CN108384945A - A method of alkali containing fosfosiderite soaks dephosphorization - Google Patents
A method of alkali containing fosfosiderite soaks dephosphorization Download PDFInfo
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- CN108384945A CN108384945A CN201810178580.1A CN201810178580A CN108384945A CN 108384945 A CN108384945 A CN 108384945A CN 201810178580 A CN201810178580 A CN 201810178580A CN 108384945 A CN108384945 A CN 108384945A
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- Prior art keywords
- dephosphorization
- iron ore
- alkali
- phosphorus
- fosfosiderite
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/11—Removing sulfur, phosphorus or arsenic other than by roasting
-
- 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
- C01B25/30—Alkali metal phosphates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/0015—Obtaining aluminium by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of methods that alkali containing fosfosiderite soaks dephosphorization, belong to the dephosphorizing technology field containing fosfosiderite.To contain that fosfosiderite is broken, fine grinding, will be after fine grinding carry out mixing leaching containing fosfosiderite or high phosphorus iron ore concentrate and certain density alkali leaching liquor.Qualified dephosphorization iron ore or iron ore concentrate are prepared after separation of solid and liquid.Leachate evaporation is then cooled into the crystallization of sodium phosphate crude salt and is precipitated.The high aluminum solutions of dephosphorization that part is precipitated to raw phosphoric acid sodium evaporate and are passed through CO2, adjustment solution composition Al2O3、Na2O content, kind point prepare aluminium hydroxide, and aluminium hydroxide calcining prepares aluminium oxide.The present invention can realize that lye recycles while by-product aluminium oxide, sodium phosphate product, and the present invention can provide technical support for the low cost containing fosfosiderite or high phosphorus iron ore concentrate, higher value application.
Description
Technical field
The invention belongs to the dephosphorizing technology fields containing fosfosiderite, are related to one kind alkali from containing fosfosiderite or high phosphorus iron ore concentrate and soak
The method of dephosphorization especially realizes that lye recycles, and prepares aluminium, phosphorus byproduct.
Background technology
There are a large amount of phosphorus-containing iron ores on earth's crust surface, wherein in the areas North America Superior, the areas Minnesota, north
The area such as Europe, Australia, Saudi Arabia is with the presence of the phosphorous weak-magnetic iron ore of big reserves.The high-phosphorus iron ore in China
The areas such as the Inner Mongol of Yunnan of the Yangtze river basin, Sichuan, Hubei, Hunan, Anhui, Jiangsu and North China are distributed mainly on, it is high
The reserves of ferrophosphorus ore is 744,500,000,000 tons, accounts for the 14.86% of the total reserves of national iron ore deposit.
China's high-phosphorus hematite is largely oolitic texture, and the mineral composition of phosphorus-containing iron ore is complicated, the embedding cloth grain of Phosphate minerals
Spend tiny, phosphorus in iron ore is mainly total with other mineral in the form of apatite, collophane, crandallite, fluor-apatite etc.
Raw, dip dyeing is in the grain edges of Iron Oxide Minerals, and embedding to be distributed in quartz or carbonate mineral, a small amount of preservation is in the lattice of iron mineral
In.And phosphorite crystal is mainly in the form of a column, is needle-shaped, collection is brilliant or shot shape is embedding is distributed in iron mineral and gangue mineral, granularity is smaller
Even at 2 μm hereinafter, be not readily separated, belong to refractory ore, therefore common beneficiation method hardly results in and meets smelting requirements
Iron ore concentrate.
For a long time, make this part iron ore deposit from being had due to not developing ideal phosphorus removal methods
The utilization of effect causes the mine having because phosphorous Gao Erting is adopted, and some mines have seriously affected the matter of iron ore concentrate because of phosphorus content height
Amount and sale.
National standard and ministry standard provide that phosphorus content highest must not exceed 0.04% in high-quality steel.In iron and steel enterprise, to general
The requirement of logical steel phosphorus content is typically less than 0.045%, and for certain more demanding special steel grades, phosphorus content is generally
0.008%~0.015%.In long flow steel making working procedure, phosphorus is mainly removed in converter, and phosphorus is easily aoxidized, the oxidation of generation
Product P2O5Generation stable compound is combined to enter in clinker with basic anhydride.Capacity of the P elements in molten steel and in clinker
It is limited, so dephosphorization rate is also to have certain limit.If high-phosphorus hematite is directly used in blast furnace process, the phosphorus of molten iron contains
Amount is produced standard compliant ordinary steel and is then just needed to take off 95% or more phosphorus using converter, converter is most about 1% or so
High dephosphorization rate is generally 85% or so.Therefore pre- dephosphorization treatment must be carried out to existing high-phosphorus iron ore, steel could be used for
Production.
The recycling and utilization of high-phosphorus iron ore are the important research direction of current emtallurgy research worker, the groundwork of research
There are beneficiating method, chemical method, microbial method and smelting etc..Beneficiating method is mainly normal reselection, magnetic separation, gravity treatment-magnetic separation, stage mill
The research of the kinds of processes such as mine-strong magnetic-reverse flotation dephosphorization, direct reverse flotation dephosphorization, column flotation.
Chemical method dephosphorization is exactly to carry out acidleach dephosphorization to ore with sulfuric acid, hydrochloric acid or nitric acid etc..Lot of domestic and foreign research
Show that Chemical Leaching is one of the effective means of phosphorus-containing ore dephosphorization, but because chemical levels are larger, cost it is higher and can not
It is applied in the industrial production.Golden warrier et al. has carried out systematic research to the effect of chemical dephosphorization.The result shows that：Sulfuric acid
It is best to the dephosphorization effect of iron ore, secondly be nitric acid, hydrochloric acid due to its with stronger volatility dephosphorization effect relatively
Difference.When sulfuric acid concentration is 1%, 20min, dephosphorization rate 91.61% are leached at room temperature, the iron loss during acidleach is less than
0.25%.
Biological dephosphorization in recent years, is taken off using microorganism since most bacteriums, fungi, actinomyces all have Soluble phosphorus effect
The research of phosphorus is very active.These microorganisms make Phosphate minerals dissolve by being metabolized the pH value of the sour reduction system of production.Metabolic acid simultaneously
With Ca2+、Mg2+、A13+The complex compound of the chelating formation of plasma further contributes to the dissolving of Phosphate minerals.Studies have shown that ferrous oxide
System pH value can be greatly reduced in Thiobacillus (T.f bacterium) etc., and the metabolic acid of generation makes the significant effect of biological dephosphorization.Huang Jianling
Et al. sample ore is pre-processed with Thiobacillus, insoluble sulfide, which is converted into soluble sulfuric acid, to be made to contain in iron ore
The fine calcium phosphate in portion is able to exposure and is convenient for that chemical reaction dissolution occurs in the solution.The result shows that by Soluble phosphorus agent into one
Phosphorus content in iron ore can be down to 0.20% or less by the synergistic effect of step by 0.35%.
Smelting mainly has sintering gasification dephosphorization, reduction roasting to synchronize dephosphorization, flash magnetization roasting-magnetic separation, magnetizing roast-
The techniques such as magnetic separation-fine grinding desliming-reverse flotation dephosphorization, raw ore reverse flotation-roasting-magnetic separation.Wang Hui etc. has studied high-phosphorus iron ore gasification
The experiment of dephosphorization.CaCl is added in sintering process2The P element in high-phosphorus hematite can be made with PCl3Gas form is with sintering
Exhaust gas is discharged；When mixed carbon comtent is 4%, heating temperature is 900 DEG C, CaCl2Addition is 1.36%, makes ore by adding lime
When basicity increases to 1.2, dephosphorization rate reaches 18.3%, and dephosphorization effect is bad.
He Yang etc. has studied reduction roasting and synchronizes dephosphorization experiment, is 2 in coal and sample ore mass ratio：5, Dephosphorising agent and mineral amount
Than for l：2, recovery time 50min, the roasted product that reduction temperature generates under conditions of being 950 DEG C is through low intensity magnetic separation, concentrate iron
For grade up to 93.46%, concentrate phosphorus content only has 0.05%.
The prior art of the dephosphorization containing fosfosiderite is also deposited in terms of phosphorus removal efficiency, dephosphorization cost and synthetical recovery containing fosfosiderite
In some shortcomings, low cost containing fosfosiderite, higher value application are affected.
Invention content
The purpose of the invention is to overcome the shortcomings of in existing dephosphorizing technology containing fosfosiderite, for the phosphorus master in iron ore
It to propose to destroy mine using alkali leaching in the form of apatite, collophane, crandallite, fluor-apatite etc. with other mineral intergrowths
Object phase makes aluminium, phosphorus enter leachate, achievees the purpose that remove phosphorus.Present invention offer is a kind of to use alkaline process from containing fosfosiderite or height
The method that phosphorus is removed in ferrophosphorus concentrate, while being recycled by lye, by-product aluminium oxide, sodium phosphate product.The present invention can be
Low cost, higher value application containing fosfosiderite provide technical support.
For achieving the above object, the present invention provides a kind of method of the leaching of alkali containing fosfosiderite dephosphorization, includes the following steps：
(1) raw material granularity refines：So that phosphorous iron ore raw material is refined by mechanical means, controls phosphorous iron ore raw material granularity.
Phosphorous iron ore raw material includes the high phosphorus iron ore concentrate after phosphorus-containing iron ore and ore dressing, and phosphorus-containing iron ore needs broken, fine grinding processing, choosing
High phosphorus iron ore concentrate after mine according to circumstances carries out fine grinding processing.
(2) alkali soaks dephosphorization：The phosphorous iron ore raw material that step (1) is obtained carries out alkali leaching processing, and solid-liquor separation obtains qualification
Iron ore and leachate containing aluminium, phosphorus；Leachate containing aluminium, phosphorus supplements caustic alkali, circulating leaching, enrichment aluminium, phosphorus content.
(3) sodium phosphate is prepared：It will be enriched to the certain density leachate containing aluminium, phosphorus, a certain concentration is evaporated to and drops
After low temperature, raw phosphoric acid sodium and the high aluminum solutions of dephosphorization are precipitated in crystallization；Raw phosphoric acid sodium is further processed preparing phosphoric acid sodium product；Part
The high aluminum solutions of dephosphorization enter step (4) and prepare aluminium oxide, and dephosphorization high aluminum solutions return to step (2) in part carries out phosphorous iron ore raw material
Alkali soak dephosphorization.
(4) aluminium oxide is prepared：By the high aluminum solutions of part dephosphorization of step (3), it is evaporated and is passed through CO2, adjust solution
Middle Al2O3、Na2O concentration crystallizes and sodium carbonate is precipitated to certain content；Solution after separation sodium carbonate prepares hydroxide through kind point
Aluminium, separation of solid and liquid obtain aluminium hydroxide and seed precipitation solution, and aluminium hydroxide produces aluminium oxide through calcining；Seed precipitation solution return to step
(2) alkali for carrying out phosphorous iron ore raw material soaks dephosphorization.
Further, in order to improve alkali leaching effect and efficiency, phosphorous iron ore raw material granularity is controlled in step (1), is to make to contain
Fosfosiderite raw material particle size accounts for 70% or more 0.074mm is below.
Further, effect and efficiency are soaked in order to improve alkali, alkali soaks dephosphorization, 50-200 DEG C of extraction temperature, leaching in step (2)
Go out time 1-10h, naoh concentration 50-220g/L, liquid-solid ratio 2:1-8:1.
Further, under the premise of phosphorus removal effect in ensureing iron ore, aluminum concentration is carried out for follow-up economic recovery aluminium
Enrichment.In step (2) circulating leaching balance when, containing aluminium, phosphorus leachate in Al2O3Content is 30-60g/L.
Further, the solubility of sodium phosphate is with Na2The raising of O concentration and temperature reduce, and solubility drastically reduces, can
To carry out the precipitation of sodium phosphate using crystallisation.The flush distillation of circulating leaching liquid is to Na in step (3)2O content 200-260g/L,
It is then cooled to 20-30 DEG C, microcosmic salt is added at this temperature and is stirred as crystal seed, the crystallization of sodium phosphate crude salt is formed and is precipitated.
Further, solution composition is after control separation sodium carbonate in step (4)：Al2O3Content 110-130g/L, Na2O
Content 105-125g/L, caustic ratio αk1.5-1.7。
Further, seed precipitation solution and the high molten aluminum mixing of the part dephosphorization of step (3) in step (4), be added step (3) and
The condensed water that step (4) evaporation generates, after supplement alkali adjustment alkali concentration return to step (2) carry out phosphorous iron ore raw material alkali leaching it is de-
Phosphorus.
A kind of method of the leaching of alkali containing fosfosiderite dephosphorization provided by the invention, solves difficult choosing and carries out ore dressing dephosphorization iron containing fosfosiderite
The problem that the rate of recovery is low, phosphorus content is exceeded；Chemical dephosphorization is mainly acidleach dephosphorization, but that there are chemical levels is larger, iron leaching
Go wrong, cost it is higher.Metallurgy roasting dephosphorization temperature is high, and phosphorus removal effect is bad.
0.05%~0.2% is required to the phosphorous of iron ore concentrate according to the current country.The present invention proposes to destroy iron using alkali leaching
The forms mineral facies such as the thin apatite of disseminated grain size, collophane, crandallite, fluor-apatite, make aluminium, phosphorus enter leaching in mine
Liquid obtains qualified iron ore of the P content less than 0.2%, 98% or more iron recovery after solid-liquor separation, while lye can realize itself
Cycle, by-product phosphorus, aluminium product.This technology iron recovery is high, can be recycled without high-temperature roasting operation, chemical reagent alkali, iron ore
Middle aluminium phosphorus realizes recycling, therefore alkali leaching dephosphorization is the economical and effective method of phosphorus-containing ore dephosphorization.
Description of the drawings
Attached drawing is the principle flow chart of the method for the present invention.
Specific implementation mode
Further explanation is made to the present invention below in conjunction with attached drawing.
The broken, fine grinding by phosphorus-containing iron ore, wherein grain size account for 70% or more 0.074mm is below, if ore dressing output
High phosphorus iron ore concentrate, visual particle sizes are handled, if granularity is thicker, is finely ground to grain size and is accounted for 0.074mm is below
70% or more.
Mixing leaching will be carried out containing fosfosiderite or high phosphorus iron ore concentrate and certain density alkali leaching liquor after fine grinding, controlled
Technological parameter processed is 50-200 DEG C of extraction temperature, extraction time 1-10h, naoh concentration 50-220g/L, liquid-solid ratio 2:1-8:
1。
After leaching solid-liquid separation on ore pulp, alkali soaks the theoretical caustic alkali of dephosphorization liquid supplement, and circulating leaching is enriched with aluminium content, makes cycle
Al in leachate2O3Content 30-60g/L.
Circulating leaching liquid is evaporated to Na2O content 200-260g/L is then cooled to 20-30 DEG C, adds phosphorus at this temperature
Salt is stirred as crystal seed, is formed the crystallization of sodium phosphate crude salt and is precipitated, raw phosphoric acid sodium is further processed preparing phosphoric acid sodium product, is precipitated
The solution of raw phosphoric acid sodium is the high aluminum solutions of dephosphorization.Evaporation condensed water can return to leaching.
Dephosphorization high aluminum solutions in part are evaporated and are passed through CO2, crystallize and sodium carbonate be precipitated, detach solution composition after sodium carbonate
Al2O3Content 110-130g/L, Na2O content 105-125g/L, caustic ratio αk1.5-1.7, kind point prepare aluminium hydroxide, hydrogen-oxygen
Change aluminium calcining and prepares aluminium oxide.Seed precipitation solution and the high molten aluminum mixing of another part dephosphorization come back for phosphorous after adjusting alkali concentration
The alkali of iron ore or high phosphorus iron ore concentrate soaks dephosphorization.
The method of the present invention is further described with nonlimiting examples below, to help to understand the present invention's
Content and its advantage, and not as limiting the scope of the present invention, protection scope of the present invention is determined by claims.
The present invention is applicable in the iron ore or iron ore concentrate of different phosphorus contents.Following table is that iron ore concentrate used by present invention experiment is main
Ingredient.
| Main component | Al2O3 | TFe | P |
| Content (%) | 4.5 | 54 | 1.21 |
Embodiment 1
Iron ore concentrate is mixed with 100g/L NaOH solutions and is leached, liquid-solid ratio 5 is leached:1,90 DEG C, time 2h of temperature,
After separation of solid and liquid, at this point, the leaching rate 85% of aluminium, the leaching rate 80% of phosphorus.
Embodiment 2
Iron ore concentrate is mixed with 200g/L NaOH solutions and is leached, liquid-solid ratio 6 is leached:1,95 DEG C, time 3h of temperature,
After separation of solid and liquid, at this point, the leaching rate 92% of aluminium, the leaching rate 85% of phosphorus.
Embodiment 3
Iron ore concentrate is mixed with 100g/L NaOH solutions and is leached, liquid-solid ratio 8 is leached:1, temperature 50 C, time 2h,
After separation of solid and liquid, at this point, the leaching rate 72% of aluminium, the leaching rate 70% of phosphorus.
Embodiment 4
Iron ore concentrate is mixed with 100g/L NaOH solutions and is leached, liquid-solid ratio 8 is leached:1,150 DEG C, time 1h of temperature,
After separation of solid and liquid, at this point, the leaching rate 95% of aluminium, the leaching rate 93% of phosphorus.
Embodiment 5
1000g iron ore concentrates are mixed with 200g/L NaOH solutions and are leached, liquid-solid ratio 4 is leached:1,95 DEG C of temperature, when
Between 1h, after separation of solid and liquid, at this point, the leaching rate 90% of aluminium, the leaching rate 85% of phosphorus.Al in leachate2O3 10.1g/L、P
2.58g/L supplements theoretical aluminium, phosphorus consumption NaOH 72g, carries out circulating leaching, after recycling 5 times, Al in equilibrium liquid2O3Content
50.5g/L, phosphorus content 12.9g/L or so (P content is each leaching content, a concentration of 2.58g/L after system balancing returns to leaching),
Na2O167g/L。
Vaporization cycle leachate 35%, liquor capacity concentration is 2600ml, makes Na in solution2Thick phosphorus is precipitated in O 250g/L
Sour sodium, raw phosphoric acid sodium carry out recrystallization and prepare sodium phosphate product.Obtain the high aluminum solutions of dephosphorization, at this time P content 0.2g/L in solution,
Al2O3Content 77.6g/L, Na2O 250g/L, caustic ratio αk5.3 left and right.
The high aluminum solutions of 1040ml dephosphorizations (i.e. each iron ore leaches 2 times of aluminum amount) are taken to be passed through CO2, sodium carbonate is precipitated, reduces
Caustic ratio, while double evaporation-cooling 35% or so, liquor capacity concentration are 675ml, improve Al2O3Content is to 120g/L, Na2O contains
Measure 115g/L or so, caustic ratio αk1.6 left and right.Kind divides rate 50%, and aluminium hydroxide is precipitated, and calcining prepares aluminium oxide.
Seed precipitation solution 675ml (Al2O359g/L, Na2O 115g/L) and the high aluminum solutions 1560ml of dephosphorization (P 0.2g/L,
Al2O377.6g/L Na2O 250g/L), supplying crystallization water 1400ml, secondary crystallization water 365ml mix (Al2O340.2g/L),
NaOH is supplemented, new iron ore leaching is carried out.
Claims (7)
1. a kind of method of the leaching of alkali containing fosfosiderite dephosphorization, which is characterized in that include the following steps：
(1) raw material granularity refines：So that phosphorous iron ore raw material is refined by mechanical means, controls phosphorous iron ore raw material granularity；
(2) alkali soaks dephosphorization：The phosphorous iron ore raw material that step (1) is obtained carries out alkali leaching processing, and solid-liquor separation obtains qualified iron ore
With the leachate containing aluminium, phosphorus；Leachate containing aluminium, phosphorus supplements caustic alkali, circulating leaching, enrichment aluminium, phosphorus content；
(3) sodium phosphate is prepared：It will be enriched to the certain density leachate containing aluminium, phosphorus, a certain concentration is evaporated to and reduces temperature
After degree, raw phosphoric acid sodium and the high aluminum solutions of dephosphorization are precipitated in crystallization；Raw phosphoric acid sodium is further processed preparing phosphoric acid sodium product；Part dephosphorization
High aluminum solutions enter step (4) and prepare aluminium oxide, and dephosphorization high aluminum solutions return to step (2) in part carries out the alkali of phosphorous iron ore raw material
Soak dephosphorization；
(4) aluminium oxide is prepared：By the high aluminum solutions of part dephosphorization of step (3), it is evaporated and is passed through CO2, adjust in solution
Al2O3、Na2O concentration crystallizes and sodium carbonate is precipitated to certain content；Solution after separation sodium carbonate prepares aluminium hydroxide through kind point,
Separation of solid and liquid obtains aluminium hydroxide and seed precipitation solution, and aluminium hydroxide produces aluminium oxide through calcining；Seed precipitation solution return to step (2) into
The alkali of the phosphorous iron ore raw material of row soaks dephosphorization.
2. according to the method described in claim 1, it is characterized in that, the middle phosphorous iron ore raw material granularity of control of step (1), is to make to contain
Fosfosiderite raw material particle size accounts for 70% or more 0.074mm is below.
3. according to the method described in claim 1, it is characterized in that, in step (2) alkali soak dephosphorization, 50-200 DEG C of extraction temperature,
Extraction time 1-10h, naoh concentration 50-220g/L, liquid-solid ratio 2:1-8:1.
4. according to the method described in claim 1, it is characterized in that, in step (2) circulating leaching balance when, the leaching containing aluminium, phosphorus
Go out Al in liquid2O3Content is 30-60g/L.
5. according to the method described in claim 1, it is characterized in that, the flush distillation of circulating leaching liquid is to Na in step (3)2O content
200-260g/L is then cooled to 20-30 DEG C, adds microcosmic salt at this temperature and is stirred as crystal seed, forms sodium phosphate crude salt
Crystallization is precipitated.
6. according to the method described in claim 1, it is characterized in that, solution composition is after control separation sodium carbonate in step (4)：
Al2O3Content 110-130g/L, Na2O content 105-125g/L, caustic ratio αk1.5-1.7。
7. according to the method described in claim 1, it is characterized in that, in step (4) seed precipitation solution and step (3) part dephosphorization
The condensed water of step (3) and step (4) evaporation generation is added in high molten aluminum mixing, supplements return to step (2) after alkali adjustment alkali concentration
Carry out the alkali leaching dephosphorization of phosphorous iron ore raw material.
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| CN109943716A (en) * | 2019-03-26 | 2019-06-28 | 昆明理工大学 | A kind of method that miscellaneous preparation high-quality iron ore concentrate drops in high-phosphor oolitic hematite chemistry |
| CN111778404A (en) * | 2020-08-14 | 2020-10-16 | 眉山顺应动力电池材料有限公司 | Leaching separation method of nickel-cobalt-molybdenum-phosphorus-vanadium alloy material |
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Application publication date: 20180810 |