The ball-lacking grate for hot blast stove was successfully produced out with correctly selecting casting process parameters according to cast structure and adopting moulding process with core-composing of water glass sand and resin sand.

The assembly of the column,the grate,the equipments and the tubes of the air heater of 3 200 m3 BF is introduced.

By using resin sand to make mo ulds and cores and adopting a series of process mea-sures,the grates for blast heating furnace were produced.

A heat transfer mathematical model of pebble stove grate was set up by using finite element software,the simulation to the furnace grate behaviors under unsteady state was performed based on the model.

It is heplful to the gasifier modification, such as furnace enlargement, fire grate improvement, etc.

Many measures have been taken to improve oxygen enriched gas making furnace such as increasing grate rotating speed, prolonging the chamber of furnace, adding cyclone at the furnace outlet Good results have been obtaine

The design, development, studying and fabricating process for the coal gas furnace grate in each historic stage as well as the actual application situation in the small and intermediate sized nitrogen fertilizer plant, the development tendency of grate was discussed from the aspects of grate height and air distribution structure design.