Otimização de planos de manutenção preventiva com foco nas expertise das equipes de execução em uma planta de mineração

Abstract

In industrial environments marked by the constant search for efficiency and cost reduction, maintenance management plays a strategic role in guaranteeing the availability of assets and the operational sustainability of organizations. The reliability of equipment is related to the quality of its preventive maintenance plans. Inadequate plans can result in wasted resources, unplanned downtime and low productivity. From this perspective, the aim of this study was to improve preventive maintenance plans in a mining industry, bringing them into line with the reality of execution in the field and, consequently, increasing their efficiency. The work was conducted through a case study involving four maintenance teams, with an initial average of 72% efficiency. Using the Pareto Principle, the work focused on two teams with the highest levels of inefficiency, the Ore Treatment Unit (UTM) and the Briquetting and Sleeve Filters. Using quality management tools such as the Ishikawa Diagram, the GUT Prioritization Matrix, the 5 Whys technique and the 5W2H action plan, the main causes of inefficiency were identified and corrective actions proposed. Although some targets were not fully achieved, progress was made in the efficiency of the UTM and critical obstacles were identified in the Briquetting Plant and Mango Filters. The case study presented in this paper showed that simply adjusting the time allotted in the maintenance plan led to significant gains, both in hours of work saved and in cost savings. The results obtained reinforce the importance of periodically reviewing maintenance plans in order to reduce maintenance costs, guarantee asset reliability and increase competitiveness in the market.