A Through Explanation of Dryer Machine

The dryer has been mainly used for drying materials with some humidity and granularity in the fields, such as ore dressing, building materials, metallurgy, chemical industry, etc. The rotary dryer is highly adaptable to materials.Divided into direct heat transfer rotary drum dryer and indirect heat transfer tube dryer, the dryer is also known as drum drying equipment or cylinder drying machine, mining equipment, the most common and widely drying equipment. Rotary dryer is used for drying material with humidity or granularity in the industries of mineral dressing, building material, metallurgy and chemical. It can be used for drying many kinds of materials such as limestone slag, coal powder, clay stone etc.


This dryer includes circular body, tossing flitch, transmission device, assisting device and sealing ring. The dryer of our factory adopts new type tossing flitch product which includes multi- functions such as assistance, present sharing and material throwing and may make the supplies distributing uniformly on the radial section of the dryer pole building prices. So your content layer become lean, even and universal and exposed to the hot current entirely therefore the heat energy is fully employed. The right operation parameter is selected by the dryer in our factory, the coal consumption and power consumption is 10-15% lower than general dryer, and the production hourly is 10-15% higher. It’s popular in the cement and beneficiation industries.

Working principles:

Dry wet material from the belt conveyor or bucket elevator to the hopper, then through the feed pipe into the feed end of the hopper feeder. The feeding pipe slope is greater than the natural inclination of the material, so that the material smoothly into the machine dryer. Dryer cylinder slightly to tilt with a horizontal rotating cylinder. Materials from the upper end in the heat carrier from low-end to enter into countercurrent contact with the material, but also the heat carrier and the material together and flow into the cylinder. As the drum material by gravity to run to one end than at the end. The wet material in the cylinder body to move forward, directly or indirectly to the heat of the heat carrier, the wet material to dry, and then sent by belt conveyor or screw conveyor at the discharge end.


Rotary drum dryer is mostly used for the drying of products like clay, slag and coal dust in building material industry or metallurgy sector, and using slag in metal beneficiation. In order to control the temperature of the dryer, a thermocouple that may show the temperature change of the dryers feeding and discharging ends is allotted on the feeding and discharging devices.

This offers support for the greater management of the working temperature (standard 350-380 centigrade) in the drum. Rotary drum dryer is used in the drying of graininess substance, and sticky substance content or high moisture material with the addition of materials. Its advantages: great manufacturing capacity, wide rang of application, small flow rate resistance, significant variation range in treatment and practical procedure. It is most found in the drying of sand, mineral powder, coal slurry, chicken manure and dairy manure.

In the walls of the cylinder body equipped with a copy board, its role is to copy the material up and planted, so that the contact surface of the material and airflow increases, in order to improve the drying rate and to promote the material forward. The heat carrier is generally divided into the hot air and flue gas. Heat carrier through the sand dryer later, it normally takes the cyclone dust carried by materials within the gas trapping. For further reduce exhaust gas dust content, should also be put through a bag filter or wet dust collector and then emissions.

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