Furnace baking method for large converter

A drying method and technology for large-scale converters, which are applied in the field of converter lining and smelting, can solve the problems of single baking method, poor adaptability, lack of dynamic monitoring and adjustment mechanism, etc., and achieve a good location, low cost, reliable real-time monitoring data Effect

Pending Publication Date: 2022-07-12
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of single baking mode, poor adaptability, and lack of dynamic monitoring and adjustment mechanism in the prior art, the present invention proposes a large-scale converter baking method, which includes temperature monitoring during the whole baking process, and quantifies the gun position in the process. , flow, coke addition and timing control, timely feedback and quick adjustment when the baking effect deviates from the target window, so that environmental protection, safety and other related work can be effectively quantitatively controlled

Method used

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  • Furnace baking method for large converter
  • Furnace baking method for large converter
  • Furnace baking method for large converter

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Experimental program
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Effect test

Embodiment 1

[0046] In the drying method of a large converter of this embodiment, the flow rate of the skirt cover water supply, the water outlet temperature, the flow rate of the oxygen, the sub-lance and the flux feeding water jacket, the outlet water temperature, and the pressure of the deaerator must be closely monitored during the oven, so as to quantify the The process gun position, flow rate, coke addition amount and timing are controlled. When one of the following conditions is met, the furnace operation will be suspended when the gun is lifted. After recovery, the gun lifting point will be connected for time accumulation (that is, the fault processing time will not be counted), and continue to follow Table 1. and figure 1 Perform related operations, including:

[0047] A1. The water supply flow rate of the skirt cover is less than or equal to 120t / h or the outlet water temperature of the skirt cover is greater than or equal to 150℃, and the duration is more than 60 seconds;

[00...

Embodiment 2

[0055] A method for drying a large-scale converter of the present embodiment, the basic structure is the same as that of Embodiment 1, and the difference and improvement are: a method for drying a 300-ton converter, which specifically includes the following steps:

[0056] Step 1. After the furnace is built, the converter is kept vertically locked, and the residual bricks and other debris in the furnace are cleaned up;

[0057] Step 2, before the moving skirt trolley is in place, put about 3 tons of dry and miscellaneous wood materials for the oven into the furnace from the furnace mouth;

[0058] Step 3. Start the fan, and start the dust-removing washing and spraying system once;

[0059] Step 4. Add 30kg of fuel oil from the oxygen lance hole to the surface of the dry and miscellaneous wood in the furnace, then ignite the fuel-impregnated cotton yarn or rag torch, and add it into the furnace from the oxygen lance hole to ignite the wood; the oxygen lance is manually operated...

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Abstract

The invention discloses a furnace baking method for a large converter, and relates to the technical field of converter linings and smelting. The furnace baking method for the large converter comprises the steps that temperature monitoring is conducted in the whole baking process, and when the baking effect deviates from a target window, timely feedback and rapid adjustment are conducted. Two thermocouples are inserted into a tapping hole before the furnace is dried, and the thermocouples are connected with a temperature measuring instrument, so that real-time online monitoring of the temperature in the furnace is realized; in the furnace baking period, the skirt cover water supply flow, the water outlet temperature, oxygen, sublance and flux feeding water jacket flow, the water outlet temperature and the deaerator pressure need to be closely monitored, so that the lance position, the flow, the coke adding amount and opportunity control in the process are quantified, experience judgment is reduced, automatic and standardized operation is easy to achieve, the furnace baking effect is improved, and the production cost is reduced. And the occurrence of process safety and environmental protection accidents can be completely eradicated.

Description

technical field [0001] The invention relates to the technical field of converter lining and smelting, and more particularly relates to a drying method for a large converter. Background technique [0002] The converter lining consists of working layer, permanent layer and filling material. The working layer is directly in contact with the liquid metal, slag and furnace gas in the furnace. At present, most of the materials used for the working layer of the converter are magnesia-carbon bricks. The main raw materials are magnesia and graphite. The bricks are machine-pressed non-fired bricks; the permanent layer bricks are close to the steel plate of the furnace shell, and the material used for the permanent layer of the converter is magnesia bricks. The main raw material is magnesia with less impurities, usually machine-pressed and fired bricks; It is a bulk magnesium-containing refractory material, which is mainly used for gap filling in irregular areas or leveling to adjust ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/44C21C5/46
CPCC21C5/441C21C5/4673Y02P10/20
Inventor 徐小伟徐葆春李海波刘振雷
Owner MAANSHAN IRON & STEEL CO LTD
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