Rotary drum dryer for a drying equipment, the use of a wide range of equipment in mining. Divided into direct heat rotary drum dryer and indirect heat transfer drum dryer. About drum dryer drum dryer is also known as drum or cylinder dryer drying equipment, mining equipment is the most common and widely used as a drying equipment. Suitable for dry magnetic metal and nonmetal mines, heavy, floating clay ore and coal industries and cement industries, such as slime. It is characterized by high productivity, easy operation. Classification drum dryer under way drying medium heat and wet material directly into the heat transfer between the rotary drum dryer (drying medium in direct contact with the wet material to transfer heat) and indirect heat transfer drum dryer ( dry heat required to pass from the cylinder wall to the wet material indirectly) two. Low indirect heat transfer drum dryer efficiency and structure of complex reasons, very few to choose from, this does not describe. Direct heat transfer drum dryer, drying medium and the material in the direction of flow, is divided into two kinds of downstream and upstream. The main part of the direct heat transfer drum dryer is a slightly inclined to the horizontal rotating cylinder. Cylinder by geared speed is generally 2 ~ 6r / min, the inclination of the cylindrical dryer equipment related to its length, usually between 1 ° ~ 5 °. Material from the higher section of the drum into three return dryer, contact with hot air, with the rotation of the cylinder, the flow of materials under the action of gravity and the lower end of the discharge is dried. Due to the drying machine is working under negative pressure, the feed and discharge end seals are used to prevent leakage. How to choose the drying medium direct heat transfer drum dryer drum dryer is usually the flue gas. Downstream direct heat transfer drum dryer, its combustion chamber and the wet material feed at the same end, the direction of movement of the hot gas stream and the material is consistent, the wet material movement from the feed end to the discharge end, the hot air also the feed end and outflow through the discharge end of the lead in the role of fan blower from wet and dry material is heated in this heated air flow process. Counterflow drum dryer direct heat, it is wet material from the feed end to the dryer, in the discharge end of the combustion chamber, the material and drying medium (hot air) as a movement in the opposite direction, the material in this process the heat and dry. Downstream due to the drying of the wet material into the dryer on medium and high temperature dry contact, the initial impetus dry large temperature increases later with material dryer, drying medium temperature decreases. It is suitable for the final moisture content (ie, the degree of drying) less demanding physically. Lower exhaust temperatures dry materials, easy to transport. However, dust is generated, the fine material away rice easily airflow dryer, a larger amount of dust. Counter-dried in a drying process, dry driving force uniform, suitable for dry materials require more stringent dry. Drying medium dust carried by the wet material filtration area is less dust content of the gas stream. The specific choice depends on how dry is finally dried material requirements may be. Sand dryer _ Yuxin Senda (certified) _ Qianjiang dryer provided by Henan new Senda Heavy Machinery Co., Ltd.. Henan new Senda Heavy Machinery Co., Ltd. (www.hnsdzg.com) is a leader in Zhengzhou, crushing grinding equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Yuxin Senda in leadership with the staff warmly welcome all inquiries negotiations to create Yuxin Senda a better future.