How are integrated Steel plants different from mini steel plants?

Mini steel plants are smaller, have electric furnaces, use steel scrap and sponge iron.  They produce mild and alloy steel of given specifications. An integrated steel plant is large, handles everything in one complex; from putting together raw material to steel making, rolling and shaping.

Explanation: I think

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.