⏺️Other industries have electric line as their siding like /blog/post/4240510 and /blog/post/4239408
⏺️Lines which bring raw material and send finished product might get electrified as Toranagallu - Ranajitpura section is being electrified. You are thinking of only Ballari - Toranagallu main line. Think on other side of Toranagallu - Ranajitpura line. If Iron ore comes from Donimalai (loaded at Ranajitpura station) then where loco change must happen from electric to diesel? Then loco change can't happen in Toranagallu - Ranajitpura section
⏺️Even if JSW sidings will not get electrified soon,...
more... then loco change from electric to diesel at Toranagallu station will be handled by IR itself not JSW. IMO JSW locos (whatever type) will be restricted for usage within plant only not outside plant