DISPOSITIVO E PROCESSO PARA A FABRICACAO DE UM GAS APROPRIADO PARA ENDURECER PELOTAS DE MINERIO DE FERRO

摘要

Iron ore pellets on a grid in a treatment chamber are hardened by contact with a heat treated, low calorific gas. The gas is generated in the gasification chamber of a slag bath generator. The generator receives a gasification agent and solid fuel that preferably further includes sulfur-binding materials, such as dolomite for generating a stream of low calorific gas. Inclined water-cooled pipes at the upper end of the slag bath generator extract liquid slag from the gas stream. The slag drips from the pipes into the slag bath generator. A mixing chamber receives the gas at a temperature of about 1450 DEG C passed beyond the inclined water-cooled pipes together with an air supply for heat treating the gas to a temperature of about 1100 DEG C. The heat treated gas is then passed into the treatment chamber for hardening the iron ore pellets contained therein.