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A Method for Determining the First Iron Tapping of Blast Furnace Revival

A technology of blast furnace and iron output, applied in blast furnace, blast furnace details, furnace and other directions, can solve the problems of air volume usage and large fluctuation of iron volume without considering the rewind period

Active Publication Date: 2021-08-20
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of estimating the time interval after full gas induction of the blast furnace is adopted, and the use of air volume during the re-air period is not considered, and the iron volume fluctuates more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0060] Example 2 (2000m3 level blast furnace)

[0061] (1) Air consumption per ton of iron in normal production. The main parameters of the blast furnace during normal production, instrument air volume 3930m3 / min (note: not including oxygen enrichment), oxygen enrichment 7000m3 / h, atmospheric humidity 6g / m3, artificial humidification 5g / m3, average daily iron production 5250 tons / day .

[0062] Hourly artificial humidification volume flow rate=3930*60*5 / 803=1468m3 / h.

[0063] Oxygen per hour=3930*60*(1-6 / 803)*0.21+7000+(1468+3930*60*6 / 803)*0.5=57761m3 / h.

[0064] Oxygen consumption per ton of iron=57761*24 / 5250=264m3 / ton

[0065] Air consumption per ton of iron=264 / 0.21=1257m3 / ton.

[0066] (2) Air consumption per ton of iron during re-airing period. Oxygen consumption per ton of iron during recovery period = (1.1-1.13) * 264 ≈ 290m3 / t. Air consumption per ton of iron during recovery period=290 / 0.21=1380m3 / ton.

[0067] (3) Determine the amount of iron tapped for the fi...

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Abstract

The invention relates to a method for determining the first iron tapping of blast furnace revival, which belongs to the technical field of blast furnace ironmaking methods, and is used for determining the parameters of the blast furnace revival first iron tapping. The technical plan is: calculate and determine the hourly blast oxygen volume, oxygen consumption per ton of iron and air consumption per ton of iron according to parameters such as air volume, oxygen enrichment, humidification, and daily iron production; , fuel ratio (or carbon ratio), high carbon combustion rate, etc. to determine the air consumption per ton of iron; The cumulative air volume at that time, so as to determine the opening time. The present invention is the pioneer of the method for the first tapping of blast furnace rewinding. The opening time and tapping flow rate can be determined by adopting the method of the present invention. The labor intensity of the workers has greatly improved the production efficiency, avoided the occurrence of safety accidents, and ensured the smooth progress of production.

Description

technical field [0001] The invention relates to a method for determining the first iron tapping parameters of blast furnace revival, and belongs to the technical field of blast furnace ironmaking methods. Background technique [0002] After the blast furnace has been shut down for a long time to supply air, the issue of the opening of the first tapping in front of the furnace must be involved, mainly including two parameters of the opening time and the flow rate of the tapping. The heat of slag and iron in the hearth of Fufeng’s first tapping furnace is insufficient. If the tapping parameters are not well grasped, the opening time is too early or too late, or the tapping flow rate is too large or too small, not only the slag and iron in front of the furnace will not be discharged well, but also the furnace will be affected. status recovery progress. The opening time of the first tapping is too early, the tapping flow rate is too large, the tapping time is bound to be too sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00G06F17/10
CPCC21B5/00G06F17/10
Inventor 李志明李迎利霍志军赵勇贾镇汇邵久刚张文静
Owner HANDAN IRON & STEEL GROUP