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Method for measuring niobium content in iron ore

An iron ore and content technology, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc. Effect

Inactive Publication Date: 2014-12-24
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

A large amount of chemical reagents are used for the gravimetric determination and it takes 2 days to complete; a large amount of chemical reagents are required for the determination of niobium by the GB6730.47-86 chlorosulfonol S photometric method and the detection time is long

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  • Method for measuring niobium content in iron ore

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Embodiment Construction

[0021] The invention is an ICP-AES (inductively coupled plasma emission spectrometry) method for measuring the amount of niobium in iron ore, which can quickly measure the amount of niobium in the ore, not only has high sensitivity, low detection limit, fast measurement speed, and easy operation It is simple and has less interference than other methods, and has practical promotion significance.

[0022] Step 1: take the iron ore sample and melt it through the mixed flux (1.4);

[0023] Step 2: Leach with tartaric acid and hydrochloric acid at low temperature and set the volume to a certain volume, shake the liquid to be tested;

[0024] Step 3: use the niobium standard solution, select the same acid medium, prepare at least four working curve standard solutions for the determination of niobium content in a volumetric flask, and the niobium content of the test solution falls within the range of the working curve;

[0025] Step 4: On the inductively coupled plasma emission spec...

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Abstract

The invention discloses a method for measuring niobium content in iron ore. The method comprises the steps as follows: an iron ore sample is weighed and fused by a mixed fusing agent; the sample is subjected to leaching by tartaric acid and hydrochloric acid at the low temperature and dissolved to form constant volume, and a to-be-tested liquid is shaken well; a niobium standard solution is adopted to prepare at least four working curve standard solutions for measuring the niobium content in a volumetric flask under the condition of selected same acid medium, and the niobium content of the to-be-tested liquid is in the working curve range; and a niobium 269.706 nm analytical spectral line is selected for measuring spectral line intensity of niobium in the working curve standard solutions and the to-be-tested liquid simultaneously on an inductive coupling plasma emission spectrometer, and an analysis result is obtained. According to the method for measuring the niobium content in the iron ore, the operation process is simple and fast, and accurate data can be provided for component control in the smelting process.

Description

technical field [0001] The invention relates to a ferrous metallurgical analysis technique, in particular to a method for measuring niobium content in iron ore. Background technique [0002] Modern research shows that niobium has the effect of refining grains in steel, improving the toughness and strength of steel, and improving the intergranular corrosion of stainless steel. Niobium is one of the most widely used and most effective microalloying elements in modern steel. Adding a very small amount of niobium to ordinary steel can greatly improve the strength, corrosion resistance and oxidation resistance of steel, and reduce the brittleness of steel. transition temperature. In addition, niobium has a strong effect on carbon fixation in molten iron, so that steel has good hydrogen resistance. Therefore, niobium, as a trace element in steel, plays a very critical role in its properties. Baotou Baiyun Obo Coexisting Iron Mine has a large amount of niobium resources. The nio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 薛玉兰蒲显军刘钢耀刘建华
Owner INNER MONGOLIA BAOTOU STEEL UNION
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