Method capable of determining major element(s) in ferrochrome alloy by using X-ray fluorescence melting piece method

Abstract

The present invention discloses a method capable of determining major element(s) in a ferrochrome alloy by using an X-ray fluorescence melting piece method. The method comprises the following steps: (1) selecting multiple standard samples with the grain size up to 200 meshes; (2) weighing the standard samples, adding a compound oxidant and a viscosity reducer, and stirring well; (3) weighing and adding a flux in a platinum crucible, pouring the well mixed standard samples into the platinum crucible and covering the flux, and placing the platinum crucible in a muffle furnace to complete alloy sample pre-oxidation; (4) putting the pre-oxidized platinum crucible in a sample melting furnace to perform sample melting, before demoulding, adding a demoulding agent, rotating, shaking, then performing cooling demoulding, and making glass piece(s) used for analysis; (5) testing main element strength value in the standard samples by using a X-ray fluorescence spectrometer, and building the measured strength value and a standard value into a primary working curve; and (6) grinding the to-be-tested sample(s) of the block ferrochrome alloy to the same grain size as the standard samples, meltinginto the glass piece(s) according to steps (2) to (5), and analyzing the component value of the glass piece(s) by using the X-ray fluorescence spectrometer. The method can extend the life of the platinum crucible and ensure accuracy and precision of the result(s).

Description

technical field [0001] The invention relates to a method for measuring major elements in ferrochrome alloys by an X-fluorescence fusion chip method, belonging to the technical field of physical and chemical detection. Background technique [0002] In order to meet the industrial requirements for steel properties, it is necessary to add ferrochromium and other alloying elements for microalloying treatment in the steelmaking process to improve the crystal structure of steel and improve the mechanical and physical properties of materials. On the one hand, or to guide the operation of the steelmaking process, it is necessary to carry out laboratory analysis on the chemical composition of ferrochrome alloy. Using traditional wet chemical analysis and the current national standard method to determine the content of chromium, silicon, phosphorus, manganese and other related elements in ferrochrome alloy, the operation is complicated and cumbersome, the steps are long, time-consumin...

AI Technical Summary

Problems solved by technology

This technical scheme is aimed at ferrochromium alloy, and the reagent wrapped into balls is an oxidizing agent, and its formula is: 2 parts by weight of lithium tetraborate+1 part by weight of lithium carbonate+0.5 parts by weight of sodium nitrate, and the sample size is 0.1 parts by weight. Usually, each part by weight is 1 gram, and the patent solution has the following disadvantages: 1. During the burning process, due to the presence of lithium carbonate, the mixture of oxidant and ferrochrome powder will splash heavily in the graphite powder, and some alloy Graphite powder splashes into the graphite powder, and the amount of splashing is uncontrollable, resulting in material loss of the alloy sample and lower test results; The part of a sample splashed into graphite powder will pollute the current sample, so that the data obtained in the final test often cannot represent the sample; 3. The melting time is too long, and the residual amount of release agent is not enough to ensure the quality of release. Severe residual

[0005] At present, there are many reports on the analysis of ferroalloys by X-ray fluorescence pellet method, but because the pellet method is greatly affected by the sample size effect and matrix effect, the accuracy of the analysis data is poor; and the attempt to analyze ferroalloys by X-ray fluorescence pellet method is often due to inability Find a suitable oxidant but cannot completely oxidize the iron alloy sample, causing corrosion of the platinum crucible, or in order to protect the platinum crucible from corrosion, the oxidation effect of the oxidant can meet the requirements, but it is easy to cause splashing and loss of the alloy, resulting in unstable final test results, so The application of X-ray fluorescence fusion method in the test of ferroalloy is not widespread yet

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