CN107188209A - The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide - Google Patents
The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide Download PDFInfo
- Publication number
- CN107188209A CN107188209A CN201710488114.9A CN201710488114A CN107188209A CN 107188209 A CN107188209 A CN 107188209A CN 201710488114 A CN201710488114 A CN 201710488114A CN 107188209 A CN107188209 A CN 107188209A
- Authority
- CN
- China
- Prior art keywords
- aluminum oxide
- andradite
- alkali
- carbon
- grade aluminum
- 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.)
- Pending
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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to the method that a kind of hot method of step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide, comprise the steps, S1：By middle-low bauxite pulverizing and jevigating into miberal powder；S2：Miberal powder, sodium ferrite or calcium ferrite, active lime and circulating mother liquor are prepared by mixing into raw material ore pulp；S3：Raw material ore pulp is subjected to alkali thermosol and goes out reaction；S4：Dissolved mineral slurry is diluted and dilution is subjected to solid-liquor separation；S5：Carbon dioxide is passed through into lower molecular ratio sodium aluminate solution and carries out carbon point, thick aluminium hydroxide and carbon mother liquid is obtained；S6：Thick aluminium hydroxide is subjected to Bayer process processing, metallurgical-grade aluminum oxide is obtained.The method of the present invention, by adding lime and sodium ferrite or calcium ferrite in process in leaching, process in leaching is set to generate andradite type slag to replace traditional dissolution slag, the dissolution rate of aluminum oxide can be increased substantially, prepare metallurgical-grade aluminum oxide simultaneously, the characteristics of efficiency high short with flow, material realizes zero-emission.
Description
Technical field
The invention belongs to the technical field of alumina producing, and in particular to low in a kind of hot method processing of the step alkali of andradite one
The method of grade alumyte production metallurgy grade aluminum oxide.
Background technology
China's bauxite resource is compared with horn of plenty, but most is middle-low bauxite, and with high alumina, high silicon is low
The features such as alumina silica ratio (A/S), in addition, China also has some to contain bauxite resource, such as flyash etc..With the reduction of the grade of ore,
Each process for making alumina cost is gradually increasing, and wherein bayer process amplification is maximum.According to the basic technology of Bayer process
And principle, when bauxite A/S drops to below 5, it will be difficult to handled again with Bayer process.Low-grade bauxite is directed to, in recent years
Carry out aluminum oxide industry circle and mainly use following several method.
Middle-low bauxite processing method mainly has reinforcing Bayer process, sintering process, Bayer-sintering combination method etc..Reinforcing
Bayer process is improved on the basis of Bayer process to adapt to the method for handling middle-low bauxite, mainly includes ore dressing Bayer
Method and lime bayer method.Wherein, Liquor of Ore Dressing Bayer process handles middle-low bauxite using selecting smelting combination, and flow is relatively easy, but
There are problems that physical upgrading difficulty is big, raw ore consumption is big, alumina recovery rate is low, floating agent influence Bayer process,
Ore dressing process produces mine tailing of a large amount of alumina silica ratios less than 2 and can not utilized simultaneously, causes the significant wastage of resource；Lime bayer method is
By excessive addition lime to reach the effects such as reduction alkaline consumption on the basis of Bayer process, but lime-crushed stone pile causes aluminum oxide molten greatly
The problems such as extracting rate is greatly reduced, red mud discharge rate increases, red-mud settlement load increases.Sintering process mainly includes soda lime sintering process
And lime sinter process, but high energy consumption, production cost height are the main short slabs of its development.Soda lime sintering process belong to wet laid furnishes,
Wet method is sintered, and production total energy consumption, and sintered clinker has been significantly greatly increased in 40% or so moisture evaporation in sintering process raw slurry
Middle 2CaOSiO2Stability is relatively low, and secondary response is serious；Lime sinter process has that lime is high, waste amount is big, clinker oxygen
Change the low problem of aluminium leaching rate.Bayer-sintering combination method includes series process, multiple process and mixed combining method, can handle middle-low grade
Bauxite, but there are problems that flow it is complicated, replaced substantially by Bayer process at present.Other such as acid system and soda acids
The techniques such as combination method predominantly stay in the laboratory research stage at present, there is alumina product is of poor quality, equipment corrosion is serious etc.
Problems.
Make a general survey of the method that the above handles middle-low bauxite, sintering process and Bayer-sintering combination method due to its energy consumption and
Cost Problems are abandoned substantially, lime bayer method be particular historical period to solve the problems, such as that alkaline consumption is researched and developed, at present only
Liquor of Ore Dressing Bayer process is applied in indivedual enterprises.However, by industrial practice in recent years, the problem of Liquor of Ore Dressing Bayer process exposed day by day goes out
The normal operation of production process has seriously been hindered, has continued the bottleneck of Popularization And Development as it.Therefore, rely on China exclusive
Middle-low grade diaspore type bauxite, the new method of exploitation high-efficiency and economic processing is imperative.
The content of the invention
(1) technical problem to be solved
In order to solve the above problems, it is an object of the invention to provide low product in a kind of hot method processing of step alkali of andradite one
The method of position bauxite production metallurgy grade aluminum oxide, adds sodium ferrite (calcium ferrite) and active lime in high temperature process in leaching
Method, aluminium enters solution with aluminic acid na form in high temperature process in leaching, and silicon in the form of andradite to stay in dissolution slag.
The method of the present invention can increase substantially the dissolution rate of metallurgical-grade aluminum oxide, while making to be practically free of alkali in dissolution slag, have
Material realizes zero-emission in the characteristics of flow short efficiency high, whole flow process.
(2) technical scheme
In order to achieve the above object, the main technical schemes that the present invention is used include：
A kind of method that hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide, including under
State step,
S1：By middle-low bauxite pulverizing and jevigating into miberal powder；
S2：Miberal powder, sodium ferrite or calcium ferrite, active lime and circulating mother liquor are prepared by mixing into raw material ore pulp；
S3：Raw material ore pulp is subjected to alkali thermosol and goes out reaction, reaction obtains dissolved mineral slurry after terminating；
S4：Dissolved mineral slurry is diluted and obtains dilution, dilution is subjected to solid-liquor separation, dissolution slag and dissolution is obtained
Liquid, wherein dissolution fluid are sodium aluminate solution；
S5：Carbon dioxide is passed through into the sodium aluminate solution and carries out carbon point, thick aluminium hydroxide and carbon denominator is obtained
Liquid；
S6：The thick aluminium hydroxide is subjected to Bayer process processing, metallurgical-grade aluminum oxide is obtained；
S7：The carbon mother liquid obtained in step S5 is subjected to causticization using calcium oxide, causticization slurry is obtained, by causticization slurry
Solid-liquor separation is carried out, high molecule ratio sodium aluminate solution and calcium carbonate is obtained, high molecule ratio sodium aluminate solution is modulated, as
Circulating mother liquor in step S2.
Preferably, the silica alumina ratio of the middle-low bauxite is 2~6.
Preferably, in the raw material ore pulp that bauxite, sodium ferrite or calcium ferrite, active lime are constituted, what each form was present
Iron, aluminium, calcium, silicon total amount are respectively in terms of oxide, and batch formula is as follows：：
The mass ratio of the total amount of iron oxide and the total amount of aluminum oxide is 0.2~0.6：1；
The mol ratio of the total amount of calcium oxide and the total amount of iron oxide is 3~6：1.
Preferably, in step S1, the liquid-solid ratio of raw material ore pulp is 2~5：1.
Preferably, the severe alkali concn in step S2 in circulating mother liquor is 150~250g/L, and molecular proportion is 5~25.
Preferably, the temperature that dissolution is reacted in step S3 is 150~250 DEG C, and the reaction time is 0.5~2h.
Preferably, in step S5, to dissolution after be passed through carbon dioxide in obtained sodium aluminate and add crystal seed progress
Carbon point, obtains carrying out solid-liquor separation after thick aluminum hydroxide slime, obtains carbon mother liquid and thick aluminium hydroxide,
Carbon point temperature is 60~90 DEG C in step S5, carbon point terminal be resolution ratio more than 90%, crystal seed addition coefficient is 0
~1.0.
Preferably, methods described also includes：
Step S8：Dissolution slag in step S4 is carried out to wash and separation of solid and liquid, andradite type slag and cleaning solution is obtained；
Step S9：The cleaning solution is used to dilute the dissolved mineral slurry in step S4.
Preferably, methods described also includes step S10：The calcium carbonate obtained in step S7 is subjected to calcining and decomposing, obtained
Carbon dioxide and calcium oxide, obtained carbon dioxide, which is used for carbon office in step S5, to be managed, and obtained calcium oxide is used for
Causticization is handled in step S7.
Preferably, the sodium ferrite in step S1 is that iron-bearing material is formed with industrial carbon alkaline sintering；Calcium ferrite is iron-bearing material
Formed with lime sintering.
(3) beneficial effect
(1) compared with conventional Bayer process, the actual dissolution rate of metallurgical-grade aluminum oxide that method of the invention is produced is improved
More than 15%, the dissolution rate of aluminum oxide has been significantly increased；
(2) compared with conventional Bayer process, the dissolution slag alkali content that method of the invention is produced is several in slag below 0.5%
Be free of alkali；
(3) material realizes zero-emission in the characteristics of method of the invention has flow short efficiency high, whole flow process.
Brief description of the drawings
Fig. 1 is the method that the hot method of the step alkali of andradite one of the present invention handles middle-low bauxite production metallurgy grade aluminum oxide
Process chart.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate this hair
It is bright, rather than limitation the scope of the present invention.
Middle-low bauxite in the embodiment of the present invention, silica alumina ratio (hereinafter referred to as A/S) is 2~6.In bauxite, iron
In sour sodium (or calcium ferrite), the Raw Ore of active lime composition, below the mass ratio of the total amount of iron oxide and the total amount of aluminum oxide
It is abbreviated as F/A；The mol ratio of the total amount of calcium oxide and the total amount of iron oxide is to be abbreviated as C/F.Raw material pulp slurry stereoplasm amount ratio with
Under be abbreviated as L/S.
The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide, refers to dissolution slag
For andradite type slag, a hot method of step alkali refers to carry out aluminum oxide one step hydro-thermal dissolution processing using alkali lye (circulating mother liquor)
Method, the product of production is metallurgical-grade aluminum oxide.
Embodiment 1
The present embodiment uses middle-low bauxite, and main chemical compositions (mass percent, wt%) are：Aluminum oxide
(Al2O3) 60.60%, silica (SiO2) 17.5%, other is impurity, and its alumina silica ratio is 3.5；
Calcium ferrite is that iron-bearing material is formed with lime sintering；
Severe alkali concn in circulating mother liquor is 200g/L, and molecular proportion is 25；
F/A=0.5：1；
C/F=4.5：1.
According to the hot method processing middle-low bauxite production metallurgy level oxygen of the step alkali of andradite of the present invention one shown in this Fig. 1
Change the method for aluminium：
S1：By middle-low bauxite pulverizing and jevigating into miberal powder；
S2：After miberal powder, calcium ferrite, active lime are mixed, according to L/S=4:1 ratio is mixed with circulating mother liquor
Into raw material ore pulp；
S3：Raw material ore pulp is subjected to alkali thermosol and goes out reaction, dissolution reaction temperature is 250 DEG C, and the dissolution reaction time is 2h, instead
Dissolved mineral slurry is obtained after should terminating；
Dissolution reaction treatment by this step, the recovery rate of aluminum oxide can reach 83%；
S4：Dissolved mineral slurry is diluted and obtains dilution, dilution is subjected to solid-liquor separation, dissolution slag and dissolution is obtained
Liquid, wherein：Dissolution fluid is sodium aluminate solution；
S5：By sodium aluminate under conditions of 80 DEG C, crystal seed addition coefficient is 0.8, logical carbon dioxide simultaneously adds crystal seed progress
Carbon point (carbonation decomposition) to resolution ratio reaches 95%, obtains thick aluminum hydroxide slime, and carries out solid-liquor separation, obtains carbon denominator
Liquid and thick aluminium hydroxide；
S6：The thick aluminium hydroxide obtained in step S5 is subjected to Bayer process processing, metallurgical-grade aluminum oxide is obtained；
S7：The carbon mother liquid obtained in step S5 is subjected to causticization using milk of lime, causticization slurry is obtained, by causticization slurry
Solid-liquor separation is carried out, high molecule ratio sodium aluminate solution and calcium carbonate is obtained, high molecule ratio sodium aluminate solution is modulated, as
Circulating mother liquor in step S2；
In this step, carbon mother liquid is handled, can be as following after the adjustment of obtained high molecule ratio sodium aluminate solution
Ring mother liquor participates in other technological processes so that technological process is pollution-free without outer row；
S8：Dissolution slag in step S4 is carried out to wash and separation of solid and liquid, andradite type slag and cleaning solution is obtained；
In this step, alkali-free andradite type slag has been obtained by processing, has made silicon and the iron and calcium of addition with andradite
Form stay in dissolution slag, reduce the alkali content in slag；
S9：Cleaning solution is used to dilute the dissolved mineral slurry in step S4；
In this step, the cleaning solution of generation is waste liquid, but cleaning solution is returned to for diluting dissolved mineral slurry in step S4,
Both the processing and discharge of waste liquid had been reduced, the effect of recycling has been reached again, the recycling of material has been reached；
S10：The calcium carbonate obtained in step S7 is subjected to calcining and decomposing at 1000 DEG C, carbon dioxide and oxygen is obtained
Change calcium, obtained carbon dioxide, which is used for carbon office in step S5, to be managed, and obtained calcium oxide is used for causticization in step S7 and handled；
In this step, the decomposition of calcium carbonate is recycled, and realizes the recycling of resource, it is to avoid the waste of resource, section
About cost.
Obtained metallurgical-grade aluminum oxide as product.
Embodiment 2
The present embodiment uses middle-low bauxite, and main chemical compositions (mass percent, wt%) are：Aluminum oxide
(Al2O3) 65.22%, silica (SiO2) 12.66%, other is impurity, and its alumina silica ratio is 5.15；
Sodium ferrite is that iron-bearing material is formed with industrial carbon alkaline sintering；
Severe alkali concn in circulating mother liquor is 230g/L, and molecular proportion is 20.
F/A=0.6：1；
C/F=4：1.
According to the hot method processing middle-low bauxite production metallurgy level oxygen of the step alkali of andradite of the present invention one shown in this Fig. 1
Change the method for aluminium：
S1：By middle-low bauxite pulverizing and jevigating into miberal powder；
S2：After miberal powder, sodium ferrite, active lime are mixed, according to L/S=4:1 ratio is mixed with circulating mother liquor
Into raw material ore pulp；
S3：Raw material ore pulp is subjected to dissolution reaction in a kettle., dissolution reaction temperature is 250 DEG C, dissolution reaction time
For 1h, reaction obtains dissolved mineral slurry after terminating；
Dissolution reaction treatment by this step, the recovery rate of aluminum oxide can reach 83.7%；
S4：Dissolved mineral slurry is diluted and obtains dilution, dilution is subjected to solid-liquor separation, dissolution slag and dissolution is obtained
Liquid, wherein dissolution fluid are sodium aluminate solution；
S5：By lower molecular ratio sodium aluminate under conditions of 80 DEG C, crystal seed addition coefficient is 0.8, logical carbon dioxide is simultaneously added
Crystal seed carries out carbon point, and carbon point terminal is resolution ratio more than 95%.Carbon, which is got, carries out solid-liquor separation after thick aluminum hydroxide slime, obtain
To carbon mother liquid and thick aluminium hydroxide；
S6：The thick aluminium hydroxide obtained in step S5 is subjected to Bayer process processing, metallurgical-grade aluminum oxide is obtained；
S7：The carbon mother liquid obtained in step S5 is subjected to causticization using calcium oxide, causticization slurry is obtained, by causticization slurry
Solid-liquor separation is carried out, high molecule ratio sodium aluminate solution and calcium carbonate is obtained, high molecule ratio sodium aluminate solution is modulated, as
Circulating mother liquor in step S2；
In this step, carbon mother liquid is handled, can be as following after the adjustment of obtained high molecule ratio sodium aluminate solution
Ring mother liquor participates in other technological processes so that technological process is pollution-free without outer row；
S8：Dissolution slag in step S4 is carried out to wash and separation of solid and liquid, andradite type slag and cleaning solution is obtained；
In this step, alkali-free andradite type slag has been obtained by processing, has made silicon and the iron and calcium of addition with andradite
Form stay in dissolution slag, reduce the alkali content in slag；
S9：Cleaning solution is used to dilute the dissolved mineral slurry in step S4；
In this step, the cleaning solution of generation is waste liquid, but cleaning solution is returned to for diluting dissolved mineral slurry in step S4,
Both the processing and discharge of waste liquid had been reduced, the effect of recycling has been reached again, the recycling of material has been reached；
S10：The calcium carbonate obtained in step S7 is subjected to calcining and decomposing at 1000 DEG C, carbon dioxide and oxygen is obtained
Change calcium, obtained carbon dioxide, which is used for carbon office in step S5, to be managed, and obtained calcium oxide is used for causticization in step S7 and handled；
In this step, the decomposition of calcium carbonate is recycled, and realizes the recycling of resource, it is to avoid the waste of resource, section
About cost.
Obtained metallurgical-grade aluminum oxide as product.
The method of the present invention is the characteristics of have short flow, efficiency high, full-range final product be metallurgical-grade aluminum oxide and
Alkali-free andradite type slag, rest materials are realized and recycled, and material realizes zero-emission in whole flow process.This alkali-free
Andradite type slag has obtained effective utilization because of the reduction of alkali content, is such as used for the ferrous acid calcium additive of steelmaking process, certainly should do
The preferable aggregate of the strong concrete such as power, high intensity, rapid hardening portland cement and highway, airfield runway, and conduct
Potential raw material of the added values such as devitrified glass, siliceous fertilizer compared with high product.
Finally it should be noted that：Above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in previous embodiment, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or substitutions, the essence of appropriate technical solution is departed from various embodiments of the present invention technical side
The scope of case.
Claims (10)
1. a kind of method that hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide, its feature exists
In：Comprise the steps,
S1：By middle-low bauxite pulverizing and jevigating into miberal powder；
S2：Miberal powder, sodium ferrite or calcium ferrite, active lime and circulating mother liquor are prepared by mixing into raw material ore pulp；
S3：Raw material ore pulp is subjected to alkali thermosol and goes out reaction, reaction obtains dissolved mineral slurry after terminating；
S4：Dissolved mineral slurry is diluted and obtains dilution, dilution is subjected to solid-liquor separation, dissolution slag and dissolution fluid is obtained,
Wherein dissolution fluid is sodium aluminate solution；
S5：Carbon dioxide will be passed through in sodium aluminate solution and carries out carbon point, thick aluminium hydroxide and carbon mother liquid is obtained；
S6：The thick aluminium hydroxide is subjected to Bayer process processing, metallurgical-grade aluminum oxide is obtained；
S7：The carbon mother liquid obtained in step S5 is subjected to causticization using milk of lime, causticization slurry is obtained, causticization slurry is carried out
Solid-liquor separation, obtains sodium hydroxide solution and calcium carbonate, and sodium hydroxide solution is modulated, female as the circulation in step S2
Liquid.
2. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：The silica alumina ratio of the middle-low bauxite is 2~6.
3. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：In bauxite, sodium ferrite or calcium ferrite, the raw material ore pulp of active lime composition, what each form was present
Iron, aluminium, calcium, silicon total amount are respectively in terms of oxide, and batch formula is as follows：
The mass ratio of the total amount of iron oxide and the total amount of aluminum oxide is 0.2~0.6：1；
The mol ratio of the total amount of calcium oxide and the total amount of iron oxide is 3~6：1.
4. the hot method processing middle-low bauxite production metallurgy level oxygen of the step alkali of andradite one according to claim 1 or 2
Change the method for aluminium, it is characterised in that：In step S1, the liquid-solid ratio of raw material ore pulp is 2~5：1.
5. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：Severe alkali concn in step S2 in circulating mother liquor is 150~250g/L, and molecular proportion is 5~25.
6. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：The temperature that dissolution is reacted in step S3 is 150~250 DEG C, and the reaction time is 0.5~2h.
7. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：
In step S5, carbon dioxide is passed through into lower molecular ratio sodium aluminate and crystal seed progress carbon point is added, thick hydrogen-oxygen is obtained
Solid-liquor separation is carried out after changing aluminium slurry, carbon mother liquid and thick aluminium hydroxide is obtained,
Carbon point temperature is 60~90 DEG C in step S5, carbon point terminal be resolution ratio more than 90%, crystal seed addition coefficient is 0~
1.0。
8. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：Methods described also includes：
Step S8：Dissolution slag in step S4 is carried out to wash and separation of solid and liquid, andradite type slag and cleaning solution is obtained；
Step S9：The cleaning solution is used to dilute the dissolved mineral slurry in step S4.
9. the hot method processing middle-low bauxite production metallurgy grade aluminum oxide of the step alkali of andradite one according to claim 1
Method, it is characterised in that：Methods described also includes step S10：The calcium carbonate obtained in step S7 is subjected to calcining and decomposing, obtained
To carbon dioxide and calcium oxide, obtained carbon dioxide, which is used for carbon office in step S5, to be managed, and obtained calcium oxide is used
The causticization carbon mother liquid in step S7.
10. the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide according to claim 1
Method, it is characterised in that：Sodium ferrite in step S1 is that iron-bearing material is formed with industrial carbon alkaline sintering；Calcium ferrite is that iron content is former
Material is formed with lime sintering.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488114.9A CN107188209A (en) | 2017-06-23 | 2017-06-23 | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide |
| PCT/CN2018/092422 WO2018233686A1 (en) | 2017-06-23 | 2018-06-22 | Method for preparing metallurgical-level aluminum oxide by treating medium- and low-grade bauxite by using one-step alkali heat process of andradite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488114.9A CN107188209A (en) | 2017-06-23 | 2017-06-23 | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107188209A true CN107188209A (en) | 2017-09-22 |
Family
ID=59878712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710488114.9A Pending CN107188209A (en) | 2017-06-23 | 2017-06-23 | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107188209A (en) |
| WO (1) | WO2018233686A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857285A (en) * | 2017-12-01 | 2018-03-30 | 东北大学设计研究院（有限公司） | A kind of method that aluminic acid sodium crystal is produced using low-grade aluminum-containing raw material |
| WO2018233686A1 (en) * | 2017-06-23 | 2018-12-27 | 东北大学 | Method for preparing metallurgical-level aluminum oxide by treating medium- and low-grade bauxite by using one-step alkali heat process of andradite |
| CN110436492A (en) * | 2019-08-19 | 2019-11-12 | 河北科技大学 | A method of comprehensively utilizing low-grade bauxite resource |
| CN111039299A (en) * | 2019-12-13 | 2020-04-21 | 潘爱芳 | Method for efficiently recycling lead-zinc tailings |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442362A (en) * | 2003-04-18 | 2003-09-17 | 中国铝业股份有限公司 | Bayer process stripping additive and its preparation and using method |
| CN1888096A (en) * | 2006-07-18 | 2007-01-03 | 中国铝业股份有限公司 | Prepn process of Bayer process leaching additive |
| CN101054626A (en) * | 2007-05-31 | 2007-10-17 | 中国铝业股份有限公司 | Stripping method for diasporite type bauxite |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1231638A (en) * | 1957-01-15 | 1960-09-30 | Pechiney | Aluminum ore processing process |
| CN101117230A (en) * | 2007-07-12 | 2008-02-06 | 中国铝业股份有限公司 | Bayer process dissolving-out method |
| CN104445310A (en) * | 2013-09-25 | 2015-03-25 | 贵阳铝镁设计研究院有限公司 | Novel process for treating middle-low bauxite in complete wet method alkali system |
| CN107188209A (en) * | 2017-06-23 | 2017-09-22 | 东北大学 | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide |
-
2017
- 2017-06-23 CN CN201710488114.9A patent/CN107188209A/en active Pending
-
2018
- 2018-06-22 WO PCT/CN2018/092422 patent/WO2018233686A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442362A (en) * | 2003-04-18 | 2003-09-17 | 中国铝业股份有限公司 | Bayer process stripping additive and its preparation and using method |
| CN1888096A (en) * | 2006-07-18 | 2007-01-03 | 中国铝业股份有限公司 | Prepn process of Bayer process leaching additive |
| CN101054626A (en) * | 2007-05-31 | 2007-10-17 | 中国铝业股份有限公司 | Stripping method for diasporite type bauxite |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018233686A1 (en) * | 2017-06-23 | 2018-12-27 | 东北大学 | Method for preparing metallurgical-level aluminum oxide by treating medium- and low-grade bauxite by using one-step alkali heat process of andradite |
| CN107857285A (en) * | 2017-12-01 | 2018-03-30 | 东北大学设计研究院（有限公司） | A kind of method that aluminic acid sodium crystal is produced using low-grade aluminum-containing raw material |
| CN110436492A (en) * | 2019-08-19 | 2019-11-12 | 河北科技大学 | A method of comprehensively utilizing low-grade bauxite resource |
| CN111039299A (en) * | 2019-12-13 | 2020-04-21 | 潘爱芳 | Method for efficiently recycling lead-zinc tailings |
| CN111039299B (en) * | 2019-12-13 | 2020-10-30 | 潘爱芳 | Method for efficiently recycling lead-zinc tailings |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018233686A1 (en) | 2018-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107337222A (en) | The method of the hot method processing middle-low bauxite production aluminium hydroxide of the step alkali of andradite one | |
| WO2019141098A1 (en) | High-value comprehensive utilization method for lithium slag | |
| CN107298452A (en) | The method that the hot method of the step alkali of andradite one handles Bayer process red mud production metallurgy grade aluminum oxide | |
| CN101306826B (en) | Process for extracting metallurgy-level aluminum oxide from fly ash or slag | |
| CN109516484B (en) | Method for producing alumina by sintering carbide slurry fly ash and coal gangue | |
| CN101306426B (en) | Method for extracting iron washed ore from fly ash or slag | |
| CN107352564A (en) | The method of the hot method processing middle-low bauxite production sodium aluminate of the step alkali of andradite one | |
| CN109290060A (en) | A kind of process for subsequent treatment and phosphate ore floatation method of phosphate ore flotation tailings | |
| CN107188209A (en) | The method that the hot method of the step alkali of andradite one handles middle-low bauxite production metallurgy grade aluminum oxide | |
| CN101306926B (en) | Process for abstracting floating air ball from fly ash or slag | |
| US20170036920A1 (en) | A method for recovering alkali and aluminum in course of treatment of bayer red mud by using calcification-carbonation method | |
| CN107244683A (en) | The method that the hot method processing Bayer process red mud of the step alkali of andradite one produces sodium aluminate | |
| CN110127725B (en) | Dealkalization method of Bayer process red mud | |
| CN108821686A (en) | A kind of preparation method and product of aluminium calcium carbonate composite gelled material | |
| CN104291539B (en) | One utilizes CO2method with spent acid Combined Treatment Bayer process red mud dealkalize | |
| CN105154979B (en) | A kind of method for producing phosphoric acid by wet process by-product αsemiwatergypsum whisker and the high whiteness αsemiwatergypsum whisker of high-purity | |
| CN101306819B (en) | Process for abstracting white carbon black from fly ash or slag | |
| CN103288091A (en) | Method for preparing white carbon black by utilizing water glass with low modulus through carbonizing method of precipitation | |
| CN109734105A (en) | A kind of method that titanium gypsum conversion and cycle metal self enrichment and whole amount utilize | |
| CN108863245A (en) | A kind of lithium dreg concrete | |
| CN109179476B (en) | Method for controlling water content of titanium gypsum | |
| CN112159128A (en) | Low-energy-consumption cement clinker and preparation method thereof | |
| CN101543830B (en) | Comprehensive utilization method for recycling manganese oxide slag | |
| CN102838299A (en) | Method for producing cement by electrolytic manganese residue and red mud | |
| CN103408050B (en) | Method of efficient extraction of aluminum, iron, and titanium in coal gangue |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170922 |