CN109603452A - A method of it improving red mud and holds sulfur content and recycling - Google Patents

A method of it improving red mud and holds sulfur content and recycling Download PDF

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Publication number
CN109603452A
CN109603452A CN201811571295.2A CN201811571295A CN109603452A CN 109603452 A CN109603452 A CN 109603452A CN 201811571295 A CN201811571295 A CN 201811571295A CN 109603452 A CN109603452 A CN 109603452A
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CN
China
Prior art keywords
red mud
flue gas
sulfur dioxide
slurries
slurry
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Pending
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CN201811571295.2A
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Chinese (zh)
Inventor
李彬
王婕
宁平
张英杰
董鹏
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Priority to CN201811571295.2A priority Critical patent/CN109603452A/en
Publication of CN109603452A publication Critical patent/CN109603452A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502Sulfur 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/507Sulfur oxides by treating the gases with other liquids
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/402Alkaline earth metal or magnesium compounds of magnesium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/604Hydroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment

Abstract

The present invention discloses a kind of method for improving red mud and holding sulfur content and recycling, sulfur dioxide flue gas will be contained and be passed through red mud slurry, aluminum nitrate and magnesium hydroxide is added into slurries when red mud slurry pH is reduced to 2.2, then proceed by the desulfurization of sulfur dioxide flue gas, it is recycled to ferric ion concentration in slurries and stops desulfurization after being lower than 0.5mol/L, by the slurries mud-water separation after processing flue gas, obtained precipitating is dried, the precipitating after drying prepares suppression cigarette baking-free brick of red mud as additive;The present invention carries out scrubbing CO_2 processing to flue gas using industrial waste red mud, waste recycling, the appearance sulfur content of red mud slurry is also improved simultaneously, the red mud precipitating obtained after processing can be used as additive preparation suppression cigarette baking-free brick of red mud, prepared baking-free brick of red mud has smoke suppressing, is a kind of economic and environment-friendly disposal of resources method.

Description

A method of it improving red mud and holds sulfur content and recycling
Technical field
The present invention relates to a kind of methods that raising red mud holds sulfur content and recycling, belong to industrial residue and recycle purified industrial Exhaust gas field.
Background technique
Red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide, and average 1 ton of aluminium oxide of every production is attached Band generates 1.0~2.0 tons of red muds.As alumina producing big country, the red mud discharged every year is up to millions of tons in China.It generates Red mud is in addition to small part is applied to the purposes such as construction material, and most of red muds are using the outdoor storage dam stockpiling of wet process.It is high alkalinity, with high salt The red mud waste liquid of degree causes Soil Surrounding salinization of soil, deteriorates ecological environment.
China's atmosphere pollution is got worse, and the pollutant of Atmospheric Sulfur is one of main pollutant, the gaseous contamination of sulphur Object mainly has sulfur dioxide, hydrogen sulfide, sulfur trioxide etc..Sulfide sulfur dioxide in atmosphere be mainly derived from Thermal Power Generation Industry, The flue gas of nonmetallic grounded module, chemical industry manufacturing industry and smelting industry discharge.China's sulfur dioxide pollution situation is more next It is more serious, cause it is annual merely due to the much hundreds billion of members of the loss of the great environmental problems such as acid rain caused by sulfur dioxide (SO2) emissions, High risks are brought to the living environment of the mankind, therefore extremely urgent to the pollution control of sulfur dioxide.
Process for making alumina, which determines in red mud, effectively consolidates sulphur ingredient containing a large amount of, such as CaO, MgO and Na2O etc., benefit With red mud desulfurization, desulfurization effect is good, can also make red mud dealkalize itself.In conventional red mud desulphurization reaction, when pH is reduced to 2.2 When left and right, Fe(II is closed due to generating a large amount of sulfate ion meeting and the hydroxyl generated) ion formation steric restriction effect, reaction stops Only.
Summary of the invention
The purpose of the present invention is being directed to the deficiency of current sulfur removal technology, a kind of raising red mud is provided and holds sulfur content and recycling Method, the specific steps are as follows:
(1) by red mud solid abrasive to 100-600 mesh, the red mud after grinding is uniformly mixed with water 1:10-30 in mass ratio, is obtained To red mud slurry;
(2) red mud slurry of step (1) is squeezed into reactor by centrifugal pump, it is continuous also by aeration head containing sulfur dioxide flue gas By reactor, controlling reaction temperature is 20-45 DEG C, and stirring makes to come into full contact with containing sulfur dioxide flue gas with red mud slurry, works as slurry When liquid pH value is reduced to 2.2, due to generating a large amount of sulfate ions, sulfate ion meeting and the hydroxyl generated close Fe(II) ion shape At steric restriction effect, reaction stops, and stopping is passed through containing sulfur dioxide flue gas;
(3) sulfate ion content in detecting step (2) slurries, according to the substance of sulfate ion, aluminum nitrate and magnesium hydroxide The ratio between amount be 1:2:6 ratio, aluminum nitrate and magnesium hydroxide are added in the reactor of step (2), detection is at this time in slurries The concentration of sulfate ion, so that it is determined that the amount of the aluminum nitrate and magnesium hydroxide that add, aluminum nitrate and magnesium hydroxide and sulfate radical Ionic reaction removes sulfate ion, then proceedes to be passed through into slurries containing sulfur dioxide flue gas, sulfate ion can accumulate again Tired, desulphurization reaction stops again, circulation step (2) and step (3), while detecting ferrous ion concentration and ferric iron in slurries Ion concentration, until ferric ion concentration is lower than 0.5mol/L, stopping is passed through containing sulfur dioxide flue gas;
(4) slurries after step (3) fully reacting carry out mud-water separation, and what is obtained is deposited in 60-80 DEG C of drying 24 hours or more, Suppression cigarette baking-free brick of red mud is prepared using the precipitating after drying as additive.
The main component mass percent of step (1) red mud solid is Al2O318-25%, SiO28-14%, Fe2O325-40%, CaO12-16%, Na2O2-8%, TiO21-4%。
The concentration of step (2) containing sulfur dioxide in sulfur dioxide flue gas is 600-1000mg/m3, it is passed through reactor per minute Flue gas volume and red mud slurry gas liquid ratio be 200-400:1.
The specific method of step (4) preparation suppression cigarette baking-free brick of red mud is by the precipitating after drying, original red mud powder, fine coal The ratio that ash, quartz sand, lime, gypsum, cement are 5-10:8-25:24-30:25-30:8-12:3-5:1-3 according to mass ratio Obtained precipitating, quartz sand, gypsum are crushed to partial size 100mm hereinafter, raw material mix and add water by feeding, aqueous Amount is 10-15%, stirs evenly, is aged 24 hours or more, and compression moulding is to get suppression cigarette baking-free brick of red mud.
Chemical reaction of the present invention are as follows:
Beneficial effects of the present invention:
Mixture of the present invention by the way that aluminum sulfate and magnesium hydroxide is added removes the sulfate radical that desulphurization reaction generates as additive Ion reduces and closes Fe(II with hydroxyl) ion forms steric restriction effect, to improve the appearance sulphur of red mud slurry, compares existing red Mud sulfur method, desulfurization time is longer, it is bigger to hold sulfur content, the desulfuration efficiency of red mud is improved, to the removal rate of sulfate ion Up to 97%, separating obtained sediment includes the higher houghite product of added value, can be used as additive be added to it is original red In the non-burning brick component of mud, cigarette baking-free brick of red mud is preferably pressed down with processability.
Specific embodiment
Below with reference to specific implementation example, invention is further described in detail, but protection scope of the present invention and unlimited In the content.
Embodiment 1
A method of it improving red mud and holds sulfur content and recycling, the specific steps are as follows:
(1) by red mud solid abrasive to 100 mesh, the red mud after grinding is uniformly mixed to obtain red mud slurry with water 1:10 in mass ratio Liquid, the main component mass percent of red mud solid are Al2O320%, SiO28%, Fe2O335%, CaO12%, Na2O5%, TiO23%;
(2) red mud slurry of step (1) is squeezed into reactor by centrifugal pump, it is continuous also by aeration head containing sulfur dioxide flue gas By reactor, the concentration containing sulfur dioxide in sulfur dioxide flue gas is 600mg/m3, be passed through per minute the flue gas of reactor with The gas-liquid volume ratio of red mud slurry is 200:1, and control reaction temperature is 20 DEG C, and stirring makes containing sulfur dioxide flue gas and red mud slurry It comes into full contact with, when slurry pH value is reduced to 2.2, sulfur dioxide exit concentration rises to 150mg/m3When, due to generating a large amount of sulfuric acid Radical ion, sulfate ion meeting and the hydroxyl generated close Fe(II) ion formation steric restriction effect, reaction stopping, stopping, which is passed through, to be contained Sulfur dioxide flue gas;
(3) sulfate ion content in detecting step (2) reactant, according to the object of sulfate ion, aluminum nitrate and magnesium hydroxide The ratio between amount of matter is the ratio of 1:2:6, and aluminum nitrate and magnesium hydroxide are added in the reactor of step (2), detects slurries at this time Middle sulfate ion concentration, so that it is determined that the amount of the aluminum nitrate and magnesium hydroxide that add, aluminum nitrate and magnesium hydroxide and sulfate radical Ionic reaction removes sulfate ion, after reaction, detects sulfate ion in slurries, theoretically sulfate ion concentration=0, so After continue to be passed through into slurries containing sulfur dioxide flue gas, sulfate ion can accumulate again, and desulphurization reaction stops again, circulation step Suddenly (2) and step (3), while ferrous ion concentration and ferric ion concentration in slurries are detected, until ferric ion is dense Degree is lower than 0.5mol/L, and ferric ion concentration is too low, and ferrous ion concentration is excessively high, is unfavorable for reacting lasting progress, so Stopping is passed through containing sulfur dioxide flue gas, red mud failure, desulfuration efficiency about 97%;
It (4) is mainly that the acid non-soluble substances such as metal ion, silica and houghite are heavy in the slurries after step (3) fully reacting Starch etc. carries out mud-water separation, is deposited in 60 DEG C of dryings 24 hours for what is obtained, the precipitating after drying is as baking-free brick of red mud Smoke suppression additives use, specific method be will precipitate, original red mud powder, flyash, quartz sand, lime, gypsum, cement by According to mass ratio be 5:8:27:28:8:3:3 ratio feeding, by obtained precipitating, quartz sand, gypsum be crushed to partial size 100mm with Under, water is added after raw material is mixed, water content is 10% in mixture, is stirred evenly, ripening, compression moulding, it conserves, Up to suppression cigarette baking-free brick of red mud.
Comparative example 1: changing the precipitating in step (4) into original red mud powder, other raw materials and processing method are constant, system Standby baking-free brick of red mud.
If the following table 1 is the baking-free brick of red mud that embodiment 1 presses down cigarette baking-free brick of red mud and comparative example 1 is prepared, in smoke density Its smoke suppressing is tested in test box;By in table it is found that embodiment 1 press down cigarette baking-free brick of red mud it is more red than what comparative example 1 was prepared Mud is non-burning brick compared to smoke suppressing.
Table 1
Embodiment 2
A method of it improving red mud and holds sulfur content and recycling, the specific steps are as follows:
(1) by red mud solid abrasive to 300 mesh, the red mud after grinding is uniformly mixed to obtain red mud slurry with water 1:20 in mass ratio Liquid, the main component mass percent of red mud solid are Al2O318%, SiO210%, Fe2O325%, CaO15%, Na2O2%, TiO21%;
(2) red mud slurry of step (1) is squeezed into reactor by centrifugal pump, it is continuous also by aeration head containing sulfur dioxide flue gas By reactor, the concentration containing sulfur dioxide in sulfur dioxide flue gas is 650mg/m3, it is passed through the flue gas body of reactor per minute The long-pending gas-liquid volume ratio with red mud slurry is 300:1, and control reaction temperature is 25 DEG C, and stirring makes containing sulfur dioxide flue gas and red mud Slurries come into full contact with, and when slurry pH value is reduced to 2.2, sulfur dioxide exit concentration rises to 200mg/m3When, it is a large amount of due to generating Sulfate ion, sulfate ion meeting and the hydroxyl generated close Fe(II) ion formation steric restriction effect, it reacts and stops, stopping logical Enter to contain sulfur dioxide flue gas;
(3) sulfate ion content in detecting step (2) reactant, according to the object of sulfate ion, aluminum nitrate and magnesium hydroxide The ratio between amount of matter is the ratio of 1:2:6, and aluminum nitrate and magnesium hydroxide are added in the reactor of step (2), detects slurries at this time Middle sulfate ion concentration, so that it is determined that the amount of the aluminum nitrate and magnesium hydroxide that add, aluminum nitrate and magnesium hydroxide and sulfate radical Ionic reaction removes sulfate ion, after reaction, detects sulfate ion in slurries, theoretically sulfate ion concentration=0, so After continue to be passed through into slurries containing sulfur dioxide flue gas, sulfate ion can accumulate again, and desulphurization reaction stops again, circulation step Suddenly (2) and step (3), while ferrous ion concentration and ferric ion concentration in slurries are detected, until ferric ion is dense Degree is lower than 0.5mol/L, and ferric ion concentration is too low, and ferrous ion concentration is excessively high, is unfavorable for reacting lasting progress, so Stopping is passed through containing sulfur dioxide flue gas, red mud failure, desulfuration efficiency about 97%;
It (4) is mainly that the acid non-soluble substances such as metal ion, silica and houghite are heavy in the slurries after step (3) fully reacting Starch etc. carries out mud-water separation, is deposited in 70 DEG C of dryings 25 hours for what is obtained, the precipitating after drying is as baking-free brick of red mud Smoke suppression additives use, specific method be by the precipitating after drying, original red mud powder, flyash, quartz sand, lime, gypsum, The ratio feeding for being 7:20:24:25:10:5:1 according to mass ratio of cement, obtained precipitating, quartz sand, gypsum are crushed to Partial size 100mm is hereinafter, add water after raw material is mixed, water content is 15% in mixture, stir evenly, ripening 25 it is small When, compression moulding, maintenance is to get suppression cigarette baking-free brick of red mud.
Comparative example 2: changing the precipitating in step (4) into original red mud powder, other raw materials and processing method are constant, system Standby baking-free brick of red mud.
If the following table 2 is the baking-free brick of red mud that embodiment 2 presses down cigarette baking-free brick of red mud and comparative example 2 is prepared, in smoke density Its smoke suppressing is tested in test box;By in table it is found that embodiment 2 presses down cigarette red mud brick than red mud brick that comparative example 2 is prepared Compared to smoke suppressing.
Table 2
Embodiment 3
A method of it improving red mud and holds sulfur content and recycling, the specific steps are as follows:
(1) by red mud solid abrasive to 600 mesh, the red mud after grinding is uniformly mixed to obtain red mud slurry with water 1:30 in mass ratio Liquid, the main component mass percent of red mud solid are Al2O325%, SiO214%, Fe2O340%, CaO16%, Na2O8%, TiO24%;
(2) red mud slurry of step (1) is squeezed into reactor by centrifugal pump, it is continuous also by aeration head containing sulfur dioxide flue gas By reactor, the concentration containing sulfur dioxide in sulfur dioxide flue gas is 550mg/m3, it is passed through the flue gas body of reactor per minute The long-pending gas-liquid volume ratio with red mud slurry is 400:1, and control reaction temperature is 25 DEG C, and stirring makes sulfur dioxide flue gas and red mud slurry Liquid comes into full contact with, and when slurry pH value is reduced to 2.2, sulfur dioxide exit concentration rises to 150mg/m3When, due to generating a large amount of sulphur Acid ion, sulfate ion meeting and the hydroxyl generated close Fe(II) ion formation steric restriction effect, it reacts and stops, stopping being passed through Containing sulfur dioxide flue gas;
(3) sulfate ion content in detecting step (2) reactant, according to the object of sulfate ion, aluminum nitrate and magnesium hydroxide The ratio between amount of matter is the ratio of 1:2:6, and aluminum nitrate and magnesium hydroxide are added in the reactor of step (2), detects slurries at this time Middle sulfate ion concentration, so that it is determined that the amount of the aluminum nitrate and magnesium hydroxide that add, aluminum nitrate and magnesium hydroxide and sulfate radical Ionic reaction removes sulfate ion, after reaction, detects sulfate ion in slurries, theoretically sulfate ion concentration=0, so After continue to be passed through into slurries containing sulfur dioxide flue gas, sulfate ion can accumulate again, and desulphurization reaction stops again, circulation step Suddenly (2) and step (3), while ferrous ion concentration and ferric ion concentration in slurries are detected, until ferric ion is dense Degree is lower than 0.5mol/L, and ferric ion concentration is too low, and ferrous ion concentration is excessively high, is unfavorable for reacting lasting progress, so Stopping is passed through containing sulfur dioxide flue gas, red mud failure, desulfuration efficiency about 97%;
It (4) is mainly that the acid non-soluble substances such as metal ion, silica and houghite are heavy in the slurries after step (3) fully reacting Starch etc. carries out mud-water separation, is deposited in 80 DEG C of dryings 24 hours for what is obtained, the precipitating after drying is as baking-free brick of red mud Smoke suppression additives use, specific method be will precipitate, original red mud powder, flyash, quartz sand, lime, gypsum, cement by The ratio feeding for being 10:25:30:30:12:4:2 according to mass ratio, is crushed to partial size for obtained precipitating, quartz sand, gypsum For 100mm hereinafter, adding water after raw material is mixed, water content is 12% in mixture, is stirred evenly, ripening 24 hours, is pressed Type is made, maintenance is to get suppression cigarette baking-free brick of red mud.
Comparative example 3: changing the precipitating in step (4) into original red mud powder, other raw materials and processing method are constant, system Standby baking-free brick of red mud.
If the following table 3 is the baking-free brick of red mud that embodiment 3 presses down cigarette baking-free brick of red mud and comparative example 3 is prepared, in smoke density Its smoke suppressing is tested in test box;By in table it is found that embodiment 3 press down cigarette baking-free brick of red mud it is more red than what comparative example 3 was prepared Mud is non-burning brick compared to smoke suppressing.
Table 3
After the suppression cigarette red mud brick prepared in embodiment 1-3 passes through in smoke density test box, smoke density is respectively 85,88,89;Institute is right The smoke density grade answered is respectively 72,72,72, less than 75, referring to GBT20284-2006 standard, belongs to B1 grades of materials, meets suppression The requirement of cigarette material.

Claims (4)

1. a kind of method for improving red mud and holding sulfur content and recycling, which is characterized in that specific step is as follows:
(1) red mud is ground to 100-600 mesh, the red mud after grinding is uniformly mixed with water 1:10-30 in mass ratio, is obtained red Slurry liquid;
(2) red mud slurry of step (1) is pumped into reactor, continues through reaction also by aeration head containing sulfur dioxide flue gas Device, control reaction temperature are 20-45 DEG C, and stirring slurry comes into full contact with flue gas and red mud slurry containing sulfur dioxide, works as slurries When pH value is reduced to 2.2, stopping is passed through containing sulfur dioxide flue gas;
(3) sulfate ion content in detecting step (2) slurries, according to the substance of sulfate ion, aluminum nitrate and magnesium hydroxide The ratio between amount be 1:2:6 ratio, aluminum nitrate and magnesium hydroxide are added in the reactor of step (2), then proceedes to slurries In be passed through containing sulfur dioxide flue gas, circulation step (2) and step (3), until slurries in ferric ion concentration be lower than 0.5mol/ L, stopping are passed through sulfur dioxide flue gas;
(4) slurries after step (3) fully reacting carry out mud-water separation, and what is obtained is deposited in 60-80 DEG C of drying 24 hours or more, Suppression cigarette baking-free brick of red mud is prepared using the precipitating after drying as additive.
2. improving the method that red mud holds sulfur content and recycling according to claim 1, which is characterized in that step (1) red mud Component and mass percent are Al2O318-25%, SiO28-14%, Fe2O325-40%, CaO 12-16%, Na2O 2-8%, TiO21- 4%。
3. improving the method that red mud holds sulfur content and recycling according to claim 1, which is characterized in that step (2) contains dioxy The concentration for changing sulphur sulfur dioxide in flue gas is 600-1000mg/m3, it is passed through the flue gas of reactor and the gas of red mud slurry per minute Liquor ratio is 200-400:1.
4. improving the method that red mud holds sulfur content and recycling according to claim 1, which is characterized in that step (4) preparation suppression The specific method of cigarette baking-free brick of red mud be by the precipitating after drying, original red mud powder, flyash, quartz sand, lime, gypsum, The ratio feeding that cement is 5-10:8-25:24-30:25-30:8-12:3-5:1-3 according to mass ratio, by obtained precipitating, stone Sand, gypsum are crushed to partial size 100mm hereinafter, adding water after raw material is mixed, and water content 10-15%, stirring is Even, ageing 24 hours or more, compression moulding is to get suppression cigarette baking-free brick of red mud.
CN201811571295.2A 2018-12-21 2018-12-21 A method of it improving red mud and holds sulfur content and recycling Pending CN109603452A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101205126A (en) * 2006-12-22 2008-06-25 洛阳中超非金属材料有限公司 Red-mud coal ash baking-free brick
CN101468905A (en) * 2007-12-28 2009-07-01 刘贵堂 Red mud unburned brick and preparation thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101205126A (en) * 2006-12-22 2008-06-25 洛阳中超非金属材料有限公司 Red-mud coal ash baking-free brick
CN101468905A (en) * 2007-12-28 2009-07-01 刘贵堂 Red mud unburned brick and preparation thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
吴小缓主编: "《工业固废处理与利用技术研究及应用新进展》", 31 July 2017 *
左晓琳等: "拜耳法赤泥脱硫特性研究", 《硅酸盐通报》 *
欧阳二明等: "铝镁复盐法去除工业废水中硫酸盐的试验研究", 《工业水处理》 *

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