Sample preparation method for detecting particle size of blast furnace slag particles

Abstract

The invention discloses a sample preparation method for detecting the particle size of blast furnace slag particles. The method comprises the following steps: putting a small amount of blast furnace slag powder sample into absolute ethyl alcohol, carrying out ultrasonic oscillation for 10-15 minutes, taking a small amount of suspension, dripping the suspension on an auxiliary metal sample adheredwith a conductive carbon adhesive, standing, and blowing an ear washing ball after the sample is solidified and dried, so as to obtain a sample for detection and analysis by putting a scanning electron microscope. According to the sample preparation method, powder samples are dispersed, agglomeration of the powder samples is reduced, the actual particle size of powder is reduced, and therefore particle size analysis errors are reduced, and meanwhile, electron microscope dust pollution is reduced.

Description

technical field [0001] The invention relates to the field of particle size analysis of blast furnace slag particles, in particular to a sample preparation method for detecting the particle size of blast furnace slag particles. Background technique [0002] Blast furnace slag is an inevitable product in the production process of the steel industry. With the continuous growth of my country's economy and the increase of steel production year by year, the accumulation of blast furnace slag is also increasing. As an additional product in the pig iron smelting process, blast furnace slag contains active minerals such as C3S and C2S. It has certain hydraulic gelling properties and can be used as concrete fine aggregate. The compressive strength of concrete depends on its hydration performance. There are many factors affecting the hydration performance of blast furnace slag concrete, such as the chemical composition of blast furnace slag itself, the particle size and particle size d...

AI Technical Summary

Problems solved by technology

The powder particles obtained by this method are relatively large, which deviates from the actual sample particle size, so the particle size analysis data has a large deviation, and the particles are agglomerated together, which is not conducive to observing the particle shape. Only the chemical composition data detected by energy spectrometer is reliable.

[0005] Patents CN 206248412U and CN 202793870 U both invented a scanning electron microscope powder sample preparation device. The purpose is to evenly scatter the grinding sample on the sample stage. The method is feasible, but the original particle size of the powder is not considered. Due to the effect of surface adsorption, the powder is agglomerated together, and the powder shaken off by mechanical action may not be the original size and shape of the particle; in addition, it will also pollute the scanning electron microscope, increasing equipment loss and maintenance costs

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