Difference Between Rotary Kiln and Dryer

时间:2020-07-07 作者 :adminhk

When many customers inquire about the equipment, it is not only easy to mix up the pictures of the rotary kiln and the dryer, but also ask if they can replace the rotary kiln with a dryer belt when they buy the equipment. Because they see that there is little difference between the appearance of the rotary kiln and the dryer, and the overall cost of the dryer is cheaper, they want to use the dryer instead of the rotary kiln. This idea is understandable, but there are still differences and differences between rotary dryer and rotary kiln. Their functions and adaptive working environment are different. Here, a brief introduction to the difference between rotary kiln and dryer, what are the differences between rotary dryer and rotary kiln, so as to facilitate customers to distinguish the differences and avoid problems when purchasing.

Rotary kiln and dryer are both high-temperature drying and calcining equipment in the production of building materials, but there are essential differences between them. The structure of detail design is slightly different, the production process is not the same, and the use is also different. Let's analyze their differences in detail

1. Different shapes: from the shape, the diameter ratio and length ratio of rotary kiln are generally more than 10, while the dryer is generally less than 8. In other words, the rotary kiln is very slender, and the dryer is short and thick. This may not be clearly distinguished, but the length of rotary kiln is usually very long, which is used to calcine the product thoroughly and evenly.

2. Different processes: when the dryer is working, the materials are continuously thrown and scattered by the rotation of the cylinder and the spiral lifting plate, so that the materials can be fully heated and dried. The process is simple and the operation is convenient.

The main function of rotary kiln is to calcine materials, fully oxidize the materials, so as to achieve excellent chemical reaction and meet the requirements of production process. It is usually used after the classifier and magnetic separator in the mineral processing production line. The calcined materials can be divided into cement rotary kiln, lime rotary kiln, metallurgical chemical rotary kiln, etc. according to the material properties, it can be divided into two working modes: dry production and wet production.

3. Different uses: rotary kiln, also known as calcining kiln or rotary drum drying kiln, is mainly used to calcine raw materials requiring high temperature and change the properties of materials. Such as cement plant calcination cement clinker, metallurgical industry iron and steel ore magnetization roasting. Chromium, nickel, iron ore oxidation roasting, etc., in the field of industry and mining, all materials to be roasted need to be completed by rotary kiln. This is the main use of rotary kiln. For some materials requiring high temperature, rotary kiln is generally used.

Dryer is an important drying equipment in mineral processing production. It is specialized in drying materials. It is mainly used for drying ore raw materials. It is often used after ball mill and flotation machine in mineral processing, and can also be used for drying cement clinker, coal powder, slag and other raw materials.

4. Different structure: the cylinder body of rotary drum dryer is a horizontal rotary cylinder, and various types of sheet metal with different staggered arrangement angles are welded from front to back. Rotary kiln cylinder rotation is driven by the transmission device through the small gear fixed in the outer diameter of the cylinder gear and rotary. Different types of refractory bricks are inlaid in the body according to the demand. In order to prevent the material from being poured, the feeding end is provided with a door ring and a screw plate, and the outer part is equipped with a tyre for supporting. This may also be a more obvious difference between the two.

Through the above introduction, perhaps you have more understanding of the difference between rotary kiln and dryer, and what is the difference between rotary dryer and rotary kiln. When purchasing equipment, we should distinguish the function and working principle of the two, so as to choose the appropriate equipment.