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electric arc furnace


 within the recent years - for the different types of electric-arc-furnaces (eaf) enormous technological developments have been the reasons for major changes of process parameters whilst productivity and economic efficiency of eaf- mills rised over time.
cimm accompanies these process improvements actively. the refractory lining concepts are continuously improved in order to meet those challenges; added by innovative machines and gas purging systems. 
with these solutions for eaf- steel production cimm proves not only refractory cost optimization but remarkable technological added values too.

in eafs with a need of high-power input and therefore with a long-arc melting procedure, water cooling panels are a common standard in the upper furnace sections. lower side wall sections in state-of-the-art eafs are lined with magnesia-carbon bricks of highest quality. the combination of raw materials and a specific bonding system lead to the aimed highest thermal flexibility, combined with lowest porosity and optimized slag resistance.
an electric arc furnace used for steelmaking consists of a refractory-lined vessel, usually water-cooled in larger sizes, covered with a retractable roof, and through which one or more graphite electrodes enter the furnace. the furnace is primarily split into three sections:
the shell, which consists of the sidewalls and lower steel bowl; 
the hearth, which consists of the refractory that lines the lower bowl; 
the roof, which may be refractory-lined or water-cooled, and can be shaped as a section of a sphere, or as a frustum (conical section). the roof also supports the refractory delta in its centre, through which one or more graphite electrodes enter.
  150t eaf
100t uhp eaf
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