Vortex finder length

Typical target diameter is 5 to 100 pm and is the diameter that 50% reports to the overflow and 50% reports to the underflow. Typically three times target diameter is the diameter below which all particles in disttibution are removed. The standard hydrocyclone has an inlet diameter of 0.28 D the overflow exit diameter = 0.34 D the vortex finder length is 0.4 D cylindrical body of height of 0.4 D, vertical length of cone = 5 D or cone angle about 10°. Underflow diameter adjustable to adjust the volume split between the overflow and underflow. 

Grade efficiency (efficiency of separation for particle size x) Reduced grade efficiency defined as G x) = [G(x) — Rf]/(1 — R ) Vortex finder length Constant... 

Individual hydroclones are molded plastic devices with a tangential port for entry of the slurry into the top of a cone-shaped separation chamber which has two outlets. One outlet is an overflow vortex finder port for discharging water and the low-density fraction from the top of the chamber. The other opening at the apex of the cone is a discharge port for the high-density fraction. The inside diameter is 10 mm at the top of the cone, and the cone length is usually 16 mm. 

The key design variables are defined as those that are associated with the hydrocyclone dimensions, including cyclone diameter, D, inlet diameter, D, outlet (apex) diameter, D, and vortex finder diameter, D. In addition, the total length of the cyclone, L, the length of the cylindrical section, /, and the cone angle, 6, are also important. They all affect the operating performance of the hydrocyclone. 

The position of the vortex end is difficult to model. The first and, by far, the best known relation for the natural vortex length i.e. the length from the lip of the vortex finder to the position of the end of the vortex) was proposed by Alexander (1949) ... 

---