化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2014年
10期
4110-4117
,共8页
姜涛%张乔祎%江玉蛟%薛向欣
薑濤%張喬祎%江玉蛟%薛嚮訢
강도%장교의%강옥교%설향흔
废物处理%硼泥%焙烧%活化%浸取%白炭黑%氧化镁
廢物處理%硼泥%焙燒%活化%浸取%白炭黑%氧化鎂
폐물처리%붕니%배소%활화%침취%백탄흑%양화미
waste treatment%boron mud%roasting%activation%leaching%silica%magnesium oxide
以硼化工行业固体废物--硼泥为原料，在TG-DSC热分析基础上，采用马弗炉和微波炉对其进行活化焙烧，再将焙烧产物进行碱浸和酸浸综合回收硅、镁有价组分。研究了两种焙烧方式对硼泥中SiO2和MgO浸出率的影响。采用化学分析、X射线衍射和扫描电镜对焙烧产物以及白炭黑和氧化镁制品的化学成分、物相组成和微观形貌进行表征分析。结果表明：两种焙烧方式均可提高硼泥活性，促进硼泥中硅、镁组分的浸取。其中，马弗炉最佳焙烧条件为600℃、30 min，此时硼泥中SiO2和MgO浸出率分别为97.65%和98.81%；微波炉最佳焙烧条件为500℃、10 min，此时SiO2和MgO浸出率分别为98.03%和98.83%。白炭黑制品中SiO2含量为92.20%，颗粒多呈近球状，粒径100～200 nm。氧化镁制品中MgO含量为93.05%，晶粒呈圆片状，粒径约2μm。
以硼化工行業固體廢物--硼泥為原料，在TG-DSC熱分析基礎上，採用馬弗爐和微波爐對其進行活化焙燒，再將焙燒產物進行堿浸和痠浸綜閤迴收硅、鎂有價組分。研究瞭兩種焙燒方式對硼泥中SiO2和MgO浸齣率的影響。採用化學分析、X射線衍射和掃描電鏡對焙燒產物以及白炭黑和氧化鎂製品的化學成分、物相組成和微觀形貌進行錶徵分析。結果錶明：兩種焙燒方式均可提高硼泥活性，促進硼泥中硅、鎂組分的浸取。其中，馬弗爐最佳焙燒條件為600℃、30 min，此時硼泥中SiO2和MgO浸齣率分彆為97.65%和98.81%；微波爐最佳焙燒條件為500℃、10 min，此時SiO2和MgO浸齣率分彆為98.03%和98.83%。白炭黑製品中SiO2含量為92.20%，顆粒多呈近毬狀，粒徑100～200 nm。氧化鎂製品中MgO含量為93.05%，晶粒呈圓片狀，粒徑約2μm。
이붕화공행업고체폐물--붕니위원료，재TG-DSC열분석기출상，채용마불로화미파로대기진행활화배소，재장배소산물진행감침화산침종합회수규、미유개조분。연구료량충배소방식대붕니중SiO2화MgO침출솔적영향。채용화학분석、X사선연사화소묘전경대배소산물이급백탄흑화양화미제품적화학성분、물상조성화미관형모진행표정분석。결과표명：량충배소방식균가제고붕니활성，촉진붕니중규、미조분적침취。기중，마불로최가배소조건위600℃、30 min，차시붕니중SiO2화MgO침출솔분별위97.65%화98.81%；미파로최가배소조건위500℃、10 min，차시SiO2화MgO침출솔분별위98.03%화98.83%。백탄흑제품중SiO2함량위92.20%，과립다정근구상，립경100～200 nm。양화미제품중MgO함량위93.05%，정립정원편상，립경약2μm。
Based on TG-DTA analysis, boron mud, the solid waste of boron chemical industry, was roasted in a muffle oven and a microwave furnace at different temperatures, and the roasted products were processed through alkaline leaching and acid leaching to extract separately valuable Si and Mg components. The effects of roasting methods and temperature on leaching rates of SiO2 and MgO were investigated. Chemical and phase compositions as well as micro-structures of the roasting products, obtained silica and magnesium oxide were analyzed and characterized by chemical analysis, XRD and SEM. The results indicate that the activity of the boron mud increases after both two types of roasting. The optimal process parameters are 600℃ and 30 min for the roasting in muffle oven and 500℃ and 10 min for doing in microwave furnace. At these conditions, the leaching rates of SiO2 and MgO reach 97.65% and 98.81% for former and 98.03% and 98.83% for later, respectively. The silica prepared, containing 92.20% SiO2, consists of nearly spherical grains with diameter ranges from 100 to 200 nm. And the magnesium oxide obtained, containing 93.05% MgO, makes of plate-like grains with diameter about 2μm.
