Method for acquiring high temperature characteristics of iron ore powder in sintering process

Abstract

The invention relates to a method for acquiring high temperature characteristics of iron ore powder in a sintering process, belonging to the technical field of sintered ore powder monitoring. By adopting the CaO reagent, a sampling device, a sample mixer, a sample container and a high-temperature confocal microscope are utilized to acquire the high temperature characteristics of iron ore powder in the sintering process. The method comprises the following steps: respectively making -100 mesh powders from the iron ore powder and the CaO reagent in the sampling device, evenly mixing in the sample mixer to form a sample, and putting the sample on a platinum sheet; putting the platinum sheet to the bottom of an Al2O3 crucible, and putting the Al2O3 crucible under the high-temperature confocal microscope for observation; raising and lowering the temperature under the temperature schedule of simulating sintering temperature in the air atmosphere; and observing the reaction process of the iron ore powder and the CaO reagent, and determining the initial liquid-phase formation temperature and the liquid-phase solidification finish temperature according to the phenomena. In the invention, since the process is visible, the judgment on the key temperature spots is more accurate; since the whole process is observed, the judgment is more comprehensive, thereby reducing the times of tests and being beneficial to analysis on high temperature characteristics of different iron ore powders and realization of scientific optimal ore proportioning.

Description

technical field [0001] The invention belongs to the technical field of monitoring of sintered ore powder, and in particular relates to a method for obtaining the high-temperature characteristics of iron ore powder in the sintering process. The whole high-temperature process from phase formation to liquid phase solidification. Background technique [0002] As one of the most important raw materials of the blast furnace, the performance of sinter has an important influence on the technical and economic indicators of the blast furnace; and the performance of sinter depends to a large extent on the performance of its own raw material—iron ore powder . Since the caking effect and final performance of sinter depends largely on the physical and chemical reaction between iron ore powder and flux at high temperature, the high temperature performance of iron ore powder has attracted the attention of many researchers. [0003] In recent years, great progress has been made in optimizi...

AI Technical Summary

Problems solved by technology

[0005] Strictly speaking, because these two types of methods cannot directly observe the reaction between iron ore powder and flux at high temperature, it is not only difficult to accurately judge the temperature at which the initial liquid phase is formed and the temperature at which the liquid phase solidifies. The real-time change process of the reaction between iron ore powder and flux cannot be understood, and it is even more difficult to grasp how the liquid phase develops and how the liquid phase consolidates after the initial liquid phase is formed.

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