She won't raise them. Only a broody will raise chicks that have been grafted to her or that she hatched herself.
What I would do in your situation is to set up a brooder in the coop using a brooder plate, not a great lamp. Set it up so that she cannot touch the chicks and they cannot touch her but they can see and hear one another. You can use 1/2" hardware cloth to create such a structure. When the chicks are about 3 to 4 weeks old you can fashion a couple of chick sized doors in the brooder and then let them out into the coop with your lone hen locked out so that they can get familiar with the coop for about an hour and then let the hen back in and stay and monitor their interactions.
If she seems to leave them alone for the most part you can leave the check doors open. That way they can come and go as they need otherwise they can roost with her.
If you haven't done so already start feeding the hen chick starter and just put some oyster shell out on the side for her to eat as she requires for egg laying. You can leave the flock eating that for life or switch over to Flock Raiser or a good starter grower. Something that offers 18 to 20% protein is best.
