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Sinter crusher for primary and secondary crushing

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Sinter crusher for primary and secondary crushing

April 1, 2023 nflg 0 Comments

The fields of application of Sinter crusher

Specially-designed single roll crushers are used as sinter crushers for primary crushing in the iron and steel industry. Double roll crushers are particularly suited for secondary crushing. Furthermore they ensure a closely defined final grain size with only a small proportion of fine grain.

The feed materials of Sinter crusher

Lumps of hot and cold sinter or primary-crushed sinter in sintering plants.

The mode of operation: Sinter crusher

The sinter cake of various sizes that are dependent on the sinter belt’s width, is fed into the crusher via
a feeding table while it is either still hot or already cooled. It is then primary crushed by the crushing teeth on the grizzly bar. For secondary crushing the cooled sinter is fed into the double roll crusher via vibrating feeder . While feeding the material is spread over the roll’s width. The roll’s diameter, the tooth form and the circumferential speed are adjusted to the type and the size of the sinter in relation to the required final grain size. One of the two crushing rolls is designed as a loose roll in order to influence the final grain size by adjusting the gap width and to compensate wear and tear.

The special characteristics

The primary sinter crusher is fitted with a directlydriven crushing roll with strong crushing teeth, a movable grizzly bar carrier and a housing with an integral mobile frame to facilitate maintenance. The feeding table, the crushing tools and the bars are protected against wear by hard-facing. The crushing roll is arranged onto the machine’s base frame. The crusher shaft made of high-grade steel is arranged on amply dimensioned spherical roller bearings, with the bearing housings protected against dust and dirt by lubricated labyrinths. The crushing roll is electro-mechanically driven via electric motor, couplings and gears or it is electrohydraulically driven.

The double roll crusher’s individually-driven crushing rolls consist of roller bodies, equipped with crushing rings or crushing shells made out of highly wear-resistant special cast. The crushing rolls shafts are located in strong steel cast housings with lubricated, amply dimensioned spherical roller bearings with low maintenance requirements. The crushing rolls are driven by electric motors with coupling and gears via V-belt. The base frame is equipped with a positioning device to facilitate maintenance.

The advantages of Sinter crusher

– Consistently high capacity
– Low susceptibility to operational problems
– Long life time of parts
– Simple replacement of wear and spare parts
– Low proportion of fine grain
– Gentle crushing method

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