CN110055365A - A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement - Google Patents
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement Download PDFInfo
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- CN110055365A CN110055365A CN201910290636.7A CN201910290636A CN110055365A CN 110055365 A CN110055365 A CN 110055365A CN 201910290636 A CN201910290636 A CN 201910290636A CN 110055365 A CN110055365 A CN 110055365A
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- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
-
- 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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The method of a kind of calcification of the invention-carbonization iron red mud recycling iron and tailings cement, processing step are as follows: (1) by calcification-carbonizatin method, treated that processing is dried and dehydrated in iron red mud；(2) slag former and red mud mixing are ground, to vortex stirring melting and reducing high temperature furnace swirl center and is rolled into molten bath without sintering directly blowing；(3) it carries out being passed through gaseous reducing agent reduction 10-60min while vortex stirring in 1300-1600 DEG C of molten bath；(4) reduction molten iron and liquid slag difference overflow separation are obtained；(5) ferrochrome, ferromanganese smelting are added in molten iron into wear resistant cast iron；(6) liquid slag adjusts composition in vortex stirring high temperature furnace and complies with cement requirement；(7) liquid slag it is cooling, it is broken, grinding be directly becoming clinker.The utilization rate of red mud of the present invention is 100%, and the recovery rate of iron is respectively 90% or more.
Description
Technical field:
The invention belongs to environmental protection technical fields, and in particular to a kind of calcification-carbonization iron red mud recycling iron and tailings
The method of cement.
Background technique:
Red mud be using bauxite as waste aluminium oxide or aluminium hydroxide after generated strong basicity solid waste.Mesh
Before, global red mud reserves estimation alreadys exceed 3,000,000,000 tons, and is about increased every year with 1.2 hundred million tons of speed, and world's red mud is flat
Equal utilization rate is 15%.Chinese red mud adds up volume of cargo in storage and has risen to 600,000,000 tons, and is about increased every year with 100,000,000 tons of speed,
Chinese red mud utilization rate is only 4%.The method disposition that most of red mud still takes land to store up.Red mud pilling not only wastes
Secondary resource occupies a large amount of soils, and destroys the surrounding enviroment of red mud dump, brings serious environmental problem, causes
The environmental protection pressure of aluminum i ndustry increases severely.The environmental risk of red mud pilling causes the weight of government, each alumina producing state and enterprise already
Depending on solving the problems, such as that the key of red mud is research and development red mud comprehensive utilization technique.
To realize that efficient utilization and the valuable element of red mud extract, China's aluminum i ndustry has carried out a large amount of R&D work,
Existing red mud generally can be divided into two kinds using technology: one is as general raw material of industry whole utilization, Ru Zhaoguang is bright etc.
Human hair bright " a method of utilize red mud produce clinker " (application number: CN201210031710.1), is red to dealkalize
Dealkalize gypsum and flyash are added in mud, three of the above material are uniformly mixed in agitator tank, while adding water by its concentration tune
It is whole to 30%.It is lower than 25% using plate and frame high-pressure pressure filter filters pressing to solid mixture water content, is then fed into rotary kiln and forges
Calcination of cement clinker；A kind of " technique that aluminum i ndustry technique waste residue is all transformed into ecological architectural material of Wang Wenju et al. invention
With method " (application number: CN200710105971), using aluminum i ndustry in process of production institute's output solid waste red mud (burn
Connection, Bayer process), boiler slag, milltailings, ashing slag, gas generator slag, six kinds of waste residues itself of sludge substance category
Property, by drying, crushing, rational proportion, machine-shaping (roll, squeeze) consolidation or sintering process, it is converted into novel road and uses
Material and construction material.
Also there is the technology extracted from red mud and have the valuable metals element such as Na, Al, Fe, rare metal；The invention such as Lou Dongmin
" a kind of dealkalization method of Bayer process red mud " (application number: CN201810572642.7) first red mud is ground, make red mud
Surface Renewal, then again to de-alkali reaction is carried out after the red mud that Surface Renewal is handled is mixed with milk of lime, by dealkalize
Red mud slurry after reaction washed, solid-liquor separation, can obtain the solution containing alkali, returning alumina production procedure, separation
The red mud of Lower alrali content send red mud dam to store up afterwards；
" from the red mud method of the valuable metals such as comprehensive recovery of iron, aluminium, scandium, titanium, vanadium, the application number of the inventions such as Dong Hongjun
CN201410121083.X ", which mixes red mud with reducing agent, carries out reduction roasting, makes Fe2O3It is converted to Fe3O4, obtained by magnetic separation
To Armco magnetic iron concentrate and non-magnetic product, non-magnetic product dissolves out aluminium oxide by ammonium hydroxide, and washed-residue and water are made into ore pulp, as
Absorbent absorbs the SO in coal-fired flue-gas2, high concentrated acid is added into washed-residue and carries out acidolysis, dissolves out scandium, titanium in acid hydrolysis solution,
After filtering out acidolysis slag, to acid hydrolysis solution be added metatitanic acid crystal seed, titanium in the form of metatitanic acid by hydrolysis be precipitated, be extracted titanium with
Acid hydrolysis solution afterwards uses 13%P204,7%TBP and 80% kerosene as extractant, the scandium in extraction solution, the solution after extracting scandium
Ammonium hydroxide is added to neutralize, makees extractant with 19%P204,8%TBP and 73% kerosene and vanadium is obtained by extraction.
There are red mud alkalinity to restrict when red mud is as general raw material of industry whole utilization, product price is low, income is poor etc.
Problem；The method for extracting valuable element respectively has that processing technological flow is too long, wastewater flow rate is big, tailings is unable to get benefit mostly again
The problems such as using." a method of consumption red mud " (application number: CN201110275030.X) of the inventions such as Zhang Tingan is by Bayer process
Red mud is mixed with white lime, and after carrying out calcification dealkalize, CO is passed through into container2Obtain main component be calcium silicates, calcium carbonate with
And the carbide slag of aluminium hydroxide, aluminium hydroxide finally is extracted using sodium hydroxide solution or sodium aluminate solution, is made the transition by calcification
Change the structure and composition of red mud with carbonization transformation, to obtain calcification-carbonization with calcium silicates and calcium carbonate for main object phase
Red mud.
Summary of the invention:
It is an object of the present invention to the better comprehensive utilizations for realizing red mud, provide a kind of calcification-carbonization iron red mud time
The method for receiving iron and tailings cement, this method are complete using gaseous reducing agent using calcification-carbonization treatment iron red mud as raw material
Iron in full calcification-carbonization red mud, liquid slag adjust composition at high temperature and are directly becoming clinker through cooling, broken, grinding,
Handling without scorification for red mud is realized in the recycling for realizing iron in calcification-carbonization iron red mud.
To achieve the above object, the invention adopts the following technical scheme:
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement, comprising the following steps:
(1) calcification-carbonization iron red mud and slag former mixing are ground, forms mixture, vortex stirring is arrived in directly blowing
Melting and reducing high temperature furnace swirl center, and be rolled into molten bath, in which: the slag former is CaO and CaF2Mixture,
CaO is 1.0~1.4 additions, CaF by mixture basicity2Quality is added by the 10~30% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1300~1600 DEG C of temperature, while being passed through gaseous reducing agent, reduction 10~
60min；Obtain reduction molten iron and liquid slag, wherein the mixing speed is 120~150r/min, the gaseous reduction
Agent addition quality presses 1.2~1.5 times of additions that iron in mixture is restored to required theoretical value quality completely；
(3) reduction molten iron and the liquid slag layering obtained, and continuous overflow separation is carried out, obtain molten iron and liquid slag；
(4) ferrochrome is added in molten iron, manganese iron is directly smelted into wear resistant cast iron product；
(5) liquid slag adjusts composition in smelting furnace and complies with cement requirement；
(6) liquid slag is directly becoming clinker through cooling, broken, grinding, and the type of cooling is using air cooling or with furnace
It is cooling.
Include in the step (1), in calcification-carbonization iron red mud component and mass percentage be TFe 20~
40%, Al2O38~12%, SiO25~20%, A/S 0.2~0.9, Na2O 0.1~1.0%, H2O 5~20%.
In the step (1), calcification-carbonization iron red mud is previously dried dehydration, after forming dry red mud,
Again with slag former mixing, wherein drying temperature is 150~200 DEG C, and dry red mud moisture content is 1% or less.
In the step (1), calcification-carbonization iron red mud and slag former mixing are ground to 0.2mm and tail over 1~4%.
In the step (1), (1) method calculates basicity as the following formula:
In formula (1), mCaO is the quality of calcium oxide in mixture, mAl2O3For the quality of aluminium oxide in mixture, mSiO2
For the quality of silica in mixture.
In the step (2), the agitating paddle for stirring use is equipped with pipeline, and the gaseous reducing agent is blown from molten bath bottom
Enter or is blown into along agitating paddle pipeline.
In the step (3), gaseous reducing agent is the mixing of one or more of water-gas, hydrogen or natural gas, when
When for a variety of mixing, mixing ratio is any ratio.
In the method, the recovery rate of iron is up to 95% or more, and red mud utilization rate is up to 100%.
Compared with prior art, the features of the present invention and beneficial effect are:
(1) calcification-carbonization iron red mud that raw material uses in the method for the present invention belongs to the low aluminium red mud of low alkali, eliminates red mud
Limitation of the middle alkali to manufacture of cement, can increase red mud calcining cement clinker adds dosage.
(2) liberation degree of minerals of Copper component is high in calcification of the invention-carbonization iron red mud, is conducive to reduction process iron
It extracts, the recovery rate of iron is up to 95% or more.
(3) method of the invention uses vortex stirring melting and reducing, and raw material does not have to sintering, can directly enter furnace reduction.Molten bath
Middle reduction process promotes mass transport process, reduction kinetics sufficient condition using stirring and gaseous reducing agent.
(4) restored to obtain that ferrochrome is added in molten iron, manganese iron is directly smelted and produced at wear resistant cast iron using method of the invention
Product improve added value；
(5) vortex stirring is directly added into powder composition regulation to the tailings that the method for the present invention obtains at high temperature, is entirely used for
Clinker is produced, red mud utilization rate is up to 100%.
Detailed description of the invention:
Fig. 1 is the method and process flow diagram that calcification of the invention-carbonization iron red mud recycles iron and tailings cement.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
The method and process flow diagram of the calcification of following embodiment-carbonization iron red mud recycling iron and tailings cement is such as
Shown in Fig. 1.
Calcification described in following embodiment-carbonization iron red mud refer to by patent of invention " a method of consumption red mud
Method disclosed in (application number: CN201110275030.X) " changes the structure and group of red mud through calcification transition and carbonization transformation
At, obtain be with calcium silicates and calcium carbonate main object phase calcification-carbonization red mud.
Vortex stirring reduction in following embodiment refers to a kind of invention " vortex stirring method for melting reduction iron making
(CN106435080A) " method disclosed in, related vortex stirring melting and reducing high temperature furnace are the equipment that this method uses, shape
At vortex stirring melting high temperature furnace whirlpool ratio of height to diameter be 0.5-2.5.
Temperature when calcification-carbonization high-speed rail is red dry in following embodiment is 150~200 DEG C.
Liquid slag adjustment component is that calcareous raw material, siliceous raw material and/or ferriferous raw material is added in following embodiment.Calcareous original
Material selects at least one of lime stone, carbide slag；Siliceous raw material select kaolin, clay, flyash, in mine tailings at least
It is a kind of；Ferriferous raw material selects at least one of iron red mud, scum, steel slag.
Embodiment 1
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement, comprising the following steps:
It include component and mass percentage in raw material calcification-carbonization iron red mud are as follows: TFe content is in 30%, Al2O3Contain
Amount is in 12%, SiO2Content is in 20%, Na2O content is in 0.5%, H2O content 10%；
(1) calcification-carbonization iron red mud is dehydrated to moisture content 1% hereinafter, red mud after being dried, after drying
Red mud and slag former mixing are ground to 0.2mm and tail over 4%, form mixture, by mixture without sintering directly blowing to vortex
Stirring melting and reducing high temperature furnace swirl center is simultaneously rolled into molten bath, and slag former is CaO and CaF2Mixture, CaO is by mixed
Closing material basicity is 1.4 additions, CaF2Quality is added by the 20% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1600 DEG C of temperature, while being blown into water-gas from molten bath bottom, is vortexed
Stirring reduction reduction 10min, 1.2 times of additions of theoretical value quality needed for water-gas addition quality is restored completely by iron in raw material,
Mixing speed 120r/min obtains reduction molten iron and liquid slag；
(3) the reduction molten iron and liquid slag obtained is layered and carries out continuous overflow separation, obtains molten iron and ferrochrome, manganese iron is added
It directly smelts into wear resistant cast iron product, the rate of recovery of iron is 95%；Ferrochrome is added in molten iron, manganese iron is directly smelted into ISO21988/
JN/HBW555Cr13 trade mark wear resistant cast iron, it is 1.2% that Cr content, which is 13%, Mn content, in wear resistant cast iron；
(4) calcareous, siliceous, ferriferous raw material adjustment is added in smelting furnace and forms after complying with cement requirement for liquid slag,
It is air-cooled to room temperature, broken, grinding is directly becoming clinker, CaO, SiO in clinker2、Al2O3、Fe2O3Content be respectively
64%, 20%, 6%, 2.5%, meet the component requirements of clinker.
Embodiment 2
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement, comprising the following steps:
It include component and mass percentage in raw material calcification-carbonization iron red mud are as follows: TFe content is in 30%, Al2O3Contain
Amount is in 12%, SiO2Content is in 20%, Na2O content is in 0.5%, H2O content 10%；
(1) calcification-carbonization iron red mud is dehydrated to moisture content 1% hereinafter, red mud after being dried, after drying
Red mud and slag former mixing are ground to 0.2mm and tail over 1%, form mixture, by mixture without sintering directly blowing to vortex
Stirring melting and reducing high temperature furnace swirl center is simultaneously rolled into molten bath, and slag former is CaO and CaF2Mixture, CaO is by mixed
Closing material basicity is 1.0 additions, CaF2Quality is added by the 30% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1300 DEG C of temperature, while being blown into hydrogen reducing 60min from molten bath bottom,
1.5 times of additions of theoretical value quality needed for hydrogen is restored completely by iron in raw material, mixing speed 150r/min obtain reduction molten iron
And liquid slag；
(3) the reduction molten iron and liquid slag obtained is layered and carries out continuous overflow separation, obtains molten iron and ferrochrome, manganese iron is added
It directly smelts into wear resistant cast iron product, the rate of recovery of iron is 90%；Ferrochrome is added in molten iron, manganese iron is directly smelted into ISO21988/
JN/HBW555Cr13 trade mark wear resistant cast iron, it is 1.4% that Cr content, which is 11%, Mn content, in wear resistant cast iron；
(4) calcareous, siliceous, ferriferous raw material adjustment composition is added in vortex stirring high temperature furnace and complies with cement for liquid slag
After it is required that, it is air-cooled to room temperature, broken, grinding is directly becoming clinker, CaO, SiO in clinker2、Al2O3、Fe2O3Content point
Not Wei 62%, 24%, 6%, 3%, meet the component requirements of clinker.
Embodiment 3
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement, comprising the following steps:
It include component and mass percentage in raw material calcification-carbonization iron red mud are as follows: TFe content is in 20%, Al2O3Contain
Amount is in 8%, SiO2Content is in 12%, Na2O content is in 0.4%, H2O content 13%；
(1) calcification-carbonization iron red mud is dehydrated to moisture content 1% hereinafter, red mud after being dried, after drying
Red mud and slag former mixing are ground to 0.2mm and tail over 2%, form mixture, by mixture without sintering directly blowing to vortex
Stirring melting and reducing high temperature furnace swirl center is simultaneously rolled into molten bath, and slag former is CaO and CaF2Mixture, CaO is by mixed
Closing material basicity is 1.2 additions, CaF2Quality is added by the 10% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1600 DEG C of temperature, while being blown into natural gas reduction from molten bath bottom
10min, mixing speed 150r/min, 1.5 times of additions of theoretical value quality needed for natural gas is restored completely by iron in raw material, obtain
Restore molten iron and liquid slag；
(3) the reduction molten iron and liquid slag obtained is layered and carries out continuous overflow separation, obtains molten iron and ferrochrome, manganese iron is added
It directly smelts into wear resistant cast iron product, the rate of recovery of iron is 91%；Ferrochrome is added in molten iron, manganese iron is directly smelted into ISO21988/
JN/HBW555Cr13 trade mark wear resistant cast iron, it is 1.1% that Cr content, which is 12%, Mn content, in wear resistant cast iron；
(4) calcareous, siliceous, ferriferous raw material adjustment composition is added in vortex stirring high temperature furnace and complies with cement for liquid slag
After it is required that, it is air-cooled to room temperature, broken, grinding is directly becoming clinker, CaO, SiO in clinker2、Al2O3、Fe2O3Content point
Not Wei 63%, 23%, 4.8%, 3.2%, meet the component requirements of clinker.
Embodiment 4
A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement, comprising the following steps:
It include component and mass percentage in raw material calcification-carbonization iron red mud are as follows: TFe content is in 30%, Al2O3Contain
Amount is in 12%, SiO2Content is in 20%, Na2O content is in 0.5%, H2O content 10%；
(1) calcification-carbonization iron red mud is dehydrated to moisture content 1% hereinafter, red mud after being dried, after drying
Red mud and slag former mixing are ground to 0.2mm and tail over 3%, form mixture, by mixture without sintering directly blowing to vortex
Stirring melting and reducing high temperature furnace swirl center is simultaneously rolled into molten bath, and slag former is CaO and CaF2Mixture, CaO is by mixed
Closing material basicity is 1.2 additions, CaF2Quality is added by the 30% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1500 DEG C of temperature, while being blown into water-gas reduction along agitating paddle pipeline
20min, 1.5 times of additions of theoretical value quality needed for water-gas is restored completely by iron in raw material, mixing speed 150r/min are obtained
Restore molten iron and liquid slag；
(3) the reduction molten iron and liquid slag obtained is layered and carries out continuous overflow separation, obtains molten iron and ferrochrome, manganese iron is added
It directly smelts into wear resistant cast iron product, the rate of recovery of iron is 94%；Ferrochrome is added in molten iron, manganese iron is directly smelted into ISO21988/
JN/HBW555Cr13 trade mark wear resistant cast iron, it is 1.3% that Cr content, which is 12%, Mn content, in wear resistant cast iron；
(4) calcareous, siliceous, ferriferous raw material adjustment composition is added in vortex stirring high temperature furnace and complies with cement for liquid slag
After it is required that, it is air-cooled to room temperature, broken, grinding is directly becoming clinker, CaO, SiO in clinker2、Al2O3、Fe2O3Content point
Not Wei 63%, 23%, 5%, 3%, meet the component requirements of clinker.
Claims (8)
1. the method for a kind of calcification-carbonization iron red mud recycling iron and tailings cement, which comprises the following steps:
(1) calcification-carbonization iron red mud and slag former mixing are ground, forms mixture, directly blowing to vortex stirring melts
High temperature furnace swirl center is restored, and is rolled into molten bath, in which: the slag former is CaO and CaF2Mixture, CaO
It is 1.0~1.4 additions, CaF by mixture basicity2Quality is added by the 10~30% of CaO mass；
(2) vortex stirring is carried out in the molten bath of 1300~1600 DEG C of temperature, while being passed through gaseous reducing agent, reduction 10~
60min；Obtain reduction molten iron and liquid slag, wherein the mixing speed is 120~150r/min, the gaseous reduction
Agent addition quality presses 1.2~1.5 times of additions that iron in mixture is restored to required theoretical value quality completely；
(3) reduction molten iron and the liquid slag layering obtained, and continuous overflow separation is carried out, obtain molten iron and liquid slag；
(4) ferrochrome is added in molten iron, manganese iron is directly smelted into wear resistant cast iron product；
(5) liquid slag adjusts composition in smelting furnace and complies with cement requirement；
(6) liquid slag is directly becoming clinker through cooling, broken, grinding, and the type of cooling is using air cooling or furnace cooling.
2. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In, it include component and mass percentage in the step (1), in calcification-carbonization iron red mud is TFe 20~40%,
Al2O38~12%, SiO25~20%, A/S 0.2~0.9, Na2O 0.1~1.0%, H2O 5~20%.
3. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In, in the step (1), calcification-carbonization iron red mud is previously dried dehydration, after forming dry red mud, then with
Slag former mixing, wherein drying temperature is 150~200 DEG C, and dry red mud moisture content is 1% or less.
4. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In in the step (1), calcification-carbonization iron red mud and slag former mixing are ground to 0.2mm and tail over 1~4%.
5. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In in the step (1), in the step (1), (1) method calculates basicity as the following formula:
6. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In in the step (1), in the step (2), the agitating paddle for stirring use is equipped with pipeline, the gaseous reducing agent
It is blown into from molten bath bottom or is blown into along agitating paddle pipeline.
7. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In, in the step (1), in the step (3), gaseous reducing agent be one of water-gas, hydrogen or natural gas or
Several mixing, when for a variety of mixing, mixing ratio is any ratio.
8. the method for calcification according to claim 1-carbonization iron red mud recycling iron and tailings cement, feature exist
In in the step (1), in the method, the recovery rate of iron is up to 95% or more, and red mud utilization rate is up to 100%.
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| CN201910290636.7A CN110055365A (en) | 2019-04-11 | 2019-04-11 | A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement |
| PCT/CN2019/090839 WO2020206831A1 (en) | 2019-04-11 | 2019-06-12 | Calcified-carbonized high-iron red mud recycling iron and tailings cementation method |
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| CN201910290636.7A CN110055365A (en) | 2019-04-11 | 2019-04-11 | A kind of method that calcification-carbonization iron red mud recycles iron and tailings cement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113174456A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Comprehensive utilization method for smelting reduction of high-iron red mud by bottom-top combined blowing |
| CN113174455A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Comprehensive utilization method for smelting reduction of high-iron red mud by side-top combined blowing |
| CN113174457A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Side-top composite blowing smelting reduction furnace for treating high-iron red mud |
| CN113562770A (en) * | 2021-07-26 | 2021-10-29 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for recycling iron and sodium resources in red mud in gradient manner and fully utilizing tailings |
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| CN113174456A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Comprehensive utilization method for smelting reduction of high-iron red mud by bottom-top combined blowing |
| CN113174455A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Comprehensive utilization method for smelting reduction of high-iron red mud by side-top combined blowing |
| CN113174457A (en) * | 2021-04-28 | 2021-07-27 | 东北大学 | Side-top composite blowing smelting reduction furnace for treating high-iron red mud |
| WO2022227184A1 (en) * | 2021-04-28 | 2022-11-03 | 东北大学 | Comprehensive utilization method for bottom-top composite blowing smelting reduction of high-iron red mud |
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| CN113562770A (en) * | 2021-07-26 | 2021-10-29 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for recycling iron and sodium resources in red mud in gradient manner and fully utilizing tailings |
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