The article presents in detail the geochemical and mineralogical characteristics of magnetic particles formed during energetic combustion of hard coal and lignite. The aim of the research was to assess their suitability as a source of possible raw materials necessary for the development of new technologies. Both hard coal and lignite fly ash, as well as the magnetic fractions separated from them, have been tested using various analytical methods.

The chemical composition, phase composition, the size, and morphology of magnetically susceptible particles were determined. The main phases identified in the magnetic fraction are magnetite, hematite, and multicomponent phases, often trapped in aluminosilicate or calcium-aluminosilicate basic glass. In order to compare the chemical composition of the magnetic fractions and raw ashes, EF was calculated - the enrichment factor of the component in the magnetic fraction in relation to ash. Among the elements that have been enriched, apart from Fe, the following should be mentioned: Mg, Mn, Co, Nd, Cu, Ni, and Au. Only the concentrations of Cu and Ni in the magnetic fraction of lignite are much higher than the Clarke value (average concentration in ash), therefore the recovery of these raw materials can only be profitable from this ash. Research confirmed that when choosing the waste for the separation of metal concentrates, the content of the raw material in the ash is not always the most important, but also the form of its occurrence.

文章详细介绍了硬煤和褐煤的强力燃烧过程中形成的磁性颗粒的地球化学和矿物学特征。这项研究的目的是评估它们是否适合作为开发新技术所需的可能原材料的来源。硬煤和褐煤粉煤灰，以及从其中分离出的磁性馏分，均已使用各种分析方法进行了测试。

确定了磁敏颗粒的化学组成，相组成，大小和形态。磁性部分中鉴定出的主要相是磁铁矿，赤铁矿和多组分相，通常被困在铝硅酸盐或铝硅酸钙碱性玻璃中。为了比较磁性部分和生灰的化学成分，计算了EF-磁性部分中组分相对于灰分的富集系数。在已富集的元素中，除铁外，还应提及以下元素：Mg，Mn，Co，Nd，Cu，Ni和Au。仅褐煤的磁性部分中的铜和镍的浓度远高于克拉克值（灰分中的平均浓度），因此回收这些原料只能从这种灰分中获利。