CN112048349B - Blast furnace coal powder injection combustion improver and preparation and use methods thereof - Google Patents

Blast furnace coal powder injection combustion improver and preparation and use methods thereof Download PDF

Info

Publication number
CN112048349B
CN112048349B CN202010938600.8A CN202010938600A CN112048349B CN 112048349 B CN112048349 B CN 112048349B CN 202010938600 A CN202010938600 A CN 202010938600A CN 112048349 B CN112048349 B CN 112048349B
Authority
CN
China
Prior art keywords
powder
coal
blast furnace
combustion improver
coal powder
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.)
Active
Application number
CN202010938600.8A
Other languages
Chinese (zh)
Other versions
CN112048349A (en
Inventor
张立国
韩子文
王亮
李仲
张伟
任伟
李金莲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN202010938600.8A priority Critical patent/CN112048349B/en
Publication of CN112048349A publication Critical patent/CN112048349A/en
Application granted granted Critical
Publication of CN112048349B publication Critical patent/CN112048349B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency

Abstract

The invention relates to a blast furnace coal powder injection combustion improver, which comprises the following components in percentage by mass: 40-80% of steel slag powder, 5-15% of iron oxide red, 5-15% of active iron powder and 10-30% of magnesite powder are put into a grinder to be ground for 30-60 min, and then taken out and put into a mixer to be mixed for 20-50 min to obtain a finished product. The proportion of the pulverized coal added is based on the physical properties of the coal for blowing and the requirement of the amount of the coal to be blown, and the content of volatile components in the mixed pulverized coal, the average particle size composition of the mixed pulverized coal and the amount of the coal to be blown are taken as basic reference data.

Description

Blast furnace coal powder injection combustion improver and preparation and use methods thereof
Technical Field
The invention relates to the technical field of metallurgical production, in particular to a blast furnace coal powder injection combustion improver and preparation and use methods thereof.
Background
Due to the advantages of economy, operability, maintainability and the like, the blast furnace iron making mode is one of the core technologies of the modern smelting process, and the importance of the blast furnace iron making mode in the aspect of pig iron smelting is self-evident. Meanwhile, the vessel for performing the reduction reaction as heat energy is at the lowest level of fuel consumption in different smelting processes because of its highest efficiency of heat energy utilization, resulting in the most prominent advantage of the blast furnace iron making process in comparison with other iron making processes in terms of economy. Under the modern blast furnace smelting process, the fuel composition of the blast furnace is mainly composed of furnace entering coke and coal powder for injection, and due to the characteristics of the coke blast furnace, the coke blast furnace plays a role of a framework in the furnace and a role of supporting furnace burden, so from the viewpoint of smooth smelting, the furnace entering coke needs to be maintained above a certain level. Therefore, in view of reducing the consumption of fuel (mainly from the economical point of view, the huge price difference exists between the coal powder and the coke), the optimization of the production efficiency and the great reduction of the fuel consumption are started from the aspect of injecting the coal powder for the modern blast furnace process.
In the production process of the blast furnace, due to the limitation of time and space, the burning zone of the pulverized coal injected into the furnace in front of the tuyere cannot be completely burnt, and especially under the condition of maintaining a high coal injection ratio, the larger the injection amount is, the absolute quantity of unburned pulverized coal is correspondingly increased, so that the utilization rate of the pulverized coal injected into the blast furnace is low. In the process, only a small amount of unburned coal powder is absorbed or further gasified in the smelting process, and can be effectively utilized. The presence of large amounts of unburned coal fines, in addition to indicating inefficient use of the coal fines in the furnace, will also have a significant adverse effect on the operation of the blast furnace. Therefore, in order to deal with the situation that the production of the blast furnace is not facilitated, the combustion in the pulverized coal furnace needs to be enhanced by taking measures such as oxygen-enriched air blowing, air temperature increasing or adding combustion improver and the like by fully utilizing external conditions, so that the influence of the combustion rate deterioration in the mixed pulverized coal furnace on the production of the blast furnace after the injected coal quantity is increased is reduced.
The combustion in the reinforced pulverized coal injection furnace is performed by a plurality of means, wherein a mode of adding a combustion improver is one of main measures, and the technology has been researched for many years at home and abroad, and the results are put on the production of boilers and blast furnaces to a certain extent. For the research and development of mainstream combustion-supporting agents in the current market, combustion-supporting agent products derived from the technology are not limited to the following classes: firstly, rare earth combustion improver is added, and the combustion rate of pulverized coal in a blast furnace can be improved after the rare earth combustion improver is added with mixed pulverized coal injected by the blast furnace by utilizing the combustion supporting effect of lanthanide elements in the rare earth, such as oxides of lanthanum, cerium and the like, so that the utilization effect is improved; secondly, manganese series oxide combustion improver releases a certain amount of oxygen through the decomposition of the substances at high temperature, thereby realizing the combustion supporting effect of the coal dust; thirdly, combustion improver of halogen substances, such as potassium chloride, sodium chloride and the like, is added, and at high temperature, the substances can accelerate the fracture of the connecting bonds between the pulverized coal, so that the combustion efficiency of the pulverized coal is improved; the combustion improver is also a combustion improver of substances such as active iron powder and the like, so that the combustion effect in the pulverized coal furnace is improved, and the core of the combustion improver is the enhanced pulverized coal combustion effect.
Because the steel craft product needs to be processed through a plurality of procedures, after each procedure is processed, almost each procedure can generate a large amount of secondary products due to the huge characteristic of the steel product yield. As a secondary product of a steel plant, the steel slag powder is one of main substances and is the residual substance after steel making of a converter or an electric furnace. The steel slag powder is mainly used for steel plants, and is prepared in a sintering process after a magnetic separation process, and then participates in the process production again, but the defects are obvious, namely the utilization effect is poor; for the external market, the method is mainly used for manufacturing low value-added products such as cement, bricks and the like, and the profit is low. It should be noted here that, because of the technological characteristics, the main components of the steel slag powder are iron and calcium oxide, and the substances have combustion supporting function, if the two components can be effectively combined to realize industrialized products, the combustion of the coal powder can be enhanced, the utilization efficiency of the coal powder in the furnace can be improved, secondary products can be reasonably utilized, precious coal resources can be saved, and the green manufacturing advocated by the state can be perfectly realized. For the secondary product steel slag powder of metallurgical enterprises, the secondary product steel slag powder of metallurgical enterprises is also used for processing and manufacturing some products with low added value (see Chinese patent 'application of steel slag deironing process and steel slag fine powder thereof' patent application No. CN1566010, 'steel slag composite micro powder and preparation method thereof' patent application No. CN102584042B, 'process for producing high-activity steel slag powder and inert mineral products by steel slag': CN106755650B, 'foamed asphalt steel slag mixture and preparation method thereof' patent application No. CN102964108B, 'method for preparing bricks by taking finely ground steel slag and steel slag particles as raw materials' patent application No. CN110790554A and the like), the technical process flow is simple, the deironing effect is good, if steel slag portland cement is prepared by fully mixing through a high-efficiency mixer, the produced cement meets the national standard requirements, and the technical problems of low early strength, poor stability and the like of the steel slag portland cement are solved, or the material can also partially replace natural aggregates such as sand, broken stones and the like, so that the material cost is further reduced, the material has better practicability, but the defect is obvious, namely the effective components in the material cannot be utilized, so that the added value of the product is low, and the material is irrelevant to the technical invention from the application perspective. For the blast furnace coal powder injection combustion improver, products and technologies are frequently found in the market (see Chinese patent 'blast furnace coal powder injection catalytic combustion improver and production process thereof' patent application No. CN1401747, 'combustion method of blast furnace coal powder injection' patent application No. CN1042238C, 'blast furnace coal powder injection catalytic combustion improver and use method thereof' patent application No. CN103013616B, 'blast furnace coal powder injection multifunctional additive and addition method thereof' patent application No. CN103266190A, 'blast furnace coal powder injection combustion improver and use method thereof' patent application No. CN104087692B, 'blast furnace coal powder injection combustion improver and application and device thereof' patent application No. CN103740433B, 'blast furnace coal powder injection combustion improver and preparation method and use thereof' patent application No. CN103451333B and the like), the technical invention realizes improved combustion characteristics of coal powder by adopting rare earth, manganese series, halogen family elements and other methods, the combustion improver can effectively improve the ratio of coal to blast furnace coal and the coke ratio, increase the yield, and reduce the addition cost, thereby effectively improving the comprehensive economic benefit of the coal injection of the furnace. In addition, although the method of the type 2003, 36, 3 and 37-39 can improve the combustion rate of the pulverized coal, the disadvantages are obvious, namely, expensive pulverized coal combustion improver needs to be purchased, the economic burden of an enterprise is increased, and the advantages of the resources of the enterprise cannot be fully utilized.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the blast furnace coal powder injection combustion improver, which improves the combustion effect of coal powder in the furnace and realizes the secondary utilization and circulation of resources.
In order to achieve the purpose, the invention adopts the following technical scheme:
the blast furnace coal powder injection combustion improver comprises the following components in percentage by mass: 40-80% of steel slag powder, 5-15% of iron oxide red, 5-15% of active iron powder and 10-30% of magnesite powder.
The steel slag powder is one or more of converter slag powder, electric furnace slag powder or refining slag powder.
The mass proportion of the steel slag powder with the granularity less than or equal to 3mm is more than or equal to 50 percent.
The mass content of magnesium oxide in the magnesite powder is more than or equal to 35 percent; the mass proportion of the magnesite powder with the granularity less than or equal to 3mm is more than or equal to 30 percent.
The preparation method of the blast furnace coal powder injection combustion improver comprises the steps of putting steel slag powder, iron oxide red, active iron powder and magnesite powder into a grinder to be ground for 30-60 min, taking out the ground steel slag powder, putting the ground steel slag powder, the active iron powder and the magnesite powder into a mixer to be mixed for 20-50 min, and obtaining a finished product.
The use method of the blast furnace coal powder injection combustion improver comprises the steps of putting the combustion improver into the coal powder injection, co-grinding and uniformly mixing, wherein the mixing proportion is determined according to the following formula:
Figure BDA0002672821900000031
in the formula:
PRBL is the proportion of combustion improver in the mixed coal powder;
Vadthe content of volatile components in the mixed coal powder is percent;
LDcoalthe part which is less than or equal to 0.074mm accounts for the whole mass proportion of the mixed coal powder,%;
PCI is the blast furnace coal injection amount, kg/t;
k1the value is a coefficient, and the value range is 1.27-1.35;
k2the value range is 0.011-0.016 for the coefficient;
k3is a coefficient, the value range is 125-139, and the dimension is
Figure BDA0002672821900000041
Compared with the prior art, the invention has the beneficial effects that:
the combustion improver for improving the combustion effect of the blast furnace coal for blowing is prepared by adopting secondary products of the smelting process of the iron and steel plant, such as steel slag powder, iron oxide red and the like, so that the combustion effect of the pulverized coal in the furnace can be improved, the utilization rate of the pulverized coal in the furnace can be improved, the secondary utilization circulation of resources can be realized, the application of high value-added products is realized, and the green manufacturing of blast furnace smelting is realized. The proportion of the pulverized coal added is based on the physical properties of the coal for blowing and the requirement of the amount of the coal to be blown, and the content of volatile components in the mixed pulverized coal, the average particle size composition of the mixed pulverized coal and the amount of the coal to be blown are taken as basic reference data.
Detailed Description
The invention is further illustrated by the following examples:
the following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.
The proportioning scheme of the combustion improver is shown in table 1;
table 1: mass proportion of%
Name of raw materials Example 1 Example 2 Example 3
Converter slag powder 30 35 25
Electric furnace slag powder 30 35 25
Iron oxide red 10 5 10
Active iron powder 5 10 10
Magnesite stone 25 15 30
The preparation method of the blast furnace coal powder injection combustion improver comprises the steps of putting steel slag powder, iron oxide red, active iron powder and magnesite powder into a grinder for grinding, taking out the ground steel slag powder, grinding the iron oxide red, active iron powder and magnesite powder, putting the ground steel slag powder into a mixer, and mixing to obtain a finished product.
The preparation process of the combustion improver is shown in the table 2;
table 2: preparation process of combustion improver
Figure BDA0002672821900000042
Figure BDA0002672821900000051
Example 1 method of using combustion improver to mix volatile components in pulverized coal according to physical properties of coal for injection and amount of coal for injectionThe amount, the average granularity composition of the mixed coal powder and the amount of the injected coal are used as basic reference data to determine the proportion of the combustion improver in the mixed coal powder and the addition proportion of the combustion improver
Figure BDA0002672821900000052
Wherein the values are shown in Table 3;
table 3:
item Numerical value
Volatile content V in mixed coal powderad，％ 21
The part less than or equal to 0.074mm accounts for the whole mass ratio LD of the mixed coal powdercoal，％ 72
Amount of coal injected PCI, kg/t 140
k1 1.27
k2 0.011
k3 125
The addition ratio of the combustion improver PRBL% 1.73
The 1.73% combustion improver is continuously put on the upper part of coal powder of a main coal conveying belt in the blast furnace coal injection process of an effective furnace volume 2580m3 of a certain iron and steel plant, the coal powder and the main coal conveying belt are uniformly mixed through powder preparation by a medium speed mill, and then the mixture is fluidized by an injection tank and conveyed by a pipeline, and the coal powder is injected into a blast furnace tuyere convolution area through a coal gun to participate in combustion and reduction reaction in a furnace.
The application effect of the blast furnace coal powder injection combustion improver is shown in table 4.
Table 4: effect of blast furnace application
Item The burning rate of the coal powder in the raceway% Utilization rate of coal powder in the furnace%
Without adding combustion improver 78.2 96.4
Adding combustion improver 80.1 97.3
Effect +2.1 +1.1
According to the method, the secondary products of the smelting process of the iron and steel plant, such as steel slag powder, iron oxide red and the like, are adopted to prepare the aid for improving the combustion effect of the coal for blast furnace injectionBurning agent, effective furnace volume 450m in certain iron and steel plant3After the blast furnace is applied, compared with the condition that the coal powder combustion improver is not added, the combustion rate of the mixed coal powder in the tuyere raceway can be improved by 2.1%, the utilization rate in the mixed coal powder furnace is improved by 1.1%, the secondary utilization circulation of resources can be realized, the application of high value-added products is realized, and the green manufacturing of blast furnace smelting is further realized.
Example 2 method of using combustion improver, according to the physical properties of coal for injection and the requirement of coal injection amount, the blending ratio of combustion improver in mixed coal powder and the addition ratio of combustion improver are determined by using the volatile content in mixed coal powder, the average particle size composition of mixed coal powder and the coal injection amount as basic reference data
Figure BDA0002672821900000061
The values in the formula are shown in Table 5;
table 5:
item Numerical value
Volatile content V in mixed coal powderad，％ 23
The part less than or equal to 0.074mm accounts for the whole mass ratio LD of the mixed coal powdercoal，％ 68
Amount of coal injected PCI, kg/t 145
k1 1.30
k2 0.013
k3 130
The addition ratio of the combustion improver PRBL% 1.98
The combustion improver is continuously put into an effective furnace volume of 3200m of a certain iron and steel plant according to the proportion of 1.98 percent3In the blast furnace coal injection process, the upper part of coal powder of a main coal conveying belt is uniformly mixed by milling powder through a medium speed mill, then the mixture is fluidized by an injection tank and conveyed by a pipeline, and the coal powder is injected into a blast furnace tuyere convolution area through a coal gun to participate in combustion and reduction reaction in a furnace.
The application effect of the blast furnace coal powder injection combustion improver is shown in table 6.
Table 6:
item The burning rate of the coal powder in the raceway% Utilization rate of coal powder in the furnace%
Without adding combustion improver 79.3 96.6
Adding combustion improver 80.4 97.8
Effect +1.1 +1.2
According to the method, the combustion improver for improving the combustion effect of the blast furnace blowing coal is prepared by adopting secondary products of the smelting process of the iron and steel plant, such as steel slag powder, iron oxide red and the like, and the effective furnace volume in a certain iron and steel plant is 1280m3After the blast furnace is applied, compared with the condition that the coal powder combustion improver is not added, the combustion rate of the mixed coal powder in the tuyere raceway can be improved by 1.1%, the utilization rate in the mixed coal powder furnace is improved by 1.2%, the secondary utilization circulation of resources can be realized, the application of high value-added products is realized, and the green manufacturing of blast furnace smelting is further realized.
Example 3 method of using combustion improver, according to the physical properties of coal for injection and the requirement of coal injection amount, the blending ratio of combustion improver in mixed coal powder and the addition ratio of combustion improver are determined by using the volatile content in mixed coal powder, the average particle size composition of mixed coal powder and the coal injection amount as basic reference data
Figure BDA0002672821900000071
The values in the formula are shown in Table 7;
table 7:
item Numerical value
Volatile content V in mixed coal powderad，％ 19
The part less than or equal to 0.074mm accounts for the whole mass of the mixed coal powderQuantity ratio LDcoal，％ 74
Amount of coal injected PCI, kg/t 160
k1 1.34
k2 0.015
k3 135
The addition ratio of the combustion improver PRBL% 1.75
The combustion improver is continuously put into an effective furnace volume 4038m of a certain iron and steel plant according to the proportion of 1.75 percent3In the blast furnace coal injection process, the upper part of coal powder of a main coal conveying belt is uniformly mixed by milling powder through a medium speed mill, then the mixture is fluidized by an injection tank and conveyed by a pipeline, and the coal powder is injected into a blast furnace tuyere convolution area through a coal gun to participate in combustion and reduction reaction in a furnace.
The application effect of the blast furnace coal powder injection combustion improver is shown in Table 8.
Table 8:
item The burning rate of the coal powder in the raceway% Utilization rate of coal powder in the furnace%
Without adding combustion improver 80.3 96.5
Adding combustion improver 81.9 97.7
Effect +1.6 +1.2
According to the method, the combustion improver for improving the combustion effect of the blast furnace blowing coal is prepared by adopting secondary products of the smelting process of the iron and steel plant, such as steel slag powder, iron oxide red and the like, and the effective furnace volume 4038m in a certain iron and steel plant3After the blast furnace is applied, compared with the condition that the coal powder combustion improver is not added, the combustion rate of the mixed coal powder in the tuyere raceway can be improved by 1.6%, the utilization rate in the mixed coal powder furnace is improved by 1.2%, the secondary utilization circulation of resources can be realized, the application of high value-added products is realized, and the green manufacturing of blast furnace smelting is further realized.

Claims (4)

1. The use method of the blast furnace coal powder injection combustion improver is characterized in that the blast furnace coal powder injection combustion improver comprises the following components in percentage by mass: 40-80% of steel slag powder, 5-15% of iron oxide red, 5-15% of active iron powder and 10-30% of magnesite powder; adding a combustion improver into the injected coal powder, co-grinding and uniformly mixing, wherein the mixing proportion is determined according to the following formula:
Figure FDA0003212931870000011
in the formula:
PRBL is the proportion of combustion improver in the mixed coal powder;
Vadthe content of volatile components in the mixed coal powder is percent;
LDcoalthe part which is less than or equal to 0.074mm accounts for the whole mass proportion of the mixed coal powder,%;
PCI is the blast furnace coal injection amount, kg/t;
k1the value range is 1.27-1.35;
k2the value range is 0.011-0.016 for the coefficient;
k3is a coefficient, the value range is 125-139, and the dimension is
Figure DEST_PATH_IMAGE002
。
2. The use method of the combustion improver for the pulverized coal injected into the blast furnace as claimed in claim 1, wherein the steel slag powder is one or more of converter slag powder, electric furnace slag powder or refining slag powder.
3. The use method of the blast furnace pulverized coal injection combustion improver as claimed in claim 1, wherein the mass proportion of the steel slag powder with the particle size of less than or equal to 3mm is more than or equal to 50%.
4. The use method of the blast furnace pulverized coal injection combustion improver as claimed in claim 1, wherein the magnesia powder contains more than or equal to 35% by mass; the mass proportion of the magnesite powder with the granularity less than or equal to 3mm is more than or equal to 30 percent.
CN202010938600.8A 2020-09-09 2020-09-09 Blast furnace coal powder injection combustion improver and preparation and use methods thereof Active CN112048349B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010938600.8A CN112048349B (en) 2020-09-09 2020-09-09 Blast furnace coal powder injection combustion improver and preparation and use methods thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010938600.8A CN112048349B (en) 2020-09-09 2020-09-09 Blast furnace coal powder injection combustion improver and preparation and use methods thereof

Publications (2)

Publication Number Publication Date
CN112048349A CN112048349A (en) 2020-12-08
CN112048349B true CN112048349B (en) 2021-10-22

Family

ID=73611315

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010938600.8A Active CN112048349B (en) 2020-09-09 2020-09-09 Blast furnace coal powder injection combustion improver and preparation and use methods thereof

Country Status (1)

Country Link
CN (1) CN112048349B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113416806B (en) * 2021-05-25 2022-11-18 鞍钢股份有限公司 Fusing agent for improving melting property of coal ash for blast furnace blowing and using method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256500A (en) * 1978-04-24 1981-03-17 The Partners Limited Pozzolan cement compositions
US8906336B2 (en) * 2000-09-15 2014-12-09 Siddhartha Gaur Blast furnace metallurgical coal substitute products and method
CN101445848B (en) * 2008-12-22 2010-08-11 莱芜钢铁集团有限公司 Process and device for continuous steelmaking from ferriferous material
CN101696460B (en) * 2009-05-25 2010-12-29 莱芜钢铁集团有限公司 Process and device for dual continuous steel making with iron-containing material rotary hearth furnace
KR101366574B1 (en) * 2012-07-23 2014-02-26 주식회사 포스코 Fuel for injecting a furnace and methof of injecting the same
CN102936526B (en) * 2012-10-23 2015-06-03 鞍钢股份有限公司 Blast furnace coal powder injection combustion adjuvant and application method thereof
CN108504414A (en) * 2018-05-28 2018-09-07 马鞍山钢铁股份有限公司 A kind of combustion adjuvant and application method and device improving blast furnace injection rate of pulverized coal combustion
CN110643760B (en) * 2019-09-30 2021-04-27 鞍钢股份有限公司 Ultrahigh Al2O3Blast furnace smelting method of furnace slag
CN110982578B (en) * 2019-11-22 2021-08-10 南京钢铁股份有限公司 Blast furnace blowing semi-coke additive and preparation and use method thereof

Also Published As

Publication number Publication date
CN112048349A (en) 2020-12-08

Similar Documents

Publication Publication Date Title
CN100465306C (en) Sintered ore capable of improving viscosity of blast furnace slag and process for preparing same
CN101476001B (en) Method for smelting medium titanium slag by blast furnace
CN102220440B (en) Vanadium-titanium magnetite blast furnace smelting method capable of improving vanadium yield
CN102127636B (en) Method for preparing low-SiO2 high-performance sinter ore
CN109652643B (en) High-quality sinter for COREX smelting reduction iron-making process and preparation method thereof
CN111910072A (en) Preparation and use methods of pre-reduced fluxed pellets with steel slag as partial raw material
CN102242251A (en) Alkaline V-Ti pellet and preparation method thereof
CN104342552B (en) A kind of composite adhesive for metallurgical briquetting and production method thereof
CN101649390A (en) Method for ultra-fine refined flour sintering for large-scale sintering machine
CN101613798B (en) Puddling additive and predation method thereof
CN102586589A (en) Method for applying Bayan Obo ore ultra-fine iron powder in sintering
CN109576488A (en) A method of sinter is produced using high proportion Bayan Obo iron ore concentrate
CN102417975A (en) Composite additive for preparing hematite concentrate pellet and application thereof
CN102409170A (en) High-mechanical strength carbon-containing pellets for blast furnace and production method for high-mechanical strength carbon-containing pellets
CN101289697B (en) Blast furnace ironmaking raw material and method for preparing same
CN112048349B (en) Blast furnace coal powder injection combustion improver and preparation and use methods thereof
CN103343219B (en) Method for producing sintered ore by using quick lime
CN105331808A (en) Method for iron ore powder agglomeration
CN110724774B (en) Method for smelting vanadium-titanium magnetite concentrate in blast furnace
KR101328256B1 (en) Method for manufacturing sintered ore
CN102230077A (en) Mixture for producing sintering ores
CN113943859A (en) Method for preparing sintered ore by utilizing high-density hematite powder
CN104263916A (en) Adhesive for pellet and preparation method of pellet
CN1676620A (en) Ore dressing process for reducing magnetic iron ore from hematite carbonaceous pelletizing
CN114480838A (en) Sintering method of prefabricated fluxed iron ore

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant