Method for reducing air leak rate in iron ore sintering process

A technology of sintering process and air leakage rate, applied in the field of sintering, can solve the problems of difficult processing, increased energy consumption of sintering, and reduced pollutant emission concentration, and achieves the effect of increasing temperature, reducing exhaust gas volume and improving quality

Active Publication Date: 2017-05-31
临沂市钢铁产业协同创新中心 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Air leakage in the sintering process leads to increased sintering energy consumption, decreased pollutant emission concentration, and difficulty in handling, etc.

Method used

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  • Method for reducing air leak rate in iron ore sintering process
  • Method for reducing air leak rate in iron ore sintering process
  • Method for reducing air leak rate in iron ore sintering process

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a small part of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the present invention.

[0046] Taking a steel sintering machine as an example,

[0047] Use the standard gas to calibrate the flue gas analyzer, and the technical indicators of the flue gas analyzer are shown in Table 1 below. The flue gas flow rate and SO 2 For the concentration, the existing test hole can be used or the hole can be re-opened. After the hole is opened, the bolt can be tightened to seal it, which is convenient for re-measurement next time.

[0048] Table 1 Technical indicators of flue gas analyzer

[0049]

[0050] (a) Before the sintering flue to the ...

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Abstract

The invention relates to a method for reducing air leak rate in an iron ore sintering process. The method is characterized in that the method comprises following steps of (1) testing the smoke flow V1 and the SO2 concentration C1 of sintering of a main flue; (2) testing smoke flow V2 and SO2 concentration C2 before a sintering electrostatic dust collector, and testing smoke flow V3 and SO2 concentration C3 after the sintering electrostatic dust collector; (4) testing smoke flow V4 and SO2 concentration C4 before a sintering desulfurization inlet; (5) calculating the air leak rate of each part; and (6) carrying out leak stopping. According to the invention, leak stopping measures are taken according to the calculated air leak rate, so leaked air in the sintering process is greatly reduced, yield and quality of sintered ore are improved, electric energy consumption of a main air exhaust fan is reduced and yield of the sintered ore is increased.

Description

technical field [0001] The invention relates to the field of sintering, in particular to a method for reducing the air leakage rate from a sintering main flue to a flue gas dust removal and desulfurization system in an iron ore sintering process. Background technique [0002] In my country, the crude steel produced by the sintering-blast furnace-converter process accounts for about 80%, and the sintered ore accounts for about 75% of the blast furnace charge. SO produced during sintering 2 Emissions account for approximately 80% of the steel production process. Air leakage is common in the sintering production process, mainly due to wear and tear of pipes, thermal expansion and contraction deformation, poor sealing, and inadequate management. The air leakage rate varies from plant to plant. Air leakage in the sintering process leads to increased sintering energy consumption, decreased pollutant emission concentration, and difficult disposal. Reduce the air leakage rate, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28F27D21/00
CPCF27D21/00F27M2003/04G01M3/2807
Inventor 王海风张春霞齐渊洪严定鎏王锋高建军郄俊懋
Owner 临沂市钢铁产业协同创新中心
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