow mode, are mixed with acid liquor in the acid tank, and are pumped out by an acid pump and re-injected into the final-stage acid tank to pickle the strip;
S2, the strip is output from the last-stage acid tank and enters a multi-stage rinsing tank for rinsing, the strip sequentially enters a first-stage rinsing tank to a last-stage rinsing tank, the surface of the strip is rinsed in the first-stage rinsing tank through a first-stage rinsing spray pipe, rinsing water falls into the first-stage rinsing tank, and after the rinsing water is pumped out and pressurized by a first-stage rinsing circulating pump, the surface of the strip is rinsed again through the first-stage rinsing spray pipe until the strip exits the last-stage rinsing tank; the rinsing water in the first-stage rinsing tank finally continuously flows into the acid mist purifying tower through the overflow pipeline.
2. The process according to claim 1, characterized in that: the rinsing water of the multistage rinsing tank flows from the rear section to the front section in a trapezoid manner.
3. The process according to claim 1, characterized in that: acid-containing wastewater generated after acid mist is circularly absorbed in the acid mist purifying tower is periodically discharged to a wastewater treatment station for treatment through a wastewater pump.
4. The process according to claim 1, characterized in that: and dynamically adjusting the flow and concentration of the regenerated acid which is supplemented into the acid tank by using acid water material balance.
5. The utility model provides a reduce equipment that cold rolling acidizing fluid consumed, includes multistage pickling tank and multistage rinsing tank that sets up in proper order along strip advancing direction, its characterized in that: a squeezing roller and a pre-rinsing spray pipe positioned at the rear section of the squeezing roller are arranged in an end acid tank of the multi-section acid tank, a spray head for flushing the front and back sides of the strip is arranged on the pre-rinsing spray pipe, the pre-rinsing spray pipe is connected with a high-pressure pump, the end acid tank is connected with an acid tank through a pipeline, and the acid tank pumps acid washing liquid into the end acid tank through an acid pump; the device is characterized in that a first-stage rinsing tank of the multi-stage rinsing tank is internally provided with a first-stage rinsing spray pipe, the first-stage rinsing spray pipe is provided with a spray head for carrying out first-stage rinsing on the front surface and the back surface of the strip, rinsing liquid in the first-stage rinsing tank is connected with the first-stage rinsing spray pipe through a first-stage rinsing circulating pump, the first-stage rinsing tank is also connected with an acid mist purifying tower, and the acid mist purifying tower is connected with a wastewater treatment station.
6. The apparatus according to claim 5, wherein: the first-stage rinsing tank is provided with an overflow pipeline, and rinsing water in the first-stage rinsing tank flows into the acid mist purifying tower through the overflow pipeline.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122790.7A CN113774397B (en) | 2021-09-24 | 2021-09-24 | Process and equipment for reducing consumption of cold-rolled acid liquor |
| PCT/CN2022/112394 WO2023045618A1 (en) | 2021-09-24 | 2022-08-15 | Process and device for reducing consumption of cold-rolling acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122790.7A CN113774397B (en) | 2021-09-24 | 2021-09-24 | Process and equipment for reducing consumption of cold-rolled acid liquor |
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| Publication Number | Publication Date |
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| CN113774397A CN113774397A (en) | 2021-12-10 |
| CN113774397B true CN113774397B (en) | 2024-07-23 |
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| CN202111122790.7A Active CN113774397B (en) | 2021-09-24 | 2021-09-24 | Process and equipment for reducing consumption of cold-rolled acid liquor |
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| Country | Link |
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| CN (1) | CN113774397B (en) |
| WO (1) | WO2023045618A1 (en) |
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| CN113774397B (en) * | 2021-09-24 | 2024-07-23 | 中冶南方工程技术有限公司 | Process and equipment for reducing consumption of cold-rolled acid liquor |
| CN114835170B (en) * | 2022-06-06 | 2023-11-28 | 湖南华菱涟钢特种新材料有限公司 | Production process of low-calcium-content ferric oxide powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216514158U (en) * | 2021-09-24 | 2022-05-13 | 中冶南方工程技术有限公司 | Equipment for reducing cold rolling acid liquor consumption |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2468659A1 (en) * | 1979-10-26 | 1981-05-08 | Clesid Sa | Continuous acid pickling plant for steel strip - where min. amt. of rinsing water is used to wash strip surface after pickling |
| DE69406396T2 (en) * | 1993-11-30 | 1998-05-28 | Danieli Off Mecc | Process for returning material to be treated in surface treatments and finishing operations |
| FR2721328B1 (en) * | 1994-06-15 | 1996-09-06 | Ugine Sa | Process for pickling metallic materials, in particular alloy steel, stainless steel or titanium alloy, with a solution of the type containing ferric ions in an acid medium. |
| CN102634810A (en) * | 2011-02-14 | 2012-08-15 | 张家港市艾尔环保设备有限公司 | Closed acid-washing bed |
| CN104888597A (en) * | 2015-06-03 | 2015-09-09 | 江苏兴隆防腐设备有限公司 | Acid mist purifying system of push-pull type pickling line |
| CN205275709U (en) * | 2015-12-18 | 2016-06-01 | 中冶南方工程技术有限公司 | Stainless steel pickling nitration mixture descaling bath |
| CN110820001A (en) * | 2019-11-30 | 2020-02-21 | 日照宝华新材料有限公司 | Control method and equipment for reducing acid loss and iron loss in acid pickling process |
| CN212640621U (en) * | 2020-05-05 | 2021-03-02 | 中冶南方工程技术有限公司 | Steel strip mixed acid pickling system |
| CN113774397B (en) * | 2021-09-24 | 2024-07-23 | 中冶南方工程技术有限公司 | Process and equipment for reducing consumption of cold-rolled acid liquor |
-
2021
- 2021-09-24 CN CN202111122790.7A patent/CN113774397B/en active Active
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2022
- 2022-08-15 WO PCT/CN2022/112394 patent/WO2023045618A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216514158U (en) * | 2021-09-24 | 2022-05-13 | 中冶南方工程技术有限公司 | Equipment for reducing cold rolling acid liquor consumption |
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| Publication number | Publication date |
|---|---|
| CN113774397A (en) | 2021-12-10 |
| WO2023045618A1 (en) | 2023-03-30 |
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