AU2021106021A4 - Novel process of combined desulfurization and resource utilization of red mud and lime - Google Patents
Novel process of combined desulfurization and resource utilization of red mud and lime Download PDFInfo
- Publication number
- AU2021106021A4 AU2021106021A4 AU2021106021A AU2021106021A AU2021106021A4 AU 2021106021 A4 AU2021106021 A4 AU 2021106021A4 AU 2021106021 A AU2021106021 A AU 2021106021A AU 2021106021 A AU2021106021 A AU 2021106021A AU 2021106021 A4 AU2021106021 A4 AU 2021106021A4
- Authority
- AU
- Australia
- Prior art keywords
- desulfurization
- red mud
- lime
- flue gases
- slurry
- 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.)
- Ceased
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 63
- 230000023556 desulfurization Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 25
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 24
- 239000004571 lime Substances 0.000 title claims abstract description 24
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 239000002910 solid waste Substances 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 12
- 239000010440 gypsum Substances 0.000 claims abstract description 12
- 239000011734 sodium Substances 0.000 claims abstract description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 6
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 6
- 239000004566 building material Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 3
- 238000004181 pedogenesis Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 2
- 238000005245 sintering Methods 0.000 claims 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims 1
- 229910052938 sodium sulfate Inorganic materials 0.000 claims 1
- 235000011152 sodium sulphate Nutrition 0.000 claims 1
- 239000003513 alkali Substances 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 239000006227 byproduct Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 2
- 239000006228 supernatant Substances 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
- C04B33/1322—Red mud
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The present invention discloses a new process and method of
combined desulfurization and resource utilization of red mud and lime.
Red mud and lime are proportionally mixed to be slurry and put into the
first desulfurization tower circulation tank. The key to the first stage of
desulfurization is that an amount of the lime added meets the full
causticization of sodium and alkali in red mud, and then enter the
supernatant NaOH after desulfurization into the second desulfurization
tower circulation tank. In the second desulfurization tower circulation
tank soda in the supernatant from the first circulation tank is mixed with
the lime added for the second time to be slurry, generating Na 2 SO4
during the circulation process, which reacts with the excess lime to
generate NaOH again. The desulfurization process keeps going on. Initial
desulfurization of flue gases and removal of sodium and alkali in red mud
are achieved in the first stage of the new process. Solid waste after
desulfurization can be used for soil or building materials. In the second
stage of the new process, the deep desulfurization of the flue gases
realizes the ultra-low emission of sulfur dioxide, and the solid waste after
the secondary desulfurization is a by-product gypsum with high purity.
The present invention realizes the simultaneous resource utilization of
the S0 2-containing flue gases and the bulk solid waste red mud, which
conforms to the strategic demand of national environmental governance,
and is a new economic, environmental and low-carbon process of
pollution control.
1/1
Discharging within controlling
index of national standards
EL M NaOH
so,
- NaOH
Utilization of desulfurized red mud
Figure 1
Description
1/1
Discharging within controlling index of national standards
EL M NaOH
so,
- NaOH
Utilization of desulfurized red mud
Figure 1
Novel process of combined desulfurization and resource utilization of
red mud and lime
Technical field
The invention relates to a novel process and method of combined
desulfurization and resource utilization of red mud and lime, which
belongs to the environmental protection field of coupling and resource
utilization of bulk solid waste and sulfur-containing waste gases.
Technology Background
Red mud is a highly alkaline industrial solid waste discharged in
aluminum industries when extracting alumina, and a pH value of red
mud is about 10-12. Generally, 1.0-2.0 tons of red mud is produced per
ton of alumina production. As a major producer of alumina, China emits
millions of tons of red mud every year. In addition to a small part of the
red mud used for building materials and other purposes, most of the red
mud is stored in open dams in a wet condition. The waste liquid of red
mud with high alkalinity and salinity causes salinization of surrounding
soil and deterioration of ecological environment. At the same time, SO 2
is one of the main atmospheric pollutants in China at present, and a
main precursor of environmental acidification. The annual loss due to
major environmental problems such as acid rain caused by SO 2 emission is hundreds of billions of dollars, which has brought great harm to the human survival environment. Therefore, it is urgent to control SO 2 environmental pollution in a low-cost and low-carbon way.
The process of alumina production determines that the red mud
contains a large number of effective sulfur-fixing components, such as
CaO, MgO and Na 20. Coupling red mud and lime not only has good
desulfurization effect, but also can remove alkali from the red mud and
yield by-products of high-precision gypsum, realizing the synchronous
utilization of flue gas containingSO2 and the bulk of solid waste red mud,
which is in line with the social goal of reducing pollution and lowering
carbon in China.
Although the existing lime-gypsum desulfurization method has high
efficiency, it consumes mineral resources and brings secondary pollution
such as solid wastes. Although the existing slurry desulfurization is low in
cost, the resource utilization of slurry or slag afterdesulfurization is
often not considered. Under the background of urgent carbon neutrality
goals, there is a need for a newdesulfurization process that treats gas
and solid waste together and helps reduce pollution and lower carbon.
Summary of the invention
A purpose of the invention is to provide a new process and a new
method of combined desulfurization and resource utilization of red mud and lime, aiming at the deficiency of the current desulfurization processes using only red mud slurry and high cost of limedesulfurization, specifically in a following manner:
(1) adopting two-stage desulfurization design, wherein in stage one,
realizing preliminary desulfurization of red mud coupled with
red mud de-alkalization, and in stage two realizing deep
desulfurization of the red mud and coupling to produce
high-purity desulfurization gypsum; under a condition that a
concentrationof SO2 in inlet flue gases is less than 3000mg/m 3
, by the two-stage desulfurization process requirements of
ultra-low emissionof SO 2 (SO2 is less than 50mg/m 3 ) is met.
(2) Solid waste red mud produced by various alumina production
processes and lime produced in general mines are used for
desulfurization; a purity of the lime shall be above 85 %. The
chemical reactions involved in the present invention are:
2Al 20 3 +9SO2-> 2Al2 (S0 4 ) 3 +3S
CaO+2SO2+ H20-> 2CaSO *12H20
2CaO- SiO2+SO2-> 2CaSO 3 +SiO2
Ca(OH)2+SO2-> CaS0 3 + H20
CaSO 3 +1202-> CaSO 4
Na20+SO2-> Na2SO3
SO2+ H20 -> H2SO3
2Fe2O3+ 4H2SO3+02 -> 4FeSO 4 + 4H 2 0
Ca(OH)2 + FeSO 4 -> Fe(OH)2 + CaSO 4
4Fe(OH)2 + 2H20 + 02 -> 4Fe(OH)
(1) Requirements for working conditions of a stage-one
desulfurization tower: the liquid-solid volume ratio in the
desulfurization tower is controlled at 7-15:1; a concentration of
inlet flue gases is below 3000mg/m 3; a temperature of the slurry is
40-75°C; pH value of circulating liquids is kept at 7-10; a liquid-gas
ratio in thedesulfurization tower is 10-20:1L/m 3; circulating slurry
in the stage-one desulfurization tower is desulfurized by reverse
contact with SO 2 flue gases, with adesulfurization efficiency
85-95%; in the stage-one desulfurization tower, a key lies in a
molar ratio of 1-1.2:1 of the lime added and Na 2 SO 4 formed by
desulfurizing red mud, so as to ensure synchronous realization of
desulfurization and de-alkalinity of red mud.
(2) Requirements for operating conditions of the stage-two
desulfurization tower: the liquid-solid volume ratio in the
desulfurization tower shall be controlled at 20-30:1; a
concentration of inlet flue gases should be below 500mg/m 3 ; a
slurry temperature shall be 40-60°C; a pH value of circulating
liquid should be maintained at 4-6; and a liquid-gas ratio in the
desulfurization tower should be 8-15:1 L/m 3 ; the circulating slurry in the stage-two desulfurization tower is desulfurized by reverse contact with SO 2 flue gases, and thedesulfurization efficiency is more than 90%; a key point in the stage-twodesulfurization tower is that purity of the lime added is consistent with purity of gypsum to meet requirement of caustification and desulfurization and ensure synchronous realization of both desulfurization effects and producing by-product high purity gypsum.
(3) A new two-stage deep desulfurization process through coupling
red mud and lime can realize the ultra-low emission of flue gases
containingSO2, and the content of sodium alkali in red mud after
desulfurization is less than 0.1%, which meets the requirements of
sintered brick and soil formation and the by-product high-purity
gypsum (purity is greater than 95%), meets the requirements of
raw materials for gypsum building materials.
The beneficial effects of the present invention: the present
invention makes full use of the active sodium alkali and solid alkali in the
red mud to realize the preliminary desulfurization of flue gases, which
meets national demands of solid waste resource utilization and carbon
emission reduction; according to the transformation of alkalinity in the
process of red mud desulfurization, an intermediate medium of lime is
skillfully introduced to solve the bottleneck that the existence of active
alkali constrains the large-scale utilization of red mud. The present invention adopts a new process of two-stage reverse contact desulfurization. The first stage is preliminary desulfurization with a high solid-liquid ratio of the mixed slurry, and the second stage is deep desulfurization with a low solid-liquid ratio. The two-stage desulfurization successfully addressed requirements of the two resource utilization of removing alkali from the red mud and increasing the purity of gypsum on the process, and truly realizes the total utilization of red mud, which is conducive to realization of the goal of carbon neutrality in
2060.
Embodiments
The present invention is further explained in detail with an example
of joint treatment of flue gases from aluminum industries and red mud,
but the scope of protection is not limited to the content described below,
and the specific steps of the process are as follows:
(1) Blend Bayer red mud with 15 % lime for thedesulfurization of
flue gases generated in boilers of alumina production enterprises. Grind
the red mud solid to 100 meshes, and then mix the red mud solid after
grinding and the lime added with water at a solid -liquid ratio of 1:8 to
obtain the red mud slurry. The mass percentage of the main components
of the red mud solid is 20% A1 2 0 3 , 8% SiO 2, 25% Fe 20 3, 20% CaO, 7%
Na 20 and 3% TiO 2 .
(2) Operating conditions in the stage-one desulfurization tower: the liquid-solid volume ratio in the desulfurization tower is controlled at 8:1; the concentration of imported flue gases is 1500-2200mg/m 3 ; the slurry temperature is 55-70°C; pH value of circulating liquid is maintained at
8.5; the liquid-gas ratio in the desulfurization tower is 10:1L/m 3 , and the
circulating slurry in the stage-one desulfurization tower is desulfurized by
reverse contact withSO 2 flue gases, and thedesulfurization efficiency is
(3) Operating conditions in the stage-two desulfurization tower: the
liquid-solid volume ratio in the desulfurization tower is controlled at 20:1;
the concentration of imported flue gas is 300-350mg/m 3 ; the slurry
temperature is 50-55°C; pH value of the circulating liquid is maintained
at 5.5; the liquid-gas ratio in thedesulfurization tower is 8:1 L/m 3 ; the
circulating slurry in the stage-two desulfurization tower is desulfurized
by reverse contact withSO 2 flue gases, and thedesulfurization efficiency
is above 93%.
(4) The new two-stage deep desulfurization process coupling red mud
and lime realizes that the emission concentrationof S02-containing flue
gases is lower than 35mg/m 3 . This concentration is actually super low.
The new process also realizes that the sodium alkali of red mud after
desulfurization is less than 0.1%, and the purity of by-product gypsum is
more than 95%.
Claims (3)
1. A novel process of combined desulfurization and resource utilization
of red mud and lime; specifically in following steps:
(1) Blending slurry of solid waste red mud produced by various
alumina processes and mixing with lime in a first circulation tank;
a volumetric ratio of liquid and solid is controlled at 7-15: 1 to
achieve preliminary desulfurization of flue gases;
(2) A key of claim 1 is that a molar ratio of lime added to Na 2 SO 4
formed from red mud after desulfurization is 1-1.2: 1, which
makes sodium sulfate fully causticized to produce NaOH, and then
NaOH enters a second circulation tank;
(3)A degree of desulfurization in claim 1 is coupled with the
de-alkalization of red mud so that consequent solid waste meets
requirements for sodium alkalinity of sintering bricks and red mud
soil formation;
(4) SO2 concentration of flue gases in claim 1 is below 3000mg / M 3;
temperature of slurry 40-75 C; pH value of circulating liquid 7-10;
(5) In the first circulating tank, circulating slurry and SO 2 flue gases are
desulfurized by reverse contact, and thedesulfurization efficiency
is 85~95%.
2. Adding lime in the second circulation tank to meet the requirements
of desulfurization and ensure that Na 2SO 4 is fully causticised and the liquid-solid ratio is controlled at 20-30: 1 to achieve ultra-low emission of sulfur-containing flue gases and recycle refined gypsum.
(1) The concentration of SO2 in the flue gases required in claim 2 is
below 500 mg / M 3 , slurry temperature at 40-60 °C, and pH value
of circulating liquid at 4-6.
(2) In the second circulating tank, circulating slurry and S02-containing
flue gases are desulfurized by reverse contact, and the
desulfurization efficiency is above 90%.
3. According to claim 1 and claim 2, proposing a new process of
combined desulfurization and resource utilization of red mud and
lime; the liquid-solid ratio in the first desulfurization tower is
10-20:1L/m3, and the liquid-solid ratio in the seconddesulfurization
tower is 8-15:1 L/m 3 . The solid wastes produced in the stage-one
desulfurization tower meet the requirements of soil formation and
sintering bricks for raw materials, and refined gypsum produced in
the stage-two desulfurization tower meets the requirements of
building materials for raw materials.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902188.9A CN113845138B (en) | 2021-08-06 | 2021-08-06 | Method for deep desulfurization and full quantitative utilization of red mud |
| CN202110902188.9 | 2021-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021106021A4 true AU2021106021A4 (en) | 2021-10-28 |
Family
ID=78179616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021106021A Ceased AU2021106021A4 (en) | 2021-08-06 | 2021-08-19 | Novel process of combined desulfurization and resource utilization of red mud and lime |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113845138B (en) |
| AU (1) | AU2021106021A4 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749008B (en) * | 2022-05-16 | 2023-12-15 | 昆明理工大学 | MgCl utilization 2 Strengthening dealkalization and SO absorption of red mud 2 And method for utilizing ore pulp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105903333B (en) * | 2016-06-23 | 2018-11-16 | 上海交通大学 | A kind of flue gas process for deep desulphurization of magnesium fortified red mud |
| CN106882932B (en) * | 2017-02-07 | 2019-06-04 | 郑州大学 | A kind of method of comprehensive utilization of red mud |
| CN110841463A (en) * | 2019-09-29 | 2020-02-28 | 上海交通大学 | Red mud dealkalization method coupled with calcium flue gas desulfurization process |
-
2021
- 2021-08-06 CN CN202110902188.9A patent/CN113845138B/en active Active
- 2021-08-19 AU AU2021106021A patent/AU2021106021A4/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN113845138A (en) | 2021-12-28 |
| CN113845138B (en) | 2023-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101913632B (en) | Method for extracting aluminum oxide, monox and ferric oxide from gangue combustion ashes | |
| CN100415348C (en) | Phosphate rock slurry catalytically oxidaizing process for removing low concentration SO2 | |
| CN105903333B (en) | A kind of flue gas process for deep desulphurization of magnesium fortified red mud | |
| CN104556155B (en) | Chlor-alkali tailing and ammonia alkali tailing is utilized to produce the method for soda ash | |
| CN103588226A (en) | Method for preparing sodium carbonate by supplementing CO2 to flue gas | |
| CN109607491A (en) | A kind of method that Desulphurization prepares sulfuric acid | |
| CN104843749A (en) | Method for preparing raw materials of cementing materials from magnesia desulfurized waste fluid and waste residues | |
| AU2021106021A4 (en) | Novel process of combined desulfurization and resource utilization of red mud and lime | |
| CN107261825A (en) | A kind of cement kiln flue gas catalytic desulfurization aqua | |
| CN105642651A (en) | Method for improving desulphurization ash stability | |
| CN103585869A (en) | Flue gas purifying method with recyclable alkali absorption liquid | |
| CN106563353A (en) | Method for utilizing Bayer process red mud slurry for catalytic oxidation treating of low-concentration SO2 smoke | |
| CN114888056B (en) | Method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash | |
| CN109626339A (en) | A kind of method that gypsum prepares sulfuric acid | |
| CN113426275A (en) | Process for mineralizing carbon dioxide by utilizing desulfurization waste residues | |
| CN105664707A (en) | Additive for desulfurization, denitrification and mercury removal of flue gas of thermal power plant and preparation method and application of additive | |
| CN112619372A (en) | Novel calcination tail gas desulfurization method | |
| CN111014230A (en) | Low-temperature oxidation method of dry-method and semi-dry-method desulfurized ash | |
| CN107188436A (en) | A kind of green cement and preparation method thereof | |
| CN1448209A (en) | Flue gas dry desulfurizing pollution-controlling technique | |
| CN103432881A (en) | Synthesis of novel energy by using sulfur dioxide or carbon dioxide as raw materials | |
| CN104147917B (en) | Fume desulphurization method | |
| CN1320945C (en) | Method for carrying out flue gas desulfurization by using mineral powder of magnesite | |
| CN101613111A (en) | A kind of processing method of producing sodium silicate and recovering sulfur dioxide to produce sulfuric acid | |
| CN113636574B (en) | Method for preparing sulfur-containing chemical products by resource utilization of semi-dry desulfurization ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |