A sample preparation method based on hot wire method

Abstract

The invention belongs to the technical field of heating wire method detection and discloses a novel method for preparing a sample based on a heating wire method. The method comprises the following steps: performing mechanical grinding and homogenizing a test sample; putting the mechanically ground and homogenized test sample into a beaker, adding analytical pure alcohol, and stirring and mixing; putting the stirred and mixed test sample into a muffle furnace at 825 DEG C to perform calcination; putting the calcined test sample under the dry and normal-temperature environment, and cooling to room temperature; and grinding the cooled calcined test sample and passing through a 200-mesh sieve to prepare the heating wire method test sample. The sample is prepared by a two-step mechanical homogenization and calcination mode, so that the test sample achieves a good homogenizing effect, the repeatability is high, and the complex sample preparation steps in the traditional melting water quenching sample preparation process are further simplified; and by the method for preparing the sample based on the heating wire method, segregation caused by crystallization of a high-crystallization-property test sample in the traditional melting water quenching sample preparation process can be eliminated, component change caused by ion exchange in the traditional melting water quenching sample preparation process can be eliminated, and compared with the traditional melting water quenching sample preparation process, the sample preparation method is simpler and more convenient.

Description

technical field [0001] The invention belongs to a sample preparation method involved in the detection technology of a hot wire method, in particular to a sample preparation method based on a hot wire method. [0002] technical background [0003] SHTT (Single Hot Thermocouple Technique) is a high-temperature in-situ analyzer, which is used in metallurgical slag heating and melting state, continuous cooling process crystallization and fixed temperature heat preservation process crystallization, etc. It is especially widely used in the analysis of crystallization behavior of continuous casting mold slag . The traditional molten water quenching sample preparation method is to mechanically mix 50g samples and homogenize them in a high-temperature silicon-molybdenum furnace at 1400°C; Finally, the water-quenched slag was dried and ground, and passed through a 200-mesh sieve to obtain an experimental slag sample. [0004] When using the traditional molten water quenching sample p...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a hot wire method for sample preparation in order to solve the problem of uneven composition and composition change caused by the existing traditional molten water quenching method for sample preparation

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