ISSN:
1573-9139
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions During service differentiated changes in properties and structure of the refractories across the thickness of the lining occur in the lining of the blast-furnace hearth. The most intense processes under the action of the slag and the gaseous medium occur in the working zone of the lining, which leads to a reduction in open porosity of the refractory to 6–10%, an increase in apparent density to 2.40–2.45 g/cm3 and in the compressive strength to 80–132 MPa, a decrease in the mullite content, and the formation of up to 12% glass, melilite, calcium ferrites, anorthite, and other minerals. The mechanism of lining failure in the blast-furnace hearth is a step-by-step multistage process of impregnation of the lining with solid, liquid, and gaseous substances, interaction of them with the refractory, and chemical, mechanical, and thermal failures of the newly formed constituents under the influence of various factors. Refractory blocks and type ShPD-42 brick based on kaolin raw material are recommended for lining the iron-notch apertures and the upper portion of the blast-furnace hearth.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01389949
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