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Method for representing high-phosphorus iron ore dynamic reaction stage

A high-phosphorus iron ore, reaction stage technology, applied in furnaces, furnace types, fluidized bed furnaces, etc., can solve the problems of difficult to accurate and stable information, incomplete testing methods, surface and crystal defects, etc., to achieve high sensitivity, Reliable and practical judgment and characterization method, the effect of the method is simple and convenient

Inactive Publication Date: 2012-10-31
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The metallurgical process involves extremely complex multiphase reactions, the testing methods at high temperatures are not yet complete, the information obtained is difficult to be accurate and stable, and intermediate products and metal products are often accompanied by segregation, harmful impurities, non-metallic inclusions, and surface and crystal defects Such problems make it difficult for the existing metallurgical reaction engineering theory to conduct correct and systematic analysis and research on these particularities.
At this stage, the traditional data of experience is still used to design metallurgical reaction equipment, and there are many problems to be studied and solved for the optimal operation and comprehensive automatic control of the existing metallurgical process system and equipment

Method used

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  • Method for representing high-phosphorus iron ore dynamic reaction stage
  • Method for representing high-phosphorus iron ore dynamic reaction stage

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Experimental program
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Embodiment 1

[0018] In the direct smelting reduction test of Huimin high phosphorus iron ore, the thermogravimetric experiment was used for analysis. The experimentally obtained differential thermal scanning calorimetry data is made into a dynamic map with VRA software (such as figure 1 ). It can be seen from the figure that [0, 3000] is the phase interface reaction stage, [3000, 5000] is the one-dimensional diffusion stage, and after 5000 points is the two-dimensional diffusion stage.

Embodiment 2

[0020] In the direct smelting reduction test of Luojing high-phosphorite iron ore, the thermogravimetric test was used for analysis. The experimentally obtained differential thermal scanning calorimetry data is made into a dynamic map with VRA software (such as figure 2 ). It can be seen from the figure that [0, 3200] is the phase interface reaction stage, [3200, 5500] is the one-dimensional diffusion stage, and after 5500 points is the two-dimensional diffusion stage.

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Abstract

The invention relates to the technical fields of metallurgical engineering and statistics, in particular relates to a method used for judging and representing a high-phosphorus iron ore reduction dynamic reaction stage. The invention is mainly applied to deconstruction of the high-phosphorus iron ore reduction dynamic reaction stage. The method comprises the following concrete steps: (1) placing a sample obtained by mixing high-phosphorus iron ore and a coal dust cosolvent on a thermogravimetry analyzer to perform a dynamic experiment; (2) extracting a differential thermal scanning calorimetric curve after the experiment is finished; (3) discretizing the curve obtained in (2) to form a time sequence, and importing the time sequence into VRA (visual recurrence analysis) software for analysis; and (4) judging the dynamic stage according to image features. The invention is applied to judging the high-phosphorus iron ore reduction dynamic stage, the method is simple and convenient and hashigh practical value, and a practical and reliable judging and representing method is provided for production practice and control on smelting of the high-phosphorus iron ore.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering and statistical technology, in particular to a judgment and characterization method suitable for the reaction stage of the reduction kinetics of high phosphorus iron ore. Background technique [0002] Metallurgical process dynamics is an engineering theoretical discipline that uses the theories and methods of chemical reaction engineering to study the rational design, optimal operation and optimal control of metallurgical processes and reaction equipment. It analyzes various characteristics of the metallurgical process on the basis of metallurgical process kinetics and transport theory, seeks the relationship between the main parameters in the process, and finds out its mathematical expression (mathematical model); according to various assumptions and experiments Conditions, use the computer to solve the quantitative relationship between the parameters, so as to determine the opt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00
Inventor 王华范国锋卿山
Owner KUNMING UNIV OF SCI & TECH
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