Preparation method of sample for chemical analysis of fire-resistant stemming material

Abstract

The invention relates to a preparation method of a sample for chemical analysis of a fire-resistant stemming material. According to the technical schemes, the method comprises the following steps of:putting solid particles w2 weighed for the first time into a weighing tray, randomly selecting 5-10 sampling points, and uniformly obtaining a fire-resistant stemming material sample w1 to be subjected to chemical analysis; putting the w1 in the weighing tray; putting solid particles w3 weighed for the second time into the weighing tray to obtain a sample preparation material in the weighing tray;transferring all the sample preparation material in the weighing tray into a material bowl of a vibration sample grinding machine for a laboratory, and grinding the material for 30-60 seconds to obtain a ground material; and taking down the material bowl, scraping up all the ground material adhered to the material bowl, and grinding the material for 50-60 seconds to obtain the sample for chemicalanalysis of the fire-resistant stemming material. The preparation method has the advantages of uniform mixing and simplicity; the prepared sample for chemical analysis of the fire-resistant stemmingmaterial can be used for determining volatile lost chemical components; and the accuracy of determination results of the method is high.

Description

technical field [0001] The invention belongs to the technical field of samples for chemical analysis of fire-resistant gun mud. In particular, it relates to a method for preparing samples for chemical analysis of fire-resistant gun mud. Background technique [0002] At present, asphalt, tar or resin are often used as binders for refractory gun mud, and carbon materials such as coke graphite and other refractory materials such as corundum, alumina, silicon carbide, magnesia, etc. are mixed to prepare mud-like materials (Hu Baolei, Zhou Yongmao .Development status and direction of blast furnace clay, Refractory and Lime, 2013, 38(5):14~17), so refractory clay contains solid particles, subdivided and fluid viscous substances, and these refractory clay Chemical analysis requires the preparation of analytical samples. [0003] Due to the large difference in the composition of refractory clay, the sampling volume for chemical analysis is relatively small, and the samples are pre...

AI Technical Summary

Problems solved by technology

According to the provisions of YB / T 4196-2018 for anhydrous blast furnace clay, when preparing samples for chemical analysis, the tar in the sample is volatilized and lost, and the composition and content of tar in the material cannot be measured. The total volatile content of fire-resistant clay is The accuracy of the measurement results is also reduced because it is inconsistent with the specified conditions

[0004] The problems existing in the prior art are that the refractory gun putty cannot be directly mixed, the uniform powder cannot be prepared, the deviation of the measurement results of direct random samples is extremely large, the chemical composition of the volatile loss cannot be determined, and the measurement results of the total volatile matter are accurate low degree