Anokhe Lal of Vitrohi village had come to Siya Ram's factory with his 'mentha', an aromatic herb plant used for extracting oil, on his tractor, police said.
He got into a verbal duel with four others, who were also waiting for their turn to extract the oil, Senior Superintendent of Police, Manjil Saini said.
Ram Singh, Virendra, Ajay Pal and one other threw him into the boiler resulting in his death, the SSP said adding a case has been registered against the four and efforts are on to arrest them.
