A Method of Controlling Blast Furnace Gas Flow Distribution by Measuring Blast Furnace Ratio of Ratio of Raw Materials with Phased Array Radar

Abstract

The invention discloses a method for controlling the blast furnace gas flow distribution by using a phased array radar to measure the ore coke ratio of a blast furnace material surface. According to the method, the target O / C ratio distribution curves under different furnace conditions are firstly determined and gas flow adjusting case databases are established, the gas flow adjusting case database is selected and the adjusting principle is determined, the O / C ratio distribution condition of the furnace top material distribution is directly calculated under the premise of consideration of the furnace material descending, the influence of the bottom layer material surface shape, and the influence of the furnace material collapsing, and by comparing the corresponding relationship between the material distribution and the gas flow distribution and by controlling the furnace top gas flow distribution through the targeted material distribution, the precise gas flow adjusting is achieved, and the empirical blast furnace top gas flow control is improved to the quantification level so as to achieve the stable and smooth operating of the blast furnace.

Description

technical field [0001] The invention belongs to the technical field of blast furnace operation, in particular to a method for controlling the gas flow distribution of the blast furnace by using a phased array radar to measure the ore-coke ratio of the blast furnace material surface. Background technique [0002] As a multi-variable, large-lag, non-linear super-large convective reactor for molten iron production, the blast furnace consumes a huge amount of material and energy every day. With a 5000m 3 Take the large-scale modern blast furnace as an example. Every day, about 12,000 tons of pig iron will be produced, about 20,000 tons of ore will be consumed, about 6,000 tons of fuel will be burned, about 4,000 tons of slag will be produced, and about 25,000 tons of CO will be produced. 2 , The huge material flow and energy flow will be completed in the blast furnace within 24 hours. Such a huge material, energy, and information exchange in the blast furnace has always been don...

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Problems solved by technology

"Provides a method for constructing a mathematical model of material distribution using particle flow theory. This method can calculate the shape of the material surface after the material is distributed. However, since the real rolling process of furnace material particles is difficult to simulate, this method is only a schematic model construction method. As Scientific research is ok, so not very useful in practice

[0011] The main means of controlling the air flow in the upper part of the blast furnace is to adjust the material distribution. Due to the large amount of material distribution in the blast furnace at one time, the distribution process of the charge in the furnace is affected by various factors such as the drop of the charge, the shape of the bottom surface of the charge, the rise of the air flow, heat transfer, rolling and sliding of the charge, etc. The cloth formation process is relatively complicated, and different cloth patterns can obtain the same shape of the material surface. In view of the lack of direct detection equipment for the material surface, it is difficult to obtain detailed information on the distribution of the furnace charge, which has caused great difficulties for accurate cloth distribution. Adjusting the airflow distribution is still in the empirical stage, especially the fine adjustment

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