CN107858619A - A kind of loose mail hot-dip galvanizing technique - Google Patents
A kind of loose mail hot-dip galvanizing technique Download PDFInfo
- Publication number
- CN107858619A CN107858619A CN201711139278.7A CN201711139278A CN107858619A CN 107858619 A CN107858619 A CN 107858619A CN 201711139278 A CN201711139278 A CN 201711139278A CN 107858619 A CN107858619 A CN 107858619A
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- China
- Prior art keywords
- workpiece
- zinc
- hot
- dip galvanizing
- zinc liquid
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- 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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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
Abstract
The invention discloses a kind of loose mail hot-dip galvanizing technique, including carbonization deoiling step：Hot forging eliminates oil using residual heat insulation carbonization oil removing, cold part using continuous carbonization furnace or gas flame coal；Impeller blasting step：The oxide skin that impeller blasting removes workpiece surface is carried out to workpiece；Heat hydrogen reduction step：Workpiece is sent into reduction reaction passage, under reducing atmosphere gas shield, heating is carried out to workpiece makes the temperature on its surface be increased to more than 600 DEG C so that workpiece surface oxide layer carries out reduction reaction；Immersion plating steps：Workpiece is sent into the container filled with zinc liquid by the discharging opening of reduction reaction passage and carries out immersion plating, zinc liquid temperature is 420 580 DEG C.The present invention can reduce production process, exempt the drying after pickling, alkali cleaning, immersion fluxing agent, immersion fluxing agent, serious pollution section and follow-up waste liquid, waste water, exhaust-gas treatment with fluxing agent leaching zinc, reduce energy consumption, reduce pollution, and cost of labor and equipment cost are substantially reduced, improves production efficiency.
Description
Technical field
The present invention relates to a kind of zincincation, more particularly to a kind of loose mail hot-dip galvanizing technique.
Background technology
Galvanizing is immersed the steel member after derusting in the zinc liquid of 500 DEG C or so high temperature melts, makes steel member surface attached
Zinc layers, so as to play etch-proof purpose.Because its durable years is grown, steady quality, thus be largely used to by atmospheric corrosion
In more serious and not easy-maintaining outdoor steel structure, such as a large amount of power transmission towers, communications tower, anticorrosive high parts are required.Closely
The lightweight steel construction system that largely occurs over year, automotive sheet, it is also more in various parts use galvanizing anticorrosion, anti-
More and more important effect is played in terms of rotten protection.
At present, plating (leaching is washed+helped to hot-dip galvanizing technique of the prior art including alkali cleaning degreasing+washing+acid pickling and rust removing+
Zinc ammonium chloride fluxing agent) step such as+drying+immersion plating, in order to remove the greasy dirt of piece surface, rusty scale, oxide layer and improve zinc liquid
State, the chemical treatment link such as plating is helped using alkali cleaning oil removing, acid pickling and rust removing, cleaning, zinc chloride ammonia in whole technical process, deposited
In following problem：Cause process route complexity, production cost high, and inevitably generate more serious environmental issue, environmental protection
Processing cost is high.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of hot-dip galvanizing technique, and it can exempt from
Except live pickling, alkali cleaning pollution and follow-up waste liquid, wastewater treatment, energy consumption is reduced, reduces pollution, and greatly reduce people
Work cost and equipment cost.Meanwhile it can also improve workpieces surface condition, improve zinc-plated effect, improves product quality and carry
High efficiency.
The purpose of the present invention adopts the following technical scheme that realization：
A kind of hot-dip galvanizing technique, it is characterised in that including：
Heat hydrogen reduction step：Workpiece is sent into reduction reaction passage, under reducing atmosphere gas shield, to workpiece
Heated, the temperature on its surface is increased to more than 600 DEG C so that workpiece surface oxide layer carries out reduction reaction, by workpiece
The iron oxide on surface is reduced into sponge iron；
Immersion plating steps：The workpiece for completing heating hydrogen reduction step is sent into by the discharging opening of reduction reaction passage and is filled with
In the container of zinc liquid, immersion plating is carried out, zinc liquid temperature is 420-580 DEG C.
Further, the workpiece is steel member, fastener and the steel components for needing galvanizing.
Further, before carrying out heating hydrogen reduction step, the workpiece of oxide layer and attachment also includes to surface
Impeller blasting step：Impeller blasting is carried out to part using shot-blasting machine, removes the oxide skin and attachment of workpiece surface.
Further, before impeller blasting step is carried out, the workpiece of greasy dirt, in addition to carbonization oil removing step are contained to surface
Suddenly, any one in following processing mode is specifically included：
Processing mode one：When the workpiece of pretreatment is hot forging workpiece, by the way of being incubated to the waste heat of workpiece,
Workpiece surface greasy dirt is set to be carbonized；
Processing mode two：When the workpiece of pretreatment is cooling down workpiece, the side of charing process is carried out using continuous carbonization furnace
Formula so that workpiece surface greasy dirt is carbonized；
Processing mode three：When the workpiece of pretreatment is cooling down workpiece, in an oxidizing environment, quickly added using gas flame
The mode of heat, make the burning carbonization of workpiece surface greasy dirt.
Further, reducing atmosphere gas is mixed gas, the hydrogen of pure hydrogen, carbon monoxide, hydrogen and inert gas
In the mixed gas of gas and carbon monoxide, the mixed gas of hydrogen and methane, hydrogen and the mixed gas of carbon monoxide and methane
One kind.
Further, heat in hydrogen reduction step, mode of heating is by sensing heating outside closed conduit or heating wire
Heating.
Further, heat in hydrogen reduction step, reduce workpiece in tunnel and promote using stepping propulsion, directional vibration feeding
Device feeding；Endless apron feeding；One kind in cyclic track hanging carrying method.
Further, heat in hydrogen reduction step, the discharging opening of the reduction reaction passage is connected to zinc liquid container, described
The discharging opening of reduction reaction passage is sealed by zinc liquid.
Further, in immersion plating steps, using quick leaching zinc method by workpiece transfer into zinc liquid, realize workpiece each several part
Start under same temperature zinc-plated, it is ensured that the uniformity of zinc coat；Quick leaching zinc method includes quickly falling leaching method, the pouring of pump zinc liquid
Method, pail pour zinc liquid method, melt the one kind being sprayed in zinc liquid method.
Further, in addition to automatically zinc step is gone out：After completing immersion plating steps, using manipulator by workpiece from zinc liquid container
In pick up, half heavy rotating disk screws out, one kind in orientation vibrations feed appliance submitting method；And trembling using controlled catching robot
Dynamic, the half heavy vibrations rocked, orient vibrations feed appliance for screwing out rotating disk remove zinc more than workpiece surface.
Compared with prior art, the beneficial effects of the present invention are：
1st, the present invention carries out impeller blasting using shot-blasting machine to workpiece, eliminates live pickling, alkali cleaning is polluted and follow-up useless
Liquid, wastewater treatment.Meanwhile the present invention is reduced using high-temperature atmosphere, the workpiece for completing impeller blasting step is sent into reaction channel
In, under reducing atmosphere gas shield, workpiece is heated, the temperature on its surface is increased to more than 600 DEG C, workpiece table
The oxide layer in face is reduced to the sponge iron of the condition of high temperature, workpiece is easier immersion plating, eliminate dip-coating chemistry fluxing agent and after
Continuous baking link, workpiece is set not produce " white cigarette ", " bubbling " and corresponding pollution when entering pot.Simultaneously as workpiece is warmware, leaching
Workpiece temperature when entering zinc liquid is higher than zinc liquid temperature, so improving zinc-plated effect, also considerably reduces to zinc liquid container (zinc
Pot) technical requirements.Therefore, technique of the invention can exempt live pickling, alkali cleaning pollution and follow-up waste liquid, wastewater treatment,
Energy consumption is reduced, reduces pollution, and greatly reduces cost of labor and equipment cost, improves production efficiency.
2nd, technique of the invention is particularly suitable for use in loose mail galvanizing by dipping, completely using chemical cheaning in technical process
And chemicals auxiliary agent, so such Pollution by Chemicals will not be produced, without complicated later stage environmental practice is made, be advantageous to save
Emission reduction, it is significant to galvanizing by dipping industry development.Simultaneously because technique is simple, it is easy to automated production, ensures product
Uniformity, production environment is improved, reduce personnel depaly and labor intensity.The technique of the present invention completes zinc-plated discharging from being fed to
Whole production process requires to carry out according to automation, the participation of not employment, can uninterrupted continuous production, production efficiency is high, production
Product manufacturability is stable.
In summary, technique of the invention is an innovative technology to the galvanizing by dipping of discontinuous part, its popularization
Significant economic and social benefit can be produced.
Embodiment
Below, with reference to embodiment, the present invention is described further, it is necessary to which explanation is, what is do not collided
Under the premise of, new embodiment can be formed between various embodiments described below or between each technical characteristic in any combination.This reality
Apply employed in example to material be commercially available.
A kind of loose mail hot-dip galvanizing technique, including：
Heat hydrogen reduction step：Workpiece is sent into reduction reaction passage, under reducing atmosphere gas shield, to workpiece
Heated, the temperature on its surface is increased to more than 600 DEG C so that workpiece surface oxide layer carries out reduction reaction, by workpiece
The iron oxide on surface is reduced into sponge iron,；
Immersion plating steps：The workpiece for completing heating hydrogen reduction step is sent into by the discharging opening of reduction reaction passage and is filled with
In the container of zinc liquid, immersion plating is carried out, zinc liquid temperature is 420-580 DEG C, and the immersion plating time is the 10-120 seconds.
As preferred embodiment, the workpiece is steel member, fastener and other steel components for needing galvanizing.
As preferred embodiment, before carrying out heating hydrogen reduction step, impeller blasting step：Using shot-blasting machine pair
Impeller blasting is carried out by the workpiece for the deoiling step that is carbonized, removes the oxide skin of workpiece surface.
As preferred embodiment, for the serious workpiece of greasy dirt, before impeller blasting step is carried out, in addition to carbon
Change deoiling step, specifically include any one in following processing mode：
Processing mode one：When the workpiece of pretreatment is hot forging workpiece, by the way of being incubated to the waste heat of workpiece,
Workpiece surface greasy dirt is set to be carbonized；Wherein, the waste heat supply temperature of workpiece is 300-450 DEG C, and soaking time is 10-90 minutes；
Processing mode two：When the workpiece of pretreatment is cooling down workpiece, the side of charing process is carried out using continuous carbonization furnace
Formula so that workpiece surface greasy dirt is carbonized；The waste heat supply temperature of workpiece is 300-450 DEG C, and soaking time is 10-90 minutes；
Processing mode three：When the workpiece of pretreatment is cooling down workpiece, in an oxidizing environment, quickly added using gas flame
The mode of heat, make the burning carbonization of workpiece surface greasy dirt；
After the deoiling step that is carbonized so that the remaining attachment of workpiece surface can be removed easily in impeller blasting step
Thing.
As preferred embodiment, in addition to go out zinc step automatically：After completing immersion plating steps, using manipulator by workpiece
Picked up from zinc liquid container, get rid of Yu Xinhou by shake, input cooling bay is cooled down.
Entirely feed, reduce, entering zinc process and be arranged in order under the promotion of auto-feeder, according to the rhythm of setting, by
Step is orderly quickly to be fallen into zinc liquid through reduction passage, and hot-dip process is completed in specified location.
As preferred embodiment, reducing atmosphere gas is pure hydrogen, the mixed gas of hydrogen and inert gas, hydrogen
The mixed gas of gas and carbon monoxide, the mixed gas of hydrogen and methane, hydrogen and the mixed gas of carbon monoxide and methane, one
One kind in carbonoxide.
As preferred embodiment, heat in hydrogen reduction step, mode of heating is outside sensing heating, heating wire adds
Heat.
As preferred embodiment, heat in hydrogen reduction step, the discharging opening of the reduction reaction passage is connected to zinc
Liquid container, the discharging opening of the reduction reaction passage are sealed by zinc liquid.
As preferred embodiment, in immersion plating steps, using quick leaching zinc method by workpiece transfer into zinc liquid, realize
Start under workpiece each several part same temperature zinc-plated, it is ensured that the uniformity of zinc coat；Quick leaching zinc method include it is quick fall leaching method,
Pump zinc liquid irrigation method, pail pour zinc liquid method, melt the one kind being sprayed in zinc liquid method.
As preferred embodiment, in addition to go out zinc step automatically：After completing immersion plating steps, using manipulator by workpiece
Picked up from zinc liquid container, half heavy rotating disk screws out, one kind in orientation vibrations feed appliance submitting method；And utilize controlled crawl
The shake of manipulator, the half heavy vibrations rocked, orient vibrations feed appliance for screwing out rotating disk remove zinc more than workpiece surface.
Embodiment 1：
A kind of 45# steel cold-heading single head pin hot dip galvanizing process, including：
Step 1：Be carbonized oil removing
Because the workpiece is cold-heading part, there is a little greasy dirt on surface, and workpiece is quickly heated up into 450 DEG C using sensing heating
Afterwards, workpiece is sent into maintenance tunnel and is incubated 30 minutes, send out maintenance tunnel.
Step 2：Impeller blasting
Impeller blasting is carried out to workpiece using shot-blasting machine, removes the oxide skin of workpiece surface；
Step 3：Heat hydrogen reduction
The method that the workpiece for completing impeller blasting step is used into stepping propulsion, is sent into closed reduction reaction passage,
Under pure hydrogen reducing atmosphere gas shield, the quick heating of outside sensing is carried out to workpiece, the temperature on its surface is increased to 720
DEG C so that workpiece surface oxide layer quickly carries out reduction reaction, and the time of reduction reaction is 15 seconds；
Step 4：Hot-dip
By the workpiece for completing heating hydrogen reduction step by the discharging opening of reduction reaction passage, the leaching of zinc liquid is fallen into using quick
Workpiece transfer to temperature is in 450 DEG C of zinc liquid by zinc method, carries out galvanizing by dipping, and the immersion plating time is 15 seconds；.
Step 5：Automatically zinc is gone out
After completing immersion plating steps, workpiece is picked up from zinc liquid container using manipulator and sent out using orientation vibrations feed appliance
Sent out from zinc liquid container, get rid of Yu Xinhou by shake, input cooling bay is cooled down.
Embodiment 2：
A kind of 45# steel cold-heading single head pin hot dip galvanizing process, including：
Step 1：Be carbonized oil removing
Because the workpiece is cold-heading part, there is a little greasy dirt on surface, and workpiece is quickly heated up into 450 DEG C using sensing heating
Afterwards, workpiece is sent into maintenance tunnel and is incubated 30 minutes, send out maintenance tunnel.
Step 2：Impeller blasting
Impeller blasting is carried out to workpiece using shot-blasting machine, removes the oxide skin of workpiece surface；
Step 3：Heat hydrogen reduction
The workpiece for completing impeller blasting step is used into inner loop conveyer belt feeding method, closed reduction reaction is sent into and leads to
In road, under pure hydrogen reducing atmosphere gas shield, the quick heating of outside sensing is carried out to workpiece, makes the temperature liter on its surface
Up to 650 DEG C so that workpiece surface oxide layer quickly carries out reduction reaction, and the time of reduction reaction is 180 seconds；
Step 4：Hot-dip
By the workpiece for completing heating hydrogen reduction step by the discharging opening of reduction reaction passage, the leaching of zinc liquid is fallen into using quick
Workpiece transfer to temperature is in 450 DEG C of zinc liquid by zinc method, carries out galvanizing by dipping, and the immersion plating time is 45 seconds；.
Step 5：Automatically zinc is gone out
Complete to carry out while sending out from zinc liquid container and send out using orientation vibrations feed appliance, and shake during submitting
Galvanizing by dipping, and Yu Xinhou is removed by vibrations in orientation vibrations feed appliance after workpiece sends out zinc liquid, it is cold to fall into cooling bay progress
But.
Above-mentioned embodiment is only the preferred embodiment of the present invention, it is impossible to the scope of protection of the invention is limited with this,
The change and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed scope.
Claims (10)
- A kind of 1. loose mail hot-dip galvanizing technique, it is characterised in that including：Heat hydrogen reduction step：Workpiece is sent into reduction reaction passage, under reducing atmosphere gas shield, workpiece carried out Heating, makes the temperature on its surface be increased to more than 600 DEG C so that workpiece surface oxide layer carries out reduction reaction, by workpiece surface Iron oxide be reduced into sponge iron；Immersion plating steps：The workpiece for completing heating hydrogen reduction step is sent into by the discharging opening of reduction reaction passage and is filled with zinc liquid Container in, carry out immersion plating, zinc liquid temperature be 420-580 DEG C.
- 2. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that the workpiece be steel member, fastener and Need the steel components of galvanizing.
- 3. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that for heat hydrogen reduction step it Before, the workpiece of oxide layer and attachment, in addition to impeller blasting step are contained to surface：Using shot-blasting machine to by the oil removing that is carbonized The workpiece of step carries out impeller blasting, removes the oxide skin and attachment of workpiece surface.
- 4. loose mail hot-dip galvanizing technique as claimed in claim 3, it is characterised in that right before impeller blasting step is carried out The workpiece of greasy dirt, in addition to carbonization deoiling step are contained in surface, specifically include any one in following processing mode：Processing mode one：When the workpiece of pretreatment is hot forging workpiece, by the way of being incubated to the waste heat of workpiece, make work Part surface and oil contaminant is carbonized；Processing mode two：When the workpiece of pretreatment is cooling down workpiece, by the way of continuous carbonization furnace carries out charing process, make Obtain the carbonization of workpiece surface greasy dirt；Processing mode three：When the workpiece of pretreatment is cooling down workpiece, in an oxidizing environment, quickly heated using gas flame Mode, make the burning carbonization of workpiece surface greasy dirt.
- 5. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that reducing atmosphere gas is pure hydrogen, one Carbonoxide, the mixed gas of hydrogen and inert gas, the mixed gas of hydrogen and carbon monoxide, the gaseous mixture of hydrogen and methane One kind in the mixed gas of body, hydrogen and carbon monoxide and methane.
- 6. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that in heating hydrogen reduction step, mode of heating To pass through sensing heating outside closed conduit or electric-heating-wire-heating.
- 7. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that in heating hydrogen reduction step, reduce tunnel Middle workpiece is promoted using stepping propulsion, directional vibration feed appliance feeding；Endless apron feeding；Cyclic track hangs carrying method In one kind.
- 8. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that in heating hydrogen reduction step, the reduction The discharging opening of reaction channel is connected to zinc liquid container, and the discharging opening of the reduction reaction passage is sealed by zinc liquid.
- 9. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that in immersion plating steps, using quick leaching zinc side Method by workpiece transfer into zinc liquid, realize start under workpiece each several part same temperature it is zinc-plated, it is ensured that the uniformity of zinc coat；Quickly Leaching zinc method includes quickly falling in leaching method, pump zinc liquid irrigation method, pail pouring zinc liquid method, thawing spray drop zinc liquid method It is a kind of.
- 10. loose mail hot-dip galvanizing technique as claimed in claim 1, it is characterised in that also include going out zinc step automatically：Complete leaching After plating step, workpiece is picked up from zinc liquid container using manipulator, half heavy rotating disk screws out, orientation vibrations feed appliance sends out method In one kind；And utilize the shake of controlled catching robot, the half heavy vibrations rocked, orient vibrations feed appliance for screwing out rotating disk Zinc more than removal workpiece surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711139278.7A CN107858619A (en) | 2017-11-16 | 2017-11-16 | A kind of loose mail hot-dip galvanizing technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711139278.7A CN107858619A (en) | 2017-11-16 | 2017-11-16 | A kind of loose mail hot-dip galvanizing technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106460A (en) * | 2019-05-21 | 2019-08-09 | 安徽伟宏钢结构集团股份有限公司 | A kind of continuous operation steel member hot-dip galvanizing technique |
| CN111334733A (en) * | 2020-04-30 | 2020-06-26 | 苏州鑫吴钢结构工程有限公司 | Galvanizing method for steel pipe with support |
| CN112251693A (en) * | 2020-09-08 | 2021-01-22 | 徐州瑞马智能技术有限公司 | Vertical blowing type hot galvanizing device for foundation bolts only plated in partial length |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106460A (en) * | 2019-05-21 | 2019-08-09 | 安徽伟宏钢结构集团股份有限公司 | A kind of continuous operation steel member hot-dip galvanizing technique |
| CN111334733A (en) * | 2020-04-30 | 2020-06-26 | 苏州鑫吴钢结构工程有限公司 | Galvanizing method for steel pipe with support |
| CN112251693A (en) * | 2020-09-08 | 2021-01-22 | 徐州瑞马智能技术有限公司 | Vertical blowing type hot galvanizing device for foundation bolts only plated in partial length |
| CN112251693B (en) * | 2020-09-08 | 2023-09-01 | 徐州瑞马智能技术有限公司 | Perpendicular blowing type hot galvanizing device for foundation bolt with only part of length being plated |
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