Along the industrial process devoted to the production of titanium dioxide pigments by using ilmenite as main raw material, small residues amounts are generated, remaining clearly enriched in natural radionuclides and chemical pollutants. Between them, we can remark the scales enriched in both radium isotopes and lead, which are formed in the internal walls of pipes and some equipment. These scales are radiological anomalies that demand its mineralogical, elemental and radiometric characterization as a basis for a detailed radiological and toxicological assessment from the occupational and public point of view.

In this work, several scales collected in a TiO₂ pigment production plant in South of Spain have been mineralogically characterized by XRD, while information about their elemental composition and morphology have been obtained by applying the XRF and SEM techniques. In addition, radiometric determinations have been performed by gamma-ray and alpha-particle spectrometry.

The performed study indicates that the radiological doses received due to the scales by the workers performing its conventional activities are clearly lower than 1 mSv/y. Special dosimetric and chemical controls could be needed for the workers in charge of the maintenance labours (which include the removal of the scales) if these workers belong to an external company devoted to perform maintenance operations in several NORM industries.

在致力于以钛铁矿为主要原料生产二氧化钛颜料的工业过程中，会产生少量残留物，仍然明显富含天然放射性核素和化学污染物。在它们之间，我们可以记下在管道和某些设备的内壁上形成的同时富含镭同位素和铅的水垢。这些尺度是放射性异常，需要对其矿物学，元素和辐射特征进行表征，以此作为从职业和公众角度进行详细放射学和毒理学评估的基础。

在这项工作中，通过XRD对西班牙南部TiO ₂颜料生产厂中收集到的几种氧化皮进行了矿物学表征，同时通过应用XRF和SEM技术获得了有关其元素组成和形态的信息。另外，已经通过γ射线和α粒子光谱法进行了辐射测定。

进行的研究表明，由于从事常规活动的工人的体重秤所收到的放射剂量明显低于1 mSv / y。如果负责维护工作的工人属于专门从事多个NORM行业维护工作的外部公司，则可能需要专门的剂量学和化学控制措施来负责维护工作（包括去除水垢）。