Sample preparation method by fusing medium-carbon ferrochrome and high-carbon ferrochrome

A high-carbon ferrochromium and medium-carbon ferrochromium technology, which is applied in the field of alloy melting sample preparation, can solve the problems of damaging platinum crucibles and affecting the continued use of platinum crucibles, preventing corrosion, eliminating absorption and enhancement effects, and accurately analyzing data. reliable results

Inactive Publication Date: 2012-04-25
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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Problems solved by technology

However, most of the chemical components in ferroalloy exist in the form of simple substances. Elementary elements are easy to form low-temperature eutectic with platinum at high temperature, which will cause corrosion and damage to platinum crucibles, which will affect the continued use of platinum crucibles. Therefore, fusion sample preparation technology has become a constraint. X -Bottleneck in the popularization and application of ray fluorescence spectrometry for the determination of ferroalloys

Method used

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  • Sample preparation method by fusing medium-carbon ferrochrome and high-carbon ferrochrome
  • Sample preparation method by fusing medium-carbon ferrochrome and high-carbon ferrochrome

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preparation example Construction

[0017] The melting sample preparation method comprises a. preparation of a flux crucible; b. preparation of an oxidizing agent and sample pre-oxidation treatment; c. preparation of a standard sample and a glass frit of the sample to be tested. Both high-carbon ferrochrome and medium-carbon ferrochrome alloys are difficult to dissolve in strong acids, but it is found through experiments that these two alloy samples are easily oxidized and decomposed by molten strong alkaline peroxides, and supplemented with appropriate oxidants can make the samples in the samples Elemental elements are fully oxidized. The flux used in the preparation of the flux crucible is anhydrous lithium tetraborate with a melting point of 917°C; the melting point of barium peroxide and potassium nitrate is 500°C and the boiling point is 800°C, and it decomposes and releases oxygen at the measured temperature, so the sample is pre-oxidized During the process, the flux crucible will not be melted and damaged...

Embodiment

[0020] Step a, preparation of flux crucible: Accurately weigh 6.0000g (±0.5mg) of analytically pure anhydrous lithium tetraborate dried in an electric blast drying oven at 105°C for 2h into a platinum crucible, and place the crucible containing lithium tetraborate Place it on the rotary support of an automatic electric heating melting furnace with a constant temperature of 1050°C, start the process of preparing a flux crucible for melting, the first standing time is 3 minutes, the furnace body swings and the rotating support spins for 10 minutes, and the final standing time is 2 minutes. After the melting is completed, take out the crucible and turn it slightly cold, and prepare the flux crucible according to the order of first hanging the crucible wall and then hanging the crucible bottom. Cool to room temperature and set aside.

[0021] Step b, preparation of oxidant and sample pre-oxidation treatment: the oxidant is prepared by mixing analytically pure barium peroxide and p...

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Abstract

The invention discloses a sample preparation method by fusing medium-carbon ferrochrome and high-carbon ferrochrome, which comprises the following steps of: (1) suspending wall: fusing lithium tetraborate in a platinum crucible, and rotating the platinum crucible, so that the fused lithium tetraborate is evenly suspended at the side wall and the bottom of the surface in the crucible, and a fusion agent crucible is formed; (2) previously oxidizing: mixing oxidizing agent with a standard sample or a sample to be tested of the medium-carbon ferrochrome or the high-carbon ferrochrome, and oxidizing in the fusion agent crucible which is cooled to be room temperature; (3) fusing: fusing the previously-oxidized standard sample or the sample to be tested; and (4) preparing a sample glass piece: cooling the fused standard sample or the sample to be tested to be room temperature, and forming the glass piece of the standard sample or the sample to be tested by the fused sample. Therefore, the influence of line spectrum peak shift or spectrum peak shape change and the like to an analysis result caused by the inconsistent absorption and enhancement effect, the mineral effect, the surface effect, the granularity and the analysis element chemical valence among ferrochrome alloy elements can be effectively eliminated.

Description

technical field [0001] The invention relates to a melting sample preparation method for alloys, in particular to a melting sample preparation method for medium-carbon ferrochrome and high-carbon ferrochrome suitable for X-ray fluorescence spectrometer analysis. Background technique [0002] High-carbon ferrochromium is mainly used as an alloying agent for ball steel, tool steel and high-speed steel with high carbon content to improve the hardenability of steel, increase the wear resistance and hardness of steel; it is used as an additive for cast iron to improve the resistance of cast iron It can improve abrasiveness and hardness, and make cast iron have good heat resistance; it is also an important raw material for smelting stainless steel by oxygen blowing method. Medium carbon ferrochrome is used to produce medium and low carbon structural steel, chromium steel, and alloy structural steel. Therefore, iron and steel enterprises need to carry out laboratory analysis on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44G01N23/223
Inventor 吝章国鲍希波卢女平石毓霞韩斌王红秋赵海英李志明柴兴春左丽峰张彬李琳李才红
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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