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Control method and system for sintering end point position

A technology of sintering end point and control method, applied in general control system, control/adjustment system, program control, etc., can solve problems such as affecting the quality of sinter, the end point of sintering cannot be guaranteed, and the output of sinter is fluctuating.

Active Publication Date: 2015-01-21
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, due to the influence of market factors, raw material storage factors, sinter storage factors, etc., the sinter output will fluctuate
This often leads to the fact that the sintering end point cannot be guaranteed to be at the preset fixed position, which ultimately affects the quality of sintering ore

Method used

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  • Control method and system for sintering end point position
  • Control method and system for sintering end point position
  • Control method and system for sintering end point position

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Please refer to the attached figure 2 , which shows the flow of the method for controlling the sintering end position provided by Embodiment 1 of the present invention.

[0039] figure 2 The process shown includes:

[0040] S101. Detect the flue gas temperature of each wind box.

[0041] The sintering end position refers to the position of the material on the sintering trolley when the sintering is completed, and is represented by the position of the bellows corresponding to the material layer when the material layer is burned through. It can be observed from the temperature of the flue gas passing through the material layer on the sintering trolley. Generally, the position where the temperature of the flue gas begins to drop is the sintering end point. In this step, a flue gas thermometer is used to detect the flue gas temperature of each wind box of the sintering system.

[0042] In the actual sintering process, each bellows of the sintering system is relatively...

Embodiment 2

[0058] Please refer to the attached image 3 , which shows the flow of the method for controlling the sintering end position provided by Embodiment 2 of the present invention.

[0059] image 3 The shown process also includes between steps S203 and S206:

[0060] S204. Obtain a preset sintering end point a.

[0061] S205. Determine whether the difference between the actual sintering end position b and the preset sintering end position a is greater than or equal to the preset threshold, if yes, go to step S206, otherwise, end the control operation.

[0062] In the actual sintering process, due to the complexity of the sintering system, production fluctuations and other factors, the various parameters of the system will change slightly. Therefore, the above optimal scheme takes into account the influence of various production factors to determine the actual sintering end position and preset Whether the difference of the sintering end position is greater than or equal to the p...

Embodiment 3

[0066] Please refer to the attached Figure 4 , which shows the flow of the method for controlling the sintering end position provided by Embodiment 3 of the present invention.

[0067] Figure 4 The process shown includes:

[0068] S301. Detect the flue gas temperature of each wind box in real time or periodically.

[0069] That is, according to the load change of the sintering system, the detection method or period of the flue gas temperature is selected, which can not only reflect the update or change of the flue gas temperature of each bellows in time, but also realize the timely adjustment of the frequency of the main exhaust fan, so that the system is stable and stable. timeliness to achieve the best balance. The time interval between two adjacent adjustments to the main exhaust fan t=K*S s / V t , where K is a constant coefficient, 0s is the length of the sintering trolley, in m, V t is the speed of the sintering trolley, in m / s.

[0070] Steps S302-S304 in the th...

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Abstract

The invention provides a control method for a sintering end point position, which comprises the steps of 1), detecting flue gas temperature of each air box, 2), determining the air box with the highest flue gas temperature and the corresponding flue gas temperature, and determining the air boxes front and rear adjacent to the air box with the highest flue gas temperature and the corresponding flue gas temperatures, 3), determining a practical sintering end point position, and 4), judging whether the practical sintering end point position is smaller than a preset sintering end point position, if so, reducing the frequency of a main exhaust fan, and if not, increasing the frequency of the main exhaust fan. The invention further provides a control system for the sintering end point position. The control method and the control system can ensure that a sintering end point is in the preset sintering end point position.

Description

technical field [0001] The invention relates to a sintering system control technology, in particular to a method and a system for controlling a sintering end position. 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 shown: various raw mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/401C22B1/16F27B21/14
Inventor 刘雁飞邱立运高鹏双袁立新
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD