HAZEMAG Clay Crushing Plant for Vietnamese Cement Plant
- 06 August 2011
- Company & Industry News
HAZEMAG has supplied a complete clay crushing plant to the Bim Son Cement Co. for a new cement plant in Vietnam. The installation includes a double-rotor hammer crusher, designed for a throughput rate of 250 tph which is fed by an apron feeder.
To enable HAZEMAG engineers to determine the optimum crushing solution, extensive tests were carried out in the HAZEMAG test centre and it was determined that the best blend of raw material would be a mix of 50% weathered and 50% un-weathered clay. A HAZEMAG 1400 x 1200 HDS type hammer crusher, with installed power of 2 x 195kW was specified to achieve a product of 99% < 60mm with a maximum feed size of 650mm (one edge length).
The installation employs an apron feeder, fitted with infinitely variable speed control, which draws the clay feed material from a hopper, conveying it directly into the crusher. The HDS type crusher has two 1.4m diameter disc-type rotors coated with wear-resisting, welded hard-facings and fitted with rows of swing hammers which are suspended between the discs of the rotor, and able to swing freely through 360 degrees. Crushing takes place between the counter-rotating rotors and a centrally located anvil and the crushed clay then passes through openings in grate baskets located underneath the rotors. The distance between the hammers and the grate baskets can easily be adjusted, and the gap spacing of the grate bars determines final granular size of the product. The heavy duty vee-belt drive system, with a high mass moment of inertia, enables the crusher to handle even the largest rocks whilst maintaining peak capacity, and without affecting the rotor's performance.
Of particular significance is the 'easy-to-service' design of the crusher. Hammers are easily changed or turned using a hydraulic hammer bolt removal tool and a special lifting device. Large maintenance doors provide easy access to all crusher internals. The grate frames, complete with grate baskets, are mounted on assembly carriages which can be completely withdrawn from the crusher housing.