CN1594092A - Process for recovering aluminum hydroxide from carbon liquor by sintering method - Google Patents
Process for recovering aluminum hydroxide from carbon liquor by sintering method Download PDFInfo
- Publication number
- CN1594092A CN1594092A CN 200410049745 CN200410049745A CN1594092A CN 1594092 A CN1594092 A CN 1594092A CN 200410049745 CN200410049745 CN 200410049745 CN 200410049745 A CN200410049745 A CN 200410049745A CN 1594092 A CN1594092 A CN 1594092A
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- China
- Prior art keywords
- decomposition
- concentration
- deep
- sintering process
- carbon
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Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000005245 sintering Methods 0.000 title claims abstract description 24
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims abstract description 20
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 38
- 239000012452 mother liquor Substances 0.000 claims abstract description 13
- 239000012065 filter cake Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 28
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 210000000582 semen Anatomy 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000012492 regenerant Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 206010039509 Scab Diseases 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a process for recovering aluminum hydroxide from carbon liquor by sintering method which consists of, controlling the temperature during the carbonation breakdown process to be 60-90 deg. C, letting in CO2, deep decomposing, the Na2OH concentration in the mother liquor being controlled at 0-5g/l, subjecting the deep decomposition to depositing, concentrating and filtering, thus obtaining the filter cake with aluminum hydroxide as the predominating constituent.
Description
Technical field
The sintering process carbon mother liquid reclaims the method for aluminium hydroxide, and the treatment process, particularly carbon mother liquid deep decomposition that relate to a kind of carbon mother liquid in adopting mixed combining method or sintering process production alumina process reclaim the method for aluminium hydroxide.
Background technology
At present, be that the alumina producing producer of raw material adopts mixed combining method technology more adopting diaspore type bauxite.This technology has become the basic skills of industrial production aluminum oxide through secular updating.It has taken into account the characteristics of sintering process and Bayer process, and both are organically combined, farthest utilized ore resource, wherein sintering process has solved the technical barrier of China's low-grade bauxite production aluminum oxide, for the sustainable development of aluminum oxide industry production is laid a good foundation.
In the carbon operation break-down of sintering process system, adopt continuously or the interruption decomposition, feeding CO
2Behind the gas, for guaranteeing the quality of alumina product, usually control its carbon branch rate of decomposition according to the siliceous modulus of seminal fluid, cause to avoid decomposing " excessive " that the content of silicon and alkali increases in the aluminum oxide, therefore partial oxidation aluminium is remained in the carbon mother liquid.Thisly residually cause two kinds of drawbacks: one to alumina technology, remaining in impurity such as sodium aluminate in the carbon mother liquid, water glass very easily scabs on vaporizer, and there are some researches show in the sodium aluminate solution evaporative process, the equilibrium solubility of yellow soda ash changes with aluminum oxide, silicon oxide equal size difference in the solution, alumina content is low more, the equilibrium solubility of yellow soda ash is just high more, otherwise then low more.Consequently have a strong impact on the efficient and the carbon evaporation mother liquid concentration of vaporizer, influence the reduction of sintering process system energy consumption then, be unfavorable for that more China's sintering process technology is to high density production technical development; Its two, remain in the aluminum oxide in the carbon mother liquid, along with the carbon evaporation mother liquor returns batching, this part aluminum oxide is circulated in Production Flow Chart, press carbon mother liquid 10g/l aluminum oxide and 550m
3The carbon mother liquid estimation of/h left and right sides, every day, the round-robin aluminum oxide can reach 100 tons, was seriously restricting the reduction of alumina production cost, and therefore carbon mother liquid being implemented deep decomposition is to put forward an effective way of producing consumption reduction.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above-mentioned prior art residual high deficiency of aluminum oxide in the sintering process carbon mother liquid in producing alumina process, to provide a kind of and can effectively reduce aluminum oxide undying circulation in Production Flow Chart, reducing production costs; Effectively reduce on the vaporizer and scab, the vaporization efficiency of raising vapo(u)rization system and the sintering process carbon mother liquid of evaporating solns concentration reclaim the method for aluminium hydroxide.
The objective of the invention is to be achieved through the following technical solutions.
The sintering process carbon mother liquid reclaims the method for aluminium hydroxide, it is characterized in that: the seminal fluid temperature of control carbonation decomposition course is 60 ℃～90 ℃, CO
2Air flow is 20～50M
3/ M
3 -seminal fluid, control is Na in 1～3 hour, deep decomposition mother liquor the resolving time
2Ok concentration is controlled at 0～5g/l, evenly decomposing terminal, the mother liquor Al after the decomposition are controlled in ventilation
2O
3Concentration is about 2g/l; The deep decomposition slurries enter settlement separate groove, and underflow filters by the band filter through concentrating the back, and the filter cake that obtains major ingredient and be aluminium hydroxide is as the deep decomposition regenerant, and filtrate and subsider overflow mix the charge pulp preparation process that returns sintering process after evaporating.
The present invention adopts Stable Carbon to divide the mother liquid flow rate controlling depth resolving time in continuous carbon separating tests of laboratory simulation and pilot-plant test; By control decomposer carbonic acid gas air flow controlling depth decomposition rate; Adopt quick and accurate caustic alkali analytical procedure controlling depth decomposing terminal; Adopt settlement separate mode to concentrate the deep decomposition slurries, underflow reclaims aluminium hydroxide etc. by the band filter.The deep decomposition slurries are after sedimentation concentrates, and underflow enters the band filter and filters; Sedimentation overflow and the mixing of band filter filtrate enter the charge pulp preparation process of sintering process etc. through evaporation.Adopt technical qualification of the present invention can stablize the aluminium hydroxide product that reclaims in the carbon mother liquid.Effectively reduce aluminum oxide undying circulation in Production Flow Chart, reduce production costs; Reduce scabbing on the vaporizer, improved the vaporization efficiency and the evaporating solns concentration of vapo(u)rization system.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The sintering process carbon mother liquid reclaims the method for aluminium hydroxide, and the seminal fluid temperature of control carbonation decomposition course is 60 ℃～90 ℃, CO
2Air flow is 20～50M
3/ M
3 -seminal fluid, control is Na in 1～3 hour, deep decomposition mother liquor the resolving time
2Ok concentration is controlled at 0～5g/1, evenly decomposing terminal, the mother liquor Al after the decomposition are controlled in ventilation
2O
3Concentration is about 2g/l; The deep decomposition slurries enter settlement separate groove, and underflow filters by the band filter through concentrating the back, and the filter cake that obtains major ingredient and be aluminium hydroxide is as the deep decomposition regenerant, and filtrate and subsider overflow mix the charge pulp preparation process that returns sintering process after evaporating.
Below in conjunction with example method of the present invention is described further.
Embodiment 1
Sintering process carbon mother liquid Al
2O
3Concentration is 10g/l, α
kBe 2.10, temperature is 65 ℃.Add the first groove of deep decomposition behind the flow of control mother liquor continuously and stably, feed concentration and be 30%～38%, tolerance is 20M
3/ M
3The CO of-seminal fluid
2Gas carries out continuous degree of depth carbonating and decomposes; 3 hours resolving times, the Na in the control decomposition nut liquid
2Ok concentration is 5g/l, Al
2O
3Concentration is that 2.05g/l is a decomposing terminal.Slip is through settlement separate after the deep decomposition, and underflow concentrates and enters the filtration of band filter, and the comprehensive utilization or the commercialization that suit after the aluminum hydroxide filter cake packing, filtrate and subsider overflow mix to return produces corresponding operation.
Embodiment 2
Sintering process carbon mother liquid Al
2O
3Concentration is 13g/l, α
kBe 1.95, temperature is 75 ℃.Add the first groove of deep decomposition behind the flow of control mother liquor continuously and stably, feed concentration and be 30%～38%, tolerance is 25M
3/ M
3The CO of-seminal fluid
2Gas carries out continuous degree of depth carbonating and decomposes; 1.5 hours resolving times, the Na in the control decomposition nut liquid
2Ok concentration is 2g/l, Al
2O
3Concentration is that 1.88g/l is a decomposing terminal.Slip is through settlement separate after the deep decomposition, and underflow concentrates and enters the filtration of band filter, and the comprehensive utilization or the commercialization that suit after the aluminum hydroxide filter cake packing, filtrate and subsider overflow mix to return produces corresponding operation.
Embodiment 3
Sintering process carbon mother liquid Al
2O
3Concentration is 9g/l, α
kBe 2.25, temperature is 85 ℃.Add the first groove of deep decomposition behind the flow of control mother liquor continuously and stably, feed concentration and be 30%～38%, tolerance is 40M
3/ M
3The CO of-seminal fluid
2Gas carries out continuous degree of depth carbonating and decomposes; 1.0 hours resolving times, the Na in the control decomposition nut liquid
2Ok concentration is 0g/l, Al
2O
3Concentration is that 1.53g/l is a decomposing terminal.Slip is through settlement separate after the deep decomposition, and underflow concentrates and enters the filtration of band filter, and the comprehensive utilization or the commercialization that suit after the aluminum hydroxide filter cake packing, filtrate and subsider overflow mix to return produces corresponding operation.
Embodiment 4
Sintering process carbon mother liquid Al
2O
3Concentration is 15g/l, α
kBe 1.98, temperature is 90 ℃.Add the first groove of deep decomposition behind the flow of control mother liquor continuously and stably, feed concentration and be 30%～38%, tolerance is 35M
3/ M
3The CO of-seminal fluid
2Gas carries out continuous degree of depth carbonating and decomposes; 2.5 hours resolving times, the Na in the control decomposition nut liquid
2Ok concentration is 1.0g/l, Al
2O
3Concentration is that 1.99g/l is a decomposing terminal.Slip is through settlement separate after the deep decomposition, and underflow concentrates and enters the filtration of band filter, and the comprehensive utilization or the commercialization that suit after the aluminum hydroxide filter cake packing, filtrate and subsider overflow mix to return produces corresponding operation.
Embodiment 5
Sintering process carbon mother liquid Al
2O
3Concentration is 11g/l, α
kBe 1.95, temperature is 75 ℃.Add the first groove of deep decomposition behind the flow of control mother liquor continuously and stably, feed concentration and be 30%～38%, tolerance is 50M
3/ M
3The CO of-seminal fluid
2Gas carries out continuous degree of depth carbonating and decomposes; 2.5 hours resolving times, the Na in the control decomposition nut liquid
2Ok concentration is 2g/l, Al
2O
3Concentration is that 2.05g/l is a decomposing terminal.Slip is through settlement separate after the deep decomposition, and underflow concentrates and enters the filtration of band filter, and the comprehensive utilization or the commercialization that suit after the aluminum hydroxide filter cake packing, filtrate and subsider overflow mix to return produces corresponding operation.
Claims (1)
1. the sintering process carbon mother liquid reclaims the method for aluminium hydroxide, it is characterized in that: the seminal fluid temperature of control carbonation decomposition course is 60 ℃～90 ℃, CO
2Air flow is 20～50M
3/ M
3-seminal fluid, control are Na in 1～3 hour, deep decomposition mother liquor the resolving time
2Ok concentration is controlled at 0～5g/l, evenly decomposing terminal, the mother liquor Al after the decomposition are controlled in ventilation
2O
3Concentration is about 2g/l; The deep decomposition slurries enter settlement separate groove, and underflow filters by the band filter through concentrating the back, and the filter cake that obtains major ingredient and be aluminium hydroxide is as the deep decomposition regenerant, and filtrate and subsider overflow mix the charge pulp preparation process that returns sintering process after evaporating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049745 CN1594092A (en) | 2004-06-25 | 2004-06-25 | Process for recovering aluminum hydroxide from carbon liquor by sintering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049745 CN1594092A (en) | 2004-06-25 | 2004-06-25 | Process for recovering aluminum hydroxide from carbon liquor by sintering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1594092A true CN1594092A (en) | 2005-03-16 |
Family
ID=34665818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410049745 Pending CN1594092A (en) | 2004-06-25 | 2004-06-25 | Process for recovering aluminum hydroxide from carbon liquor by sintering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1594092A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457627C (en) * | 2005-10-12 | 2009-02-04 | 中国铝业股份有限公司 | Monocrystal type aluminum hydroxide production method |
| CN111874927A (en) * | 2020-06-22 | 2020-11-03 | 河南华慧有色工程设计有限公司 | Carbon method aluminum oxide energy-saving emission-reducing production method |
| CN114735739A (en) * | 2022-03-22 | 2022-07-12 | 中铝中州铝业有限公司 | Method for preparing light calcium carbonate by using sintering method carbon content mother liquor |
-
2004
- 2004-06-25 CN CN 200410049745 patent/CN1594092A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457627C (en) * | 2005-10-12 | 2009-02-04 | 中国铝业股份有限公司 | Monocrystal type aluminum hydroxide production method |
| CN111874927A (en) * | 2020-06-22 | 2020-11-03 | 河南华慧有色工程设计有限公司 | Carbon method aluminum oxide energy-saving emission-reducing production method |
| CN114735739A (en) * | 2022-03-22 | 2022-07-12 | 中铝中州铝业有限公司 | Method for preparing light calcium carbonate by using sintering method carbon content mother liquor |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |