环境科技
環境科技
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ENVIRONMENTAL SCIENCE AND TECHNOLOGY
2014年
2期
23-26
,共4页
杨胜丹%宗贵仪%郗晓丹%梁赟
楊勝丹%宗貴儀%郗曉丹%樑赟
양성단%종귀의%치효단%량빈
煤矸石%白炭黑%焙烧活化
煤矸石%白炭黑%焙燒活化
매안석%백탄흑%배소활화
Coal gangue%White carbon black%Roasting activation
煤矸石是采煤和洗煤过程中排出的固体废物，会对环境造成危害，但是煤矸石中含有大量硅元素，其质量分数在45%以上，如果加以适当的处理和利用，仍是一种有用的资源。以煤矸石为硅源焙烧活化制备白炭黑，焙烧过程对煤矸石的活性影响较大，对焙烧过程中的粒度、配料比、温度和时间等影响因素进行讨论，实验结果表明：将煤矸石粉磨至180～250μm，煤矸石与复合碱按照m（煤矸石）：m（复合碱）=4∶1的比例混匀，700℃下焙烧120 min，经酸浸、碱溶、二次酸化后，再烘干、焙烧即得纯度在99%以上，SiO2的浸出率达88%以上。
煤矸石是採煤和洗煤過程中排齣的固體廢物，會對環境造成危害，但是煤矸石中含有大量硅元素，其質量分數在45%以上，如果加以適噹的處理和利用，仍是一種有用的資源。以煤矸石為硅源焙燒活化製備白炭黑，焙燒過程對煤矸石的活性影響較大，對焙燒過程中的粒度、配料比、溫度和時間等影響因素進行討論，實驗結果錶明：將煤矸石粉磨至180～250μm，煤矸石與複閤堿按照m（煤矸石）：m（複閤堿）=4∶1的比例混勻，700℃下焙燒120 min，經痠浸、堿溶、二次痠化後，再烘榦、焙燒即得純度在99%以上，SiO2的浸齣率達88%以上。
매안석시채매화세매과정중배출적고체폐물，회대배경조성위해，단시매안석중함유대량규원소，기질량분수재45%이상，여과가이괄당적처리화이용，잉시일충유용적자원。이매안석위규원배소활화제비백탄흑，배소과정대매안석적활성영향교대，대배소과정중적립도、배료비、온도화시간등영향인소진행토론，실험결과표명：장매안석분마지180～250μm，매안석여복합감안조m（매안석）：m（복합감）=4∶1적비례혼균，700℃하배소120 min，경산침、감용、이차산화후，재홍간、배소즉득순도재99%이상，SiO2적침출솔체88%이상。
The coal gangue is a kind of solid waste from coal mining and separating, which is harmful to the environment. It contains a large number of silicon and silica which account over 45% content. If managed and utilized properly, it will be still a useful resource. In this paper, the coal gangue collected from a coal mine was selected as raw materials for leaching silica. Calcination will greatly affect the activity of coal gangue. Effects of particle size of coal gangue, mix ratio of raw materials, calcination temperature, treatment time on activity of product were discussed. The results showed when coal gangue powder was grind to 180~250μm, the coal gangue and composite alkali were uniformly mixed (mcoal:malkali= 4 : 1) and roasted for 120 mins at 700 ℃, white carbon black was obtained by acid soaking, alkali treatment, secondary acidification, drying, high-temperature roasting, the productivity could reach 88%, and the purity was over 99%.
