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Method for determining contents of carbon and sulfur in iron-containing dust mud
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A sulfur content, dust sludge technology, applied in measuring devices, material analysis through optical means, instruments, etc., to achieve the effect of increasing the reaction temperature, high precision, and lowering the melting point
Inactive Publication Date: 2015-04-01
INNER MONGOLIA BAOTOU STEEL UNION
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[0004] The purpose of the present invention is to solve the problem that the analysis requirements cannot be met when there is no suitable standard sample, and to provide a method that can accurately measure the carbon and sulfur content in iron-containing dust and sludge Method for Determination of Carbon and Sulfur Content in Iron-Containing Dust Sludge
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preparation example Construction
[0060] 1) Preparation of sulfur standard series
[0061] Weigh 2.174g (accurate to 0.0002g) of potassium sulfate (standard reagent) solid into a 100mL volumetric flask, add 20mL of high-purity water to dissolve, dilute to the mark, and shake well. At this time, the volume of the solution is 4.00mg. mL -1 .
[0062] Weigh 10.87g (accurate to 0.0002g) of potassium sulfate (standard reagent) solid into a 100mL volumetric flask, add 20mL of high-purity water to dissolve, dilute to the mark, and shake well. At this time, the volume of the solution is 20.00mg. mL -1 .
[0063] Use a micropipette to take different amounts of potassium sulfate reference solution (so that the sulfur content: low sulfur 0.002 at% to 0.500 at%, high sulfur 0.500 at% to 12.00 at% each 10 points) into the cleaned and dried tin capsule After drying at 80℃~90℃ for 2 hours, flatten and fold it, put it into a burnt crucible covered with 0.3 g of pure iron flux, and then cover with 1.5g of tungsten powder f...
Embodiment 1
[0073] Embodiment 1: method comparison
[0074] Method comparison experiments were carried out by using infrared absorption method and barium sulfate gravimetric method to measure sulfur content, combustion gas capacity to measure carbon content, and carbon dioxide absorption gravimetric method to measure carbon. The results are shown in Table 1
[0075] Table 1 method comparison at%
[0076]
Embodiment 2
[0077] Embodiment 2: standard addition method
[0078] Quantitatively weigh iron-containing dust samples, slag, and ore standard samples, add different amounts of potassium sulfate benchmarks, and use potassium sulfate benchmarks, ore, and slag standard samples to calibrate the working curve according to the method described under the same instrument conditions. (Using multi-point calibration) to determine the sulfur content in the sample. see table 2
[0079] Table 2 Accuracy at%
[0080]
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Abstract
The invention relates to a method for determining the contents of carbon and sulfur in iron-containing dust mud. The method is characterized by comprising the following steps: adding iron and tin fluxing agents into a special infrared sulfur-carbon crucible, adding an iron-containing dust mud sample with the mass of m into the crucible, and adding a tungsten fluxing agent; putting the crucible into a high-frequency infrared sulfur-carbon analyzer, heating the sample by virtue of a high frequency furnace in oxygen stream to respectively generate CO2, CO and SO2 from the carbon and the sulfur in the presence of the fluxing agents and oxygen, after carrying out dust filtration and dehumidification on the oxygen which serves as carrier gas, feeding the oxygen into an SO2 infrared absorption tank, and determining the content of the sulfur; and converting CO in the gas, which is subjected to SO2 measurement, into CO2 by virtue of a catalysis furnace, carrying out desulfuration, feeding the gas into the infrared absorption tank, and determining the content of the carbon. The method has the advantages that analysis steps are few, the chemical interference is slight, the analysis cycle is short, and the accuracy is high.
Description
technical field [0001] The invention belongs to the technical field of iron and steel metallurgy analysis, and relates to an infrared absorption method for measuring the carbon and sulfur contents in iron-containing dust and mud. Background technique [0002] Iron-containing dust sludge is the most important iron-containing waste resource for iron and steel enterprises, generally from steelmaking, ironmaking, steel rolling and other processes, mainly including sintering dust sludge, pellet dust sludge, blast furnace gas ash, blast furnace gas sludge, steelmaking dust sludge , converter sludge, electric (converter) furnace dust removal, cold (hot) rolling sludge, steel rolling oxide iron scale, furnace body bond, raw material yard dust collection and cast iron dust collection, etc.; these iron-containing dust sludge Containing high content of iron, carbon and a certain amount of zinc, it is a secondary resource worthy of regeneration, and also contains harmful components suc...
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