CN107128890A - Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging - Google Patents
Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging Download PDFInfo
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- CN107128890A CN107128890A CN201710469591.0A CN201710469591A CN107128890A CN 107128890 A CN107128890 A CN 107128890A CN 201710469591 A CN201710469591 A CN 201710469591A CN 107128890 A CN107128890 A CN 107128890A
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- magging
- titanium white
- phosphorus ore
- white waste
- waste acid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
Abstract
The present invention relates to a kind of production method of calcium monohydrogen phosphate, specifically disclosing a kind of titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging, comprises the following steps：A, with titanium white waste acid to phosphorus ore de-magging；B, to de-magging slurry separation of solid and liquid；C, neutralization de-magging mother liquor；D, to after neutralization slurry carry out separation of solid and liquid, cool down filtrate；E, to after cooling filtrate carry out clarifying treatment, used clear liquid as the process recycled water that calcium monohydrogen phosphate is produced.It is an advantage of the invention that：1) the de-magging cost and phosphorus for substantially reducing high-magnesium-phosphorus ore are damaged, while the recycling for a large amount of titanium white waste acids have found outlet；2) a kind of closed loop process for the de-magging mother liquor containing a large amount of impurity for carrying out de-magging generation to phosphorus ore with titanium white waste acid is provided, the problem for hindering this method industrially to promote is overcome；3) combination of sulfuric acid method titanium pigment production technology and calcium monohydrogen phosphate production technology is realized.
Description
Technical field
The present invention relates to a kind of production method of calcium monohydrogen phosphate, phosphorus ore is pre- in especially a kind of calcium monohydrogen phosphate production process
Processing method.
Background technology
The production technology of usual calcium hydrophosphate fodder is：Using high-grade low magnesium phosphorus ore and direct reaction of sulfuric acid, obtain
To phosphoric acid by wet process, after metering into one section of neutralization chamber, neutralized with milk of lime, filtering filter residue is used for the cheap fertilizer of production prices
Calcium monohydrogen phosphate (white fertilizer), the iron after being neutralized by one section in phosphoric acid, aluminium, the impurity such as sulfate radical is purified；Filtrate enters two sections
Neutralization chamber, with milk of lime continue neutralize, filter liquor return preparing lime milk, filter cake through pneumatic conveying drying, be crushed into product.Its
Exemplary steps can be summarized as follows：
(1) phosphoric acid by wet process is obtained by low magnesium phosphorus ore and sulfuric acid reaction；
(2) in one section of neutralization chamber, phosphoric acid by wet process carries out neutralization reaction with milk of lime, obtains reaction slurry；
(3) filtering reaction slurry obtains one section of filtrate and filter residue；Filter residue is used to produce white fertilizer；
(4) in two sections of neutralization chambers, one section of filtrate carries out neutralization reaction with milk of lime, obtains slurry；
(5) filter slurry obtains two sections of filtrates and filter cake, filter cake through pneumatic conveying drying, be crushed into calcium hydrophosphate fodder and produce
Product.
In the production process of calcium monohydrogen phosphate, because magnesium can not be removed in one section of neutralization, therefore product is fully entered, influenceed
Product purity, in order to obtain the calcium hydrophosphate fodder product of high-quality, generally using high-grade phosphorus ore, low content of magnesium, generally
It is required that content of magnesium is less than 0.5% (mass fraction).
For many years, as society improves constantly to the demand of phosphor resource, minable high-grade phosphate rock resource is increasingly
Few, phosphorus ore grade declines, and higher impurity content is the problem of we necessarily face.Current part producer is using sulfuric acid to high magnesium phosphorus
Ore deposit carries out pretreatment and removes magnesium, then prepares phosphoric acid by wet process using de-magging phosphorus ore, and then prepare calcium hydrophosphate fodder, the work
Skill efficiently solves the technical problem that high-magnesium-phosphorus ore produces calcium hydrophosphate fodder.But it is due to that sulfuric acid is strong acid, it is impossible to avoid
With phosphorus ore antedating response, phosphorus is caused to damage, while being difficult to handle containing substantial amounts of pollutant in de-magging mother liquor, sulfuric acid consumption is higher to be caused
Cost is higher, is difficult to promote in actual production.
A kind of high-magnesium-phosphorus ore de-magging by-product is for example disclosed in Publication No. CN102992284A Chinese patent document
The method of ammonium magnesium phosphate, the patent is that de-magging is carried out to high-magnesium-phosphorus ore using sulfuric acid or phosphoric acid, but is existed with sulfuric acid de-magging
Above-mentioned defect, and phosphoric acid price is high, the industrially possibility without implementation.
In sulfuric acid process titanium valve in vain production, it is 20~25% or so often to produce 1t titanium dioxides and about produce sulfur acid mass fraction
Spent acid 6t or so, the spent acid is titanium white waste acid, and the improvement of titanium white waste acid is one that solves titanium white production environmental pollution
Important process.
The content of the invention
It is used to produce calcium hydrophosphate fodder to develop high-magnesium-phosphorus ore resource, while titanium white waste acid is reclaimed,
The invention provides the closed circulation process that a kind of titanium white waste acid is used for phosphorus ore de-magging.
The technical solution adopted in the present invention is：Titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging, including following
Step：
A, to after precrushing phosphorus ore carry out wet-milling after, add thereto metering titanium white waste acid carry out de-magnesium reaction, obtain
To de-magging slurry；
B, to de-magging slurry carry out separation of solid and liquid, obtain de-magging phosphorus ore filter cake and de-magging mother liquor；
C, into de-magging mother liquor add neutralization reagent neutralized, slurry after being neutralized；
D, to after neutralization slurry carry out separation of solid and liquid obtain filter cake and filtrate, filtrate filtrate after being cooled down；
E, to after cooling filtrate carry out clarifying treatment after obtain clear liquid, the process cycles that clear liquid is produced as calcium monohydrogen phosphate
Water is used, and realizes closed circulation.
In the present invention, inventor proposes that de-magging processing, titanium white waste acid sheet can be carried out to high-magnesium-phosphorus ore using titanium white waste acid
Body is a kind of byproduct wastewater, uses it for phosphorus ore de-magging and not only greatly reduces feed grade relative to using sulfuric acid or phosphoric acid de-magging
The production cost of calcium monohydrogen phosphate, moreover it is possible to reduce the phosphorus that sulfuric acid de-magging brings and damage, and to be big in sulfuric acid method titanium pigment production process
The processing of amount titanium white waste acid have found outlet.Experiment proves to may be such that magnesium in phosphorus ore after carrying out de-magging to phosphorus ore using titanium white waste acid
Content reduction by 70~95%, phosphorus loss late is only within 0.2~3%.
But inventor has found in research and production, due to containing a large amount of impurity in titanium white waste acid, locate in advance for phosphorus ore
Managing during de-magging may be due to misoperation, and equipment fault lamp reason causes the index such as phosphorus, fluorine in the de-magging mother liquor that produces
Exceeded, the filtrate of generation is also difficult to remove fluorine therein, phosphorus etc. completely even if using calcium hydroxide progress sewage disposal.Moreover state
Family is all water totally enclosed circulations for the environmental requirement of phosphorus product Chemical Manufacture enterprise, must not there is production, process water row
Put.This defect undoubtedly causes serious obstruction to the popularization of the technique.
Inventor has found that the main component of the de-magging mother liquor produced during titanium white waste acid pre-treating phosphorite is under study for action
Sulfuric acid, ferrous sulfate, magnesium sulfate and micro other impurities.Inventor's proposition can carry out neutralisation treatment to it, pass through neutralisation treatment
Wherein most impurity formation precipitation is may be such that, can be removed, almost be comprised only in obtained filtrate by separation of solid and liquid
A small amount of dissolving calcium sulfate and iron ion.The present invention is separated into one using will pass through clarifying treatment after the cooling of the filtrate after neutralization again
Step purification, obtained clear liquid the experiment proved that the process recycled water that can be produced as calcium monohydrogen phosphate is used, will not be to product quality
Produce any influence.And any draining will not be produced in calcium monohydrogen phosphate production, realize closed circulation.
Heretofore described " process recycled water of calcium monohydrogen phosphate production " refers to each life in calcium monohydrogen phosphate production process
The recirculated water that uses of production link, for example, grind mining water, vacuum pump circulating water, phosphoric acid dilution water, turntable wash water, calcification buck,
Phosphorus ammonium tail gas shower water, extraction tank tail gas shower water etc..Above-mentioned clear liquid can be recycled in these links, will not be produced and be appointed
What draining.
Because part moisture is consumed and (mainly eats liquid by filter cake and moisture evaporation causes) in technique, terminate in each circulation
After need to carry out system moisturizing in moisturizing, the present invention can be by adding new titanium white waste acid and concentration by adjusting titanium white waste acid
Realized with addition, without additionally supplementing new process water.
The de-magging phosphorus ore filter cake that is obtained in step B of the present invention is that is, low magnesium phosphorus ore in traditional handicraft, can directly be pressed
It is used to produce according to the typical production process of calcium hydrophosphate fodder.Clarifying treatment method described in step E can use common
Standing clarification or centrifugal clarification processing etc. method.
As a further improvement on the present invention, it will be given up in filtrate return to step A after the cooling in a part of step D with titanium white
Acid is mixed for phosphorus ore de-magging.Under normal circumstances, we can be by controlling the concentration and addition of titanium white waste acid come to we
The water circulation of case is maintained, therefore filtrate is usually that can be completely used for the consumption of process recycled water after step D cooling.
But the remaining situation of filtrate after some situation acid-spending strengths are relatively low and may cool down during larger addition, now can be by one
Filtrate, which is used to produce, after part is cooled down is used as process recycled water after clear liquid, and filtrate then direct return to step after another part cooling
With being used further to phosphorus ore de-magging after titanium white waste acid mixed diluting in A, so as to avoid arranging outside unnecessary process water.
As a further improvement on the present invention, the titanium white waste acid in step A is diluted to h 2 so 4 concentration be 3~
5%.H 2 so 4 concentration is 20~25% in titanium white waste acid, and this is still that a higher sulfuric acid is dense for phosphorus ore de-magging
Degree, phosphorus ore may cause phosphorus to damage with titanium white waste acid antedating response.Experiment is proved can be big by the way that sulfuric acid concentration is diluted into 3~5%
Big reduction phosphorus damages (caning be controlled in 0.2~0.3%), meanwhile, the concentration and addition of titanium white waste acid can also be entered by dilution
Row control, so as to control the yield of final clear liquid, and then plays a part of maintaining whole process water balance.It is readily appreciated that,
Titanium white waste acid can be diluted with fresh water, in the case that filtrate is excessive after the cooling period, it is possible to use filtrate is come after above-mentioned cooling
Dilution.
As a further improvement on the present invention, the reaction temperature of step A de-magnesium reactions is 40~60 DEG C, and the reaction time is 30
~90 minutes.It is demonstrated experimentally that maintaining the reaction time of 30~90 minutes under 40~60 DEG C of reaction temperature, de-magnesium reaction can be made
What is carried out is more abundant.
As a further improvement on the present invention, obtained by step A in de-magging slurry liquid phase pH=2.0~4.5, to maintain one
Fixed de-magging efficiency.
As a further improvement on the present invention, the neutralization reagent described in step C is milk of lime or carbide slag slurries.The electricity
Rock ballast slurry refer to acetylene method production polyvinyl chloride technique in, calcium carbide hydrolysis obtain acetylene when produce containing the thick of calcium hydroxide
Slurry, contains hydrogen phosphide in this accessory substance, sulfide, the objectionable impurities such as ammonia nitrogen, it is difficult to handle, inventor proposes to can be used for this hair
The neutralization of bright middle de-magging mother liquor, precipitation can be collectively forming with corresponding impurity component in de-magging mother liquor and is removed, two kinds are realized
The combination of by-product devil liquor recovery processing, with economic and environment-friendly double benefit.
As a further improvement on the present invention, the temperature of filtrate is below 40 DEG C after being cooled down in step D, because follow-up clear liquid is made
Temperature is needed to be less than 40 DEG C for component cooling water, while filtrate is beneficial to as requiring that temperature is less than 40 DEG C during system water supplement after cooling
Reaction controlling.
The beneficial effects of the invention are as follows：1) de-magging is carried out to high-magnesium-phosphorus ore using titanium white waste acid, substantially reduces high-magnesium-phosphorus ore
De-magging cost and phosphorus damage, while the recycling for a large amount of titanium white waste acids have found outlet；2) provide a kind of useless with titanium white
Acid carries out the closed loop process of the de-magging mother liquor containing a large amount of impurity of de-magging generation to phosphorus ore, overcomes obstruction this method in production
The problem promoted in industry；3) combination of sulfuric acid method titanium pigment production technology and calcium monohydrogen phosphate production technology, two kinds are realized
The accessory substance that technique is produced is mutually using simultaneously closed circulation, with very high economical and environmentally friendly value.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
With reference to embodiment, the present invention is further described.
Embodiment one：
Titanium white waste acid is used for phosphorus ore de-magging in accordance with the following methods：
1st, high-magnesium-phosphorus ore (P is taken2O5=28%, MgO=5.0%) 1kg, 1kg fresh waters are added after crushing and are carried out with ball mill
Wet-milling to 100 mesh sieve percent of pass be 96%, by obtained ore pulp inject pretreatment tank and be warming up to 50 DEG C it is standby；
2nd, by titanium white waste acid (H2SO4=20%, FeSO4=h 2 so 4 concentration 11%) is diluted to for 3.0%, Ran Houxiang
The titanium white waste acid 2.8L added in pretreatment tank after dilution, is stirred while adding, and de-magnesium reaction 90min is carried out under the conditions of 50 DEG C
After obtain de-magging slurry (pH=3.5)；
3rd, de-magging slurry is filtered, obtains de-magging phosphorus ore filter cake and de-magging mother liquor, detection phosphorus ore demagnesium rate and phosphorus are damaged
(the results are shown in Table 1), subsequent technique production calcium hydrophosphate fodder is sent to by de-magging phosphorus ore filter cake；
4th, while stirring toward milk of lime is added in de-magging mother liquor, the addition of control milk of lime makes slurry pH=7.0 (waste water
In ferrous impurity fully precipitate, neutralize after pH=6.0~10.0), curing 40min, slurry after neutralization be filtrated to get
Filter cake and filtrate, filtrate through water tower be cooled to 38 DEG C cooled down after filtrate, take part cool down after filtrate it is dilute as titanium white waste acid
Release and used with water；
5th, supernatant liquor 0.5L is obtained after filtrate after remaining cooling being stood into clarification 30min, the clear liquid is regard as feed
The process recycled water of calcium hydrophosphate production is used.
Embodiment two：
Titanium white waste acid is used for phosphorus ore de-magging in accordance with the following methods：
1st, high-magnesium-phosphorus ore (P is taken2O5=28%, MgO=5.0%) 1kg, step 5 institute in 1kg embodiments one is added after crushing
Clear liquid is obtained, it is 95% that wet-milling to 100 mesh sieve percent of pass are carried out with ball mill, obtained ore pulp is injected into pretreatment tank and is warming up to
60 DEG C standby；
2nd, to titanium white waste acid (H2SO4=20%, FeSO4=11%) in add cooled down in embodiment one obtained by step 4 after filter
Liquid, it is 4.8% that titanium white waste acid is diluted into h 2 so 4 concentration, the titanium white waste acid then added into pretreatment tank after dilution
2.3L, is stirred while adding, and de-magging slurry (pH=3.9) is obtained after carrying out de-magnesium reaction 30min under the conditions of 60 DEG C；
3rd, de-magging slurry is filtered, obtains de-magging phosphorus ore filter cake and de-magging mother liquor, detection phosphorus ore demagnesium rate and phosphorus are damaged
(the results are shown in Table 1), subsequent technique production calcium hydrophosphate fodder is sent to by de-magging phosphorus ore filter cake；
4th, while stirring toward carbide slag slurries are added in de-magging mother liquor, the addition of control carbide slag slurries makes slurry pH=8.0,
Cure after 40min, slurry after neutralization carried out to be filtrated to get filter cake and filtrate, filtrate through water tower be cooled to 30 DEG C obtain cooling after
Filtrate；
5th, supernatant liquor 0.3L is obtained after filtrate after cooling being stood into clarification 30min, the clear liquid is regard as feed grade phosphoric acid
The process recycled water of hydrogen calcium production is used.
Table 1：Phosphorus ore demagnesium rate and phosphorus damage situation detection table
| Project | Phosphorus ore demagnesium rate | Phosphorus is damaged |
| Embodiment one | 70% | 0.30% |
| Embodiment two | 71% | 0.22% |
Claims (7)
1. titanium white waste acid is used for the closed circulation process of phosphorus ore de-magging, comprise the following steps：
A, to after precrushing phosphorus ore carry out wet-milling after, add thereto metering titanium white waste acid carry out de-magnesium reaction, taken off
Magnesium slurry；
B, to de-magging slurry carry out separation of solid and liquid, obtain de-magging phosphorus ore filter cake and de-magging mother liquor；
C, into de-magging mother liquor add neutralization reagent neutralized, slurry after being neutralized；
D, to after neutralization slurry carry out separation of solid and liquid obtain filter cake and filtrate, filtrate filtrate after being cooled down；
E, to after cooling filtrate carry out clarifying treatment after obtain clear liquid, enter clear liquid as the process recycled water that calcium monohydrogen phosphate is produced
Exercise and use, realize closed circulation.
2. titanium white waste acid according to claim 1 is used for the closed circulation process of phosphorus ore de-magging, it is characterised in that：By one
It is mixed for phosphorus ore de-magging with titanium white waste acid in filtrate return to step A after the cooling in D step by step.
3. titanium white waste acid according to claim 1 is used for the closed circulation process of phosphorus ore de-magging, it is characterised in that：To step
It is 3~5% that titanium white waste acid in A, which is diluted to h 2 so 4 concentration,.
4. the titanium white waste acid according to any claim in claims 1 to 3 is used for the closed circulation process of phosphorus ore de-magging,
It is characterized in that：The reaction temperature of step A de-magnesium reactions is 40~60 DEG C, and the reaction time is 30~90 minutes.
5. the titanium white waste acid according to any claim in claims 1 to 3 is used for the closed circulation process of phosphorus ore de-magging,
It is characterized in that：PH=2.0~4.5 of liquid phase in de-magging slurry obtained by step A.
6. the titanium white waste acid according to any claim in claims 1 to 3 is used for the closed circulation process of phosphorus ore de-magging,
It is characterized in that：Neutralization reagent described in step C is milk of lime or carbide slag slurries.
7. the titanium white waste acid according to any claim in claims 1 to 3 is used for the closed circulation process of phosphorus ore de-magging,
It is characterized in that：The temperature of filtrate is below 40 DEG C after being cooled down in step D.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504444A (en) * | 2022-09-30 | 2022-12-23 | 昆明川金诺化工股份有限公司 | Method for treating phosphorite chemical magnesium removal liquid |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924046A (en) * | 2006-08-25 | 2007-03-07 | 四川大学 | Method of retrieving magnesium from high magnesium phosphorus ore |
| CN101058414A (en) * | 2007-06-06 | 2007-10-24 | 四川绵竹新清华化工有限责任公司 | Reused process for waste water in calcium hydrogen orthophosphate production |
| CN101759166A (en) * | 2009-12-31 | 2010-06-30 | 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 |
| CN102115819A (en) * | 2011-01-27 | 2011-07-06 | 中化重庆涪陵化工有限公司 | Method for recycling magnesium from middle-low grade high-magnesium phosphate rock |
| CN102674277A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒钛业股份有限公司 | Method for pre-treating phosphorus rock by mixture of titanium dioxide waste acid and fluorine-containing waste water |
| CN102674278A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒钛业股份有限公司 | Method for pre-treating phosphorus rock by titanium dioxide waste acid |
| CN102674286A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒磷化工有限公司 | Method for preparing high-quality feed-grade calcium hydrophosphate by by-product waste acid of titanium dioxide |
| CN103073034B (en) * | 2013-01-17 | 2014-09-10 | 贵州开磷（集团）有限责任公司 | Method for removing magnesium from ultralow-quality phosphate rock and producing magnesium hydroxide |
| CN104445120A (en) * | 2014-11-04 | 2015-03-25 | 湖北祥云(集团)化工股份有限公司 | Co-production method and system of ammonium phosphate and magnesium hydrate |
| CN105884077A (en) * | 2016-04-13 | 2016-08-24 | 四川绵竹市盘龙矿物质有限责任公司 | Method for realizing total-closed wastewater circulation in feed-grade calcium hydrophosphate production process |
-
2017
- 2017-06-20 CN CN201710469591.0A patent/CN107128890B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924046A (en) * | 2006-08-25 | 2007-03-07 | 四川大学 | Method of retrieving magnesium from high magnesium phosphorus ore |
| CN101058414A (en) * | 2007-06-06 | 2007-10-24 | 四川绵竹新清华化工有限责任公司 | Reused process for waste water in calcium hydrogen orthophosphate production |
| CN101759166A (en) * | 2009-12-31 | 2010-06-30 | 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 |
| CN102115819A (en) * | 2011-01-27 | 2011-07-06 | 中化重庆涪陵化工有限公司 | Method for recycling magnesium from middle-low grade high-magnesium phosphate rock |
| CN102674277A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒钛业股份有限公司 | Method for pre-treating phosphorus rock by mixture of titanium dioxide waste acid and fluorine-containing waste water |
| CN102674278A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒钛业股份有限公司 | Method for pre-treating phosphorus rock by titanium dioxide waste acid |
| CN102674286A (en) * | 2012-05-25 | 2012-09-19 | 四川龙蟒磷化工有限公司 | Method for preparing high-quality feed-grade calcium hydrophosphate by by-product waste acid of titanium dioxide |
| CN103073034B (en) * | 2013-01-17 | 2014-09-10 | 贵州开磷（集团）有限责任公司 | Method for removing magnesium from ultralow-quality phosphate rock and producing magnesium hydroxide |
| CN104445120A (en) * | 2014-11-04 | 2015-03-25 | 湖北祥云(集团)化工股份有限公司 | Co-production method and system of ammonium phosphate and magnesium hydrate |
| CN105884077A (en) * | 2016-04-13 | 2016-08-24 | 四川绵竹市盘龙矿物质有限责任公司 | Method for realizing total-closed wastewater circulation in feed-grade calcium hydrophosphate production process |
Non-Patent Citations (1)
| Title |
|---|
| 王励生 主编: "《中国化学会第四届全国应用化学学术会议论文集》", 31 May 1994, 成都科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504444A (en) * | 2022-09-30 | 2022-12-23 | 昆明川金诺化工股份有限公司 | Method for treating phosphorite chemical magnesium removal liquid |
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