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Method for rapidly determining content of free carbon in casting powder

A technology for rapid measurement and mold slag, applied in measuring devices, material analysis by optical means, instruments, etc., can solve the problems of tediousness, long measurement time, difficult operation, etc., and achieve good accuracy, easy operation and reliable technology. Guaranteed effect

Active Publication Date: 2020-01-31
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the volume of the decomposition solution obtained by this method is small, it is beneficial to shorten the time for filtering and collecting free carbon, and improve the analysis efficiency of free carbon in continuous casting mold flux, but the whole test process is still relatively cumbersome, the measurement time is long, and the operation is difficult to master

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  • Method for rapidly determining content of free carbon in casting powder
  • Method for rapidly determining content of free carbon in casting powder
  • Method for rapidly determining content of free carbon in casting powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: The method for determining the content of free carbon in mold flux adopts the following specific process.

[0033] 1. Reagents required in the determination process: Mold flux standard sample YSBC26801-2013, total carbon content is 19.97wt%, free carbon content is 18.14wt%; mold flux standard sample YSBC26802-2013, total carbon content is 12.71wt%, free The carbon content is 9.94wt%; the mold flux standard sample YSBC26803-2013 has a total carbon content of 5.98wt% and a free carbon content of 4.06wt%; the mold flux standard sample YSBC26805-2013 has a total carbon content of 3.06wt% and a free carbon content of It is 1.57wt%; the carbon standard sample 502-029 was synthesized from the Lico calibration sample, and the carbon content is 1.01wt%; the special crucible for quartz was burned at 1000°C for 2 hours and then placed in a desiccator for use.

[0034] 2. Test steps:

[0035] (1) Analysis preparation: After the instrument is preheated and stabilized,...

Embodiment 2

[0046] Embodiment 2: The method for determining the content of free carbon in mold flux adopts the following specific process.

[0047] 1. The reagents required in the assay process are the same as in Example 1.

[0048] 2. Test steps:

[0049] (1) Analysis preparation: After the instrument is preheated and stabilized, check the environment monitoring (constant) in the diagnostic menu chart, carefully check whether each parameter is within the specified value, and find out the cause if there is an alarm signal such as an exclamation point before the parameter and Eliminate in time. Open the oxygen or nitrogen gas valve, and adjust the pressure reducing valve to 0.27MPa. Press "Gas on" on the operation interface to turn on the gas flow, and the sample analysis can be carried out after it has stabilized for about ten minutes.

[0050] (2) Method parameters: analysis method 1-Nitrogen, the carrier gas is nitrogen; analysis method 2-Oxygen, the carrier gas is oxygen; carbide fu...

Embodiment 3

[0056] Embodiment 3: The method for determining the content of free carbon in mold flux adopts the following specific process.

[0057] 1. The reagents required in the assay process are the same as in Example 1.

[0058] 2. Test steps:

[0059] (1) Analysis preparation: After the instrument is preheated and stabilized, check the environment monitoring (constant) in the diagnostic menu chart, carefully check whether each parameter is within the specified value, and find out the cause if there is an alarm signal such as an exclamation point before the parameter and Eliminate in time. Open the oxygen or nitrogen gas valve, and adjust the pressure reducing valve to 0.27MPa. Press "Gas on" on the operation interface to turn on the gas flow, and the sample analysis can be carried out after it has stabilized for about ten minutes.

[0060] (2) Method parameters: analysis method 1-Nitrogen, the carrier gas is nitrogen; analysis method 2-Oxygen, the carrier gas is oxygen; carbide fu...

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Abstract

The invention discloses a method for rapidly determining the content of free carbon in casting powder. The process comprises the following steps of: placing a casting powder sample in a crucible, heating the sample in an inert gas atmosphere until carbide in the sample is completely decomposed, placing the sample in an oxygen atmosphere after the sample is cooled, carrying out high-temperature firing, and determining and analyzing carbon in the sample by using a high-frequency infrared method, thereby obtaining the content of free carbon in the casting powder sample. The method disclosed by the invention is simple to operate, simple, convenient and rapid to operate, and good in reproducibility and accuracy of a measurement result, solves the problem of measurement of the content of the free carbon in the casting powder, and provides reliable technical support for quality control of steel smelting.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical analysis, in particular to a method for quickly measuring the content of free carbon in mold flux. Background technique [0002] Mold flux is usually used in steel and other smelting industries. In the molten steel smelting process, the mold slag mainly plays the role of heat insulation, insulation of air, prevention of secondary oxidation of molten steel, purification of steel slag interface, adsorption of sulfur and phosphorus inclusions in molten steel, lubrication of billet shell and improvement of solidification and heat transfer. Continuous casting The main component of mold flux is CaO. Accurate analysis of free carbon in continuous casting mold flux plays a very important role in improving the quality of continuous casting slab and the stability of continuous casting operation. Therefore, it is very important to quickly and accurately determine the content of free carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 禹青霄安治国刘洁任玲玲葛晶晶禹继志
Owner HEBEI IRON AND STEEL