CN110199037A - For producing the furnace charge (embodiment) of iron ore pellet - Google Patents
For producing the furnace charge (embodiment) of iron ore pellet Download PDFInfo
- Publication number
- CN110199037A CN110199037A CN201780083142.0A CN201780083142A CN110199037A CN 110199037 A CN110199037 A CN 110199037A CN 201780083142 A CN201780083142 A CN 201780083142A CN 110199037 A CN110199037 A CN 110199037A
- Authority
- CN
- China
- Prior art keywords
- iron ore
- manganese
- furnace charge
- lime stone
- pelletizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Field the present invention relates to production for the iron ore pellet of blast furnace process.In the first embodiment, furnace charge includes iron ore concentrate and the lime stone containing manganese as adhesive and fluxing agent, and the ratio of charging component is as follows in terms of weight %: 1.0-5.0 manganese lime stone；And the iron ore concentrate of surplus.In a second embodiment, furnace charge includes iron ore concentrate, the bauxite as modifying agent and the lime stone containing manganese as adhesive and fluxing agent, and the ratio of charging component is as follows in terms of weight %: 1.0-3.5 lime stone containing manganese；1.2-1.5 modified additive；And the iron ore concentrate of surplus.The present invention improves the intensity of green pellets and agglomerates of sintered pellets, maintains high iron content, reduces softening-melting interval of pelletizing in blast furnace, and simplifies the production of iron ore pellets.
Description
Field the present invention relates to production for the iron ore pellet of blast furnace process.
There are the various compositions of the furnace charge of the pelletizing for blast furnace process.In the production of fluxing pelletizing, furnace charge is by iron
Concentrate, bentonite and fluxing agent (lime stone, chalk or dolomite) composition.
For example, according to USSR author's certificate the 692879th, it is known that a kind of method, in barren rock by containing 4-10%
The concentrate of silica introduces magnesia for the furnace charge to provide the amount of the ratio of CaO:MgO=1.5-3.9 to produce pelletizing
It melts to generate the CaO/SiO of 0.5-1.32Ratio.After sintering, carry out being cooled to 700-900 with the speed of 120-240 DEG C/min
DEG C temperature.
The shortcomings that this Batch compositions, is high basicity, and along with the reduction of iron content in pelletizing and pelletizing
The formation of glass in structure, it reduce their intensity.
The immediate technology of result of technical essential relevant to the furnace charge in claimed first embodiment and realization
Scheme (immediate approximation is the sample in first embodiment) is to be used for according to USSR inventors certificate the 800200th
The furnace charge of pelletizing is produced, it includes iron ore concentrates and the adhesive in the form of limy material.In order to reduce metallurgical processing at
This, which contains the chalk plaster of the granule content of the 2-0 micron with 20-80% as limy material, with
Lower component ratio (%): chalk plaster 3-7, iron ore concentrate --- surplus.
The shortcomings that this scheme, is the high SiO in plaster2Content, it reduce the iron content in pelletizing, raw material pelletizings
Intensity is low and softening-melting temperature range of the pelletizing described in blast furnace is wide.
The immediate skill of technical essential relevant to the furnace charge in claimed second embodiment and the result of realization
Art scheme (immediate approximation is the sample in second embodiment) is the system according to Russian Federation patent the 2202632nd
It is ready for use on the pelletizing to metallize in shaft unit and the then furnace charge of hot pressing, which includes iron ore materials, bentonite, stone
Lime stone and bauxite, component ratio are following (weight %): the summation of bentonite and lime stone is 0.5-1.0；Bauxite ---
0.4-1.1；Iron ore materials --- surplus.
The shortcomings that Batch compositions, is that the basicity value of pelletizing is lower, which dictates that in blast furnace softening-melting interval compared with
It is wide.
It is a kind of for producing the furnace charge of iron ore pellet it is an object of the invention to develop, eliminate lacking for known furnace charge
Point.
The technical effect that the present invention is realized improves the intensity of green pellets and agglomerates of sintered pellets, and the iron for maintaining high contains
Amount, reduces softening-melting interval of pelletizing in blast furnace, and simplify the production of iron ore pellets.
The technical effect is due to the fact that realization, in the first embodiment in accordance with the invention comprising iron essence
In the furnace charge for obtaining iron ore pellet of mine, fluxing agent and adhesive, the furnace charge includes to be intended as adhesive and help
The manganese lime stone of flux, while the ratio of the component of the furnace charge is (weight %):
Manganese lime stone --- (1.0-5.0)；
Iron ore concentrate --- surplus.
Manganese content in manganese lime stone is at least 6%.
It is used to produce iron ore comprising iron ore concentrate, fluxing agent and adhesive in second embodiment according to the present invention
In the furnace charge of pelletizing, the furnace charge includes to be intended as the bauxite of modified additive and be intended as adhesive and fluxing agent
Manganese lime stone, while the ratio of the component of the furnace charge be (weight %):
Manganese lime stone --- (1.0-3.5)；
Modified additive --- (1.2-1.5)；
Iron ore concentrate --- surplus.
Manganese content in manganese lime stone is at least 6%.
When using furnace charge in two kinds of embodiments, due to the SiO in manganese lime stone2Content is lower and realizes the pelletizing
In high iron content holding.
The raising of the intensity of the raw material pelletizing in furnace charge in two kinds of embodiments is water-physical property due to manganese lime stone
Raising caused by.
Content by improving manganese oxide realizes the raising of the intensity of agglomerates of sintered pellets in the furnace charge in first embodiment
(when in the content of manganese the lime stone in the first embodiment range).
The lower limit of the content of manganese lime stone, i.e., 1.0% in furnace charge in first embodiment are to depend on it to be capable of providing height
The green pellets of intensity and the minimum of agglomerates of sintered pellets.When the content of the manganese lime stone in the furnace charge is lower than 1.0%, green-ball
The level for the intensity that the intensity of group and agglomerates of sintered pellets provides when can fall below using chalk plaster.Manganese in the furnace charge
When the content of lime stone is less than 1%, influence of the manganese oxide to softening and melting temperature is weak.
The upper limit of manganese limestone content, i.e., 5% in furnace charge in first embodiment are to depend on iron content in the pelletizing
Reduction and agglomerates of sintered pellets intensity.When the content of the manganese lime stone in the furnace charge is greater than 5.0%, the agglomerates of sintered pellets
Intensity can be reduced due to forming glass in its structure.Formation glass also results in the reduction of softening temperature and softening-is melted
Melt the increase of range.
In furnace charge according to first embodiment, since manganese oxide is (when the content of manganese lime stone is according to first embodiment
Furnace charge the range in when) realize pelletizing to the softening of pelletizing in blast furnace and the influence of melting temperature softening-it is molten
The reduction for the temperature range melted.
Due to the А l in pelletizing2O3Content it is higher and manganese oxide is to the softening of pelletizing in blast furnace and the shadow of melting temperature
It rings and realizes in furnace charge according to the second embodiment, softening-fusion range reduction of pelletizing in blast furnace.
By being modified А l with bauxite2O3And softening-the fusion range for realizing pelletizing in blast furnace further decreases.
The increase of the intensity of green pellets is water-physical property due to manganese lime stone in furnace charge according to the second embodiment
Caused by raising, and the intensity of the agglomerates of sintered pellets increases (when the content of manganese lime stone is according to the second embodiment described
When in range) it is the increase simultaneously because the content of manganese oxide, and due to manganese lime stone and aluminium oxide Al2O3Interaction
Caused by the formation of the structure of middle brownmillerite mineral.
The lower limit of manganese limestone content, i.e., 1.0% in furnace charge in second embodiment, be depend on its be capable of providing it is high-strength
The green pellets of degree and the minimum of agglomerates of sintered pellets.When the content of the manganese lime stone in the furnace charge is lower than 1.0%, green pellets
The level of the intensity provided when can fall below with the intensity of agglomerates of sintered pellets using bentonite.
In second embodiment in furnace charge manganese limestone content the upper limit, i.e., 3.5%, be depend on the pelletizing in iron content
Reduction and agglomerates of sintered pellets intensity.
When the content of the manganese lime stone in the furnace charge is greater than 3.5%, the intensity of the agglomerates of sintered pellets can due to
Glass is formed in its structure and is reduced.
The lower limit of alumina mineral content, i.e., 1.2% in furnace charge according to the second embodiment are to depend on it to generate to blast furnace
In softening and melting temperature modified effect minimum.When alumina mineral content in the mixture is lower than 1.2%, Al2O3
The influence reduced to softening and melting temperature is weak.
The upper limit of alumina mineral content, i.e., 1.5% in furnace charge in second embodiment, the drop depending on iron content in pelletizing
It is low.When the alumina mineral content in the furnace charge is greater than 1.5%, the iron content in the pelletizing can be reduced.
Embodiment
The test furnace charge of iron ore pellet carries out in laboratory conditions.Using iron ore concentrate as iron ore materials,
It is given in Table 1 its chemical composition.Its composition for also giving fluxing agent and bauxite.By bentonite, fluxing agent and bauxite
It is ground to the granularity less than 0.072mm in the ball mill, is injected in the concentrate with scheduled amount, mixes, wetting, then in drum
The pelletizing of granularity of the production with 10-15mm in formula pelletizer.The strong of raw material pelletizing is tested by falling from the height of 30cm
Degree.It is sintered in the Muffle furnace with programmable heat tupe under 1300 DEG C of maximum temperature.In roasting and cooling
Later, the crushing strength that pelletizing is tested according to GOST 24765-81, measured according to GOST 26517-85 chemical composition and
Softening-melting temperature.
In order to compare, according to the first and second embodiments, the furnace charge of sample is tested respectively.Test result such as table 2
It is shown.
Acquired results analysis shows, claimed in two kinds of embodiments for produce iron ore pellet furnace charge it is true
The realization of the target has been protected, i.e., has improved original while softening-melting interval in the iron content and reduction blast furnace for keeping high
The intensity of pellet group and agglomerates of sintered pellets.
Compared with corresponding sample, for obtain iron ore pellet two kinds of embodiments furnace charge by the intensity of raw material pelletizing
Fallen to improve to 3.5-5.0 times by 2.2 times and be fallen, the intensity of agglomerates of sintered pellets is improved by 250kg/ pelletizing to 313-510kg/ ball
Group, softening-melt temperature scope are reduced to 240-290 DEG C by 320 DEG C, high iron content are maintained in pelletizing.
Technology claimed can be implemented in the industry, and realize the technical effect.
The simplification of the furnace charge is due to the fact that: manganese lime stone is intended to be used as fluxing agent and adhesive (that is, not
Need to be used alone as this charging component of adhesive).
Since manganese lime stone uses natural material (manganese ore), it is characterised in that manganese content at least 6%.
The chemical composition of table 1, charging component, %
| Component | Fe | FeO | Fe2O3 | СаО | MgO | SiO2 | Аl2О3 | MnO | LOI |
| Iron ore concentrate | 67.49 | 28.70 | 64.52 | 0.22 | 0.51 | 5.50 | 0.19 | 0.03 | 0.27 |
| Bentonite | - | - | 1.50 | 1.00 | 0.50 | 60.00 | 36.90 | - | - |
| Manganese lime stone | 0.84 | - | 1.20 | 40.50 | 0.77 | 8.70 | 3.10 | 9.91 | 35.75 |
| Bauxite | 14.04 | - | 20.06 | 0.79 | 0.75 | 8.70 | 40.87 | - | 24.90 |
| Chalk plaster | 1.12 | - | 1.60 | 44.40 | 0.70 | 14.50 | 3.50 | - | 35.40 |
| Lime stone | 0.18 | - | 0.26 | 54.2 | 0.71 | 1.28 | 0.34 | 0.01 | 42.50 |
LOI- combustible loss
Table 2, test result
Claims (4)
1. the furnace charge comprising iron ore concentrate, fluxing agent and adhesive for obtaining iron ore pellet, which is characterized in that it includes meanings
Figure is used as the manganese lime stone of adhesive and fluxing agent, wherein the ratio of the component of mixture is as follows, weight %:
Manganese lime stone --- (1.0-5.0)；
Iron ore concentrate --- surplus.
2. furnace charge according to claim 1, which is characterized in that the manganese content in manganese lime stone is at least 6%.
3. the furnace charge comprising iron ore concentrate, fluxing agent and adhesive for producing iron ore pellet, which is characterized in that the furnace charge
Comprising being intended as the bauxite of modified additive and being intended as the manganese lime stone of adhesive and fluxing agent, while the furnace
The ratio of the component of material is weight %:
Manganese lime stone --- (1.0-3.5)；
Modified additive --- (1.2-1.5)；
Iron ore concentrate --- surplus.
4. furnace charge according to claim 3, which is characterized in that the manganese content in manganese lime stone is at least 6%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2016144588A RU2637850C1 (en) | 2016-11-14 | 2016-11-14 | Charge for producing iron ore pellets (versions) |
| PCT/RU2017/000855 WO2018088941A1 (en) | 2016-11-14 | 2017-11-17 | Charge for producing iron-ore pellets (variants) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110199037A true CN110199037A (en) | 2019-09-03 |
Family
ID=60581320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780083142.0A Pending CN110199037A (en) | 2016-11-14 | 2017-11-17 | For producing the furnace charge (embodiment) of iron ore pellet |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20200010922A1 (en) |
| EP (1) | EP3578672A4 (en) |
| CN (1) | CN110199037A (en) |
| BR (1) | BR112019014466A2 (en) |
| RU (1) | RU2637850C1 (en) |
| WO (1) | WO2018088941A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112430731A (en) * | 2020-05-28 | 2021-03-02 | 王彩杰 | Method for preparing alkaline pellets from high-silicon iron powder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2245930C1 (en) * | 2003-09-26 | 2005-02-10 | Научно-производственное внедренческое предприятие "ТОРЭКС" (НПВП "ТОРЭКС") | Batch for pellet production used in metallurgy |
| RU2465350C2 (en) * | 2010-05-11 | 2012-10-27 | Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (ОАО "ЕВРАЗ НТМК") | Agglomerated flux, charge, and method for its manufacture |
| CN106755653A (en) * | 2016-12-10 | 2017-05-31 | 东北大学 | A kind of method containing rare earth or the also original production of niobium slag metallurgy melting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU765383A2 (en) * | 1978-04-06 | 1980-09-23 | Научно-Исследовательский И Проектный Институт Обогащения И Механической Обработки Полезных Ископаемых "Уралмеханобр" | Method of producing oxidized pellets |
| SU800200A1 (en) * | 1978-12-26 | 1981-01-30 | Salykin Aleksej A | Charge for producing pellets |
| RU2202632C1 (en) * | 2001-08-08 | 2003-04-20 | Открытое акционерное общество "Лебединский горно-обогатительный комбинат" | Composition of burden to produce pellets for their metallization in plants of shaft type and subsequent hot briquetting of iron |
| ES2539977T3 (en) * | 2008-01-30 | 2015-07-07 | Nu-Iron Technology, Llc | Procedure and system to produce iron metal nuggets |
| RU2410447C1 (en) * | 2009-04-28 | 2011-01-27 | Открытое акционерное общество "Высокогорский горно-обогатительный комбинат" | Mix material for production of manganese-containing staflux |
-
2016
- 2016-11-14 RU RU2016144588A patent/RU2637850C1/en active
-
2017
- 2017-11-17 BR BR112019014466-8A patent/BR112019014466A2/en not_active Application Discontinuation
- 2017-11-17 EP EP17868869.3A patent/EP3578672A4/en not_active Withdrawn
- 2017-11-17 CN CN201780083142.0A patent/CN110199037A/en active Pending
- 2017-11-17 WO PCT/RU2017/000855 patent/WO2018088941A1/en unknown
-
2019
- 2019-07-17 US US16/514,708 patent/US20200010922A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2245930C1 (en) * | 2003-09-26 | 2005-02-10 | Научно-производственное внедренческое предприятие "ТОРЭКС" (НПВП "ТОРЭКС") | Batch for pellet production used in metallurgy |
| RU2465350C2 (en) * | 2010-05-11 | 2012-10-27 | Открытое акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (ОАО "ЕВРАЗ НТМК") | Agglomerated flux, charge, and method for its manufacture |
| CN106755653A (en) * | 2016-12-10 | 2017-05-31 | 东北大学 | A kind of method containing rare earth or the also original production of niobium slag metallurgy melting |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018088941A1 (en) | 2018-05-17 |
| RU2637850C1 (en) | 2017-12-07 |
| US20200010922A1 (en) | 2020-01-09 |
| BR112019014466A2 (en) | 2020-02-11 |
| EP3578672A4 (en) | 2020-09-02 |
| EP3578672A1 (en) | 2019-12-11 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190903 |