INTRODUCTION

The rotary drum of sand rotary dryer is made with steel plates with thickness about 8mm, so it is very durable. In general, there is nothing wrong with the rotary drum. However, under the influence of exterior factors, the wall of rotary drum would have cracks inside. Even though the cracks are every small, they can still influence the drying efficiency of sand rotary dryer. How to recover the cracks is what we will discuss about. At first, we need to process the front end of rotary drum. The ending place should be welded with flange circles and supporting plates. The supporting plates should be evenly distributed for supporting the flange circles. By doing so, the strength of ending place is intensified.

The cracking problem, due to the poor strength in the ending place, can be thoroughly resolved. During the shut-down period of sand dryer machine, Mi brace should be equipped in the place, which is about 1,500mm away from the original end of rotary drum. Or else, deformation would occur in the new ending place of rotary drum. Then, the deformed front end should be cut and dismantled from the rotary sand dryer. In the ending place of remained drum, welding groove should be prepared without any burrs.

At last, the prepared drum should be lifted up and connected with the ending place of remained drum. As long as the radial and axial tolerance of rotary drum is in rated scope, welding process can start. The thickness of each welding layer should be no more than 5mm. The welding technical process can effectively control the deformation of rotary drum. Interested in our products? Click the website for more information: http://www.ft-dryer.com.