Mining and mineral processing plants are based on alkali leaching-based grinded ore processing with an operating capacity of several metric tons per day. Alkali leaching takes place inside pressurized autoclaves at a controlled temperature and pressure. Heat reduction is a significant issue in mineral processing industries, and heat exchangers are incredibly useful for heat reduction. The heat exchanger is the main equipment for dissolution, chemical reaction, crystallization, distillation, fermentation, etc. Correct selection of heat exchangers is very important in process industries. Spiral heat exchangers are recognized as resourceful heat exchangers due to their compacted arrangement and elevated heat transfer effectiveness. An estimation study was done for the probable length of stainless steel pipe required for a double pipe heat exchanger in place of existing heat exchangers with a water jacket around stainless steel pipeline for economic benefits of organization and use of continuously generated heated water for other useful purposes at the mineral processing plant