CN107586901B - One kind preventing the raised control method of blast furnace cupola well side wall temperatures - Google Patents
One kind preventing the raised control method of blast furnace cupola well side wall temperatures Download PDFInfo
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- CN107586901B CN107586901B CN201710873429.5A CN201710873429A CN107586901B CN 107586901 B CN107586901 B CN 107586901B CN 201710873429 A CN201710873429 A CN 201710873429A CN 107586901 B CN107586901 B CN 107586901B
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Abstract
The invention discloses one kind to prevent the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it is completed by following steps: the inflow temperature control of cupola well cooling wall exists: 28 DEG C -33 DEG C；The water-in and water-out temperature difference≤0.25 DEG C of cupola well cooling wall；The proportion for adjusting feed stock for blast furnace, makes in clinker: CaO/SiO2Control is between 1.22-1.27, sulfur content of hot metal≤0.020%, MgO/Al2O3Control the range 0.6-0.65；The load for adjusting feeding density charcoal, makes the silicon content in molten iron be maintained at 0.45%-0.55%, the physical temperature of molten iron is at 1500-1520 DEG C；Control 1.0-1.6 times that tapping molten iron flow velocity is molten iron formation speed；Iron mouth depth is 0.26-0.36 times of cupola well diameter.The present invention makes blast furnace crucibe that certain thickness molten iron be kept to coagulate iron layer, it is therefore prevented that bosh gas index temperature increases, and has ensured production safety.
Description
Technical field
The present invention relates to a kind of improvement of ironmaking production method, specifically one kind prevents blast furnace cupola well side wall temperature
Raised control method is spent, makes blast furnace cupola well that certain thickness molten iron be kept to coagulate iron layer, to keep bosh gas index temperature steady
It is scheduled on operation in comparatively safe controlled range, prevents blast furnace crucibe side wall temperatures from increasing, ensures production safety, is extended high
Furnace li`.
Background technique
The production of blast furnace ironmaking is usually used the fuel in table 1 in iron-smelting raw material and table 2 and is carried out by certain proportion
, blast furnace used, the bosh gas index bricking of especially large and medium-sized blast furnace, in the environment of high temperature, by State of Blast Furnace
Anticyclonic extruding and liquid molten iron, clinker, which constantly flow, in material gravity and furnace washes away easily brittle, formation bricking erosion, thick
Degree is thinned, and causes bosh gas index temperature to increase, injures safety, influence the service life of generation blast furnace.
There are many raised control measures of blast furnace cupola well side wall temperatures: cupola well grouting, increase molten iron in titanium content,
Reduce rate of driving, improve silicon content in pig iron, adjustment blowing system, increase intensity of cooling etc., these ways and means, although right
Administering the raising of bosh gas index temperature has certain effect, but larger to production capacity and cost impact, and administers and be not thorough, again and again.
Summary of the invention
The purpose of the present invention is to provide one kind without being transformed to blast furnace, not checking, do not control oxygen, titaniferous be not added
Expect furnace retaining, operating procedure is simple, and the thickness of iron layer is coagulated by On-line Control, prevents brick lining from corroding, achieves effective control furnace
Cylinder side wall temperatures prevent the raised control method of blast furnace cupola well side wall temperatures.
In order to reach the goals above, the technical scheme adopted by the invention is that: the one kind preventing blast furnace cupola well side wall
The raised control method of temperature, it is characterised in that: it is completed by following steps: (1), blast furnace cupola well cooling wall is controlled
Water-in and water-out temperature: the inflow temperature control of cupola well cooling wall exists: 28 DEG C -33 DEG C；The water-in and water-out temperature difference of cupola well cooling wall≤
0.25℃；(2), optimize slagging regime and thermal system: according to the type of iron-smelting raw material, adjusting the proportion of feed stock for blast furnace, make clinker
In: CaO/SiO2Control is between 1.22-1.27, MgO/Al2O3Range of the control 0.6-0.65, sulfur content of hot metal≤
0.020%；The load for adjusting feeding density charcoal, makes the silicon content in molten iron be maintained at 0.45% -0.55%, the physical temperature of molten iron exists
1500—1520℃；(3), control tapping molten iron flow velocity is 1.0-1.6 times of molten iron formation speed；Iron mouth depth is that cupola well is straight
0.26-0.36 times of diameter；Adhere to the stable molten iron of a layer thickness in blast furnace hearth wall and coagulate iron layer, to prevent furnace
Cylinder side wall temperatures increase.
The beneficial effects of the present invention are: without being transformed to blast furnace, operating procedure is simple, passes through On-line Control
Molten iron coagulates the thickness of iron layer, makes blast furnace cupola well that certain thickness molten iron be kept to coagulate iron layer, and brick lining is prevented to corrode, thus
Run bosh gas index temperature stabilization in comparatively safe controlled range, it is therefore prevented that blast furnace crucibe side wall temperatures increase,
It has ensured production safety, has extended the life of the blast furnace.
Specific embodiment
The one kind preventing the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it passes through following step
Rapid to complete: (1), the water-in and water-out temperature of control blast furnace cupola well cooling wall: the inflow temperature control of cupola well cooling wall exists: 28
℃—33℃；The water-in and water-out temperature difference≤0.25 DEG C of cupola well cooling wall；(2), optimize slagging regime and thermal system: former according to ironmaking
The type of material adjusts the proportion of feed stock for blast furnace, makes in clinker: CaO/SiO2Control is between 1.22-1.27, MgO/Al2O3
Control the range 0.6-0.65, sulfur content of hot metal≤0.020%；The load for adjusting feeding density charcoal, makes the silicon content in molten iron
It is maintained at 0.45%-0.55%, the physical temperature of molten iron is at 1500-1520 DEG C；(3), control tapping molten iron flow velocity is raw for molten iron
At 1.0-1.6 times of speed；Iron mouth depth is 0.26-0.36 times of cupola well diameter；Adhere in blast furnace hearth wall
The stable molten iron of a layer thickness coagulates iron layer, to prevent bosh gas index temperature from increasing.
Ironmaking production is carried out below according to the iron-smelting fuel in the iron-smelting raw material and table 2 in table 1, and illustrates the one kind
Prevent the raised control method of blast furnace cupola well side wall temperatures.
Table 1: blast furnace ironmaking is with material composition table (mineral aggregate):
Table 2: blast furnace ironmaking is with propellant composition table (fuel):
| Project | Qkcal | C consolidates % | H2O% | Ash% | Vm% | S% | - 200 mesh % | CSR% | CRI% |
| Coke | 29500 | 87 | 0.5 | 11.0 | 1.0 | 0.75 | 70 | 23 | |
| Coal dust | 30000 | 73 | 1.5 | 11.5 | 16.0 | 0.55 | 70 |
Embodiment 1: with 3200m3Blast furnace for.
Using traditional production technology, this 3200m3Each test point temperature on the bosh gas index of blast furnace are as follows: two layers
West side test point is 420 DEG C, and two layers of east side test point are 400 DEG C, and two layers of north side test point are 415 DEG C；Three layers of west side test point
It is 443 DEG C, three layers of east side test point are 450 DEG C, and two layers of north side test point are 440 DEG C；Four layers of west side test point are 428 DEG C, four
Layer east side test point is 446 DEG C, and four layers of north side test point are 435 DEG C.
One kind of the present invention prevents the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it
It is completed by following steps:
(1), 3200m is controlled3The inflow temperature of blast furnace crucibe cooling wall: 28 DEG C, the water-in and water-out temperature difference of cupola well cooling wall:
0.20℃；(2), using the iron-smelting raw material in table 1, the proportion of feed stock for blast furnace is adjusted, makes the CaO/SiO in clinker2Control exists:
1.27, sulfur content of hot metal: 0.016%, MgO/Al2O3Control exists: 0.6；Using the iron-smelting fuel in table 2, feeding density charcoal is adjusted
Load is maintained at the silicon content in molten iron: 0.45%, the physical temperature of molten iron: 1520 DEG C；(3), molten iron formation speed is controlled:
5.69t/min, tapping molten iron flow velocity 5.69t/min；Cupola well diameter 13300mm, iron mouth depth 3500mm；It can make blast furnace
Hearth wall adheres to the molten iron that a layer thickness is 100mm and coagulates iron layer, to prevent bosh gas index temperature from increasing.Through detecting: this
3200m3Each test point temperature on the bosh gas index of blast furnace are as follows: two layers of west side test point are 383 DEG C, two layers of east side detection
Point is 385 DEG C, and two layers of north side test point are 393 DEG C；Three layers of west side test point are 423 DEG C, and three layers of east side test point are 430 DEG C,
Two layers of north side test point are 415 DEG C；Four layers of west side test point are 412 DEG C, and four layers of east side test point are 428 DEG C, four layers of north side inspection
Measuring point is 398 DEG C.
Embodiment 2: with 1780m3For blast furnace.
Using traditional production technology, this 1780m3Each test point temperature on the bosh gas index of blast furnace are as follows: two layers
Northeast measuring point is 423 DEG C, and two layers of northwest measuring point are 415 DEG C, and two layers of southeast measuring point are 403 DEG C；Three layers of northeast measuring point are 442 DEG C,
Three layers of northwest measuring point are 542 DEG C, and three layers of southeast measuring point are 496 DEG C；Four layers of northeast measuring point are 383 DEG C, and four layers of northwest measuring point are 533
DEG C, four layers of southeast measuring point are 490 DEG C.
One kind of the present invention prevents the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it
It is completed by following steps:
(1), 1780m is controlled3The inflow temperature of blast furnace crucibe cooling wall: 30 DEG C；The water-in and water-out temperature difference of cupola well cooling wall:
0.24℃；(2), using the iron-smelting raw material in table 1, the proportion of feed stock for blast furnace is adjusted, makes CaO/SiO in clinker2Control exists:
1.25 MgO/Al2O3Control exists: 0.63, sulfur content of hot metal: 0.018%；Using the iron-smelting fuel in table 2, feeding density charcoal is adjusted
Load is maintained at the silicon content in molten iron: 0.55%, the physical temperature of molten iron exists: 1500 DEG C；(3), control molten iron generates speed
Degree: 3.02t/min, tapping molten iron flow velocity 3.3t/min；Cupola well diameter 9750mm, iron mouth depth 3200mm；Ironmaking can be made high
Furnace hearth wall adheres to the molten iron that a layer thickness is 100mm and coagulates iron layer, to prevent bosh gas index temperature from increasing.Through detecting: this
1780m3Each test point temperature on the bosh gas index of blast furnace are as follows: two layers of northeast measuring point are 405 DEG C, and two layers of northwest measuring point are
373 DEG C, two layers of southeast measuring point are 373 DEG C；Three layers of northeast measuring point are 380 DEG C, and three layers of northwest measuring point are 450 DEG C, and three layers of southeast are surveyed
Point is 435 DEG C；Four layers of northeast measuring point are 322 DEG C, and four layers of northwest measuring point are 414 DEG C, and four layers of southeast measuring point are 403 DEG C.
Embodiment 3: with 450m3Blast furnace for.
Using traditional production technology, this 450m3Test point temperature on the bosh gas index of blast furnace are as follows: 508 DEG C.
One kind of the present invention prevents the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it
It is completed by following steps: (1), controlling 450m3Blast furnace crucibe cooling wall inflow temperature: 32 DEG C；The water-in and water-out of cupola well cooling wall
0.25 DEG C of the temperature difference；(2), using the iron-smelting raw material in table 1, the proportion of feed stock for blast furnace is adjusted, makes the CaO/SiO in clinker2Control
1.23, MgO/Al2O3Control is 0.65, sulfur content of hot metal: 0.019%；Using the iron-smelting fuel in table 2, feeding density charcoal is adjusted
Load, be maintained at the silicon content in molten iron: 0.50%, the physical temperature of molten iron exists: 1500 DEG C；(3), control molten iron generates
Speed: 1.39t/min, tapping molten iron flow velocity: 2.22t/min；Cupola well diameter 5600mm, iron mouth depth 1800mm；It can make to refine
Iron blast furnace hearth wall adheres to the molten iron that a layer thickness is 100mm and coagulates iron layer, to prevent bosh gas index temperature from increasing.Through examining
It surveys: this 450m3Test point temperature on the bosh gas index of blast furnace are as follows: 433 DEG C.
Embodiment 4: with 180m3Blast furnace for.
Using traditional production technology, this 180m3Test point temperature on the bosh gas index of blast furnace are as follows: 475 DEG C.
One kind of the present invention prevents the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it
It is completed by following steps: (1), controlling 180m3Blast furnace crucibe cooling wall inflow temperature: 33 DEG C；The water-in and water-out of cupola well cooling wall
0.25 DEG C of the temperature difference；(2), using the iron-smelting raw material in table 1, the proportion of feed stock for blast furnace is adjusted, makes the CaO/SiO in clinker2Control
1.22, MgO/Al2O3Control is 0.65, sulfur content of hot metal: 0.020%；Using the iron-smelting fuel in table 2, feeding density charcoal is adjusted
Load, be maintained at the silicon content in molten iron: 0.50%, the physical temperature of molten iron: 1500 DEG C；(3), control molten iron generates speed
Degree: 0.69t/min, tapping molten iron flow velocity: 1.1t/min；Cupola well diameter 4500mm, iron mouth depth 1600mm；Ironmaking can be made high
Furnace hearth wall adheres to the molten iron that a layer thickness is 100mm and coagulates iron layer, to prevent bosh gas index temperature from increasing.Through detecting: this
180m3Test point temperature on the bosh gas index of blast furnace are as follows: 430 DEG C.
Claims (1)
1. one kind prevents the raised control method of blast furnace cupola well side wall temperatures, it is characterised in that: it is complete by following steps
At:
(1), 1780m is controlled3The inflow temperature of blast furnace crucibe cooling wall: 30 DEG C；The water-in and water-out temperature difference of cupola well cooling wall: 0.24
℃；(2), the proportion for adjusting feed stock for blast furnace, makes CaO/SiO in clinker2Control exists: 1.25, MgO/Al2O3Control exists: 0.63, iron
Water sulfur content: 0.018%；The load for adjusting feeding density charcoal, is maintained at the silicon content in molten iron: 0.55%, the physics temperature of molten iron
Degree exists: 1500 DEG C；(3), molten iron formation speed: 3.02t/min, tapping molten iron flow velocity 3.3t/min is controlled；Cupola well diameter
9750mm, iron mouth depth 3200mm；The molten iron that blast furnace hearth wall can be made to adhere to a layer thickness 100mm coagulates iron layer,
To prevent bosh gas index temperature from increasing.
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Citations (3)
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|---|---|---|---|---|
| CN1120072A (en) * | 1994-11-24 | 1996-04-10 | 重庆钢铁(集团)公司 | Smelting method of blast furnace low-titanium slag |
| CN104388612A (en) * | 2014-10-23 | 2015-03-04 | 大冶特殊钢股份有限公司 | Furnace protecting method for blast furnace with low-cost titanium ore |
| CN106048112A (en) * | 2016-07-11 | 2016-10-26 | 山西太钢不锈钢股份有限公司 | Method of regular furnace protection using schreyerite |
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2017
- 2017-09-25 CN CN201710873429.5A patent/CN107586901B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120072A (en) * | 1994-11-24 | 1996-04-10 | 重庆钢铁(集团)公司 | Smelting method of blast furnace low-titanium slag |
| CN104388612A (en) * | 2014-10-23 | 2015-03-04 | 大冶特殊钢股份有限公司 | Furnace protecting method for blast furnace with low-cost titanium ore |
| CN106048112A (en) * | 2016-07-11 | 2016-10-26 | 山西太钢不锈钢股份有限公司 | Method of regular furnace protection using schreyerite |
Non-Patent Citations (2)
| Title |
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| 《太钢5号高炉在低冶炼强度条件下操作制度的探索与优化》;刘文文;《山西冶金》;20151231(第158期);69-71页 |
| 《邯宝1号3200m_3高炉炉缸侧壁温度升高的治理》;夏万顺 等;《2016年第四届炼铁对标、节能降本及相关技术研讨论文集》;20161231;453-460页 |
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