They have so many passing trains that they don't need any dedicated ones.
Surat- 24 trains, 7 daily; 3 Raj, 2 GR, 1 Duronto
Tata- 8 trains, 3 Daily, 1 Raj
Dhanbad- 23 trains, 5 Daily, 5 Raj, 2 Duronto
BGP-...
more... 9 trains, 2 daily, 0 Raj, 1 GR, 0 Duronto
If you are comparing 2 things, then do a worthy comparison. Don't just look at one side of the coin.