Ball Mill

A ball mill works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. . Two tiers fixed on both end of mill, which are rotate on four rollers. Rollers are fixed on support and oil immersed.  Mill rotates on four roller and two tiers. Girth gear is fixed on shell, which driven mating gear, gearbox and motor, which are fixed on heavy drive base. It is partially filled with balls.  Input material is fed in two primary grinding compartments. Large diameter balls for reduce particle size are lying inside first compartment. Material comes into second compartment for further grinding. Smaller size media are laying inside this compartment for fine grinding. Diaphragms may place to regulate material level and control retention time. Material is feed and discharged through hollow trunnion at opposite end. The grinding media is the balls, which may be made of steel (chrome steel), stainless steel, ceramic, or rubber. The inner surface of the cylindrical shell is usually lined with an abrasion-resistant material such as manganese steel or rubber. Less wear takes place in rubber lined mills.

VIRA Engineering’s Ball mill is widely used in the powder production lines, such as cement, Ceramics, silicate, refractory materials, chemical fertilizer, glass ceramics,  , Pencil, Paint , Marble, Coal, minerals, Ferro Alloys etc. According to the need of customers and material, ball mills have been designed in standard sizes. Motor HP and Production is totally depends on property of material and require fineness.

Batch Type Ball Mill

VIRA Engineering’s Batch type ball mill is mainly used for mixing of the material, grinding, the fineness of the product is uniform, saving power. Batch Type Ball Mill useful for wet or dry powder grinding as well as homogenously mix more than two materials. Additives can be added for homogenously mixed during batch. It is for grinding Dyes, Ceramics, Pigment, minerals etc.

Batch Type Ball mill is consist heavy duty fabricated shell with both side bosses provide for providing good strength. Main shaft is fixed on both side bosses of shell. Main shaft is supported on both sides bearing & housing. Entire rotary drum assembly is mounted on heavy-duty fabricated structure. Inside lining can be done by particular material as well as design based on requirement. Material charging manhole is also used for mill cleaning purpose. Counter balance weight is fixed at opposite side of manhole, which help mill to rotate in balance condition.

Batch type ball mill is working as batch type operation. Adequate size, shape and qty Grinding media is placed inside rotary drum from inlet port. Material can be fed from inlet connection provided in shell. All ports need to close before start rotating rotary drum. Fed material rotates with rotary drum. Grinding media rotate and dropped in side and reduce particle size. Mixing and grinding operation being done simultaneously when drum rotates. Mill is to be stop after completion of batch and remove material from outlet port.

Advantages

• After finished material is discharged, another raw material can be put in for grinding, can’t continuous feeding and discharge material.
• Different liners and grinding media can be used to meet different requirements.
• The fineness of grinding material depending on milling time
• It can be used for wet or dry grinding, finished slurry can pass 1000mesh screen.
• homogenously mixed during grinding
• Auto feed or discharge by screw or hopper.

Pulverizer

The impact pulverizer consists of an encased rotor carrying swing hammers, whizzer classifier for fineness regulation and pressure gradient creator mounted on a solid shaft. Raw material to be pulverized enters the crushing chamber through the hopper or the automatic rotary feeder. The impact of the hammers on the feed material against the liner plates reduces it into fine powder. The ground material is carried towards the whizzer classifier for classification and the oversize particles are rejected by the classifier and returned to the crushing chamber for further grinding. The classified material is then conveyed into the cyclone for collection and bagging. A dust collector is provided in the system for ensuring dust less operation and for no loss of ground powder.

The VIRA Engineering impact pulverizers are used for a wide range of application e.g. Agricultural, chemicals, carbon and graphite, coal, coke, coconut shell and wood saw dust, clay, dye stuff and pigments, detergents, ferro-alloys fertilizers, fillers, food products, herbs and spices, pesticides, minerals, plastics, pharmaceuticals, resins, etc.

Advantages

• High speed rotor assembly two-way reversible hammers / beater
• Easy access to impact pulverizers interior through dual access doors
• Available in different size and models
• Cold and silent running Dust free operations
• Robust construction
• Low specific power consumption
• Durable long life
• Guaranteed grinding efficiency, particle sizes are finer and more uniform than that obtained from machine using screen