CAJ | 학술논문

研究红土镍矿的脱水机理及还原过程动力学.结果表明,红土镍矿在升温过程中主要进行自由水的脱除、针铁矿的分解、高岭石及蛇纹石的脱羟基反应和蛇纹石类矿物的第二段脱羟基反应;红土镍矿还原过程可分为3个阶段,第一阶段的控速环节是化学反应,预焙烧和未焙烧红土镍矿的活化能分别为90.21和63.12 kJ/mol;第二阶段和第三阶段控速环节是扩散,红土镍矿的活化能逐渐增大.
연구홍토얼광적탈수궤리급환원과정동역학.결과표명,홍토얼광재승온과정중주요진행자유수적탈제、침철광적분해、고령석급사문석적탈간기반응화사문석류광물적제이단탈간기반응;홍토얼광환원과정가분위3개계단,제일계단적공속배절시화학반응,예배소화미배소홍토얼광적활화능분별위90.21화63.12 kJ/mol;제이계단화제삼계단공속배절시확산,홍토얼광적활화능축점증대.
@@@@The dehydration mechanism and reduction process dynamics of laterite nickel ore were studied. The results indicate that the dehydration of free water, the decomposition of goethite and the dehydroxylation reaction of kaolinite and serpentine as well as the second period reaction of dehydroxylation for serpentine mineral all take place in the process of heating. The reduction of laterite nickel ore consists of three stages. Chemical reaction is the controlling unit in the first stage, the activation energies of the precalcined and unroasted laterite nickel ores are 90.21 and 63.12 kJ/mol, respectively. Diffusion is the dominant link in the following two stages, in which the activation energy of laterite nickel ore gradually increases.