Analysis of Radionuclide Partitioning at Various Stages of Processing of Ilmenite Ore Using HPGe Gamma-Ray Spectrometry

IF 1 4区工程技术 Q4 INSTRUMENTS & INSTRUMENTATION MAPAN Pub Date : 2024-01-04 DOI:10.1007/s12647-023-00728-9

S. V. Bara, M. R. Dhumale, S. Chinnaesakki, S. K. Jha, M. S. Kulkarni

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Abstract

This paper discusses the natural radioactivity levels in ilmenite ore and its final product. Two economically viable ores of titanium are ilmenite (FeO.TiO₂) and rutile (TiO₂). High-purity germanium (HPGe) detector was used to analyse samples of raw ore, its purified fraction and the final product (synthetic rutile). Radioactivity levels due to ²³⁸U and ²³²Th and its daughter products were estimated. The concentration of ²³⁸U and ²³²Th in raw ore, purified ore and synthetic rutile was found to be 204 ± 4 and 1208 ± 5, 89.0 ± 4 and 597.0 ± 4, 119 ± 2.5 and 398.0 ± 3 Bq/kg, respectively. The dose rates due to gamma photons estimated in raw ore and synthetic rutile were 572 nSv/h and 277 nSv/h, respectively. The activity index estimated was 5.3 for raw ore and 2.3 for final product (synthetic rutile). The final product contained only 25% of the radioactivity compared to the ore showing significant reduction in radioactivity due to the processing of the ore.

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利用 HPGe 伽玛射线光谱仪分析钛铁矿各加工阶段的放射性核素分馏情况

摘要本文讨论了钛铁矿及其最终产品中的天然放射性水平。钛铁矿（FeO.TiO2）和金红石（TiO2）是两种经济上可行的钛矿石。使用高纯锗（HPGe）探测器对原矿、提纯部分和最终产品（合成金红石）样本进行分析。对 238U 和 232Th 及其子产品的放射性水平进行了估算。发现原矿、提纯矿和合成金红石中的 238U 和 232Th 浓度分别为 204 ± 4 和 1208 ± 5，89.0 ± 4 和 597.0 ± 4，119 ± 2.5 和 398.0 ± 3 Bq/kg。根据估算，原矿和合成金红石的伽马光子剂量率分别为 572 nSv/h 和 277 nSv/h。原矿和最终产品（合成金红石）的放射性活度指数分别为 5.3 和 2.3。与矿石相比，最终产品的放射性含量仅为矿石的 25%，这表明矿石加工过程大大降低了放射性。

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来源期刊

MAPAN 工程技术-物理：应用

CiteScore

2.30

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology. The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.