CAJ | 학술논문

[目的]探索氯化钙对一氧化碳还原分解磷石膏的影响效果.[方法]以CO作为还原剂,通过TG/DTG对CO 还原分解磷石膏的反应过程的研究,探讨磷石膏中掺入5%CaCl_2外加剂对还原分解过程的影响.[结果]TG/DTG对CO 还原分解磷石膏的反应过程可分为2个阶段:第1阶段即磷石膏中结晶水合物的脱水阶段,第2阶段即CO与磷石膏中CaSO_4发生氧化还原反应的阶段.磷石膏失重率随着升温速率呈现先增大后减小的变化趋势,但是变化量不大,而当磷石膏中掺入5%CaCl_2外加剂时,随着升温速率的增大磷石膏的失重率将稳定在38%左右不变,同时,第2阶段的反应活化能将大大降低,磷石膏的失重率也会有所提高.[结论]在磷石膏中掺入5%CaCl_2外加剂能大大降低CO还原磷石膏的反应活化能,同时能提高磷石膏的失重率.
[목적]탐색록화개대일양화탄환원분해린석고적영향효과.[방법]이CO작위환원제,통과TG/DTG대CO 환원분해린석고적반응과정적연구,탐토린석고중참입5%CaCl_2외가제대환원분해과정적영향.[결과]TG/DTG대CO 환원분해린석고적반응과정가분위2개계단:제1계단즉린석고중결정수합물적탈수계단,제2계단즉CO여린석고중CaSO_4발생양화환원반응적계단.린석고실중솔수착승온속솔정현선증대후감소적변화추세,단시변화량불대,이당린석고중참입5%CaCl_2외가제시,수착승온속솔적증대린석고적실중솔장은정재38%좌우불변,동시,제2계단적반응활화능장대대강저,린석고적실중솔야회유소제고.[결론]재린석고중참입5%CaCl_2외가제능대대강저CO환원린석고적반응활화능,동시능제고린석고적실중솔.
[Objective] The study aimed to research the effect of calcium chloride on the reductive decomposition of phosphogypsum with carbon monoxide. [Method] With the CO as the reducing agent, the effect of adding 5%CaCl_2 admixture in the phosphogypsum on the reductive decomposition process was discussed through the reaction process research of TG/DTG on the reductive decomposition of phosphogypsum with CO. [Result] The reductive decomposition process of TG/DTG on the reductive decomposition of phosphogypsum with CO could be divided into two stages: the first one was dehydration of crystalline hydrate in the phosphogypsum and second one was the redox reaction between CO and CaSO_4 in the phosphogypsum. With the rising of the heating rate, the weight-loss ratio of phosphogypsum showed the change trend of first increasing and then decreasing, but the variable quantity was little. With the rising of the heating rate, the weight-loss ratio of phosphogypsum would remain unchanged at 38% when the 5%CaCl_2 admixture was added in the phosphogypsum. At the same time, the reaction activation energy of the second stage was decreased largely and the weight-loss ratio of the phosphogypsum was also increased. [Conclusion] Adding 5%CaCl_2 admixture in the phosphogypsum could largely decreased the reaction activation energy of reductive phosphogypsum with CO and it could increase the weight-loss ratio of the phosphogypsum.