Basic Physicochemical Characteristics of the Huadian Oil Shale Semi-Cokes
Basic Physicochemical Characteristics of the Huadian Oil Shale Semi-Cokes
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发表时间：
2010
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通讯作者：
Liu Hongpeng
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作者：
Liu Hongpeng
半焦是油页岩干馏的主要副产品。合理利用半焦是油页岩综合利用的基础。在自行建立的油页岩半焦实验台上，对桦甸三个矿田的油页岩进行了半焦取样。采用多种实验方法，对半焦的基本理化特性进行了详细的研究。用XRD测定了半焦的矿物组成。采用电感耦合等离子体原子发射光谱法（ICP-AES）分析了半焦样品中微量元素的富集特征。利用热重分析仪测定了半焦的燃烧特性。此外，还分别对半焦的密度、可磨性、灰分特性、比热容和导热系数等性能进行了研究。结果表明，桦甸半焦是一种低品位燃料，具有高灰分、低热值和中间结渣倾向。桦甸半焦中含有较多的方解石、石英和伊蒙混层。半焦中微量元素含量较高，具有富集As的特点。根据实验结果提出了相应的燃烧动力学模型。认为半焦燃烧反应在不同温度下发生不同的反应级数。
Semi-coke is major byproduct of oil shale retorting. Rationally using semi-coke is the basis of comprehensive utilization of oil shale. Semi-coke samples of oil shales in 3 Huadian ore fields were obtained from a retorting experimental table set up by the authors. The basic physicochemical characteristics of semi-cokes were investigated in detail by a variety of experimental methods. The mineral composition of semi-cokes was measured with XRD. Abundance and enriched characteristics of some trace elements in the semi-coke samples were analyzed by inductively coupled plasma atomic emission spectroscopy(ICP-AES). The combustion characteristics of semi-cokes were also measured using thermal gravitational analysis apparatus. In addition, properties of semi-cokes such as density, grindability, ash characteristics, specific heat capacity and thermal conductivity, etc were also investigated according to corresponding criteria respectively. It was shown that Huadian semi-cokes are a kind of low grade fuel with high ash, low calorific value and intermediate slagbonding trend. Huadian semi-cokes contain more calcite, quartz and illite-smectite mixed layer. Content of trace elements in the semi-cokes is relatively high and characterized by enriched As. Based on experimental results, related combustion kinetic models were proposed. It was considered that different reaction orders occur at different temperature during an combustion reaction of semi-cokes.