Today’s metal industries put a high priority on issues like worker safety, operational speed, and efficiency. To tackle above issue, a Rotary slag removal machine is designed to remove steel slag. The steel slag is produced as a by-product of the process when molten steel is separated from impurities in steel-making furnaces. The steel slag is an intricate mixture of oxides and silicates that cools solidifies. A majority of industry today use workers to manually remove slag from furnaces using ladles. The high temperatures in these furnaces are up to 1500 °C which can injure the worker performing of this operation, making this process highly hazardous. Additionally, more physical strength is required by the worker to complete this manual slag removal. This paper focuses on design and analysis of an automatic Rotary slag skimmer machine. The numerical analysis of Rotary slag skimmer machine is performed by using ANSYS software. The static structural analysis, modal analysis, and transient analysis of Rotary slag skimmer machine is done. It has been noted that the critical components’ stress development is within acceptable limits, and the design is safe. It is found that the use of an automated Rotary slag skimmer machine can cut the 10-min manual slag removal procedure time to 2 min. The time it takes to remove slag will be cut by 80% using an automatic Rotary slag skimmer, and the cost of operation will go down as well. Additionally, this can improve the effectiveness of the slag removal procedure and safeguard the safety of people around the furnace.