CN107021466A - Sulfuric acid method titanium pigment acid waste water is used for the closed circulation process that phosphorus ore is pre-processed - Google Patents
Sulfuric acid method titanium pigment acid waste water is used for the closed circulation process that phosphorus ore is pre-processed Download PDFInfo
- Publication number
- CN107021466A CN107021466A CN201710272496.1A CN201710272496A CN107021466A CN 107021466 A CN107021466 A CN 107021466A CN 201710272496 A CN201710272496 A CN 201710272496A CN 107021466 A CN107021466 A CN 107021466A
- Authority
- CN
- China
- Prior art keywords
- phosphorus ore
- waste water
- magging
- acid waste
- sulfuric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fertilizers (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of production method of calcium hydrophosphate fodder, specifically disclosing a kind of sulfuric acid method titanium pigment acid waste water is used for the closed circulation process that phosphorus ore is pre-processed, and comprises the following steps：A, addition acid waste water are to phosphorus ore de-magging；B, to de-magging slurry carry out separation of solid and liquid；C, neutralization de-magging mother liquor；D, to after neutralization slurry carry out separation of solid and liquid；It is used to wash thick metatitanic acid slurry after filtrate clarification；E, to being recycled in return to step A after acid waste water moisturizing.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 acid waste waters have found outlet；2) provide due to the 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 acid waste water, overcome the problem for hindering this method industrially to promote；3) combination of sulfuric acid method titanium pigment production technology and calcium hydrophosphate fodder production technology is realized.
Description
Technical field
The present invention relates to a kind of production method of calcium hydrophosphate fodder, especially a kind of calcium hydrophosphate fodder was produced
The preprocess method of phosphorus ore in journey.
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 fewer and fewer,
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
Carry out pretreatment and remove magnesium, phosphoric acid by wet process is then prepared using de-magging phosphorus ore, and then prepare calcium hydrophosphate fodder, the technique
Efficiently solve the technical problem that high-magnesium-phosphorus ore produces calcium hydrophosphate fodder.But be due to that sulfuric acid is strong acid, it is impossible to avoid with
Phosphorus ore antedating response, causes phosphorus 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 into
This 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.
Typical sulfuric acid method titanium pigment production technology is as follows：
(1) acidolysis reaction is carried out with sulfuric acid with ilmenite concentrate or acid-dissolved titanium slag, obtains titanyl sulfate solution；
(2) hydrolysing titanyl sulfate solution obtains thick metatitanic acid slurry；
(3) thick metatitanic acid slurry is washed, salt treatment, obtain pretreatment metatitanic acid；
(4) pretreatment metatitanic acid feeding rotary kiln calcining output TiO2Product.
Wherein, it is specially to the technique that thick metatitanic acid slurry is washed：
(1) once wash：Separation of solid and liquid is carried out to thick metatitanic acid slurry, a filter cake is obtained；Water-filling is entered to a filter cake
Wash to remove wherein iron ion, obtain one and wash metatitanic acid cake；One, which washes metatitanic acid cake, adds water mashing, obtains one and washes metatitanic acid slurry；
(2) bleaching reduction：Addition bleaching agent and reducing agent in metatitanic acid slurry are washed toward one to be bleached, and it is brilliant to add calcining
Kind, obtain bleaching slurry；
(3) secondary washing：Separation of solid and liquid is carried out to bleaching slurry, secondary filter cake is obtained；Secondary filter cake is washed with
Wherein iron ion is further removed, two is obtained and washes metatitanic acid cake；Two, which wash metatitanic acid cake, adds water mashing, obtains two and washes metatitanic acid slurry
Material.
In sulfate process titanium dioxide production, often produce 1t titanium dioxides and about produce the waste water that sulfur acid mass fraction is 2.5% or so
40t or so, the waste water is acid waste water, and the improvement of acid waste water is an important work for solving titanium white production environmental pollution
Make.
The content of the invention
It is used to produce calcium hydrophosphate fodder to develop high-magnesium-phosphorus ore resource, while acid waste water is reclaimed,
It is used for the closed circulation process that phosphorus ore is pre-processed the invention provides a kind of sulfuric acid method titanium pigment acid waste water.
The technical solution adopted in the present invention is：Sulfuric acid method titanium pigment acid waste water is used for the closed circulation that phosphorus ore is pre-processed
Technique, comprises the following steps：
A, phosphorus ore is crushed and is beaten after, thereto add acid waste water carry out de-magnesium reaction, obtain 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, de-magging phosphorus ore filter cake sent
Toward follow-up technique productions calcium hydrophosphate fodder；
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；
After E, the clarified processing of filtrate, for a washing step in sulfuric acid method titanium pigment production technology to thick metatitanic acid
Slurry is washed, and it is acid waste water that wash water is produced after washing；
Add water and recycled after moisturizing processing in return to step A in F, oxytropism waste water, so as to realize closing
Circulation.
In the present invention, inventor proposes that de-magging processing, acid waste water sheet can be carried out to high-magnesium-phosphorus ore using acid waste water
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 acid waste water have found outlet.Experiment proves to may be such that magnesium in phosphorus ore after carrying out de-magging to phosphorus ore using acid waste water
Content reduction by 70~95%, phosphorus loss late is only within 0.1~0.5%.
But inventor has found in research and production, due to containing a large amount of impurity in acid waste water, 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 must be all water totally enclosed circulations for the environmental requirement of phosphorus product Chemical Manufacture enterprise, must not have production, technique to use
Water is discharged.This defect undoubtedly causes serious obstruction to the popularization of the technique.
Invention finds that the main component of the de-magging mother liquor produced during acid waste water pre-treating phosphorite is sulphur under study for action
Acid, ferrous sulfate, magnesium sulfate and micro other impurities.Inventor's proposition can carry out neutralisation treatment to it, can by neutralisation treatment
So that wherein most impurity formation precipitation, can be removed by separation of solid and liquid, almost comprised only in obtained filtrate few
The dissolving calcium sulfate and iron ion of amount, how according to the water quality situation, scientific and reasonable carry out closed circulation utilization is to solve to use
The key of water seal closed loop.
In sulfuric acid method titanium pigment production technology, the one of thick metatitanic acid slurry washes in the wash water of process generation containing a small amount of
Soluble calcium sulfate and iron ion, therefore the process is to the calcium in slurry, the requirement of the impurity such as iron is relatively low, therefore inventor
Propose that the de-magging mother liquor by neutralization, filtering, clarifying treatment can be used for the once washing of thick metatitanic acid slurry.
The de-magging mother liquor that the present invention produces acid waste water pre-treating phosphorite accordingly is in the case where being sufficiently stirred for, in
PH value of solution is adjusted with reagent, filtering, the clarified processing of filtrate is directly used in thick washing step of metatitanic acid, the wash water of generation
As by-product acid waste water, by-product acid waste water is re-used for phosphorus ore pretreatment, so as to realize the purpose of closed circulation.Due to pre-
The eat liquid and the evaporation of moisture of filter cake cause the closed cycle system total Water to reduce in processing mother liquor N-process, only need to be to being
System carries out appropriate moisturizing.
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 the method such as centrifugal sedimentation.
As a further improvement on the present invention, step C neutralization terminal is：After obtained neutralization in slurry liquid phase pH ＞
5, so that neutralization reaction carries out abundant, the soluble impurity content after reduction in subsequent filtrate.
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, the smashing fineness of phosphorus ore is more than 95% for 100 mesh sieve percent of pass in step A,
To promote follow-up de-magnesium reaction to be carried out with faster reaction rate.
As a further improvement on the present invention, in step, the de-magging mother liquor obtained using step B is beaten phosphorus ore
Slurry.The main purpose being beaten in the present invention using de-magging mother liquor to phosphorus ore is to reduce the consumption of phosphorus ore pulping process reclaimed water, is met
The need for water balance.
As a further improvement on the present invention, the neutralization reagent used in step C is calcium hydroxide reagent.Because using hydrogen
Calcium oxide will not bring the soluble impurity content in subsequent filtrate after substantial amounts of soluble-salt, reduction into.
As a further improvement on the present invention, the neutralization reagent used in step C is calcium hydroxide suspension or carbide slag
Suspension.Calcium hydroxide suspension, which refers to use, obtains calcium oxide after calcination of calcium carbonate, add water and digested, obtained hydrogen-oxygen
Change calcium suspension；After carbide slag is the filter pressing with calcium hydroxide obtained after calcium carbide and water reaction in PVC production technologies, slurrying is obtained；
This programme can further reduce production cost.
The beneficial effects of the invention are as follows：1) pretreatment de-magging is carried out to high-magnesium-phosphorus ore using titanium white by product acid waste water, greatly
The de-magging cost and phosphorus of big reduction high-magnesium-phosphorus ore are damaged, while the recycling for a large amount of acid waste waters have found outlet；2) provide
The closed loop process of the de-magging mother liquor containing a large amount of impurity due to carrying out de-magging generation to phosphorus ore with acid waste water, overcomes
The problem for hindering this method industrially to promote；3) sulfuric acid method titanium pigment production technology is realized to produce with calcium hydrophosphate fodder
The combination of technique, the accessory substance that two kinds of techniques are produced is mutually using simultaneously closed circulation, with very high economical and environmentally friendly valency
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：
Acid waste water is pre-processed for phosphorus ore in accordance with the following methods and closed circulation is realized：
1st, high-magnesium-phosphorus ore (P is taken2O5=28%, MgO=5.0%) 1kg, add 2kg steps 3 in de-magging mother liquor, use ball milling
It is 96% that machine, which carries out wet-milling to 100 mesh sieve percent of pass, and obtained ore pulp is injected into pretreatment tank；
2nd, pH=3.1 acid waste water 2.4L is added into pretreatment tank, de-magnesium reaction 30min is carried out under the conditions of 50 DEG C
After obtain de-magging slurry；
3rd, separation of solid and liquid is carried out to de-magging slurry, obtains de-magging phosphorus ore filter cake and de-magging mother liquor, detect phosphorus ore demagnesium rate, will
De-magging phosphorus ore filter cake is sent to subsequent technique production calcium hydrophosphate fodder；
4th, while stirring toward milk of lime is added in de-magging mother liquor, the addition of control milk of lime makes slurry pH=5.2, cured
After 40min, slurry after neutralization is carried out to be filtrated to get filter cake and filtrate, filtrate obtains supernatant liquor after standing clarification 30min, examined
Survey clear liquid iron content；
5th, thick metatitanic acid slurry (TiO is taken2=300g/l, Fe/TiO2=2000ppm) 1kg, above-mentioned clear liquid is used to wash
The thick metatitanic acid slurry, washing terminal for produce washing lotion in iron content be less than 1000ppm, detection washing after the total titanium of metatitanic acid,
It is beaten iron；
6th, the acid waste water (washing lotion) of generation recycle in return to step 2 after moisturizing.
7th, as procedure described above, circular flow 50 times, every 5 times to phosphorus ore demagnesium rate, clear liquid iron content, the total titanium of metatitanic acid,
It is beaten iron and carries out analysis contrast, the results are shown in Table 1.
Table 1：Phosphorus ore demagnesium rate, clear liquid iron content, the total titanium of metatitanic acid, mashing iron Analysis of test results contrast table
Claims (7)
1. sulfuric acid method titanium pigment acid waste water is used for the closed circulation process that phosphorus ore is pre-processed, comprise the following steps：
A, phosphorus ore is crushed and is beaten after, thereto add acid waste water carry out de-magnesium reaction, obtain 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；
After E, the clarified processing of filtrate, for a washing step in sulfuric acid method titanium pigment production technology to thick metatitanic acid slurry
Washed, it is acid waste water that wash water is produced after washing；
Add water and recycled after moisturizing processing in return to step A in F, oxytropism waste water, so as to realize closed circulation.
2. sulfuric acid method titanium pigment acid waste water according to claim 1 is used for the closed circulation process that phosphorus ore is pre-processed, its
It is characterised by：Step C neutralization terminal is：After obtained neutralization in slurry liquid phase pH ＞ 5.
3. sulfuric acid method titanium pigment acid waste water according to claim 1 is used for the closed circulation process that phosphorus ore is pre-processed, its
It is characterised by：The reaction temperature of step A de-magnesium reactions is 40~60 DEG C, and the reaction time is 30~90 minutes.
4. the sulfuric acid method titanium pigment acid waste water according to any claim in claims 1 to 3 is pre-processed for phosphorus ore
Closed circulation process, it is characterised in that：The smashing fineness of phosphorus ore is that 100 mesh sieve percent of pass are more than 95% in step A.
5. the sulfuric acid method titanium pigment acid waste water according to any claim in claims 1 to 3 is pre-processed for phosphorus ore
Closed circulation process, it is characterised in that：In step, the de-magging mother liquor obtained using step B is beaten to phosphorus ore.
6. the sulfuric acid method titanium pigment acid waste water according to any claim in claims 1 to 3 is pre-processed for phosphorus ore
Closed circulation process, it is characterised in that：The neutralization reagent used in step C is calcium hydroxide reagent.
7. the sulfuric acid method titanium pigment acid waste water according to any claim in claims 1 to 3 is pre-processed for phosphorus ore
Closed circulation process, it is characterised in that：The neutralization reagent used in step C is that calcium hydroxide suspension or carbide slag are suspended
Liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272496.1A CN107021466B (en) | 2017-04-24 | 2017-04-24 | Sulfuric acid method titanium pigment acid waste water is used for the pretreated closed circulation process of phosphorus ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272496.1A CN107021466B (en) | 2017-04-24 | 2017-04-24 | Sulfuric acid method titanium pigment acid waste water is used for the pretreated closed circulation process of phosphorus ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107021466A true CN107021466A (en) | 2017-08-08 |
| CN107021466B CN107021466B (en) | 2019-08-02 |
Family
ID=59527962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710272496.1A Active CN107021466B (en) | 2017-04-24 | 2017-04-24 | Sulfuric acid method titanium pigment acid waste water is used for the pretreated closed circulation process of phosphorus ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107021466B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292055A (en) * | 2021-06-25 | 2021-08-24 | 甘肃东方钛业有限公司 | Method for producing phosphoric acid by recycling waste sulfuric acid and acid wastewater generated in titanium dioxide production process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2111457B1 (en) * | 1995-05-22 | 1999-07-01 | Turol Trading S L | PHOSPHATE FERTILIZER WITH SULFUR AND TRACE ELEMENTS FOR ITS AGRICULTURAL AND INDUSTRIAL USE AND PROCEDURE FOR ITS PREPARATION. |
| 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 |
| 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 |
| CN103274462A (en) * | 2013-03-15 | 2013-09-04 | 四川龙蟒钛业股份有限公司 | Method for recycling acidic washing water in rutile titanium dioxide production process |
-
2017
- 2017-04-24 CN CN201710272496.1A patent/CN107021466B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2111457B1 (en) * | 1995-05-22 | 1999-07-01 | Turol Trading S L | PHOSPHATE FERTILIZER WITH SULFUR AND TRACE ELEMENTS FOR ITS AGRICULTURAL AND INDUSTRIAL USE AND PROCEDURE FOR ITS PREPARATION. |
| 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 |
| 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 |
| CN103274462A (en) * | 2013-03-15 | 2013-09-04 | 四川龙蟒钛业股份有限公司 | Method for recycling acidic washing water in rutile titanium dioxide production process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292055A (en) * | 2021-06-25 | 2021-08-24 | 甘肃东方钛业有限公司 | Method for producing phosphoric acid by recycling waste sulfuric acid and acid wastewater generated in titanium dioxide production process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107021466B (en) | 2019-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107720801B (en) | A method of blanc fixe is prepared using titanium white waste acid | |
| CN109290060A (en) | A kind of process for subsequent treatment and phosphate ore floatation method of phosphate ore flotation tailings | |
| CN103588235B (en) | Method for producing polyaluminium sulfate by using red mud slag | |
| CN102703696B (en) | Method for recovering valuable metal from red soil nickel minerals comprehensively | |
| CN104480314A (en) | Method for recycling waste residue in manganese industry production | |
| CN102336433A (en) | Pretreatment method in the process of preparing titanium dioxide by reusing acidolysis residues | |
| RU2727382C1 (en) | Method of producing magnesium sulphate from magnesium-containing raw material | |
| CN104086027B (en) | Method for treating titanium dioxide wastewater through sulfuric acid process | |
| CN103058253A (en) | Method for preparing gypsum by free sulfuric acid in titanium dioxide wastewater | |
| CN106365197A (en) | Recycling method of titanium dioxide waste acid | |
| CN106892453A (en) | The method that washing filtrate is used for acidolysis leaching | |
| CN103274462B (en) | Method for recycling acidic washing water in rutile titanium dioxide production process | |
| CN108383094A (en) | The method for preparing calcium monohydrogen phosphate and ammonium chloride using reverse flotation phosphorus tailing | |
| CN104480315A (en) | Method for recycling leached and press-filtered residues generated in production of electrolytic metal manganese and manganese dioxide | |
| CN100515955C (en) | Method for preparing iron oxide red from red mud | |
| CN101591011B (en) | Method for treating waste acid into calcium hydrophosphate fertilizer | |
| CN104108814A (en) | Method for treating rutile titanium dioxide waste water | |
| CN107021466B (en) | Sulfuric acid method titanium pigment acid waste water is used for the pretreated closed circulation process of phosphorus ore | |
| CN113060752A (en) | Recycling method of fluorite flotation tailings | |
| CN207361808U (en) | A kind of titanium white waste acid utilization system | |
| CN106882839B (en) | Method for comprehensively utilizing titanium white waste acid | |
| CN110835120A (en) | Efficient acidolysis process for titanium concentrate | |
| CN115305574B (en) | Method for rapidly preparing whisker by using phosphogypsum and saline | |
| CN106749012A (en) | A kind of method that resource circulation utilization improves quinaldine purity | |
| CN115650276A (en) | Comprehensive recovery method of phosphogypsum resources |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 618200 Mianzhu new town industrial concentration area, Sichuan, Deyang Patentee after: Longbai Sichuan Titanium Co., Ltd Address before: 618200 Mianzhu new town industrial concentration area, Sichuan, Deyang Patentee before: SICHUAN LOMON TITANIUM Co.,Ltd. |