While the specific laws and regulations vary depending on the location, it is possible that you could receive a ticket for impeding traffic, regardless of whether you were driving below the speed limit or not.
In some places, the left lane is designated as a passing lane, and it is expected that slower-moving vehicles will use the right lanes, allowing faster traffic to pass on the left. If you were driving significantly below the speed limit in the left lane and impeding the flow of traffic, law enforcement officers may decide to issue a ticket or citation for this offense.
It's important to note that traffic laws can vary by jurisdiction, so it's best to consult the specific laws and regulations of your location or seek legal advice for accurate information regarding your situation.