Help please

I apologize for the length of this message We need tips on how to help our daughter who is having extreme fits of rage that last 1-2 hrs if we donŒt give in. During these episodes her screams sound more like a growling animal than a child crying. She also does a strange motion like shes hitting herself in the face repeatedly Җ but not hard, its more like brushing her hand across her face vertically. She was abandoned at birth in Kazakhstan, we adopted her at 10 months old along w/ a boy 6 months older than her (having 2 kids has made this particularly stressful, her behavior scares her brother). The orphanage & caregivers were nice compared to other stories & pictures weҒve seen. We didnt see any signs of severe neglect there, though we realize we donҒt know the half of it. Weve worked hard for the 1-1/2 years weҒve been home w/ them to try & do everything right.Ӕ We have a consistent schedule, lots & lots of time spent reading & playing, & we give them loads of hugs, kisses, eye contact, touch & attention w/ a real consciousness to the idea of not playing favorites. We honestly give them 100% of our attention 80% of their waking hrs. We each take one child alone for a bit on the weekends. I stay home as much as possible w/ them, working just 3 days per week. The times I֒m working they are w/ their aunt in her home. Our daughter doesnt display many of the typical attachment disorder symptoms. She holds babies, loves animals, lets us snuggle her (in fact she demands this a lot more than our son, though it is usually on her terms & sometimes for unreasonable lengths of time). She says ғI love you unprovoked & really enjoys playing w/ other family members. The quickness & degree of anger, moodiness & stamina during outbursts is our major concerns. These are not your typical ԓterrible twos temper tantrums. Soԅ what can we do to try & help our daughter w/ her anger & unreasonable demands? Weve done time outs for a year when her hitting or screaming becomes unbearable. She used to sit in the same room w/ us, but lately we need to put her in her room for everyoneҒs sake. Now she throws things & hits walls & doors. When we wait it out, the behavior will last 1-2 hrs. This may be wrong, but we often wait it out. We dont want to have her controlling all of our lives & we keep thinking sheҒll realize that nice behavior will get her farther in life than fits of rage but it hasn֒t been working. Before we see a therapist, do you have any tips for what we do??? Thank you so much for your help, Dawn & Kurt