CN101343123A - Technique for recycling acid waste liquid of strip steel - Google Patents
Technique for recycling acid waste liquid of strip steel Download PDFInfo
- Publication number
- CN101343123A CN101343123A CNA2007101186385A CN200710118638A CN101343123A CN 101343123 A CN101343123 A CN 101343123A CN A2007101186385 A CNA2007101186385 A CN A2007101186385A CN 200710118638 A CN200710118638 A CN 200710118638A CN 101343123 A CN101343123 A CN 101343123A
- Authority
- CN
- China
- Prior art keywords
- acid
- stoving oven
- gas
- technique
- waste liquid
- 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.)
- Pending
Links
Images
Abstract
Disclosed is a strip steel acid washing waste liquid reutilization technique, which comprises: adopting a spray roasting process in the process flow; applying a DCS system and a variable frequency regulation technique on a control system; adopting anticorrosion measures on equipment anticorrosion; adopting a home-made regulated reinforced polypropylene filler on a tail gas recovery system; and selecting a sinter board dust catcher made by wave type sinter filter elements in equipment of a dust-removal system; and the waste acid and cleaning effluent can be fully regenerated into new acid for recycling through the technique, the technique of non-waste liquid acid washing is realized, the waste liquid can be reused, and the technique has advantages of saving energy, reducing costs, protecting the environment, changing wastes into valuables and high efficiency.
Description
Technical field
The invention belongs to the ferrous metallurgy field, particularly a kind of strip pickling waste liquid recycling technology in ferrous metallurgy field.
Background technology
In modernized rolling mill production line, pickling is indispensable a kind of important process, because free acid and dissolved Fe ionic concn in pickling efficient and the acid solution have confidential relation, for keeping stable pickling quality and acid solution speed, quantitatively discharge the spent acid of pickling and add the composition ratio that eo-acid keeps acid solution in the pickling tank.Therefore, pickling line is discharged the important topic that is treated as rolling mill production line of spent acid.Traditional neutralizing treatment method spent acid quantity discharged is too big, has not only polluted environment and has wasted the energy, does not also meet economic benefit, and enterprise must be permitted a large amount of financial resources of annual cost and purchase fresh hydrochloric acid.
Summary of the invention,
At the shortcoming that above-mentioned prior art exists, the long-pending experience of being engaged in this area work for many years of the inventor, through continuous design improvement, a kind of strip pickling waste liquid recycling technology is invented in feasibility study repeatedly.
The technical solution used in the present invention is: a kind of strip pickling waste liquid recycling technology, in technical process, adopt spray roasting technology; On Controlling System, use DCS system and variable frequency adjustment technology; On equipment anticorrosion, adopt anti-corrosion measure; On exhaust gas recovery system, adopt homemade regular Reinforced Polypropylene filler; On dust-removal system, in equipment, select for use by wave and mould the sintered plate fly-ash separator that burns the filter core manufacturing.
Above-mentioned technical process mainly is: (1), the spent pickle liquor that will come from the pickling unit are collected in the spent acid jar; (2), with pump will store acid jar in acid deliver to waste acid filter, in strainer, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution; (3), spent acid enters the bottom of preconcentrator by a pneumatic operation valve, automatically controls the liquid level of preconcentrator bottom by this pneumavalve, acid solution flows to recycle pump with specified amount from giving thickener; (4), make spent acid by giving thickener circulation, the direct heat exchange of thermal bake-out gas with from stoving oven evaporates partially liq.Give the spent acid solution that concentrated and after concentrating waste acid filter filters, deliver to the nozzle of stoving oven by the stoving oven feeding pump with the flow of a control; (5), combustion gases are at inner certain liquid form that forms of stoving oven, thereby oven dry from the concentrated drop of giving of nozzle, and FeCL2 and FeCL3 carry out equation and decompose in the thermal region of stoving oven; (6), solid particulate Fe
2O
3Drop in the stoving oven lower taper body with form of powder, and emit with a rotary valve, leave stoving oven from the top of stoving oven and by cyclonic separator with contained Fe
2O
3The dust major part is separated, and the oxide compound of separating discharges by rotary valve, and returns stoving oven; (7) roasting gas enters preconcentrator, and in giving thickener, high-temperature gas directly contacts with recycle acid, be cooled and purge gas in only residual a spot of oxide compound, and enter the absorption tower; (8), use high quality water and rinse water absorbing hydrogen chloride gas, water is sent into from the top, absorption tower, in the absorption tower, the nozzle divider is arranged with on the filler of water distribution in the absorption tower; In counter-current process, the hydrogen chloride in gas composition is absorbed thereby forms regenerating acid; (9), regenerating acid leaves the absorption tower from the bottom, and flows to the regenerating acid storagetank, contains combustion exhaust and then left from the top, absorption tower by the gas of the water vapor that micro-HCL pollutes, and ejects water on the blade of exhaust gas fan again, this blower fan is also as washing unit; After the exhaust gas fan is an exhaust gas washing tower, washing tower is designed to two-layer, and filler respectively is housed, at the bottom of washing tower rinse water circulation cleaning waste gas, use on the top of washing tower high quality water is supplied with the washing tower scrubbing exhaust gas, by exhaust gas evacuation behind the two-stage circulation cleaning.
Above-mentioned anti-corrosion measure mainly is: pickling tank is divided into four sections, cell body is a carbon steel structure, liner isoprene-isobutylene rubber and sour ceramic tile and granite bar, be provided with acid solution between each section groove and extract rubber roll and acid solution insulated chamber, bottom land serves as a contrast grouan and extracts the rubber roll lower roll surface on same plane, be provided with glass steel tank lid on band steel operation top, plane, and realize the sealing of pickling tank by water seal; The nozzle that burns stove is installed on 3 spray guns, and these nozzles are by sintered material AL
2O3
3Material is made, and in the nozzle front of spray gun inside a strainer is arranged, and stoving oven is a box hat, is lined with refractory brick in it.
The regeneration hydrochloric acid of the not only recyclable rolling mill production line necessary 18% of the present invention; and the brown iron oxide that can obtain having high economic worth; brown iron oxide is as ferrite raw material; mainly be used in soft or hard magnetic at different levels, antenna and various inductance element etc.; it is the important source material that the current electronic technology period of full bloom supports the latest modern technological technology; spent acid and cleaning waste liquid can holomorphosis be eo-acid; recycle; realized the technology of no waste liquid pickling, can make waste liquid recycling, save energy; reduce cost; protection environment, refuse become precious, high efficiency.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
As shown in Figure 1, the present invention make band steel acidity wash processing all processes is all online to be finished to batching from uncoiling.
Pickling tank is divided into four sections, and cell body is a carbon steel structure, liner isoprene-isobutylene rubber and sour ceramic tile and granite bar.When this structure can avoid safeguard changing the grouan liner and do not destroy the liner rubber layer.Be provided with acid solution between each section groove and extract rubber roll and acid solution insulated chamber, bottom land lining grouan with extract the rubber roll lower roll surface on same plane, be provided with glass steel tank lid on band steel operation top, plane, and realize the sealing of pickling tank by water seal.The squeezing roller Frequency Drive, and can the variation by current of electric detect crossing process and take the lead situation, avoid being with steel overlapping accumulation in acid tank.Every section acid tank is provided with a cover acid solution hydronics, and acid solution adds the vertical graphite heat exchanger heating of thermal recovery, and acid solution flows fast with turbulent form, thereby greatly improved pickling speed under the help of trough body structure simultaneously.Eo-acid by 4# acid circulation tank mend into, simultaneously by sour circulation tank tank level control system, replenish forward step by step, drain into the spent acid holding tank by the 1# groove at last.Because each section pickling tank is isolated relatively, therefore independent loops, can control the concentration gradient of each section acid tank effectively separately.Rinse bath is back flushing (using) for first section when the pumpback steel band, wash-down water is disposed to the complex acid jar.All the other 4 sections are adopted circulated sprinklings flushings (water of condensation), and clear water is mended into, wash-down water by the 5th section flushed channel and flowed to the 2nd section at the bottom of rinse bath header tank step by step from the 4th grade, drains into the wash-down water holding tank by the 2nd section overflow port at last.Whole pickling tank and rinse bath are taked little negative pressure control, by the induced exhaust that is arranged on each section import and export acid mist are evacuated to the acid mist washing tower, discharge emptying outside the factory behind spray washing.For adopting following technique means, the purpose the present invention who realizes the waste liquid recycling finishes.
1, in technical process, adopt spray roasting technology, spray roasting efficiency of furnace height, operational path is reasonable, makes regenerating acid concentration reach 15 ~ 18% (wt%), iron level≤5.0g/l in the regenerating acid, the reproducible chlorine rate of recovery reaches 99%, simultaneously also obtain byproduct Fe2O3 powder, complete assembly has reached the bleeding edge of external same device, and has realized the technology of this device and the production domesticization of equipment.
2, on Controlling System, use DCS system and variable frequency adjustment technology, make full device stable, reached the level of automation of external same device, easy to operate, labour intensity is low, and instrument is reliable, corrosion resistance and good.
3, on equipment anticorrosion, company drops into a large amount of human and material resources and financial resources, successfully solved the heavy corrosion problem of muriate brings in this device equipment, pipeline and buildings, made appliance arrangement, pipeline, instrument etc. imitate ground, steady running for a long time.
4, on exhaust gas recovery system, adopt homemade regular Reinforced Polypropylene filler to replace general random packing in the external device, under the identical situation of tower diameter, packed height, improved the processing power of equipment effectively, improved the chlorine rate of recovery, reduced the content of discharging hydrogen chloride in tail gas, the device exhaust discharging meets state environmental emissioning standard fully.
5, on dust-removal system, in equipment, select for use by wave and mould the sintered plate fly-ash separator that burns the filter core manufacturing, replace traditional sack cleaner, mould and burn cartridge surface through advanced treatment, the aperture is tiny evenly, has hydrophobicity, not only be difficult for being stained with dust, and moisture higher dust is difficult for also being stained with, so its efficiency of dust collection superelevation: the exhaust dust content can be controlled in 5mg/m3, maximal emission is at 19mg/m3, and efficiency of dust collection reaches 99.999%; Long service life is more than 8 times of sack cleaner.
The strip pickling technical process:
The station is prepared in pre-uncoiling: the material feeding platform → on roll up dolly → ground rolling type Abrollhaspel → strap clamp send three-roll unbender → corner cut cut → hydraulic pressure cuts → the waste material bucket.
The pickling unit: artificial material loading → on roll up the upright deflector roll → strap clamp of dolly → Abrollhaspel → (band pressure roller) → uncoiling scraper → 1# and send nine roller straighteners → riveting segment → crescent moon to cut → 1# pinch machine → recoil washing trough (900mm, 2 of squeezing rollers) → 4 grade hydrochloric acid pickling tank (4 * 12.5m, 5 of squeezing rollers) → 5 grades of washing baths (12m, 5 of squeezing rollers) → hot-air drier → 2# pinch roll → kink hole (kink swing platform is established at two) → side deflector roll → pinch transducer → circle shear → coiler for trimmings → three-roller type tensioning roller → outlet shears → (electrostatic oiler-reservation) → outlet turning, clamping and conveying machine → reeling machine → coil stripping car → material feeding platform.
This process description is as follows:
In the cold-rolling pickling production line, when using acid pickling steel plate with hydrochloric acid, the ferric oxide of plate surface is washed off by hydrochloric acid and is formed iron protochloride or iron(ic) chloride is dissolved in the pickle solution, along with the iron concentration that carries out in the pickle solution of acid cleaning process can raise, and the corresponding reduction of concentration of free HCL.For the iron ion that keeps the concentration of the free HCL in the pickling acid solution, remove increasing in the acid solution, the quantitative acid regeneration device regeneration free acid that is sent to of spent acid solution is returned the pickling unit, obtain brown iron oxide simultaneously.
Acid cleaning process can be described with following chemical equation:
Fe+2HCL＝FeCL
2+H2
FeO+2HCL＝FeCL
2+H
2O
Fe
2O
3+2HCL＝FeCL
2+FeCL
3+H2O
Fe
2O
3+6HCL＝2FeCL
3+3H
2O
2FeCL3+Fe＝3FeCL2
4FeCL
2+4HCL+O
2＝4FeCL
3+2H
3O
The spent pickle liquor that comes from the pickling unit is collected in the spent acid jar.
Deliver to waste acid filter with the acid that pump will be store in the acid jar, in strainer, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution.
Spent acid enters the bottom of preconcentrator by a pneumatic operation valve, is automatically controlled the liquid level of preconcentrator bottom by this pneumavalve.Acid solution flows to recycle pump with specified amount from giving thickener.Because flowing to the spent acid amount of roasting is constant.Thereby the spent acid amount that flows to thickener also is a constant.Make spent acid by giving the thickener circulation, the direct heat exchange of thermal bake-out gas with from stoving oven evaporates partially liq.Give the spent acid solution that concentrated and after concentrating waste acid filter filters, deliver to the nozzle of stoving oven by the stoving oven feeding pump with the flow of a control.These nozzles are installed on 3 spray guns, and spray gun can automatically be inserted in the top of stoving oven.These nozzles are by exotic materials manufacturing (sintered material AL
2O3
3).In the nozzle front of spray gun inside a strainer is arranged, stop up to prevent nozzle.
Stoving oven is a box hat, is lined with refractory brick in it, directly is used in garden Zhou Fangxiang and is 3 burnings that tangent line is arranged on the box hat and chews heating.Combustion gases form certain liquid form in stoving oven inside, thereby dry from the concentrated drop of giving of nozzle, and in the thermal region of stoving oven (300 ~ 800 ℃), FeCL
2And FeCL
3Decompose according to following equation:
FeCL
2+2H
2O+1/2O
2＝Fe
2O
3+4HCL↑
2FeCL
3+3H2
2O＝Fe
2O
3+6HCL↑
Solid particulate (Fe
2O
3) drop in the stoving oven lower taper body with form of powder, and emit with a rotary valve.Rotary valve can make the stoving oven gas inside keep apart with extraneous gas.On the top of rotary valve an oxide blocks crusher has been installed, has been used for broken any agglomerate that can fall from the roasting furnace wall.
Stoving oven gas is by combustion exhaust, and water vapor and hydrogen chloride gas are formed, leave stoving oven from the top of stoving oven and by cyclonic separator with contained Fe
2O
3The dust major part is separated.The oxide compound of separating discharges by rotary valve, and returns stoving oven.Roasting gas enters preconcentrator then, and in giving thickener, high-temperature gas directly contacts with recycle acid, and be cooled and purge gas in only residual a spot of oxide compound, and enter the absorption tower.
For absorbing hydrogen chloride gas, use high quality water and rinse water.Water is sent into from the top, absorption tower, in the absorption tower, the nozzle divider is arranged with on the filler of water distribution in the absorption tower.In counter-current process, the hydrogen chloride in gas composition is absorbed thereby forms regenerating acid.
Regenerating acid leaves the absorption tower from the bottom, and flows to the regenerating acid storagetank.Contain combustion exhaust and then left by the gas of the water vapor of micro-HCL pollution from the top, absorption tower.Therefore, eject water on the blade of exhaust gas fan, this blower fan is also as washing unit again.After the exhaust gas fan is an exhaust gas washing tower, and washing tower is designed to two-layer, and filler respectively is housed, at the bottom of washing tower rinse water circulation cleaning waste gas.
Use on the top of washing tower high quality water is supplied with the washing tower scrubbing exhaust gas, by exhaust gas evacuation behind the two-stage circulation cleaning.
Exhaust gas fan can be controlled automatically and make all equipment unit all be in slight negative pressure state, therefore, does not have any hydrogenchloride in the system and leaks out.
The brown iron oxide that stoving oven is produced carries (working under slight negative pressure state to prevent that dust from leaking in the atmosphere) to the oxide compound feed bin by a pneumatic conveyor system.A sintered plate formula strainer is installed on the top of feed bin carries Fe with cleaning
2O
3The time exhausted air, exhaust air in the atmosphere then.In feed bin bottom, with a placement valve with Fe
2O
3Powder discharges in the container of sack packer into.
Main process parameter, as temperature, pressure and flow can be shown by numeral on computer screen in the watch-keeping cubicle, and important operating parameters is all automatically controlled by the PLC system automatically, and the startup of equipment, control and parking all can be finished by keyboard.The design of the instrument of reclaim equiment makes simplified control, simultaneously can guarantee operational safety, and interlocking system can prevent to expect technical failure in equipment failure or end, as shortcomings such as heating medium, power supplys, even when not having operator, the structure deteriorate that is caused.Just in case emergency episode occurs, regenerating unit can quit work automatically.
In sum, be preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention when the function that is produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (3)
1, a kind of strip pickling waste liquid recycling technology is characterized in that: in technical process, adopt spray roasting technology; On Controlling System, use DCS system and variable frequency adjustment technology; On equipment anticorrosion, adopt anti-corrosion measure; On exhaust gas recovery system, adopt homemade regular Reinforced Polypropylene filler; On dust-removal system, in equipment, select for use by wave and mould the sintered plate fly-ash separator that burns the filter core manufacturing.
2, as right 1 described strip pickling waste liquid recycling technology, it is characterized in that: above-mentioned technical process mainly is: (1), the spent pickle liquor that will come from the pickling unit are collected in the spent acid jar; (2), with pump will store acid jar in acid deliver to waste acid filter, in strainer, the solid particulate and the undissolved residue that produce in the pickling operation are separated from acid solution; (3), spent acid enters the bottom of preconcentrator by a pneumatic operation valve, automatically controls the liquid level of preconcentrator bottom by this pneumavalve, acid solution flows to recycle pump with specified amount from giving thickener; (4), make spent acid by giving thickener circulation, the direct heat exchange of thermal bake-out gas with from stoving oven evaporates partially liq.Give the spent acid solution that concentrated and after concentrating waste acid filter filters, deliver to the nozzle of stoving oven by the stoving oven feeding pump with the flow of a control; (5), combustion gases are at inner certain liquid form that forms of stoving oven, thereby oven dry from the concentrated drop of giving of nozzle, and FeCL2 and FeCL3 carry out equation and decompose in the thermal region of stoving oven; (6), solid particulate Fe
2O
3Drop in the stoving oven lower taper body with form of powder, and emit with a rotary valve, leave stoving oven from the top of stoving oven and by cyclonic separator with contained Fe
2O
3The dust major part is separated, and the oxide compound of separating discharges by rotary valve, and returns stoving oven; (7) roasting gas enters preconcentrator, and in giving thickener, high-temperature gas directly contacts with recycle acid, be cooled and purge gas in only residual a spot of oxide compound, and enter the absorption tower; (8), use high quality water and rinse water absorbing hydrogen chloride gas, water is sent into from the top, absorption tower, in the absorption tower, the nozzle divider is arranged with on the filler of water distribution in the absorption tower; In counter-current process, the hydrogen chloride in gas composition is absorbed thereby forms regenerating acid; (9), regenerating acid leaves the absorption tower from the bottom, and flows to the regenerating acid storagetank, contains combustion exhaust and then left from the top, absorption tower by the gas of the water vapor that micro-HCL pollutes, and ejects water on the blade of exhaust gas fan again, this blower fan is also as washing unit; After the exhaust gas fan is an exhaust gas washing tower, washing tower is designed to two-layer, and filler respectively is housed, at the bottom of washing tower rinse water circulation cleaning waste gas, use on the top of washing tower high quality water is supplied with the washing tower scrubbing exhaust gas, by exhaust gas evacuation behind the two-stage circulation cleaning.
3, as right 1 described strip pickling waste liquid recycling technology, it is characterized in that: above-mentioned anti-corrosion measure mainly is: pickling tank is divided into four sections, cell body is a carbon steel structure, liner isoprene-isobutylene rubber and sour ceramic tile and granite bar, be provided with acid solution between each section groove and extract rubber roll and acid solution insulated chamber, bottom land lining grouan with extract the rubber roll lower roll surface on same plane, be provided with glass steel tank lid on band steel operation top, plane, and realize the sealing of pickling tank by water seal; The nozzle that burns stove is installed on 3 spray guns, and these nozzles are by sintered material AL
2O3
3Material is made, and in the nozzle front of spray gun inside a strainer is arranged, and stoving oven is a box hat, is lined with refractory brick in it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101186385A CN101343123A (en) | 2007-07-11 | 2007-07-11 | Technique for recycling acid waste liquid of strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101186385A CN101343123A (en) | 2007-07-11 | 2007-07-11 | Technique for recycling acid waste liquid of strip steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101343123A true CN101343123A (en) | 2009-01-14 |
Family
ID=40245263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101186385A Pending CN101343123A (en) | 2007-07-11 | 2007-07-11 | Technique for recycling acid waste liquid of strip steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101343123A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830960A (en) * | 2014-01-15 | 2014-06-04 | 中冶南方工程技术有限公司 | Wastewater zero-discharge system for acid regeneration system and process of wastewater zero-emission system |
| CN105039731A (en) * | 2015-09-10 | 2015-11-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for maintaining system heat balance in titanium slag leaching process |
| CN106495231A (en) * | 2016-09-08 | 2017-03-15 | 佛山津西金兰冷轧板有限公司 | A kind of spent acid processes recovery technology |
| CN106630334A (en) * | 2015-10-29 | 2017-05-10 | 宝山钢铁股份有限公司 | Cold-rolled acid wastewater resource and zero-emission method |
| CN107574450A (en) * | 2017-10-20 | 2018-01-12 | 鞍山创新废酸除硅再生工程有限公司 | A kind of stainless steel acid-washing waste liquid renovation process and system |
| CN108083529A (en) * | 2016-11-23 | 2018-05-29 | 宝山钢铁股份有限公司 | A kind of method that chromate waste water cooperates with processing with acid waste water |
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN108793542A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of method that cold rolling acid waste water cooperates with processing with alkaline waste water |
| CN108866554A (en) * | 2017-05-16 | 2018-11-23 | 鲍兴亮 | Prepare the method and device thereof of rust remover |
| CN109453615A (en) * | 2018-12-19 | 2019-03-12 | 湖北星火化工有限公司 | A kind of processing method of methylsufonyl chloride production tail gas |
| CN109490142A (en) * | 2018-11-28 | 2019-03-19 | 武汉钢铁有限公司 | A kind of concentration analyzer of cold-rolling pickling liquid |
| CN109987642A (en) * | 2019-03-20 | 2019-07-09 | 湖南华菱涟钢薄板有限公司 | A kind of process system producing frerrous chloride and process |
| CN110776183A (en) * | 2019-10-25 | 2020-02-11 | 孙灯涛 | Regeneration treatment system and method for saccharin sodium production waste liquid |
| CN110857472A (en) * | 2018-08-23 | 2020-03-03 | 武汉鑫麒科技有限公司 | Safe and environment-friendly metal continuous rust removal method and device |
| CN111960473A (en) * | 2020-09-23 | 2020-11-20 | 沈阳宇能机械工程科技有限公司 | Integrated device and method for treating waste liquid of ferrous chloride hydrochloric acid solution |
| WO2021017940A1 (en) * | 2019-07-29 | 2021-02-04 | 中冶南方工程技术有限公司 | Method for hazard-free treatment of sludge from spent solution of mixed acids after acid washing of stainless steel |
-
2007
- 2007-07-11 CN CNA2007101186385A patent/CN101343123A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103830960A (en) * | 2014-01-15 | 2014-06-04 | 中冶南方工程技术有限公司 | Wastewater zero-discharge system for acid regeneration system and process of wastewater zero-emission system |
| CN105039731A (en) * | 2015-09-10 | 2015-11-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for maintaining system heat balance in titanium slag leaching process |
| CN106630334A (en) * | 2015-10-29 | 2017-05-10 | 宝山钢铁股份有限公司 | Cold-rolled acid wastewater resource and zero-emission method |
| CN106495231A (en) * | 2016-09-08 | 2017-03-15 | 佛山津西金兰冷轧板有限公司 | A kind of spent acid processes recovery technology |
| CN108083529A (en) * | 2016-11-23 | 2018-05-29 | 宝山钢铁股份有限公司 | A kind of method that chromate waste water cooperates with processing with acid waste water |
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN108793542A (en) * | 2017-04-28 | 2018-11-13 | 宝山钢铁股份有限公司 | A kind of method that cold rolling acid waste water cooperates with processing with alkaline waste water |
| CN108866554A (en) * | 2017-05-16 | 2018-11-23 | 鲍兴亮 | Prepare the method and device thereof of rust remover |
| CN107574450A (en) * | 2017-10-20 | 2018-01-12 | 鞍山创新废酸除硅再生工程有限公司 | A kind of stainless steel acid-washing waste liquid renovation process and system |
| CN110857472A (en) * | 2018-08-23 | 2020-03-03 | 武汉鑫麒科技有限公司 | Safe and environment-friendly metal continuous rust removal method and device |
| CN110857472B (en) * | 2018-08-23 | 2022-09-20 | 武汉森宁开源科技有限公司 | Safe and environment-friendly metal continuous rust removal method and device |
| CN109490142A (en) * | 2018-11-28 | 2019-03-19 | 武汉钢铁有限公司 | A kind of concentration analyzer of cold-rolling pickling liquid |
| CN109453615A (en) * | 2018-12-19 | 2019-03-12 | 湖北星火化工有限公司 | A kind of processing method of methylsufonyl chloride production tail gas |
| CN109987642A (en) * | 2019-03-20 | 2019-07-09 | 湖南华菱涟钢薄板有限公司 | A kind of process system producing frerrous chloride and process |
| CN109987642B (en) * | 2019-03-20 | 2022-01-25 | 湖南华菱涟钢特种新材料有限公司 | Process system and process method for producing ferrous chloride |
| WO2021017940A1 (en) * | 2019-07-29 | 2021-02-04 | 中冶南方工程技术有限公司 | Method for hazard-free treatment of sludge from spent solution of mixed acids after acid washing of stainless steel |
| CN110776183A (en) * | 2019-10-25 | 2020-02-11 | 孙灯涛 | Regeneration treatment system and method for saccharin sodium production waste liquid |
| CN111960473A (en) * | 2020-09-23 | 2020-11-20 | 沈阳宇能机械工程科技有限公司 | Integrated device and method for treating waste liquid of ferrous chloride hydrochloric acid solution |
| CN111960473B (en) * | 2020-09-23 | 2024-03-29 | 沈阳宇能机械工程科技有限公司 | Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101343123A (en) | Technique for recycling acid waste liquid of strip steel | |
| CN101214924B (en) | Regenerating system and technique for three-tower waste aid | |
| CN1851320B (en) | Hydrochloride waste regenerating process for spray roasting | |
| CN101219774B (en) | Four-column waste acid regenerating system and technique | |
| CN105251337A (en) | Carbon roasting smoke calcium hydroxide desulfurization and defluorination purification method and device | |
| CN111850608A (en) | Method for recovering electrolyte by pyrogenic roasting of electrolytic aluminum carbon slag | |
| CN107828429A (en) | A kind of environment friendly wet quenching vehicle and coke wet quenching method | |
| CN208742240U (en) | A kind of carbide slag high-efficiency desulfurization system | |
| CN102277463A (en) | Reduction furnace and device for producing direct reduced iron | |
| CN102674251A (en) | Waste acid recovery and treatment process | |
| CN205529050U (en) | Silicon steel pickling installation | |
| CN107217150A (en) | The method and apparatus of secondary zinc oxide removal of impurities concentration of valuable metals zinc | |
| CN112206600A (en) | Rare earth electrolytic cell flue gas treatment method and device | |
| CN206666608U (en) | The equipment of secondary zinc oxide removal of impurities concentration of valuable metals zinc | |
| CN216698490U (en) | Soaking discharge device for recycling waste lithium ion batteries | |
| CN105688565B (en) | Metallurgical ore deposit baking tail gases purification and heat reclaim unit and its technique | |
| CN110628971B (en) | Energy-saving environment-friendly slag flushing method and device | |
| CN207085600U (en) | The clarifying smoke processing equipment of secondary zinc oxide removal of impurities concentration of valuable metals zinc | |
| CN114292673A (en) | Blast furnace gas wet pervaporation dechlorination method and dechlorination device | |
| CN101164903B (en) | Device for preparing cobaltosic oxide powder by spray roasting | |
| CN207462952U (en) | A kind of self-adhesion sizing material transport system of waterproof roll production line | |
| CN206289211U (en) | A kind of device that can carry out Low Water Consumption Coke Quenching | |
| CN206104446U (en) | Diamond separation cleaning machine | |
| CN201121136Y (en) | Equipment for roasting to produce cobaltic-cobaltous oxide powder with spray | |
| CN211140746U (en) | Novel blanking device for sponge iron ingot unloading machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090114 |