Angang Grants Final Acceptance for Tandem Cold Mill Revamping Project Done by Danieli

After revamping, productivity was improved from 1.65 to 1.75 Mtpy, coil thickness accuracy achieved 0.9% of set up thickness value, and also coil flatness achieved less than 10 I-units.

This project consisted in the installation of a completely new 6-high stand to replace the existing 4-high stand, which applied radial type roller bearing and Danieli designed WR positive/negative bending, IR positive/negative bending and shifting, to increase the final product’s thickness and shape accuracy. Also the new radial type roller bearing and BUR chocks were supplied for stands No. 0-3.
Thanks to the production flexibility guaranteed by the Danieli Group facilities, all the mechanical components were manufactured by Danieli Changshu workshop. The equipment was delivered on site in June 2015, in keeping with the time schedule agreed with Angang.
Site shut-down started on June 28th, 2015, and the first coil was successfully rolled on August 10th, 2015 (PAC signed on August, 11th). After a very short time commissioning, the machine reached normal production and at the end of October 2015, Angang had produced more than 200,000 ton coils in total with better surface quality and better thickness accuracy.
After revamping, productivity was improved from 1.65 to 1.75 Mtpy, coil thickness accuracy achieved 0.9% of set up thickness value, and also coil flatness achieved less than 10 I-units.

Thanks to the good quality of the equipment supplied by Danieli, the rolling mill production after revamping has met all expected targets (it produces high strength steel 590 DP), while contractual guarantee figures were reached after the performance tests.

Based on the successful results of such tests, the Final Acceptance Certificate was signed by Angang on November 4th, 2015.

source: Danieli