CAJ | 학술논문

研究NaOH与纯碱添加量比例对氧化焙烧石煤中钒浸出率的影响。在最佳比例的浸出剂下，研究浸出温度、时间和液固比对钒浸出的影响以及浸出液循环利用实验。结果表明：在相对石煤质量12%NaOH 和4%纯碱的浸出剂下，钒浸出率达到88.67%，比单独使用12%的NaOH做浸出剂下钒的浸出率提高10%左右。在最佳质量分数的浸出剂下，最佳工艺条件为：浸出液NaOH浓度为1.0 mol/L，纯碱浓度为0.13 mol/L，浸出温度为95℃，时间为3 h，液固比为3：1。浸出液经固液分离后循环使用，第二次添加原有浸出剂用量的1/4，第三次添加原有浸出剂用量的1/2后，平均钒浸出率达83.40%，不仅降低了浸出剂用量，同时也提高了水资源的利用率。
연구NaOH여순감첨가량비례대양화배소석매중범침출솔적영향。재최가비례적침출제하，연구침출온도、시간화액고비대범침출적영향이급침출액순배이용실험。결과표명：재상대석매질량12%NaOH 화4%순감적침출제하，범침출솔체도88.67%，비단독사용12%적NaOH주침출제하범적침출솔제고10%좌우。재최가질량분수적침출제하，최가공예조건위：침출액NaOH농도위1.0 mol/L，순감농도위0.13 mol/L，침출온도위95℃，시간위3 h，액고비위3：1。침출액경고액분리후순배사용，제이차첨가원유침출제용량적1/4，제삼차첨가원유침출제용량적1/2후，평균범침출솔체83.40%，불부강저료침출제용량，동시야제고료수자원적이용솔。
The effect of the addition amount of NaOH and Na2CO3 on the leaching rate of vanadium from roasted stone coal was studied. With the optimal condition of leaching agent, the effects of leaching time, temperature and liquid to solid ratio on vanadium leaching rate and the leaching solution recycle experiment were studied. The results show that the leaching rate of vanadium is 88.67%under the condition of 12%NaOH and 4%Na2CO3 compared with the mass of stone coal, which is almost 10% higher than the leaching rate with NaOH 12% only in reaction system. The optimal technological conditions are that the NaOH concentration is 1.0 mol/L, the Na2CO3 concentration is 0.13 mol/L, the leaching temperature is 95℃, the leaching time is 3 h and the liquid to solid ratio is 3:1. The leaching agent was recycled to extract vanadium after solid-liquid separation. The average leaching rate is 83.40%when 1/4 of original leaching agent is added at the second time and 1/2 is added at the third time. The amount of the leaching agent is reduced and water efficiency is enhanced at the same time.