MJ Série

Concasseur à Mâchoires

CONCASSEURS À MÂCHOIRES ROBUSTES REVOLUTIONNAIRE AVEC UNE FIABILITÉ UNIQUE ET UNE PERFORMANCE INÉGALÉE
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  4. Concasseur à Mâchoires
Les concasseurs à mâchoires réduisent les grosses roches ou le minerai par le biais de la compression. La pression mécanique est réalisée à l'aide des deux mâchoires du concasseur ; l'une est fixe alors que l'autre effectue un mouvement excentrique. Il existe aussi des types primaires et secondaires. Cependant, les concasseurs à mâchoires sont l'un des concasseurs les plus privilégiés en raison de leur capacité d'écraser toutes sortes de matériaux, quelle que soit leur , ainsi que de leur faible coût d'exploitation et de leur facilité d'entretien.

APPLICATIONS
Les concasseurs à mâchoires sont approprié aux applications de concassage primaire et secondaire pour les carrières, l'exploitation minière, le recyclage et les minéraux industriels, les matières premières les plus dures, les applications de concassage stationnaires, souterraines et mobiles.

POURQUOI MEKA CONCASSEUR À MÂCHOIRES?

•   Haute Capacité
•   Réduction élevée
•   Faible usure des plaques mâchoires
•   Grande capacité d'alimentation

   L'Angle de pincement optimisé assure que le matériau avance doucement dans la chambre de broyage pour permettre une réduction élevée, une productivité et une exploitation optimale des plaques de mâchoire.


POINT FORTS
•   *Construction robuste
   Cadre solide dans toutes les côtés et une excellente durabilité contre les chocs.
•   *Bielle conçue dans une résistance maximale pour des conditions d'écrasement sévères
   Acier moulé et usiné avec précision.
•   *Resistance pour une longue durée de fonctionnement
   Axe excentrique en acier allié forgé de grand diamètre, poli pour une finition fine et sans de filets de vis ou de rayons pointus qui peuvent provoquer des concentrations de contraintes
•   *Le système de cale hydraulique intégré permet des réglages des mâchoires rapidement sans outil

What is a Jaw Crusher?

Jaw crushers comprise one fixed and one moving jaw. The material is crushed between the movable jaw and the fixed jaw through the application of compressive force produced by the elliptical motion of the movable jaw. The movable jaw, which is supported from the top by an eccentric shaft, is connected to the tension arm and an angled built-in support plate that absorbs the cyclic loads in the lat section.

Jaw crushers are used as the primary crushers in the first stage of a crushing process for the breaking of large-sized rocks, while jaw crushers with smaller mouth openings are used to break smaller ores into finer sizes.

Two basic jaw crushers types are produced, being single or double-supported, depending on the movement system of the jaw. Single headed jaw crushers are the most common type.

 

For what processes/applications are jaw crushers used?

Jaw crushers are used as the primary crushers in the first stage of the crushing process. Jaw crushers are preferred for when breaking large rocks is the priority rather than achieving high capacity.

Jaw crushers can be used as first-stage crushers in small- and medium-sized plants, as well as for secondary crushing when necessary.

The oscillation distance of the jaw generally varies between 20 and 40 mm, and the number of oscillations varies between 200 and 350 rpm. That said, the dimensions of the outlet are as important as the inlet of the jaw crusher. Crushers can be adjusted within certain limits.

In jaw crushers, the outlet opening and jaw movement are adjusted to suit the ore being crushed and the desired product size. Chunks of ore crushed between the jaws descend under the force of gravity.  The greater the number of oscillations of the jaw, the more fine product is produced. In high oscillating crushers, the jaws open and close more often and ore does not have the opportunity to get much distance downstream between the jaws with its own weight and the ore is faced with more crushing force along the jaw.

 

What materials can jaw crushers process?

Jaw crushers are used to break up hard rocks and moist ores of all kinds, but are not suitable for muddy applications.

In eccentric jaw crushers, the jaw facilitates the downward movement of the ore, though these kinds of crushers are not recommended for crushing ores with high abrasive properties, as in addition to the compression force, the shear force provided by the horizontal movement of the jaw is also effective.

In the jaw crushers in which compression force is applied, the internal stresses that occur in the rock to be broken during the crushing process are also observed in the crushed rock. For this reason, the crushed rock produced by the jaw crusher is unsuitable as an aggregate in concrete, especially in the construction sector. If the rocks produced by a jaw crusher are to be used in the construction sector, the internal stresses in the rocks should be released by breaking them up with impact or hammer crushers.

 

What criteria and advantages are important in the selection of a jaw crusher?

·        These can be used as a primary or secondary crushers, depending on the size.

·        The use of jaw crushers in underground applications is convenient and common, as they can be produced with few parts, and are easy to carry, assemble and maintain.

·        There are no capacity problems, as the desired capacity can be achieved by using more than one crusher side by side when necessary.

·        They are easy to maintain and affordable.

·        The replacement of worn jaws is not time-consuming.

 

Useful tips for the maintenance and operation of jaw crushers.

·        These crushers operate with a belt pulley system. As long as the electric motor is maintained on time and protected from dust, the probability of failure is very low. Worn belts should be replaced with new ones at the recommended frequencies before breaking.

·        The recommended maintenance of moving parts at the stated intervals and the periodic lubrication of moving parts will minimize the risk of failure of the crusher.

·        Although the crushers operate with a protection system, the entry of hard iron into the crusher mouth should be avoided.

·        The size of the material to be fed into the jaw crusher should not be larger than 80% to 85% of the crusher mouth opening. Feeders that feed material to the crusher should be suitable both for the material size and the width of the crusher feed opening.

·        Large capacity jaw crushers are driven by double electric motors. To ensure continuity in the back and forth movement of the crusher jaw and to keep the applied force size equal, the pulleys that provide the movement are made of large diameter, heavy, and a flywheel is attached to the opposite side of the pulley in single-pulley crushers.

·        Jaw crushers have a material production capacity of up to 1,000 t/h depending on the outlet, and the reduction ratio is generally accepted as 1:5.

·        The maximum product size is 300 mm, depending on the breaker closed part adjustment opening.

·        Grate or pallet feeding systems should be included in the initial investment costs of jaw crushers.

·        Since the vibration and load distribution are not uniform during the operation of the jaw crushers, the concrete foundations required for assembly must be robust.

CONCASSEUR À MÂCHOIRES / SPÉCIFICATION TECHNIQUES

MJ 60

MJ 65

MJ 70

MJ 90

MJ 110

MJ 130

MJ 110C

MJ 120C

MJ 150C

MJS 90

MJS 110

Ouverture d’Alimentation (mm) Ouverture d’Alimentation (inch) 610x380 24x15 650x500 25,6x19,6 700x400 27,6x15,7 900x650 35,4x25,6 1100x850 43,3x33,5 1300x1000 51,2x39,4 1070x770 42,1x30,3 1200x870 34x47 1400x1200 55x47 900x200 35,4x8 1100x350 43,3x13,8
CSS (Réglage Min - Max) (mm) CSS (Réglage Min - Max) (inch) 40-150 1,57-5,9 40-150 1,57-5,9 30-100 1,18-3,93 60-150 2,4-5,9 100-200 3,9-7,9 125-250 4,9-9,8 75-210 2,9-8,2 70-175 2,75-6,9 125-250 4,9-9,9 25-75 1-2,9 25-100 1-3,9
Capacité (mtph) Capacité (stph) 20-80 22-88 25-100 27-110 25-110 27-121 50-200 55-220 100-300 110-330 275-600 303-661 135-340 148-374 175-595 192-655 340-970 374-1069 10-80 11-88 40-200 44-220
Puissance (kW) Puissance (HP) 30 40 45 60 45 60 75 100 132 180 160 220 110 150 160 200 200 300 30 40 75 100
Poids (kg) Poids (lbs) 6000 13228 7000 15432 4200 9259 11400 25132 33000 72752 43000 94798 19560 43122 27990 61710 50950 112330 6000 13228 11000 24250
Pour un matériau pesant 1,6 t/m³ ou 100 lbs/ft³. Les valeurs de capacité sont données à titre indicatif, les performances du concasseur peuvent varier en fonction de la granulométrie de l'alimentation, de la teneur en eau de l'alimentation, de l'aptitude au broyage du matériau, de la vitesse de rotation du concasseur, de la puissance installée et de la conception du circuit de broyage.

Les poids indiqués ne comprennent pas le moteur d'entraînement, les pieds de support, la plate-forme de maintenance, les goulottes d'entrée et de sortie.
CONCASSEUR À MÂCHOIRES / GALÉRIE

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