Method for determining position of root of blast furnace cohesive zone through multi-source information fusion

Abstract

The invention provides a method for determining the position of the root of a blast furnace cohesive zone through multi-source information fusion. The method specifically includes the following steps that A gas is taken along the different heights of a blast furnace body, a distribution curve, along the height, of gas utilization rates is drawn, and when the gas utilization rate is zero, the elevation position of the gas utilization rate is obtained through a numerical computation method; B a distribution relation model, in the height direction, of the temperature of the hot surface of a furnace wall of the blast furnace is built, and the area where the temperature of a cooling wall changes obviously is obtained; C the soft melting temperature of a furnace burden corresponding to a furnace burden grade during measurement of A and B is analyzed and determined according to the soft melting temperatures of different furnace burden grades; D the distribution relation model, in the height direction, of the temperature of the hot surface of the furnace wall of the blast furnace is used as main-source information and conclusions of A and C are used as auxiliary information for computing the position of the root of the cohesive zone. By means of the method, according to detectable data, a temperature field distribution model of the hot surface of the furnace wall of the blast furnace, the elevation position where the CO utilization rate is zero and the soft melting temperature of the furnace burden of the blast furnace during data measurement are obtained, the position of the root of the blast furnace cohesive zone is worked out, and the method has the advantages of being small in equipment investment, high in detection precision and the like.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a method for determining the position of the root of a blast furnace reflow zone through multi-source information fusion. Background technique [0002] Blast furnace smelting, as the upstream process of steel production process, is the main source of CO in steel production. 2 The main discharge process and the link with the largest energy consumption. The reflow zone in the blast furnace not only dominates the gas flow distribution, directly affects the utilization of blast furnace gas, but also has a great influence on the heat exchange, reduction process and air permeability in the furnace. Blast furnace anatomy and experimental simulation have confirmed its existence. The reflow property of charge and blast furnace operating system are the main factors affecting the position and shape of the reflow zone. The refractory zone model is an intuitive reflection and importan...

AI Technical Summary

Problems solved by technology

Due to limitations in capital and technology, few domestic blast furnaces are equipped with detection devices, and the detection technology for the position and shape of the reflow zone is still very backward.

At present, blast furnace operators mainly estimate the approximate position of the root of the reflow zone by referring to measurement data such as blast furnace gas composition, furnace top pressure, furnace top temperature, furnace throat cross temperature measurement, stave temperature, and molten iron temperature, combined with operating experience, which is difficult to give exact result

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