Mulumbu suffered a knee injury before taking part in the African Nations Cup for DR Congo and on his return missed last Sunday's 1-0 home setback against Tottenham.
But he was back training with his team-mates on Thursday and optimistic he will be ready to face the Reds.
Mulumbu told Albion's official website: "I missed the QPR FA Cup game before the African Cup of Nations with what I thought was a small injury.
"But the intensity of the games in the African Cup of Nations meant I needed a rest when I came back.
"It was hard mentally and physically but I've had a good rest over the last week and I feel refreshed.
"Mentally it was hard not to get through the group and it was quite painful physically playing through the injury.
"But when you play for your country and fans you just get over it - and I did it.
"I have been training this week but today (Thursday) was my first day back training with all the team.
"I think I will be fit for Monday's game, my knee is getting better, and I felt really good today."