Rotary drum dryer is widely used in ore dressing plant and industrial drying. In terms of quality control of tumble dryer, Henan Zhengzhou Mining Machinery Co., Ltd. made some summaries. Here we share with you the quality control of the dryer cylinder.

1. Perform chemical analysis and inspection on the material. According to the requirements of GB700-2006, the thickness is ≤20m, the material is Q235-A, and the thickness > 20mm,the material will be Q235-B;

2. In addition to checking the size, cut the coiled board, and perform ultrasonic inspection on the cutting edge of each board in the range of 60mm in accordance with Class II of GB / T 2970-2004.

3. Welding, the cylinder sections of the dryer are made by circumferential welding, and there are not more than two longitudinal welds along the entire circumference, and the cylinder welds should be full, and the welds at the lifting plate should be smoothed . The weld undercut depth should not be greater than 0.5mm, the continuous length should not be greater than 100mm, and the total length of each weld undercut should not exceed 10% of the length of the weld. Ultrasonic flaw detection and magnetic particle flaw detection are carried out on longitudinal and circumferential welds. Ultrasonic flaw detection is in accordance with GB / T 11345 II Class B (excluding inlet flange), and magnetic particle flaw detection is in accordance with JB / T 4730-2005 grade II, and in accordance with 25% / The 100% principle, that is, if the defect is found in the 25% test, it needs to be extended to 100% detection.

4. After assembling, dimensional inspection is mainly carried out according to the drawings.

ZK rotary drum dryer is widely used for coal drying,sludge drying,aggregate drying,and other mineral drying.Welcome enquiry us to get solution and quotation.