Conclusions
Pressing large high-density products from fine powdered aiuminosilicate bodies has a number of specific features which need to be considered in selecting design and technical cycles.
The large amounts of material to be pressed make it necessary also to arrange the use of weigh batching for each raw material.
A solution was found to the problem of greatly reducing the segregation of the body when it was being poured into the mold and eliminating irregular moisture content.
Vacuum processing the body placed in the mold reduces the cycle time by facilitating the change from multistage to double-stage compression.
A vacuum of up to 500 mm Hg is possible in the equipment developed.
It is very desirable to increase the degree of vacuum for further reducing the pressing cycle for this type of refractory product.
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Literature cited
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R. Ya. Popil'skii and F. V. Kondrashev, Pressing Ceramic Powders [in Russian], Metallurgiya (1968), pp. 205–258.
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Translated from Ogneupory, No. 10, pp. 9–14, October, 1968.
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Min'kov, D.B., Gromov, V.I. & Popil'skii, R.Y. Pressing refractory blocks from finegrain bodies on hydraulic presses. Refractories 9, 616–620 (1968). https://doi.org/10.1007/BF01283515
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DOI: https://doi.org/10.1007/BF01283515