CN111850233A - Recovery process of stainless steel pickling residues - Google Patents
Recovery process of stainless steel pickling residues Download PDFInfo
- Publication number
- CN111850233A CN111850233A CN202010756472.5A CN202010756472A CN111850233A CN 111850233 A CN111850233 A CN 111850233A CN 202010756472 A CN202010756472 A CN 202010756472A CN 111850233 A CN111850233 A CN 111850233A
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- stainless steel
- residues
- pickling
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- drying
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/16—Mills provided with vibrators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- 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
- C23G1/36—Regeneration of waste pickling liquors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A recovery process of stainless steel pickling residues comprises the following steps: A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished; B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area; C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying; D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues; E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.
Description
Technical Field
The invention relates to the technical field of stainless steel, in particular to a recovery process of stainless steel pickling residues.
Background
The stainless steel has black and yellow scale during processing, and the processed stainless steel needs to be subjected to pickling passivation treatment in order to improve the appearance and corrosion resistance of the stainless steel. The oxide skin generated after welding and high-temperature processing is removed, so that the oxide skin is silvery and bright, and a layer of oxide film taking chromium as a main substance is formed on the surface after processing, secondary oxygen corrosion is not generated, and the passivation purpose is achieved, so that the surface corrosion resistance quality of the stainless steel product is improved, and the service life of equipment is prolonged.
The stainless steel pickling is generally carried out by adopting pickling passivation paste and pickling passivation solution, the pickling passivation paste synchronously carries out pickling and passivation and is completed in one step, the traditional pickling and passivation process is changed, and the method is simple to operate, convenient to construct and low in cost. Is suitable for large-area painting operation. The pickling passivation solution is suitable for soaking operation of small workpieces.
The conventional chemical precipitation method is adopted in the common treatment process of the pickling wastewater, and lime is used as a neutralizing agent to treat the wastewater. The method has the advantage that pollutants in the sewage can be well removed through the physical and chemical properties of the lime. However, since such waste water contains a relatively high fluoride content and in many cases contains sulfuric acid and sulfate, there are major problems in that a large amount of sludge such as calcium fluoride and precipitation of hydrated calcium sulfate are generated, and at the same time, the interstitial water content of calcium sulfate crystals is high, further increasing the amount of sludge. The production amount of the sludge is greatly increased, the grade of heavy metal nickel and the like is inevitably low, most of the nickel and the like can not be recycled, and the resource waste is caused. And the sludge containing metals such as nickel, chromium and the like belongs to dangerous waste, so that the environment is seriously polluted, and huge environmental protection expenditure is brought to enterprises due to higher disposal cost.
In addition, the current common method is anti-seepage landfill treatment aiming at the heavy metal contained in the stainless steel pickling paste for pickling, but the passive treatment mode does not fundamentally solve the problem, still has the hidden trouble of environmental pollution, and simultaneously needs to occupy land resources for landfill.
Therefore, the prior art lacks a technical means for effectively recycling and treating the sewage after stainless steel pickling or cleaning.
Disclosure of Invention
The purpose of the invention is as follows:
in order to overcome the defects in the background art, the embodiment of the invention provides a recovery process of stainless steel pickling residues, which can effectively solve the problems related to the background art.
The technical scheme is as follows:
a recovery process of stainless steel pickling residues comprises the following steps:
A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished;
B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area;
C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying;
D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues;
E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.
As a preferred mode of the invention, the process further comprises the steps of:
F. starting a circulating filter device in the pickling tank by controlling to circularly filter the pickling solution in the pickling tank to obtain filtered pickling solution residues;
G. conveying the filtered pickling solution residues to a drying area, drying the filtered pickling solution residues through a drying device, and conveying the pickling solution residues to a vibration crushing area after drying is completed;
H. carrying out vibration crushing on the dried pickle residue through a vibration crushing device, and guiding the pickle residue into a screening area after the vibration crushing is finished;
I. magnetically screening the pickling solution residues through a magnetic adsorption device to obtain magnetically adsorbed pickling solution metal residues;
J. and guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the pickling solution metal residues, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recovery.
In a preferred embodiment of the present invention, the method of transporting the stainless steel taken out to a brushing area for cleaning comprises:
shot blasting is carried out on the stainless steel through a freezing trimmer; and
and carrying out ultrasonic cleaning on the stainless steel through an ultrasonic cleaning tank.
As a preferred mode of the invention, the process further comprises:
and transporting the stainless steel subjected to the cleaning treatment to a finished product placing area.
As a preferred mode of the invention, the process further comprises:
guiding the residual liquid after the circular filtration in the pickling tank to an inspection area;
and (4) carrying out discharge standard inspection on the residual liquid after the circular filtration through a wastewater discharge standard inspection device, discharging the residual liquid when the residual liquid is qualified, and otherwise, refluxing the residual liquid into the pickling tank for continuous circular filtration.
The invention realizes the following beneficial effects:
1. the stainless steel cleaning device can dry sewage after stainless steel cleaning is finished, stainless steel residues are obtained, the stainless steel residues are magnetically screened, the residual stainless steel non-metal residues after magnetic screening are smelted and decomposed, and the stainless steel metal residues which are magnetically adsorbed are led into the second smelting furnace to be smelted and recovered, so that the stainless steel cleaning sewage can be effectively recycled by materials, and the recovery efficiency is improved.
2. The invention can circularly filter the pickling solution to obtain the filtered pickling solution residues, perform vibration crushing on the pickling solution residues, perform magnetic screening on the pickling solution residues after vibration crushing, further perform smelting decomposition on the residual pickling solution non-metal residues after magnetic screening, and introduce the magnetically adsorbed pickling solution metal residues into the second smelting furnace for smelting recovery, thereby effectively performing material-based recovery treatment on the sewage after stainless steel pickling and improving the recovery efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a flow chart of a process for recycling stainless steel pickling residues according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a recycling process of stainless steel pickling residues according to a second embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments; in the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure; one skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc.; in other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Example one
Referring to fig. 1, the present embodiment provides a recycling process of stainless steel pickling residues, comprising the following steps:
A. and (4) pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished.
Pouring pickling solution into a pickling tank, then putting the stainless steel to be pickled into the pickling tank for pickling, and taking out the pickled stainless steel after a certain time is reached; both the introduction and removal of stainless steel can be performed using automated equipment, such as a programmed robotic arm.
B. And conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area.
The transport operation in this embodiment can be executed by the AGV, that is, the above-mentioned mechanical arm takes out the stainless steel after the pickling, and puts it into the AGV, and the AGV transports the stainless steel after the pickling to the scrubbing area according to the set route for cleaning.
In this embodiment, the stainless steel taken out is transported to a brushing area for cleaning, and the adopted treatment method includes: shot blasting is carried out on the stainless steel through a freezing trimmer; and carrying out ultrasonic cleaning on the stainless steel through an ultrasonic cleaning tank.
After the AGV transports the pickled stainless steel to the scrubbing area according to a set route, the stainless steel is thrown into a freezing edge trimming machine through a mechanical arm arranged in the scrubbing area, the freezing edge trimming machine is opened, liquid nitrogen shot blasting treatment is carried out on the stainless steel in the bin door, the bin door is opened after the shot blasting is finished, and the stainless steel after the shot blasting is finished is thrown into an ultrasonic cleaning tank through the mechanical arm in the scrubbing area to carry out ultrasonic cleaning on the stainless steel.
After the stainless steel is washed, sewage in the washing area is guided into the drying area through a water pipe, a water tank is specifically arranged in the drying area, the water pipe is arranged between the water tank and the ultrasonic cleaning tank, an automatic valve is arranged on the water pipe, and the sewage in the washing area is guided into the water tank of the drying area by controlling the opening of the valve.
C. And (4) drying the sewage through a drying device and conveying the stainless steel residues to a screening area after drying.
Drying device specifically can set up in the pond top, and after sewage got into the pond, control drying device opened and carries out drying process in order to the sewage in the pond, and after the stoving, the residue of the sewage after will drying through residue collection device is collected to transport to screening district through AGV.
D. And magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues.
The magnetic adsorption device is arranged in the screening area, and can adsorb metal materials after being started, so that metal residues in the stainless steel residues are adsorbed, and the non-adsorbed stainless steel residues are non-metal residues.
E. And (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.
And guiding the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition by an AGV, and guiding the stainless steel metal residues into a second smelting furnace for smelting recovery.
Through the implementation of the above content, sewage after cleaning the stainless steel can be dried, stainless steel residues are obtained, magnetic screening is carried out on the stainless steel residues, then the residual stainless steel non-metal residues after the magnetic screening are smelted and decomposed, and the stainless steel metal residues subjected to magnetic attraction are guided into the second smelting furnace to be smelted and recovered, so that the sewage after cleaning the stainless steel can be effectively subjected to material recovery treatment, and the recovery efficiency is improved.
As a preferable aspect of this embodiment, the process further includes: the stainless steel after being cleaned is transported to a finished product placing area, and automatic transportation can be carried out through an AGV according to a set route.
Example two
Referring to fig. 2, in this embodiment, the process further includes the following steps:
F. the pickling solution in the pickling tank is circularly filtered by controlling the starting of a circulating filter device in the pickling tank, so that the filtered pickling solution residues are obtained.
G. And (3) conveying the filtered pickling solution residues to a drying area, drying the filtered pickling solution residues through a drying device, and conveying the pickling solution residues to a vibration crushing area after drying is completed.
After the circulation filtration is finished, the pickling solution residues after the circulation filtration is finished are collected through a residue collecting device and are transported to a movable crushing area through an AGV.
H. And (4) vibrating and crushing the dried pickling solution residues through a vibrating and crushing device, and guiding the pickled solution residues into a screening area after the vibrating and crushing are finished.
The pickling solution residue is conveyed to a vibrating screen of the vibrating smashing device, then the vibrating smashing device is started to vibrate and smash the pickling solution residue on the vibrating screen, the pickling solution residue after vibrating smashing is collected through a residue collecting device after vibrating smashing is finished, and the pickling solution residue is conveyed to a screening area through an AGV.
I. And magnetically screening the pickling solution residues by using a magnetic adsorption device to obtain the magnetically adsorbed pickling solution metal residues.
And starting a magnetic adsorption device arranged in the screening area, so as to adsorb the metal material, further adsorb the metal residues in the pickling solution residues, and if the metal residues are not adsorbed, the non-metal residues are the pickling solution residues.
J. And guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the pickling solution metal residues, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recovery.
Guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposing by an AGV, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recycling.
Through the implementation of the above contents, the pickling solution can be subjected to circulating filtration, the filtered pickling solution residues are obtained, the pickling solution residues are subjected to vibration crushing, the vibration crushed pickling solution residues are subjected to magnetic screening, then the residual pickling solution non-metal residues after the magnetic screening are smelted and decomposed, and the magnetically adsorbed pickling solution metal residues are led into the second smelting furnace to be smelted and recovered, so that the sewage after the stainless steel pickling can be effectively subjected to material-based recovery treatment, and the recovery efficiency is improved.
As a preferable aspect of this embodiment, the process further includes:
guiding the residual liquid after the circular filtration in the pickling tank to an inspection area; and (4) carrying out discharge standard inspection on the residual liquid after the circular filtration through a wastewater discharge standard inspection device, discharging the residual liquid when the residual liquid is qualified, and otherwise, refluxing the residual liquid into the pickling tank for continuous circular filtration.
Specifically, set up a basin in the inspection district, be connected with the water pipe between descaling bath and basin, be provided with automatic control's valve on the water pipe, control valve opens the back, then pours the surplus liquid in the descaling bath into the basin in inspection district, then through the surplus liquid after waste water emission standard verifying attachment to the loop filter, the liquid in the basin carries out emission standard inspection promptly, whether the inspection satisfies the emission standard of sewage promptly, discharge it if the inspection is qualified, otherwise continue loop filter in its backward flow to the descaling bath.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The recovery process of the stainless steel pickling residues is characterized by comprising the following steps:
A. pickling the processed stainless steel through a pickling tank, and taking out the stainless steel after the pickling is finished;
B. conveying the taken stainless steel to a brushing area for cleaning treatment, and then guiding the sewage in the brushing area to a drying area;
C. drying the sewage by a drying device, and transporting the stainless steel residues to a screening area after drying;
D. magnetically screening the stainless steel residues through a magnetic adsorption device to obtain the magnetically adsorbed stainless steel metal residues;
E. and (3) introducing the residual stainless steel non-metal residues after magnetic screening into a first smelting furnace for smelting decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the stainless steel metal residues, and introducing the stainless steel metal residues into a second smelting furnace for smelting recovery.
2. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises the steps of:
F. starting a circulating filter device in the pickling tank by controlling to circularly filter the pickling solution in the pickling tank to obtain filtered pickling solution residues;
G. conveying the filtered pickling solution residues to a drying area, drying the filtered pickling solution residues through a drying device, and conveying the pickling solution residues to a vibration crushing area after drying is completed;
H. carrying out vibration crushing on the dried pickle residue through a vibration crushing device, and guiding the pickle residue into a screening area after the vibration crushing is finished;
I. magnetically screening the pickling solution residues through a magnetic adsorption device to obtain magnetically adsorbed pickling solution metal residues;
J. and guiding the residual pickling solution non-metal residues after magnetic screening into a first smelting furnace for smelting and decomposition, controlling an electromagnetic adsorption device to remove the magnetic adsorption of the pickling solution metal residues, and guiding the pickling solution metal residues into a second smelting furnace for smelting and recovery.
3. The process of claim 1, wherein the step of transporting the stainless steel to a scrubbing section for cleaning comprises: shot blasting is carried out on the stainless steel through a freezing trimmer; and carrying out ultrasonic cleaning on the stainless steel through an ultrasonic cleaning tank.
4. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises: and transporting the stainless steel subjected to the cleaning treatment to a finished product placing area.
5. The process for recovering stainless steel pickling residues as claimed in claim 1, wherein the process further comprises: guiding the residual liquid after the circular filtration in the pickling tank to an inspection area;
and (4) carrying out discharge standard inspection on the residual liquid after the circular filtration through a wastewater discharge standard inspection device, discharging the residual liquid when the residual liquid is qualified, and otherwise, refluxing the residual liquid into the pickling tank for continuous circular filtration.
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| CN202010756472.5A CN111850233A (en) | 2020-07-31 | 2020-07-31 | Recovery process of stainless steel pickling residues |
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| CN113058920A (en) * | 2021-04-30 | 2021-07-02 | 无锡金羊管件有限公司 | Multifunctional steel cleaning and sorting equipment |
| CN113275360A (en) * | 2021-05-06 | 2021-08-20 | 浙江特力再生资源股份有限公司 | Method for recycling waste acid sludge resources generated in stainless steel industry |
| CN113772739A (en) * | 2021-09-14 | 2021-12-10 | 周丹丹 | Clean production method for recovering iron chromium powder from stainless steel pickling wastewater and waste liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113275360A (en) * | 2021-05-06 | 2021-08-20 | 浙江特力再生资源股份有限公司 | Method for recycling waste acid sludge resources generated in stainless steel industry |
| CN113772739A (en) * | 2021-09-14 | 2021-12-10 | 周丹丹 | Clean production method for recovering iron chromium powder from stainless steel pickling wastewater and waste liquid |
| CN113772739B (en) * | 2021-09-14 | 2024-04-12 | 周丹丹 | Clean production method for recycling iron-chromium powder from stainless steel pickling wastewater and waste liquid |
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Application publication date: 20201030 |