Through the analysis of these methods of coarse slime separation,the "water-only cyclone+spiral separator" separation craft was improved as an efficient and economical way of separating coarse slime.

Water-only cyclone and spiral separator are commonly used equipment for treating coal fines at abroad.

Analysis of the separating result and mechanism of spiral separator show that better result can be get with spiral separator when dealing with difficult coal and coal slurry with high clay content,and the separation cost is low.

The influence of separating effect made by the structure parameter of the screw separating machine;

The structure parameters of the spiral concentrator processing coal ore were determined bythe tests in which the pitch.

Study and Commercial Test on Separation of Panzhihua Titanioferrite by Using GL-2Φ600mm Spiral;

Structural specialities of the GL-spirals are compounded by the cubicparabola, line, circle, parabola and designed with unequal spiral distances.

The industrial test and production application of D600mm Type GL\|2 spiral concentrator in Panzhihua titanium mineral processing plant for beneficiating the coarse grain particles (0\^4~0\^1mm) at the roughing stage are described.