January 31, 2013 witnessed the successful hot test run of revamped slag granulating rotary drum supplied by CISDI on EPC basis for BF#2 of Yili Steel Co.

The project is implemented with CISDI’s proprietary slag granulating rotary drum technology, which is the first installation of CISDI rotary drum in BF built by other suppliers.

The original slag granulation process for BF in Yili Steel was provided with blowing nozzle at the end of fused slag ditch to granulate the fused slag in the slag granulating ditch. The slag-water mixture from two blast furnaces were directed through slag granulating ditch into the common sedimentation basin where it is taken out by grab bucket of traveling crane. CISDI is invited by Yili Steel to provide tailored solution to its problem in poor working conditions and low working efficiency. 

After analysis of Yili’s requirements and investigation the blast furnace and granulated slag conditions, CISDI proposed to build a separate granulated slag ditch to ensure the rotary drum center level is much higher above the ground, and the rotary drum outlet water is directed through shallow-bottom drainage tank and ditch into the sedimentation tank. In this way, it is possible to accommodate the rotary drum in the limited space and have relatively shallow foundation for construction on site.

With the rotary drum for BF#2 put into operation, the labor intensity is significantly reduced while the working environment and working efficiency greatly improved, winning high praise from Yili Stee.