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

 

Some of projects carried out by CIMM project team and CIMM subcontractor:

 

SN.	CUSTOMER	PROJECT NAME	CAPACITY	REMARK
1	Huaiyin Metallurgical Ind.corp.	EAF	90 Ton	Designed & Supplied by Danieli
2	Nanjing Iron&Steel Works	EAF	90 Ton	Ditto
3	Dongbei Special Steel Corp.	EAF	50 Ton	Ditto
4	Ansteel	EAF	150 Ton	Ditto
5	Hengsteel	UHP EAF	100 Ton	Ditto