CAJ | 학술논문

研究了流化床反应器黄铜矿氯化产物的选择性氧化行为,结果表明,要保证流化床持续稳定工作,必须调整温度、N_2流量、O_2浓度、给料速度和物料含硫量等因素.温度较高(390～410℃)时,物料不粘结,但氯化物挥发较多;较低温度(350～360℃)易出现的物料粘结问题可通过采用低残S物料、提高N_2流量和O_2浓度加以避免.物料颗粒含少量CuCl和FeCl_3,可产生低熔物,是氧化过程易粘结的原因.使氯化产物在氧化物料中尽快分散并迅速氧化形成Fe_2O_3外层,是克服粘结的关键.低硫物料可避免较多残余硫化物氧化或氯化放热造成的流化床过热、粘结.
연구료류화상반응기황동광록화산물적선택성양화행위,결과표명,요보증류화상지속은정공작,필수조정온도、N_2류량、O_2농도、급료속도화물료함류량등인소.온도교고(390～410℃)시,물료불점결,단록화물휘발교다;교저온도(350～360℃)역출현적물료점결문제가통과채용저잔S물료、제고N_2류량화O_2농도가이피면.물료과립함소량CuCl화FeCl_3,가산생저용물,시양화과정역점결적원인.사록화산물재양화물료중진쾌분산병신속양화형성Fe_2O_3외층,시극복점결적관건.저류물료가피면교다잔여류화물양화혹록화방열조성적류화상과열、점결.
The selective oxidation behavior of chlorides produced by chlorination of chalcopyrite concentrate was studied using a fluidized bed reactor. Balance among reaction temperature, flow rate of the carrier gas N_2, O_2 concentration, feed rate and percent sulfur in the chlorides has to be adjusted for satisfactory fluidization. Although the particles of raw materials do not frit at higher temperatures (390～410℃), more chlorides are vaporized. The fritting of particles readily occurring at a lower temperature (350～360℃) can be avoided by employing the raw materials with lower sulfur content, and raising N_2 flow rate and O_2 concentration. The reason for that the particles are ready at fritting in the process of oxidation is the formation of a low-melting-point eutectic mixture due to its containing of few CuCl and FeCl_3 in the raw materials. In order to overcome the fluidized bed fritting, it is critical to have the chlorinated products dispersed as soon as possible in the oxidizing particles and quickly oxidized to form an out layer of Fe_2O_3. Using the raw materials with lower sulfur content can avoid overheating and fritting of the fluidizing bed due to highly exothermic oxidation and chlorination reactions of more residual sulfides.