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Sintered ring cold machine air leakage rate on-line diagnostic method

A technology of sintering ring cooler and diagnosis method, which is applied in the direction of lighting and heating equipment, furnace types, instruments, etc., can solve the problem of unutilized, air volume distribution, sinter cooling effect cannot be known, cooling process affects sinter powder rate, power consumption Equipment life and other issues

Inactive Publication Date: 2008-10-22
BAOSHAN IRON & STEEL CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the cooling process will directly affect the powder rate of sinter, power consumption and equipment life, and the increase of powder rate will directly affect the output and cost of sinter
[0003] The distribution of air volume in each area of ​​the existing sintering ring cooler system and the cooling effect on sinter are unknown to people, and there is no good utilization

Method used

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  • Sintered ring cold machine air leakage rate on-line diagnostic method
  • Sintered ring cold machine air leakage rate on-line diagnostic method
  • Sintered ring cold machine air leakage rate on-line diagnostic method

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Experimental program
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Effect test

Embodiment

[0046] The hot air volume test of the ring cooler is difficult to measure in an environment with high temperature and high dust content; and the hot air in the open section is directly in contact with the atmosphere, there are many influencing factors in the test process, and the accuracy of the test results is low. Therefore, the entire annular cooler system is divided into six sections as subsystems to calculate separately, to try to calculate the ore temperature of each section, and to verify it by the heat loss of the entire system.

[0047] The sinter temperature of each node obtained through trial calculation is shown in Table 1.

[0048] Table 1 Sinter temperature of each node

[0049] Location

Entrance

1 o'clock

2:00

3 points

4 o'clock

5 o'clock

6 o'clock

exit

temperature, ℃

731.25

565.45

385.35

246.46

161.6

115.32

86.45

87.64

[0050] Trial calculation temp...

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Abstract

The invention relates to cooling control equipment for metallurgy in sintered ore preparation, in particular to a method for diagnosing the air leakage rate of a sintered ring cooling machine. The method for on-line diagnosing the air leakage rate of the sintered ring cooling machine comprises the following steps that: the sintered ring cooling machine is divided into a plurality of sections; beginning from a sintered ore inlet of each section, a hypothetic temperature of a node in an outlet of each section after the sintered ore is cooled is set; according to a thermal equilibrium method, the sintered ore temperature of each node is calculated step by step till the sintered ore temperature in the outlet is calculated out; the calculated result is compared with the actual measuring result; if the trial temperature error and the trial heat loss error of the sintered ore in the outlet are in a preset range, the calculation is terminated and the sintered ore temperature of each node can be obtained; if the errors are beyond the preset range, the node temperature is reset and the calculation is carried out again; according to the sintered ore temperature in each node, the ineffective air rate, that is the air leakage rate of each section, is further calculated; and the sum of the air leakage rate of the sections is the total air leakage rate. The method for diagnosing the air leakage rate of the sintered ring cooling machine provides foundation for controlling harmful air leakage.

Description

technical field [0001] The invention relates to cooling control equipment in the preparation of sintered ore for metallurgy, in particular to a diagnosis method for the air leakage rate of a sintering ring cooler. Background technique [0002] The current sintering process can generally be divided into stages such as mixture granulation, cloth distribution, draft ignition and sintering, cooling, and granulation. The cooling stage is to adopt a large area of ​​forced blast annular cooling, such as 460m 2 Forced blast ring cooling, the power consumption required for ring cooling accounts for 20-25% of sintering power consumption. The quality of sinter is not only related to the quality of original iron ore fines and sinter process control, but also related to the cooling process of sinter. The quality of the cooling process will directly affect the powder rate of sinter, power consumption and equipment life, and the increase of powder rate will directly affect the output and...

Claims

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Application Information

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IPC IPC(8): G01K17/08F27B5/18
Inventor 马洛文金永龙盛熔张立福毛晓明王跃飞李军
Owner BAOSHAN IRON & STEEL CO LTD
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