CN105271436B - The method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid - Google Patents

The method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid Download PDF

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CN105271436B
CN105271436B CN201510673291.5A CN201510673291A CN105271436B CN 105271436 B CN105271436 B CN 105271436B CN 201510673291 A CN201510673291 A CN 201510673291A CN 105271436 B CN105271436 B CN 105271436B
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sludge
solution
ferric chloride
hydrochloric acid
mass concentration
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CN201510673291.5A
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CN105271436A (en
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刘阳生
施荣标
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刘阳生
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Abstract

The invention discloses a kind of method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and abraum salt.Methods described dissolves steel wire rope pickling sludge by waste hydrochloric acid, removes the lead ion in lysate with sulphide precipitation, obtains poly ferric chloride flocculant agent;Caused hydrogen sulfide gas meets country on emission standard for odor pollutants, while realize that overall process element sulphur recycles after falling film absorption, packed tower are absorbed and charcoal absorption is handled;By adding cement solidification in sludge residue, the solidification and stabilization of heavy metal is realized.Methods described is more than 90% to the rate of recovery of iron in sludge, and caused poly ferric chloride flocculant agent is excellent for the purifying property of sanitary sewage, and caused vulcanized lead reaches technical purity requirement, can be used as the raw material of industry.The present invention realizes the harmlessness disposing and recycling of steel wire rope pickling sludge and waste hydrochloric acid simultaneously.

Description

The method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid
Technical field
The invention belongs to chemical waste harmless treatment and recycling field, be related to it is a kind of using steel wire rope sludge and The method that waste hydrochloric acid prepares poly ferric chloride flocculant agent.
Background technology
A large amount of acid waste waters are produced in steel wire rope production, essentially from pickling and phosphatization production process, are included a large amount of Heavy metal element, such as iron, lead and zinc, method of wastewater treatment mainly use hydroxide precipitation method.With milk of lime or hydroxide Sodium adds waste water, heavy metal is generated hydroxide not soluble in water by neutralization and precipitate to divide as alkaline precipitating agent From these sediments of formation are steel wire rope pickling sludge, and sludge is disposed after plate compression.
According to investigations, sludge yield of the 1 ton of waste water after processing is about at 0.02 ton or so, moisture content more than 80%.According to 40,000,000 tons of China's wire rope enterprise year waste discharge total amount is counted, and annual caused sludge quantity is up to 800,000 tons in area(Moisture content 80%).At present, small part sludge is deposited in the factory building of each manufacturer, and most of sludge is toppled over and filled by unordered, Environment is caused greatly to pollute.The handling problems of steel wire rope sludge turn into the subject matter for influenceing the existence of steel wire rope industry, draw Play domestic and international scientific research personnel's extensive concern.
Steel wire rope pickling sludge belongs to the hazardous waste of the strict management and control of country.Mainly there are two kinds of processing methods at present:Cement Solidification and stabilization and high-temperature gasification remove lead.Using cement solidification stabilization method, not only cost of disposal is higher, and takes and fill out Bury place.By adding chloride in sour mud(Such as calcium chloride, iron chloride), can be removed by gasification process at high temperature Lead in sour mud, sour mud is converted into Ordinary solid waste, then carry out landfill stabilization.Both the above method is according to discarded object The thinking processing steel wire rope sludge of disposal, does not make full use of for iron, the metallic element such as aluminium contained in sludge, not only wastes Resource, but also to take landfill place.
In addition, the method for salt acid elution is generally used during metal material processing removes surface metal oxide, Produce the largely low concentration waste hydrochloric acid containing heavy metal(The mass concentration of hydrochloric acid is 3 ~ 12%), especially leaded waste hydrochloric acid, place Reason is got up extremely difficult.Domestic processing method is segmented into two major classes substantially at present:
The first kind is handled as waste water:In being carried out using alkaline materials such as lime, sodium carbonate or sodium hydroxides With it is rear, then carry out wastewater treatment.This mode produces the largely waste residue containing heavy metal lead, belongs to hazardous waste, it is necessary to carry out Security landfill again after solidification and stabilization, is also easy to produce secondary pollution, and cost is higher.
Second class is recovery hydrochloric acid and iron.Main recovery technology includes:(1)Oxidizing roasting method.Waste hydrochloric acid is sprayed into 600 DEG C Stove in, Fe2O3Excluded from furnace bottom, hydrogen chloride gas is back to pickling process after water absorbs.The investment of the technology is big, fortune Row cost is high, and the Fe generated2O3Second-rate, there is problem in market sale.(2)Vacuum distillation crystallisation.By waste hydrochloric acid pump Enter circulating evaporator, waste hydrochloric acid starts to evaporate at 102 DEG C, separation water and hydrochloric acid into rectifier, concentrate low temperature after evaporation Crystallization, centrifugal dehydration, product FeCl2Crystalline hydrate.The investment of the technology is big, and operating cost is high, and FeCl2Also need To be further FeCl with chlorine oxidation3.(3)Sulfate substitution method.Using the concentrated sulfuric acid as dehydrating agent, by dilute salt in distillation still Acid cements out, and it is ferric sulfate that ferrous sulfate is passed through oxygen high-temperature oxydation under sulfuric acid catalysis.The subject matter of the technology is dense The dosage of sulfuric acid is big, and sulfuric acid iron speciation only has 50% or so, it is necessary to further evaporate in the mother liquor after ferric sulfate crystallization The replacement process of watery hydrochloric acid is back to after concentration again, energy consumption is larger.
Patent application disclosed in August in 2015 19 days " it is a kind of steel wire rope is processed in caused abraum salt acid and alkaline The method that sludge carries out integrated treatment "(The A of application publication number CN 104843957), main contents include:" steel wire rope is processed During caused waste hydrochloric acid be added in steel wire rope process in caused alkaline sludge, be then stirred, fill it Divide reaction to form the suspension containing a small amount of acid non-soluble substance, stop stirring when the pH value in suspension no longer changes, then A small amount of acid non-soluble substance in suspension is removed by filtration, so as to obtain the acid filtrate containing various metals ion, acidity filter The pH value of liquid is controlled in the range of 0 ~ 1." waste hydrochloric acid and sludge simply simply carries out mixed dissolution, steel wire by the patented technology The heavy metal ion lead that is rich in is not eliminated in rope pickling sludge and waste hydrochloric acid, thus this patent of invention obtain it is final Product is the highly acid waste liquid rich in heavy metal ion lead, and according to National Hazard waste judging standard, the highly acid waste liquid is still Belong to hazardous waste, it is necessary to the ability qualified discharge after further detoxification and advanced treating, do not realize steel wire rope acid Wash harmless treatment and the recycling of sludge and waste hydrochloric acid.
The content of the invention
For overcome the deficiencies in the prior art, the present invention provides one kind and prepares polymerization chlorine using steel wire rope sludge and waste hydrochloric acid Change the method for ferric flocculant, can both realize the innoxious and minimizing of steel wire rope pickling sludge and waste hydrochloric acid, and can also realize The purpose of its recycling.
To solve the above problems, the present invention adopts the following technical scheme that:
Using waste hydrochloric acid as metal ion iron, calcium and lead in extractant extraction steel wire rope pickling sludge, pass through vulcanization The thing precipitation method remove the lead ion in extract solution, aggregated reaction and curing, are processed further obtaining poly ferric chloride flocculant agent; Caused hydrogen sulfide gas meets that country is dirty on stench after falling film absorption, packed tower are absorbed and charcoal absorption is handled The requirement of thing discharge standard is contaminated, while reclaims sulfide, realizes recycling for overall process element sulphur;Caused vulcanized lead purity It is suitable with industrial vulcanized lead purity, it can be used as the raw material of industry;By adding cement solidification in sludge residue, heavy metal is realized Solidification and stabilization.
Concretely comprise the following steps:
1), with abraum salt acid extraction metal in sludge ion prepare extract solution:According to sludge:Waste hydrochloric acid=1:2 ~ 10 quality Than the sludge of moisture content 75 ~ 80% being added in the abraum salt acid solution that mass concentration is 5 ~ 20%, stirring reaction 30 ~ 60 minutes, warp Plate compression removes sludge residue, obtains extract solution;
2), from extract solution remove lead ion prepare ferric chloride solution:According to sulfide solution:Extract solution=1:5 ~ 10 Volume ratio, the sulfide solution that mass concentration is 10 ~ 20% is gradually added dropwise in extract solution, continues stirring reaction after being added dropwise 30 ~ 60 minutes, discharging stood 1 ~ 3 hour, supernatant then is pumped into ferric chloride solution storage tank, supernatant to tank is staticly settled Through plate compression, mud cake is removed, filtrate pump enters to stand settling tank;
3), prepare poly ferric chloride flocculant agent:By ferric chloride solution after bag filter removes fine suspension, root According to the mass concentration of iron ion in solution, decide whether to add ferric trichloride so that the mass concentration of iron ion is not low in solution In 11%;The pH value of ferric chloride solution is adjusted with the alkaline solution that mass concentration is 10 ~ 30% again to 2.5 ~ 3.5, curing 72 ~ 96 is small When, obtain poly ferric chloride flocculant agent;
4), hydrogen sulfide gas purification:Substantial amounts of hydrogen sulfide gas is produced in sulfide solution and waste hydrochloric acid course of reaction, Gas production is 70 ~ 200m3/h.Hydrogen sulfide gas is evacuated to by falling-film absorber by vavuum pump, come out using from packed absorber Phegma as H2S SCAVENGER, 3 ~ 30 minutes residence times;The hydrogen sulfide gas come out from falling-film absorber, by filling out Expect that absorption tower absorbs, it is 10 ~ 30% alkaline solution as absorbing liquid, 10 ~ 30 minutes residence times to use mass concentration;From filling out Expect gas that absorption tower comes out after demister removes wet fog, into activated carbon adsorber processing, tail gas through chimney qualified discharge, Meet《Emission standard for odor pollutants》(GB 14554-1993)In secondary discharge standard(< 0.06 mg/m3)It is required that;Its In, using fresh alkaline solution as absorbent in packed absorber, the phegma come out from packed absorber is used further to drop Hydrogen sulfide gas is absorbed in film absorber, obtains sulfide solution after absorbing saturation, the sulfide solution is reused for waste hydrochloric acid Neutralization and lead precipitation reaction, so as to realize recycling for overall process element sulphur;
5), sludge residue and mud cake processing:According to cement:Sludge residue=1:5 ~ 20 mass ratio, cement is added into sheet frame In sludge residue caused by press filtration, stir, be processed into cement block, conserve 28 hours, the heavy metal lead in sludge residue It is cured stabilisation with zinc, turns into inert solid, mud cake caused by plate compression is dense containing quality in gained butt after drying The vulcanized lead for 96 ~ 98% is spent, it is suitable with industrial vulcanized lead purity, it can be used as the raw material of friction material and alloy material.
Total weight of iron concentration is 10 ~ 15% in sludge of the present invention, and total lead mass concentration is 1000 ~ 3000 ppm, calcium from Protonatomic mass concentration is 10 ~ 16%;The mass concentration of hydrochloric acid is 3 ~ 15% in the waste hydrochloric acid, and lead ion mass concentration is 100 ~ 3000 Ppm, iron ion mass concentration are 5 ~ 15%;The sulfide is one kind in vulcanized sodium, potassium sulfide, NaHS, potassium bisulfide It is or a variety of.
The beneficial effects of the invention are as follows:
(1)Iron recovery in sour mud is more than 90%;
(2)Fe mass concentration >=11% in poly ferric chloride flocculant agent, lead ion mass concentration< 5 ppm;
(3)Poly-ferric & aluminum flocculants are excellent for the purifying property of sanitary sewage.Primary 200 ~ 300NTU of turbidity of sewage living, CODCr400 ~ 800mg/L, 20 ~ 40mg/L of ammonia nitrogen, 3 ~ 5mg/L of total phosphorus, after processing, turbidity reduction 95 ~ 98%, CODCr, ammonia nitrogen Clearance with total phosphorus is respectively 75 ~ 80%, 75 ~ 85% and 80 ~ 85%.
(4)The harmlessness disposing and recycling of steel wire rope pickling sludge and waste hydrochloric acid are realized simultaneously.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the technique stream of the present invention that poly ferric chloride flocculant agent is prepared using steel wire rope pickling sludge and waste hydrochloric acid Cheng Tu.
In figure:1. steel wire rope pickling sludge, 2. extractive reaction tanks, 3. plate and frame filter press, 4. sludge residues, 5. remove Lead retort, 6. sulfide solutions, 7. staticly settle tank, 8. ferric chloride solution storage tanks, 9. settling tank bed muds, 10. sheet frames Filter press, 11. vulcanized lead mud cakes, 12. sheet frame filtrates, 13. bag filters, 14. flocculant reactors, 15. flocculants Curing tank, 16. hydrogen sulfide gas, 17. vavuum pumps, 18. falling-film absorbers, 19. packed absorbers, 20. demisters, 21. Activated carbon adsorber, 22. packed tower phegmas, 23. falling-film absorber phegmas, 24. chimneys.
Embodiment
Embodiment 1
Referring to Fig. 1, by 2000L waste hydrochloric acids(The mass concentration of hydrochloric acid is 13%, and the mass concentration of lead ion is 1620 ppm, The mass concentration of iron ion is 9.7%)Add in extractive reaction tank 2, add 1000kg steel wire rope pickling sludge(Moisture content 76.8%, the mass concentration of iron ion is 10.8%, and the mass concentration of lead ion is 2000 ppm)1, stirring reaction 30 minutes, warp After plate and frame filter press 3 removes sludge residue 4, filtrate, which enters, removes in lead retort 5, and it is 17% that 260 L mass concentrations, which are gradually added dropwise, Sodium sulfide solution 6, continues stirring reaction 30 minutes after being added dropwise, discharging stands 2 hours to tank 7 is staticly settled, then will be upper Clear liquid is pumped into ferric chloride solution storage tank 8, and settling tank bed mud 9 obtains vulcanized lead mud cake 11, sheet frame filter through the press filtration of plate and frame filter press 10 Liquid 12, which is pumped into, staticly settles tank 7.
(1)It is prepared by poly ferric chloride flocculant agent:Ferric chloride solution is removed into fine suspension through bag filter 13, entered Flocculant reactor 14, add 42 kg FeCl3Powder, stirring, dissolving, then add the hydrogen-oxygen that 23 L mass concentrations are 16% Change sodium solution and adjust pH value to 2.8, continue stirring 30 minutes, discharging, be pumped into flocculant curing tank 15, it is small through curing 72 naturally When, obtain poly ferric chloride flocculant agent.
(2)Hydrogen sulfide gas purifies:Substantial amounts of hydrogen sulfide gas is produced in sodium sulfide solution and waste hydrochloric acid course of reaction 16, gas production rate is 175 m3/h.Hydrogen sulfide gas 16 is evacuated to by falling-film absorber 18 by vavuum pump 17, using packing material absorbing The reflux solution 22 of tower 19 is used as H2S SCAVENGER, 5 minutes residence times;The stink damp come out from falling-film absorber 18 Body, absorbed by packed absorber 19, it is 15% sodium hydroxide solution as absorbing liquid, residence time 10 to use mass concentration Minute, then after demister 20 removes wet fog, handled into activated carbon adsorber 21, tail gas is full through the qualified discharge of chimney 24 Foot《Emission standard for odor pollutants》(GB 14554-1993)In secondary discharge standard(< 0.06 mg/m3)It is required that.Wherein, From the phegma 23 that falling-film absorber 18 comes out as the sodium sulfide solution 6 required for lead precipitation in waste hydrochloric acid.
Embodiment 2
Referring to Fig. 1, by 2000L waste hydrochloric acids(The mass concentration of hydrochloric acid is 5%, and the mass concentration of lead ion is 320ppm, iron The mass concentration of ion is 9%)Add in extractive reaction tank 2, add 1000kg steel wire rope pickling sludge(Moisture content 80%, iron from The mass concentration of son is 11.5%, and the mass concentration of lead ion is 2300 ppm)1, stirring reaction 50 minutes, through plate and frame filter press 3 After removing sludge residue 4, filtrate, which enters, removes in lead retort 5, and the potassium sulfide solution that 230 L mass concentrations are 10% is gradually added dropwise 6, continue stirring reaction after being added dropwise 45 minutes, discharging stands 3 hours, supernatant then is pumped into chlorine to tank 7 is staticly settled Change ferrous solution storage tank 8, settling tank bed mud 9 obtains vulcanized lead mud cake 11, it is heavy that filtrate 12 is pumped into standing through the press filtration of plate and frame filter press 10 Shallow lake tank 7.
(1)It is prepared by poly ferric chloride flocculant agent:Ferric chloride solution is removed into fine suspension through bag filter 13, entered Flocculant reactor 14, add 42 kg FeCl3Powder, stirring, dissolving, then add the hydrogen-oxygen that 18 L mass concentrations are 15% Change potassium solution and adjust pH value to 3.5, continue stirring 30 minutes, discharging, be pumped into flocculant curing tank 15, it is small through curing 96 naturally When, obtain poly ferric chloride flocculant agent.
(2)Hydrogen sulfide gas purifies:Substantial amounts of hydrogen sulfide gas is produced in potassium sulfide solution and waste hydrochloric acid course of reaction 16, gas production rate is 72 m3/h.Hydrogen sulfide gas 16 is evacuated to by falling-film absorber 18 by vavuum pump 17, using packing material absorbing The reflux solution 22 of tower 19 is used as H2S SCAVENGER, 5 minutes residence times;The stink damp come out from falling-film absorber 18 Body, absorbed by packed absorber 19, use mass concentration to divide for 20% solution of potassium carbonate as absorbing liquid, residence time 28 Clock, then after demister 20 removes wet fog, handled into activated carbon adsorber 21, tail gas meets through the qualified discharge of chimney 24 《Emission standard for odor pollutants》(GB 14554-1993)In secondary discharge standard(< 0.06 mg/m3)It is required that.Wherein, from The phegma 23 that falling-film absorber 18 comes out is as the potassium sulfide solution 6 required for lead precipitation in waste hydrochloric acid, it is achieved thereby that entirely Process element sulphur recycles.
Embodiment 3:Use example
The poly ferric chloride flocculant agent prepared in embodiment 1 is used for sanitary sewage disposal.In 1 m3Add in sanitary sewage Enter 1.5 kg poly ferric chloride flocculant agents, stir 5 minutes, standing sedimentation 30 minutes, sampling and testing sanitary sewage disposal effect.Place Before reason, sanitary sewage turbidity 240.6 NTU, CODCr656.6 mg/L, the mg/L of ammonia nitrogen 30.9, the mg/L of total phosphorus 3.6, through processing Afterwards, turbidity reduction 97%, CODCr, ammonia nitrogen and total phosphorus clearance be respectively 79.5%, 81.2% and 81%.
Finally it should be noted that:Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn Among the obvious changes or variations of stretching is still in protection scope of the present invention.

Claims (2)

  1. A kind of 1. method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid, it is characterised in that:The side Method extracts the metal ion in steel wire rope pickling sludge using waste hydrochloric acid as extractant, is removed and extracted by sulphide precipitation Lead ion in liquid, aggregated reaction and curing, is processed further obtaining poly ferric chloride flocculant agent;Caused hydrogen sulfide gas After falling film absorption, packed tower are absorbed and charcoal absorption is handled, meet that country wants on emission standard for odor pollutants Ask, while reclaim sulfide, realize recycling for overall process element sulphur;Caused vulcanized lead purity and industrial vulcanized lead purity Quite, it can be used as the raw material of industry;By adding cement solidification in sludge residue, the solidification and stabilization of heavy metal is realized;
    It the described method comprises the following steps:
    1), extract solution is prepared with abraum salt acid extraction metal in sludge ion:According to sludge:Waste hydrochloric acid=1:2~10 mass ratio, The sludge of moisture content 75~80% is added in the abraum salt acid solution that mass concentration is 5~20%, stirring reaction 30~60 minutes, Sludge residue is removed through plate compression, obtains extract solution;
    2) lead ion, is removed from extract solution and prepares ferric chloride solution:According to sulfide solution:Extract solution=1:5~10 body Product ratio, the sulfide solution that mass concentration is 10~20% is gradually added dropwise in extract solution, continues stirring reaction after being added dropwise 30~60 minutes, discharging stood 1~3 hour, supernatant then is pumped into ferric chloride solution storage tank to tank is staticly settled, and precipitates Tank bottom mud removes mud cake, filtrate pump enters to stand settling tank through plate compression;
    3) poly ferric chloride flocculant agent, is prepared:By ferric chloride solution after bag filter removes fine suspension, according to molten The mass concentration of iron ion in liquid, decide whether to add ferric trichloride so that the mass concentration of iron ion is not less than in solution 11%, then the pH value of ferric chloride solution is adjusted to 2.5~3.5 with the alkaline solution that mass concentration is 10~30%, curing 72~ 96 hours, obtain poly ferric chloride flocculant agent;
    4), hydrogen sulfide gas purifies:By vavuum pump by caused stink damp in sulfide solution and waste hydrochloric acid course of reaction Body is evacuated to falling-film absorber, using the phegma come out from packed absorber as H2S SCAVENGER, 3~30 points of residence time Clock, from falling-film absorber come out hydrogen sulfide gas, absorbed by packed absorber, use mass concentration for 10~30% alkali Property solution as absorbing liquid, 10~30 minutes residence times, from the gas that packed absorber comes out after demister removes wet fog, Into activated carbon adsorber processing, tail gas meets through chimney qualified discharge《Emission standard for odor pollutants》In two level discharge Standard requirement, wherein, using fresh alkaline solution as absorbent in packed absorber, the backflow come out from packed absorber Liquid is used further to absorb hydrogen sulfide gas in falling-film absorber, obtains sulfide solution after absorbing saturation, the sulfide solution is again For waste hydrochloric acid neutralization and lead precipitation reaction, so as to realize recycling for overall process element sulphur;
    5), sludge residue and mud cake processing:According to cement:Sludge residue=1:5~20 mass ratio, cement is added into sheet frame pressure In sludge residue caused by filter, stir, be processed into cement block, conserve 28 hours, the heavy metal in sludge residue is consolidated Change stabilize, turn into inert solid, mud cake caused by plate compression after drying gained butt in containing mass concentration be 96~ 98% vulcanized lead, it is suitable with industrial vulcanized lead purity, it can be used as the raw material of friction material and alloy material;
    Total weight of iron concentration is 10~15% in the sludge, and total lead mass concentration is 1000~3000ppm, and calcium ion quality is dense Spend for 10~16%;In the waste hydrochloric acid mass concentration of hydrochloric acid be 3~15%, lead ion mass concentration be 100~ 3000ppm, iron ion mass concentration are 5~15%;
    The sulfide is the one or more in vulcanized sodium, potassium sulfide, NaHS, potassium bisulfide.
  2. 2. a kind of method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid as claimed in claim 1, It is characterized in that:Methods described is more than 90% for the iron recovery in sludge;Purification of the flocculant for sanitary sewage Excellent performance, primary 200~300NTU of turbidity of sewage, COD livingCr400~800mg/L, 20~40mg/L of ammonia nitrogen, total phosphorus 3~ 5mg/L, after processing, turbidity reduction 95~98%, CODCr, ammonia nitrogen and total phosphorus clearance be respectively 75~80%, 75~ 85% and 80~85%.
CN201510673291.5A 2015-10-19 2015-10-19 The method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid CN105271436B (en)

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CN105198122A (en) * 2015-10-26 2015-12-30 刘阳生 Resource utilization method of waste hydrochloric acid containing heavy metal lead and iron
CN107434315B (en) * 2016-11-17 2019-11-26 江苏德昶环保科技有限公司 A kind of method of leaded zinc wirerope sludge and leaded waste hydrochloric acid integrated treatment
CN107200449B (en) * 2017-06-23 2020-09-04 江苏荣信环保科技有限公司 Method for recycling sludge in steel wire rope production
CN107098556B (en) * 2017-06-23 2020-04-10 江苏荣信环保科技有限公司 Method for recycling metal from sludge in steel wire rope production
CN108358409A (en) * 2018-03-07 2018-08-03 江苏天楹环保能源成套设备有限公司 A kind of steel wire rope sludge and spent acid method for innocent treatment
CN108383272A (en) * 2018-03-07 2018-08-10 江苏天楹环保能源成套设备有限公司 A kind of sludge recovery treatment method of waste acid that wire rope factory generates

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CN100554178C (en) * 2008-01-21 2009-10-28 合肥工业大学 A kind of production method of inorganic macromolecule flocculant poly aluminium chloride ferrum
CN101618892B (en) * 2009-07-31 2011-06-08 东南大学 Recovery and comprehensive utilization method of heavy metals in stainless steel pickling wastewater sludge
CN102502747A (en) * 2011-11-30 2012-06-20 东南大学 Method for preparing polyferric chloride flocculant by a double catalytic oxidation process and application of flocculant
CN104843957A (en) * 2015-05-27 2015-08-19 李绍国 Method for comprehensively treating waste hydrochloric acid and alkaline sludge generated in steel wire rope processing process

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