Charcoal bricks

Description of the nozzle brick

Charge bricks are heat conducting and heat storing elements made of refractory materials. Their heat exchange function is achieved by the inclusion of regular lattice holes in the brick structure. They are mainly used in regenerators of blast furnaces and in waste heat recovery systems of glass melting furnaces. Their structural characteristics include parallel permeable holes and positioning projections with recessed grooves. They have excellent volume stability and superior creep resistance at high temperatures.

Types materials are classified according to the working temperature: fireclay bricks (＜900℃) and high alumina bricks, mullite bricks, dinas bricks (＞900℃). The compressive strength is 35-55 MPa, and the refractory temperature is 1770-2000℃.

Main characteristics of the nozzle bricks

1. has a plurality of permeable lattice pores parallel to the lateral surfaces, as well as locating protrusions and locating grooves located on two parallel surfaces.

2. It has excellent volumetric stability, superior creep characteristics at high temperatures and high density with low porosity. Modern blast furnaces typically utilize a regeneration chamber with a lattice brick construction to heat blast furnace air.

Application of slip bricks

Charge bricks are mainly used in the blast furnaces и flame ovens.

Nozzle bricks are mainly used in the regeneration chambers of hot blast furnaces. They consist of bricks with a well-defined structure and perforations arranged in a certain order, with through holes at both ends to ensure unobstructed gas flow. Depending on the technical requirements of the different temperature zones, dynasic charge bricks or high alumina charge bricks are usually selected. In some hot blast furnaces, high alumina bricks, mullite bricks or dyna bricks can also be used.