High capacity Wet Ball Miller

Jiangxi Napu Company is a manufacturer specializing in mining equipment and spares. Wear resistant rubber liners produced by Naipu Co, as one of the major materials for liners on grinders, gradually substitute the traditional steel liners, widely used in non-ferrous and ferrous metals mining, coal and power plants. Naipu Company, through long term R&D, designs and experiments, has successfully applied rubber liners in ball mills, SAG mills and AG mills, and significant tech breakthroughs and innovations have been achieved.

I. Features of rubber liners for grinders:

1. Rubber density is only 1/6 of metal one, and the lighter weight makes an easier installation and disassembly, saves time (to install rubber liners, it takes one-third of the time span for metal ones), greatly reduces workers’ labor intensity and improves the installation safety.

2. The damping, elasticity and absorbing functions of rubber liners reduce noise, and the noise from a rubber-lined grinder is normally lower by 8-10dB than that from one with metal liners.

3. As high wear-resistant rubber liners last much longer than metal ones, the cost-performance ratio of rubber liners is higher than that of metal ones.

II. Structural features of rubber liners:

1. Rubber liners for O/F type grinders

(1)As rubber friction resistance is higher than that of metal, rubber reverse spirals in the DE trunnion liner yield a high rate of returned materials to the mill.

(2)It can effectively improve the throughput of a grinding mill by changing height, spacing and pattern of lifter bars.

2. Structural Features of Grate Mills:

  Thanks to the improved evasive property resulting from flexible inserts between apertures of them, the rubber grates solve undesirable phenomena as of aperture blockage or jam experienced on metal liners, improving the screening efficiency.

3. Structural features of composite liners for SAG Mills:

(1) Rubber liners for SAG mills are classified into: normal rubber liners and composite rubber liners.

(2) Normal rubber liners use normal metal as skeleton inserts and abrasion resistant rubber as working surface, and are vulcanization molded in molds, mainly used as FE and DE head liners in small SAG mills.

(3) Composite liners use normal steel plate, abrasion resistant rubber plus imported abrasion resistant HDS steel plate in combination, and are high pressure vulcanization molded in molds. Alloy steel embedded on the working surface of composite liners has abrasion and impact resistant performance two times better than that of normal manganese steel. Abrasion resistant rubber effectively protects the shell from impact, lowers noise and reduces wear on shell wall.

(4) Composite liners are of simple structure, light in weight and easy for installation and maintenance.

(5) Compared with that of normal metal liners, the cost-performance ratio of composite liners is higher.

III. A Typical Case:                                                         

Results of rubber liners and metal liners applied on  Ø8.5x4m SAG mill at Tongling Dongguashan Mine are as follows: