Production of diesel particle filter comprises extruding ceramic raw material to form formed honeycomb body with cells, drying and burning the honeycomb body, and closing end part of cell on the honeycomb body surface with slurry

摘要

The procedure for the production of a diesel particle filter (1), comprises extruding a ceramic raw material to form a formed honeycomb body (10) with cells (12), which are subdivided by porous partition walls (11), which are arranged in a honeycomb structural form, drying and burning the honeycomb body, and closing an end part of each cell on each end surface of the honeycomb body with slurry in a checker before or during the burning process to form a stopper (13). A downstream end of each cells and an upstream end of each cells, which forms a discharge passage, are clogged by the stopper. The procedure for the production of a diesel particle filter (1), comprises extruding a ceramic raw material to form a formed honeycomb body (10) with cells (12), which are subdivided by porous partition walls (11), which are arranged in a honeycomb structural form, drying and burning the honeycomb body, and closing an end part of each cell on each end surface of the honeycomb body with slurry in a checker before or during the burning process to form a stopper (13). A downstream end of each cell, which forms an introduction passage, through which exhaust gas is introduced, and an upstream end of each cell, which forms a discharge passage, by which the exhaust gas is discharged to the exterior of the filter, are clogged by the stopper. The burning step comprises a primary burning step and a secondary burning step at 1400-1450[deg] C. In the primary burning step, the burning step of the formed honeycomb body is burned at 1300-1400[deg] C and a temperature rising speed of the primary burning step is 50[deg] C/hours-A[deg] C/hours, where A[deg] C/hours= 150/B and B is a weight of the formed honeycomb body after the drying process.