The 7-footer stormed back toward Van Duyne and had to be held back by teammates after being called for a second technical.
Lopez got angry about a referee not calling a foul on one end of the court, but was then whistled for one on the opposite end.
The Kings scored just nine points in the first quarter, trailed by as many as 21 and were down by seven with 10 minutes left before rallying to complete Sacramento's first season sweep of the Bulls since 2006-07.
When asked if the chair was OK, Lopez replied, "I think so".
After the game, Lopez told ESPN he disagreed with the call and didn't believe he should have been given another technical.More news: PlayStation 4 firmware 5.50 beta released: Here's what's inside
More news: Here Are 5 Teams Who Could Sign CB Malcolm Butler This Offseason
More news: The Cloverfield Paradox gets a surprise Netflix release after Super Bowl
Not only was Lopez thrown out of the game after back-to-back technical fouls in the second quarter, had to be led off the court by Bulls coaches, but the team squandered a 16-point lead the rest of the way.
After Lopez reluctantly left the Golden 1 Center floor, he grabbed a chair in the tunnel leading toward the Bulls locker room and tossed it.
He also discussed his confusion on why the home crowd cheers for opposing players when they make a highlight play.