On the matter of composition and technological properties of uranium ores of the Semizbai deposit (North Kazakhstan)

IF 0.8 Q4 METALLURGY & METALLURGICAL ENGINEERING
A. Baibatsha, E. Bashilova
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Abstract

Currently, uranium production occupies a decisive place in the world energy industry. In Kazakhstan, to meet the demand for uranium, hydrogenous deposits with technologically and economically favorable natural indicators are being developed, including the large Semizbai deposit. The deposit by genesis belongs to the hydrothermal-hydrogenous polygenic type in terrigenous sandy-clayey deposits. As a result of geological studies, the stratification of the ore-bearing deposits of the Semizbai suite was established: the lower and upper ore-bearing sub suites, the geometrization of the deposit was performed, and the morphology, number, and size of ore bodies were identified. Most of the balance reserves of the Semizbai deposit are concentrated in large and medium ore bodies. Analytical work and description of thin sections and polished sections under a microscope determined the material composition, textures, and structures of uranium ores, the main ore minerals, and their distribution in ores. When carrying out field and laboratory work, geological indicators of the deposit were obtained to select the technology for extracting ores. To select and justify the field development technology, special technological studies were carried out in the experimental area. Based on the geological indicators of uranium ores for the Semizbay deposit, well-in-situ leaching was chosen as the most rational for hydrogenous deposits. The characteristic of associated useful components of uranium ores is given, and the increased content of selenium, germanium, and scandium in them is established. The obtained research results can serve as a basis for improving the technology used for mining uranium ores and extracting associated components from them.
北哈萨克斯坦半米兹拜铀矿石组成及工艺性质研究
目前,铀生产在世界能源工业中占有举足轻重的地位。在哈萨克斯坦,为了满足对铀的需求,正在开发具有技术和经济上有利的自然指标的含氢矿床,包括大型的Semizbai矿床。从成因上看,该矿床属于陆源砂泥矿床中热液-含氢多成因型。通过地质研究,建立了半城套含矿矿床的分层:进行了下、上含矿亚套、矿床几何化,确定了矿体形态、数量和大小。半镇白矿床的平衡储量大部分集中在大中型矿体中。在显微镜下对薄片和抛光切片进行分析和描述,确定了铀矿石的物质组成、质地和结构、主要矿石矿物及其在矿石中的分布。通过现场和实验室工作,获得了该矿床的地质指标,选择了提矿工艺。为了选择和论证油田开发技术,在试验区进行了专门的技术研究。根据半米兹贝矿床铀矿石地质指标,选择井地浸出为含氢矿床最合理的浸出方式。给出了铀矿石伴生有用组分的特征,确定了其中硒、锗、钪含量的增加。所得研究结果可作为改进铀矿石开采及伴生成分提取技术的依据。
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