CN104402025B - A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate - Google Patents
A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate Download PDFInfo
- Publication number
- CN104402025B CN104402025B CN201410704667.XA CN201410704667A CN104402025B CN 104402025 B CN104402025 B CN 104402025B CN 201410704667 A CN201410704667 A CN 201410704667A CN 104402025 B CN104402025 B CN 104402025B
- Authority
- CN
- China
- Prior art keywords
- magnesiumcarbonate
- rough
- slip
- magnesium oxide
- boron
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses and a kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate, comprise step: (1) sieves after rough for magnesiumcarbonate pulverizing; (2) to screening after magnesiumcarbonate rough in add except boron agent, form the first slip; Described except boron agent be bicarbonate solution; (3) the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip; (4) the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying; (5) described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.The method is by adding supercarbonate as removing boron agent, and carry out hydro-thermal reaction and make the insoluble boron compound be present between magnesiumcarbonate crystal be converted into soluble material, and then remove boron impurity through washing, the magnesian high purity more than 98% finally prepared; The method technique is simple, easy to operate, effectively can also make use of salt lake resources simultaneously.
Description
Technical field
The present invention relates to a kind of method preparing high-purity magnesium oxide, particularly relate to and a kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate.
Background technology
High-purity magnesium oxide, generally refers to and is widely used as high-temperature heat-resistance material by the product that content of MgO is greater than 98%, be all widely used in the fields such as optics, instrument, electronics, electrical equipment, metallurgy, national defence and aerospace.The production of high-purity magnesium oxide is generally adopt common magnesium oxide to be raw material, and is realized by special impurity removal process, mainly contains: (1) obtains magnesium hydroxide by various mode, then filters, washs, pyrolysis obtains high-purity magnesium oxide.Because magnesium hydroxide slurry is difficult to be separated and washing in the method, cause foreign matter content in product higher.(2) by first preparing magnesium chloride or magnesium sulfate reheating solution prepares magnesium oxide.The high temperature corrosion gas produced in the method is higher to equipment requirements.(3) by carbon ammonium circulation method, prepare magnesium carbonate hydrate intermediate, high-purity magnesium oxide is produced in calcining further, and the ammonium salt mother liquor mainly for nitrogen fertilizer plant utilizes and designs.(4) bittern-Method of Soda, reacts bittern and soda ash, and throw out, through rinsing, centrifuge dehydration, is first calcined, pulverized, selection by winnowing, obtained light magnesium oxide; Light magnesium oxide is pulverized and pressure ball, then enters high-temperature calcination stove and carry out reheating, final high-purity magnesium oxide.(5) high-purity magnesium metal and the obtained high purity micro mist magnesium oxide of oxygen reaction etc. is utilized.
In the performance history of salt lake, the problem be separated is difficult to for magnesium lithium in sulfate type salt lake brine, researchist adopts carbonate type salt lake to convert halogen mode to reduce Mg/Li ratio or carry in lithium process at salt lake brine and add sodium carbonate demagging, the magnesiumcarbonate generated in these technological processs is rough, containing impurity such as organic boron compounds during this magnesiumcarbonate is rough.In order to make full use of salt lake resources, utilize the Mg in bittern
2+production high-purity magnesium oxide has important practical significance.
In magnesium oxide, the existence of boron compound impurity can make magnesium oxide produce very strong fluxing action, causes the hot strength of refractory materials sharply to decline, in addition the B when reaching certain temperature
2o
3gasification magnesia void content can be caused to increase, the corrosion stability of refractory materials and molten slag and molten steel is reduced.Therefore, need to remove boron compound impurity, to improve magnesian high-temperature behavior in utilizing making from brine for the process of high-purity magnesium oxide.At present, with the solution such as seawater or bittern for raw material prepare in magnesium oxide process except boron technique, mainly comprise following certain methods: (1) crosses alkaline process, prepare magnesian reaction with the solution such as seawater or bittern for raw material to carry out under mistake alkali condition, decrease the absorption of magnesium hydroxide to boron.(2) extraction process, utilizes the mechanism of borate energy shape complex compound in alcoholic medium except boron.Extraction process is mainly applicable to the solution system that boron-containing quantity is 2-18g/L, and subject matter is that the selectivity of existing extraction agent is lower, limits its applicable system.(3) ion-exchange-resin process, utilizes and has the chelate resin of selective adsorption to remove the boron in seawater or bittern, except effect of boron is better to boron; But due to ion exchange resin finite capacity, be mainly applicable to the solution system that boron-containing quantity is less than 30mg/L, when system boron-containing quantity is higher, there is the problem that resin consumptions is large, production cost is high.(4) precipitator method, join in bittern by appropriate mineral acid or alkali, and the boric acid boron of ion like being converted into be insoluble in water or borate are separated out, and reach the object except boron from bittern with this.In above boron removal method, be all use conventional methods dissolving raw material, the boron compound be present between magnesiumcarbonate crystal cannot dissolve, and causes the boron compound impurity of this part to remove.
Summary of the invention
In view of this, the invention provides a kind of from utilizing the rough method preparing high-purity magnesium oxide of magnesiumcarbonate, the method is rough for raw material to extract from sulfate type salt lake brine the by product magnesiumcarbonate produced in the technological process of lithium, prepare high-purity magnesium oxide by removing boron impurity, magnesian purity can reach more than 98%.
For achieving the above object, present invention employs following technical scheme:
Utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate, comprise step:
(1) sieve after rough for magnesiumcarbonate pulverizing;
(2) to screening after magnesiumcarbonate rough in add except boron agent, form the first slip; Described except boron agent be bicarbonate solution;
(3) the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip;
(4) the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying;
(5) described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.
Preferably, in step (1), 60-80 eye mesh screen is used to the rough screening of magnesiumcarbonate after pulverizing.
Preferably, described except boron agent be one or both mixing solutionss in sodium bicarbonate, bicarbonate of ammonia.
Preferably, in step (2), according to mass ratio, what the quality rough according to magnesiumcarbonate added removes boron agent solution liquid-solid ratio is 3:1 ~ 10:1, and wherein, the described mass concentration except boron agent is 3% ~ 9%.
Preferably, described liquid-solid ratio is 5:1 ~ 7:1, and wherein, the described mass concentration except boron agent is 6% ~ 8%.
Preferably, in step (3), the temperature of carrying out hydro-thermal reaction is 110 ~ 180 DEG C, and the reaction times is 2 ~ 10 hours.
Preferably, the temperature of carrying out hydro-thermal reaction is 130 ~ 160 DEG C, and the reaction times is 5 ~ 8 hours.
Preferably, in step (5), calcination temperature is 900 ~ 1200 DEG C, and calcination time is 2 ~ 10 hours.
Preferably, described magnesiumcarbonate is rough for extracting from sulfate type salt lake brine the by product produced the technological process of lithium.
Compared with prior art, in method provided by the invention, by adding supercarbonate as removing boron agent, and carry out hydro-thermal reaction and make the boron compound be present between magnesiumcarbonate crystal be converted into soluble material, and then remove boron impurity through washing, hydro-thermal reaction product is the good anhydrous magnesium carbonate of degree of crystallinity, makes the magnesian high purity more than 98% finally prepared; The method technique is simple, easy to operate, effectively can also make use of salt lake resources simultaneously.
Accompanying drawing explanation
Fig. 1 is the process flow sheet preparing the method for high-purity magnesium oxide that the specific embodiment of the invention provides.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.
Consult Fig. 1, the method preparing high-purity magnesium oxide provided in this embodiment comprises step:
Utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate, comprise step:
S101, to sieve after rough for magnesiumcarbonate pulverizing.Wherein, magnesiumcarbonate is rough for extracting from sulfate type salt lake brine the by product produced the technological process of lithium, such as: adopt carbonate type salt lake brine and sulfate type salt lake brine to convert halogen mode and reduce Mg/Li ratio, or to carry in lithium process in sulfate type salt lake brine and add sodium carbonate demagging, or adopting the boron mud produced in alkali method for producing borax process, its main by product is that magnesiumcarbonate is rough; Rough to the magnesiumcarbonate after pulverizing, 60-80 object screen cloth can be used to sieve.
S102, to screening after magnesiumcarbonate rough in add except boron agent, form the first slip; Described except boron agent be bicarbonate solution.As one or both mixing solutionss in the supercarbonate except boron agent mainly sodium bicarbonate, bicarbonate of ammonia.According to mass ratio, what the quality rough according to magnesiumcarbonate added removes the preferred scope of boron agent solution liquid-solid ratio is 3:1 ~ 10:1, and more preferred scope is 5:1 ~ 7:1.Wherein, the preferred scope of the mass concentration except boron agent is 3% ~ 9%, and more preferred scope is 6% ~ 8%.
S103, the first slip is put into reactor carry out hydro-thermal reaction, obtain the second slip.In a preferred scheme, the temperature of carrying out hydro-thermal reaction is 110 ~ 180 DEG C, and the reaction times is 2 ~ 10 hours.In more preferred scheme, the temperature of carrying out hydro-thermal reaction is 130 ~ 160 DEG C, and the reaction times is 5 ~ 8 hours.
S104, by the second slip through filtering, washing, obtain anhydrous magnesium carbonate after drying.
S105, described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.Wherein, the scope of calcination temperature can be selected to be 900 ~ 1200 DEG C, and calcination time is 2 ~ 10 hours.
In the method provided above, under supercarbonate exists, the rough hydrothermal decomposition of magnesiumcarbonate generates the good anhydrous magnesium carbonate of degree of crystallinity, time in the scope that hydrothermal temperature is 110 ~ 180 DEG C, the fragmentation of magnesiumcarbonate lattice generates in the process of anhydrous magnesium carbonate, bicarbonate radical can and magnesiumcarbonate crystal between insoluble boron compound react and generate solubility boron-containing compound, and then by washing, cross and filter soluble boron compounds, the magnesian high purity more than 98% finally prepared.
Embodiment 1
One, adopt that dragon wood is wrong, to convert halogen (sulfate type and carbonate type salt lake convert halogen) primary products magnesiumcarbonate rough be raw material in Lake Jiezechaka salt lake, in feed composition, main component is the 4MgCO of 67.2%
3mg (OH)
25H
2o, submember is NaCl and a small amount of vitriol and boron-containing compound 0.27% (in B) etc.First will 80 object screen clothes after rough for magnesiumcarbonate pulverizing, be used to sieve, adopt traditional washing, (such as use deionized water is made into slip according to the liquid-solid ratio that weight ratio is 5:1 to the method removal soluble impurity of filtration, filter in a vacuum after mechanical stirring, twice repeatedly).
Two, after screening and remove magnesiumcarbonate except soluble impurity rough in add mass concentration be that the sodium hydrogen carbonate solution of 3% is as except boron agent, wherein, calculate according to mass ratio, sodium hydrogen carbonate solution and the rough liquid-solid ratio of magnesiumcarbonate are 3:1, form the first slip.
Three, the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip.The temperature of carrying out hydro-thermal reaction is 110 DEG C, and the reaction times is 2 hours.
Four, the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying.
Five, described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.Wherein, calcination temperature is 900 DEG C, and calcination time is 2 hours.
Through detecting, the magnesian high purity 98.10% that the present embodiment prepares, Boron contents is 0.083%.
Embodiment 2
One, adopt that dragon wood is wrong, to convert halogen (sulfate type and carbonate type salt lake convert halogen) primary products magnesiumcarbonate rough be raw material in Lake Jiezechaka salt lake, in feed composition, main component is the 4MgCO of 67.2%
3mg (OH)
25H
2o, submember is NaCl and a small amount of vitriol and boron-containing compound 0.27% (in B) etc.First will 60 object screen clothes after rough for magnesiumcarbonate pulverizing, be used to sieve, adopt traditional washing, (such as use deionized water is made into slip according to the liquid-solid ratio that weight ratio is 5:1 to the method removal soluble impurity of filtration, filter in a vacuum after mechanical stirring, twice repeatedly).
Two, after screening and remove magnesiumcarbonate except soluble impurity rough in add mass concentration be that the sodium hydrogen carbonate solution of 9% is as except boron agent, wherein, calculate according to mass ratio, sodium hydrogen carbonate solution and the rough liquid-solid ratio of magnesiumcarbonate are 10:1, magnesiumcarbonate is rough be dissolved in sodium hydrogen carbonate solution after form the first slip.
Three, the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip.The temperature of carrying out hydro-thermal reaction is 180 DEG C, and the reaction times is 10 hours.
Four, the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying.
Five, described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.Wherein, calcination temperature is 1200 DEG C, and calcination time is 10 hours.
Through detecting, the magnesian high purity 99.17% that the present embodiment prepares, Boron contents is 0.0069%.
Embodiment 3
One, adopt that dragon wood is wrong, to convert halogen (sulfate type and carbonate type salt lake convert halogen) primary products magnesiumcarbonate rough be raw material in Lake Jiezechaka salt lake, in feed composition, main component is the 4MgCO of 67.2%
3mg (OH)
25H
2o, submember is NaCl and a small amount of vitriol and boron-containing compound 0.27% (in B) etc.First will 80 object screen clothes after rough for magnesiumcarbonate pulverizing, be used to sieve, adopt traditional washing, (such as use deionized water is made into slip according to the liquid-solid ratio that weight ratio is 5:1 to the method removal soluble impurity of filtration, filter in a vacuum after mechanical stirring, twice repeatedly).
Two, after screening and remove magnesiumcarbonate except soluble impurity rough in add mass concentration be that the sodium hydrogen carbonate solution of 6% is as except boron agent, wherein, calculate according to mass ratio, sodium hydrogen carbonate solution and the rough liquid-solid ratio of magnesiumcarbonate are 7:1, form the first slip.
Three, the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip.The temperature of carrying out hydro-thermal reaction is 160 DEG C, and the reaction times is 5 hours.
Four, the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying.
Five, described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.Wherein, calcination temperature is 1100 DEG C, and calcination time is 5 hours.
Through detecting, the magnesian high purity 99.03% that the present embodiment prepares, Boron contents is 0.021%.
Embodiment 4
One, adopt that dragon wood is wrong, to convert halogen (sulfate type and carbonate type salt lake convert halogen) primary products magnesiumcarbonate rough be raw material in Lake Jiezechaka salt lake, in feed composition, main component is the 4MgCO of 67.2%
3mg (OH)
25H
2o, submember is NaCl and a small amount of vitriol and boron-containing compound 0.27% (in B) etc.First will 80 object screen clothes after rough for magnesiumcarbonate pulverizing, be used to sieve, adopt traditional washing, (such as use deionized water is made into slip according to the liquid-solid ratio that weight ratio is 5:1 to the method removal soluble impurity of filtration, filter in a vacuum after mechanical stirring, twice repeatedly).
Two, after screening and remove magnesiumcarbonate except soluble impurity rough in add mass concentration be 8% sodium bicarbonate with bicarbonate of ammonia mixing solutions as removing boron agent, wherein, calculate according to mass ratio, sodium hydrogen carbonate solution and the rough liquid-solid ratio of magnesiumcarbonate are 5:1, magnesiumcarbonate is rough be dissolved in sodium hydrogen carbonate solution after form the first slip.
Three, the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip.The temperature of carrying out hydro-thermal reaction is 130 DEG C, and the reaction times is 8 hours.
Four, the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying.
Five, described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.Wherein, the scope of calcination temperature can be selected to be 1100 DEG C, and calcination time is 5 hours.
Through detecting, the magnesian high purity 99.25% that the present embodiment prepares, Boron contents is 0.043%.
In sum, compared with prior art, in method provided by the invention, by adding supercarbonate as removing boron agent, under supercarbonate exists, the rough hydrothermal decomposition of magnesiumcarbonate generates the good anhydrous magnesium carbonate of degree of crystallinity, time in the scope that hydrothermal temperature is 110 ~ 180 DEG C, the fragmentation of magnesiumcarbonate lattice generates in the process of tiny anhydrous magnesium carbonate, bicarbonate radical can and magnesiumcarbonate crystal between (referring between crystal described herein between inclusion between crystal or lattice) insoluble boron compound react and generate solubility boron-containing compound, and then by washing, cross and filter soluble boron compounds, the magnesian high purity more than 98% finally prepared, and the method technique is simple, easy to operate, effectively can also make use of salt lake resources simultaneously.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the application.
Claims (8)
1. utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate, it is characterized in that, comprise step:
(1) sieve after rough for magnesiumcarbonate pulverizing;
(2) to screening after magnesiumcarbonate rough in add except boron agent, form the first slip; Described except boron agent be bicarbonate solution; Wherein, according to mass ratio, what the quality rough according to magnesiumcarbonate added removes boron agent solution liquid-solid ratio is 3:1 ~ 10:1, and wherein, the described mass concentration except boron agent is 3% ~ 9%;
(3) the first slip is put into reactor and carry out hydro-thermal reaction, obtain the second slip;
(4) the second slip is obtained anhydrous magnesium carbonate after filtration, washing, drying;
(5) described anhydrous magnesium carbonate is obtained high-purity magnesium oxide through calcination.
2. method according to claim 1, is characterized in that, in step (1), uses 60-80 eye mesh screen to the rough screening of magnesiumcarbonate after pulverizing.
3. method according to claim 1, is characterized in that, described except boron agent be one or both mixing solutionss in sodium bicarbonate, bicarbonate of ammonia.
4. method according to claim 1, is characterized in that, described liquid-solid ratio is 5:1 ~ 7:1, and wherein, the described mass concentration except boron agent is 6% ~ 8%.
5. method according to claim 1, is characterized in that, in step (3), the temperature of carrying out hydro-thermal reaction is 110 ~ 180 DEG C, and the reaction times is 2 ~ 10 hours.
6. method according to claim 5, is characterized in that, the temperature of carrying out hydro-thermal reaction is 130 ~ 160 DEG C, and the reaction times is 5 ~ 8 hours.
7. method according to claim 1, is characterized in that, in step (5), calcination temperature is 900 ~ 1200 DEG C, and calcination time is 2 ~ 10 hours.
8. according to the arbitrary described method of claim 1-7, it is characterized in that, described magnesiumcarbonate is rough for extracting from sulfate type salt lake brine the by product produced the technological process of lithium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704667.XA CN104402025B (en) | 2014-11-27 | 2014-11-27 | A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704667.XA CN104402025B (en) | 2014-11-27 | 2014-11-27 | A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104402025A CN104402025A (en) | 2015-03-11 |
| CN104402025B true CN104402025B (en) | 2016-04-13 |
Family
ID=52639712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410704667.XA Active CN104402025B (en) | 2014-11-27 | 2014-11-27 | A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104402025B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182931B1 (en) * | 1984-11-27 | 1990-02-28 | GebràDer Sulzer Aktiengesellschaft | Process for the preparation of very pure magnesium oxide |
| CN1618998A (en) * | 2003-11-20 | 2005-05-25 | 中南大学 | Method for preparing high-purity magnesite by taking bischofite in salt lake as raw material |
| CN101607720A (en) * | 2008-06-16 | 2009-12-23 | 中国科学院过程工程研究所 | With the bittern that contains magnesium chloride is the feedstock production method of magnesium oxide |
| CN101712481A (en) * | 2009-12-08 | 2010-05-26 | 耿世达 | Method for preparing high-purity lithium carbonate and other available byproducts from salt lake brine |
| CN101746784A (en) * | 2009-12-11 | 2010-06-23 | 河北科技大学 | Technology for producing active magnesium oxide |
| CN102060313A (en) * | 2010-11-26 | 2011-05-18 | 南风化工集团股份有限公司 | Novel process for producing high-purify magnesium oxide from salt lake brine |
-
2014
- 2014-11-27 CN CN201410704667.XA patent/CN104402025B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182931B1 (en) * | 1984-11-27 | 1990-02-28 | GebràDer Sulzer Aktiengesellschaft | Process for the preparation of very pure magnesium oxide |
| CN1618998A (en) * | 2003-11-20 | 2005-05-25 | 中南大学 | Method for preparing high-purity magnesite by taking bischofite in salt lake as raw material |
| CN101607720A (en) * | 2008-06-16 | 2009-12-23 | 中国科学院过程工程研究所 | With the bittern that contains magnesium chloride is the feedstock production method of magnesium oxide |
| CN101712481A (en) * | 2009-12-08 | 2010-05-26 | 耿世达 | Method for preparing high-purity lithium carbonate and other available byproducts from salt lake brine |
| CN101746784A (en) * | 2009-12-11 | 2010-06-23 | 河北科技大学 | Technology for producing active magnesium oxide |
| CN102060313A (en) * | 2010-11-26 | 2011-05-18 | 南风化工集团股份有限公司 | Novel process for producing high-purify magnesium oxide from salt lake brine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104402025A (en) | 2015-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101538057B (en) | Method for separating magnesium from lithium and extracting lithium from brine | |
| CN100469697C (en) | Method for producing low-magnesium battery-stage lithium carbonate from lithium sulfate solution | |
| CN104649286B (en) | A kind of method that kodalk and sodium perborate are produced from boron concentrate | |
| CN105039699B (en) | The solid fluorine reconstruct extraction alkali metal Slag treatment of lepidolite and resource utilization method | |
| WO2008119212A1 (en) | A method of extracting silica at first and then extracting alumina from fly ash | |
| CN102476820B (en) | Method for extracting alumina from coal ash through wet process | |
| WO2013040862A1 (en) | Method for producing aluminium oxide by processing fly ash with ammonia process | |
| CN115216645B (en) | Method for extracting lithium from electrolytic aluminum waste residue by mixed salt calcination | |
| CN106517256A (en) | Method for producing lithium hydroxide monohydrate from lithium carbonate | |
| CN102897810B (en) | Method for producing aluminum oxide by using fly ash | |
| CN110791664A (en) | Method for extracting lithium from lepidolite, lithium-containing mother liquor and filler | |
| CN102925718B (en) | Composite sodium salt for producing sodium stannate from cassiterite concentrate and application of composite sodium salt | |
| CN108584994A (en) | A kind of method of lepidolite calcined by rotary kiln lithium carbonate | |
| CN110510642A (en) | A kind of method that low-grade α spodumene economy mentions lithium | |
| CN104278151A (en) | High-concentration-alkali-leaching comprehensive utilization process for laterite-nickel ore | |
| CN104445298B (en) | A kind ofly utilize the rough method preparing high-purity magnesium oxide of magnesiumcarbonate | |
| CN108101077A (en) | Integrated process for extracting lithium by utilizing spodumene and synthesizing mineral fertilizer | |
| CN108677006B (en) | Method for extracting rubidium chloride from kaolin tailings | |
| CN103031443A (en) | Method of dealkalizing red mud and recovering aluminum and iron | |
| CN105217644B (en) | A kind of method that magnesium-based hydrotalcite coproduction boric acid is prepared using salt lake brine with high magnesium-lithium ratio | |
| CN104773744A (en) | Method for preparing high purity magnesium oxide from old brine | |
| CN103663516B (en) | A kind of method utilizing aluminous fly-ash to prepare aluminium hydroxide | |
| CN102616867B (en) | Method for extracting and preparing nickel carbonate, nickel sulfate and red ferric oxide from serpentine and tailings thereof | |
| CN103937976A (en) | Method used for preparing dissoluble potassium via decomposition desilication of potash feldspar | |
| CN1307104C (en) | Magnesium sulfate hypotype salt lake brine magnesium lithium separation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |