摘要
采用逐级化学提取方法,研究了广西合山超高有机硫煤中Hg,Ni,Zn,Mn,Cr,V等有害元素赋存状态.解结果表明:超高有机硫煤中与无机质结合的Ni,Cr,V,Zn,Hg,Mn均大于90%,而有机结合状态硫小于10%.酸在各种无机结合态中,硫化物结合态、铁锰氧化物结合态或铝硅酸盐结合态为主要赋存状态;如,Ni和Zn主要与硫化物和铝硅酸盐结合;Hg主要与硫化物结合;Cr和Mn主要与硫化物和铁锰氧化物结合;V主要与铝硅酸盐和铁锰氧化物结合;Fe主要与硫化物和铁锰氧化物结合.因此,从煤的洁净利用角度看,超高有机硫煤中的这些有害元素有可能通过洗选来脱除.特殊的局限碳酸盐台地成煤环境决定了合山超高有机硫煤中Fe,Ni,Cr,V,Zn,Hg,Mn的上述赋存特征.
The occurrence of hazardous elements such as Hg,Ni,Zn,Mn,Cr,and V in Heshan high organosulfur coal formed in sedimentary environment of restricted carbonate platform was studied using sequential chemical extract. More than 90% of Ni,Cr,V,Zn,Hg,and Mn in the studied coal samples exist in inorganic state,less than 10% of these elements are associated with organic phase. Among various occurrences of these elements,the dominant occurrence modes are sulfide state,iron-manganese oxide or silicate state. For examples,nickel and zinc in these coal samples is mainly associated with sulfide and aluminosilicate; mercury mainly occurs in sulfide; chromium and manganese are mainly in sulfide and iron-manganese oxides. Vanadium mainly combines with aluminosilicate and iron-manganese oxides. Iron mainly occurs in sulfide and iron-manganese oxides. Hence,from the point of view of clean coal technology,it is possible to remove Ni,Cr,V,Zn,Hg,and Mn in Heshan high organosulfur coal together with pyrite by coal preparation. Special coal-forming environment of restricted carbonate platform results in such occurrence modes as Fe,Ni,Cr,V,Zn,Hg,and Mn in the investigated Heshan's coal samples.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2005年第1期33-36,共4页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(40133010
40272128)
国家重点基础研究专项经费资助项目(G1999022212-01)
