CN106282451A - Reduce the method for the CO2 emission of blast furnace and relevant device - Google Patents
Reduce the method for the CO2 emission of blast furnace and relevant device Download PDFInfo
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- CN106282451A CN106282451A CN201610674500.2A CN201610674500A CN106282451A CN 106282451 A CN106282451 A CN 106282451A CN 201610674500 A CN201610674500 A CN 201610674500A CN 106282451 A CN106282451 A CN 106282451A
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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
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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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
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Abstract
The present invention relates to reduce the method for the CO2 emission of blast furnace and relevant device, wherein, reducing agent is loaded into furnace throat, and the auxiliary fuel of powdered form is injected into air port, and being characterized mainly in that of the method, the reducing agent being loaded into furnace throat includes Linesless charcoal.A preferred aspect according to the present invention, the specific consumption of the Linesless charcoal (15) being loaded into furnace throat is less than the 20% of the total amount of the reducing agent being loaded into furnace throat.By so carrying out, it is thus achieved that substantially reducing of CO2 emission, and reduce the relevant bigger recycling to Linesless charcoal to CO2 emission.
Description
The application is filing date JIUYUE in 2009 2 days, Application No. 200980161225.2, invention entitled " reduces height
The method of the CO2 emission of stove and relevant device " (PCT/FR2009/001052 enters State Period date 2012 3
Months 2 days) the divisional application of application.
Technical field
A kind of method that the present invention relates to CO2 emission reducing blast furnace.The invention still further relates to this side of a kind of enforcement
The device of method.
Background technology
Blast furnace is gas-liquid-solid convection type chemical reactor, and its main purpose is to produce the pig iron, and the pig iron is by reducing afterwards
Its carbon content and be converted into steel.
Blast furnace is generally supplied to solid material in the office, top of the blast furnace of the furnace throat of referred to as blast furnace, mainly agglomerate,
Pelletizing, iron ore and carbonaceous material, it is common that coke.The liquid being made up of the pig iron and slag is entered blast furnace by dispatch at siege
In lower part.
Iron-containing charge (agglomerate, pelletizing and iron ore) to the pig iron conversion traditionally by by reducing gas (its especially
It is to comprise CO, H2And N2) reducing iron oxides carries out, by carbonaceous material at its air port in the lower part being positioned at blast furnace
Burning formed, at the air port in the lower part being positioned at blast furnace inject be referred to as hot blast, temperature 1000 DEG C to 1300 DEG C it
Between preheated air.
This conversion process of iron-containing charge is carried out in two zoness of different of equipment, and the two region is by being referred to as
One zone line in thermmal storage district separates.Thermmal storage district is characterised by: with gas and solid actually be referred to as storage area
The termination of the heat exchange relevant for the fact that temperature is identical of temperature.This also causes in the chemical reaction between gas and solid
Stop, thus limit a chemistry storage area.
Two regions of the conversion carrying out iron-bearing materials are:
The lower part of-equipment, is referred to as smelting district, and this smelting district specifies the energy requirement of blast furnace and allows to implement ferrum oxidation
Thing conversion from wustite state to metallic iron.This smelting district also allows for carrying out material from final to the pig iron of the temperature of storage area
The heating of temperature and melted.
The upper part of-equipment, is referred to as area in preparation, and this area in preparation is used as calorific potential and the withdrawer of chemical potential of gas.Should
Area in preparation allows material temperature from ambient temperature to storage area, and iron oxides (bloodstone and the Magnet that will load
Ore deposit) revert to wustite state.
In order to improve production capacity and reduce cost, inject auxiliary fuel such as fine coal, fuel oil, natural gas or other
Fuel to air port, with hot blast rich in oxygen combine.
The gas reclaimed in the office, top of blast furnace is referred to as furnace top gas, mainly by CO, CO2、H2And N2Composition, it is each
It is about 22%, 22%, 3% and 53% from ratio.These gases generally use as fuel in the other parts of factory.Blast furnace
Therefore it is important CO2Produce.
But, from eighties of last century, CO in an atmosphere2Concentration significantly improve in face of, producing CO in a large number2Place,
The most especially at blast furnace, reduce CO2Discharge be critically important.
Say from this angle, in nearly 50 years, the consumption of reducing agent, and the consumption of the carbonaceous material mainly used
Amount halves, so that now, in the blast furnace of conventional configuration, carbon consumption has reached the most relevant to thermokinetics law
, with the lower limit the most relevant to the attribute of the carbonaceous material of the furnace throat being loaded into equipment and inherent character.
Summary of the invention
In this context, the present invention proposes a kind of method, and the method limits CO2 emission significantly, without right
Equipment carries out bigger amendment.
To this end, the method for the CO2 emission reducing blast furnace of the present invention is wherein, reducing agent is loaded into furnace throat, and
The auxiliary fuel of powdered form is injected into being characterized mainly in that of air port, and the reducing agent being loaded into furnace throat includes Linesless charcoal.
The method of the present invention can also include the following optional feature used either individually or in combination:
-be loaded into furnace throat Linesless charcoal specific consumption less than be loaded into furnace throat reducing agent total amount 20%.
-be loaded into furnace throat Linesless charcoal specific consumption less than be loaded into furnace throat reducing agent total amount 10%.
-the remaining part of reducing agent that is loaded into furnace throat is graphite.
-it is loaded into the shape of the Linesless charcoal of the furnace throat block diametrically more than 20 millimeters.
-the method includes a screening step, and this screening step is loaded into the Linesless charcoal block of furnace throat and divides with thin Linesless charcoal part
Open.
-thin Linesless charcoal part is injected into air port with powdered form, as to the correspondence being generally injected into air port with powdered form
Supplementing and/or replacement of the auxiliary fuel of quantity.
-auxiliary fuel or mineral coal, or Linesless charcoal.
The invention still further relates to a kind of device for implementing method defined hereinabove.Being characterized mainly in that of this device,
This device includes the loading part that Linesless charcoal is loaded into the furnace throat of blast furnace.
Assembly of the invention can also include the following optional feature used either individually or in combination:
-device includes a sieve, to separate being used for the Linesless charcoal block being loaded into furnace throat with thin Linesless charcoal part.
-device includes a grater, and in grater, thin Linesless charcoal part mixes with carbonaceous material, by thin Linesless charcoal part
The entirety formed with carbonaceous material is used for being injected into air port.
-corresponding carbonaceous material or mineral coal, or Linesless charcoal.
Accompanying drawing explanation
The explanation be given referring to the drawings by reading, is better understood with the present invention, in accompanying drawing:
-Fig. 1 is the schematic diagram of the assembly of the invention according to the first modification, wherein carrys out the thin Linesless charcoal part of self-sizing operation
The most no longer recycle, and
-Fig. 2 is the schematic diagram of the assembly of the invention according to the second modification, wherein carrys out the thin Linesless charcoal part of self-sizing operation
Recycle in the method.
Detailed description of the invention
Within the scope of the invention, the distinctive and main characteristic of these carbonaceous materials used as reducing agent is
Their gasification point or gasification start temperature.This relates to carbon that carbonaceous material the comprised gas with the shaft through blast furnace
CO2Start to react the temperature to provide carbon monoxide according to following chemical reaction:
C+CO2→2CO
This gasification point specifies the temperature of the storage area of blast furnace.In common blast furnace, this gasification starts temperature and is about 950
℃。
The method of the present invention is based on the fact that the temperature of storage area by reducing blast furnace, and the unit of reducing agent disappears
Consumption reduces, and the discharge of carbon dioxide also reduces.
Liquid metals coke consumption amount per ton, result, it is believed that the temperature for storage area reduces by 100 DEG C, is subtracted by applicant
It is about 20 kilograms less.
If being known by reducing the temperature of storage area with the activated charcoal commonly used coke of replacement, this is lived
Property coke need long-time and expensive preparation.Additionally, for the cognition of applicant, up to now, in the temperature reducing storage area
Degree and minimizing CO2Any contact it is not set up between discharge.
In this context, it has been found that add a small amount of Linesless charcoal being loaded into furnace throat, substitute the conventional of respective amount
Coke, it is allowed to the temperature of storage area is reduced and controls the gasification point to Linesless charcoal.
Linesless charcoal is of virtually the threshold of reaction, is about or less than 850 DEG C, therefore significantly less than generally being used at blast furnace
The threshold of reaction of smelter coke.
Additionally, Linesless charcoal is graphitic source, it is neutral in carbon dioxide produces, the most negative (negatif).No
Crossing, in the furnace charge of blast furnace, Linesless charcoal can be with substitute for coke, and CO2 emission is had an impact by coke, every kilogram of coke used
Discharge about 3 kilograms of CO2。
These effects combined (minimizing reducing the relevant coke quantity used to the temperature of storage area and graphite
(coke) is substituted by the carbon from Biomass (Linesless charcoal)) cause consumed coke to substantially reduce and therefore cause injection or load
The quantity of the graphite in blast furnace substantially reduces, and by follow-up effect, causes substantially reducing of CO2 emission.
With reference to Fig. 1, blast furnace 1 is supplied to coke, agglomerate, pelletizing and iron ore 2 by circuit 3 at furnace throat 4.The pig iron and
Slag 5 pass course 7 is in site 6 at siege and reclaims.Hot blast and additional oxygen 8 are inputted at air port 9 by circuit 10.Coal
And/or other assistant reducing agent inputs at air port 9 also by circuit 10.
Furnace top gas reclaims in the site 11 of the upper part of blast furnace 1.
According to the present invention, the Linesless charcoal 12 as received sieves process in 13 one, by sieving thin Linesless charcoal part 14 and charcoal lump
Separately, Linesless charcoal block is loaded into furnace throat 4 by a loading attachment 16 to body 15.The diameter of these Linesless charcoal blocks 15 is more than mesh (1a
Maille de coupure ducrible), i.e., at least 20 millimeters.
Linesless charcoal block 15 can or load with coke simultaneously, or load with iron ore simultaneously.
The Linesless charcoal quantity being loaded into furnace throat is the pig iron per ton 20 kilograms.
With reference to Fig. 2, Linesless charcoal block 15 is loaded into furnace throat 4 to be carried out under conditions of identical with reference to the condition described by Fig. 1.
According to this modification, the thin Linesless charcoal part 14 that the screening of the Linesless charcoal 12 freely received obtains in grater 18 with coal
17 mix and grind, to form the carbonaceous material 18a for being input to air port 9 by circuit 10a.This coal 17 can or ore deposit
Thing coal, or Linesless charcoal, as will in further detail below.It is injected into air port 9 by circuit 10a except schematically show
Coal, assistant reducing agent is also injected into air port.
The specific consumption of the carbonaceous material being injected into air port is the pig iron per ton 200 kilograms.This consumption includes from sieve
The thin Linesless charcoal part 14 of selection operation, it is assumed that screening efficiency is 50%, the estimation of this consumption is equal to the list of the Linesless charcoal being loaded into furnace throat
Position consumption, the pig iron the most per ton 20 kilograms.
As example, table I below illustrates the main operation characteristic of the blast furnace producing 6000 tons of pig iron every day, and works as basis
Second modification loads the Linesless charcoal block 15 of 20 kilograms to furnace throat and thin by produce when screening operation for motlten metal per ton
Linesless charcoal part 14 is injected into air port with the form of powdered charcoal, and the usual efflorescence injected on this blast furnace substituting equal number is auxiliary
During combustion-supporting material, the change of main operation characteristic.
The feature addressed in tablei is as follows:
-this blast furnace can reach under conditions of being considered maximum productivity, represents with ton day molten iron (t/j),
-it is blown into the flow of dry natural wind in air port, in the name of kilostere/hour (kNm under operating mode3/ h) represent,
-it is loaded into the specific consumption of coke of furnace throat, or product needed raw material quantity per ton, with the kg/ton pig iron
(kg/tf) represent,
-it is loaded into the specific consumption of Linesless charcoal of furnace throat, represent with the kg/ton pig iron (kg/tf),
-it is injected into the specific consumption of efflorescence mineral coal in air port, represent with the kg/ton pig iron (kg/tf),
-it is injected into the specific consumption of powdered charcoal in air port, represent with the kg/ton pig iron (kg/tf),
-it is injected into the specific consumption of efflorescence thin Linesless charcoal part in air port, represent with the kg/ton pig iron (kg/tf), this
Thin Linesless charcoal part 14 reclaims after screening Linesless charcoal 12 when producing the Linesless charcoal 15 being loaded into furnace throat,
-flame temperature, represents with degree Celsius (DEG C),
The temperature of-storage area, represents with degree Celsius (DEG C),
The temperature of-furnace top gas, represents with degree Celsius (DEG C), and
The flow of-furnace top gas, in the name of lower cube of m/h (Nm of operating mode3/ h) represent.
All blast furnaces have a given range of operation, and in this range of operation, the operation of blast furnace keeps optimum.In order to enter
Row mainly and reaches at the limit value of the calculating shown on Table I, predetermined operation, this limit value in some specific region of equipment
Temperature is relevant with the gas flow entering and/or passing blast furnace.These limit values are as follows:
The temperature of-furnace top gas is between 120 DEG C to 200 DEG C；
-flame temperature is between 2000 DEG C to 2200 DEG C；
The flow of-furnace top gas should be less than or equal to 400000Nm3/ h (restriction of technique)；
-it is dried the flow of natural wind less than or equal to 225kNm3/ h (restriction of technology)
The corresponding coke of benchmark 1 is loaded into furnace throat and efflorescence mineral coal is injected into air port.
The corresponding coke of benchmark 2 is loaded into furnace throat and powdered charcoal is injected into air port.Flame temperature is controlled in its maximum threshold
It is worth 2200 DEG C.
The Linesless charcoal block 15 that example 1 correspondence loads 20 kilograms for the pig iron per ton arrives furnace throat, is loaded into the carbonaceous material of furnace throat
Remaining part be made up of coke.Assuming that screening efficiency is 50%, self-sizing is come for motlten metal efflorescence per ton 20 kilograms
Thin Linesless charcoal part 14, to be injected into air port, substitute the mineral coal of the pig iron per ton 20 kilograms, be injected into the efflorescence carbon containing material in air port
The remaining part of material is mineral coals.In this example 1, suppose that the storage area temperature obtained due to the inherent character of Linesless charcoal is 850
℃。
Example 2 is same as Example 1, and the storage area temperature except being obtained due to the inherent character of Linesless charcoal is assumed to be equal to 750 DEG C.
The Linesless charcoal block 15 that example 3 correspondence loads 20 kilograms for the pig iron per ton arrives furnace throat, is loaded into the carbonaceous material of furnace throat
Remaining part be made up of coke.Assuming that screening efficiency is 50%, self-sizing is come for motlten metal efflorescence per ton 20 kilograms
Thin Linesless charcoal part 14, to be injected into air port, substitute injection Linesless charcoal that the pig iron per ton is obtained in a standalone fashion.It is injected into wind
The remaining part of the efflorescence carbonaceous material of mouth is made up of this Linesless charcoal obtained in a standalone fashion.Example 3 supposes due to Linesless charcoal
The temperature of storage area that obtains of inherent character be 850 DEG C.
Example 4 is same as Example 3, and the temperature of the storage area except obtaining due to the inherent character of Linesless charcoal is assumed to be equal to 750 DEG C.
If it is observed that keep the service condition of benchmark 1, in for the condition selected by this example 4, the operation of blast furnace is no longer
Possible.Only run more inefficient blast furnace can run under these conditions.Above-mentioned more inefficient operation can be passed through
Reduce more inefficient of material in the upper part of blast furnace or understood by the heat loss of higher equipment.At benchmark 3
In this later case, example 4 thus should compare with this benchmark 3 rather than compare with benchmark 1 and 2.In other words,
When the pig iron per ton being loaded to the Linesless charcoal block 15 of 20 kilograms to furnace throat with when corresponding thin Linesless charcoal part 14 is noted with powdered form
When entering the air port to blast furnace, in the amendment of operation of the result correspondence benchmark 3 that example 4 obtains.
For example 1 it is observed that followed in all operations condition defined above.Additionally, exist for blast furnace
Maximum possible production capacity under the conditions of these is noticeably greater than the rated output of this blast furnace.Blast furnace is it is thus possible to pass through for per ton
The pig iron load 20 kilograms Linesless charcoal block 15 to furnace throat and for the pig iron per ton by 20 kilograms of Linesless charcoals freely to be received 13
Screening operation thin Linesless charcoal part 14 be injected into air port and run.
For example 2, it is assumed that the temperature of storage area is 750 DEG C, no longer follows some reaction condition, is approximately less than especially
The flame temperature of 2000 DEG C.But, it is thus achieved that value seem sufficiently close together with this limit value, so that the operation of blast furnace is still possibility
's.Additionally, the maximum productivity allowed in these conditions is less than the rated output of equipment.But, for less production
The operation of ability, this kind of operation can be favourable, such as in the stage that metallurgy industry market are low.
But, it will be noticed that this result is relevant to the supposition relating to capacity of equipment.Especially, the ability being had is more than
The aerator of limited capability considered here allows the production capacity of blast furnace is maintained at its nominal 6000t/j.
For example 3, as example 1, all operations condition is followed.Therefore, when loading for motlten metal per ton
The Linesless charcoal block 15 of 20 kilograms to furnace throat, motlten metal per ton 20 kilograms is come self-sizing operation thin Linesless charcoal part 14 with
When powdered form is injected into air port, blast furnace, such that it is able to the temperature of the storage area of 850 DEG C is run, is injected into the remainder of the coal in air port
Part can be mineral coal, such as Linesless charcoal.
In example 4, if all operations condition is followed, as example 2, production capacity is less than 6000 ton day.Cause
This, the remaining part of the carbonaceous material no matter being injected into air port is mineral coal or Linesless charcoal, when the temperature of storage area is 750 DEG C,
Blast furnace runs the most in an optimal manner.But, for the operation of less production capacity, this operation can be favourable, example
Such as the stage low in metallurgy industry market.
As for example 2, this result is relevant to the supposition relating to capacity of equipment.
Table II also takes benchmark 1,2 and 3 and example 1 to 4, and illustrates according to this second modification, reduces with regard to coke consumption amount, two
Carbonoxide discharge reduces and to the recycling of Linesless charcoal for the advantage of the inventive method relevant with CO2 emission minimizing.
Its corresponding coke of benchmark 2 is injected into furnace throat and efflorescence thin Linesless charcoal part is injected into air port and benchmark 1 phase
Relatively it is shown.Benchmark 2 actually forms a kind of easy to implement for reducing CO2The solution of discharge.But, this
Solution has the disadvantages that the CO just exempted for every kilogram of Linesless charcoal used2For kilogram number, displaying all
Solution efficiency is minimum, as shown in whole results of this Table II.
Configuration for example 1, it is thus achieved that CO2 emission reduces 12%, for example 2, CO2 emission reduces 16%,
With for example 3 and example 4, CO2 emission reduces 46% and 48% respectively.
For example 1, coke consumption amount has reduced 13.5%, and for example 2, coke consumption amount has reduced 19.4%, for example 3
Coke consumption amount has reduced 11.4%, and has reduced 16.5% for example 4 coke consumption amount, and for benchmark 2 coke consumption amount
Higher than 2.7%.
Minimizing (representing with the kg/ton pig iron) and charcoal consumption amount (representing with identical unit) in CO2 emission
Between ratio exemplify the recycling to Linesless charcoal, be used for reducing CO2 emission.
It is loaded into furnace throat to furnace throat and air port it is observed that add a small amount of Linesless charcoal and is injected into the carbon containing in air port
The remaining part of material is that graphite allows the remaining part comparing the carbonaceous material being injected into air port when being Linesless charcoal to enter Linesless charcoal
The recycling that row is bigger.It practice, for example 1 and example 2, this ratio is respectively 4.65 and 6.00, and for example 3 and this ratio of example 4
Example is only 3.18 and 3.43, and is 2.83 for this ratio of benchmark 2.It practice, this means for identical available Linesless charcoal, example
1 or the configuration of example 2 allow for CO2That discharges totally reduces maximization.
According to the first modification, Table III illustrates the main operation characteristic of the blast furnace producing 6000 tons of pig iron every day, and when for
Motlten metal per ton loads the Linesless charcoal block 15 of 20 kilograms and is not injected into the thin Linesless charcoal part 14 that self-sizing operates to furnace throat and arrives
The change of main operation characteristic during air port.
The operation of the feature mentioned in table iii and regulation limit to and the relevant feature of table 1 and the operation of regulation
Limit identical.
Also illustrate that in table iii and the benchmark 1,2 and 3 explained is carried out for Table I and Table II.
The Linesless charcoal block 15 that example 5 correspondence loads 20 kilograms for the pig iron per ton arrives furnace throat, is loaded into the carbonaceous material of furnace throat
Remaining part be made up of coke.Mineral coal for the pig iron per ton 200 kilograms is injected into air port with powdered form.Carry out self-sizing
The thin Linesless charcoal part 14 of operation is not injected into air port.
Example 6 is same as Example 5, and the storage area temperature except being obtained due to the inherent character of Linesless charcoal is assumed to be equal to 750 DEG C.
Example 7 correspondence is loaded into furnace throat for the Linesless charcoal block 15 of the pig iron per ton 20 kilograms, is loaded into the carbonaceous material of furnace throat
Remaining part be made up of coke.The Linesless charcoal individually obtained for the pig iron per ton 200 kilograms is injected into air port with powdered form.
The thin Linesless charcoal part 14 carrying out self-sizing operation is not injected into air port.
Example 8 is same as Example 7, and the storage area temperature except being obtained due to the inherent character of Linesless charcoal is assumed to be equal to 750 DEG C.
If it is observed that keep the service condition of benchmark 1, in the condition selected by this example 8, the operation of blast furnace is no longer
Possible.The blast furnace only with relatively fallback can run under these conditions.Above-mentioned more inefficient operation is permissible
By the more inefficient of the material minimizing in the upper part of blast furnace or understood by the higher heat loss of device.Benchmark
3 are in later case, example 8 thus should compare with this benchmark 3 rather than compare with benchmark 1 and 2.In other words,
The result obtained in example 8 is corresponding: when the Linesless charcoal block 15 for the pig iron per ton 20 kilograms is loaded into the thin Linesless charcoal of furnace throat and correspondence
Amendment when part 14 is not injected into air port with powdered form, to the operation of benchmark 3.
For example 5 it is observed that followed in all operations condition defined above.Additionally, exist for blast furnace
Maximum possible production capacity in these conditions is noticeably greater than the rated output of this blast furnace.Blast furnace thus display be suitable to: by right
In motlten metal per ton load the Linesless charcoal block of 20 kilograms to furnace throat the thinnest Linesless charcoal part 14 of self-sizing be injected into wind
Mouthful and run.
For example 6, it is assumed that the temperature of storage area is 750 DEG C, and some reaction condition is no longer followed, and is slightly less than especially
The flame temperature of 2000 DEG C.But, it is thus achieved that value show sufficiently close together with this limit value, so that the operation of blast furnace is still possibility
's.Additionally, the maximum productivity allowed in these conditions is less than the rated output of equipment.But, for less production
The operation of ability, this kind of operation can be favourable, such as in the stage that metallurgy industry market are low.As for example 2 and example 4,
This result is relevant to the supposition relating to capacity of equipment.
For example 7, as example 5, all operations condition is followed.Therefore, when loading for motlten metal per ton
The Linesless charcoal block 15 of 20 kilograms carrys out the thin Linesless charcoal part 14 of self-sizing and does not mixes mutually with the powdered charcoal being usually injected into furnace throat
When injecting air port, blast furnace is such that it is able to the storage area temperature of 850 DEG C is run.
In example 8, if all operations condition is followed, as example 6, production capacity is less than 6000 ton day.Cause
This, the remaining part of the carbonaceous material no matter being injected into air port is mineral coal or Linesless charcoal, when the temperature of storage area is 750 DEG C,
Blast furnace runs the most in an optimal manner.But, for the operation of less production capacity, this kind of operation can be favourable, example
Such as the stage low in metallurgy industry market.
As for example 6, this result is relevant to the supposition relating to capacity of equipment.
Table IV also takes benchmark 1,2 and 3 and example 5 to 8, and illustrates according to the first modification with regard to the minimizing of coke consumption amount, dioxy
Change carbon emission to reduce and the advantage of the inventive method to the recycling of Linesless charcoal for relevant with CO2 emission minimizing.
Configuration for example 5, it is thus achieved that CO2 emission reduces 8%, and obtains CO2 emission minimizing for example 6
12%.
Configuration for example 7, it is thus achieved that CO2 emission reduces 46%, and obtains relative to benchmark 3 titanium dioxide for example 8
Carbon emission reduces 48%.
13.5% is reduced for example 5 coke consumption amount, and 19.1% is reduced for example 6 coke consumption amount.
10.9% is reduced for example 7 coke consumption amount, and relative to benchmark 3 coke consumption amount, 15.9% is reduced for example 8.
The ratio between (representing with kg/ton) and charcoal consumption (representing with identical unit) is reduced in CO2 emission
Exemplify the recycling to Linesless charcoal, be used for reducing CO2 emission.
The impact of the thin Linesless charcoal part of the screening of Linesless charcoal being not injected in the air port of blast furnace freely being received can be led to
Cross comparative example 1 and example 5, example 2 and example 6, example 3 and example 7 and example 4 and example 8 is estimated.Therefore it is observed that with as connect
The relevant recycling to Linesless charcoal of the total amount of the Linesless charcoal received (3.11) in example 5 significantly less than in example 1 (4.65), and exists equally
Significantly less than in example 2 (6.00) in example 6 (4.37).In comparative example 7 (2.87) and example 3 (3.18) and example 8 (3.09) and example 4
(3.43), time, also it is such less situation.
On the contrary, if it is considered that the Linesless charcoal used at blast furnace, i.e. can enter in addition in the thin Linesless charcoal part carrying out self-sizing
In the situation of row recycling, the recycling to Linesless charcoal relevant to the quantity of the Linesless charcoal actually entered in blast furnace is in example 5 (6.21)
In be noticeably greater than in example 1 (4.65), and same be noticeably greater than in example 2 (6.00) in example 6 (8.74).
But, in powdered charcoal is injected into the situation in air port, this is false, this be due in example 7 and example 8
The total amount of the Linesless charcoal that blast furnace reality is used is identical with the total amount of the Linesless charcoal used in example 3 and example 4 respectively.With in example 7
In (3.16) actually enter into the relevant recycling to Linesless charcoal of the quantity of the Linesless charcoal in blast furnace 7 thus with in example 3 (3.18)
The recycling to Linesless charcoal obtained is almost identical, similarly the recycling to Linesless charcoal of example 8 (3.41) and example 4 (3.43) to wood
The recycling of charcoal is the most close.Viewed difference with the Linesless charcoal 13 such as received and be typically injected into air port Linesless charcoal it
Between chemical composition difference be correlated with.
The all results shown above illustrate: load a small amount of Linesless charcoal to furnace throat, regardless of whether inject or be not injected into thin wood
Charcoal part is to air port, by means of the dual function of the temperature reduction of Linesless charcoal substitute for coke and storage area, it is allowed to significantly reduce
Coke consumption.Typically also, by the bigger recycling to Linesless charcoal, it is ore deposit at the carbonaceous material being injected into air port especially
In the situation of thing coal, CO2 emission significantly reduces.
Table I
Table II
Table III
Table IV
Herein below, corresponding to the original claims in parent application, is now incorporated to this as part of the specification
Place:
1. the method reducing the CO2 emission of blast furnace, wherein, reducing agent is loaded into furnace throat, and the auxiliary of powdered form
Fuel is injected into air port, it is characterised in that the reducing agent being loaded into furnace throat includes Linesless charcoal.
2.According to the method described in item 1, it is characterised in that be loaded into the specific consumption of Linesless charcoal (15) of furnace throat less than dress
Be downloaded to the reducing agent of furnace throat total amount 20%.
3. according to the method described in item 2, it is characterised in that be loaded into the specific consumption of Linesless charcoal (15) of furnace throat less than dress
Be downloaded to the reducing agent of furnace throat total amount 10%.
4. according to the method according to any one of item 1 to 3, it is characterised in that be loaded into the remaining portion of the reducing agent of furnace throat
Point it is the graphite of coke form.
5. according to the method according to any one of aforementioned item, it is characterised in that be loaded into the Linesless charcoal (15) of furnace throat (4) in directly
The footpath bulk shape more than 20 millimeters.
6., according to the method described in item 5, it is characterised in that the method includes a screening step, this screening step will load
Linesless charcoal (15) block to furnace throat (4) separates with thin Linesless charcoal part (14).
7. according to the method described in item 6, it is characterised in that described thin Linesless charcoal part (14) is injected into wind with powdered form
Mouthful, supplementing and/or substituting as the auxiliary fuel to the respective amount being generally injected into air port with powdered form.
8. according to the method described in item 7, it is characterised in that described auxiliary fuel or mineral coal, or Linesless charcoal.
9. implement the device according to the method according to any one of item 1 to 8, it is characterised in that this device includes Linesless charcoal
(15) loading part of the furnace throat (4) of blast furnace (1) it is loaded into.
10. according to the device described in item 9, it is characterised in that described device includes a sieve (13), will be used for being loaded into stove
Linesless charcoal (15) block of larynx (4) separates with thin Linesless charcoal part (14).
11. according to the device described in item 10, it is characterised in that device includes a grater (18), described in grater
Thin Linesless charcoal part (14) mixes with carbonaceous material (17), by described thin Linesless charcoal part (14) and described carbonaceous material (17) shape
The entirety become is used for being injected into air port (9).
12. according to the device described in item 11, it is characterised in that described carbonaceous material (17) or mineral coal, or
Linesless charcoal.
Claims (4)
1. the method reducing the CO2 emission of blast furnace, wherein, reducing agent is loaded into furnace throat, and the auxiliary fuel of powdered form
It is injected into air port, it is characterised in that the reducing agent being loaded into furnace throat includes Linesless charcoal；The unit of the Linesless charcoal (15) being loaded into furnace throat disappears
Consumption is less than the 10% of the total amount of the reducing agent being loaded into furnace throat, and the method includes screening step, and this screening step is loaded into
Linesless charcoal (15) block of furnace throat (4) separates with thin Linesless charcoal part (14), and described thin Linesless charcoal part (14) is noted with powdered form
Enter to air port, supplementing and/or substituting as the mineral coal to the respective amount being generally injected into air port with powdered form.
Method the most according to claim 1, it is characterised in that the remaining part of the reducing agent being loaded into furnace throat is coke shape
The graphite of formula.
Method the most according to claim 1 and 2, it is characterised in that the Linesless charcoal (15) being loaded into furnace throat (4) is diametrically more than
The bulk shape of 20 millimeters.
4. implement the device according to the method according to any one of Claim 1-3, it is characterised in that this device includes loading
Parts, Linesless charcoal (15) is loaded into the furnace throat (4) of blast furnace (1) by described loading part so that be loaded into the unit of the Linesless charcoal of furnace throat
Consumption is less than the 10% of the total amount of the reducing agent being loaded into furnace throat, and described device includes sieving (13), will be used for being loaded into stove
Linesless charcoal (15) block of larynx (4) separates with thin Linesless charcoal part (14), and described device includes grater (18), in grater
Described thin Linesless charcoal part (14) mixes with mineral coal (17), by described thin Linesless charcoal part (14) and described mineral coal (17) shape
The entirety become is used for being injected into air port (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674500.2A CN106282451A (en) | 2009-09-02 | 2009-09-02 | Reduce the method for the CO2 emission of blast furnace and relevant device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009801612252A CN102482723A (en) | 2009-09-02 | 2009-09-02 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
| PCT/FR2009/001052 WO2011027038A1 (en) | 2009-09-02 | 2009-09-02 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
| CN201610674500.2A CN106282451A (en) | 2009-09-02 | 2009-09-02 | Reduce the method for the CO2 emission of blast furnace and relevant device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801612252A Division CN102482723A (en) | 2009-09-02 | 2009-09-02 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106282451A true CN106282451A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610674500.2A Pending CN106282451A (en) | 2009-09-02 | 2009-09-02 | Reduce the method for the CO2 emission of blast furnace and relevant device |
| CN2009801612252A Pending CN102482723A (en) | 2009-09-02 | 2009-09-02 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801612252A Pending CN102482723A (en) | 2009-09-02 | 2009-09-02 | Method for reducing the carbon dioxide emissions of a blast furnace, and associated device |
Country Status (4)
| Country | Link |
|---|---|
| CN (2) | CN106282451A (en) |
| BR (1) | BR112012004763B1 (en) |
| CA (1) | CA2770947C (en) |
| WO (1) | WO2011027038A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9797023B2 (en) * | 2013-12-20 | 2017-10-24 | Grede Llc | Shaft furnace and method of operating same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133889A (en) * | 1994-12-06 | 1996-10-23 | 川崎制铁株式会社 | Method of blowing charcaol powder into blast furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB218647A (en) * | 1923-07-03 | 1925-09-25 | Commentry Fourchambault Et Dec | Process of treatment of ore in blast furnaces by the injection of powdered combustible concurrently with the use of a charge of coke |
| AT399724B (en) * | 1992-10-08 | 1995-07-25 | Voest Alpine Stahl | Process for producing pig iron making optimum use of the coal seam |
| JPH10306303A (en) * | 1997-04-30 | 1998-11-17 | Kawasaki Steel Corp | Operation of vertical type melting furnace |
| JP4383075B2 (en) * | 2003-03-28 | 2009-12-16 | 新日本製鐵株式会社 | Method for producing highly reactive molded coke for blast furnace |
| AU2005265480B2 (en) * | 2004-07-30 | 2008-06-12 | Posco | Apparatus for manufacturing molten irons by injecting fine coals into a melter-gasifier and the method using the same |
-
2009
- 2009-09-02 CA CA2770947A patent/CA2770947C/en active Active
- 2009-09-02 WO PCT/FR2009/001052 patent/WO2011027038A1/en active Application Filing
- 2009-09-02 BR BR112012004763-9A patent/BR112012004763B1/en active IP Right Grant
- 2009-09-02 CN CN201610674500.2A patent/CN106282451A/en active Pending
- 2009-09-02 CN CN2009801612252A patent/CN102482723A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133889A (en) * | 1994-12-06 | 1996-10-23 | 川崎制铁株式会社 | Method of blowing charcaol powder into blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| F. G. EMMERICH ETC.: "Reduction of emissions from blast furnaces by using blends of coke and babassu charcoal", 《FUEL》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011027038A1 (en) | 2011-03-10 |
| BR112012004763A2 (en) | 2020-12-08 |
| CA2770947C (en) | 2015-06-16 |
| BR112012004763B1 (en) | 2022-08-16 |
| CN102482723A (en) | 2012-05-30 |
| CA2770947A1 (en) | 2011-03-10 |
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