The Effect of Sulphide Mixtures on Self-Heating
| Autor: | R.A. Payant, J.A. Finch |
|---|---|
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Canadian Metallurgical Quarterly. 49:429-434 |
| ISSN: | 1879-1395 0008-4433 |
| Popis: | Under certain conditions of air and moisture, sulphide materials can spontaneously heat or self-heat. The reaction mechanisms of self-heating are not well understood. Most previous work has involved pyrrhotite because it is the most reactive sulphide. The current work investigates the selfheating behaviour of sulphide mixtures composed of sulphides other than pyrrhotite. The four studied sulphides were pyrite, chalcopyrite, sphalerite and galena. The rest-potential was measured for each. Binary mixtures formed as a 1:1 weight ratio were pyrite-galena, chalcopyrite-galena, pyrite-chalcopyrite and chalcopyrite-sphalerite. The four sulphides and the binary mixtures were subjected to standard selfheating tests. The four individual sulphides did not self-heat. However, mixtures of pyrite-galena and chalcopyrite-galena with rest-potential difference (∆E) > 0.3 volts did self-heat while the mixtures of pyrite-chalcopyrite and chalcopyrite-sphalerite with rest-potential differences (∆E) ≤ 0.1 volts did n... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|