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Method for measuring carbon content in high-carbon ferrochrome by infrared absorption method

An infrared absorption, high-carbon ferrochrome technology, applied in the field of chemical analysis, can solve problems such as the lack of ideal flux ratio, achieve the effects of stabilizing carbon analysis results, reducing carbon release speed, and improving fluidity

Inactive Publication Date: 2019-10-01
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The choice of flux should not only make the sample melt completely, but also be conducive to the generation and release of carbon dioxide. It can be seen that there is no ideal flux ratio at present, which can meet the requirements of completely melting the sample during the detection process. , and is conducive to the generation and release of carbon dioxide, thus forming a detection method of carbon content in high-carbon ferrochrome with high accuracy and good repeatability

Method used

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  • Method for measuring carbon content in high-carbon ferrochrome by infrared absorption method
  • Method for measuring carbon content in high-carbon ferrochrome by infrared absorption method
  • Method for measuring carbon content in high-carbon ferrochrome by infrared absorption method

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Experimental program
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Effect test

Embodiment 1

[0040] Weigh YSBC37648-10 high-carbon ferrochrome standard samples of different masses with an electronic balance, accurate to 0.1mg, place them in a pre-weighed pure copper carbon-sulfur ceramic crucible of 0.300g±0.005g on the balance, mix well, and then cover Tin: tungsten = 1: 7 mixed flux 1.500g±0.005g, shake the crucible gently, then place the carbon-sulfur ceramic crucible on a high-frequency infrared carbon-sulfur meter to measure the carbon content, operate according to the instrument manual, parallel Determination of YSBC37648-10 high-carbon ferrochrome standard sample twice, the measurement results are shown in Table 1

[0041] Table 1

[0042] Sample weight / g Measurements% 0.0500 8.35 8.30 0.0800 8.42 8.41 0.1000 8.47 8.45 0.0120 8.40 8.44 0.0140 8.24 8.20 0.0150 8.30 8.26

[0043] Note: The analysis sample is YSBC37648-10 high-carbon ferrochromium C% is 8.49% The difference is 0.20

[0044] It can be inferred from T...

Embodiment 2

[0046] Weigh 0.2500g YSBC37648-10 high-carbon ferrochromium standard sample with an electronic balance, accurate to 0.1mg, place it in a crucible containing 0.300g±0.005g tin particles in advance, cover 1.500g±0.005g tungsten particles, the ratio of tin to tungsten is 1 : 5. Gently shake the crucible, then place the carbon-sulfur ceramic crucible on a high-frequency infrared carbon-sulfur meter to measure the carbon content, operate according to the instrument manual, and measure the YSBC37648-10 high-carbon ferrochrome standard sample 3 times in parallel. The measurement results are shown in Table 2.

[0047] Table 2

[0048]

[0049] Note: The analysis sample is YSBC37648-10 high-carbon ferrochromium C% is 8.49% The difference is 0.20.

[0050] It can be seen from Table 2 that: according to GB / T 4699.4-2008 "Determination of Carbon Content in Ferrochromium and Silicon-Chromium Alloys by Infrared Absorption Method and Gravimetric Method", the infrared absorption method i...

Embodiment 3

[0052] Weigh 0.1000g YSBC37648-10 high-carbon ferrochromium standard sample with an electronic balance, accurate to 0.1mg, place it in a pre-accurately weighed 0.300g±0.005g pure iron carbon-sulfur ceramic crucible on the balance, mix well, and then cover tin respectively : Tungsten = 1: 7, tin: tungsten = 1: 4 mixed flux 1.500g ± 0.005g, shake the crucible gently, and then place the carbon-sulfur ceramic crucible on a high-frequency infrared carbon-sulfur analyzer to measure the carbon content. Operate in accordance with the instrument manual, and measure YSBC37648-10 high-carbon ferrochrome standard sample in parallel for 3 times. See Table 3 for co-solvent addition methods and combustion conditions

[0053] table 3

[0054]

[0055] Note: The analysis sample is YSBC37648-10 high-carbon ferrochromium C% is 8.49% The difference is 0.20.

[0056] It can be seen from Table 3: According to the analysis in this way, the carbon content in high-carbon ferrochrome is measured ...

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Abstract

The invention relates to a method for measuring the carbon content in high-carbon ferrochrome by an infrared absorption method, and the method comprises the following steps of combusting a high-carbonferrochrome sample by using a high-frequency induction furnace to melt the sample, wherein a sample cosolvent is a mixture of pure copper, metal tin and metal tungsten. The method comprises the following steps of accurately weighing pure copper, paving the pure copper in a crucible, weighing a high-carbon ferrochrome sample, adding the high-carbon ferrochrome sample into the crucible, covering atin-tungsten mixture on the surfaces of the pure copper and the sample, shaking until the substances are uniformly distributed, placing the crucible on a carbon-sulfur instrument lifting platform, analyzing the sample in a carbon-sulfur instrument, heating and burning and melting the sample in an oxygen flow of the high-frequency induction furnace, carrying generated carbon dioxide to a measuringchamber of an infrared analyzer by the oxygen, absorbing infrared energy of a certain specific wavelength by the carbon dioxide, wherein the absorption energy is in direct proportion to the concentration of carbon, and measuring the carbon content according to the absorption energy detected by the detector. Pure copper, metal tin and metal tungsten are used as the cosolvent, so that the sample does not fly ash during sample combustion, carbon is fully released, the measurement accuracy is high, and the repeatability is good.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to an infrared absorption method for measuring the carbon content in high iron block samples. Background technique [0002] High-carbon ferrochromium, also known as big-eye chromium, is used as an alloying agent for high-carbon circulating pearl steel, tool steel and high-speed steel to improve the hardenability of steel, increase the wear resistance and hardness of steel; it is used as cast iron Additives to improve the wear resistance and hardness of cast iron, and at the same time make cast iron have good heat resistance; used for the production of silicon-chromium alloys and medium, low, micro-carbon ferrochrome and chromium-containing raw materials by the slag-free method; used for electrolytic production Chromium-containing raw material of metal chromium; used as raw material for smelting stainless steel by oxygen blowing method, and has been widely used ...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N1/44
CPCG01N21/3563G01N1/44G01N2021/3572
Inventor 钱平钱刚许晓红白云赵海峰
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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