Solar thermal is the use of solar energy to produce thermal energy; i.e., heat. Industry in general uses a lot of heat for various processes. The food and beverage industry uses heat for many processes. Some mining processes use heat to extract the minerals from the ore. If your process plant has a boiler that produces heat, you can produce the same amount of heat with a solar heating plant.
These are some of the advantages of converting to solar thermal:
Lower energy costs
Lower CO2 emissions
Protection against variations in energy prices
Better supply assurance
Low maintenance costs