CN107119157B - The method for determining mine batch and furnace top pressure according to blast-furnace bosh coal gas volume index - Google Patents
The method for determining mine batch and furnace top pressure according to blast-furnace bosh coal gas volume index Download PDFInfo
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- CN107119157B CN107119157B CN201710288503.7A CN201710288503A CN107119157B CN 107119157 B CN107119157 B CN 107119157B CN 201710288503 A CN201710288503 A CN 201710288503A CN 107119157 B CN107119157 B CN 107119157B
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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
- C21B5/006—Automatically controlling the process
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Abstract
According to the method that blast-furnace bosh coal gas volume index determines mine batch and furnace top pressure, belong to blast furnace ironmaking safe operation field, it is characterized in that: the mine batch=- 46.71+2.65* furnace top underlining+5~15, unit is t；The furnace top pressure=12.73+3.69* furnace top underlining+15~30, unit are KPa；3500~5000m3The big blast furnace capping value of grade, 1500~3500m3Grade small furnace removes limit value.The present invention realizes the accurate positioning of mine batch and furnace top pressure under different furnace top underlinings in blast furnace normal productive process；By improving mine batch and furnace top pressure, fuel ratio is reduced, is to realize that the main way of high utilization factor production is levied in a certain range by furnace top underlining control.
Description
Technical field
The invention belongs to blast furnace ironmaking, blast-furnace bosh gas volume index technique fields.
Background technique
With the development of China's steel industry, economic benefit brought by large blast furnace and strong competitiveness are increasingly prominent
Out, carrying out basic research to the production operation of large blast furnace is just particularly important, reasonable furnace top underlining control
One of as.The definition of furnace top underlining is the gas flowrate in bosh passed through on unit hearth area, from aerodynamic force
It learns in angle, is an important parameter for measuring intensification of smelting process in BF degree.
Blast-furnace bosh coal gas volume index is analyzed by the 52m of low level3/(min.m2) it is stepped up high-order 67m3/
(min.m2), how different working of a furnace features when production are inquired by the Proper Match of operations system and operating concept
Change, to realize reasonable furnace top underlining control, to be blast furnace in high-coal ratio, high utilization factor production, is formed
Realize that low-fuel ratio production provides guidance under higher furnace top underlining.
Blast furnace process production has the characteristics that black box, although being mounted with largely to detect galvanic couple and furnace on furnace body
Body pressure tap, but all fail directly to reflect the smelting process in blast furnace.
Blast furnace during normal production, in order to realize certain yield, coal than horizontal, it is thus necessary to determine that certain air supply parameter, such as
Air quantity, Rich Oxygen Amount, blast humidity and injecting coal quantity etc., coal dust and coke will burn in blast furnace tuyere area, with the oxygen in air blast
Various physics, chemical reaction occur with the wet part of air blast, to be formed by CO, N2And H2The gas flowrate in bosh that gas is combined into.Blast furnace exists
Different yield, the coal gas flowrate in bosh more different than will form under index.Gas flowrate in bosh just obtains bosh divided by hearth area
Coal gas volume index is a parameter for characterizing blast furnace process reinforcing degree.The difference of its furnace top underlining characterizes one
Thus the difference of blast furnace process state causes its required mine batch and furnace top pressure also will be different.
Summary of the invention
The method that the present invention determines mine batch and furnace top pressure according to blast-furnace bosh coal gas volume index, in order to Neng Gouzhun
It really points out blast furnace during normal production, the mine batch size in blast furnace ironmaking process is determined under different furnace top underlinings
And furnace top pressure promotes the direct motion steady in a long-term of blast furnace and the improvement of technical-economic index with the operation of this Instructing manufacture.
Technical solution of the present invention:
According to the method that blast-furnace bosh coal gas volume index determines mine batch and furnace top pressure, it is characterized in that the gas flowrate in bosh
Bosh.G=(H in Bosh.G2CO in)+(Bosh.G)+(N in Bosh.G2)；Unit is m3/min；
According to actual instrument position and detection means, compared with core formula are as follows:
In formula: BV represents cold flow, and unit is Nm3/min；
BH represents humidification humidity, and unit is g/m3；
O2Representing oxygen-enriched flux unit is Nm3/h；
The unit of coal dust air supply is Nm3/min；
The unit of coal powder blowing amount is kg/h；
The coal dust unit of amount containing H is %；
Oxygen concentration is 99.6%；
The unit of atmospheric moisture part is g/m2；
The mine batch=- 46.71+2.65* furnace top underlining+5~15, unit is t；
The furnace top pressure=12.73+3.69* furnace top underlining+15~30, unit are kPa；
3500~5000m3The big blast furnace capping value of grade, 1500~3500m3Grade small furnace removes limit value.
The present invention realizes in blast furnace normal productive process mine batch and furnace top pressure under different furnace top underlinings
Accurate positionin.To change in traditional sense the unilateral cognition in blast furnace production process to mine batch and furnace top pressure, accordingly
Operation of blast furnace production is instructed, the improvement of the production direct motion and technical-economic index of large blast furnace is promoted.
On blast furnace operating, by improving mine batch and furnace top pressure, fuel ratio is reduced, furnace top underlining control is existed
It is the main way sign for realizing high utilization factor production in a certain range.
Specific embodiment
It is counted through production practice data, certain blast furnace is in 8300~10500m3Under/min gas flowrate in bosh, different mine batch and
Furnace top pressure see the table below.
Certain blast-furnace bosh coal gas volume index by 52m3/(min.m2) constantly arrive 67m3/(min.m2), mine batch and furnace roof
Pressure and furnace top underlining are in positive correlativity.According to the difference of furnace top underlining, mine batch is also gradually by 120t
It is gradually increased to 136t, furnace top pressure is also stepped up 260KPa by 220Kpa.And it returns and obtains following 2 formula:
Mine batch=- 46.71+2.65* furnace top underlining+5~15, unit is t；
Furnace top pressure=12.73+3.69* furnace top underlining+15~30, unit are KPa；
3500~5000m3The big blast furnace capping value of grade, 1500~3500m3Grade small furnace removes limit value.
Claims (1)
1. according to the method that blast-furnace bosh coal gas volume index determines mine batch and furnace top pressure, it is characterized in that the gas flowrate in bosh
Bosh.G=(H in Bosh.G2CO in)+(Bosh.G)+(N in Bosh.G2)；Unit is m3/min；
In Bosh.G
In Bosh.G
In Bosh.G
According to actual instrument position and detection means, compared with core formula are as follows:
In Bosh.G
In Bosh.G In Bosh.G
In formula: BV represents cold flow, and unit is Nm3/min；
BH represents humidification humidity, and unit is g/m3；
O2Representing oxygen-enriched flux unit is Nm3/h；
The unit of coal dust air supply is Nm3/min；
The unit of coal powder blowing amount is kg/h；
The coal dust unit of amount containing H is %；
Oxygen concentration is 99.6%；
The unit of atmospheric moisture part is g/m2。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710288503.7A CN107119157B (en) | 2017-04-27 | 2017-04-27 | The method for determining mine batch and furnace top pressure according to blast-furnace bosh coal gas volume index |
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| CN201710288503.7A CN107119157B (en) | 2017-04-27 | 2017-04-27 | The method for determining mine batch and furnace top pressure according to blast-furnace bosh coal gas volume index |
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| CN107119157A CN107119157A (en) | 2017-09-01 |
| CN107119157B true CN107119157B (en) | 2019-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112176135B (en) * | 2020-09-15 | 2022-07-05 | 万洲电气股份有限公司 | Energy-saving optimization method and system based on blast furnace energy efficiency analysis |
| CN114277205A (en) * | 2021-11-19 | 2022-04-05 | 中冶赛迪工程技术股份有限公司 | Method for determining optimal injection amount of blast furnace injection medium |
| CN114139799A (en) * | 2021-11-30 | 2022-03-04 | 武汉钢铁有限公司 | Method for determining air inlet area of blast furnace tuyere |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596306A (en) * | 1982-06-30 | 1984-01-13 | Nippon Steel Corp | Blast furnace operation in iron and steel making process |
| CN1594601A (en) * | 2004-06-17 | 2005-03-16 | 上海交通大学 | Method for stabilizing blast furnace operation based on equilibrium point |
| CN104404182A (en) * | 2014-11-13 | 2015-03-11 | 北京首钢股份有限公司 | Quantitative blast furnace throat gas distribution method |
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2017
- 2017-04-27 CN CN201710288503.7A patent/CN107119157B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596306A (en) * | 1982-06-30 | 1984-01-13 | Nippon Steel Corp | Blast furnace operation in iron and steel making process |
| CN1594601A (en) * | 2004-06-17 | 2005-03-16 | 上海交通大学 | Method for stabilizing blast furnace operation based on equilibrium point |
| CN104404182A (en) * | 2014-11-13 | 2015-03-11 | 北京首钢股份有限公司 | Quantitative blast furnace throat gas distribution method |
Non-Patent Citations (3)
| Title |
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| 再谈高炉"炉腹煤气量指数"问题;那树人;《内蒙古科技大学学报》;20131231;第32卷(第4期);第321-324页 |
| 太钢5号高炉合理煤气流的控制;唐顺兵 等;《四川冶金》;20150228;第37卷(第1期);第12-16页 |
| 用炉腹煤气量指数诺模化来指导高炉操作;项钟庸;《钢铁》;20110531;第46卷(第5期);第7-10页 |
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