Abstract: A thermogravimetric study of oxidation of sulfide ore powders subjected to slow quasi-steady heating from 20 to 1000 °C is performed. Experiments on rapid shock wave and explosive heating of air suspensions of ore powders are carried out for modeling conditions of ore extraction in mines. Propagation of incident and reflected shock waves in air suspensions of fine-grained sulfide ores with particle sizes of 1–5 µm and volume density of 40–920 g/m3 is experimentally studied. Data on the dynamics and structure of incident and reflected shock waves are obtained for various values of the bulk density of the mixture. The changes in the weight percentage of ores are determined for samples subjected to quasi-stationary heating from 20 to 1000 °C. Shock waves were used to study the dynamic explosiveness of air suspensions of fine-grained sulfide ores. The changes in the fractions of chemical elements and compounds in ore powders after passage of shock waves are determined by X-ray diffraction analysis. It is shown that the amount of pyrrhotite in air suspensions of ore particles subjected to shock loading decreases. The fraction of sulfur in the ore samples considered in the present study is smaller than 32%; these samples are not dangerous from the explosion viewpoint.

Cite: Pinaev A.V. , Pinaev P.A.
Shock waves in air suspensions of sulfide ores
Shock Waves. 2021. V.31. N1. P.63-74. DOI: 10.1007/s00193-021-00997-w WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	Sep 10, 2019
Accepted:	Feb 9, 2021
Published online:	Mar 15, 2021

Identifiers:

Web of science:	WOS:000629129500001
Scopus:	2-s2.0-85102770623
Elibrary:	46783370
OpenAlex:	W3136419011

Citing: Пока нет цитирований

Altmetrics: