CN104593844A - Preparation method of cathode shield for super-thick open-cell foam iron nickel filter material - Google Patents
Preparation method of cathode shield for super-thick open-cell foam iron nickel filter material Download PDFInfo
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- CN104593844A CN104593844A CN201310525898.XA CN201310525898A CN104593844A CN 104593844 A CN104593844 A CN 104593844A CN 201310525898 A CN201310525898 A CN 201310525898A CN 104593844 A CN104593844 A CN 104593844A
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Abstract
A preparation method of a cathode shield for a super-thick open-cell foam iron nickel filter material. The method is as below: conducting conductive graphite glue coating or chemical nickel-plating on foam through hole sponge to obtain an electroplating cathode, and using pure iron plate or an alloy plate of iron and nickel in a certain proportion as an anode; conducting electroplating on cathode, anode and cathode shield plate in an electroplating solution containing ferrous chloride main salt or ferrous chloride and nickel chloride main salt; conducting heat treatment on the semi-finished product under reducing atmosphere / inert gas protection; and cutting the finished product according to the technical requirements. Compared with the prior art, the cathode shield provided by the invention realizes good deep plating and even plating, and forms the super-thick open-cell foam iron nickel filter material with good permeability, high filtration efficiency and low cost; super-thick open-cell foam iron nickel filter material has impurity content decreased by more than 20%, reaches oil smoke removal rate of 85%-94%, wind speed of 1.2 m/s and pressure loss lean than 20 Pa in application to foam iron nickel according to detection by the HJ / T762-2001 test method. Therefore, the cathode shield provided by the invention has obviously improved economic benefit and great market value.
Description
Technical field
The preparation method of a kind of super thick open celled foam of the present invention iron nickel filtering material cathode screen, what relate to is a kind of technical field of super thick open celled foam iron nickel filtering material, in particular to the electro-deposition preparation method of cathode screen, be applied to industrial dust, oil smoke mist of oil and metal casting, air purification filter.
Background technology
The filtering material adopted in industrial dust, oil smoke mist of oil and metal casting, air purification filter field is at present mainly wire cloth, fibrefelt or porous ceramics, there is the difficult problem that filtration efficiency and fluid cannot be optimized by property simultaneously more, and although foamed ceramics and usual foam nickel material all have the open-celled structure of three-dimensional high-permeability, but the former, and the slurry cast through holes rate that adopts is lower, the latter is mainly the slim foamed metal of battery (thickness is generally within 2 millimeters), filtration efficiency is lower, and range of application is limited.Japanese Patent 3303395B2 can prepare the nickel foam metallic substance of more than 10 millimeters, be mainly used in kitchen fume to filter, but pure iron metal cost is higher, quality is softer, and processing requirement proportion reaches close to 0.7g/cm3, the physical strength of material could be kept, thus strainer cost is raised.If improve preparation technology, the low-cost high-strength open cell foam metal of scale volume production material based on iron, possess good market expectations undoubtedly, and at present the electrodip process of ultra-thick foam iron nickel prepare a difficult problem be its deeply plating and dispersive ability poor, uneven coating is even and perishable, cause plating not thoroughly, large, the intensity difference of fragility, result causes conforming product rate low, is difficult to batch production.
Summary of the invention
The present invention is intended to overcome above-mentioned defect, to there is provided by the electro-deposition preparation method of cathode screen with iron as main material, realize tridimensional network, thickness reaches 3-50 millimeter, makes it have the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen that filtration efficiency is high, fluid is good by property, proportion is low, with low cost.
It is characterized in that: its preparation method is as follows,
1. using foam through hole sponge (urethane or polyethers) as skeleton base material, by coated with conductive graphite glue or chemical nickel plating, copper to after skeleton base material surface cleaning processing as electroplating cathode;
2. anode adopts the alloy sheets of pure iron plate or a certain proportion of iron, nickel;
3. negative electrode, anode be shelved on the main salt of iron protochloride or iron protochloride and the main salt of nickelous chloride, pH value 2.0-5, in the electroplating solution of temperature between 50-60 DEG C;
4. the sheet material of nonconducting PVC or PE of perforate is as cathode screen plate, the one side of laminating plating piece anode, and concentrated area electric current, electroplates;
5. the work in-process after plating, in the thermal treatment having reducing atmosphere/protection of inert gas, comprise oxidation, reduction two steps;
6. the finished product after thermal treatment carries out surfacing and deburring, carries out cutting by technical requirements;
Described heat treated temperature within the scope of 800-1100 DEG C, the time between 0.5-2H,
Described electroplating time between 0.5-2.5 H, voltage <5V,
Current density during described plating between 8A/dm2, pH value 2.0-2.5, temperature: 50-60 DEG C,
Described electroplating solution electroplating solution proportioning is: (in units of water: L) ferrous sulfate: 100-150g/L; Iron protochloride: 200-250 g/L
Described skeleton base material surface cleaning processing, is immerse to be less than in the conduction carbon paste of 20 ohm, repeatedly extrudes three times through pair roller, then heats to 120 degrees Celsius of oven dry 2 hours;
Described oxidation, is heated to 400 degrees Celsius by the product after galvanic deposit, 30 minutes time, oxidation removal sponge substrate;
Described reduction, puts into reduction furnace 950 degrees Centigrade by the test piece after removing sponge, injects hydrogen, nitrogen simultaneously, and be incubated gradient cooling after 6-7 hour, the time is 2-4 hour.
Implement the obvious advantage after this technology and effect is: compared with prior art, achieve good dark plating, all plate, form the super thick open celled foam iron nickel filtering material that permeability is good, filtration efficiency is high, with low cost, foreign matter content reduces more than 20%
,detect by HJ/T762-2001 test method, being applied to foam iron-nickel oil smoke clearance is 85%-94%, and wind speed is 1.2m/s, crushing <20pa, and its economic benefit significantly improves, and has market popularization value.
Embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
Ultra-thick foam iron
Cut 30mm thick, 500 take advantage of 500mm length and width, ppi to be that on 20(per inch, hole count PPI is 20) the test piece of polyurethane foam sponge, first after the oil removing of chemical conversion treatment thermokalite, clean up, dry for subsequent use.
The test piece of polyurethane foam sponge being immersed is less than in the conduction carbon paste of 20 ohm, repeatedly extrudes three times through pair roller, then heats to 120 degrees Celsius of oven dry 2 hours.
Test piece is hung over the negative electrode of plating tank by conductive fixture, its electroplating solution proportioning
(in units of water: L):ferrous sulfate: 125g/L, iron protochloride: 225 g/L;
Processing condition are: pH value 2.5 temperature: 55 DEG C of current density 8A/dm2 voltage control within 5V, electroplating time: 2 hours,
Cathode screen method: cut PVC board, 300*300mm length and width, 10mm are thick, laminating surface of test piece (one side in the face of anode)
Take out test piece, pure water is cleaned, and drains, and dries to surface without moisture entrapment, heat treatment step (oxidation, reduction):
Oxidation: the product after galvanic deposit is heated to 400 degrees Celsius, 30 minutes time, oxidation removal sponge substrate;
Reduction: reduction furnace 950 degrees Centigrade is put in the test piece after removing sponge, inject hydrogen, nitrogen simultaneously, be incubated gradient cooling after 6 hours, time is 4 hours, after taking-up, after carrying out conventional surface plating watt nickel, then carry out surfacing and deburring, after being cut into diameter 50 millimeters of garden sheets.
Embodiment 2
Ultra-thick foam iron nickel
Cut 10mm thick, 300 take advantage of 300mm length and width, ppi to be that on 50(per inch, hole count PPI is 50) the test piece of polyurethane foam sponge, first after the oil removing of chemical conversion treatment thermokalite, clean up, dry for subsequent use.
The test piece of polyurethane foam sponge being immersed is less than in the conduction carbon paste of 20 ohm, repeatedly extrudes three times through pair roller, then heats to 120 degrees Celsius of oven dry 2 hours.
Test piece is hung over the negative electrode of plating tank by conductive fixture, its electroplating solution proportioning is:
Ferrous sulfate: 150g/L
Iron protochloride: 200 g/L
Processing condition are: pH value 2.0, temperature: 50 DEG C, current density 7A/dm2, voltage control within 4V,
Electroplating time: 2 hours
Cathode screen method: cut PVC board, 300*300mm length and width, 10mm are thick, laminating surface of test piece (one side in the face of anode), and take out test piece, pure water is cleaned, and drains,
Nickel plating: single nickel salt: 200g/L
Nickelous chloride: 70 g/L
Boric acid: 40 g/L
Processing condition are: PH: 4.6 temperature: 65 DEG C of current density 8A/dm2 voltage control are within 5V
Electroplating time: take out test piece in 30 minutes, pure water is cleaned, and drains, dries to surface without moisture entrapment, heat treatment step (oxidation, reduction, the thermodiffusion of iron nickel dam):
Chlorination: the product after galvanic deposit is heated to 400 degrees Celsius, 30 minutes time, oxidation removal sponge substrate;
Reduction, diffusion: reduction furnace 950 degrees Centigrade is put in the test piece after removing sponge, injects hydrogen, nitrogen simultaneously, be incubated gradient cooling after 7 hours, the time is 3 hours, carries out surfacing and deburring after taking-up, after cutting is qualified.
Claims (8)
1. using foam through hole sponge (urethane or polyethers) as skeleton base material, by coated with conductive graphite glue or chemical nickel plating, copper to after skeleton base material surface cleaning processing as electroplating cathode,
2. anode adopts the alloy sheets of pure iron plate or a certain proportion of iron, nickel;
3. negative electrode, anode be shelved on and think the main salt of iron protochloride or iron protochloride and the main salt of nickelous chloride, pH value 2.0-5, in the electroplating solution of temperature between 50-60 DEG C;
4. the sheet material of nonconducting PVC or PE of perforate is as cathode screen plate, the one side of laminating plating piece anode, and concentrated area electric current, electroplates;
5. the work in-process after plating, in the thermal treatment having reducing atmosphere/protection of inert gas, comprise oxidation, reduction two steps;
6. the finished product after thermal treatment carries out surfacing and deburring, carries out cutting by technical requirements.
2. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, is characterized in that: described heat treated temperature is within the scope of 800-1100 DEG C, and the time is between 0.5-2H.
3. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, is characterized in that: voltage <5V.
4. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, is characterized in that: current density during described plating between 8-10A/dm2, pH value 2.0-2.5, temperature: 50-60 DEG C.
5. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, is characterized in that: described electroplating solution electroplating solution proportioning is: (in units of water: L) ferrous sulfate: 100-150g/L; Iron protochloride: 200-250 g/L.
6. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, it is characterized in that: described skeleton base material surface cleaning processing, immerse to be less than in the conduction carbon paste of 20 ohm, repeatedly extrude three times through pair roller, then heat to 120 degrees Celsius of oven dry 2 hours.
7. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, is characterized in that: described oxidation, the product after galvanic deposit is heated to 400 degrees Celsius, time 30-60 minute, oxidation removal sponge substrate.
8. the preparation method of a kind of super thick open celled foam iron nickel filtering material cathode screen according to claim 1, it is characterized in that: described reduction, reduction furnace 950-1000 degrees Centigrade is put in test piece after removing sponge, inject hydrogen, nitrogen simultaneously, be incubated gradient cooling after 6-7 hour, the time is 2-4 hour.
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| CN201310525898.XA CN104593844A (en) | 2013-10-31 | 2013-10-31 | Preparation method of cathode shield for super-thick open-cell foam iron nickel filter material |
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| CN201310525898.XA CN104593844A (en) | 2013-10-31 | 2013-10-31 | Preparation method of cathode shield for super-thick open-cell foam iron nickel filter material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621570A (en) * | 2016-02-03 | 2016-06-01 | 安徽乙地生态科技有限公司 | Sponge for dephosphorization and denitrification in sewage treatment |
| CN113818024A (en) * | 2021-07-29 | 2021-12-21 | 江苏捷士金金属科技有限公司 | Metal sheet surface rust removal device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995470A (en) * | 2006-12-15 | 2007-07-11 | 七二国际股份有限公司 | Process for preparing porous foam metal material |
| CN101265549A (en) * | 2007-03-16 | 2008-09-17 | 长沙力元新材料股份有限公司 | Foam iron-nickel composite metal material and preparation method thereof |
| CN101270489A (en) * | 2008-05-21 | 2008-09-24 | 哈尔滨工业大学 | Method for quick electrodeposition of foam iron with low energy consumption |
-
2013
- 2013-10-31 CN CN201310525898.XA patent/CN104593844A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995470A (en) * | 2006-12-15 | 2007-07-11 | 七二国际股份有限公司 | Process for preparing porous foam metal material |
| CN101265549A (en) * | 2007-03-16 | 2008-09-17 | 长沙力元新材料股份有限公司 | Foam iron-nickel composite metal material and preparation method thereof |
| CN101270489A (en) * | 2008-05-21 | 2008-09-24 | 哈尔滨工业大学 | Method for quick electrodeposition of foam iron with low energy consumption |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621570A (en) * | 2016-02-03 | 2016-06-01 | 安徽乙地生态科技有限公司 | Sponge for dephosphorization and denitrification in sewage treatment |
| CN113818024A (en) * | 2021-07-29 | 2021-12-21 | 江苏捷士金金属科技有限公司 | Metal sheet surface rust removal device |
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Application publication date: 20150506 |