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帮卖盆地是一个不对称的山间向斜盆地,其基底为海西-燕山期(γ_4~3-γ_5~2)花岗岩体。盖层为新第三纪N_1的含煤碎屑岩。锗矿大部分产于N_1~2煤层中。含铀、锗煤主要为煤化程度低的褐煤,属于半暗-半亮、暗-亮煤及亮-暗煤。为了探讨煤中锗的存在形式,采用了六种分析方法(电子探针、重液分离、粒度分析、电浸析、化学提取和逐级提取法),又进行了腐殖酸络合锗的室内模拟实验。根据红外光谱的分析,发现1700cm~(-1)峰基本消失,1250cm~(-1)峰有所减弱,而1600cm~(-1)峰增大,1400cm~(-1)峰略有增强。无疑说明形成腐殖酸锗络合物。随后经差热分析和测定介质中的pH变化等更进一步证明腐殖酸锗络合物的存在。本文认为 含铀煤中锗的存在形式主要有:1.与有机质成紧密化学结合,常以腐殖酸锗络合物及锗有机化合物存在。2.呈吸附状态,部分有机质、粘土矿物及褐铁矿等吸附。3.极少部分呈类质同象形式存在。
Basalt basin is an asymmetric mountain syncline basin, whose basement is Hercynian-Yanshanian (γ_4 ~ 3-γ_5 ~ 2) granite. The caprock is coal-bearing clastic rocks of Neogene N_1. Most germanium ore is produced in N_1 ~ 2 coal seam. Containing uranium, germanium coal is mainly low degree of lignite coal, are semi-dark - semi-bright, dark - bright and light coal - dark coal. In order to investigate the existence of germanium in coal, six analytical methods (electron probe, heavy liquid separation, particle size analysis, electro-leaching, chemical extraction and stepwise extraction) were used. Indoor simulation experiment. According to the analysis of infrared spectrum, it was found that 1700cm ~ (-1) peak disappeared, 1250cm ~ (-1) peak decreased, while 1600cm ~ (-1) peak increased and 1400cm ~ (-1) peak increased slightly. No doubt that the formation of germanium humic acid complexes. Followed by differential thermal analysis and determination of pH change in the medium to further prove the existence of the germanium humic acid complex. In this paper, the existing forms of germanium in uranium-bearing coal are mainly as follows: 1. In close chemical combination with organic matter, germanium humic acid complexes and germanium organic compounds are often present. 2. Adsorbed state, some organic matter, clay minerals and limonite adsorption. 3. Few parts exist in the form of isomorphism.