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新型捕收剂DPY-4反浮选酒泉铁矿焙烧后的磁选精矿 被引量:3
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作者 朱一民 丛璐 +2 位作者 陈培宇 韩跃新 刘杰 《金属矿山》 CAS 北大核心 2024年第11期81-87,共7页
酒钢选矿厂铁矿石矿物组成复杂、矿石品位低、共伴生成分较多,其磁选精矿铁品位低、石英等脉石矿物含量高,属于难选铁矿石,酒钢选矿厂采用反浮选流程处理焙烧磁选精矿。新型常温反浮选捕收剂DPY-4可提高铁矿石的品位及回收率,为难选铁... 酒钢选矿厂铁矿石矿物组成复杂、矿石品位低、共伴生成分较多,其磁选精矿铁品位低、石英等脉石矿物含量高,属于难选铁矿石,酒钢选矿厂采用反浮选流程处理焙烧磁选精矿。新型常温反浮选捕收剂DPY-4可提高铁矿石的品位及回收率,为难选铁矿石的高效反浮选药剂。为研究该捕收剂对该矿石分选的有效性,进行了系统的选矿试验和机理分析。对石英和磁铁矿进行纯矿物浮选条件试验,在DPY-4浮选体系下,当pH=5、温度25℃、DPY-4用量为20 mg/L、抑制剂玉米淀粉用量40 mg/L时,石英和磁铁矿的回收率分别为92.51%和4.46%。针对酒钢选矿厂悬浮磁化焙烧后的三段磁选精矿进行反浮选试验,在矿浆温度25℃、DPY-4用量300 g/t、玉米淀粉用量600 g/t、pH=9.5时,获得的开路浮选精矿铁品位60.48%、铁回收率69.24%,闭路浮选精矿铁品位58.35%、铁回收率94.05%、SiO_(2)含量为4.62%。DPY-4不仅捕收能力强,而且选择性优异,这主要是因为DPY-4在石英表面能发生强烈的吸附作用,包括物理吸附和氢键吸附,玉米淀粉在石英表面吸附较弱,而对磁铁矿的作用相反。 展开更多
关键词 焙烧矿 磁选精矿 反浮选捕收剂 dpy-4
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Cellular functions of MLL/SET-family histone H3 lysine 4 methyltransferase components
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作者 J. K. Bailey Dzwokai Ma 《Frontiers in Biology》 CAS CSCD 2016年第1期10-18,共9页
The MLL/SET family of histone H3 lysine 4 methyltransferases form enzyme complexes with core subunits ASH2L, WDR5, RbBP5, and DPY-30 (often abbreviated WRAD), and are responsible for global histone H3 iysine 4 methy... The MLL/SET family of histone H3 lysine 4 methyltransferases form enzyme complexes with core subunits ASH2L, WDR5, RbBP5, and DPY-30 (often abbreviated WRAD), and are responsible for global histone H3 iysine 4 methylation, a hallmark of actively transcribed chromatin in mammalian cells. Accordingly, the function of these proteins is required for a wide variety of processes including stem cell differentiation, cell growth and division, body segmentation, and hematopoiesis. While most work on MLL-WRAD has focused on the function this core complex in histone methylation, recent studies indicate that MLL-WRAD proteins interact with a variety of other proteins and IncRNAs and can localize to cellular organelles beyond the nucleus. In this review, we focus on the recently described activities and interacting partners of MLL-WRAD both inside and outside the nucleus. 展开更多
关键词 H3K4MT histone H3 lysine 4 methyltransferase WDR5 RbBP5 ASH2L dpy-30 SET MLL WRAD Oct4 MYC cell biology protein lysine methylation
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