CN1105707A - 钢的最佳速度加热工艺 - Google Patents

钢的最佳速度加热工艺 Download PDF

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CN1105707A
CN1105707A CN 94110033 CN94110033A CN1105707A CN 1105707 A CN1105707 A CN 1105707A CN 94110033 CN94110033 CN 94110033 CN 94110033 A CN94110033 A CN 94110033A CN 1105707 A CN1105707 A CN 1105707A
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heating
steel
ingot
temp
time
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CN1040662C (zh
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鞠幼华
曹长吉
王慧君
胡嘉弟
宋玉扑
段才忠
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Research Institute Of Steel Of Anshan Iron And Steel Co
Angang Steel Co Ltd
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Research Institute Of Steel Of Anshan Iron And Steel Co
Angang Steel Co Ltd
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Abstract

本发明属于冶金企业轧钢加热工序。钢锭在加 热过程中提高加热炉温可缩短其加热时间，但需要大 的燃料流量，能耗增加；降低加热炉温可减少燃料流 量，但为达到钢锭出炉要求需延长加热时间，也导致 能耗增加。本发明通过研制不同炉窑、不同加热物料 的加热全过程数学模型，采用现代化微机技术仿真计 算确定钢的最佳加热参数，如初轧钢锭加热工艺降低 加热温度30～40℃，延长加热时间40～50min，但由 于降低了加热温度，还是使加热烧损减少，有明显的 节能效果。

Description

本发明属于冶金企业轧钢加热工序。
根据冶金热能工程理论，钢在加热过程中，提高冶金炉窑加热炉温可缩短其加热时间，但需要大的燃料流量，导致能耗增加;若降低加热炉温，可减少燃料流量，但为达到钢锭的出炉要求，需延长加热时间，也导致能耗增加。
根据数学分析中的极值原理，其中必定存在能耗最低的加热温度和加热时间，这同汽车有最佳的行驶速度是一个原理。
本发明的目的是确定最经济的加热参数，提供一个钢的最佳速度加热工艺，它能以最少的能耗和烧损实现钢的加热。
本发明的目的是这样实现的：通过研制不同冶金炉窑、不同加热物料受热全过程的热状态数学模型，采用现代化微机技术进行数十万个数据的离线仿真计算，对不同锭型、钢种和锭温的钢锭进行不同加热工艺的能耗量累计，作出曲线，呈抛物线形，找出抛物线最低点（极值点）就找到了经济加热参数（加热炉温、加热时间）。以均热炉加热锭温为600℃，钢种为低碳钢扁锭为例，其确定步骤如下：
（1）首先确定该钢锭各部温度场分布（对液芯锭还要确定凝固场分布），然后根据炉窑热平衡理论计算和实测，确定不同加热工艺（加热炉温、加热时间）的瞬时能耗曲线;
（2）根据该钢种和锭型的送轧要求，确定达到轧制需要（含过热量）的时间，对液芯锭除考虑温度场外，还要保证液芯率不大于6%，以防轧制胀钢事故;
（3）从装炉起至达到轧制要求止，累计不同加热工艺的能耗总值;
（4）将不同加热工艺的能耗总值逐个进行比较判断，求得能耗最低值（抛物线极值），确定该物料的经济加热参数，即加热炉温为1338℃，加热时间为5.17h。
其它各种锭温和钢种的最佳速度加热参数见表1。
Figure 941100332_IMG1
对不同的炉窑和加热物料执行特定的最佳速度加热工艺，对初轧均热炉来说，与普通烧钢工艺相比降低钢的加热温度30～40℃，延长加热时间40～50min。本发明虽需延长加热时间，但由于降低了加热温度，总的效果还是使加热烧损减少。
本发明实现了钢的最佳速度加热工艺，不仅可节约能耗，而且还可减少钢在加热过程中的氧化烧损，因为钢在加热过程中的氧化烧损与加热时间成正比例关系，与加热温度成三次方指数关系。该发明降低加热炉温30～40℃，有明显地减少烧损作用。
以上例为实施例，共轧制钢锭210万t，与普通工艺相比节能9.42%，减少烧损13%，创经济效益714万元。

Claims (1)

1、一种冶金炉窑钢的最佳速度加热工艺，其特征在于对不同的炉窑和加热物料执行特定最佳速度加热工艺，对初轧均热炉来说，与普通烧钢工艺相比降低钢的加热温度30～40℃，延长加热时间40～50min。
CN94110033A 1994-01-19 1994-01-19 一种轧钢加热方法 Expired - Fee Related CN1040662C (zh)

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CN94110033A CN1040662C (zh) 1994-01-19 1994-01-19 一种轧钢加热方法

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CN1040662C CN1040662C (zh) 1998-11-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7606601B2 (en) 2003-07-04 2009-10-20 Lg Electronics Inc. Fast call setup system and method in a mobile communications system
CN102051457A (zh) * 2009-10-29 2011-05-11 本特勒尔汽车技术有限公司 具有过热温度的室式炉

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8702689A (nl) * 1987-11-11 1989-06-01 Hoogovens Groep Bv Werkwijze voor het op walstemperatuur brengen van een aantal staalplakken en besturingsinrichting geschikt voor het uitvoeren van de werkwijze.
CN1052698A (zh) * 1989-12-21 1991-07-03 山西太原钢铁公司 专家系统在均热炉烧钢控制中应用

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7606601B2 (en) 2003-07-04 2009-10-20 Lg Electronics Inc. Fast call setup system and method in a mobile communications system
CN102051457A (zh) * 2009-10-29 2011-05-11 本特勒尔汽车技术有限公司 具有过热温度的室式炉
CN102051457B (zh) * 2009-10-29 2014-11-05 本特勒尔汽车技术有限公司 具有过热温度的室式炉

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