Clay refractory bricks for blast furnace

Clay refractory bricks for blast furnaces should be made of refractory clay for the lining of blast furnace walls. Clay refractory bricks for blast furnaces are used for the throat, shaft, hearth, bottom of the small blast furnace lining and the furnace shaft of the large blast furnace.

Clay refractory bricks for blast furnace require high compressive strength of fireproof materials at room temperature, which can resist long-term work damage of recycled waste materials; small volume shrinkage under long-term work at high temperature is beneficial to maintaining the comprehensiveness of the furnace lining; low apparent porosity and Fe:O. The low water content can reduce the accumulation of the carbon plant in the vent hole and prevent the refractory bricks from swelling and loosening and being destroyed during the whole application process; low melting point substances are produced less. Clay refractory bricks for blast furnaces have better properties than ordinary clay bricks.

The cross-section spallation of clay refractory bricks for blast furnaces has requirements:

(1) When the total width of the spall does not exceed 0.25mm, the length is not limited;

(2) When the total spall width is 0.26～0.5mm, the length should not exceed 15mm;

(3) When the total width of the spall exceeds 0.50mm, it is forbidden.

The cross-sectional cracks of clay refractory bricks have requirements:

(1) When the total width of the spall does not exceed 0.25mm, the length is not limited;

(2) When the total spall width is 0.26～0.50mm, the length should not exceed 40mm;

(3) Spalling is prohibited when the total width exceeds 0.5mm.

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