A kind of assay method of silicon content in ferromanganese

A method for measuring silicon content, which is applied in the field of analysis and testing, can solve problems such as difficult measurement, and achieve the effects of reliable method, good stability and convenient operation

Active Publication Date: 2016-03-02
YUNNAN TITANIUM IND
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  • Abstract
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Problems solved by technology

It is measured by inductively coupled plasma atomic emission spectrometry. Although the silicon element can be measured after the sample is dissolved, it saves time and effort, and does not need to consume a large amount of chemical reagents, which can reduce environmental pollution and protect the health of operators. Due to the difficulty of determination, there is currently no effective method for the determination of silicon content in ferromanganese

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  • A kind of assay method of silicon content in ferromanganese
  • A kind of assay method of silicon content in ferromanganese

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Experimental program
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Effect test

Embodiment １

[0015] Prepare each of the following standard solutions:

[0016] 1. Preparation of silicon standard solution:

[0017] 1A. Burn commercially available benchmark pure silica (above 99.9%) at 1000°C for 1 hour, cool and dry;

[0018] 1B. According to the amount of 10g mixed flux / g sample, add the above-mentioned dry silica to 4g mixed flux of anhydrous sodium carbonate and boric acid, heat and melt the sample at 950°C for 15min, and cool it into a frit, in which Mixed solvent is following mass ratio: the anhydrous sodium carbonate of 2 parts of quality: the boric acid of 1 part of quality, pulverizes and mixes;

[0019] 1C. Put the frit in step 1B into 100mL of water until completely dissolved, cool to room temperature, and dilute with water to obtain a silicon solution of 200 μg / mL to obtain a silicon standard solution, which is placed in a plastic bottle for later use;

[0020] 2. Preparation of silicon standard solution containing iron:

[0021] 2A. Weigh seven commercial...

Embodiment 2

[0028] Determination of silicon in ferromanganese sample to be tested:

[0029] 1. Preparation of ferromanganese sample solution to be tested:

[0030] 1A. According to the amount of 20g / g sample, add 2g of a mixture of anhydrous sodium carbonate and boric acid to 0.1000g of the ferromanganese sample to be tested, heat and melt the sample at 900°C for 15min to obtain 1.5g of molten sample, Wherein the mixture is the following mass ratio: anhydrous sodium carbonate: boric acid=2:1, ground and mixed;

[0031] 1B. Add 105mL of dilute hydrochloric acid to the 1.5g of molten sample in step 1A according to the amount of 70mL / g molten sample, and stir until the molten sample is completely dissolved to obtain 105mL of solution, wherein the volume ratio of diluted hydrochloric acid is as follows: HCl:H 2 O=1:3;

[0032] 1C. In the 105mL dissolving solution in step 1B, filter the dissolving solution with rapid quantitative filter paper, wash the funnel and the vessel with water for 5 ...

Embodiment 3

[0037] Determination of silicon in ferromanganese sample to be tested:

[0038] 1. Preparation of ferromanganese sample solution to be tested:

[0039] 1A. According to the amount of 30g / g sample, add 3g of a mixture of anhydrous sodium carbonate and boric acid to 0.1000g of the ferromanganese sample to be tested, heat and melt the sample at 950°C for 20min, and obtain 2g of molten sample, of which The mixture has the following mass ratio: anhydrous sodium carbonate: boric acid = 2:1, ground and mixed;

[0040] 1B. Add 150 mL of dilute hydrochloric acid to the 2 g of molten sample in step 1A according to the amount of 75 mL / g molten sample, and stir until the molten sample is completely dissolved to obtain 150 mL of solution, wherein the volume ratio of diluted hydrochloric acid is as follows: HCl:H 2 O=1:3;

[0041] 1C. In the 150mL dissolving solution in step 1B, filter the dissolving solution with rapid quantitative filter paper, wash the funnel and the vessel 8 times wit...

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Abstract

The invention discloses a method for measuring the content of silicon in ferromanganese. The method comprises the following steps of: adding a mixture of anhydrous sodium carbonate and boric acid into a sample; heating and fusing the sample at the temperature of 900 DEG C-950 DEG C; adding diluted hydrochloric acid to dissolve the sample; adding water to dilute the dissolved solution so as to obtain a sample solution to be measured. According to the method, after the sample is dissolved, the content of silicon in ferromanganese can be directly measured, the method is convenient to operate, the measured silicon content is high in accuracy, the measurement result is high in stability, reproducibility and accuracy, and the requirements of measuring the content of silicon in ferromanganese daily can be completely met.

Description

technical field [0001] The invention relates to a method for measuring silicon content in ferromanganese, belonging to the technical field of analysis and testing. technical background [0002] The national standard for the determination of silicon content in ferromanganese is to use the gravimetric method. Due to the cumbersome operation of the gravimetric method, the analysis and determination process is long. It is measured by inductively coupled plasma atomic emission spectrometry. Although the silicon element can be measured after the sample is dissolved, it saves time and effort, and does not need to consume a large amount of chemical reagents, which can reduce environmental pollution and protect the health of operators. Due to the difficulty of determination, there is currently no effective method for the determination of silicon content in ferromanganese. Contents of the invention [0003] The purpose of the invention is to provide a method capable of accurately m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73
Inventor 苏鹤洲陶俊李玉清曹占元陶虹
Owner YUNNAN TITANIUM IND
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