CN106311719B - A kind of recoverying and utilizing method of carbide slag - Google Patents
A kind of recoverying and utilizing method of carbide slag Download PDFInfo
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- CN106311719B CN106311719B CN201610703783.9A CN201610703783A CN106311719B CN 106311719 B CN106311719 B CN 106311719B CN 201610703783 A CN201610703783 A CN 201610703783A CN 106311719 B CN106311719 B CN 106311719B
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- 239000002893 slag Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 29
- 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 33
- 239000002351 wastewater Substances 0.000 claims abstract description 25
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 13
- 239000006210 lotion Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 11
- 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
- 239000000706 filtrate Substances 0.000 claims abstract description 8
- 229910019142 PO4 Inorganic materials 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
- 239000005997 Calcium carbide Substances 0.000 claims description 12
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 12
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 9
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 230000003472 neutralizing effect Effects 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
- 230000001590 oxidative 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
- 238000005360 mashing 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
- ANFIEGWCRSNVFS-UHFFFAOYSA-N [Na].OCl(=O)=O Chemical group [Na].OCl(=O)=O ANFIEGWCRSNVFS-UHFFFAOYSA-N 0.000 claims 1
- 238000006386 neutralization reaction Methods 0.000 abstract description 9
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 14
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 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
- 125000002534 ethynyl group Chemical group [H]C#C* 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
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 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
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004571 lime 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
- 238000004064 recycling Methods 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 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
- 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
- 229910052791 calcium Inorganic materials 0.000 description 1
- -1 calcium carbides 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
- 239000000356 contaminant Substances 0.000 description 1
- 230000000694 effects Effects 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
- 239000000463 material 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
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 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
- 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
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012463 white pigment Substances 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 present invention discloses a kind of recoverying and utilizing method of carbide slag, includes the following steps：(1) filtering (2) washing (3) neutralizes (4) oxidation.The carbide slag slurrying that the present invention will generate in PVC production processes, filtering, the neutralization of titanium dioxide acid waste water is used for after washing is qualified, obtained carbide slag filtrate and washing lotion are directly used in phosphate production process water after oxidation processes simultaneously, the advantages of this method is the not only COD caused by eating liquid by carbide slag, the pollutant of P and ammonia nitrogen is recycled by chemical conversion environmental protection, purified carbide slag is used for the neutralization of titanium dioxide acid waste water simultaneously, generate the drainage requirement that discharge water complies fully with country to titanium dioxide industry, zero total phosphorus discharges, zero COD is discharged, zero ammonia nitrogen discharges, with economy, environmentally friendly double meaning.
Description
Technical field
The present invention relates to a kind of recoverying and utilizing methods of carbide slag, belong to waste residue environmental protection recycling field.
Background technology
Titanium dioxide is current best white pigment, 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 in China using relatively broad.Sulfate process titanium dioxide
Powder will produce a large amount of acid waste water, and according to statistics, 100~150t of waste water can be generated by often producing 1t titanium dioxides, main at present to use
Calcium hydroxide emulsion is made first by lime slaking in the lime neutralisation treatment waste water, is then added into acid waste water and produces
Raw calcium sulfate precipitation, while the Fe in waste water is made by stirring in N-process2+It is converted to Fe3+, generate Fe (OH)3It is heavy
It forms sediment, to reduce Fe, COD in waste water, waste water is finally made to reach discharge standard requirement.Carbide slag results from chlor-alkali industry,
Main component is exactly calcium hydroxide, and the processing of carbide slag is also a relatively difficult problem in chlor-alkali industry, to some chlorine
It finds that the carbide slag of most of enterprise effectively cannot be handled and be disposed when alkali enterprise is investigated, environment is caused certain
It influences, carbide slag main component is calcium hydroxide, theoretically and virtually completely can be used as the use of acid waste water neutralization reagent.
Carbide slag, calcium carbide hydrolysis obtain acetylene gas after with calcium hydroxide waste residue as main component, acetylene (C2H2) it is base
One of the important source material of this organic synthesis industry, with calcium carbide (CaC2) it is raw material, add the simple for process of water (wet method) production acetylene
Maturation accounts for larger specific gravity in China at present.1t calcium carbides add water to produce kg acetylene gas more than 300, while generating 10t solid contents about
12% industrial wastes, is commonly called as carbide slag slurries.Due to carbide slag contaminant problem, contain H in carbide slag supernatant fluid2S, PH3,
And NH3Equal major pollutants.Carbide slag in separation of solid and liquid process often due to eat liquid phenomenon, the PVC lifes of carrying 60% or so
Production system waste water (supernatant), the waste water contain typical pollutant：P~1000ppm；COD~15000ppm, N~1000ppm,
If directly used carbide slag as the neutralizer of titanium dioxide acid waste water, since nothing is removed in wastewater from TiO2 factory and in technique
PH3, remove H2S can directly result in titanium white production discharge water and not meet titanium white production country except the technique of the pollutants such as ammonia nitrogen
Standard (no zero total phosphorus discharge, zero COD discharges, the discharge of zero ammonia nitrogen), if the technology and facility of newly-increased drop pollutant, are necessarily improved
The low-cost advantage of neutralization expense, carbide slag will be not present, and the chemical reaction being 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↑
Invention content
For the prior art there are the problem of, the present invention provides a kind of recoverying and utilizing method of carbide slag.
Technical scheme is as follows：
A kind of carbide slag recoverying and utilizing method, includes the following steps：
(1) it filters：It will be filtered after carbide slag plus water mashing processing, obtain a calcium carbide blob of slag and filtrate；
(2) it washes：A calcium carbide blob of slag is added into water washing, obtains water lotion and carbide slag solid, when total phosphorus, ammonia in water lotion
Concentration when being respectively less than 0.1ppm of tri- kinds of nitrogen, COD substances, stops washing；
(3) it neutralizes：Add water slurrying for neutralizing titanium dioxide acid waste water step (2) carbide slag solid；
(4) it aoxidizes：Step (1) and (2) filtrate and water lotion are mixed, after oxidizer treatment is added, are directly used in phosphoric acid
Technology of threonates water, phosphate production almost only requires mud ＜ 0.1g/L with water, and calcium class solid does not influence to produce.
Step (1) filter type is press filtration, water-soluble to reduce the total phosphorus in a calcium carbide blob of slag, ammonia nitrogen, tri- kinds of COD as far as possible
Property substance content, the mass ratio of carbide slag and water is 1：1~20.
It needs to monitor content of three kinds of substances in water lotion in real time in step (2) water-washing process, normal conditions
Under, total phosphorus, ammonia nitrogen, COD are respectively adopted Na Shi reagents spectrophotometry, P-Mo blue spectrophotometry, potassium dichromate method and are examined
It surveys, when the concentration of tri- kinds of total phosphorus in water lotion, ammonia nitrogen, COD substances is respectively less than 0.1ppm, illustrates three kinds of substances in a calcium carbide blob of slag
Content it is extremely low, meet the environmental protection standard for neutralizing industrial acidic wastewater, can stop washing at this time, carry out step (3) and step
(4)。
Step (3) carbide slag slurrying can also be used for neutralizing the industrial acidic wastewater containing sulfuric acid, hydrochloric acid, even if containing in waste water
There is precipitable metal oxide to nor affect on neutralization, the content of total phosphorus, tri- kinds of ammonia nitrogen, COD substances in being starched due to calcium carbide
It is extremely low, therefore the acid waste water after neutralization may not need and be further processed, direct emission.
The mass ratio of mixed liquor and oxidant is 100 in step (4)：1~20.
Oxidant in step (4) is hypochlorite, one kind in chlorate or hydrogen peroxide；The hypochlorite is secondary
Sodium chlorate or postassium hypochlorite, the chlorate are sodium chlorate or potassium chlorate.
Advantageous effect
The carbide slag slurrying generated in PVC production processes, filtering are used for titanium dioxide spent acidic by the present invention after washing is qualified
The neutralization of water, while obtained carbide slag filtrate and washing lotion are directly used in phosphate production technique after oxidation processes and used
Water, this method the advantages of be the not only COD caused by eating liquid (predominantly sulfide), the dirt of P and ammonia nitrogen by carbide slag
Dye object is recycled by chemical conversion environmental protection, while purified carbide slag is used for the neutralization of titanium dioxide acid waste water, generates discharge
Water complies fully with drainage requirement of the country to titanium dioxide industry, the discharge of zero total phosphorus, zero COD discharges, zero ammonia nitrogen discharge, with warp
Ji, environmentally friendly double meaning, the invention is more environmentally-friendly to be effectively utilized carbide slag, the processing for having found acid waste water is more economical,
Rationally, environmentally friendly mode, while also paving the way for the recycling again of carbide slag.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is described in further detail.It should be appreciated that described herein, specific examples are only used to explain the present invention, does not limit
In the present invention.
Embodiment 1
(1) 1kg carbide slags are weighed, 10kg fresh waters are added and carry out mashing processing, filters, obtains a calcium carbide blob of slag and filtrate；
(2) a calcium carbide blob of slag is added into water washing, obtains water lotion and carbide slag solid, when tri- kinds of total phosphorus, ammonia nitrogen, COD substances in water lotion
Concentration when being respectively less than 0.1ppm, stop washing；(3) add water slurrying for neutralizing titanium dioxide acid step (2) carbide slag solid
Property waste water, and detect and neutralize the heel row pH that discharges water, total P, ammonia nitrogen, COD；(4) step (1) and (2) filtrate and washing lotion are mixed, is added
Enter 100ml hydrogen peroxide (30%) processing, phosphate production process water is directly used in after being sufficiently stirred.
Embodiment 2
1kg carbide slags are weighed, 10kg fresh waters are added and are beaten, are directly used in titanium dioxide acid waste water
With, and detect and neutralize the pH that heel row discharges water, total P, ammonia nitrogen, COD.
The water Testing index of 1. embodiment 1,2 of table
Claims (7)
1. a kind of carbide slag recoverying and utilizing method, which is characterized in that include the following steps：
(1) it filters：It will be filtered after carbide slag plus water mashing processing, obtain a calcium carbide blob of slag and filtrate；
(2) it washes：A calcium carbide blob of slag is added into water washing, obtains water lotion and carbide slag solid, as total phosphorus, ammonia nitrogen, COD in water lotion
When the concentration of three kinds of substances is respectively less than 0.1ppm, stop washing；
(3) it neutralizes：Add water slurrying for neutralizing titanium dioxide acid waste water step (2) carbide slag solid；
(4) it aoxidizes：Step (1) and (2) filtrate and water lotion are mixed, after oxidizer treatment is added, are directly used in phosphate life
Production. art water.
2. a kind of carbide slag recoverying and utilizing method according to claim 1, which is characterized in that step (1) carbide slag and water
Mass ratio be 1：1~20.
3. a kind of carbide slag recoverying and utilizing method according to claim 1, which is characterized in that the oxidant in step (4)
For hypochlorite, one kind in chlorate or hydrogen peroxide.
4. a kind of carbide slag recoverying and utilizing method according to claim 3, which is characterized in that the hypochlorite is secondary
Sodium chlorate or postassium hypochlorite.
5. a kind of carbide slag recoverying and utilizing method according to claim 3, which is characterized in that the chlorate is chloric acid
Sodium or potassium chlorate.
6. a kind of carbide slag recoverying and utilizing method according to claim 1, which is characterized in that step (3) carbide slag slurrying
For neutralizing the industrial acidic wastewater containing sulfuric acid, hydrochloric acid.
7. a kind of carbide slag recoverying and utilizing method according to claim 1, which is characterized in that in step (4) mixed liquor with
The mass ratio of oxidant is 100：1~20.
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| CN108585281B (en) * | 2018-05-16 | 2021-03-30 | 龙佰四川钛业有限公司 | Method for reducing phosphorus content of discharged wastewater |
| 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 |
| 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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| JPS6384691A (en) * | 1986-09-27 | 1988-04-15 | Aichi Steel Works Ltd | Treatment of waste pickling liquid of steel products |
| CN100424026C (en) * | 2005-06-24 | 2008-10-08 | 王嘉兴 | Method for combined production of gypsum, active carbon, and copperas by using waste sulfuric acid and carbide slag |
| CN1986458A (en) * | 2006-12-12 | 2007-06-27 | 梁永洪 | Carbide residue and waste water treating process |
| CN101759166B (en) * | 2009-12-31 | 2011-06-29 | 四川龙蟒钛业股份有限公司 | Method for pre-treating phosphorite by using acidic waste water in the production process of titanium pigment |
| CN101857325B (en) * | 2010-06-28 | 2011-12-28 | 湘潭大学 | Method for treating iron-containing acidic wastewater |
| CN101921080B (en) * | 2010-08-12 | 2012-08-08 | 山东东佳集团股份有限公司 | Method for utilizing sludge generated by adopting carbide slag or quick lime to process titanium dioxide wastewater |
| CN101962239B (en) * | 2010-09-20 | 2012-01-04 | 湖南永利化工股份有限公司 | Method for purifying titanium white wastewater |
| CN202011796U (en) * | 2010-12-22 | 2011-10-19 | 浙江工商大学 | Acetylene sludge washing dechlorination device |
| CN102328984B (en) * | 2011-08-11 | 2013-08-14 | 四川龙蟒钛业股份有限公司 | Processing method of waste water in phosphorus chemical industry |
| CN103408045B (en) * | 2013-08-01 | 2015-11-18 | 四川龙蟒磷化工有限公司 | A kind of method utilizing phosphorus ore de-magging waste liquid to prepare magnesium hydroxide |
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