阅读说明：本技术 一种通加湿调节高炉炉温的方法 (Method for adjusting temperature of blast furnace by introducing humidification ) 是由 卢保军 张金梦 马振军 王雪朋 王玉莲 弭希雨 杨雷 张作程 王智超 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种通过调节加湿量调剂高炉炉温的方法,包括以下步骤：通过高炉各参数判断高炉炉温变化趋势；根据炉温变化趋势调节高炉加湿量,炉温升高时增加加湿量,炉温降低时减少加湿量；当炉温变化≤0.2％,加湿量调整2g/m～(3)～4g/m～(3)；当炉温变化在0.2％～0.4％之间,加湿量调整4g/m～(3)～8g/m～(3)；当炉温变化≥0.4％,加湿量调整8g/m～(3)～12g/m～(3)；炉温趋势开始趋向于规定范围时,逐步恢复加湿量到原水平,且加湿量恢复时间不超过1小时；该方法避免了其它炉温调节方法速度较慢、效率较低的不足,也避免经验不足导致的调剂程度不足和方向失误。(The invention discloses a method for adjusting the temperature of a blast furnace by adjusting the humidification quantity, which comprises the following steps: judging the furnace temperature variation trend of the blast furnace according to various parameters of the blast furnace; adjusting the humidification quantity of the blast furnace according to the furnace temperature variation trend, increasing the humidification quantity when the furnace temperature rises, and reducing the humidification quantity when the furnace temperature falls; when the furnace temperature changes less than or equal to 0.2 percent, the humidification quantity is adjusted to be 2g/m 3 ～4g/m 3 (ii) a When the furnace temperature changes between 0.2 percent and 0.4 percent, the humidifying amount is adjusted to be 4g/m 3 ～8g/m 3 (ii) a When the furnace temperature changes by more than or equal to 0.4 percent, the humidification quantity is adjusted by 8g/m 3 ～12g/m 3 (ii) a When the furnace temperature trend begins to trend to a specified range, gradually restoring the humidification quantity to the original level, wherein the humidification quantity restoring time does not exceed 1 hour; the method avoids the defects of slow speed and low efficiency of other furnace temperature adjusting methods, and also avoids insufficient adjusting degree and direction errors caused by insufficient experience.)

1. A method for adjusting the temperature of a blast furnace by adjusting the humidification quantity is characterized by comprising the following steps:

1) judging the furnace temperature variation trend of the blast furnace according to various parameters of the blast furnace;

2) adjusting the humidification quantity of the blast furnace according to the furnace temperature variation trend, increasing the humidification quantity when the furnace temperature rises, and reducing the humidification quantity when the furnace temperature falls;

3) when the furnace temperature changes less than or equal to 0.2 percent, the humidification quantity is adjusted to be 2g/m³～4g/m³；

4) When the furnace temperature changes between 0.2 percent and 0.4 percent, the humidifying amount is adjusted to be 4g/m³～8g/m³；

5) When the furnace temperature changes by more than or equal to 0.4 percent, the humidification quantity is adjusted by 8g/m³～12g/m³；

6) When the furnace temperature trend starts to trend toward the prescribed range, the humidification amount is gradually restored to the original level, and the humidification amount restoration time does not exceed 1 hour.

Technical Field

The invention belongs to the technical field of blast furnace iron making, and particularly relates to a method for adjusting the temperature of a blast furnace by introducing humidification.

Background

The furnace temperature refers to the mass percentage of the silicon content of the molten iron in blast furnace ironmaking. The silicon content of the molten iron is in positive correlation with the fuel ratio consumed by the blast furnace (the kilogram number of the sum of the coke content (dry basis) and the coal powder content (dry basis) consumed by smelting one ton of molten iron), so that the fuel consumption can be reduced by reducing the furnace temperature. The reduced furnace temperature operation is a common practice for blast furnace operators.

In the production process of the blast furnace, the furnace temperature can be influenced by the coke ratio, the coal injection quantity, the hot air temperature, the furnace inlet air quantity, the humidification quantity and the oxygen enrichment quantity.

However, the action time of the charging coke ratio on the furnace temperature level of the blast furnace is a smelting period (the time of charging coke from the furnace top to the tuyere of the blast furnace is one smelting period), and for a large-scale blast furnace, the action time is about 7-8 hours, and the action time is not generally used as a means for regulating the furnace temperature of the blast furnace because the action time is long.

In the normal operation process, the fuel ratio is adjusted by adjusting the coal injection amount by blast furnace operators, the action time of adjusting the furnace temperature by adjusting the coal injection amount for a large-sized blast furnace is about 3.5-4 hours, and the experience requirement on the blast furnace operation is higher due to longer prejudgment time.

In the normal operation process, the adjustment changes of the hot air temperature, the air quantity entering the furnace, the humidification quantity and the oxygen-enriched quantity can generate great influence on the furnace condition of the blast furnace, and the blast furnace is generally used constantly and is not adjusted.

Because of insufficient operation experience of the blast furnace, the method adopted for regulating the furnace temperature is not scientific, and two situations usually occur, namely the furnace temperature is too conservative, and the furnace temperature is too high or too low for a long time and cannot reach the specified range; secondly, the furnace temperature is too aggressive when adjusting the furnace temperature, reaches the specified range within a short time, and then the process that the furnace temperature greatly exceeds the specified range occurs. Moreover, the furnace temperature is reduced or increased too severely, so that the phenomena of sliding rule, material collapse, pipeline stroke, furnace hearth freezing, material suspension and the like of the blast furnace occur, and serious harm is brought to the production of the blast furnace.

Disclosure of Invention

The invention aims to provide a method for adjusting the temperature of a blast furnace by humidification.

The technical scheme adopted by the invention for solving the technical problems is as follows: a method for adjusting the temperature of a blast furnace by adjusting the humidification quantity comprises the following steps:

1) judging the furnace temperature variation trend of the blast furnace according to various parameters of the blast furnace;

2) adjusting the humidification quantity of the blast furnace according to the furnace temperature variation trend, increasing the humidification quantity when the furnace temperature rises, and reducing the humidification quantity when the furnace temperature falls;

3) when the furnace temperature changes less than or equal to 0.2 percent, the humidification quantity is adjusted to be 2g/m³～4g/m³；

4) When the furnace temperature changes between 0.2 percent and 0.4 percent, the humidifying amount is adjusted to be 4g/m³～8g/m³；

5) When the furnace temperature changes by more than or equal to 0.4 percent, the humidification quantity is adjusted by 8g/m³～12g/m³；

6) When the furnace temperature trend starts to trend toward the prescribed range, the humidification amount is gradually restored to the original level, and the humidification amount restoration time does not exceed 1 hour.

The invention has the following beneficial effects: the method has the advantages that optimization innovation is carried out on the basis of taking measures of adjusting the furnace temperature such as adjusting coke load and coal injection amount, quantification operation is carried out, accurate adjustment is carried out, the furnace temperature adjusting speed is high, the efficiency is high, the problems that other furnace temperature adjusting methods are slow in speed and low in efficiency are solved, and the problems of insufficient adjustment degree and direction errors caused by insufficient experience are also avoided.

Detailed Description

The present invention will now be described in further detail.

A method for adjusting the temperature of a blast furnace by adjusting the humidification quantity comprises the following steps:

1) judging the furnace temperature variation trend of the blast furnace according to various parameters of the blast furnace;

2) adjusting the humidification quantity of the blast furnace according to the furnace temperature variation trend, increasing the humidification quantity when the furnace temperature rises, and reducing the humidification quantity when the furnace temperature falls;

3) when the furnace temperature changes less than or equal to 0.2 percent, the humidification quantity is adjusted to be 2g/m³～4g/m³；

4) When the furnace temperature changes between 0.2 percent and 0.4 percent, the humidifying amount is adjusted to be 4g/m³～8g/m³；

5) When the furnace temperature changes by more than or equal to 0.4 percent, the humidification quantity is adjusted by 8g/m³～12g/m³；

6) When the furnace temperature trend starts to trend toward the prescribed range, the humidification amount is gradually restored to the original level, and the humidification amount restoration time does not exceed 1 hour.

The method is optimized and innovated on the basis of the original measures of adjusting the furnace temperature such as adjusting coke load, coal injection amount and the like according to experience, quantitative operation is carried out, the adjustment is accurate, the furnace temperature adjusting speed is high, the efficiency is high, the defects of slow speed and low efficiency of other furnace temperature adjusting methods are avoided, and the defects of insufficient adjustment degree and direction error caused by insufficient experience are also avoided.

The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.