If you received an on the job injury during your employment, and were given a permanent partial disability rating, are you entitled to a settlement upon retirement?

There is no entitlement to settle. That is a voluntary thing the parties can agree to. Usually voluntary retirement decreases settlement value. Settlement value is determined based upon what the insurer will probably have to pay for on your case going forward. C Webber webberlawoffice.com

Yes if your employer has money to settle out your case