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Hot rolling heating furnace and local strengthening heating control method thereof

A local strengthening and heating control technology, applied in the field of hot rolling heating, can solve the problems of not being able to greatly reduce energy consumption, meet the high requirements of hot rolling heating quality and energy saving, and achieve the effect of improving uniformity and ensuring heating quality

Active Publication Date: 2013-11-13
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the traditional hot rolling heating furnace has been unable to greatly reduce energy consumption, and the full heat storage and full pulse heating furnaces have exposed many deficiencies during use, which cannot meet the high requirements of hot rolling heating quality and energy saving

Method used

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  • Hot rolling heating furnace and local strengthening heating control method thereof
  • Hot rolling heating furnace and local strengthening heating control method thereof
  • Hot rolling heating furnace and local strengthening heating control method thereof

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Embodiment 1

[0061] Carbon steel standard slab: 230×1400×10000mm, cold charging, hourly output 320t / h, target temperature of slab at the end of preheating section 900℃, target temperature of unloading 1200℃, target temperature of smoke exhaust in heat recovery section 600℃. In the current control state, the total fuel input is 48626Nm 3 , of which the preheating section is 16153N m 3 , heating section 21549N m 3 , soaking section 10924N m 3 , the actual exhaust gas temperature is 551 degrees, the predicted end temperature of the preheating section is 850 degrees, the actual temperature at the end of the preheating section is 836 degrees, and the actual temperature of the furnace is 1198 degrees.

[0062] The heat feed-forward compensation weight δ is 0.5, and the heating efficiency λ is 0.9. The heating furnace provided by the present invention is used for heating, the heating section adopts the heat storage pulse control method, the soaking section adopts the conventional control metho...

Embodiment 2

[0080] Carbon steel standard slab: 230×1400×10000mm, hot charging at 400 degrees, hourly output 350t / h, target temperature of billet at the end of preheating section 900 degrees, furnace target temperature 1200 degrees, heat recovery section smoke target temperature 600 degrees. In the current control state, the total fuel input is 43128Nm 3 , of which the preheating section is 16047Nm 3 , heating section 18184Nm 3 , soaking section 8897Nm 3 , the actual exhaust gas temperature is 612 degrees, the predicted end temperature of the preheating section is 950 degrees, the actual temperature at the end of the preheating section is 933 degrees, and the actual furnace temperature is 1208 degrees.

[0081] The heat feed-forward compensation weight δ is 0.5, and the heating efficiency λ is 0.9. The heating furnace given in this patent is used for heating. The heating section adopts the heat storage pulse control method, the soaking section adopts the conventional control method, and...

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Abstract

The invention discloses a hot rolling heating furnace; and the hot rolling heating furnace is designed by comprising a furnace tail section, a preheating section, a heating section and a heat average section. The invention also discloses a local strengthening heating control method of the hot rolling heating furnace; an impulse burner is arranged at the preheating section, a constant combustion mode is adopted, the input amount of the impulse burner can be controlled according to the heat demand of the preheating section to make the burner to maintain an optimal combustion state, and the purpose of local strengthening heating can be achieved, so that temperature uniformity of the furnace width direction can be improved, the heating quality can be ensured and the energy saving purpose can be achieved.

Description

technical field [0001] The invention relates to hot rolling heating technology, more specifically, to a hot rolling heating furnace and a local enhanced heating control method thereof. Background technique [0002] At present, common hot rolling heating furnaces include: conventional heating furnace, regenerative heating furnace and pulse heating furnace. The regenerative heating furnace has certain advantages in terms of energy saving in the case of using low calorific value gas, uniformity of furnace temperature in the furnace width direction, and reduction of NOX emissions; but for conventional hot rolling, the energy saving effect of the regenerative heating furnace is not obvious, and the emission Smoke temperature is high. The disadvantage of conventional heating furnace flow regulation is that there is a regulation dead zone, and when the temperature fluctuates greatly, the combustion situation becomes worse; conventional burners also have advantages, such as the fla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/70B21B1/26
Inventor 吕立华邓龙秦建超王彦峰
Owner BAOSHAN IRON & STEEL CO LTD
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