Method for measuring nitrogen in carbon series heating agent

A measurement method and technology of heating agent, which is applied in the field of nitrogen measurement in carbon-based heating agents, can solve problems such as inapplicable melting method, and achieve significant economic benefits, reliable data support, and simple operation

Inactive Publication Date: 2019-02-12
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are currently no corresponding national standards and product standards for the detection of nitrogen content in carbon-based heating agents, but the national standard GB / T30733-2014 describes the determination of nitrogen in coal (instrumental method), but this method is a combustion method and is not applicable Therefore, it is very necessary to invent a fast, simple and suitable method for measuring the nitrogen content in carbon-based heating agents to provide data support for production.

Method used

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  • Method for measuring nitrogen in carbon series heating agent
  • Method for measuring nitrogen in carbon series heating agent
  • Method for measuring nitrogen in carbon series heating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The mensuration of nitrogen content in the carbon series warming agent, its concrete steps are as follows:

[0022] a. Sample preparation: take a sample with a particle size not greater than 0.2mm, dry it at 105°C, put it in a desiccator, and wait for the test;

[0023] b. Blank experiment: choose a special graphite crucible and tin capsule for gas analysis to conduct a systematic blank experiment, repeat 5 to 7 times, record the three measurement results that are relatively stable and consistent, and calculate the average value and input it into the inert gas melting thermal conductivity detector as a blank value , The inert gas melting thermal conductivity detector automatically deducts the blank value when measuring the sample.

[0024] c. Calibration of the instrument: Weigh 0.01g GBW1113d and GBW1126d coal standard samples to establish the working curve of nitrogen, and choose GBW1113d as the drift correction standard sample to detect the accuracy of the method.

...

Embodiment 2

[0033] The determination of the nitrogen content in the carbon-based temperature raising agent, the specific steps are as follows:

[0034] a. Sample preparation: take a sample with a particle size of 0.2mm, dry the prepared sample in an oven at 105°C, put it in a desiccator to cool, and wait for testing;

[0035] b. Blank experiment: choose a special graphite crucible and tin capsule for gas analysis to conduct a systematic blank experiment, repeat it enough times, record the three measurement results that are relatively stable and consistent, calculate the average value and input it into the inert gas melting thermal conductivity detector as a blank value, and measure The inert gas melting thermal conductivity detector automatically deducts the blank value when the sample is taken.

[0036] c. Calibration of the instrument: Weigh 0.02g GBW1113d and GBW(E)110042GBW(E)110039 coal standard samples to establish the working curve of nitrogen, and choose GBW(E)110039 as the accura...

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Abstract

The invention discloses a method for measuring nitrogen in a carbon series heating agent, and belongs to the technical field of nitrogen element measuring methods. The method for measuring nitrogen inthe carbon series heating agent is used for measuring the content of a nitrogen element in the carbon series heating agent. According to the technical scheme, the method includes the steps of samplepreparation, blank experiment, instrument calibration and content determination. First, a sample to be tested is loaded into a tin capsule and compacted, then placed in a graphite crucible and meltedin a helium atmosphere, nitrogen is released in a nitrogen molecule mode, quantitative detection is performed by a thermal conductivity detector, and finally a computer directly displays in the form of percentage nitrogen content. The method for measuring nitrogen in the carbon series heating agent is the first to determine the content of the nitrogen element in the carbon series heating agent inthe industrial production, in the absence of corresponding standard, the determination of the nitrogen element in the carbon series heating agent by an inert gas fusion-thermal conductivity method isrealized, and the blank of the determination of the nitrogen element in the carbon series heating agent by the inert gas fusion-thermal conductivity method is filled. The method for measuring nitrogenin the carbon series heating agent has the remarkable advantages of being simple and fast, low in price, high in sensitivity, environmentally friendly and suitable for industrial analysis, and provides reliable data support for production.

Description

technical field [0001] The invention relates to a method for determining nitrogen in a carbon-based temperature raising agent, and belongs to the technical field of nitrogen element determination methods. Background technique [0002] Carbon-based heating agent is an auxiliary raw material for steelmaking. It mainly includes carbon briquettes, briquettes, coke, etc. These substances can release a lot of heat after burning. After steel scrap is added in the steelmaking process, in order to maintain the temperature of molten iron, it becomes necessary to add a carbon-based heating agent. With the continuous development of steelmaking technology, especially the smelting of variety steel, the requirements for impurity elements in molten steel are getting higher and higher. Nitrogen in steel can affect the welding performance of steel, electrical conductivity, electromagnetic rate, etc. The slab cracks, so effective measures must be taken to control the nitrogen content in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 张改梅王彬果商英赵靖鲍希波弓习峰
Owner HANDAN IRON & STEEL GROUP
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