CN107119156A - A kind of method for improving blast furnace top gas temperature - Google Patents
A kind of method for improving blast furnace top gas temperature Download PDFInfo
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- CN107119156A CN107119156A CN201710267836.1A CN201710267836A CN107119156A CN 107119156 A CN107119156 A CN 107119156A CN 201710267836 A CN201710267836 A CN 201710267836A CN 107119156 A CN107119156 A CN 107119156A
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- temperature
- blast furnace
- furnace top
- control
- sintering deposit
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- 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
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of method for improving blast furnace top gas temperature, (1) improves sintering deposit material temperature；(2) blast furnace operating institution adjustment, is specifically included：First, Rich Oxygen Amount is controlled；2nd, coal is than control；3rd, blast is controlled；4th, furnace top pressure and pressure difference control；5th, Control for Kiln Temperature；6th, top burden distribution system adjustment direction；7th, by upper shaft cooling wall cooling water inflow reduction by 20% 30%.The method of the raising blast furnace top gas temperature is reasonable in design, by improving 3# blast furnace top gas temperatures, it can ensure the gas temperature into casing between 80 260 DEG C, then occurring water recovery phenomenon when avoiding gas temperature less than 80 DEG C causes the dust-removal cloth-bag in casing to be scrapped, the service life of reduction dust-removal cloth-bag or cloth bag burnt in a short time when it also avoid gas temperature higher than 260 DEG C, so as to ensure that dry dust pelletizing system being capable of normal work.
Description
Technical field
The present invention relates to blast-furnace technique field, specifically a kind of method for improving blast furnace top gas temperature.
Background technology
Blast furnace dry method dust is a kind of advanced technologies of current blast furnace gas purification.Dry-method bag-type dust collecting is to blast furnace coal temperature
Degree has certain requirement, and the raw gas temperature into casing must be between 80-260 DEG C.Such as gas temperature is less than 80 DEG C, then occurs
Water recovery phenomenon, moist coal gas can make bag-type dust make moist by bag-type dust, and dry blast furnace ash runs into humidity
Cloth bag the stasis of blood can accumulate in large quantities and then paste the passage of dust-removal cloth-bag, reduce the dust collection capacity of bag-type dust, ultimately result in casing
Interior dust-removal cloth-bag is scrapped.If gas temperature is higher than 260 DEG C, the service life or in a short time of dust-removal cloth-bag can be reduced
Cloth bag is burnt.Under normal circumstances, the temperature of blast furnace gas dust removing effects between 120-220 DEG C are best.At present, 3# blast furnaces
(460m3) because furnace top gas temperature it is relatively low, cause 3# blast furnace dries dust pelletizing system abnormal.Therefore, the present invention provides a kind of raising 3#
The method of blast furnace top gas temperature, it is ensured that dry dust pelletizing system being capable of normal work.
The content of the invention
It is an object of the invention to provide a kind of method for improving blast furnace top gas temperature, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical scheme：
A kind of method for improving blast furnace top gas temperature, including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=65 DEG C of blast furnace feeding sintering deposit, single measurement data are not less than 45 DEG C, and temperature measuring point is in 3#
On the charging belt of blast furnace, during measurement sintering deposit temperature, it is desirable to temperature-measuring gun apart from sintering deposit measurement point distance for 955 ±
50mm-1055 ± 50mm, measurement frequency is to be measured 1 time per 1.5-2.5 hours, and the mean temperature that the sintering deposit of stove is entered in blast furnace is
The average value of the temperature data repeatedly measured, the temperature data record that temperature-measuring gun is measured is preserved in form, and in time；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 3500m3Within/h, wanted if top temperature is still not reaching to
Ask, continue to reduce Rich Oxygen Amount, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, coal is than control in 150-160kg/t；
3rd, blast is controlled：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast improve to
230-260kpa；
4th, furnace top pressure and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 120-140kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is in 0.48 ± 0.050%-0.53 ± 0.050%；
6th, top burden distribution system adjustment direction：Air quantity averagely reaches 1500-1800m3During/min, using compacting edge coal
The burden distribution system of gas；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%.
It is used as further scheme of the invention：Mean temperature >=70 DEG C of step (1) the blast furnace feeding sintering deposit, single
Measurement data is not less than 50 DEG C, and temperature measuring point is on the charging belt of 3# blast furnaces, during measurement sintering deposit temperature, it is desirable to thermometric
Rifle is 1000 ± 50mm apart from the distance of sintering deposit measurement point, and measurement frequency is to measure 1 time for every 2 hours, and the burning of stove is entered in blast furnace
The mean temperature of knot ore deposit is the average value of the temperature data repeatedly measured, and the temperature data that temperature-measuring gun is measured is recorded in form
It is interior, and preserve in time.
It is used as further scheme of the invention：The Rich Oxygen Amount upper limit control is in 3000m3Within/h.
It is used as further scheme of the invention：The coal is than control in 155kg/t.
It is used as further scheme of the invention：The Control for Kiln Temperature is 0.5 ± 0.050%.
It is used as further scheme of the invention：It is described Step 6: air quantity averagely reaches 1650m3During/min, using compacting side
The burden distribution system of edge coal gas.
It is used as further scheme of the invention：It is described Step 3: blast control：Coal gas total amount is improved by increasing air quantity,
Air quantity is improved to 1680m3/ min, blast is improved to 255kpa.
It is used as further scheme of the invention：It is described Step 4: furnace top pressure and pressure difference control：Reduce furnace top pressure, stove
Pressure on top surface is reduced to 133kpa.
Compared with prior art, the beneficial effects of the invention are as follows：
The method of the raising blast furnace top gas temperature is reasonable in design, by improving 3# blast furnace top gas temperatures, can protect
Card enters the gas temperature of casing between 80-260 DEG C, it is to avoid gas temperature then occurs water recovery and showed when being less than 80 DEG C
As causing the dust-removal cloth-bag in casing to be scrapped, the service life of dust-removal cloth-bag is reduced when it also avoid gas temperature higher than 260 DEG C
Or in a short time burn cloth bag, so as to ensure that dry dust pelletizing system being capable of normal work.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Embodiment 1
A kind of method for improving blast furnace top gas temperature, including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=65 DEG C of blast furnace feeding sintering deposit, single measurement data are not less than 45 DEG C, and temperature measuring point is in 3#
On the charging belt of blast furnace, during measurement sintering deposit temperature, it is desirable to temperature-measuring gun apart from sintering deposit measurement point distance for 955 ±
50mm, blast furnace workshop section wants specification section chief's measuring method, it is ensured that measurement accuracy, and measurement frequency is to measure 1 time for every 1.5 hours, high
The mean temperature for entering the sintering deposit of stove in stove is the average value of the temperature data repeatedly measured, the temperature data that temperature-measuring gun is measured
Record is preserved in form, and in time, is consulted in order to sinter workshop section；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 3500m3Within/h, wanted if top temperature is still not reaching to
Ask, continue to reduce Rich Oxygen Amount, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, increases ton iron coal gas amount by carrying high-coal ratio, coal is than control in 150kg/t；
3rd, blast is controlled：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast improve to
230kpa；
4th, furnace top pressure and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 120kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is 0.48 ± 0.050%；
6th, top burden distribution system adjustment direction：The measure of development edge coal gas should not be taken, in order to avoid cause gas utilization rate
Reduction, fuel ratio is significantly raised, possessed in condition, i.e., air quantity averagely reaches 1500m3Using compacting edge coal gas during/min
Burden distribution system, further centre of development Gas Flow reaches the measure for improving top temperature with this；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%, reduces thermal loss, improve gas temperature.
Embodiment 2
A kind of method for improving blast furnace top gas temperature, including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=65 DEG C of blast furnace feeding sintering deposit, single measurement data are not less than 45 DEG C, and temperature measuring point is in 3#
On the charging belt of blast furnace, during measurement sintering deposit temperature, it is desirable to temperature-measuring gun apart from sintering deposit measurement point distance for 1055 ±
50mm, blast furnace workshop section wants specification section chief's measuring method, it is ensured that measurement accuracy, and measurement frequency is to measure 1 time for every 2.5 hours, high
The mean temperature for entering the sintering deposit of stove in stove is the average value of the temperature data repeatedly measured, the temperature data that temperature-measuring gun is measured
Record is preserved in form, and in time, is consulted in order to sinter workshop section；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 3500m3Within/h, wanted if top temperature is still not reaching to
Ask, continue to reduce Rich Oxygen Amount, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, increases ton iron coal gas amount by carrying high-coal ratio, coal is than control in 160kg/t；
3rd, blast is controlled：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast improve to
260kpa；
4th, furnace top pressure and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 140kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is 0.53 ± 0.050%；
6th, top burden distribution system adjustment direction：The measure of development edge coal gas should not be taken, in order to avoid cause gas utilization rate
Reduction, fuel ratio is significantly raised, possessed in condition, i.e., air quantity averagely reaches 1800m3Using compacting edge coal gas during/min
Burden distribution system, further centre of development Gas Flow reaches the measure for improving top temperature with this；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%, reduces thermal loss, improve gas temperature.
Embodiment 3
A kind of method for improving blast furnace top gas temperature, including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=70 DEG C of step (1) the blast furnace feeding sintering deposit, single measurement data are not less than 50 DEG C, temperature
Measurement point on the charging belt of 3# blast furnaces, measurement sintering deposit temperature when, it is desirable to temperature-measuring gun apart from sintering deposit measurement point away from
From for 1000 ± 50mm, blast furnace workshop section wants specification section chief's measuring method, it is ensured that measurement accuracy, and measurement frequency is to survey for every 2 hours
Amount 1 time, the mean temperature that the sintering deposit of stove is entered in blast furnace is the average value of the temperature data repeatedly measured, and temperature-measuring gun is measured
Temperature data record is preserved in form, and in time, is consulted in order to sinter workshop section；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 3000m3Within/h, wanted if top temperature is still not reaching to
Ask, continue to reduce Rich Oxygen Amount, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, increases ton iron coal gas amount by carrying high-coal ratio, coal is than control in 155kg/t；
3rd, blast is controlled：By improving coal gas total amount by increasing air quantity, calorific value of gas is improved, air quantity is by original
1550m3/ min is improved to 1680m3/ min, blast is improved to 255kpa by original 245kpa；
4th, furnace top pressure and pressure difference control：By reducing furnace top pressure, improve into stove air quantity, increase coal gas amount, furnace roof pressure
Power is reduced to 133kpa by original 140kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is 0.50 ± 0.050%；
6th, top burden distribution system adjustment direction：The measure of development edge coal gas should not be taken, in order to avoid cause gas utilization rate
Reduction, fuel ratio is significantly raised, possessed in condition, i.e., air quantity averagely reaches 1650m3Using compacting edge coal gas during/min
Burden distribution system, further centre of development Gas Flow reaches the measure for improving top temperature with this；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%, reduces thermal loss, improve gas temperature.
Embodiment 4
A kind of method for improving blast furnace top gas temperature, including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=75 DEG C of step (1) the blast furnace feeding sintering deposit, single measurement data are not less than 60 DEG C, temperature
Measurement point on the charging belt of 3# blast furnaces, measurement sintering deposit temperature when, it is desirable to temperature-measuring gun apart from sintering deposit measurement point away from
From for 1025 ± 50mm, blast furnace workshop section wants specification section chief's measuring method, it is ensured that measurement accuracy, and measurement frequency is every 1.8 hours
Measurement 1 time, the mean temperature that the sintering deposit of stove is entered in blast furnace is the average value of the temperature data repeatedly measured, and temperature-measuring gun is measured
Temperature data record preserved in form, and in time, in order to sinter workshop section consult；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 2500m3Within/h, wanted if top temperature is still not reaching to
Ask, continue to reduce Rich Oxygen Amount, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, increases ton iron coal gas amount by carrying high-coal ratio, coal is than control in 152kg/t；
3rd, blast is controlled：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast improve to
240kpa；
4th, furnace top pressure and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 130kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is 0.51 ± 0.050%；
6th, top burden distribution system adjustment direction：The measure of development edge coal gas should not be taken, in order to avoid cause gas utilization rate
Reduction, fuel ratio is significantly raised, possessed in condition, i.e., air quantity averagely reaches 1610m3Using compacting edge coal gas during/min
Burden distribution system, further centre of development Gas Flow reaches the measure for improving top temperature with this；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%, reduces thermal loss, improve gas temperature.
The method of the raising blast furnace top gas temperature is reasonable in design, by improving 3# blast furnace top gas temperatures, can protect
Card enters the gas temperature of casing between 80-260 DEG C, it is to avoid gas temperature then occurs water recovery and showed when being less than 80 DEG C
As causing the dust-removal cloth-bag in casing to be scrapped, the service life of dust-removal cloth-bag is reduced when it also avoid gas temperature higher than 260 DEG C
Or in a short time burn cloth bag, so as to ensure that dry dust pelletizing system being capable of normal work.
The better embodiment to this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
, can also be on the premise of this patent objective not be departed from formula, the knowledge that one skilled in the relevant art possesses
Make a variety of changes.
Claims (8)
1. a kind of method for improving blast furnace top gas temperature, it is characterised in that including：
(1) improve sintering deposit material temperature, concretely comprise the following steps：
Mean temperature >=65 DEG C of blast furnace feeding sintering deposit, single measurement data are not less than 45 DEG C, and temperature measuring point is in 3# blast furnaces
On the charging belt of groove, during measurement sintering deposit temperature, it is desirable to which temperature-measuring gun is 955 ± 50mm- apart from the distance of sintering deposit measurement point
1055 ± 50mm, measurement frequency is to be measured 1 time per 1.5-2.5 hours, and the mean temperature that the sintering deposit of stove is entered in blast furnace is multiple
The average value of the temperature data of measurement, the temperature data record that temperature-measuring gun is measured is preserved in form, and in time；
(2) blast furnace operating institution adjustment, is specifically included：
First, Rich Oxygen Amount is controlled：The Rich Oxygen Amount upper limit is controlled in 3500m3Within/h, if top temperature is still not reaching to requirement, continue
Rich Oxygen Amount is reduced, Rich Oxygen Amount lower limit is controlled in 2800m3/ more than h；
2nd, coal is than control：High-coal ratio is carried, coal is than control in 150-160kg/t；
3rd, blast is controlled：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast is improved to 230-
260kpa；
4th, furnace top pressure and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 120-140kpa；
5th, Control for Kiln Temperature：Control for Kiln Temperature level is improved, Control for Kiln Temperature is in 0.48 ± 0.050%-0.53 ± 0.050%；
6th, top burden distribution system adjustment direction：Air quantity averagely reaches 1500-1800m3During/min, using the cloth of compacting edge coal gas
Material system；
7th, upper shaft cooling wall cooling water inflow is reduced into 20%-30%.
2. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that the step (1) is high
Stove enters mean temperature >=70 DEG C of stove sintering deposit, and single measurement data are not less than 50 DEG C, and temperature measuring point is upper 3# blast furnaces
Expect on belt, during measurement sintering deposit temperature, it is desirable to which temperature-measuring gun is 1000 ± 50mm, measurement frequency apart from the distance of sintering deposit measurement point
Rate is to measure 1 time for every 2 hours, and the mean temperature that the sintering deposit of stove is entered in blast furnace is the average value of the temperature data repeatedly measured,
The temperature data record that temperature-measuring gun is measured is preserved in form, and in time.
3. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that the Rich Oxygen Amount upper limit
Control is in 3000m3Within/h.
4. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that the coal exists than control
155kg/t。
5. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that the Control for Kiln Temperature exists
0.5 ± 0.050%.
6. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that described Step 6: wind
Amount averagely reaches 1650m3During/min, using the burden distribution system of compacting edge coal gas.
7. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that described Step 3: wind
Voltage-controlled system：Coal gas total amount is improved by increasing air quantity, air quantity is improved to 1680m3/ min, blast is improved to 255kpa.
8. the method according to claim 1 for improving blast furnace top gas temperature, it is characterised in that described Step 4: stove
Pressure on top surface and pressure difference control：Furnace top pressure is reduced, furnace top pressure is reduced to 133kpa.
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Cited By (3)
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| CN108060281A (en) * | 2017-12-04 | 2018-05-22 | 山西太钢不锈钢股份有限公司 | A kind of method of blast furnace drop furnace temperature |
| CN108642219A (en) * | 2018-04-24 | 2018-10-12 | 武汉钢铁有限公司 | A method of improving blast furnace top gas temperature |
| CN114807471A (en) * | 2022-05-07 | 2022-07-29 | 中冶赛迪工程技术股份有限公司 | Furnace top gas temperature regulating and controlling process and system |
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| CN108642219A (en) * | 2018-04-24 | 2018-10-12 | 武汉钢铁有限公司 | A method of improving blast furnace top gas temperature |
| CN114807471A (en) * | 2022-05-07 | 2022-07-29 | 中冶赛迪工程技术股份有限公司 | Furnace top gas temperature regulating and controlling process and system |
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| Publication number | Publication date |
|---|---|
| CN107119156B (en) | 2021-05-04 |
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