Method for measuring calcium oxide in medium manganese slag

A method of determination, the technology of calcium oxide, is applied in the direction of material analysis by observing the influence of chemical indicators, chemical analysis by titration, and analysis by making materials undergo chemical reactions, which can solve the problems of high cost and complexometric titration. , Crucible damage and other problems, to achieve the effect of reducing the cost of the experiment

Pending Publication Date: 2022-04-12
郝鹏 +2
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Problems solved by technology

Most of the existing ferroalloy analysis metal elements use acid-soluble (adding acid-soluble reagents such as nitric acid and hydrofluoric acid) analysis methods. Since the components in the medium manganese slag are mainly oxides, the sample cannot be dissolved, and subsequent complexometric titration cannot be performed. It is not suitable for practical application and operation. The existing alkali fusion method uses platinum crucible, which corrodes the crucible and causes damage to the crucible, so the cost is high

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  • Method for measuring calcium oxide in medium manganese slag
  • Method for measuring calcium oxide in medium manganese slag
  • Method for measuring calcium oxide in medium manganese slag

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Embodiment

[0027] A kind of assay method of calcium oxide in the manganese slag, comprises the following steps: Step 1: the alkali fusion of sample: the concrete operation of described step 1 is as follows: 0.2000g sample is placed in the crucible that fills sodium peroxide, Stir evenly, cover it in a high-temperature muffle furnace at 700-750°C, melt for 5 minutes, take it out to cool slightly, and rinse the bottom of the crucible with water. The crucible used in step 1 is made of metallic silver.

[0028] Step 2: acidify the sample after alkali fusion in step 1 into the solution to be tested: the specific operation of the step 2 is as follows: immerse the crucible with the melt in the step 1 in a 250mL beaker filled with 100mL water, add 25mL hydrochloric acid (ρ1.18g / mL), heated and boiled for a few minutes, removed the molten material and placed it in a beaker to obtain a test solution, took out the crucible, cooled to room temperature, and washed the crucible and cover with water; ...

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Abstract

The invention provides a method for determining calcium oxide in medium manganese slag, which belongs to the technical field of chemical substance component determination, and comprises the following steps: step 1, alkali fusion of a sample; step 2, acidifying the sample subjected to alkali fusion in the step 1 into a solution to be detected; 3, preparing a reagent for titration, and performing titration and determination on the solution to be detected; and 4, calculating the content of calcium oxide in the to-be-tested material. Through an alkali fusion test, the medium manganese slag can be molten through sodium peroxide and then acidified through hydrochloric acid, the medium manganese slag can be completely dissolved in water to form an aqueous solution containing calcium ions, the problem that a medium manganese slag sample cannot be dissolved is solved, the sample is molten through a silver crucible, and the experiment cost is reduced; the problems that a platinum crucible is adopted for testing in existing other product alkali fusion methods, the crucible is corroded to a certain degree in the alkali fusion methods, the crucible is leaked after being used for multiple times, replacement is needed, and the cost is high are solved.

Description

technical field [0001] The invention relates to the technical field of determination of chemical substance components, in particular to a method for determining calcium oxide in medium manganese slag. Background technique [0002] Medium manganese slag is mainly a by-product produced during the smelting of medium-carbon ferromanganese. It is used to adjust the alkalinity of the slag when smelting manganese-silicon alloys, which can reduce ore consumption and power consumption to a certain extent, thereby reducing smelting costs and improving economic benefits. , Therefore, there is a recycling value for reuse. Medium manganese slag mainly contains CaO, MgO, SiO2, MnO and other oxides, among which the content of calcium oxide is about 20%. Most of the existing ferroalloy analysis metal elements use acid-soluble (adding acid-soluble reagents such as nitric acid and hydrofluoric acid) analysis methods. Since the components in the medium manganese slag are mainly oxides, the sa...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/79
Inventor 郝鹏郑利赵斌
Owner 郝鹏
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