CISDI successfully rebuilds TISCO’s ageing caster 3

CISDI has successfully rebuilt TISCO’s caster 3.

The 16-year-old combined square bloom and slab caster was not functioning correctly. Its secondary cooling control system had failed to apply the cooling model to control slab edge water flow. An unreliable regulating valve could not regulate water stably in the event of a low flow.

CISDI has replaced them with its unique secondary cooling dynamic control model.

Optimised design has also been implemented to solve a problem which was resulting in a serious blocking of the caster’s nozzles, and to improve the arrangement of the secondary cooling loops, instruments and spraying.

TISCO’s caster 3 rebuild is shining example of how CISDI’s secondary cooling dynamic control model can dramatically improve stainless steel casting, a sector which has been exclusively-dominated by suppliers outside of China.

After the rebuilds, on the first run, ferritic stainless steel 0Cr13R was cast successfully with a cross section dimension of 200mm x 1,235mm. A uniform distribution of surface temperature and a stable control of width were achieved. The first casting speed ranged from 0.9 to 1.05 metres a minute.

Analysis showed the slab’s central segregation had reached Mannesmann 1 level, and its equiaxed crystal ratio had surpassed 60 per cent.

Since the first cast, slab grades 0Cr13R, 2Cr13, 430, 409, 20Mn23AlV, 441, 443 and 308 have been achieved.

TISCO’s caster 3 ejects its first stainless steel slab for the first cast

The benefits of CISDI’s 3D secondary cooling dynamic control model

The model ensures optimal strand temperature and high quality slab.

It automatically matches steel grades with proper control strategy.

Secondary cooling water flow and compressed air flow can be real-time adjusted to strand temperature.

From any duty position, operators are able to read strand’s real-time temperature status and make optimisation decisions.

A screen shot of CISDI’s model performing hot strand tracking