The mill scale is a waste from the iron and steel industry. Due to the high content of iron in the form of oxides, it is an attractive material for the recovery of metallic iron by reduction. The product of mill scale reduction is an iron with a very extended surface and a high affinity for oxygen. The smaller iron particles are, the easier it is for spontaneous rapid oxidation, which can be linked to pyrophoricity. This article presents results of experiments using the TG/DTA thermal analysis method aimed at verifying the possibility of recovering iron from the mill scale by a reduction with carbon monoxide at 850 °C, 950 °C, and 1050 °C, taking into account the phenomenon of secondary oxidation in contact with oxygen from air at temperatures of 300 °C, 350 °C, and 400 °C. Two forms of mill scale were used for tests, in the original state and after grinding to develop the surface.

Waste management is a very important issue for the sustainable development of the modern world. The metallurgical industry is an industry that has been generating and still generates large amounts of waste that may have a negative impact on the natural environment and human health. Metallurgical waste comes from current production and is collected in landfills/heaps. Any research enabling the management of waste, including metallurgical waste, is justified. This study presents the results of research on waste that can be used in the production of aggregates – research related to natural radioactivity and the introduction of hazardous substances into water or soil. The study highlights the diversified chemical composition of metallurgical waste, which requires detailed research of the waste before it is directed to the production of aggregates. Aggregate, as a building material, is subject to specific legal (normative) regulations. Metallurgical waste that meets the requirements for the protection of the natural environment and human health should be used for the production of building materials - it is an environmentally friendly activity that implements the principles of sustainable development.

The aim of the research was to answer the question whether the remote work imposed on workers during the COVID-19 epidemic has an impact on their well-being, and if so, how. The research material consisted of the results of a survey conducted among the employees referred to remote work in connection with the announced state of the epidemic in Poland. The research was conducted in the period from July 31 to August 19, 2020. The research was conducted using a questionnaire method, the study was attended by 199 respondents. A survey questionnaire was used in the study and the results obtained were statistically processed. The research carried out allowed us to obtain the results of the self-assessment of employees referred to work in the homme-office in terms of their mental well-being and physical well-being.

The safety and health protection of employees in the workplace is one of the most important aspects of the European Union and should be perceived in the same way in Poland. Achieving an appropriate level of occupational health and safety as well as a safety culture in an enterprise requires specific outlays, including financial ones, from the employer. Entrepreneurs are only slightly aware of the magnitude of losses caused by inadequate working conditions. Few workplaces carry out analyses of the relationship between the level of occupational health and safety and the costs incurred, and not all costs related to accidents at work are analyzed – especially indirect costs.The article presents what activities and related costs improve the company’s occupational health and safety level, what events generate only losses, and how the level of occupational health and safety affects the amount of social security contributions for accidents at work and occupational diseases.

A research was conducted among the employees referred to work in the home office in connection with the announced state of the epidemic in Poland. The research was conducted using a questionnaire method, the study was attended by 199 respondents. The research is burdened with an error in the selection of statistical sample units, which resulted from the respondents’ involvement and their truthfulness. The aim of the article is to assess the activities of employers from the private and state sectors in Poland, related to the delegation of employees to work in the home office, and to analyze the skills and possibilities of self-organization of work by employees. An important result of the survey was to demonstrate the differences in the behavior of public and private sector employers. The study shows that the private sector has adapted better to sudden changes than the state sector.