Highly regenerative fireproof ball

Abstract

The heat accumulating refractory ball consists of high-aluminum alumina as aggregate 58-62 wt%, refined bauxite as stuffing 29-31 wt%, high-grade white clay as high temperature adhesive 9-11 wt% and paper pulp as adhesive 3 wt%. The high-aluminum alumina contains Al2O3 not less than 70 % and has granular size of 2-4 mm, the refined bauxite contains Al2O3 not less than 85 % and has granular size of 300 mesh, and the while clay contains Al2O3 not less than 36 %. The refractory ball of the present invention has good heat accumulating performance, bulk density of 2.6 g / cu cm and strength of 25 KN each ball, has less scaling and breaking, no jamming of ventilation channel and high heat utilization rate.

Description

technical field [0001] The invention relates to a heat storage material in an ironmaking hot blast stove, in particular to a high heat storage refractory ball. Background technique [0002] At present, the heat storage refractory ball used in the hot blast stove has a certain relationship with the density and hardness of the refractory ball besides its own composition and proportion, and the existing refractory ball Most of them are made of mixed materials, plus soft clay as a binder, and are made by traditional manual methods. The density and hardness of the refractory balls often have a certain gap with the performance required in production. The pebble bed is softened and bonded into a slag block, and the slagging is serious, which affects the heat storage performance. At the same time, due to the high pressure of the upper quenching hot air and the extrusion of the upper part, the refractory balls in the lower part are easily crushed or deformed, often blocking the air ...

AI Technical Summary

Problems solved by technology

[0002] At present, the heat storage refractory ball used in the hot blast stove has a certain relationship with the density and hardness of the refractory ball besides its own composition and proportion, and the existing refractory ball Most of them are made of mixed materials, plus soft clay as a binder, and are made by traditional manual methods. The density and hardness of the refractory balls often have a certain gap with the performance required in production. The pebble bed is softened and bonded into a slag block, and the slagging is serious, which affects the heat storage performance

At the same time, due to the high pressure of the upper quenching hot air and the extrusion of the upper part, the refractory balls in the lower part are easily crushed or deformed, often blocking the air duct, and the hot air cannot be sent to the blast furnace, which affects the production of the blast furnace. Therefore, maintenance and replacement are often required. Balls and other work, affecting the normal production