CN107119157A - The method that ore deposit batch and furnace top pressure are determined according to blast-furnace bosh coal gas volume index - Google Patents
The method that ore deposit batch and furnace top pressure are determined according to blast-furnace bosh coal gas volume index Download PDFInfo
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- CN107119157A CN107119157A CN201710288503.7A CN201710288503A CN107119157A CN 107119157 A CN107119157 A CN 107119157A CN 201710288503 A CN201710288503 A CN 201710288503A CN 107119157 A CN107119157 A CN 107119157A
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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
The method that ore deposit batch and furnace top pressure are determined according to blast-furnace bosh coal gas volume index, belongs to blast furnace ironmaking safe operation field, it is characterized in that：The ore deposit batch=46.71+2.65* furnace top underlinings+5~15, unit is t；The furnace top pressure=12.73+3.69* furnace top underlinings+15~30, unit is KPa；3500~5000m3The big blast furnace capping value of level, 1500~3500m3Level small furnace removes limit value.The present invention realizes the accurate positioning of ore deposit batch and furnace top pressure under different furnace top underlinings in blast furnace normal productive process；By improving ore deposit batch and furnace top pressure, fuel ratio is reduced, it is that the main way for realizing high utilization factor production is levied within the specific limits that furnace top underlining, which is controlled,.
Description
Technical field
The invention belongs to blast furnace ironmaking, blast-furnace bosh coal gas volume index technical field.
Background technology
With the development of China's steel industry, the economic benefit and strong competitiveness that large blast furnace is brought increasingly are dashed forward
Go out, the production operation progress basic research to large blast furnace is just particularly important, rational 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 is an important parameter for weighing intensification of smelting process in BF degree for learning in angle.
Analyze 52m of the blast-furnace bosh coal gas volume index by low level3/(min.m2) it is stepped up the 67m of a high position3/
(min.m2), how different working of a furnace features during production are inquired into by the Proper Match of operations system and operating concept
Change, to realize the control of rational furnace top underlining, so as to be blast furnace in high-coal ratio, high utilization factor production, formed
Realize that low-fuel ratio production provides guidance under higher furnace top underlining.
The characteristics of blast furnace process production has black box, although being mounted with substantial amounts of detection galvanic couple and stove on furnace body
Body pressure tap, but all fail directly to reflect the smelting process in blast furnace.
When blast furnace is normally produced, in order to realize that certain yield, coal compare level, 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
Occur various physics, chemical reaction with the wet part of air blast, so as to be formed by CO, N2And H2The gas flowrate in bosh that gas is combined into.Blast furnace exists
Different yield, coal are than that can form different gas flowrate in bosh under index.Gas flowrate in bosh divided by hearth area just obtain bosh
Coal gas volume index, it is a parameter for characterizing blast furnace process reinforcing degree.The difference of its furnace top underlining, characterizes one
The difference of blast furnace process state, thus causes its required ore deposit batch and furnace top pressure also will be different.
The content of the invention
The method that the present invention determines ore deposit batch and furnace top pressure according to blast-furnace bosh coal gas volume index, in order to Neng Gouzhun
When really pointing out that blast furnace is normally produced, the ore deposit batch size in blast furnace ironmaking process is determined under different furnace top underlinings
And furnace top pressure, operated with this Instructing manufacture, promote the direct motion steady in a long-term of blast furnace and the improvement of technical-economic index.
Technical scheme：
The method that ore deposit batch and furnace top pressure are determined according to blast-furnace bosh coal gas volume index, 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, it is compared with core formula:
In Bosh.G
In Bosh.G
In Bosh.G
In formula:
BV is cold flow (Nm3/min)；BH is humidification humidity (g/m3)；O2:Oxygen-enriched flow (Nm3/h)；Coal dust compression is empty
Tolerance (Nm3/min)；Coal powder blowing amount (Kg/h)；Coal dust amount containing H (%)；Oxygen concentration (99.6%).
The ore deposit batch=- 46.71+2.65* furnace top underlinings+5~15, unit is t；
The furnace top pressure=12.73+3.69* furnace top underlinings+15~30, unit is KPa.
The present invention realizes in blast furnace normal productive process ore deposit batch and furnace top pressure under different furnace top underlinings
Be accurately positioned.So as to change in traditional sense the unilateral cognition in blast furnace production process to ore deposit batch and furnace top pressure, accordingly
To instruct operation of blast furnace production, promote the production direct motion and the improvement of technical-economic index of large blast furnace.
On blast furnace operating, by improving ore deposit batch and furnace top pressure, fuel ratio is reduced, furnace top underlining control is existed
It is that the main way for realizing high utilization factor production is levied in certain limit.
Embodiment
Counted through production practice data, certain blast furnace is in 8300~10500m3Under/min gas flowrate in bosh, different ore deposit 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), ore deposit batch and furnace roof
Pressure is in positive dependency relation with furnace top underlining.According to the difference of furnace top underlining, ore deposit batch is also progressively by 120t
136t is progressively increased to, furnace top pressure is also stepped up 260KPa by 220Kpa.And recurrence obtains following 2 formula：
Ore deposit batch=- 46.71+2.65* furnace top underlinings+5~15, unit is t；
Furnace top pressure=12.73+3.69* furnace top underlinings+15~30, unit is KPa；
3500~5000m3The big blast furnace capping value of level, 1500~3500m3Level small furnace removes limit value.
Claims (1)
1. the method for ore deposit batch and furnace top pressure is determined according to blast-furnace bosh coal gas volume index, 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, it is compared with core formula:
In formula:
BV represents cold flow, and unit is Nm3/min；BH represents humidification humidity, and unit is g/m3；O2Represent oxygen-enriched flux unit
It is Nm3/h；The unit of coal dust air supply is Nm3/min；The unit of coal powder blowing amount is Kg/h；Coal dust amount containing H %；Oxygen
Concentration is 99.6%；
The ore deposit batch=- 46.71+2.65* furnace top underlinings+5~15, unit is t；
The furnace top pressure=12.73+3.69* furnace top underlinings+15~30, unit is KPa；
3500~5000m3The big blast furnace capping value of level, 1500~3500m3Level small furnace removes limit value.
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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 true CN107119157A (en) | 2017-09-01 |
| CN107119157B CN107119157B (en) | 2019-03-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176135A (en) * | 2020-09-15 | 2021-01-05 | 万洲电气股份有限公司 | Energy-saving optimization method and system based on blast furnace energy efficiency analysis |
| 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 |
| 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 |
Citations (3)
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| 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)
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| 唐顺兵 等: "太钢5号高炉合理煤气流的控制", 《四川冶金》 * |
| 那树人: "再谈高炉"炉腹煤气量指数"问题", 《内蒙古科技大学学报》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112176135A (en) * | 2020-09-15 | 2021-01-05 | 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 |
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| CN107119157B (en) | 2019-03-29 |
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