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Rapid determination method for multiple component contents in mold flux

A continuous casting mold slag and rapid determination technology, which is applied in the field of metallurgy, can solve problems such as unfavorable human health and environmental protection, cumbersome determination process, and incomplete determination of elements, so as to achieve accurate and reliable measurement results, shorten the measurement cycle, and meet the actual requirements. The effect of job requirements

Inactive Publication Date: 2014-01-22
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The determination process is cumbersome, the analysis period is long, and the determination of elements is not comprehensive. It takes at least three days for analysts to complete the analysis of all components of continuous casting mold flux, which cannot meet the actual work requirements on site. Moreover, the wet chemical analysis process requires A large amount of chemical reagents are used, which is not conducive to human health and environmental protection

Method used

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  • Rapid determination method for multiple component contents in mold flux
  • Rapid determination method for multiple component contents in mold flux
  • Rapid determination method for multiple component contents in mold flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Weigh 0.1000g mold slag sample and place it in a platinum crucible covered with a layer of quantitative filter paper, put the crucible in a high-temperature muffle furnace below 300°C, heat it to 850°C for aerobic burning for 30min, and remove carbon and organic matter and sulfur in sulfides;

[0039]2) Transfer the pre-decarbonized mold residue sample into a tetrafluoroethylene microwave digestion tank, moisten the sample with deionized water, add 2 mL of nitric acid with a concentration of 65% to 68% by mass, and 5 mL of nitric acid with a concentration of 68% by mass. 36% to 38% hydrochloric acid, and 1mL hydrofluoric acid with a mass percentage concentration of 40% to 47%. Microwave digestion, the power of the microwave digestion system is 1200W, and the digestion pressure is 1-3Mpa, preferably 2MPa;

[0040] During the heating process of microwave digestion, first control the heating rate to 20°C / min, so that the temperature in the microwave digestion tank reac...

Embodiment 2

[0058] 1) Weigh 0.2000g mold flux sample and place it in a platinum crucible covered with a layer of quantitative filter paper, put the crucible into a high-temperature muffle furnace below 300°C, and heat it to 900°C for aerobic burning for 30min to remove carbon and organic matter and sulfur in sulfides;

[0059] 2) Transfer the pre-decarbonized mold residue sample into the digestion tank, place the microwave digestion tank in water at about 10°C, wet the sample with deionized water, add 5mL nitric acid, 5mL hydrochloric acid, and 1mL hydrogen in sequence Fluoric acid, nitric acid, hydrochloric acid and hydrofluoric acid are commercially pure. After the violent reaction is over, add 1mL of hydrofluoric acid, then install the lid of the digestion tank and carry out microwave digestion under airtight conditions. The power of the microwave digestion system is 1200W, the digestion pressure is 2.0MPa;

[0060] During the heating process of microwave digestion, first control the ...

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Abstract

A disclosed rapid determination method for multiple component contents in mold flux comprises the following steps: 1) carbon-removing pretreatment on mold flux; 2) sample dissolving by microwave digestion; 3) preparation of standard solutions of to-be detected components; 4) drafting of standard curves; and 5) determination on contents of the various components in mole flux. By combining microwave digestion sample dissolving technology and inductively coupled plasma emission spectrometry, the multiple component contents in mold flux are determined by one time; the rapid determination method has the advantages of being complete and rapid in reaction and low in blank value; the use amount of an agent is reduced by 50% or more; because microwave digestion is performed under the enclosed condition, the loss of to-be determined elements is reduced and laboratory pollution is reduced; the temperature is strictly controlled in the process of digestion, so that the accuracy of determination results is guaranteed; and the determination result is accurate and reliable, the operation is simple, the analysis speed is improved by 50% or more, the determination period is substantially shortened, and the rapid determination method satisfies comprehensive utilization of mold flux and practical operational requirements in production field.

Description

technical field [0001] The invention relates to metallurgical technology, in particular to a rapid determination method for multi-component content in continuous casting mold slag. Background technique [0002] As the medium of interaction between mold and slab, continuous casting mold flux is an important functional material in continuous casting production, which has a great influence on the smooth operation of continuous casting process and the improvement of slab quality. Mold fluxes of different types and uses are derived from different steel types, different casting machines, and different continuous casting process parameters. By changing the composition of the mold fluxes, the crystallization and thermal resistance of the flux film can be controlled, thereby effectively Control defects on the surface of the slab. Therefore, accurate determination of the chemical composition of mold flux is of great significance for the improvement of smelting process and the control...

Claims

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Application Information

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IPC IPC(8): G01N21/71G01N1/44
Inventor 邵梅闻向东陈士华张穗忠吴立新周郑谭谦赵希文文斌
Owner 武汉钢铁有限公司
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