Full-intelligent adjusting method for last furnace oxygen enrichment
An intelligent adjustment, oxygen-enriched technology, applied in blast furnace details, blast furnaces, furnaces, etc., can solve the problems of large movement range, difficult manual adjustment, and untimely, and achieve the effect of automatic adjustment
Active Publication Date: 2014-11-19
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology
[0002] Blast furnace oxygen enrichment is an essential step in the blast furnace smelting process, but the current blast furnace oxygen enrichment is all adjusted manually, which is neither timely nor accurate. At the same time, due to the mutual influence of flow regulating valve and pressure regulating valve, making Manual adjustment is very difficult
At the same time, the flow regulating valve and the pressure regulating valve are installed together, and the response time of the pressure to the flow change is close to zero. If the pressure and the flow are adjusted at the same time, then resonance will occur, and the flow will fluctuate up and down and appear divergent. The amplitude is getting larger and larger, and the regulation system cannot establish an equilibrium state without constraints
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Embodiment 1
[0015] During smelting, the oxygen-enriched pipeline pressure P is required to be 1.5 atmospheres, the oxygen-enriched flow rate is 3.8 cubic meters per minute, and the oxygen-enriched time is 15 minutes. Input the set value into the computer, and the computer observes whether the flow rate and pressure meet the requirements of 1.5±0.015 atmospheres and 3.8±0.038 cubic meters per minute, if satisfied, close the shut-off valve after 15 minutes.
[0016] During the oxygen enrichment process, it is observed that the pressure becomes 1.52 atmospheres, and the flow rate becomes 3.83 cubic meters per minute. At this time, the computer will adjust the pressure adjustment valve so that the pressure becomes 1.519 atmospheres. This adjustment makes the flow rate become 3.82 cubic meters per minute. , continue to adjust the pressure adjustment valve so that the pressure becomes 1.518 atmospheres, this adjustment makes the flow rate become 3.81 cubic meters per minute, continue to adjust t...
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The invention belongs to the field of control of a metallurgical automation process and particularly relates to a full-intelligent adjusting method for blast furnace oxygen enrichment. A pressure adjusting valve, a cutoff valve and a flow adjusting valve are installed on a blast furnace oxygen enrichment spray pipeline and are respectively in data connection to a computer, and the pressure adjusting valve, the cutoff valve and the flow adjusting valve are automatically adjusted by virtue of the computer, so that oxygen enrichment operations are completed. The method provided by the invention realizes automatic adjustment on blast furnace oxygen enrichment and meanwhile, the problem of resonance oscillation is solved in the adjusting process.
Description
technical field [0001] The invention belongs to the field of metallurgical automation process control, in particular to a fully intelligent adjustment method for oxygen enrichment of a blast furnace. Background technique [0002] Blast furnace oxygen enrichment is an essential step in the blast furnace smelting process, but the current blast furnace oxygen enrichment is all adjusted manually, which is neither timely nor accurate. At the same time, due to the mutual influence of flow regulating valve and pressure regulating valve, making Manual adjustments are very difficult. At the same time, the flow regulating valve and the pressure regulating valve are installed together, and the response time of the pressure to the flow change is close to zero. If the pressure and the flow are adjusted at the same time, then resonance will occur, and the flow will fluctuate up and down and appear divergent. The magnitude is getting larger and larger, and the regulation system cannot est...
Claims
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IPC IPC(8): C21B5/00
Inventor 崔金龙杨子荣赵新民郑毅
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD