CN112456524A - Method for treating fine seeds by using horizontal tilting disk filter - Google Patents
Method for treating fine seeds by using horizontal tilting disk filter Download PDFInfo
- Publication number
- CN112456524A CN112456524A CN202011456639.2A CN202011456639A CN112456524A CN 112456524 A CN112456524 A CN 112456524A CN 202011456639 A CN202011456639 A CN 202011456639A CN 112456524 A CN112456524 A CN 112456524A
- Authority
- CN
- China
- Prior art keywords
- filter
- washing
- fine
- seeds
- fine seeds
- 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
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 59
- 239000012065 filter cake Substances 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 21
- 239000012452 mother liquor Substances 0.000 claims description 14
- 239000000706 filtrate Substances 0.000 claims description 11
- 210000000582 semen Anatomy 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 238000005054 agglomeration Methods 0.000 claims description 6
- 230000002776 aggregation Effects 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- QXDMQSPYEZFLGF-UHFFFAOYSA-L calcium oxalate Chemical compound [Ca+2].[O-]C(=O)C([O-])=O QXDMQSPYEZFLGF-UHFFFAOYSA-L 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000008267 milk Substances 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010419 fine particle Substances 0.000 abstract description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical class [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Images
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
-
- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pretreatment Of Seeds And Plants (AREA)
Abstract
The invention belongs to the field of aluminum oxide production, and particularly relates to a method for treating fine seeds by using a horizontal tilting disk filter. The technical scheme of the invention is as follows: a method of processing fine seeds using a horizontal, tumble filter comprising the steps of: step one, separation; step two, washing for one time; step three, washing for the second time; turning the fine seeds to a filter cake groove through a turning disc, and washing the fine seeds with the fine liquid. The method for processing fine seeds by using the horizontal tilting disk filter can realize the functions of fine seed separation, primary washing and secondary washing on a single device, and better process fine particle slurry.
Description
Technical Field
The invention belongs to the field of aluminum oxide production, and particularly relates to a method for treating fine seeds by using a horizontal tilting disk filter.
Background
The seed decomposition is one of the important processes in the production process of alumina by Bayer process, and the process aims to separate out aluminum in supersaturated sodium aluminate solution in the form of aluminum hydroxide crystals, obtain aluminum hydroxide products with high yield and meeting quality requirements, and obtain seed precipitation mother liquor with high caustic ratio at the same time, so as to return the seed precipitation mother liquor for dissolving out the next batch of bauxite. In order to produce the sandy alumina, the seed decomposition procedure adopts a two-stage decomposition process flow, namely a process of one-stage fine seed agglomeration and two-stage seed crystal growth is adopted, and in order to realize a better agglomeration effect and improve the strength of the seed crystal, the one-stage agglomeration section is added with the finer seed crystal. The fine crystal seeds are obtained by the aluminum hydroxide in the seed tank through cyclone classification, filter separation and washing, because the crystal seeds have small granularity, common filtering equipment such as a vertical disc filter is not ideal in filtering effect, the unit area processing capacity is low, the requirement on solid content of feeding is high, if the filter cake cannot reach a certain thickness, the filter cake is difficult to unload, and a plurality of vertical disc filters are needed for separating and washing the fine crystal seeds.
Disclosure of Invention
The invention provides a method for processing fine seeds by using a horizontal tilting disk filter, which can realize the functions of fine seed separation, primary washing and secondary washing on a single device and better process fine particle slurry.
The technical scheme of the invention is as follows:
a method of processing fine seeds using a horizontal, tumble filter comprising the steps of: step one, fine seed slurry overflowing from a cyclone enters a separation section of a horizontal tilting disk type filter, vacuum pumping is carried out through a vacuum pump, and most of mother liquor carried by the fine seed slurry is filtered to a mother liquor tank; step two, the separated fine seeds enter a primary washing section of the horizontal tilting disk type filter, alkali liquor carried by the fine seeds is washed away by cold water from a cold water tank, filtrate of primary washing is filtered to a mother liquor tank, and mother liquor in the mother liquor tank is subjected to a fine liquor cooling process for heat exchange;
step three, the fine seeds after the primary washing enter a secondary washing section of the horizontal tilting disk type filter, and oxalate carried by the fine seeds is washed away by hot water from a hot water tank;
and step four, after secondary washing, blowing off the fine seeds by using compressed air, turning over the fine seeds to a filter cake tank through a turning disc, washing the filter cloth by using the refined liquid, completely discharging the residual filter cake, simultaneously feeding the refined liquid and the filter cake into the filter cake tank for mixing, and conveying the mixture to a first-stage decomposition first tank for agglomeration reaction.
Further, the method for processing fine seeds by using the horizontal tilting disk filter comprises the step oneThe solid content of the fine seed feed overflowed from the cyclone is 150-250g/l, the water content of the filter cake after separation is 20-35 percent, the content of suspended matters in the filtrate is 1-5g/l, and the processing capacity of the horizontal tilting disk filter is 0.3-0.8t/m2。
Further, in the method for processing fine seeds by using the horizontal tilting disk filter, in the second step, the amount of cold water for washing is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of cold water is 15-35 ℃, the water content of filter cakes after one-time washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of a horizontal tilting pan filter is 0.6-1.2t/m2。
Further, according to the method for treating the fine seeds by using the horizontal tilting disk type filter, lime milk is added into secondary washing liquid, soluble oxalate is converted into insoluble calcium oxalate, and the oxalate in the washing liquid is removed.
Further, the method for processing the fine seeds by using the horizontal tilting disk filter comprises the third step that the hot water used for washing is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of hot water is 85-95 ℃, the water content of filter cakes after secondary washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of the horizontal tilting pan filter is 0.6-1.2t/m2。
Further, in the method for treating fine seeds by using the horizontal tilting disk filter, in the fourth step, the amount of the semen for washing the filter cloth is 30% -55% of the total amount of the semen for decomposing the seeds, and the semen is sent to the first section of decomposition tank together with the filter cake after the filter cloth is washed.
The invention has the beneficial effects that:
1. the tilting disk filter operates in a vacuum environment by vacuumizing through the vacuum pump, so that pollution can be prevented.
2. The cold water from the cold water tank washes off the alkali liquor carried by the fine seeds, and the alkali liquor is easy to causticize after being washed off. Oxalate is not easy to dissolve in cold water environment, which can ensure that oxalate carried in the fine seeds is not washed away, and creates conditions for washing away oxalate for the second time. The filter cake on the filter cake of the tilting pan filter is thinner, so that the alkali liquor can be fully washed away.
2. The hot water from the hot water tank washes off oxalate carried by the fine seeds, and the alkali liquor carried by most of the fine seeds is washed off by the first washing, so that the oxalate concentration in the second washing is high, the alkali concentration is low, the environment is favorable for causticization reaction of oxalate in the washing liquor, and the lime milk is added into the second washing liquor to convert soluble oxalate into insoluble calcium oxalate, so that the oxalate in the washing liquor is removed. Because the filter cake on the filter cake of the tilting pan filter is thinner, the oxalate can be ensured to be fully washed away. The compressed air can further sweep and air-dry the filter cake after the secondary washing, guarantee the lower moisture content of filter cake, reduce the oxalate content that the filter cake smugglied secretly.
4. The filter cloth is flushed by the semen, the fine seeds with high viscosity can be washed off, the filter cake can be completely unloaded, the cleanliness of the filter cloth can be kept, and the filtering effect and the service time of the filter cake are improved.
5. The horizontal tilting disk type filter is used for separating and washing fine seeds, the separation and washing processes are simple compared with the separation and washing processes of fine seeds realized by using a vertical disk filter, the function which can be realized by a plurality of vertical disk filters can be realized by a single device, a plurality of filter cake retention grooves, a vacuum pump, a Roots blower and a gas-liquid separator can be omitted, the equipment investment is greatly reduced, the process flow is simplified, and the occupied area of a factory building is greatly saved.
Drawings
FIG. 1 is a block diagram of a process flow for treating fine seed using a horizontal, tumble filter.
Detailed Description
As shown in fig. 1, a method for processing fine seeds using a horizontal tilting disk type filter, comprising the steps of:
step one, the fine seed slurry overflowed from the cyclone enters a separation section of the horizontal tilting disk type filter, and most of mother liquor carried by the fine seed slurry is filtered to a mother liquor tank. The solid content of the fine seed feed overflowed from the cyclone is 150-250g/l, the water content of the filter cake after separation is 20-35 percent, the content of suspended matters in the filtrate is 1-5g/l, and the processing capacity of the tilting pan filter is 0.3-0.8t/m2。
Step two, the separated filter cake enters a primary washing section, the alkali liquor carried by the fine seeds is washed away by cold water from a cold water tank, the alkali liquor is easy to causticize by secondary washing liquor after being washed away, and the amount of the cold water for washing is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of cold water is 15-35 ℃, the water content of filter cakes after one-time washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of the tilting pan filter is 0.6-1.2t/m2。
Step three, the fine seeds after the primary washing enter a secondary washing section, the oxalate carried by the fine seeds is washed away by hot water from a hot water tank, the concentration of the oxalate in washing liquor of the secondary washing is high, the concentration of alkali is low, the environment is favorable for the causticization reaction of the oxalate in the washing liquor, the soluble oxalate is converted into insoluble calcium oxalate by adding lime milk into the secondary washing liquor, the removal of the oxalate in the washing liquor is realized, and the amount of the hot water for washing is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of hot water is 85-95 ℃, the water content of filter cakes after secondary washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of the tilting pan filter is 0.6-1.2t/m2。
And step four, further purging and air-drying the filter cake after secondary washing by compressed air, and ensuring the lower water content of the filter cake. The fine seeds are turned to a filter cake tank through a turning disc after being washed for the second time, the fine seeds are high in viscosity, the filter cloth needs to be washed by semen, the residual filter cake is completely discharged, the semen and the filter cake simultaneously enter the filter cake tank to be mixed and are sent to a first section of decomposition tank for agglomeration reaction, and the amount of the semen used for washing the filter cloth is 30% -55% of the total amount of the semen decomposed by the seeds.
Claims (6)
1. A method of processing fine seeds using a horizontal tilting disk filter comprising the steps of:
step one, fine seed slurry overflowing from a cyclone enters a separation section of a horizontal tilting disk type filter, vacuum pumping is carried out through a vacuum pump, and most of mother liquor carried by the fine seed slurry is filtered to a mother liquor tank;
step two, the separated fine seeds enter a primary washing section of the horizontal tilting disk type filter, alkali liquor carried by the fine seeds is washed away by cold water from a cold water tank, filtrate of primary washing is filtered to a mother liquor tank, and mother liquor in the mother liquor tank is subjected to a fine liquor cooling process for heat exchange;
step three, the fine seeds after the primary washing enter a secondary washing section of the horizontal tilting disk type filter, and oxalate carried by the fine seeds is washed away by hot water from a hot water tank;
and step four, after secondary washing, blowing off the fine seeds by using compressed air, turning over the fine seeds to a filter cake tank through a turning disc, washing the filter cloth by using the refined liquid, completely discharging the residual filter cake, simultaneously feeding the refined liquid and the filter cake into the filter cake tank for mixing, and conveying the mixture to a first-stage decomposition first tank for agglomeration reaction.
2. The method as claimed in claim 1, wherein the fine seeds are treated by the horizontal tilting pan filter, in the step one, the solid content of the fine seeds overflowed from the cyclone is 150-250g/l, the water content of the separated filter cake is 20-35%, the content of suspended matters in the filtrate is 1-5g/l, and the treatment capacity of the horizontal tilting pan filter is 0.3-0.8t/m2。
3. The method for processing fine seeds of claim 1, wherein the amount of cold water used for washing in the second step is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of cold water is 15-35 ℃, the water content of filter cakes after one-time washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of a horizontal tilting pan filter is 0.6-1.2t/m2。
4. The method of claim 1, wherein the removal of oxalate from the wash is accomplished by adding lime milk to the secondary wash to convert soluble oxalate to insoluble calcium oxalate.
5. The process of claim 1 using a horizontal tilting pan filterThe method for fine seeds is characterized in that in the third step, the amount of hot water for washing is 0.3-0.8t/t-Al2O3(fine seeds), the temperature of hot water is 85-95 ℃, the water content of filter cakes after secondary washing is 18-30 percent, the content of suspended matters in filtrate is 1-5g/l, and the processing capacity of the horizontal tilting pan filter is 0.6-1.2t/m2。
6. The method for processing fine seeds using a horizontal tilting disk filter according to claim 1, wherein in the fourth step, the amount of the semen used for washing the filter cloth is 30% -55% of the total amount of the semen used for decomposing the seeds, and the semen is sent to the first stage of decomposition tank together with the filter cake after washing the filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011456639.2A CN112456524A (en) | 2020-12-10 | 2020-12-10 | Method for treating fine seeds by using horizontal tilting disk filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011456639.2A CN112456524A (en) | 2020-12-10 | 2020-12-10 | Method for treating fine seeds by using horizontal tilting disk filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112456524A true CN112456524A (en) | 2021-03-09 |
Family
ID=74800759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011456639.2A Pending CN112456524A (en) | 2020-12-10 | 2020-12-10 | Method for treating fine seeds by using horizontal tilting disk filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112456524A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943233A (en) * | 1974-02-20 | 1976-03-09 | Engelhard Minerals & Chemicals Corporation | Processing finely divided solids on a continuous vacuum belt filter |
| US4675107A (en) * | 1985-07-12 | 1987-06-23 | Freeport Minerals Company | Tilting pan filters |
| CN1417124A (en) * | 2001-11-10 | 2003-05-14 | 中国长城铝业公司 | Red clay separating method for producing alumina by sintering process |
| CN1730398A (en) * | 2005-07-18 | 2006-02-08 | 贵阳铝镁设计研究院 | Method for producing powder form aluminum oxide by low concentration solution seed decomposition |
| CN101054191A (en) * | 2007-05-31 | 2007-10-17 | 中国铝业股份有限公司 | Method of reclaiming and processing seston in sodium aluminate solution |
| CN101575111A (en) * | 2008-05-08 | 2009-11-11 | 沈阳铝镁设计研究院 | System and method for removing oxalate in sodium aluminate solution |
| CN102092752A (en) * | 2009-12-15 | 2011-06-15 | 沈阳铝镁设计研究院有限公司 | Technology for removing oxalate in Bayer process |
| CN105197970A (en) * | 2014-06-27 | 2015-12-30 | 沈阳铝镁设计研究院有限公司 | Method for improving two-stage decomposition effect |
| CN105399122A (en) * | 2015-12-18 | 2016-03-16 | 东北大学设计研究院（有限公司） | First-tank temperature controlling and discharging grading method for producing sandy aluminium oxide through two-segment decomposition |
| CN105480994A (en) * | 2014-09-18 | 2016-04-13 | 沈阳铝镁设计研究院有限公司 | Efficient method for enriching oxalate through washing of fine seeds |
| CN106315646A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Bayer process red mud washing method and system thereof in production process of aluminum oxide |
-
2020
- 2020-12-10 CN CN202011456639.2A patent/CN112456524A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943233A (en) * | 1974-02-20 | 1976-03-09 | Engelhard Minerals & Chemicals Corporation | Processing finely divided solids on a continuous vacuum belt filter |
| US4675107A (en) * | 1985-07-12 | 1987-06-23 | Freeport Minerals Company | Tilting pan filters |
| CN1417124A (en) * | 2001-11-10 | 2003-05-14 | 中国长城铝业公司 | Red clay separating method for producing alumina by sintering process |
| CN1730398A (en) * | 2005-07-18 | 2006-02-08 | 贵阳铝镁设计研究院 | Method for producing powder form aluminum oxide by low concentration solution seed decomposition |
| CN101054191A (en) * | 2007-05-31 | 2007-10-17 | 中国铝业股份有限公司 | Method of reclaiming and processing seston in sodium aluminate solution |
| CN101575111A (en) * | 2008-05-08 | 2009-11-11 | 沈阳铝镁设计研究院 | System and method for removing oxalate in sodium aluminate solution |
| CN102092752A (en) * | 2009-12-15 | 2011-06-15 | 沈阳铝镁设计研究院有限公司 | Technology for removing oxalate in Bayer process |
| CN105197970A (en) * | 2014-06-27 | 2015-12-30 | 沈阳铝镁设计研究院有限公司 | Method for improving two-stage decomposition effect |
| CN105480994A (en) * | 2014-09-18 | 2016-04-13 | 沈阳铝镁设计研究院有限公司 | Efficient method for enriching oxalate through washing of fine seeds |
| CN106315646A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Bayer process red mud washing method and system thereof in production process of aluminum oxide |
| CN105399122A (en) * | 2015-12-18 | 2016-03-16 | 东北大学设计研究院（有限公司） | First-tank temperature controlling and discharging grading method for producing sandy aluminium oxide through two-segment decomposition |
Non-Patent Citations (2)
| Title |
|---|
| 贾秀丽: "粉煤灰一步酸溶法固液分离的工艺流程及过滤设备", 《化工管理》 * |
| 赵福辉: "翻盘式真空过滤机在烧结法赤泥分离中的应用研究", 《世界有色金属》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108358220B (en) | Method and device for producing baking soda | |
| CN104649303A (en) | Low temperature Bayer process for alumina production | |
| CN105480994A (en) | Efficient method for enriching oxalate through washing of fine seeds | |
| US8784754B2 (en) | Method for preparing high-purity alumina | |
| CN112645365A (en) | Process for producing lithium carbonate by using salt lake ore | |
| CN110028087B (en) | Method for reducing carbon-alkali concentration of system in alumina production process | |
| CN112456524A (en) | Method for treating fine seeds by using horizontal tilting disk filter | |
| CN112758964A (en) | Process for producing lithium carbonate by mixing spodumene and salt lake ore | |
| CN111573699A (en) | Method for removing sodium oxalate in production process of aluminum oxide | |
| CN113955784A (en) | Method for removing oxalate in one-stage decomposition process | |
| CN1219702C (en) | Red clay separating method for producing alumina by sintering process | |
| CN113461041B (en) | Method for removing oxalate from sodium aluminate solution | |
| CN111484222B (en) | Bayer process red mud concentration process suitable for sintering process production | |
| CN1098810C (en) | Improved method for processing bauxite rich in alumina monohydrate | |
| CN112520764A (en) | Process for producing lithium hydroxide by mixing salt lake ore and lithium polymer | |
| CN112479234A (en) | Process for producing lithium hydroxide monohydrate from salt lake ore | |
| CN112430737A (en) | Method for recovering gallium from extraction gallium precipitation slag | |
| CN112499656A (en) | Treatment method of discharged salt causticization slurry in alumina production | |
| CN219279774U (en) | Copper oxalate production system | |
| CN216918640U (en) | Saturated sodium carbonate high-efficient piece-rate system in aluminium oxide production | |
| CN113753927A (en) | Method for removing sodium oxalate in system for producing alumina by two-stage decomposition through series process | |
| CN116282102A (en) | Method for adding seeds in organic matter removal flow | |
| CN220351733U (en) | Device for separating oxalate in sodium aluminate solution | |
| CN1260129C (en) | Method for treating suspended matter in fabricating alumina | |
| CN116462214A (en) | Production system for preparing low-sodium alumina from metallurgical-grade alumina |
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 |
Application publication date: 20210309 |
|
| RJ01 | Rejection of invention patent application after publication |