Complexometry joint measurement method for calcium, barium and magnesium contents in silico-calcium barium magnesium alloy

A complexometric titration, silicon calcium barium technology, applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem of high labor intensity, high consumption cost, long time consumption, etc. problems, to achieve the effect of saving manpower and costs, reducing analysis costs, and quickly and accurately determining

Inactive Publication Date: 2014-01-15
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

The measurement requires many people and multiple positions, which consumes a lot of cost, takes a long time, and is labor-intensive

Method used

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  • Complexometry joint measurement method for calcium, barium and magnesium contents in silico-calcium barium magnesium alloy
  • Complexometry joint measurement method for calcium, barium and magnesium contents in silico-calcium barium magnesium alloy
  • Complexometry joint measurement method for calcium, barium and magnesium contents in silico-calcium barium magnesium alloy

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Embodiment Construction

[0031] The general thought of the present invention: adopt nitric acid-hydrochloric acid-hydrofluoric acid to dissolve sample, add perchloric acid to strengthen decomposition ability, fumes drive away remaining nitric acid, hydrochloric acid, hydrofluoric acid after reaction, ammoniacal liquor separates iron, aluminum and other interference After the elements, the EDTA titration method is used to measure the calcium and magnesium content in the buffer system of pH = 10, and the calcium and calcium and barium content are respectively measured in the buffer system of pH = 12, realizing the simultaneous determination of calcium, barium, and calcium in a dissolved sample. The three elements of magnesium.

[0032] In the present invention, the reagent used is preferably:

[0033] The density of nitric acid is 1.42g / mL; the density of hydrofluoric acid is 1.15g / mL; the density of hydrochloric acid is 1.19g / mL; the density of perchloric acid is 1.67g / mL; the hydroxylamine hydrochlori...

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Abstract

The invention discloses a complexometry joint measurement method for calcium, barium and magnesium contents in a silico-calcium barium magnesium alloy. The method comprises the steps of preparing a sample solution of the alloy and a blank solution as a contrast, preparing a titration solution and a blank titration solution respectively with the sample solution and the blank solution, titrating the titration solution and the blank titration solution respectively with an EDTA (Ethylene Diamine Tetraacetic Acid) standard solution, and calculating the calcium, barium and magnesium contents in the alloy respectively according to the consumption of the EDTA standard solution, wherein the titration solution comprises a calcium blank titration solution, a calcium and barium titration solution and a calcium and magnesium titration solution, and the blank titration solution comprises a calcium blank titration solution, a calcium and barium blank titration solution and a calcium and magnesium blank titration solution. With the adoption of the method, the calcium, barium and magnesium contents can be simultaneously measured in the same solution only by once sample dissolving, and the method is easy and simple to operate.

Description

technical field [0001] The invention relates to the technical field of iron and steel alloy analysis, in particular to a method for jointly measuring the contents of calcium, barium and magnesium in a silicon-calcium-barium-magnesium alloy by complexometric titration. Background technique [0002] Silicon-calcium-barium-magnesium alloy is a new type of high-efficiency composite deoxidizer and desulfurizer, which is mainly used in deoxidation and phosphorus removal in molten steel. It can effectively remove impurities in steel by spheroidizing or refining inclusions in steel, change the properties of inclusions in steel, and reduce the harmful effects of non-metallic inclusions. Purify molten steel and improve the quality of steel. It plays an important role in the smelting of high-quality steel. It has a good application prospect in the metallurgical industry. Therefore, it is very important to determine the content of calcium, barium and magnesium in silicon-calcium-bari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 戴文杰常欢王宴秋刘建华刘钢耀
Owner INNER MONGOLIA BAOTOU STEEL UNION
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