矿物岩石地球化学通报
礦物巖石地毬化學通報
광물암석지구화학통보
BULLETIN OF MINERALOGY PETROLOGY AND GEOCHEMISTRY
2001年
2期
70-78
,共9页
冯新斌%洪业汤%洪冰%倪建宇%朱泳煊
馮新斌%洪業湯%洪冰%倪建宇%硃泳煊
풍신빈%홍업탕%홍빙%예건우%주영훤
煤%汞%连续化学浸取法%浮沉实验%赋存状态
煤%汞%連續化學浸取法%浮沉實驗%賦存狀態
매%홍%련속화학침취법%부침실험%부존상태
对采自贵州省二叠系龙潭组煤层的32个煤样进行了连续化学浸取实验研究,并利用重液分离方法,将另外8个采自同一地区的煤样按密度从1.4至2.8×103*!kg/m3分成10个密度段。通过测定化学浸取过程主要矿物组成的变化及汞的浸取量,对比研究各密度段分样中矿物组成和有机质含量与汞含量间关系,得出煤中汞主要赋存于黄铁矿中,煤样黄铁矿中汞的分布是不均匀的。研究表明,当煤炭被开采堆放到地表后,煤中大部分汞可以被酸性矿井水带入环境中,这一环境污染问题应予以重视。在洗煤过程中,平均51%的汞可以被脱除。因此,提高原煤入洗率可以有效地降低煤中汞的含量。
對採自貴州省二疊繫龍潭組煤層的32箇煤樣進行瞭連續化學浸取實驗研究,併利用重液分離方法,將另外8箇採自同一地區的煤樣按密度從1.4至2.8×103*!kg/m3分成10箇密度段。通過測定化學浸取過程主要礦物組成的變化及汞的浸取量,對比研究各密度段分樣中礦物組成和有機質含量與汞含量間關繫,得齣煤中汞主要賦存于黃鐵礦中,煤樣黃鐵礦中汞的分佈是不均勻的。研究錶明,噹煤炭被開採堆放到地錶後,煤中大部分汞可以被痠性礦井水帶入環境中,這一環境汙染問題應予以重視。在洗煤過程中,平均51%的汞可以被脫除。因此,提高原煤入洗率可以有效地降低煤中汞的含量。
대채자귀주성이첩계룡담조매층적32개매양진행료련속화학침취실험연구,병이용중액분리방법,장령외8개채자동일지구적매양안밀도종1.4지2.8×103*!kg/m3분성10개밀도단。통과측정화학침취과정주요광물조성적변화급홍적침취량,대비연구각밀도단분양중광물조성화유궤질함량여홍함량간관계,득출매중홍주요부존우황철광중,매양황철광중홍적분포시불균균적。연구표명,당매탄피개채퇴방도지표후,매중대부분홍가이피산성광정수대입배경중,저일배경오염문제응여이중시。재세매과정중,평균51%적홍가이피탈제。인차,제고원매입세솔가이유효지강저매중홍적함량。
The sequential extraction tests were carried out using 32 coals sampled from Longtan Group of Permian Period in Guizhou Province. Eight coal samples gathered from the same area were divided into 10 density fractions between <1.4 and >2.8×103*!kg*m-3by separation in heavy-liquid mixture. Combining the results of mineral transformation and that of the amount of mercury leached during the leaching experiments with the results of the correlation between mercury and each mineral phase, organic matter from float-sink experiments, the authors get the conclusion that mercury in coal mainly exist in sulfides. Studies also show that most of mercury in coal can be brought into the environment easily by acid mine drainage (AMD), and this kind of pollution should be paid more attention to. Mercury is not distributed in sulfides homogeneously in the same coal. During coal cleaning process, on the average, 51% of mercury in coal can be removed.