CAJ | 학술논문

对印度尼西亚海砂矿氧化性球团氢气还原的规律做了较详细的研究。实验采用失重的方法,通过对反应过程的物相变化、热力学以及动力学方面的分析,探究了海砂球团矿氢气还原的机理。结果表明：温度在800℃和850℃,还原反应的最终产物主要是FeTiO3,整个反应限制环节是由两个不同阶段的过程组成,反应开始阶段由界面化学反应控制,之后由界面化学反应与内扩散共同控制；在900、950和1000℃三个温度下,反应产物中有钛氧化物出现,整个还原反应由三个不同的限制性环节组成,开始由界面化学反应控制,反应中间阶段是由界面化学反应和内扩散共同控制,反应后期则是由内扩散控制为主。
대인도니서아해사광양화성구단경기환원적규률주료교상세적연구。실험채용실중적방법,통과대반응과정적물상변화、열역학이급동역학방면적분석,탐구료해사구단광경기환원적궤리。결과표명：온도재800℃화850℃,환원반응적최종산물주요시FeTiO3,정개반응한제배절시유량개불동계단적과정조성,반응개시계단유계면화학반응공제,지후유계면화학반응여내확산공동공제；재900、950화1000℃삼개온도하,반응산물중유태양화물출현,정개환원반응유삼개불동적한제성배절조성,개시유계면화학반응공제,반응중간계단시유계면화학반응화내확산공동공제,반응후기칙시유내확산공제위주。
This article is focused on the reduction law of Indonesia ironsand oxidized pellets by hydrogen. Reduction experiment was performed with a thermogravimetric analyzer. The hydrogen reduction mechanism of the oxidized pellets was studied by the phase change, thermodynamic and kinetic analyses of the reaction process. It is found that the final products are FeTiO3 at 800℃ and 850℃, and the restrictive step of reduction is composed of two different stages, which are chemical reaction in the early stage of reduction and the mixed-control of chemical reaction and intraparticle diffusion in the subsequent reaction. Titanium oxide appears at 900, 950 and 1000℃, and the restrictive step of reduction is composed of three stages, which are chemical reaction, the mixed-control of chem-ical reaction and intraparticle diffusion, and intraparticle diffusion.