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Method and system for controlling sintering end point

A technology of sintering end point and control method, which is applied to furnace types, furnaces, lighting and heating equipment, etc., can solve the problems of inability to guarantee the quality of sintered ore, and the sintering end point cannot be in a preset position, and achieves a fast control response speed. Effect

Active Publication Date: 2015-03-11
ZHONGYE-CHANGTIAN INT ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the actual sintering production is affected by various factors, the sintering end point cannot be at the preset position, and thus the quality of sintering cannot be guaranteed

Method used

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  • Method and system for controlling sintering end point
  • Method and system for controlling sintering end point
  • Method and system for controlling sintering end point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Please refer to the attached figure 2 , figure 2 The flowchart of the method for controlling the sintering end point provided by Embodiment 1 of the present invention is shown.

[0058] figure 2 The process shown includes:

[0059] S101. Detect the distance a of the current sintering end point.

[0060] During the sintering production process, there is a certain thickness of sintered material on the sintering trolley, and the sintering material is sintered with the operation of the sintering trolley. Sintering end point. The distance from the sintering end point refers to the distance between the sintering end point and the initial position where the sintering material starts to sinter (usually a fixed position, such as the position of the feed port of the sintering trolley). Usually, in order to ensure the quality of sintering ore, different types of sintering materials have their own preset sintering end distance b, but in the actual sintering production proce...

Embodiment 2

[0108] As described in Example 1, the current effective wind rate can also be obtained by detecting the smoke composition of the large flue, please refer to the attached image 3 , image 3 The flowchart of the method for controlling the sintering end point provided by the second embodiment of the present invention is shown.

[0109] image 3 The process shown includes:

[0110] S202. Detect the smoke components of the large flue.

[0111] Step S202 usually uses a flue gas analyzer to detect the flue gas components after participating in the reaction. Of course, the flue gas composition of the large flue can be detected directly in the large flue, or can be calculated by detecting the flue gas composition of each bellows of the sintering system. The preferred scheme adopts the following technical scheme to detect the smoke components of the large flue:

[0112] a. Detect the flue gas composition of each bellows of the sintering system;

[0113] b. The average value of th...

Embodiment 3

[0126] Please refer to the attached Figure 4 , Figure 4 A specific process of adjusting the frequency of the main exhaust fan provided by Embodiment 3 of the present invention is shown.

[0127] Figure 4 The process shown includes:

[0128] S301. Establish a correspondence table between the absolute value of the difference between the standard effective wind rate and the current effective wind rate and the frequency adjustment amplitude of the main exhaust fan, where the absolute value is proportional to the frequency adjustment amplitude.

[0129] S302. Adjust the frequency of the main exhaust fan according to the corresponding table.

[0130] The adjustment in this step includes two operations of increasing and decreasing. Reduce the frequency of the main exhaust fan with step S106 in embodiment one, specifically can be adjusted as follows:

[0131] when , the frequency of the main exhaust fan is reduced by 1hz per minute.

[0132] when , the frequency of the ma...

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Abstract

The invention discloses a method for controlling a sintering end point. The method includes steps of 11), detecting a current sintering end point distance and a current effect air rate; 12), judging whether the current effective air rate is larger than or equal to a standard effective air rate when the current sintering end point distance is smaller than a preset sintering end point distance, entering a step 13) if the current effective air rate is larger than or equal to the standard effective air rate, or entering a step 14) if the current effective air rate is not larger than or equal to the standard effective air rate; 13), increasing the speed of a sintering trolley; 14), reducing the frequency of a main exhaust fan; 15), judging whether the current effective air rate is larger than or equal to the standard effective air rate or not when the current sintering end point distance is larger than the preset sintering distance, entering a step 16) if the current effective air rate is larger than or equal to the standard effective air rate, or entering a step 17) if the current effective air rate is not larger than or equal to the standard effective air rate; 16), increasing the frequency of the main exhaust fan and reducing the speed of the sintering trolley; 17), reducing the speed of the sintering trolley. The invention further discloses a system for controlling the sintering end point. The method and the system have the advantages that the sintering end point can be kept at a preset sintering end point position by the aid of the method and the system, and accordingly the quality of sintered ores can be improved.

Description

technical field [0001] The invention relates to the technical field of sintering production control, and more specifically, to a method and system for controlling the sintering end point. Background technique [0002] With the rapid development of modern industry, the scale of steel production is getting larger and larger, and energy consumption is also increasing. Energy conservation and environmental protection indicators have become an important factor in the steel production process. In iron and steel production, iron-containing raw material ore needs to be processed by sintering system before entering blast furnace smelting. , placed on the sintering trolley and roasted to cause a series of physical and chemical changes to form sintered ore that is easy to smelt. This process is called sintering. [0003] The sintering system mainly includes a sintering trolley, a mixer, a main exhaust fan, a ring cooler and other equipment. For the general process, see figure 1 As sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B21/14
Inventor 孙超高鹏双袁立新刘国同卢杨权申伟杰
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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