The application of the oil- bearing nelon liner with concave-convex pattern in disc pelletizer,not only the advantages of the material lining liner and the ceramic liner are all possessed,but their disadvantages were also overcame.

The testing modification of botton liner conducted on 6000 disc pelletizers in CHONGGANG was presented The pelletizing characteristics of various botton liner material was compared and through reasonably selecting of liner material ,the obvious benefit was obtained Five month′s operation shows that not only the disc working state was normal but also the pelletizing characteristic was improve

In the years 1998 and 1999, the oil-bearing nylon liner was used in the concentrate storage bins and as the bottom liner of disc pelletizers to replace original ceramic liner in XUANGANG pelletizing plant, so that the problem of sticking of material in concentrate storge bin in winter was solved and the quantity and quality of green pellet were increase

Loca equation and loca analysis for drawknife on disc balling machine;

Reconstruction of pan pelletizer and its effect;

Taking care of materials mix and 40% of adhesive materials in formula and a pan granulator in series, high analysis NPK is available by use of lowconcentration compound fertilizer plant, and drum granulation is unnecessary.

This paper mainly introduces the structure, running principle and how to determine geometrical parameters about main equipment in production line of compound fertilizer such as pan granulator, drier and drum sieve.