CISDI tech modernises Baosteel Desheng’s BF3

The CISDI-designed blast furnace 3 at Baosteel Desheng has been successfully revamped and blown in for tapping.

The furnace was first built in 2009 for producing low-nickel hot metal.

It was stopped for 84 days from mid October last year for a revamp and CISDI applied a host of innovative technologies to modernise it.

The blast furnace proper’s coolers, refractory and water system were rebuilt. The hearth’s castables were built as one block to replace ceramic cups, and the pebble stove was altered to a top-combustion checkered stove. This increased the hot blast temperature from 50 to 100 degrees Celsius.

The original sand-brick-filled casthouse was elevated to a flat casthouse, with the installation of an enclosed floor-type dust hood for tapholes and a water-cooled tuyere platform above tapholes.

The revamped casthouse area is now a much cleaner and brighter environment for people to work in.

The vibrating screen under the stockhouse has been transformed into an enclosed complex frequency screen, which minimises flying dusts.

The dedusting system has been thoroughly modernised by re-engineering stockhouse dust collection points and increasing the air volume.

Inside the casthouse and stockhouse, dust collectors now have folded filter drums in place of the original conventional bag-skeleton filters. The filter space remains unchanged, but the filtering areas have more than doubled and meeting emission standards is guaranteed.

BF3’s gas dry cleaning, hydraulic, automation, instrument and telecommunications facilities have been also modernised.

Fact file

Baosteel Desheng Stainless Steel, part of the Baowu Group, is one of China’s most dominant nickel alloy producers. Its skills are metallurgy, hot rolling, solid solution, cold rolling. It trades in nickel, nickel alloy and other alloys, hot and cold-rolled stainless steel coils and nickel-alloy coils.