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Optimization method for solving insufficient backflow air draft of blast furnace hot air pipeline

A technology of hot air pipeline and optimization method, which is applied in the direction of blast furnace, blast furnace details, blast furnace parts, etc., to achieve the effect of low cost and elimination of influence

Active Publication Date: 2019-12-31
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an optimized method for solving the insufficient backflow and exhaustion of the blast furnace hot blast pipe. The ventilation operation requires the special production situation of maintaining negative pressure in the area of ​​the hot blast main pipe. It has the characteristics of low cost, simplicity and high efficiency, and can prevent the impact on the maintenance schedule of the blast furnace due to insufficient suction of the hot blast pipe.

Method used

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  • Optimization method for solving insufficient backflow air draft of blast furnace hot air pipeline

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Embodiment 1

[0021] see figure 1 , the specific optimization steps are:

[0022] The first step is to confirm that the backflow valve 9 has been opened. If the hot blast branch pipe 7 is not effectively cut off from the blast furnace 1, before the backflow valve 9 is opened, the tuyere platform area and furnace top operators should be notified to evacuate, and a warning line should be pulled to prevent gas poisoning. It usually takes a long time to replace the hot blast valve 5, and it is recommended to effectively isolate the hot blast branch pipe 7 from the blast furnace 1, whether it is from the perspective of subsequent blast furnace production resumption or maintenance safety.

[0023] The second step is to select a hot blast stove with the highest vault temperature, and the hot blast valve 5 and the flue valve 6 can be opened normally to carry out the hot blast duct extraction operation. After opening the hot air valve 5 and the flue valve 6, the heat flow in the hot air main pipe ...

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Abstract

The invention relates to an optimization method for solving insufficient backflow air draft of a blast furnace hot air pipeline. The optimization method comprises the following optimization steps that1, a backflow valve is confirmed to be opened; 2, a hot blast stove with the highest dome temperature and a normally-opened hot blast valve and a normally-opened flue valve is selected for undergoinghot air pipeline air draft operation; 3, firstly, a hot air branch pipe and a blast furnace are effectively separated, the situation that heat in the furnace flows into the hot air pipeline through the hot air branch pipe is reduced, then according to the step 2, a hot blast stove with the highest dome temperature and a normally-opened hot blast valve and a normally-opened flue valve is selectedfor undergoing the hot air pipeline air draft operation, and the air draft effect after the operation is confirmed; and 4, the air draft amount is adjusted and controlled through the opening and closing of the flue valve. The optimization method for solving the insufficient backflow air draft of the blast furnace hot air pipeline not only is suitable for on-site production conditions of insufficient backflow draft fraught of the hot air pipeline, but also is suitable for special production conditions that a backflow pipeline and the backflow valve cannot carry out the backflow air draft operation.

Description

technical field [0001] The invention belongs to the technical field of blast furnace hot blast stove technology, and relates to an optimization method for solving the deficiencies of backflow draft of blast furnace hot blast pipes. Background technique [0002] In the process of replacing the blast furnace hot blast valve, both ends of the hot blast valve, that is, the side of the hot blast branch pipe close to the hot blast furnace body, and the side of the hot blast branch pipe close to the hot blast main pipe, must maintain a state of draft or negative pressure, so that the refractory material at the branch pipe port can be polished and the gasket treatment, etc. For operation, the draft force of the hot blast branch pipe on the side of the hot blast stove body is drawn by the hot blast stove body-flue-chimney, while the draft force of the hot blast branch pipe on the side of the hot blast main pipe is drawn by the hot blast main pipe-backflow valve. However, in actual pr...

Claims

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Application Information

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IPC IPC(8): C21B9/10C21B9/12
CPCC21B9/10C21B9/12
Inventor 杨国新李建东李鲜明黄恺邓华坚
Owner SGIS SONGSHAN CO LTD