Munson Machinery develops rotary continuous mixer for bulk material in high volumes

22-02-2021

A new sanitary Model RCM-60X20-SS rotary continuous mixer from Munson Machinery blends primary bulk ingredients, minor ingredients, and liquid additions uniformly in one to two minutes residence time, at low cost per volume of material blended.

Unlike mixers that force agitators through stationary material, the rotary continuous mixer design employs a 6m long by 152cm diameter rotating cylinder with internal mixing flights that impart a gentle tumbling action, distributing particles with each degree of drum rotation with no shear or heat generation, eliminating or minimising degradation.

A 22kW gear-reduced motor rotates the mixing drum at slow speeds on external trunnion rollers, minimising energy consumption and eliminating the need for shaft seals.

The mixer’s stationary inlet and outlet allow hard connections to upstream and downstream process equipment, while an internal stainless steel spray line plumbed through the stationary discharge end permits liquid coating, de-dusting or perfuming of dry ingredients. Spraying of liquid additives onto a wide expanse of cascading material produced by the internal flights minimises the time required to achieve uniform distribution.

A weir at the discharge end of the drum creates a residence bed of material that gently mixes as it travels through the drum, ultimately overflowing their weir and discharging at rates determined by the residence volume of the rotating cylinder and the rate of material inflow. A reversing discharge weir is available to evacuate material at the end of production runs.

All-stainless construction, smooth interior surfaces, the lack of shaft seals and unobstructed interior access, allow rapid sanitising and inspection of all material contact surfaces.

Other models range in diameter from 41-183cm, and in length from 122-732cm.

Typical applications include bulk food such as cereals, powdered drink mixes, snack foods and pet foods, and bulk chemicals such as detergents, catalysts, polymers, pesticides and fertilisers.