Flash dryer is useful for drying the feed/wet cake at very high temperature of process air and specific particle size is not required, like

Pharmaceutical products

Precipitated silica

Aluminium hydroxide

Magnesium hydroxide

Chemical industries

          Spin flash dryer is useful for drying the wet cake at moderate temperature of process air and specific particle size is not required,

Pharmaceutical products

Bulk drugs like activated /precipitated calcium carbonate

Aluminium hydroxide, magnesium hydroxide

Metallic Stearates

Dyes & pigment industries and

Chemical industries.

          Spray dryer is useful for drying the dilute feed materials where specific particle size is required to be controlled, such as,

Infant food

Pharmaceutical products

Precipitated silica

Aluminium hydroxide,

Magnesium hydroxide, ceramic industries

Dies & pigment industries

Chemical industries.

          Rotary dryer is useful for drying the wet cake at low temperature of process air and specific particle size is not required, like

Pharmaceutical products

Bulk drugs like carbonates

Dyes & pigment industries and

Chemical industries.

          Tunnel dryer/cooler is useful for drying the delicate & perishable products like,

Menthol crystal

Flakes & needles of various food, pharmaceutical material

Processed food like wafers, Biscuits, candies, sugar, cereals & flours

Metallic Stearates

Individual quick frozen (IQF) Vegetables, fruits & Roots