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煤中铀的赋存分布及其在利用过程中的迁移特征

王文峰 王文龙 刘双双 白洪阳 王昱龙 段飘飘 秦可敏 陈义林

王文峰, 王文龙, 刘双双, 白洪阳, 王昱龙, 段飘飘, 秦可敏, 陈义林. 煤中铀的赋存分布及其在利用过程中的迁移特征[J]. 煤田地质与勘探, 2021, 49(1): 65-80. doi: 10.3969/j.issn.1001-1986.2021.01.007
引用本文: 王文峰, 王文龙, 刘双双, 白洪阳, 王昱龙, 段飘飘, 秦可敏, 陈义林. 煤中铀的赋存分布及其在利用过程中的迁移特征[J]. 煤田地质与勘探, 2021, 49(1): 65-80. doi: 10.3969/j.issn.1001-1986.2021.01.007
WANG Wenfeng, WANG Wenlong, LIU Shuangshuang, BAI Hongyang, WANG Yulong, DUAN Piaopiao, QIN Kemin, CHEN Yilin. Distribution and occurrence of uranium in coal and its migration behavior during the coal utilization[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(1): 65-80. doi: 10.3969/j.issn.1001-1986.2021.01.007
Citation: WANG Wenfeng, WANG Wenlong, LIU Shuangshuang, BAI Hongyang, WANG Yulong, DUAN Piaopiao, QIN Kemin, CHEN Yilin. Distribution and occurrence of uranium in coal and its migration behavior during the coal utilization[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(1): 65-80. doi: 10.3969/j.issn.1001-1986.2021.01.007

煤中铀的赋存分布及其在利用过程中的迁移特征

doi: 10.3969/j.issn.1001-1986.2021.01.007
基金项目: 

国家自然科学基金项目(U1903207,41972176);中国煤炭地质总局煤系矿产资源重点实验室开放基金项目(KFKT-2020-2)

详细信息
    第一作者:

    王文峰,1970年生,男,安徽庐江人,博士,教授,研究方向为煤地球化学.E-mail:wenfwang@vip.163.com

    通信作者:

    王文龙,1995年生,男,山西太原人,硕士研究生,研究方向为煤伴生矿产.E-mail:TS18010020A31@cumt.edu.cn

  • 中图分类号: P618.11;P619.14

Distribution and occurrence of uranium in coal and its migration behavior during the coal utilization

  • 摘要: 煤炭与铀两种资源在空间配置和成矿上有关联性,其合理开发利用及污染控制是我国国民经济和社会持续发展的重大需求。基于大量文献调研及前期研究成果,探讨了铀在煤中赋存分布及其在洗选、燃烧、淋滤过程中的迁移特征,取得一些认识:①煤中铀的富集成矿与成煤大地构造演化相关联,西南富铀煤主要与峨眉山玄武岩及断裂构造有关;西北富铀煤一般分布在拗陷和断拗陷盆地开阔地带一侧并与上覆砂岩型铀矿有关。②煤中铀主要与煤中有机质(主要是腐殖酸)结合,富铀煤中铀可以微细粒含铀矿物形式存在,并与有机硫、硫化物紧密共生,故在选煤过程中,无论重选还是浮选,其洗选脱除率均不高(最高为68.3%),部分煤浮选时铀甚至富集到精煤中;在煤燃烧过程中,铀或多或少都会以气相形式挥发到大气中。③富铀煤一般也同时富集V、Mo、Se、Re、Cr等高价态变价元素,这与有机体深埋分解造成的强还原环境有关,对于那些不变价元素如Sc、Y、La等的沉淀富集主要与腐殖酸形成的酸化条件有关;这些共生组合元素,在富铀煤的分选及煤矸石的淋滤过程中表现出一致的迁移行为。④电厂燃煤过程中铀主要富集(呈数量级的增加)到飞灰和底灰中,粉煤灰中铀淋出浓度一般随淋滤液pH的增加呈降低趋势,其萃取率随灰化温度的升高呈现降低趋势。研究结果为铀资源利用和环境污染控制提供参考和依据。

     

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出版历程
  • 收稿日期:  2020-12-28
  • 修回日期:  2021-01-28
  • 发布日期:  2021-02-25

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