CN108096876A - Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot - Google Patents
Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot Download PDFInfo
- Publication number
- CN108096876A CN108096876A CN201711146904.5A CN201711146904A CN108096876A CN 108096876 A CN108096876 A CN 108096876A CN 201711146904 A CN201711146904 A CN 201711146904A CN 108096876 A CN108096876 A CN 108096876A
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- CN
- China
- Prior art keywords
- phosphoric acid
- stainless steel
- acid extraction
- extraction slot
- inhibiting corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/46—Preparation involving solvent-solvent extraction
-
- 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
- C23G1/088—Iron or steel solutions containing organic acids
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention belongs to anticorrosion technique fields, top method of inhibiting corrosion in especially a kind of phosphoric acid extraction slot, including pre-buried, sandblasting, brushing, polishing and lining totally 5 processes, by will treated that 316L stainless steels are embedded in is pushed up in phosphoric acid extraction slot in mixed mud and be used as easy access and repair base, be not required to consider its concrete containing lowering service life to the reduction of erosion resistant coating adhesive strength after acid；Furthermore after blasting treatment, its roughness is made to meet D3P adhesive strengths so that resistance to temp effect reaches 180 DEG C, and improves the resistance to corrosion to various nitration mixture in extraction tank, extends the service life of extraction tank, and cost also remains basically stable with liner rubber；In addition, by being used as reinforcement protection layer in one layer of pre-vulcanized butyl rubber of surface lining, stress variation is avoided to cause drawing crack to D3P materials, the phenomenon that so as to avoid overhauling every year.
Description
Technical field
The invention belongs to anticorrosion technique field, top method of inhibiting corrosion in especially a kind of phosphoric acid extraction slot.
Background technology
Phosphoric acid extraction slot is reinforced concrete structure, is the reaction vessel of sulfuric acid and phosphorus ore, the device is during the reaction
With the presence of a variety of nitration mixture such as phosphoric acid, sulfuric acid, hydrogen fluoride, thus it is larger to the corrosion strength of groove body；Particularly groove top is away from reaction material
Starch Level 1m or so, high spatial is interior to have the gases such as reaction heat, foam skin, the hydrogen fluoride largely generated during the reaction, instead
External force that is inconsistent, forming destruction bonding should be expanded between heat meeting rubber slab and mixed mud, it is incomplete that foam can carry reaction
Concentrated sulfuric acid contact rubber slab causes offset plate aging；Hydrogen fluoride gas siltation forms silica gel in printing on surface of rubber plate, and accumulation is more can be by
Equally offset plate can be bonded to form destructive power in gravity, therefore in order to reduce corrosiveness, by stringent slurry level, ensure it is anti-
It hot should in time remove, reduce hydrogen fluoride gas siltation volume and addition antifoaming agent etc., but effect is unsatisfactory, and can also cause
Manpower and materials increase, and process costs improve, and technique becomes the problems such as cumbersome.
At present, phosphoric acid extraction trench bottom mainly uses liner prevulcanized rubber as antiseepage, anti-corrosion layer, and be usually coated graphite impregnation
Carbon brick is wear-resisting, thermal insulation layer, and top uses presulfurization offset plate as erosion resistant coating, although can improve anticorrosive property to a certain extent
Can, but its resistance to temp effect in 85 DEG C or so environment is bad, binding agent is susceptible to gluing, rises in the environment for a long time
Bubble, aging, especially acid adding area moment exothermic temperature up to 150 DEG C be even more rubber challenge, corrosion it is more rapid, add
Sour gas or medium enter concrete after rubber corrosion, reduce concrete strength, overhaul adhesive strength progressively after aobvious acidity
Reduce, service life is shorter and shorter, seriously affects production Homes Using TV, so as to reduce yield, causes economic loss.
The content of the invention
In order to solve the above technical problems, the present invention provides top method of inhibiting corrosion in a kind of phosphoric acid extraction slot.
It is achieved particular by following technical scheme：
Top method of inhibiting corrosion, comprises the following steps in a kind of phosphoric acid extraction slot：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 4-8mm are pushed up in phosphoric acid extraction slot.
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and smears a layer thickness as 3~5mm
Thick D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl for being 3~5mm in surface lining a layer thickness of resulting materials is answered
Close rubber；
Top method of inhibiting corrosion, comprises the following steps in above-mentioned phosphoric acid extraction slot：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 6mm are pushed up in phosphoric acid extraction slot.
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and it is thick for 4mm to smear a layer thickness
D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl for being 4mm in surface lining a layer thickness of resulting materials is compound
Rubber；
The cleaning agent raw material by weight percentage for dodecyl sulphate diethanol amine 5~10%, sodium molybdate 3~
5%th, lauryl sodium sulfate 10~20%, citric acid 3~7%, propylene glycol 5~10%, disodium hydrogen phosphate 2~5%, surplus are
Water.
During the step (2) is smeared, D3P points of 3 smearings, and smeared after smearing and smear for second in first time
The surface covering polyester fiber cloth at position.
The roughness of step (1) stainless steel is 90 μm.
The stainless steel is 316L stainless steels.
The D3P is modified clay for polymer rubber.
Advantageous effect
Top method of inhibiting corrosion in phosphoric acid extraction slot of the present invention, including pre-buried, sandblasting, smearing, polishing and lining totally 5 works
Sequence, by will treated that 316L stainless steels are embedded in is pushed up in phosphoric acid extraction slot in mixed mud and be used as easy access repairing base,
It is not required to consider that its concrete reduces erosion resistant coating adhesive strength to lower service life after containing acid；Furthermore pass through blasting treatment
Afterwards, its roughness is made to meet D3P adhesive strengths so that resistance to temp effect reaches 180 DEG C, and improves to various nitration mixture in extraction tank
Resistance to corrosion, extend the service life of extraction tank, cost also remains basically stable with liner rubber；In addition, by being served as a contrast on surface
In one layer of pre-vulcanized butyl rubber as reinforcement protection layer, stress variation is avoided to cause drawing crack to D3P materials, so as to avoid a year annual test
The phenomenon that repairing.
The present invention program has the following advantages：It 1. can the long-time service within 150 DEG C of liquid and gas phase temperature；It 2. can
With the long-time service in extraction tank mixing sour gas；3. it can not have to reduce after considering its concrete containing acid in maintenance to use
Service life；It 4. can the long-time service in the case where production technology index is unstable；5. production yields can be improved significantly, reduce
Machine stop times.
Specific embodiment
Tuberculosis specific embodiment is limited technical scheme is further below, but claimed
Scope is not only limited to made description.
Embodiment 1
Top method of inhibiting corrosion, comprises the following steps in a kind of phosphoric acid extraction slot：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 4mm are pushed up in phosphoric acid extraction slot；
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and it is thick for 3mm to smear a layer thickness
D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl for being 4mm in surface lining a layer thickness of resulting materials is compound
Rubber.
The cleaning agent raw material is by weight percentage dodecyl sulphate diethanol amine 5%, sodium molybdate 3%, 12
Sodium alkyl sulfate 10%, citric acid 3%, propylene glycol 5%, disodium hydrogen phosphate 2%, surplus are water.
During the step (2) is smeared, D3P points of 3 smearings, and smeared after smearing and smear for second in first time
The surface covering polyester fiber cloth at position.
The stainless steel is 316L stainless steels.
Embodiment 2
Top method of inhibiting corrosion, comprises the following steps in a kind of phosphoric acid extraction slot：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 8mm are pushed up in phosphoric acid extraction slot；
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and it is thick for 4mm to smear a layer thickness
D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl for being 4mm in surface lining a layer thickness of resulting materials is compound
Rubber.
The cleaning agent raw material is by weight percentage dodecyl sulphate diethanol amine 10%, sodium molybdate 5%, 12
Sodium alkyl sulfate 20%, citric acid 7%, propylene glycol 10%, disodium hydrogen phosphate 5%, surplus are water.
During the step (2) is smeared, D3P points of 3 smearings, and smeared after smearing and smear for second in first time
The surface covering polyester fiber cloth at position.
The stainless steel is 316L stainless steels.
Embodiment 3
Top method of inhibiting corrosion, comprises the following steps in a kind of phosphoric acid extraction slot：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 6mm are pushed up in phosphoric acid extraction slot；
(2) sandblasting：Stainless steel is subjected to blasting treatment, the roughness for making stainless steel is 90 μm；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and it is thick for 5mm to smear a layer thickness
D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl for being 4mm in surface lining a layer thickness of resulting materials is compound
Rubber.
The cleaning agent raw material is by weight percentage dodecyl sulphate diethanol amine 8%, sodium molybdate 4%, 12
Sodium alkyl sulfate 15%, citric acid 6%, propylene glycol 7%, disodium hydrogen phosphate 4%, surplus are water.
During the step (2) is smeared, D3P points of 3 smearings, and smeared after smearing and smear for second in first time
The surface covering polyester fiber cloth at position.
The stainless steel is 316L stainless steels.
It is important to point out that, above example and test example are only limitted to do further technical scheme herein
Elaboration and understanding, it is impossible to be interpreted as further to technical scheme and limited, what those skilled in the art made
Non-protruding essential characteristics and the innovation and creation of marked improvement still fall within the protection category of the present invention.
Claims (6)
1. top method of inhibiting corrosion in a kind of phosphoric acid extraction slot, which is characterized in that comprise the following steps：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours are pushed up in phosphoric acid extraction slot, thickness is 4~8mm；
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and smears a layer thickness as 3~5mm thickness
D3P coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the compound rubber of presulfurization butyl for being 3~5mm in surface lining a layer thickness of resulting materials
Glue.
2. top method of inhibiting corrosion in phosphoric acid extraction slot as described in claim 1, which is characterized in that comprise the following steps：
(1) it is pre-buried：Pre-buried 316L stainless steel plates before mixed mud pours, thickness 6mm are pushed up in phosphoric acid extraction slot；
(2) sandblasting：Stainless steel is subjected to blasting treatment, makes roughness >=60 μm of stainless steel；
(3) coating：The stainless steel surface after sandblasting is cleaned using cleaning agent, and smears the D3P that a layer thickness is 4mm thickness
Coating；
(4) polish：The material that step 3) is obtained carries out cleaning polishing；
(5) lining：After polishing, the presulfurization butyl compounded rubber for being 4mm in surface lining a layer thickness of resulting materials.
3. top method of inhibiting corrosion in phosphoric acid extraction slot as claimed in claim 1 or 2, which is characterized in that the cleaning agent raw material
By weight percentage for dodecyl sulphate diethanol amine 5~10%, sodium molybdate 3~5%, lauryl sodium sulfate 10~
20%th, citric acid 3~7%, propylene glycol 5~10%, disodium hydrogen phosphate 2~5%, surplus are water.
4. top method of inhibiting corrosion in phosphoric acid extraction slot as claimed in claim 1 or 2, which is characterized in that the step (2) is smeared
In the process, D3P points of 3 smearings, and smearing the surface covering polyester fiber at position after first time smearing and second are smeared
Cloth.
5. top method of inhibiting corrosion in phosphoric acid extraction slot as claimed in claim 1 or 2, which is characterized in that the step (1) is stainless
The roughness of steel is 90 μm.
6. top method of inhibiting corrosion in phosphoric acid extraction slot as claimed in claim 1 or 2, which is characterized in that the stainless steel is
316L stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146904.5A CN108096876A (en) | 2017-11-17 | 2017-11-17 | Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146904.5A CN108096876A (en) | 2017-11-17 | 2017-11-17 | Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot |
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| CN108096876A true CN108096876A (en) | 2018-06-01 |
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| CN201711146904.5A Pending CN108096876A (en) | 2017-11-17 | 2017-11-17 | Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525339A (en) * | 2018-06-06 | 2018-09-14 | 贵州开磷集团矿肥有限责任公司 | A kind of phosphoric acid dodges the anticorrosion construction method of cooling system low level flash chamber |
| CN110155976A (en) * | 2019-04-11 | 2019-08-23 | 贵州开磷集团矿肥有限责任公司 | A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating |
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| JP2004345876A (en) * | 2003-05-20 | 2004-12-09 | Hayaji Shibata | Method for increasing purity in phosphoric acid aqueous solution |
| CN101219289A (en) * | 2007-01-12 | 2008-07-16 | 有研稀土新材料股份有限公司 | Mixed settler extractor |
| CN101274755A (en) * | 2008-04-18 | 2008-10-01 | 侯炎学 | Device for wet phosphoric acid refining and high-purity ammonium molybdate preparation |
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| CN202623429U (en) * | 2012-05-04 | 2012-12-26 | 湖北华宁防腐技术股份有限公司 | Compounded acid-proof anti-corrosion lining |
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-
2017
- 2017-11-17 CN CN201711146904.5A patent/CN108096876A/en active Pending
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|---|---|---|---|---|
| JP2004345876A (en) * | 2003-05-20 | 2004-12-09 | Hayaji Shibata | Method for increasing purity in phosphoric acid aqueous solution |
| CN101219289A (en) * | 2007-01-12 | 2008-07-16 | 有研稀土新材料股份有限公司 | Mixed settler extractor |
| CN101274755A (en) * | 2008-04-18 | 2008-10-01 | 侯炎学 | Device for wet phosphoric acid refining and high-purity ammonium molybdate preparation |
| CN101323541A (en) * | 2008-07-15 | 2008-12-17 | 秦绪友 | Novel ammophos production process |
| CN202623429U (en) * | 2012-05-04 | 2012-12-26 | 湖北华宁防腐技术股份有限公司 | Compounded acid-proof anti-corrosion lining |
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Non-Patent Citations (1)
| Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108525339A (en) * | 2018-06-06 | 2018-09-14 | 贵州开磷集团矿肥有限责任公司 | A kind of phosphoric acid dodges the anticorrosion construction method of cooling system low level flash chamber |
| CN110155976A (en) * | 2019-04-11 | 2019-08-23 | 贵州开磷集团矿肥有限责任公司 | A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating |
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Application publication date: 20180601 |