Method for measuring iron content in steel slag

Abstract

The invention provides a method for measuring iron content in steel slag. The method includes grinding and screening a steel slag sample by multiple times; completely separating granular metal substances from slag in the steel slag sample; measuring the mass of the granular metal substances by a physical process; measuring iron content of the slag by a titanium trichloride and potassium dichromate volumetric process; and computing the full iron content of the steel slag sample via data of the iron content of the slag and the mass of the granular metal substances. The method has the advantages of convenience in operation, high accuracy of the measured iron content and good stability, repeatability and accuracy of a measuring result. Besides, as proved by tests, the method is reliable and practical, and the requirement on measuring iron content in steel slag in daily life can be met.

Description

[0001] technical field

[0002] The invention relates to a measuring method, in particular to a method for detecting iron content in steel slag, and belongs to the technical field of analysis and testing. Background technique

[0003] In order to provide timely information on the process control quality of the steel slag magnetic separation production line, and to judge the quality of the processed steel slag at all levels to determine its reuse trend, it is necessary to detect the total iron content of the steel slag. Currently, relevant slag analysis methods only analyze slag. The ferrous metallurgical industry standard that is being formulated—the chemical analysis method of steel slag stipulates that the steel slag sample used for chemical analysis should be a representative uniform sample, and the steel slag entering the mill should be divided into about 50 g ~ 100 g by quartering method, crushed Grind, pass through a 0.080mm square hole sieve, use a magnet to absorb t...

Examples

Embodiment 1

[0032] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0033] B, the 100g steel slag particles of step A are ground for 60 seconds, cross a 10 mesh sieve, grind the oversize for 90 seconds, cross a 10 mesh sieve; grind the oversize for 30 seconds, cross a 10 mesh sieve, combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.17g;

[0034] C. Grind the under-sieve powder of step B for 60 seconds and pass through a 40-mesh sieve; grind the over-sieve for 90 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 30 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =6.73g;

[0035] D, the slag powder under th...

Embodiment 2

[0050] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0051] B, the 100g steel slag particles of step A are ground for 50 seconds, cross a 10 mesh sieve, grind the oversize for 100 seconds, cross a 10 mesh sieve; grind the oversize for 20 seconds, cross a 10 mesh sieve, and combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.83g;

[0052] C. Grind the under-sieve slag powder of step B for 50 seconds and pass through a 40-mesh sieve; grind the over-sieve for 100 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 20 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =7.16g;

[0053] D, the slag powd...

Embodiment 3

[0068] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0069] B, the 100g steel slag particles of step A are ground for 70 seconds, cross a 10 mesh sieve, grind the oversize for 90 seconds, cross a 10 mesh sieve; grind the oversize for 40 seconds, cross a 10 mesh sieve, and combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.33g;

[0070] C. Grind the under-sieve slag powder of step B for 70 seconds and pass through a 40-mesh sieve; grind the over-sieve for 80 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 40 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =6.88g;

[0071] D, the slag powder...

[0001] technical field

[0002] The invention relates to a measuring method, in particular to a method for detecting iron content in steel slag, and belongs to the technical field of analysis and testing. Background technique

[0003] In order to provide timely information on the process control quality of the steel slag magnetic separation production line, and to judge the quality of the processed steel slag at all levels to determine its reuse trend, it is necessary to detect the total iron content of the steel slag. Currently, relevant slag analysis methods only analyze slag. The ferrous metallurgical industry standard that is being formulated—the chemical analysis method of steel slag stipulates that the steel slag sample used for chemical analysis should be a representative uniform sample, and the steel slag entering the mill should be divided into about 50 g ~ 100 g by quartering method, crushed Grind, pass through a 0.080mm square hole sieve, use a magnet to absorb t...

Examples

Embodiment 1

[0032] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0033] B, the 100g steel slag particles of step A are ground for 60 seconds, cross a 10 mesh sieve, grind the oversize for 90 seconds, cross a 10 mesh sieve; grind the oversize for 30 seconds, cross a 10 mesh sieve, combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.17g;

[0034] C. Grind the under-sieve powder of step B for 60 seconds and pass through a 40-mesh sieve; grind the over-sieve for 90 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 30 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =6.73g;

[0035] D, the slag powder under th...

Embodiment 2

[0050] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0051] B, the 100g steel slag particles of step A are ground for 50 seconds, cross a 10 mesh sieve, grind the oversize for 100 seconds, cross a 10 mesh sieve; grind the oversize for 20 seconds, cross a 10 mesh sieve, and combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.83g;

[0052] C. Grind the under-sieve slag powder of step B for 50 seconds and pass through a 40-mesh sieve; grind the over-sieve for 100 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 20 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =7.16g;

[0053] D, the slag powd...

Embodiment 3

[0068] A. After drying the steel slag sample to constant weight, process it with a crusher until the particle size is less than 5mm, and use a splitter to shrink it. Considering that the sample size must be representative and the volume of the grinding bowl should be taken into account, the sample is determined. Quantity (M 0 ) is 100g;

[0069] B, the 100g steel slag particles of step A are ground for 70 seconds, cross a 10 mesh sieve, grind the oversize for 90 seconds, cross a 10 mesh sieve; grind the oversize for 40 seconds, cross a 10 mesh sieve, and combine the slag powder under the sieve, Weigh the sieve to get M 1 =42.33g;

[0070] C. Grind the under-sieve slag powder of step B for 70 seconds and pass through a 40-mesh sieve; grind the over-sieve for 80 seconds and pass through a 40-mesh sieve; then grind the over-sieve for 40 seconds, pass through a 40-mesh sieve, and combine the under-sieve slag Powder, weigh the sieve, get M 2 =6.88g;

[0071] D, the slag powder...

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