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A method for measuring carbon content in slag melting flux

A carbon content and flux technology, which is applied in the field of determining the carbon content in slag flux, can solve the problems of inconclusive high-frequency infrared carbon and sulfur analyzer working conditions, and no national standard sample for slag flux, and achieves a solution to the problem. Determination of difficult problems, reliable technical support, and good accuracy

Active Publication Date: 2019-06-04
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slag melting flux is in a powder state, so how to choose a suitable fluxing material to ensure the complete release of carbon is particularly important. How to determine the working conditions of the high-frequency infrared carbon and sulfur analyzer for carbon content analysis and measurement is still inconclusive; the slag melting flux There is no national standard sample, how to find an alternative standard sample is a difficult point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The instrument used in the measurement process is CS-3000 (Beijing Nanoco) high-frequency infrared carbon and sulfur analyzer. Analysis time is 50s; indoor relative humidity is not more than 60%.

[0035] 1) Prepare the spare parts for measurement: including the first standard material: pig iron machine character 91-029, carbon content: 2.39%; the second standard material: pig iron machine character 91-012B, carbon content: 1.75%; third standard material : Pig iron machine character 96-001, carbon content: 3.63%; blast furnace slag standard sample: TFe 0.21%, Al 2 O 3 9.05%, SiO 2 38.67%, MgO 4.07%, CaO4.59%, the blast furnace slag standard sample was calcined at 1050 ℃ for 2h in a muffle furnace before use, and then put into a desiccator for use after cooling; Porcelain crucible: PT type ￠25mm× 25mm; high-purity tungsten particle flux: C: <0.0008%; S: <0.0005%; pure iron flux: C: <0.0005%, S: <0.0005%;

[0036] 2) Determination of the blank value of carbon conten...

Embodiment 2

[0043] The instrument used in the measurement process is CS-3000 (Beijing Nanoco) high frequency infrared carbon and sulfur analyzer. Analysis time is 50s; indoor relative humidity is not more than 60%.

[0044] 1) Prepare the spare parts for measurement: including the first standard material: pig iron machine character 91-029, carbon content: 2.39%; the second standard material: pig iron machine character 91-012B, carbon content: 1.75%; third standard material : Pig iron machine character 96-001, carbon content: 3.63%; blast furnace slag standard sample: TFe 0.21%, Al 2 O 3 9.05%, SiO 2 38.67%, MgO 4.07%, CaO4.59%, the blast furnace slag standard sample was calcined at 1000 ℃ for 1h in a muffle furnace before use, and then put into a desiccator for use after cooling; Porcelain crucible: PT type ￠25mm× 25mm; high-purity tungsten particle flux: C: <0.0008%; S: <0.0005%; pure iron flux: C: <0.0005%, S: <0.0005%;

[0045] 2) Determination of the blank value of carbon conten...

Embodiment 3

[0052] The instrument used in the measurement process is CS-3000 (Beijing Nanoco) high frequency infrared carbon and sulfur analyzer. Analysis time is 50s; indoor relative humidity is not more than 60%.

[0053] 1) Prepare the spare parts for measurement: including the first standard material: pig iron machine character 91-029, carbon content: 2.39%; the second standard material: pig iron machine character 91-012B, carbon content: 1.75%; third standard material : Pig iron machine character 96-001, carbon content: 3.63%; blast furnace slag standard sample: TFe 0.21%, Al 2 O 3 9.05%, SiO 2 38.67 %, MgO 4.07%, CaO 4.59%, the blast furnace slag standard sample was calcined at 1000~1100 ℃ for 1~3h in a muffle furnace before use, and put into a desiccator for standby after cooling; Porcelain crucible: PT Type ￠25mm×25mm; high-purity tungsten particle flux: C: <0.0008%; S: <0.0005%; pure iron flux: C: <0.0005%, S: <0.0005%;

[0054] 2) Determination of the blank value of carbon...

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Abstract

The invention discloses a method for determining the carbon content in slag fluxing agent. According to the method, the carbon content is determined by a high-frequency infrared carbon-sulfur analyzer through a high-frequency induction combustion-infrared absorption method. The method comprises the following steps: preparing spares for determination; determining a carbon content blank value; calibrating the high-frequency infrared carbon-sulfur analyzer; sampling and preparing a sample; preparing a specimen; and measuring the carbon content in the slag fluxing agent powdered sample to be measured. According to the invention, the optimal fluxing agent is selected through fluxing agent experiment, so that carbon in the slag fluxing agent can be completely released, thereby improving the measuring accuracy. The method disclosed by the invention can be operated simply and quickly; the determination result is favorable in reproducibility and accuracy; the problem of determining the carbon content in the slag fluxing agent is solved; and a reliable technical guarantee is provided for quality control on iron and steel smelting.

Description

technical field [0001] The invention belongs to the technical field of quantitative analysis of elements, and in particular relates to a method for determining carbon content in a slag flux. Background technique [0002] In converter steelmaking, the speed of slag formation and the effect of slag formation directly affect the metallurgical effect of the smelting process. In order to improve the slag effect, the commonly used fluxes are iron oxide-containing materials such as fluorite, iron ore, and sludge balls. Fluorite slag is conducive to rapid slag formation, does not reduce the basicity of the slag, and has little influence on the heat balance. The slag is slow and has a great influence on the heat balance. In order to better improve the stability of smelting process control, improve the slag effect, and reduce production costs, new slag fluxes have been widely used in steelmaking and slag making operations. Carbon is one of the common elements in steel. Carbon in sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3563
CPCG01N21/3563
Inventor 李文生阚绍宽王磊许涯平欧阳光
Owner WUKUN STEEL
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