CN107236834A - A kind of method that steel cuttings enters blast furnace ironmaking - Google Patents
A kind of method that steel cuttings enters blast furnace ironmaking Download PDFInfo
- Publication number
- CN107236834A CN107236834A CN201710525601.8A CN201710525601A CN107236834A CN 107236834 A CN107236834 A CN 107236834A CN 201710525601 A CN201710525601 A CN 201710525601A CN 107236834 A CN107236834 A CN 107236834A
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- blast furnace
- steel cuttings
- steel
- conveyer belt
- furnace
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- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2200/00—Recycling of non-gaseous waste material
-
- 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
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a kind of method that steel cuttings enters blast furnace ironmaking, comprise the following steps：（1）Steel cuttings is cataclasm to length ＜ 50mm by cataclasm machine；（2）Steel cuttings conveyer belt is set up after the vibratory sieve of Research for Feeding Raw Materials System, before bucket elevator, iron ore or coke that the steel cuttings conveyed on the steel cuttings conveyer belt is conveyed with the Research for Feeding Raw Materials System is set to be mutually mixed in the conveyer belt or intermediate bunker after the vibratory sieve, before bucket elevator, enter furnace charge as blast furnace, enter blast furnace together in company with other furnace charges of blast furnace, become blast-melted.Because blast furnace has stronger reducing power, the average recovery rate of Fe elements of steel scrap bits brings up to the 98 ~ 99.5% of blast furnace ironmaking by the 84% of electrical arc furnace, simultaneously, the steel scrap bits of often increase by 10%, blast furnace iron coke per ton ratio or fuel ratio decline 20 ~ 35 kilograms, not only Fe recovery rate is significantly improved, and coke ratio or fuel ratio are substantially reduced.
Description
Technical field
The present invention relates to technical field of smelting, specifically related to steel cuttings is led directly as the reclaiming smelting technology of blast furnace burden
Domain, the method for blast furnace ironmaking is entered more particularly, to a kind of steel cuttings.
Background technology
Steel cuttings is generally used for electric-arc furnace steelmaking, to recycle, but so recovery has the shortcomings that it, and one is recovery utilization rate
It is low, general recovery rate 84% or so, in addition, producing, exhaust gas volumn is big, and energy consumption is big；Also useful intermediate frequency furnace etc. melts steel cuttings, but molten steel
Inspiratory capacity it is big, impurity content is big, cast steel billet out or to be made quality of materials unstable, often says into ground bar steel by people, right
The generation major safety risks of the industries such as building, with the production of country's cleaning ground bar steel, the utilization of steel scrap bits is intractable as one
Problem；Also useful steel cuttings is sintered into pellet also referred to as sintering deposit together with sintering feed ginseng, then enters back into blast furnace ironmaking,
Also part test has only been done, has not been widely used；Because steel cuttings is also easy to produce accumulation, formation adhesion, so steel cuttings is used directly to refining
Steel is also less, generally goes through and is pressed into bulk, just puts into converter, and directly using steel cuttings as blast furnace burden, it is even more unprecedented.
The content of the invention
In view of this, the purpose of the present invention is that there is provided the side that a kind of steel cuttings enters blast furnace ironmaking in view of the shortcomings of the prior art
Method, the recovery rate of metal Fe elements is high, and energy consumption bottom, cost is low, and the steel scrap bits of often increase by 10%, blast furnace iron coke per ton ratio or fuel
Than declining 20 ~ 35 kilograms, not only Fe recovery rate is significantly improved, moreover, coke ratio or fuel ratio are substantially reduced.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of method that steel cuttings enters blast furnace ironmaking, the method that steel cuttings enters blast furnace ironmaking comprises the following steps：
（1）Steel cuttings is cataclasm to length ＜ 50mm by cataclasm machine；
（2）Research for Feeding Raw Materials System is generally made up of three-level, including first-level transport chain, two-stage conveying chain and three-level carrier chain, described
First-level transport chain includes one-level iron ore belt conveyor and one-level coke belt conveyor and defeated positioned at one-level iron ore belt again
The vibratory sieve of machine tail end is sent, the two-stage conveying chain is the two-stage conveying below vibratory sieve and one-level coke belt conveyor
Belt, the three-level carrier chain is by the three-level hopper positioned at the two-stage conveying belt tail end（Or intermediate bunker）And be located at
Bucket elevator composition below three-level hopper, the bucket elevator connects the blast furnace charging aperture；Wherein iron ore is passed through
One-level iron ore belt conveyor enters vibratory sieve, then enters three-level hopper by two-stage conveying belt, is carried eventually through bucket type
The machine of liter feeding blast furnace, and coke it is different from iron ore when feed, coke is into two grades by one-level coke belt conveyor
Belt conveyor, subsequently into three-level hopper, blast furnace is sent into eventually through bucket elevator.
Steel cuttings conveyer belt is set up after the vibratory sieve of Research for Feeding Raw Materials System, before bucket elevator, makes the steel cuttings conveyer belt
The iron ore or coke that the steel cuttings of upper conveying is conveyed with the Research for Feeding Raw Materials System are after the vibratory sieve, before bucket elevator
Two-stage conveying belt or three-level hopper（Or intermediate bunker）Place is mutually mixed, as the furnace charge that enters of blast furnace, in company with blast furnace
Other furnace charges enter blast furnace together, become blast-melted.Steel scrap bits can both be mixed with coke, can also be mixed with iron ore, but
Preferably mixed with iron ore, because Coke density is smaller, be difficult have compaction to steel cuttings, and iron ore density is big, to steel cuttings
Compacting and peptizaiton it is larger, convey it is more convenient, meanwhile, steel cuttings is mixed with iron ore, also allow for amount of coke weigh and
Calculate.
Further, it is described enter blast furnace steel cuttings≤blast furnace iron ore total amount 30%.
Further, the steel cuttings conveyed on the steel cuttings conveyer belt sets electrical equipment to interlock with the Research for Feeding Raw Materials System
System.
Into the material of blast furnace, including three classes, the first kind is iron ore（The material of iron content）, it is lump ore or sinters iron ore, its
Middle lump ore is the iron content rich ore existed with block pattern, and Fe contents are in 55 ~ 60%, iron ore of the lumpiness between 20 ~ 45mm；The
Two classes are molten slag agent, also referred to as slag former, it is therefore an objective to by the impurity of the comparison indissoluble contained in iron ore, eutectic is become by slag former
Point material is separated with molten iron, and slag former main component is lime, is also the primary bond agent in pellet, and this kind of material is generally not
It is used alone；3rd class is the coke for heating and redox reaction in blast furnace.Generally sintering iron ore and lump ore shares one
Bar charging belt, and coke is with another belt.
The beneficial effects of the invention are as follows：
1st, the present invention discloses a kind of method that steel cuttings enters blast furnace ironmaking, after the vibratory sieve of Research for Feeding Raw Materials System, bucket elevator
Preceding erection steel cuttings conveyer belt, for conveying the iron ore that the steel cuttings conveyed on steel cuttings, steel cuttings conveyer belt is conveyed with Research for Feeding Raw Materials System
Or coke is mutually mixed in the two-stage conveying band or intermediate bunker after vibratory sieve, before bucket elevator, is used as blast furnace
Enter furnace charge, enter blast furnace together in company with other furnace charges of blast furnace, steel cuttings will not produce accumulation, is well mixed with material, it is whole defeated
Pass through Cheng Shunchang.Although steel cuttings is by cataclasm, with certain laxity, it is cataclasm after steel cuttings be packed together, still can shape
Into adhesion conglomeration, and if equably mixing, being checked if the adhesion clustering phenomena of steel cuttings with coke, sintering iron ore,
Especially mixed with sintering iron ore, because cemented iron mineral density is big, steel cuttings is easier with sintering iron ore, causes collection
The phenomenon of material is easy to be eliminated.
2nd, the steel cuttings and Research for Feeding Raw Materials System conveyed on steel cuttings conveyer belt sets electrical equipment interlock system, to control steel cuttings and thing
Material is while feeding, it can be ensured that steel cuttings is mixed evenly with material.
3rd, without worrying pollution problem of the greasy dirt to blase furnace cast iron, greasy dirt, which enters blast furnace, can be used as fuel；
4th, steel scrap bits or waste iron filing enter blast furnace, and recovery rate of iron is up to 98-99.5%, because steel scrap bits generally have part
Oxidation, in electric arc furnaces or other type of furnaces, already oxidised part is difficult to be reduced, and blast furnace can be accomplished to reduce iron oxide, institute
It is high with recovery rate of iron；The bits energy resource consumption of blast furnace steel scrap is lower than electric arc furnaces, and cost is low, and blast furnace often increases by 10% steel scrap bits,
The iron coke per ton ratio of blast furnace declines 20-35 kilograms.
Brief description of the drawings
Fig. 1 is the structural representation of Research for Feeding Raw Materials System.
Fig. 2 is the structural representation of embodiment one.
Fig. 3 is the structural representation of embodiment two and embodiment three.
In figure：1- blast furnaces, 2- one-level iron ore belt conveyors, 3- one-level coke belt conveyors, 4- vibratory sieves, 5-
Two-stage conveying belt, 6- three-level hoppers, 7- bucket elevators, 8- steel scraps bits conveyer belt.
Embodiment
The preferred embodiments of the present invention are described in detail below, it should be appreciated that effective embodiment is only for explanation sheet
Invention, the protection domain being not intended to be limiting of the invention.
Research for Feeding Raw Materials System is generally made up of three-level, as shown in figure 1, including first-level transport chain, two-stage conveying chain and three-level
Carrier chain, the first-level transport chain includes one-level iron ore belt conveyor 2 and one-level coke belt conveyor 3 and positioned at one again
The vibratory sieve 4 of the tail end of level iron ore belt conveyor 2, the two-stage conveying chain is to be located at vibratory sieve 4 and one-level coke Belt Conveying
The two-stage conveying belt 5 of the lower section of machine 3, the three-level carrier chain is by the three-level hopper 6 positioned at the tail end of two-stage conveying belt 5
（Or intermediate bunker）And the bucket elevator 7 positioned at the lower section of three-level hopper 6 is constituted, the bucket elevator 7 connects described
The charging aperture of blast furnace 1；Wherein iron ore enters vibratory sieve 4 through one-level iron ore belt conveyor 2, then passes through two-stage conveying belt
5 enter three-level hoppers 6, and blast furnace 1 is sent into eventually through bucket elevator 7, and coke it is different from iron ore when feed, coke is
Two-stage conveying belt is entered by one-level coke belt conveyor 3,5 subsequently into three-level hopper 6, eventually through bucket elevator
7 feeding blast furnaces 1.
Embodiment one
A kind of method that steel cuttings enters blast furnace ironmaking, comprises the following steps：
（1）Steel cuttings is cataclasm by cataclasm machine, cataclasm to length ＜ 50mm；
（2）As shown in Fig. 2 setting up steel cuttings conveyer belt 8 after the vibratory sieve 4 of Research for Feeding Raw Materials System, before bucket elevator 7, make institute
The iron ore of the steel cuttings and Research for Feeding Raw Materials System conveying conveyed on steel cuttings conveyer belt 8 is stated after the vibratory sieve 4, the bucket type
It is mutually mixed, as the furnace charge that enters of blast furnace, enters together in company with other furnace charges of blast furnace on two-stage conveying belt 5 before elevator 7
Enter blast furnace, oxidized reduction reaction or directly fusing become blast-melted.
It is described enter blast furnace steel cuttings account for into blast furnace iron ore total amount 30%, by taking 450m3 blast furnaces as an example, blast 245 ~
At 252KPa, 1220 ~ 1300Nm3/min of air quantity, 132 ~ 135KPa of top pressure, molten iron temperature >=1400 DEG C, Fe recovery rate is
99.5%, ton rail fuel drops to 456.53 kilograms by the consumption of ton rail fuel than declining 79.5 kilograms by 536.03 kilograms.
Embodiment two
A kind of method that steel cuttings enters blast furnace ironmaking, steel cuttings, which enters blast furnace ironmaking, following steps：
（1）Steel cuttings is cataclasm by cataclasm machine, cataclasm to length ＜ 40mm；
（2）As shown in figure 3, setting up steel cuttings conveyer belt 8 after the vibratory sieve 4 of Research for Feeding Raw Materials System, before bucket elevator 7, make institute
The iron ore of the steel cuttings and Research for Feeding Raw Materials System conveying conveyed on steel cuttings conveyer belt 8 is stated after the vibratory sieve 4, the bucket type
Three-level hopper 6 before elevator 7（Intermediate bunker）Inside it is mutually mixed, as the furnace charge that enters of blast furnace, in company with other furnace charges of blast furnace
Enter blast furnace together, oxidized reduction reaction or directly fusing become blast-melted.
It is described enter blast furnace steel cuttings account for into blast furnace iron ore total amount 20%, by taking 450m3 blast furnaces as an example, steel scrap bits enters blast furnace
Amount be the 20% of sintering deposit or lump ore total amount, in 245 ~ 252KPa of blast, 1220 ~ 1300Nm3/min of air quantity, top pressure 132 ~
At 135KPa, molten iron temperature >=1400 DEG C, Fe recovery rate is 99.2%, and ton rail fuel is disappeared than declining 59 kilograms by ton rail fuel
Consumption drops to 477.03 kilograms by 536.03 kilograms.
The steel cuttings conveyed on the steel cuttings conveyer belt sets electrical equipment interlock system with the Research for Feeding Raw Materials System, to control steel
Bits are with iron ore while feeding, is mutually mixed uniform.
Embodiment three
A kind of method that steel cuttings enters blast furnace ironmaking, steel cuttings, which enters blast furnace ironmaking, following steps：
（1）Steel cuttings is cataclasm by cataclasm machine, cataclasm to length ＜ 30mm；
（2）As shown in figure 3, setting up steel cuttings conveyer belt 8 after the vibratory sieve 4 of Research for Feeding Raw Materials System, before bucket elevator 3, make institute
The iron ore of the steel cuttings and Research for Feeding Raw Materials System conveying conveyed on steel cuttings conveyer belt 8 is stated after the vibratory sieve 4, the bucket type
Three-level hopper 6 before elevator 7（Intermediate bunker）Inside it is mutually mixed, as the furnace charge that enters of blast furnace, in company with other furnace charges of blast furnace
Enter blast furnace together, oxidized reduction reaction or directly fusing become blast-melted.
It is described enter blast furnace steel cuttings account for into blast furnace iron ore total amount 10%, by taking 450m3 blast furnaces as an example, steel scrap bits enters blast furnace
Amount be the 10% of sintering deposit or lump ore total amount, in 245 ~ 252KPa of blast, 1220 ~ 1300Nm3/min of air quantity, top pressure 132 ~
At 135KPa, molten iron temperature >=1400 DEG C, Fe recovery rate is 99.0%, and ton rail fuel is disappeared than declining 32 kilograms by ton rail fuel
Consumption drops to 504.03 kilograms by 536.03 kilograms.
The steel cuttings conveyed on the steel cuttings conveyer belt sets electrical equipment interlock system with the Research for Feeding Raw Materials System, it is,
The steel scrap bits conveyer belt 8 sets electrical equipment to interlock with one-level iron ore belt conveyor 2, starts shooting together, a start/stop machine is easy to steel scrap
The mixing of bits and iron ore, to control steel cuttings with material while feeding, is mutually mixed uniform.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (3)
1. a kind of method that steel cuttings enters blast furnace ironmaking, it is characterised in that：The method that steel cuttings enters blast furnace ironmaking comprises the following steps：
（1）Steel cuttings is cataclasm to length ＜ 50mm by cataclasm machine；
（2）Steel cuttings conveyer belt is set up after the vibratory sieve of Research for Feeding Raw Materials System, before bucket elevator, is made on the steel cuttings conveyer belt
The iron ore or coke that the steel cuttings of conveying is conveyed with the Research for Feeding Raw Materials System are after the vibratory sieve, before bucket elevator
It is mutually mixed in conveyer belt or intermediate bunker, as the furnace charge that enters of blast furnace, enters blast furnace together in company with other furnace charges of blast furnace, become
Into blast-melted.
2. the method that steel cuttings as claimed in claim 1 enters blast furnace ironmaking, it is characterised in that：It is described enter blast furnace steel cuttings≤blast furnace
Iron ore total amount 30%.
3. the method that steel cuttings as claimed in claim 1 enters blast furnace ironmaking, it is characterised in that：Conveyed on the steel cuttings conveyer belt
Steel cuttings sets electrical equipment interlock system with the Research for Feeding Raw Materials System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710525601.8A CN107236834A (en) | 2017-06-30 | 2017-06-30 | A kind of method that steel cuttings enters blast furnace ironmaking |
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| CN201710525601.8A CN107236834A (en) | 2017-06-30 | 2017-06-30 | A kind of method that steel cuttings enters blast furnace ironmaking |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265139A (en) * | 2018-01-25 | 2018-07-10 | 霍旭丰 | A kind of recycling of frivolous class steel scrap, reuse method |
| CN111471818A (en) * | 2020-03-17 | 2020-07-31 | 成渝钒钛科技有限公司 | Blast furnace production increasing technology for smelting vanadium titano-magnetite |
| CN111733305A (en) * | 2020-06-15 | 2020-10-02 | 武汉钢铁有限公司 | Blast furnace high zinc load smelting method |
| CN113061678A (en) * | 2021-03-05 | 2021-07-02 | 大冶特殊钢有限公司 | Blast furnace feeding system and method for adding slag steel into blast furnace |
| CN115612766A (en) * | 2022-10-24 | 2023-01-17 | 江苏沙钢集团有限公司 | Blast furnace smelting process capable of reducing energy consumption |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265139A (en) * | 2018-01-25 | 2018-07-10 | 霍旭丰 | A kind of recycling of frivolous class steel scrap, reuse method |
| CN111471818A (en) * | 2020-03-17 | 2020-07-31 | 成渝钒钛科技有限公司 | Blast furnace production increasing technology for smelting vanadium titano-magnetite |
| CN111733305A (en) * | 2020-06-15 | 2020-10-02 | 武汉钢铁有限公司 | Blast furnace high zinc load smelting method |
| CN111733305B (en) * | 2020-06-15 | 2022-03-15 | 武汉钢铁有限公司 | Blast furnace high zinc load smelting method |
| CN113061678A (en) * | 2021-03-05 | 2021-07-02 | 大冶特殊钢有限公司 | Blast furnace feeding system and method for adding slag steel into blast furnace |
| CN115612766A (en) * | 2022-10-24 | 2023-01-17 | 江苏沙钢集团有限公司 | Blast furnace smelting process capable of reducing energy consumption |
| CN115612766B (en) * | 2022-10-24 | 2024-04-02 | 江苏沙钢集团有限公司 | Blast furnace smelting process capable of reducing energy consumption |
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