CN105271310B - Chlorination-process titanium-white high-salt wastewater comprehensive utilization method - Google Patents
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Abstract
A chlorination-process titanium-white high-salt wastewater comprehensive utilization method comprises the following steps: pre-treating low-concentration sodium hypochlorite wastewater, preparing sodium sulfate wastewater, preparing gypsum and evaporating and crystallizing sodium chloride. The beneficial effects comprise that the method fully utilizes the chlorination-process titanium-white calcium chloride wastewater, low-concentration sodium hypochlorite wastewater and low-sulfate wastewater generated during titanium white washing, and partially utilizes by-product hydrochloric acid and sodium thiosulfate production bottom-flow waste, and is used to produce gypsum and sodium chloride products. The method reuses a large amount of wastewater, does not introduce new water, does not generate effluents, and is low in cost. Generated sodium chloride is reused for molten-salt chlorination, the high-investment low-value problem of titanium-white high-salt wastewater generated in the chlorination process is solved, the economic benefit and the social benefit are extremely substantial, and the method possesses extremely good popularization prospect.
Description
Technical field
The invention belongs to comprehensive utilization of resources field, and in particular to a kind of chloride process titanium dioxide high-salt wastewater comprehensive utilization side
Method.
Background technology
Titanium dioxide is a kind of white inorganic pigment, with optimal opacity, optimal whiteness and brightness and nontoxic etc.
Characteristic, it is the current best Chinese white of performance in the world to be recognized, be widely used in coating, plastics, papermaking, printing-ink,
The industry such as chemical fibre, rubber, cosmetics.TiCl4It is the raw material for producing titanium sponge and titanium dioxide, its production technology mainly has boiling chlorine
Change method and fused salt chlorimation method.Fluidizing chlorination method be using the compound of high titanium slag and petroleum coke in fluidized bed furnace and Cl2Gas is in
Reaction in the state of fluidization generates TiCl4.Fused salt chlorimation method is that titanium slag and petroleum coke are suspended in fused-salt medium, and Cl2Gas
Reaction generates TiCl4。
1tTiCl is often produced using said method4, about output dust-slag collection 200kg, 550～650kg of waste hydrochloric acid, low concentration time
Sodium chlorate waste water 500kg.Contain a large amount of chlorides in these wastes；At present, dust-slag collection, waste hydrochloric acid underflow and milk of lime are neutralized
Slag field is sent to fill after solidification, the high-salt wastewater based on remaining chloride containing calcium is recycled.In production TiCl4During tail gas contain
There is a small amount of chlorine, substantial amounts of low concentration sodium hypochlorite waste water is produced using liquid caustic soda drip washing, the waste water is low containing effective chlorine, with chlorination
Based on sodium and sodium acid carbonate, salinity is high, without good value.
There is certain defect in titanium dioxide, needs are surface-treated as a kind of fine inorganic chemicals pigment.At present,
The more ripe technique of rutile type titanium white inorganic coating mainly has sial coating, zirconium aluminium coating and single aluminium coating.Coating is tried
Agent mainly contains sulfate ion, chlorion etc..Titanium dioxide after coating needs desalination water washing, thus can produce a large amount of
Containing sulfate radicals and chlorion washes, can direct qualified discharge after the mixing of this effluent part.But substantial amounts of water does not have
Recycled, be unfavorable for enterprise clean production, energy-saving and emission-reduction.
The content of the invention
It is to be solved by this invention be in prior art can not low cost make full use of the high calcium salt waste water of chloride process titanium dioxide, height
A kind of technical problem of sodium salt, protosulfate waste water, there is provided chloride process titanium dioxide high-salt wastewater method of comprehensive utilization, the method process
Expense is low, the high calcium salt of chloride process titanium dioxide, high sodium salt, protosulfate waste water can be made full use of, partly using by-product hydrochloric acid and production
The underflow discarded object of hypo.
The present invention solve technical scheme that the technical problem adopted for：
Chloride process titanium dioxide high-salt wastewater method of comprehensive utilization, comprises the following steps：
The pretreatment of a, low concentration sodium hypochlorite waste water
TiCl will be produced4The discarded underflow process 15 of the low concentration sodium hypochlorite waste water of the output hypo of use production in advance～
45min, then react to pH=1～3 with by-product hydrochloric acid, finally adjusted to pH=6～9 with 20% liquid caustic soda, produce saliferous quality hundred
Divide the waste water of content 10～35%；
The preparation of b, sodium sulfate wastewater
The waste water that step a is produced is with the titanium dioxide washes through concentration according to 1:1～1:3 mass ratio is configured to
Sulfur acid sodium weight/mass percentage composition 5～20%, waste water of sodium chloride weight/mass percentage composition 5～20%；
C, gypsum are produced
Gained waste water in step b is added in calcium chloride solution, is fully filtered after reaction, scrubbed drying and processing obtains stone
Cream product；The calcium chloride solution is that the acid waste water that fused salt chlorimation and fluidizing chlorination are produced is neutralized to pH=6～9 with milk of lime
After be obtained, wherein the weight/mass percentage composition of calcium chloride is more than 12%, and the weight/mass percentage composition of sodium chloride is less than 5%；
D, evaporative crystallization sodium chloride
The direct evaporative crystallization sodium chloride of step c gained filtrate is back to into fused salt chlorimation supply salt.
Further, low concentration sodium hypochlorite waste water described in step a is 20% liquid caustic soda drip washing production TiCl4Tail gas produce
It is raw containing Na2SO4Weight/mass percentage composition is not more than 2%, NaHCO3Weight/mass percentage composition is more than 6%, NaClO weight/mass percentage compositions
Waste water of no more than 2%, the NaCl weight/mass percentage compositions more than 5%.
Further, the discarded underflow of hypo described in step a is to produce the waste in hypo product process, wherein
Na2SO4Weight/mass percentage composition be more than 85%, Na2SO3Weight/mass percentage composition is not more than 10%, Na2S2O3Weight/mass percentage composition is not
More than 5%.
Further, the addition of hypo underflow is NaClO in step a：(Na2SO3+1/4Na2S2O3) mol ratio=1:1.
Further, by-product hydrochloric acid described in step a is TiCl4Water wash tail gas is produced in production process, HCl mass percentages
Content is not less than 10%.
Further, by-product hydrochloric acid addition is NaHCO in step a3：HCl mol ratio=1:1.05.
Further, the waste water in step a Jing after liquid caustic soda process contains Na2SO4Weight/mass percentage composition be less than 20%, NaCl
Weight/mass percentage composition is less than 22%.
Further, the titanium dioxide washes in step b through concentration is that titanium dioxide first passes through inorganic agent process
The waste water for producing afterwards, wherein Na2SO4Weight/mass percentage composition less than 2%, NaCl weight/mass percentage compositions be less than 1%, then through film
After process, Na in waste water2SO4Weight/mass percentage composition 6～10%, NaCl weight/mass percentage composition 2～5%；
Further, step a waste water and preparation mass ratio=1 for passing through the titanium dioxide washes for concentrating in step b:2.
Further, the addition of gained waste water is the amount of sodium sulphate material in step b in step c：Chlorination calcium substance
Amount=1.2:1～1:1.
Further, evaporative crystallization described in step d is multiple-effect evaporation mode.
Beneficial effects of the present invention are：Take full advantage of chloride process titanium dioxide calcium chloride wastewater, low concentration sodium hypochlorite waste water,
The protosulfate waste water that titanium dioxide washing is produced, partly using by-product hydrochloric acid, hypo production underflow discarded object, production gypsum, chlorine
Change sodium product, a large amount of waste water of reuse do not introduce new water, with low cost without emission, and the sodium chloride for producing is back to fused salt
Chlorination, solves the problems, such as chloride process titanium dioxide high-salt wastewater high investment low value, and economic benefit and social benefit are very notable, have
Good promotion prospect.
Specific embodiment
Chloride process titanium dioxide high-salt wastewater method of comprehensive utilization, comprises the following steps：
The pretreatment of a, low concentration sodium hypochlorite waste water
Low concentration sodium hypochlorite waste water in advance with production hypo discarded underflow process 15～45min, then with by-product hydrochloric acid
React to pH=1～3, finally adjusted to pH=6～9 with 20% liquid caustic soda, produce the useless of saliferous weight/mass percentage composition 10～35%
Water.The low concentration sodium hypochlorite waste water is 20% liquid caustic soda drip washing production TiCl4Tail gas produce containing Na2SO4Quality percentage contains
Amount is not more than 2%, NaHCO3Weight/mass percentage composition is not more than 2%, NaCl mass percentages more than 6%, NaClO weight/mass percentage compositions
Waste water of the content more than 5%；The discarded underflow of the hypo is to produce the waste in hypo product process, wherein Na2SO4Matter
Amount percentage composition is more than 85%, Na2SO3Weight/mass percentage composition is not more than 10%, Na2S2O3Weight/mass percentage composition is not more than 5%；Institute
It is TiCl to state by-product hydrochloric acid4Water wash tail gas is produced in production process, and HCl weight/mass percentage compositions are not less than 10%；
The discarded underflow addition of the production hypo is NaClO:(Na2SO3+1/4Na2S2O3) mol ratio=1:1.It is secondary
Producing hydrochloric acid addition is：NaHCO3:HCl mol ratio=1:1.05.
This process both can improve the content of sodium sulphate and sodium chloride again using by-product hydrochloric acid and hypo underflow.
Key reaction equation is as follows：
NaClO+Na2SO3=NaCl+Na2SO4
4NaClO+Na2S2O3+2NaHCO3=4NaCl+2Na2SO4+H2O+2CO2↑
HCl+NaHCO3=NaCl+CO2↑+H2O
HCl+NaOH=NaCl+H2O
Weight/mass percentage composition of the waste water containing Na2SO4 Jing after liquid caustic soda process is less than less than 20%, NaCl weight/mass percentage compositions
22%.
The preparation of b, sodium sulfate wastewater
By step a with the titanium dioxide washes through concentration according to 1:1～1:3 mass ratio is configured to sulfur acid sodium 5
～20%, the waste water of sodium chloride 5～20%；Titanium dioxide washes through concentrating is that titanium dioxide is first passed through at inorganic agent
The waste water produced after reason, wherein Na2SO4Weight/mass percentage composition less than 2%, NaCl weight/mass percentage compositions are less than 1%, then pass through
After film process, Na in waste water2SO4Weight/mass percentage composition 6～10%, NaCl weight/mass percentage composition 2～5% (after reducing
Continuous evaporation cost, improves the percent crystallization in massecuite of calcium sulfate, to protosulfate waste water using ripe waste water treatment process through film process
Mode is concentrated, and produces substantial amounts of recycle-water).
C, gypsum are produced
Gained sodium sulfate wastewater in step b is added in calcium chloride solution, the addition of gained waste water is sulfuric acid in step b
The amount of sodium material：Amount=1.2 of chlorination calcium substance:1～1:1；Fully filter after reaction, scrubbed drying and processing obtain gypsum or
Crystal whisker products；The calcium chloride solution is that the acid waste water that fused salt and fluidizing chlorination are produced is neutralized to pH=6～9 with milk of lime,
The weight/mass percentage composition of calcium chloride is more than 12%, and the weight/mass percentage composition of sodium chloride is less than 5%；
Key reaction equation is as follows：
CaCl2+Na2SO4+2H2O=NaCl+CaSO4·2H2O↓
D, evaporative crystallization sodium chloride：The direct evaporative crystallization sodium chloride of step c gained filtrate is back to into fused salt chlorimation supply
Salt.
With reference to embodiment, the invention will be further described, but does not therefore limit the present invention to described reality
Among applying a scope.
Embodiment 1
The present embodiment is raw materials used：
Calcium chloride solution：Calcium chloride weight/mass percentage composition 20.3%；Hypo underflow：Na2SO4Weight/mass percentage composition
85.1%, Na2SO3Weight/mass percentage composition 10%, Na2S2O3Weight/mass percentage composition 5%, it is limited from middle letter Jinzhou metal share
Company.Low concentration sodium hypochlorite waste water：Na2SO4Weight/mass percentage composition 2%, NaHCO3Weight/mass percentage composition 8%, NaClO mass
Percentage composition 2%, NaCl weight/mass percentage compositions 15%.By-product hydrochloric acid HCl weight/mass percentage compositions 20%.Titanium dioxide after concentration is washed
Wash waste water：Na2SO4Weight/mass percentage composition 6%, NaCl weight/mass percentage compositions 4%.20% Ionic Membrane.
1st, the pretreatment of low concentration sodium hypochlorite waste water
1500 grams of low concentration sodium hypochlorite waste waters are taken, 196 grams of hypo underflows are added, after stirring 40min, by-product hydrochloric acid is added
273 grams are neutralized to pH=2.55；It is eventually adding 3.9 grams of 20% liquid caustic soda and is neutralized to pH=7, measures Na2SO4Weight/mass percentage composition
12.4%, NaCl weight/mass percentage composition 11.8%.
2nd, the preparation of sodium sulfate wastewater
1000 grams of protosulfate waste water after concentration is taken, 500 grams of the low concentration sodium hypochlorite waste water after process is configured to contain
Na2SO4Weight/mass percentage composition 8.1%, NaCl weight/mass percentage compositions 6.6%.
3rd, gypsum is produced
By the amount of sodium sulphate material：Amount=1.1 of chlorination calcium substance:1, in the sodium sulfate wastewater of 1500 in step 2 gram
Add 427 grams of the calcium chloride solution that concentration is 20.3%.The completely rear filtration washing of question response, collects filtrate, obtains sulfate dihydrate
270 grams of calcium filter cake, 1658 grams of filtrate, sodium chloride concentration 10.6% in filtrate.
Calcium sulphate dihydrate drying and processing in industry water washing, 160 DEG C of baking ovens obtains 138 grams of product gypsum, wherein sulphur
Sour calcium content 98.6%.
4th, evaporative crystallization sodium chloride：By the direct evaporative crystallization of step 3 gained filtrate, 183 grams of thick sodium chloride, wherein chlorine are obtained
Change sodium content 97.3%.
Embodiment 2
The present embodiment is raw materials used：Calcium chloride solution：Calcium chloride weight/mass percentage composition 13%, sodium chloride weight/mass percentage composition
4%；Hypo underflow：Na2SO4Weight/mass percentage composition 95%, Na2SO3Weight/mass percentage composition 2%, Na2S2O3Weight/mass percentage composition
3%, from CITIC Jinzhou Metal Co., Ltd..Low concentration sodium hypochlorite waste water：Na2SO4Weight/mass percentage composition 0.5%,
NaHCO3Weight/mass percentage composition 10%, NaClO weight/mass percentage compositions 0.5%, NaCl weight/mass percentage compositions 10.5%.By-product hydrochloric acid
HCl weight/mass percentage compositions 10%.Protosulfate waste water after concentration：Na2SO4Weight/mass percentage composition 10%, NaCl mass percentages
Content 2%.20% Ionic Membrane.
1st, the pretreatment of low concentration sodium hypochlorite waste water
2000 grams of low concentration sodium hypochlorite waste waters are taken, 147 grams of hypo underflows are added, after stirring 15min, by-product hydrochloric acid is added
912.5 gram it is neutralized to pH=1.39；It is eventually adding 6.9 grams of 20% liquid caustic soda and is neutralized to pH=7.6, measures Na2SO4Quality percentage contains
5.4%, NaCl of amount weight/mass percentage compositions 12.4%.
2nd, the preparation of sodium sulfate wastewater
Middle 1000 grams of the low concentration sodium hypochlorite waste water for having pre-processed in step 1 is taken, with the protosulfate waste water after concentration
1000 grams of mixing, are configured to containing Na2SO4Weight/mass percentage composition 10.3%, the waste water of NaCl weight/mass percentage compositions 9.6%.
3rd, gypsum is produced
By the amount of sodium sulphate material：Amount=1.2 of chlorination calcium substance:1, in the sodium sulfate wastewater of 2000 in step 2 gram
Add 1032 grams of the calcium chloride solution that concentration is 13%.The completely rear filtration washing of question response, collects filtrate, obtains calcium sulphate dihydrate
415 grams of filter cake, 2116 grams of filtrate, the sodium chloride concentration 14.3% of filtrate.
Calcium sulphate dihydrate obtains 210 grams of product gypsum through industry water washing, 160 DEG C of drying and processings, and wherein calcium sulfate contains
Amount 97.5%.
4th, evaporative crystallization sodium chloride
By the direct evaporative crystallization of step 1 gained filtrate, 385 grams of thick sodium chloride, wherein sodium chloride content 97.8% are obtained.
Embodiment 3
Calcium chloride solution：Calcium chloride weight/mass percentage composition 30%；Hypo underflow：Na2SO4Weight/mass percentage composition 91.5%,
Na2SO3Weight/mass percentage composition 7%, Na2S2O3Weight/mass percentage composition 1.5%, from CITIC Jinzhou Metal Co., Ltd..
Low concentration sodium hypochlorite waste water：Na2SO4Weight/mass percentage composition 1.5%, NaHCO3Weight/mass percentage composition 7%, NaClO mass percentages
Content 1.0%, NaCl weight/mass percentage compositions 15%.By-product hydrochloric acid HCl weight/mass percentage compositions 15%.Titanium dioxide washing after concentration
Waste water：Na2SO4Weight/mass percentage composition 8%, NaCl weight/mass percentage compositions 3%.20% Ionic Membrane.
1st, the pretreatment of low concentration sodium hypochlorite waste water
1500 grams of low concentration sodium hypochlorite waste waters are taken, 196 grams of hypo underflows are added, after stirring 30min, by-product hydrochloric acid is added
213 grams are neutralized to pH=2.04；It is eventually adding 2.3 grams of 20% liquid caustic soda and is neutralized to pH=6.5, measures Na2SO4Weight/mass percentage composition
17.8%, NaCl weight/mass percentage composition 14.9%.
2nd, the preparation of sodium sulfate wastewater
1200 grams of protosulfate waste water after concentration is taken, 400 grams of the low concentration sodium hypochlorite waste water after process is configured to contain
Na2SO4Weight/mass percentage composition 10.5%, NaCl weight/mass percentage compositions 6.0%.
3rd, gypsum is produced
By the amount of sodium sulphate material：Amount=1 of chlorination calcium substance:1, add in the sodium sulfate wastewater of 1600 in step 2 gram
Enter 580 grams of the calcium chloride solution that concentration is 30%.The completely rear filtration washing of question response, collects filtrate, obtains calcium sulphate dihydrate filter
539 grams of cake, 2040 grams of filtrate, sodium chloride concentration 21.6% in filtrate.
Calcium sulphate dihydrate drying and processing in industry water washing, 160 DEG C of baking ovens obtains 273 grams of product gypsum, wherein sulphur
Sour calcium content 96.9%.
4th, evaporative crystallization sodium chloride
By the direct evaporative crystallization of step 3 gained filtrate, 360 grams of thick sodium chloride, wherein sodium chloride content 98.5% are obtained.
Also do not occur a kind of method for being capable of low cost comprehensive utilization chloride process titanium dioxide high-salt wastewater in prior art,
A large amount of waste water commission environmental protection processed in units, spend substantial contribution, there is certain risk, and resource is not also recycled.By reality
Apply example to understand：The inventive method solves this problem, and this method makes full use of chloride process titanium dioxide high-salt wastewater, byproduct sulfuric acid
Sodium, it is with low cost, the expense of chloride process titanium dioxide high-salt wastewater that processes not only can be saved, and various chemical industry can be produced and be produced
Product：Gypsum, sodium chloride etc., the sodium chloride and distilled water of production can be returned and used, it can be seen that the inventive method economic benefit
It is very notable.Chloride process titanium dioxide high-salt wastewater calcium chloride solution, by adding low concentration sodium hypochlorite waste water, other change this method
Work discarded object sodium sulphate, production gypsum (purity is more than 96%) and sodium chloride, it is pollution-free without discharge, efficiently solve chloridising
The environmental problem of titanium white high-salt wastewater, that is, solve an inexpensive skill for perplexing chloridising production titanium dioxide industry for a long time
An art difficult problem, social benefit is notable, with good promotional value.
The specific embodiment of the present invention is these are only, the present invention is not limited to, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (8)
1. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization, is characterized in that：Comprise the following steps：
The pretreatment of a, low concentration sodium hypochlorite waste water
TiCl will be produced4The low concentration sodium hypochlorite waste water of output processes 15～45min with the discarded underflow of production hypo in advance,
React with by-product hydrochloric acid again to pH=1～3, finally adjusted to pH=6～9 with 20% liquid caustic soda, produce saliferous weight/mass percentage composition
10～35% waste water；
The preparation of b, sodium sulfate wastewater
The waste water that step a is produced is with the titanium dioxide washes through concentration according to 1:1～1:3 mass ratio is configured to sulfur-bearing
Sour sodium weight/mass percentage composition 5～20%, the waste water of sodium chloride weight/mass percentage composition 5～20%；
C, gypsum are produced
Gained waste water in step b is added in calcium chloride solution, is fully filtered after reaction, scrubbed drying and processing obtains gypsum product
Product；The calcium chloride solution is that the acid waste water that fused salt chlorimation and fluidizing chlorination are produced is neutralized to system behind pH=6～9 with milk of lime
, wherein the weight/mass percentage composition of calcium chloride is more than 12%, and the weight/mass percentage composition of sodium chloride is less than 5%；
D, evaporative crystallization sodium chloride
The direct evaporative crystallization sodium chloride of step c gained filtrate is back to into fused salt chlorimation supply salt；
Low concentration sodium hypochlorite waste water described in step a is 20% liquid caustic soda drip washing production TiCl4Tail gas produce containing Na2SO4Matter
Amount percentage composition is not more than 2%, NaHCO3Weight/mass percentage composition is not more than 2%, NaCl more than 6%, NaClO weight/mass percentage compositions
Waste water of the weight/mass percentage composition more than 5%；
The discarded underflow of hypo described in step a is to produce the waste in hypo product process, wherein Na2SO4Quality percentage contain
Amount is more than 85%, Na2SO3Weight/mass percentage composition is not more than 10%, Na2S2O3Weight/mass percentage composition is not more than 5%.
2. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：It is secondary described in step a
It is TiCl to produce hydrochloric acid4Water wash tail gas is produced in production process, and HCl weight/mass percentage compositions are not less than 10%.
3. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：By-product in step a
Hydrochloric acid addition is NaHCO3：HCl mol ratio=1:1.05.
4. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：Jing liquid in step a
Waste water after alkali process contains Na2SO4Weight/mass percentage composition less than 20%, NaCl weight/mass percentage compositions be less than 22%.
5. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：Pass through in step b
The titanium dioxide washes of concentration is that titanium dioxide first passes through the waste water produced after inorganic agent is processed, wherein Na2SO4Quality
Percentage composition is less than 1% less than 2%, NaCl weight/mass percentage compositions, then after film process, Na in waste water2SO4Quality percentage
It is 2～5% that content is the weight/mass percentage composition of 6～10%, NaCl.
6. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：Waste water in step b
With preparation mass ratio=1 of the titanium dioxide washes through concentration:2.
7. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：Gained in step c
The addition of waste water is the amount of sodium sulphate material：Amount=1.2 of chlorination calcium substance:1～1:1.
8. chloride process titanium dioxide high-salt wastewater method of comprehensive utilization according to claim 1, is characterized in that：Described in step d
Evaporative crystallization is multiple-effect evaporation mode.
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| CN106629832B (en) * | 2016-10-25 | 2018-03-20 | 锦州钛业股份有限公司 | The minimizing technology of low melting point complex in fused salt chlorimation production titanium tetrachloride eluting column |
| CN108675499A (en) * | 2018-05-30 | 2018-10-19 | 龙蟒佰利联集团股份有限公司 | A kind of method of chloride slag mashing waste water integrated treatment |
| CN110981056B (en) * | 2019-12-05 | 2020-10-23 | 济南裕兴化工有限责任公司 | Treatment method of sulfuric acid process titanium dioxide washing wastewater |
| CN110963729A (en) * | 2020-01-03 | 2020-04-07 | 龙蟒佰利联集团股份有限公司 | Method for preparing titanium dioxide byproduct gypsum and reducing standard thickening water consumption |
| CN112028368B (en) * | 2020-09-16 | 2024-01-23 | 广东益诺欧环保股份有限公司 | System and method for treating waste hydrochloric acid and waste brine in production of titanium dioxide chloride |
| CN114775059B (en) * | 2022-06-20 | 2022-09-06 | 国能龙源环保有限公司 | System and method for preparing gypsum whiskers by comprehensively utilizing strong salt wastewater and gypsum whiskers |
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