Solid-Liquid Mixers are the devices used to mix a solid with a liquid, and the process is called liquid-solid mixing. I know you are thinking, "I do that on a daily basis. Mixing sugar which is solid with water which is a liquid, I do that every day" Yes, that's true but, there is a tiny difference. This process is liquid-solid mixing process done in the industries. The mixing quantities are very high. Thus, mixers are used in this process to mix solid and liquid. This mixing process is of two types. In the first process which is called solid suspension, we suspend the solid which is immersed in the liquid through which the solid and the liquid mix. The suspension process is done to enhance the rate of weight transferred between the liquid and the solid. We always don't only mix two reactants; sometimes catalysts are also suspended and mixed to improve the flow of reactants and products. The second process is the process of liquid-solid mixing of agglomerate solids with liquids and is called solid deagglomeration. It is used because agglomerate solids are solids which accumulate in the walls of the mixers if mixed by solid suspension process. So, mixers are designed differently for these processes and are as a whole called as Solid-Liquid Mixers.