Labour's shadow chancellor stood his ground over the need for pay restraint in the public sector when he addressed delegates.
Ed Balls received polite applause after attacking the Government's "failed" economic policies and calling for alternatives, but it turned to heckling when he made it clear he would not change his mind on public sector pay despite sparking anger last year by supporting restraint.
Delegates later held a fiery debate over how to respond to the Government's "damaging" austerity measures and approved a motion calling for "far reaching campaigns, including the consideration and practicalities of a general strike."
Steve Gillan, leader of the Prison Officers Association, which proposed the idea, said there had to be a "robust" response, adding: "It does not mean we will have a general strike tomorrow, but we should have that in our armoury, because this Government is not afraid or embarrassed to do what it is doing to society.
"We need to make up our mind which direction we are going in, and we should not be afraid to mention the words general strike."