本文選題：煤礦 + 硫鐵化合物��； 參考：《應(yīng)用化工》2017年05期

【摘要】：硫鐵化合物氧化放熱是引發(fā)煤炭自燃的原因之一,運(yùn)用XRD、TG-DSC技術(shù)分析硫鐵化合物的熱分解過(guò)程和非等溫?zé)岱纸鈾C(jī)理。研究表明,硫鐵化合物分解包括3個(gè)階段:在179.1~287.75℃內(nèi)逐步進(jìn)行物相轉(zhuǎn)化,403.5~493.75℃內(nèi)開(kāi)始FeS_2的氧化熱解,611.65~792.25℃內(nèi)發(fā)生硫酸鹽(或亞硫酸鹽)逐步分解,熱解失重達(dá)到最大值。運(yùn)用Friedma法、Kissinger法、Starink法對(duì)非等溫動(dòng)力學(xué)數(shù)據(jù)進(jìn)行分析,3個(gè)階段的表觀(guān)活化能分別是96,174,230 k J/mol。各階段樣品穩(wěn)定性逐漸提高,為硫鐵化合物自燃的綜合判據(jù)提供依據(jù)。
[Abstract]:The oxidation exothermic of iron sulfide compounds is one of the causes of spontaneous combustion of coal. The thermal decomposition process and non-isothermal decomposition mechanism of iron sulfide compounds are analyzed by XRDX TG-DSC technique. The results show that the decomposition of iron sulfide compounds consists of three stages: the decomposition of sulfate (or sulfite) occurs step by step at the temperature of 179.1 鈩，

本文編號(hào)：1922183