"加料速度" can be translated into English as "feeding rate" or "material addition rate", depending on the specific context.
Feeding rate is commonly used in industrial and manufacturing processes to describe the speed at which materials are added to a system or machine.
Material addition rate provides a more explicit description, emphasizing that it's the rate at which materials are being added.
Both terms are accurate, and the choice between them may depend on the specific industry or context in which they are used.