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Method for testing chemical constituents in coal or coke ash by X-ray fluorescence spectrum analysis method

A technology of fluorescence spectroscopy and chemical composition, which is applied in the direction of material analysis, material analysis, and measuring devices using wave/particle radiation. It can solve the problems of complex sample pretreatment, difficult operation, and large consumption of reagents, and achieve high accuracy. , short analysis time and fast analysis speed

Inactive Publication Date: 2011-07-27
TANGSHAN JIANLONG IND CO LTD
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Problems solved by technology

The traditional chemical analysis method can only analyze a single element, the sample pretreatment is complicated, there are many links, the operation is difficult, it takes a long time (one week for a single sample), consumes a lot of reagents, and has poor repeatability

Method used

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  • Method for testing chemical constituents in coal or coke ash by X-ray fluorescence spectrum analysis method
  • Method for testing chemical constituents in coal or coke ash by X-ray fluorescence spectrum analysis method
  • Method for testing chemical constituents in coal or coke ash by X-ray fluorescence spectrum analysis method

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Experimental program
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Embodiment approach

[0012] 1. Main equipment:

[0013] a), wavelength dispersive X-ray fluorescence spectrometer:

[0014] The detector is a scanning gas flow proportional counter and a scintillation counter;

[0015] Maximum power: 4kW;

[0016] b), sample preparation equipment:

[0017] High frequency melting furnace or infrared melting furnace.

[0018] 2. Chemical reagents:

[0019] a) Oxidant LiNO 3 : 220mg / ml;

[0020] b), release agent LiBr: 30mg / ml.

[0021] c), flux LiB 4 o 7 +LiBO 2 :67%+33%

[0022] Note: The above reagents are of analytical grade or above.

[0023] 3. Ashing of samples:

[0024] Weigh 1g of coal and coke samples with a particle size of less than 1mm in an ash dish (generally analyze the coal sample so that it does not exceed 0.15g per square centimeter), put the ash dish into a muffle furnace at 100°C, and leave it under natural ventilation and the furnace door. Under the condition of a gap of about 15mm, it takes 30min to slowly rise to 500°C, keep at th...

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Abstract

The invention relates to a method for testing chemical constituents in coal or coke ash by an X-ray fluorescence spectrum analysis method. The method comprises the following process steps: ashing coals or cokes; fluxing by using a mixed solvent of lithium metaborate and lithium tetraborate to obtain a glass sheet, and directly scanning by using an X-ray fluorescence spectrum analyzer; and testing the content of the chemical constitutes in the coal or coke ash. A sample is made by a glass flux sheet method, the method is easy to operate and high in analysis speed, and the constitutes such as Fe2O3, CaO, MgO, SiO2, Al2O3, TiO2, K2O, Na2O, P2O5, MnO and the like in the coal or coke ash can be analyzed at the same time. The method has the advantages that: the repetitiveness and the reproducibility are higher than those of the national standard method for testing the chemical constituents in the coal or coke ash; and the method has the characteristics of scientificity, advancement, applicability, popularization, short analysis time, high accuracy and repetitiveness, pollution absence and the like.

Description

technical field [0001] The invention relates to a method for measuring chemical components in coal and coke ash by using an X-ray fluorescence spectroscopic analysis method for steel, and belongs to the technical field of metallurgical chemical analysis tests. Background technique [0002] In iron and steel enterprises, coke is an indispensable charge in blast furnace ironmaking. It mainly plays the role of providing heat, reducing agent, and material column skeleton. The quality of coke directly affects the quality and output of blast furnace ironmaking; in the coking process, coal Almost all of the ash in the coal is transferred into the coke, and the high ash content of the coal will inevitably make the ash content of the coke high, because the main component of the coal ash is SiO 2 、Al 2 o 3 Such acidic oxides have a high melting point. In the ironmaking process, they can only be discharged from the blast furnace in the form of slag by adding fluxes such as limestone ...

Claims

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Application Information

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IPC IPC(8): G01N23/223
Inventor 崔宏利张向东王占祥王晓峰朱海丰周立娟牛长江张东升梁玉东王瑜
Owner TANGSHAN JIANLONG IND CO LTD
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