Recently, the 1.2mtpa ferronickel plant of (Naiman) Jing'an Non-ferrous Metals of Inner Mongolia started operation. 

The plant is contracted (EPC) by Sinosteel MECC based on the RKEF process, with 18 fully-enclosed submerged arc furnaces, having capacity of 33000kVA, placed in 9 workshops. Sinosteel MECC made optimization with its own technical advantages and thus greatly improve the productivity and achieved energy saving. 

Cylinder hot air stove is  used in the project. Features effectiveness and low consumption, the hot air stove is fueled with rotary kiln flue gas, submerged arc furnace gas and pulverized coal, the mixture of which entered into rotary kiln at a properly controlled temperature, making the combustion in hot stove more complete and stable. 

The enclosed submerged arc furnace guarantees good sealing performance whilst the gas is purified by cooling, sedimentation and dedusting to clean gas with low temperature, dust and moisture and can be recycled for re-utilization in drying kiln, saving energy consumption by 25%-30%.