CN105643470A - Wet type steel strip acidless descaling technology and equipment of technology - Google Patents
Wet type steel strip acidless descaling technology and equipment of technology Download PDFInfo
- Publication number
- CN105643470A CN105643470A CN201610079162.8A CN201610079162A CN105643470A CN 105643470 A CN105643470 A CN 105643470A CN 201610079162 A CN201610079162 A CN 201610079162A CN 105643470 A CN105643470 A CN 105643470A
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- CN
- China
- Prior art keywords
- steel band
- sedimentation tank
- slurry
- wet type
- anacidity
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
- B24C3/083—Transfer or feeding devices; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
- B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
- B24C3/12—Apparatus using nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
Abstract
The invention discloses a wet type steel strip acidless descaling technology. A wet type slurry catapult is adopted to spray slurry to the surface of a steel strip during moving, and the slurry comprises one part of water and one part to three parts of solid particles; the included angle formed between the spraying direction of the wet type slurry catapult and the moving direction of the steel strip ranges from 105 degrees to 110 degrees, the spraying speed of the slurry ranges from 45m/s to 85m/s, and the spraying amount of the slurry ranges from 350 kg/min to 850 kg/min. The invention further discloses wet type steel strip acidless descaling equipment. The equipment comprises a lifting machine, a sand supply hopper, a distribution valve, the catapult, a cast chamber, a steel strip conveying device, a spiral water and sand separation device, a two-stage settling pond, a bottom valve, a high-pressure spraying pump and a hydrocyclone. By the adoption of the mechanical manner, the mixed slurry of the liquid and the particles is sprayed to the surface of a hot rolled steel rolling plate so as to achieve medium descaling, and therefore the aim of descaling of a treated plate roll surface is achieved. Under the buffer effect of water, the surface hardening, scratching and pulling after steel strip shot blasting treatment can be reduced, the technology and device are suitable for cold rolling, hot galvanizing and coating plate technology pretreatment, and meanwhile due to existence of water, the pollution of the dust to the environment is solved.
Description
Technical field
The present invention relates to a kind of steel band descaling process and equipment, particularly to a kind of wet type steel band anacidity descaling process and equipment thereof.
Background technology
Hot-strip scale on surface is generally made up of three-decker, and the superiors are red iron sesquioxide Fe2O3, i.e. rust layer, account for 2%, intermediate layer is magnetic ferroferric oxide Fe3O4, account for 18% and undermost wustite (mainly ferrous oxide FeO) account for 80%. Hot-strip iron scale thickness is generally 7.5-15 ��m, is steel base layer below iron scale. In the techniques such as cold rolling, galvanizing or coating, have been used up the pickling front road technique to steel hot-rolled coil surface used in the past and carry out de-scaling process. But the acidic materials adopting pickling processes technique are mordant, in operation personnel and equipment can be caused certain infringement, and cause serious environmental pollution, cause integrated operation maintenance cost higher.
Shot blasting processing device for steel plate surface disclosed in Chinese patent literature CN201659497U, belongs to dry method ball blast technique, and dry method ball blast technique is usually used in the sand removal of part, removes burr, raising intensity; The removing surface of structural member and rust cleaning; The occasions such as the removing surface of steel flat board and rust cleaning, are the process of surface treatment of a kind of extensive shape. Its shortcoming is: galled spots, pulls many, surface strength and increases to some extent; Surface anticorrosive process should be carried out immediately after surface treatment; In processing procedure, dust environmental pollution is serious.
The process of steel surface anacidity de-scaling disclosed in Chinese patent literature CN103878189A and descaling device, what adopt is broken de-scaling, steel brush machine and buffing machine and sand mill carry out surface treatment, and its shortcoming is also easily produce steel strip surface scratch or pull.
And the de-scaling of hot-rolled coil surface have to meet postchannel process requirement (such as techniques such as cold rolling, zinc-plated, coatings) after processing, de-scaling process after steel strip surface must not have hardening, abrade, the phenomenon such as pull and it needs to its flowing water adapting to continuous high speed (45m/min) runs operation system.
Summary of the invention
The present invention is to solve problem of the prior art, it is provided that a kind of wet type steel band anacidity descaling process, solve dry method ball blast technique and be easily generated galled spots, pull many, surface strength increases the problem that cannot adapt to follow-up cold-rolling process requirement to some extent. Present invention also offers wet type steel band anacidity de-scaling equipment, to meet the production requirement of wet type steel band anacidity descaling process.
Technical solution of the present invention is as follows: a kind of wet type steel band anacidity descaling process, adopt the wet slurry flinger injection slurry in surface to the steel band in motion, described slurry includes 1 weight parts water and 1-3 parts by weight solids granule, the injection direction of described wet slurry flinger and the direction of motion angle of described steel band are 105 ��-110 ��, described stock jet velocity is 45m/s-85m/s, and pulp jets amount is 350kg/min-850kg/min.
Preferably, two apparent surfaces of steel band are sprayed slurry by described wet slurry flinger in a symmetrical.
Preferably, described solid particle is steel sand, glass microballoon or ferrous oxide etc.
Preferably, the particle diameter of described solid particle is 0.3mm-0.8mm.
Preferably, the motion mode of described steel band is horizontal rectilinear motion or vertical straight line motion, and the direction of motion of described steel band is the length direction of steel band.
A kind of wet type steel band anacidity de-scaling equipment, including elevator, for sand hopper, distributing valve, flinger, impelling room, steel belt conveyer, spiral water sand separating apparatus, two-stage sedimentation tank, bottom valve, HP jetting pump and cyclone, described lift outlet is connected with for sand hopper, described confession sand hopper is mixed to form slurry for solid-liquid, described distributing valve is arranged at bottom described confession sand hopper and is connected to flinger, described flinger is arranged in pairs in the opposite sides of described steel belt conveyer and in the space that described impelling room surrounds, steel band is sprayed slurry, the bottom of described impelling room arranges discharge gate and is connected to described spiral water sand separating apparatus, the solids exit mouth of described spiral water sand separating apparatus is connected to described elevator, the liquid outlet opening of described spiral water sand separating apparatus is connected to described two-stage sedimentation tank, described bottom valve and HP jetting pump are arranged on the bottom of two-stage sedimentation tank, described HP jetting pump is connected to described cyclone, the outlet at bottom of described cyclone is connected to described for sand hopper, the top exit of described cyclone is connected to described two-stage sedimentation tank.
Preferably, the pulp jets direction of described flinger and the conveying direction angle of described steel belt conveyer are 105 ��-110 ��.
Further, described two-stage sedimentation tank includes the first order sedimentation tank and the second level sedimentation tank that are set up in parallel, between described first order sedimentation tank and second level sedimentation tank, overflow baffle is set, the liquid outlet opening of described spiral water sand separating apparatus is connected to described first order sedimentation tank, described bottom valve and HP jetting pump are arranged on the bottom of described first order sedimentation tank, and the top exit of described cyclone is connected to described second level sedimentation tank.
Further, described second level sedimentation tank is provided with degreasing unit, and described degreasing unit is oil removing plate or oil removing band.
The advantage of technical scheme provided by the present invention is in that, adopt mechanical system, scale medium by spraying the mixed slurry of liquid and granule to the surface of steel hot-rolled coil, thus scaling in the coiled sheet surface reaching to be processed, in whole production process, this technology is without using as acid harmful chemical, and floor space is little, environmental protection, low cost.Surface hardened layer after can reducing steel band Shot Blasting under the cushioning effect of water, abrade, pull, it is adaptable to cold-rolling process pre-treatment, simultaneously because the existence of water solves the dust pollution to environment. This technique is alternative acid cleaning process not only, protects environment, saves production cost, and can meet various such as the surface treatment requirement of high-grade structural member, shaped steel, colored black foundry goods etc.
Accompanying drawing explanation
Fig. 1 is present invention process schematic diagram.
Fig. 2 is flinger injection direction and steel band direction of motion angle schematic diagram.
Fig. 3 is apparatus of the present invention structural representation.
Fig. 4 is apparatus of the present invention schematic front view.
Fig. 5 is apparatus of the present invention schematic side view.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but not as a limitation of the invention.
Refer to Fig. 3 to Fig. 5, wet type steel band anacidity de-scaling equipment disclosed in the present embodiment, carries out elevator 1, confession sand hopper 2, distributing valve 3, flinger 4, impelling room 5, steel belt conveyer 6, spiral water sand separating apparatus 7, two-stage sedimentation tank 8, bottom valve 9, HP jetting pump 10 and the cyclone 11 set up including rack platform 12 and dependence rack platform 12. It is arranged on the top of rack platform 12 for sand hopper 2, becomes ball blast slurry with solid particle for mixing water. Solid particle selects particle diameter to be the steel sand of 0.3mm-0.8mm, glass microballoon or ferrous oxide, and water and solid particle are calculated as 1 1-3 by weight. For installing distributing valve 3 bottom sand hopper 2, the impelling room 5 of closing is set at the middle part of rack platform 12, the roof of impelling room 5 becomes to be in tilted layout with bottom surface, two flingers 4 are fixedly installed on roof and the bottom surface of impelling room 5, the injection direction of flinger 4 is towards the inside of impelling room 5, and distributing valve 3 outlet is connected to flinger 4 and injects the speed of flinger 4 for controlling ball blast slurry. Steel belt conveyer 6 is arranged in a horizontal manner and passes from the inside of impelling room 5, in order to reach desirable ball blast effect, two flingers 4 are arranged in the both sides up and down of steel belt conveyer 6 in a symmetrical, namely make two flingers 4 consistent to the steel band 13 upper and lower surface distance carried by steel belt conveyer 6, and the injection direction of flinger 4 is also consistent with steel band 13 direction of motion angle, this angle �� is 105 ��-110 ��. The bottom of impelling room 5 arranges discharge gate and is connected to spiral water sand separating apparatus 7, and the solids exit mouth of spiral water sand separating apparatus 7 is connected to elevator 1, and elevator 1 outlet is connected with for sand hopper 2. The liquid outlet opening of spiral water sand separating apparatus 7 is connected to the first order sedimentation tank 81 of two-stage sedimentation tank 8, is provided with second level sedimentation tank 82 side by side with first order sedimentation tank 81, arranges overflow baffle 83 between first order sedimentation tank 81 and second level sedimentation tank 82. The bottom of first order sedimentation tank 81 arranges bottom valve 9 and HP jetting pump 10, HP jetting pump 10 is connected to be arranged on the cyclone 11 for above sand hopper 2 by pipeline, the outlet at bottom of cyclone 11 is connected to for sand hopper 2, the top exit of cyclone 11 is connected to second level sedimentation tank 82, the mixed liquor in second level sedimentation tank 82 by sewage pump send into overanxious system carry out overanxious after be recirculated back to use.
In above-described embodiment, steel band is carried in horizontal rectilinear motion mode. Steel belt conveyer 6 can also be arranged in vertical mode, accordingly, two sidewalls of impelling room 5 and the conveying direction of steel belt conveyer 6 are that angle is arranged, two sidewalls that two flingers 4 are fixedly installed on impelling room 5 are arranged in the left and right sides of steel belt conveyer 6 in a symmetrical, and now steel band is with vertical straight line motion conveying.
The running engineering of this equipment is such, and in wet type anacidity dephosphorization process, water and solid particle enter in proportion and carry out mixed processing for sand hopper 2 and form ball blast slurry, subsequently into distributing valve 3 and be injected into each predetermined flinger 4. Solid particle can be selected for steel sand (ball), glass microballoon, ferrous oxide etc. according to handled workpiece material difference. The particle diameter of solid grain can adopt 0.3mm-0.8mm, and particle diameter is selected and can be selected according to required finished surface quality. Can being arranged in juxtaposition many set wet type steel band anacidity de-scaling equipments at same production line and carry out multistage Shot Blasting, can adopt greater particle size when primary spray is thrown, rear class can adopt less particle diameter to improve surface quality.
Flinger 4 is high speed rotating under the drive that can control variable speed electric motors, particularly, ball blast slurry delivers to entering pills apparatus hence into ball blast Zi Lun center by pneumatic tubing clip valve (control slurry flow), blade is entered by directed spout (controlling slurry impelling direction) ejection under certain effect spraying power, constantly accelerated until leaving by the blade of high speed rotating, ball blast slurry becomes predetermined angular, namely the injection direction of flinger 4 and steel band 13 direction of motion angle �� are 105 ��-110 ��, upper and lower surface with the steel band 13 that high speed fladellum directive is carried by steel belt conveyer 6, see Fig. 1 and Fig. 2, stock jet velocity is 45m/s-85m/s, pulp jets amount is 350kg/min-850kg/min, play the oxidation phosphorous layer removing steel band 13 surface, the effect of greasy dirt and various impurity. the mixture of slurry after injection, oxidation phosphorous layer, greasy dirt and various impurity is by entering spiral water sand separating apparatus 7 bottom impelling room 5, bottom the separated entrance elevator 1 of solid grain of about 90%, it is expelled to for sand hopper 2 thus elevated, circulates and so forth. the soiling solution mixture including metal-oxide, tiny sand grains and various foreign material after water sand separation carries out treatment for reuse through overfall inflow two-stage sedimentation tank 8.
In two-stage sedimentation tank 8, soiling solution mixture initially enters first order sedimentation tank 81 and utilizes density contrast to precipitate, when water level reach certain high time liquid cross overflow baffle 83 overflow and enter second level sedimentation tank 82, now in mixed liquor, impurities is all refuse. In second level sedimentation tank 82, greasy dirt swims in liquid surface, the heavy grain of part is deposited in bottom, fine oxide floats on a liquid. Swim in the oils and fats of the liquid surface of second level sedimentation tank 82, different degreasing units can be used to be removed by oil slick. Based on the total amount of oil slick, as less in oil mass can using oil removing plate, oil mass is more adopts oil removing band. As adopted vertical rotating oil removing plate, this will rotate disc portion and immerse among liquid. Oil slick can be attracted by rotating disk, is then passed to scraper plate, is removed by oils and fats with scraper plate, and direct plunges into wastebin. The operation principle of oil removing band is similar to the operation principle of oil removing plate, and oils and fats is attracted on oil belt surface, and the motion then as belt is seen off. The oils and fats on oil band removed by scraper plate, direct plunges into wastebin. Mixing soiling solution after deoiling is filtered by sewage pump suction pressure filter or entrance Full automatic back-flushing filtration system, and the clear liquid after filtration enters filtered water tank and recycles, and other solidss direct plunge into wastebin.
For the precipitation in first order sedimentation tank 81, can first opening the bottom valve 9 of first order sedimentation tank 81, start HP jetting pump 10, open feed water valve, water under high pressure enters HP jetting pump 10.Under hydrodynamic drive, the precipitation solid grain thing bottom first order sedimentation tank 81 mixes in HP jetting pump 10 and is transported to cyclone 11 and carries out cyclonic separation. Mixing liquid available solid grain after eddy flow to enter from the bottom of cyclone 11 for sand hopper 2, oxide, unavailable fine sand and major part liquid overflow into second level sedimentation tank 82 and are filtered processing by sewage pump feeding filtration system from the top of cyclone 11.
Claims (9)
1. a wet type steel band anacidity descaling process, it is characterized in that: adopt the wet slurry flinger injection slurry in surface to the steel band in motion, described slurry includes 1 weight parts water and 1-3 parts by weight solids granule, the injection direction of described wet slurry flinger and the direction of motion angle of described steel band are 105 ��-110 ��, described stock jet velocity is 45m/s-85m/s, and pulp jets amount is 350kg/min-850kg/min.
2. wet type steel band anacidity descaling process according to claim 1, it is characterised in that: two apparent surfaces of steel band are sprayed slurry by described wet slurry flinger in a symmetrical.
3. wet type steel band anacidity descaling process according to claim 1, it is characterised in that: described solid particle is steel sand, glass microballoon or ferrous oxide.
4. wet type steel band anacidity descaling process according to claim 1, it is characterised in that: the particle diameter of described solid particle is 0.3mm-0.8mm.
5. wet type steel band anacidity descaling process according to claim 1, it is characterised in that: the motion mode of described steel band is horizontal rectilinear motion or vertical straight line motion, and the direction of motion of described steel band is the length direction of steel band.
6. a wet type steel band anacidity de-scaling equipment, it is characterized in that: include elevator (1), for sand hopper (2), distributing valve (3), flinger (4), impelling room (5), steel belt conveyer (6), spiral water sand separating apparatus (7), two-stage sedimentation tank (8), bottom valve (9), HP jetting pump (10) and cyclone (11), described elevator (1) outlet is connected with for sand hopper (2), described confession sand hopper (2) is mixed to form slurry for solid-liquid, described distributing valve (3) is arranged at described confession sand hopper (2) bottom and is connected to flinger (4), described flinger (4) is arranged in pairs, in the opposite sides of described steel belt conveyer (6) and in the space that described impelling room (7) is surrounded, steel band (13) is sprayed slurry, the bottom of described impelling room (5) arranges discharge gate and is connected to described spiral water sand separating apparatus (7), the solids exit mouth of described spiral water sand separating apparatus (7) is connected to described elevator (1), the liquid outlet opening of described spiral water sand separating apparatus (7) is connected to described two-stage sedimentation tank (8), described bottom valve (9) and HP jetting pump (10) are arranged on the bottom of two-stage sedimentation tank (8), described HP jetting pump (10) is connected to described cyclone (11), the outlet at bottom of described cyclone (11) is connected to described for sand hopper, top (11) outlet of described cyclone is connected to described two-stage sedimentation tank (8).
7. wet type steel band anacidity de-scaling according to claim 6 equipment, it is characterised in that: the conveying direction angle of the pulp jets direction of described flinger (4) and described steel belt conveyer (6) is 105 ��-110 ��.
8. wet type steel band anacidity de-scaling according to claim 6 equipment, it is characterized in that: described two-stage sedimentation tank (8) includes the first order sedimentation tank (81) and the second level sedimentation tank (82) that are set up in parallel, between described first order sedimentation tank (81) and second level sedimentation tank (82), overflow baffle (83) is set, the liquid outlet opening of described spiral water sand separating apparatus (7) is connected to described first order sedimentation tank (81), described bottom valve (9) and HP jetting pump (10) are arranged on the bottom of described first order sedimentation tank (81), the top exit of described cyclone (11) is connected to described second level sedimentation tank (82).
9. wet type steel band anacidity de-scaling according to claim 8 equipment, it is characterised in that: described second level sedimentation tank (82) is provided with degreasing unit, and described degreasing unit is oil removing plate or oil removing band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610079162.8A CN105643470A (en) | 2016-02-04 | 2016-02-04 | Wet type steel strip acidless descaling technology and equipment of technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610079162.8A CN105643470A (en) | 2016-02-04 | 2016-02-04 | Wet type steel strip acidless descaling technology and equipment of technology |
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| CN105643470A true CN105643470A (en) | 2016-06-08 |
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| CN201610079162.8A Pending CN105643470A (en) | 2016-02-04 | 2016-02-04 | Wet type steel strip acidless descaling technology and equipment of technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180219A (en) * | 2016-09-18 | 2016-12-07 | 北京科技大学 | A kind of anacidity de-scaling produces supporting dedusting and cleaning plant |
| CN106826579A (en) * | 2017-03-14 | 2017-06-13 | 江苏鑫华能环保工程股份有限公司 | The continuous Shi Chu Scales mortars of Lian are prepared, separating circulating device |
| CN110629148A (en) * | 2019-11-14 | 2019-12-31 | 中冶赛迪工程技术股份有限公司 | Combined unit for continuously descaling and hot galvanizing hot rolled steel strip and production method thereof |
| CN111376175A (en) * | 2020-03-11 | 2020-07-07 | 中冶京诚工程技术有限公司 | Sand liquid circulation system of wet shot blasting |
| CN117434988A (en) * | 2023-12-18 | 2024-01-23 | 杭州金固环保设备科技有限公司 | Water balance control method, device and system |
| CN117434988B (en) * | 2023-12-18 | 2024-04-26 | 杭州泰恩智达装备科技有限公司 | Water balance control method, device and system |
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| CN106180219A (en) * | 2016-09-18 | 2016-12-07 | 北京科技大学 | A kind of anacidity de-scaling produces supporting dedusting and cleaning plant |
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| CN106826579A (en) * | 2017-03-14 | 2017-06-13 | 江苏鑫华能环保工程股份有限公司 | The continuous Shi Chu Scales mortars of Lian are prepared, separating circulating device |
| CN110629148A (en) * | 2019-11-14 | 2019-12-31 | 中冶赛迪工程技术股份有限公司 | Combined unit for continuously descaling and hot galvanizing hot rolled steel strip and production method thereof |
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| CN111376175B (en) * | 2020-03-11 | 2021-11-19 | 中冶京诚工程技术有限公司 | Sand liquid circulation system of wet shot blasting |
| CN117434988A (en) * | 2023-12-18 | 2024-01-23 | 杭州金固环保设备科技有限公司 | Water balance control method, device and system |
| CN117434988B (en) * | 2023-12-18 | 2024-04-26 | 杭州泰恩智达装备科技有限公司 | Water balance control method, device and system |
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