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Chemical phase analysis method for passivated magnesium

A technology of chemical substance and phase analysis, which is applied in the direction of chemical reaction of materials, material analysis by observing the influence of chemical indicators, preparation of test samples, etc., which can solve the problems of cumbersome operation and long time consumption , to achieve the effect of simple operation, fast method and good practicability

Inactive Publication Date: 2014-12-24
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of cumbersome operation and long time-consuming in the existing method for measuring magnesium content in passivated magnesium, and provide a passivated magnesium chemical phase analysis method with simple operation and high accuracy, so as to quickly and accurately measure The content of metallic magnesium and magnesium oxide in passivated magnesium

Method used

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  • Chemical phase analysis method for passivated magnesium
  • Chemical phase analysis method for passivated magnesium
  • Chemical phase analysis method for passivated magnesium

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1) Weigh 0.1000g of the sample into a 250ml Erlenmeyer flask, add 4g of iodine, 50ml of methanol, heat in a water bath (50-60°C), electromagnetically stir, and reflux for 40 minutes to obtain a sample solution.

[0025] 2) Filter the sample solution with a slow filter paper, rinse the precipitate on the slow filter paper with methanol until the precipitate is colorless, and collect the filtrate in a 250 ml beaker.

[0026] 3) Put the precipitate together with the filter paper into a 250ml Erlenmeyer flask, add 10ml of concentrated nitric acid and 5ml of concentrated perchloric acid, heat and nitrify in a medium temperature furnace, and blow perchloric acid fumes until nearly dry.

[0027] 4) Cool the precipitate that the concentrated perchloric acid has smoked, add 5 milliliters of concentrated hydrochloric acid to dissolve the salts, transfer to a 100 milliliter volumetric flask, and dilute to the mark with water to obtain a magnesium oxide test solution.

[0028] 5) P...

Embodiment 2

[0038] 1) Weigh 0.1500g of the sample into a 250ml Erlenmeyer flask, add 6g of iodine and 80ml of methanol, heat in a water bath (50-60°C), electromagnetically stir, and reflux for 45 minutes to obtain a sample solution.

[0039] 2) Filter the sample solution with a slow filter paper, rinse the precipitate on the slow filter paper with methanol until the precipitate is colorless, and collect the filtrate in a 250 ml beaker.

[0040] 3) Put the precipitate together with the filter paper into a 250ml Erlenmeyer flask, add 20ml of concentrated nitric acid and 8ml of concentrated perchloric acid, heat and nitrify in a medium-temperature furnace, and emit perchloric acid fumes until nearly dry.

[0041] 4) Cool the precipitate that the concentrated perchloric acid has smoked, add 5 milliliters of concentrated hydrochloric acid to dissolve the salts, transfer to a 100 milliliter volumetric flask, and dilute to the mark with water to obtain a magnesium oxide test solution.

[0042] 5...

Embodiment 3

[0052] 1) Weigh 0.2000g of the sample into a 250ml Erlenmeyer flask, add 8g of iodine and 100ml of methanol, heat in a water bath (50-60°C), stir electromagnetically, and reflux for 50 minutes to obtain a sample solution.

[0053] 2) Filter the sample solution with a slow filter paper, rinse the precipitate on the slow filter paper with methanol until the precipitate is colorless, and collect the filtrate in a 250 ml beaker.

[0054] 3) Put the precipitate together with the filter paper into a 250ml Erlenmeyer flask, add 30ml of concentrated nitric acid and 10ml of concentrated perchloric acid, heat and nitrify in a medium-temperature furnace, and emit perchloric acid fumes until nearly dry.

[0055] 4) Cool the precipitate that the concentrated perchloric acid has smoked, add 5 milliliters of concentrated hydrochloric acid to dissolve the salts, transfer to a 100 milliliter volumetric flask, and dilute to the mark with water to obtain a magnesium oxide test solution.

[0056] 5...

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Abstract

The invention discloses a chemical phase analysis method for passivated magnesium. The chemical phase analysis method comprises the following steps: utilizing the characteristic that the magnesium metal in a specimen can take a reaction with iodine to generate magnesium iodide to be dissolved in methyl alcohol, so as to effectively separate out the magnesium metal from the specimen, enabling the magnesium oxide in the precipitate to take a reaction with nitric acid, putting the reactant in a solution, respectively carrying out EDTA (Ethylene Diamine Tetraacetic Acid) developing titration on the solution dissolved with the magnesium metal or magnesium oxide, so as to obtain the content of the magnesium metal and the magnesium oxide. The chemical phase analysis method disclosed by the invention is quick, accurate, efficient, and simple in operation, and has better practicability.

Description

technical field [0001] The invention relates to the technical field of chemical phase analysis, in particular to a chemical phase analysis method for passivated magnesium. Background technique [0002] Chemical phase analysis is a relatively new branch of analytical chemistry. It mainly studies the material composition of mineral raw materials and smelting intermediate products, and has been widely used in mineral processing engineering and metallurgical processes. The content of active magnesium in the passivated magnesium desulfurizer determines its desulfurization efficiency in the pretreatment process of molten iron. It is of great significance to conduct chemical phase analysis on passivated magnesium and determine the content of magnesium and magnesium oxide. [0003] The difficulty in chemical phase analysis of passivated magnesium lies in the separation of metal magnesium and magnesium oxide. In the past, the traditional method in the laboratory was to use bromine-m...

Claims

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Application Information

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IPC IPC(8): G01N21/79G01N1/38
Inventor 谢芬李洁李杰张穗忠余卫华卢文琪杨艳张杰严露
Owner 武汉钢铁有限公司
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