CN87106397A - Distributing process of high mixture ratio pellet for bell type-blast furnace - Google Patents
Distributing process of high mixture ratio pellet for bell type-blast furnace Download PDFInfo
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- CN87106397A CN87106397A CN87106397.2A CN87106397A CN87106397A CN 87106397 A CN87106397 A CN 87106397A CN 87106397 A CN87106397 A CN 87106397A CN 87106397 A CN87106397 A CN 87106397A
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- blast furnace
- ore
- ore deposit
- coke ratio
- lower bell
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Abstract
The invention belongs to the blast furnace smelting process method.
The invention discloses ore deposit/coke ratio that a kind of ore deposit/coke ratio that can make the edge district of blast furnace is higher than the central section, and the highest distributing process of ore deposit/coke ratio of intermediate zone.The mixing loading sequence that main points of the present invention are to take dark stockline height, enlarge lower bell diameter and ore batch weight and adopt just same dress and half upside-down mounting simultaneously.Thereby, reduced the fuel ratio 3-5% of blast furnace effectively; Improved iron quality; Prolong the shaft life-span 50%; The cost of the pig iron reduces by 3-5%; Improve the throughput of blast furnace significantly.
Description
The invention belongs to the blast furnace smelting governance processing method.
At present, domestic and international blast-furnace smelting because the pellet angle of rest (repose) is less than the coke angle of rest (repose), thus every pellet ratio greater than 60% blast furnace, the ore deposit/coke ratio in its edge district is well below the ore deposit/coke ratio of central section, the burden distribution of formation center accumulation type.Therefore cause blast furnace fuel than high, power consumption is big; Slag desulfurization capacity weakens and causes sulphur content rising in the pig iron, has influenced the quality of the pig iron widely; Simultaneously, because the edge air-flow of blast furnace excessively develops, shortened the shaft life-span of blast furnace.The company of Nippon Steel of Japan, company of Kobe Steel also have to the pellet ratio limit is controlled at respectively below 30% and 50% based on helpless.Thereby in blast-furnace smelting, every pellet ratio is greater than 60% blast furnace, and its burden distribution but is that the problem of formation center accumulation type has come not solve for a long time.
The objective of the invention is: in order to overcome the shortcoming of prior art, eliminate the aggrade disadvantage of type of burden distribution formation center.And then to prolong the shaft life-span; Improve iron quality; Cut down the consumption of energy; Improve the throughput of blast furnace.
Solution of the present invention is: specialized designs is a kind of can to make the ore deposit/coke ratio along furnace throat radial direction edge district of blast furnace be higher than the ore deposit/coke ratio of central section, and the highest distributing process of ore deposit/coke ratio of intermediate zone.Main points of the present invention are: pellet ratio greater than 60% bell type-blast furnace on (uneasy furnace throat fender plate) adopt dark stockline height, enlarge the lower bell diameter, enlarge ore batch weight and mix loading sequence.The said dark stockline height of the present invention promptly is lower than the stockline of furnace charge and the following certain altitude of furnace throat impact point.Its stockline degree of depth is 1.10 times～1.50 times of impact point height, and optimum value is 1.20～1.40 times.After having only the blast-furnace line height to be lower than furnace charge and the following certain depth of furnace throat impact point, the pellet angle of rest (repose) could be consistent with the coke angle, and then could eliminate pellet center stack long-standing abuse disease effectively.
In order to make full use of the useful volume of blast furnace, improve the height of dark stockline, the present invention takes to enlarge the lower bell diameter, improve the furnace charge impact point, the additional lower bell that one (fixing with screw) is installed at the bell type-blast furnace lower edge encloses the edge, and additional lower bell encloses the diameter on edge and should be 1.10～1.20 times of former lower bell diameter.
For the effect that utilizes ore that the impact energy of charge level is directly proportional with its ore batch weight and the stockline degree of depth, the coke layer that promotes the edge district moves to intermediate zone and central section, promotes more pellet to be distributed in the edge district to improve the ore deposit/coke ratio value in edge district.The present invention has taked the expansion ore batch weight, makes ore layer cover whole furnace throat cross section, and ore batch weight must surpass critical ore batch weight, reaches the level that edge district ore layer thickness approaches central section ore layer thickness simultaneously.Take to enlarge ore batch weight, the not only evenly distribution of pellet/coke ratio on the furnace throat cross section, and can make the edge district can pile up ore deposit/coke ratio that ore deposit/coke ratio that more pellets impel the edge district is higher than the central section extraly.
In order to improve the ore deposit/coke ratio in blast furnace edge district, reduce the ore deposit/coke ratio of central section, the present invention takes just to mix loading sequence with dress (OOCC ↓) and half upside-down mounting (COOC ↓) simultaneously.Be the ore deposit/coke ratio that improves the edge district just wherein, and half upside-down mounting is the ore deposit/coke ratio that reduces the central section, so just must take mixing loading sequence simultaneously with dress and half upside-down mounting with dress.Both ratios are by furnace throat radial direction Co
2% is higher than central point Co
2% or edge point temperature are lower than the central point temperature.
The present invention has adopted in the affiliated technical field those of ordinary skill processing method of true routine in fact.Therefore for the expert of this subject, they can enclose the edge to the stockline degree of depth of blast furnace material distribution method, additional lower bell, the ore deposit is criticized size and loading sequence etc. and carried out various changes, but final total the spirit and scope of the invention that be unable to do without.
The present invention is bright by the industrial implementation illustration: effectively utilize coal gas energy, chemical energy in the blast-furnace smelting.Reduced the fuel ratio 3-5% of blast furnace; The sulphur content of the pig iron reduces greatly simultaneously, has improved the quality of the pig iron; Prolong the shaft life-span 50%; Therefore the cost of the pig iron reduces 3-5%; Improved the throughput of blast furnace significantly.
Claims (5)
1, a kind of high mixture ratio pellet bell type-blast furnace distributing process of 60%～100% that is used for, particularly a kind of ore deposit/coke ratio along furnace throat radial direction edge district that can make blast furnace is higher than the ore deposit/coke ratio of central section, and the highest distributing process of ore deposit/coke ratio of intermediate zone, feature of the present invention is: adopt dark stockline height, enlarge the lower bell diameter, enlarge ore batch weight and mix loading sequence.
2, dark stockline height according to claim 1 is characterized in that: the stockline degree of depth and impact point height 1.10～1.50 times, optimum value is 1.20～1.40 times.
3, expansion lower bell diameter according to claim 1 is characterized in that: at aniseed clock-type blast furnace lower edge additional lower bell is installed and is enclosed the edge, improve the furnace charge impact point, the diameter that additional lower bell encloses the edge should be 1.10～1.20 times of former lower bell diameter.
4, expansion ore batch weight according to claim 1 is characterized in that: ore batch weight must surpass critical ore batch weight, makes ore layer cover whole furnace throat cross section.
5, mixing loading sequence according to claim 1 is characterized in that: just adopt simultaneously to be mixed into the luggage material with dress (OOCC ↓) and half upside-down mounting (COOC ↓).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106397.2A CN1005272B (en) | 1987-09-22 | 1987-09-22 | Distributing process of high mixture ratio pellet for bell type-blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106397.2A CN1005272B (en) | 1987-09-22 | 1987-09-22 | Distributing process of high mixture ratio pellet for bell type-blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87106397A true CN87106397A (en) | 1988-04-27 |
| CN1005272B CN1005272B (en) | 1989-09-27 |
Family
ID=4815687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87106397.2A Expired CN1005272B (en) | 1987-09-22 | 1987-09-22 | Distributing process of high mixture ratio pellet for bell type-blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005272B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021255A (en) * | 2009-12-31 | 2011-04-20 | 宝钢集团新疆八一钢铁有限公司 | Distribution method of bell-free blast furnace with high proportion pellet ore burden structure |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN109554511A (en) * | 2019-01-17 | 2019-04-02 | 经文波 | Bell-less blast furnace increases the novel loading method of thickness of feed layer of the same race |
-
1987
- 1987-09-22 CN CN87106397.2A patent/CN1005272B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021255A (en) * | 2009-12-31 | 2011-04-20 | 宝钢集团新疆八一钢铁有限公司 | Distribution method of bell-free blast furnace with high proportion pellet ore burden structure |
| CN107782760A (en) * | 2017-10-20 | 2018-03-09 | 武汉钢铁有限公司 | The method of testing of high furnace charge melting Performance Match degree |
| CN107782760B (en) * | 2017-10-20 | 2019-09-24 | 武汉钢铁有限公司 | The test method of high furnace charge melting Performance Match degree |
| CN109554511A (en) * | 2019-01-17 | 2019-04-02 | 经文波 | Bell-less blast furnace increases the novel loading method of thickness of feed layer of the same race |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1005272B (en) | 1989-09-27 |
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