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首页> 外文期刊>Solid Fuel Chemistry >Morphological Characteristics of Noble Metals in the Combustion Products of Coals from the Arkhara-Boguchan Deposit (Amur River Region)
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Morphological Characteristics of Noble Metals in the Combustion Products of Coals from the Arkhara-Boguchan Deposit (Amur River Region)

机译：阿尔卡拉 - 博古坎矿床煤矿燃烧产物的形态特征（Amur河区）

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摘要

The chemical and physicochemical characteristics of brown coals from the Arkhara-Boguchan deposit were studied. These coals have increased ash content (to 18.7%) and high aluminum and silicon contents (to 30.5 and to 69.5%, respectively) and the main petrographic components-vitrinite (42%) and semivitrinite (46%). Separate combustion products (slag, fly ash, and sludge) were obtained by burning a bulk sample of 270 kg in the Amur Experimental Technological Complex. In the course of this study, the noble metals Au, Ag, and Pt, which were represented by two morphological types, were detected in all of these fractions. The first type of massive lumpy individuals, often with a noticeable treatment in an aqueous medium, was characterized by a high gold content (80%), sizes from 2.0 x 1.6 to 115.0 x 160.0 mu m, and the presence of impurity elements. According to their characteristics (fineness, composition of impurity elements, etc.), they largely reflected the mineral specialization of ore materials in source areas. The second form of the release of noble metals was loose agglomerates consisting of Au and Ag grains with various concentrations in a temperature range of 600-800 degrees C. The ability to concentrate the grains of noble metals of various genetic natures allows one to consider this interval as the initial stage of gold preservation in fly ash from volatilization by a gas stream.
机译：研究了褐煤中褐煤的化学和物理化学特性。这些煤具有增加的灰分含量（至18.7％）和高铝和硅含量（分别为30.5和69.5％）和主要的岩体成分 - vitriinite（42％）和半导体（46％）。通过在Amur实验技术复合物中燃烧270kg的散装样品来获得单独的燃烧产物（炉渣，粉煤灰和污泥）。在该研究的过程中，在所有这些级分中检测到两种形态类型所示的贵金属Au，Ag和Pt。通常具有在水性介质中的显着处理的大量肿块个体的特征在于高金含量（> 80％），尺寸从2.0×1.6至115.0×160.0μmM，以及杂质元素的存在。根据它们的特征（细度，杂质元素的组成等），它们在很大程度上反映了源区域中的矿石材料的矿物专业化。贵金属释放的第二种形式是松散的附聚物，其由600-800℃的温度范围内的Au和Ag晶粒组成，浓缩各种遗传自然的贵金属颗粒的能力允许人们考虑这一点作为气流挥发的粉煤灰中金保存的初始阶段的间隔。

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