Method for joint measurement of calcium-barium content of silicon-barium alloy by using compleximetry

A silicon-barium alloy, complexometric titration technology, applied in the field of analytical chemistry, can solve the problems of shortening operation steps and operation time, adding many types of medicines, and complicated operation, so as to reduce energy consumption, reduce the types and amounts of additions, shorten the The effect of operating time

Inactive Publication Date: 2015-03-25
INNER MONGOLIA BAOTOU STEEL UNION
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  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of the existing methods for the determination of calcium and barium in silicon-barium alloys by dissolving samples separately, adding many types of medicines, taking a long time, and cumbersome operations, and providing a simple, a

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  • Method for joint measurement of calcium-barium content of silicon-barium alloy by using compleximetry

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Embodiment Construction

[0023] 1. Method summary:

[0024] Take a silicon-barium alloy sample, dissolve the sample with nitric acid-hydrofluoric acid, smoke with perchloric acid, dissolve the salt with hydrochloric acid, divide part of the sample with water, add masking agent to eliminate interfering elements, and use EDTA as the standard The solution was titrated to measure the content of calcium-barium and calcium respectively. The barium content was calculated by subtraction.

[0025] 2. Reagents:

[0026] Nitric acid (density 1.42 g / mL)

[0027] Hydrofluoric acid: (density 1.15g / mL)

[0028] Perchloric acid: (density 1.67g / mL);

[0029] Hydrochloric acid: (hydrochloric acid with a density of 1.19g / mL is mixed with an equal volume of water);

[0030] Triethanolamine solution: (the volume ratio of triethanolamine to water is 1:4);

[0031] Hydroxylamine hydrochloride (solid);

[0032] Ammonia water (mixture of ammonia water with a density of 0.90g / mL and an equal volume of water);

[0033] ...

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Abstract

The invention relates to a method for joint measurement of calcium-barium content of a silicon-barium alloy by using compleximetry. The method is characterized by comprising the following steps: dissolving a sample by using nitric acid and hydrofluoric acid; adding perchloric acid until smoke is generated; steaming until the sample is dried; dissolving salts by using hydrochloric acid, fixing volume by using water, then taking two samples, and adding a masking agent into the two samples respectively to eliminate interference elements; then mixing calcein with an indicator; performing titration by using EDTA (ethylene diamine tetraacetic acid) as a standard solution to measure the calcium-barium content and the calcium content respectively; and performing subtractive calculation to obtain the barium content. The method has the following advantages: by virtue of joint measurement, simultaneous measurements by one time of sample dissolving are realized, and successive measurements by two times of sample dissolving are not needed, so that the operation time is greatly shortened, and the operation is quick and accurate; by one time of sample dissolving, the labor capacity of workers is reduced, the added types and added amount of chemicals are greatly reduced, the cost is saved, the use frequency of a electric hot plate is reduced, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry and relates to a quantitative analysis method for calcium-barium joint measurement in silicon-barium alloy. Background technique [0002] Silicon-barium alloy is a new type of high-efficiency composite deoxidizer. During the deoxidation process, the three elements of silicon, calcium and barium promote each other, which effectively improves the utilization rate of the additive. It is mainly used in deoxidation and phosphorus removal in molten steel. It can make other complex oxides formed to float easily from the molten steel, purify the molten steel, and improve the impact toughness and processing performance of the steel. It can minimize the oxygen content in steel. Purify molten steel and improve the quality of steel. It has a good application prospect in the metallurgical industry. Therefore, it is very important to quickly and accurately determine the content of calcium and b...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 戴文杰刘建华常欢王宴秋
Owner INNER MONGOLIA BAOTOU STEEL UNION
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