CN106311719A - Recycling method for carbide slag - Google Patents
Recycling method for carbide slag Download PDFInfo
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- CN106311719A CN106311719A CN201610703783.9A CN201610703783A CN106311719A CN 106311719 A CN106311719 A CN 106311719A CN 201610703783 A CN201610703783 A CN 201610703783A CN 106311719 A CN106311719 A CN 106311719A
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- China
- Prior art keywords
- carbide slag
- water
- carbide
- slag
- recoverying
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- 239000002893 slag Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002351 wastewater Substances 0.000 claims abstract description 25
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 15
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011574 phosphorus Substances 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 10
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 7
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 5
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 239000010452 phosphate Substances 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 5
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 12
- 239000006210 lotion Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical group CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000005708 Sodium hypochlorite Substances 0.000 claims 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims 1
- 238000006386 neutralization reaction Methods 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract 1
- 235000010215 titanium dioxide Nutrition 0.000 description 14
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000001669 calcium Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a recycling method for carbide slag. The recycling method comprises the following steps of (1) filtering, (2) washing, (3) neutralizing and (4) oxidizing. The carbide slag generated in the PVC production process is pulped and filtered; after being washed to be qualified, the carbide slag is used for neutralization of titanium dioxide acid wastewater; and meanwhile, obtained carbide slag filter liquor and washing liquor are directly used for water for a phosphate production process after being subjected to oxidation treatment. The method has the beneficial effects that COD, P and ammonia nitrogen contaminants, generated by liquid carried by the carbide slag, are chemically converted and recycled in an environment-friendly manner, meanwhile, the purified carbide slag is used for neutralization of the titanium dioxide acid wastewater, generated drained water completely meets the drainage requirement of the state for the titanium dioxide industry, zero total phosphorus emission, zero COD emission and zero ammonia nitrogen emission are achieved, and the dual significance in economy and environment protection is achieved.
Description
Technical field
The present invention relates to the recoverying and utilizing method of a kind of carbide slag, belong to waste residue environmental protection and recycle field.
Background technology
Titanium dioxide is the most optimal Chinese white, is widely used in the industries such as coating, plastics, ink, daily use chemicals, titanium dioxide
Production technology can be divided into sulfuric acid process and chloridising, and Production By Sulfuric Acid Process technique is relatively broad in China's application.Sulfate process titanium dioxide
Powder can produce substantial amounts of acid waste water, according to statistics, often produces 1t titanium dioxide and can produce waste water 100～150t, currently mainly use
This waste water of Calx neutralisation treatment, first by lime slaking, makes calcium hydroxide emulsion, is then added in acid waste water producing
Raw calcium sulfate precipitation, makes the Fe in waste water in N-process simultaneously by stirring2+Change into Fe3+, generate Fe (OH)3Heavy
Form sediment, thus reduce Fe, the COD in waste water, finally make waste water reach discharge standard requirement.Carbide slag results from chlor-alkali industry, its
Main component is exactly calcium hydroxide, and the process of carbide slag is also a relatively difficult problem at chlor-alkali industry, to some chlorine
Find when alkali enterprise investigates that the carbide slag of major part enterprise can not effectively process and dispose, environment is caused certain
Impact, carbide slag main component is calcium hydroxide, can use as acid waste water neutralization reagent in theory and virtually completely.
Carbide slag, carbide hydrolysis obtains the waste residue with calcium hydroxide as main component after acetylene gas, acetylene (C2H2) it is base
One of important source material of this organic synthesis industry, with carbide (CaC2) it is raw material, the technique that add water (wet method) produces acetylene is simple
Maturation, accounts for larger specific gravity in China at present.1t carbide adds water and can generate kg acetylene gas more than 300, generates 10t solid content about simultaneously
The industrial wastes of 12%, is commonly called as carbide slag slurries.Due to carbide slag contaminant problem, therefore containing H in carbide slag supernatant fluid2S, PH3,
And NH3Deng major pollutants.Carbide slag often due to eat liquid phenomenon during solid-liquid separation, carry about 60% PVC raw
Product system waste water (supernatant), this waste water contains typical pollutant: P～1000ppm；COD～15000ppm, N～1000ppm,
If directly carbide slag is used as the nertralizer of titanium dioxide acid waste water, owing to wastewater from TiO2 factory removing with nothing in technique
PH3, except H2S, except the technique of the pollutant such as ammonia nitrogen, can directly result in titanium white production discharge water and not meet titanium white production country
Standard (without zero total phosphorus discharge, zero COD discharge, zero ammonia nitrogen discharge), if the technology of newly-increased fall pollutant and facility, necessarily improves
Neutralization expense, the low-cost advantage of carbide slag there will be no, and the chemical reaction related to is as follows:
CaO+H2O Ca (OH)2
CaS+2H2O Ca (OH)2+H2S↑
Ca3N2+6H2O 3Ca (OH)2+2NH3↑
Ca3P2+6H2O 3Ca (OH)2+2PH3↑
Summary of the invention
For the problem of the existence of prior art, the present invention provides the recoverying and utilizing method of a kind of carbide slag.
Technical scheme is as follows:
A kind of carbide slag recoverying and utilizing method, comprises the following steps:
(1) filter: the making beating that added water by carbide slag is filtered after processing, and obtains a carbide blob of slag and filtrate；
(2) washing: add water washing by a carbide blob of slag, obtains water lotion and carbide slag solid, when total phosphorus, ammonia in water lotion
When nitrogen, the concentration of tri-kinds of materials of COD are respectively less than 0.1ppm, stop washing；
(3) neutralize: the slurrying that added water by step (2) carbide slag solid is for neutralizing titanium dioxide acid waste water；
(4) oxidation: by step (1) and (2) filtrate and water lotion mixing, after addition oxidizer treatment, be directly used in phosphoric acid
Technology of threonates water, phosphate production water almost only requires mud ＜ 0.1g/L, and calcium class solid does not affect production.
Step (1) filter type is filter pressing, water-soluble to reduce total phosphorus in a carbide blob of slag, ammonia nitrogen, COD tri-kinds as far as possible
The content of property material, the mass ratio of carbide slag and water is 1:1～20.
Step (2) water-washing process needs three kinds of materials content in water lotion is monitored in real time, normal conditions
Under, total phosphorus, ammonia nitrogen, COD are respectively adopted Na Shi reagent spectrophotography, P-Mo blue spectrophotography, potassium dichromate method are examined
Survey, when total phosphorus, ammonia nitrogen, the concentration of tri-kinds of materials of COD are respectively less than 0.1ppm in water lotion, three kinds of materials in a carbide blob of slag are described
Content extremely low, meet neutralize industrial acidic wastewater environmental protection standard, now can stop washing, carry out step (3) and step
(4)。
Step (3) carbide slag slurrying can also be used for neutralizing containing sulphuric acid, the industrial acidic wastewater of hydrochloric acid, even if containing in waste water
Precipitable metal-oxide is had to nor affect on neutralization, total phosphorus, ammonia nitrogen, the content of tri-kinds of materials of COD in starching due to carbide
Extremely low, the acid waste water after therefore neutralizing directly can discharge without processing further.
In step (4), mixed liquor is 100:1～20 with the mass ratio of oxidant.
Oxidant in step (4) is the one in hypochlorite, chlorate or hydrogen peroxide；Described hypochlorite is secondary
Sodium chlorate or postassium hypochlorite, described chlorate is sodium chlorate or potassium chlorate.
Beneficial effect
The present invention by PVC production process produce carbide slag slurrying, filtration, wash qualified after for titanium dioxide spent acidic
The neutralization of water, is directly used in the carbide slag filtrate obtained and washing liquid phosphate production technique simultaneously after oxidation processes and uses
Water, the method advantage be the COD (predominantly sulfide) that not only caused by carbide slag, P and the dirt of ammonia nitrogen owing to eating liquid
Dye thing is reclaimed by chemical conversion environmental protection, and the carbide slag after simultaneously purifying, for the neutralization of titanium dioxide acid waste water, produces discharge
Water complies fully with country's drainage requirement to titanium dioxide industry, zero total phosphorus discharge, zero COD discharge, zero ammonia nitrogen discharge, have through
Ji, environmental protection double meaning, this invention is more environmentally-friendly effectively make use of carbide slag, the process that have found acid waste water is more economical,
Rationally, the mode of environmental protection, simultaneously the most also recycling again for carbide slag is paved the way.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is described in further detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit
In the present invention.
Embodiment 1
(1) weigh 1kg carbide slag, add 10kg fresh water and carry out making beating process, filter, obtain a carbide blob of slag and filtrate；
(2) add water washing by a carbide blob of slag, obtains water lotion and carbide slag solid, when total phosphorus, ammonia nitrogen, tri-kinds of materials of COD in water lotion
Concentration when being respectively less than 0.1ppm, stop washing；(3) step (2) carbide slag solid is added water slurrying for neutralizing titanium dioxide acid
Property waste water, and detect and neutralize the pH that discharges water of heel row, total P, ammonia nitrogen, COD；(4) by step (1) and (2) filtrate and washing liquid mixing, add
Enter 100ml hydrogen peroxide (30%) to process, after being sufficiently stirred for, be directly used in phosphate production process water.
Embodiment 2
Weigh 1kg carbide slag, add 10kg fresh water and pull an oar, be directly used in titanium dioxide acid waste water
With, and detect the pH that neutralization heel row discharges water, total P, ammonia nitrogen, COD.
The water Testing index of table 1. embodiment 1,2
Claims (7)
1. a carbide slag recoverying and utilizing method, it is characterised in that comprise the following steps:
(1) filter: the making beating that added water by carbide slag is filtered after processing, and obtains a carbide blob of slag and filtrate；
(2) washing: add water washing by a carbide blob of slag, obtains water lotion and carbide slag solid, as total phosphorus, ammonia nitrogen, COD in water lotion
When the concentration of three kinds of materials is respectively less than 0.1ppm, stop washing；
(3) neutralize: the slurrying that added water by step (2) carbide slag solid is for neutralizing titanium dioxide acid waste water；
(4) oxidation: by step (1) and (2) filtrate and water lotion mixing, after adding oxidizer treatment, be directly used in phosphate and give birth to
Production. art water.
A kind of carbide slag recoverying and utilizing method the most according to claim 1, it is characterised in that step (1) carbide slag and water
Mass ratio be 1:1～20.
A kind of carbide slag recoverying and utilizing method the most according to claim 1, it is characterised in that the oxidant in step (4)
For the one in hypochlorite, chlorate or hydrogen peroxide.
4. according to a kind of carbide slag recoverying and utilizing method described in claim 1 or 3, it is characterised in that described hypochlorite
For sodium hypochlorite or postassium hypochlorite.
5. according to a kind of carbide slag recoverying and utilizing method described in claim 1 or 3, it is characterised in that described chlorate is
Sodium chlorate or potassium chlorate.
A kind of carbide slag recoverying and utilizing method the most according to claim 1, it is characterised in that step (3) carbide slag slurrying
For neutralizing containing sulphuric acid, the industrial acidic wastewater of hydrochloric acid.
A kind of carbide slag recoverying and utilizing method the most according to claim 1, it is characterised in that in step (4) mixed liquor with
The mass ratio of oxidant is 100:1～20.
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| CN201610703783.9A CN106311719B (en) | 2016-08-22 | 2016-08-22 | A kind of recoverying and utilizing method of carbide slag |
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| CN201610703783.9A CN106311719B (en) | 2016-08-22 | 2016-08-22 | A kind of recoverying and utilizing method of carbide slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455533A (en) * | 2018-05-24 | 2018-08-28 | 汶川县湘宁氯酸盐有限责任公司 | The method that calcium carbide waste slag produces potassium chlorate |
| CN108585281A (en) * | 2018-05-16 | 2018-09-28 | 四川龙蟒钛业股份有限公司 | A method of reducing efflux wastewater phosphorus content |
| CN112386962A (en) * | 2020-11-26 | 2021-02-23 | 河南佰利联新材料有限公司 | Method for increasing sedimentation velocity of thickening tank |
| CN113912234A (en) * | 2021-10-27 | 2022-01-11 | 龙佰禄丰钛业有限公司 | Method for treating sewage generated by producing titanium dioxide by chlorination process |
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| CN108585281A (en) * | 2018-05-16 | 2018-09-28 | 四川龙蟒钛业股份有限公司 | A method of reducing efflux wastewater phosphorus content |
| CN108455533A (en) * | 2018-05-24 | 2018-08-28 | 汶川县湘宁氯酸盐有限责任公司 | The method that calcium carbide waste slag produces potassium chlorate |
| CN112386962A (en) * | 2020-11-26 | 2021-02-23 | 河南佰利联新材料有限公司 | Method for increasing sedimentation velocity of thickening tank |
| CN113912234A (en) * | 2021-10-27 | 2022-01-11 | 龙佰禄丰钛业有限公司 | Method for treating sewage generated by producing titanium dioxide by chlorination process |
| CN113912234B (en) * | 2021-10-27 | 2023-10-17 | 龙佰禄丰钛业有限公司 | Sewage treatment method for producing titanium dioxide by using chlorination process |
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