| Autor: |
L. N. Nikulina, А S. Tinigin, T. G. Tishina, L. A. Babkina, V. V. Primachenko, I. V. Khonchik |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Scientific research on refractories and technical ceramics. 118:56-68 |
| ISSN: |
2663-3566 |
| DOI: |
10.35857/2663-3566.118.06 |
| Popis: |
Investigations of the amount influence of corundum-zirconium-silicate material on the properties of ramming mullite-corundum mass of MMK-90 grade and samples from it are carried out. The optimum amount of the above material (40 % by weight) is established, the use of which in the composition of ramming mullite-corundum mass provides an increase in thermal shock resistance of the samples made of it (~ 2.0 times more) with sufficiently high strength properties and slag resistance, albeit lower, especially significant in strength, than samples without corundum-zirconium-silicate material. As a result of the carried out researches a new type of production is developed — ramming mullite-corundum mass of MMKTS grade with zirconium-containing component. The ramming mass of developed composition is characterized by the following indices of physical and chemical properties: Al2O3 — not less than 87.0 %; SiO2— within the range of 5.0—7.0 %; ZrO2 — in the range of 1.0—3.0 %; Fe2O3 — not more than 1.0 %; P2O5 — in the range of 2.5—3.5 %; grain composition, mm — 3—0; cold crushing strength of samples from the mass after firing at a temperature of 1580 оC is not less than 80.0 N/mm2. The developed ramming mass is recommended for making monolithic linings of thermal units with a service temperature of up to 1700 оC, in particular induction channel and crucible furnaces operating under conditions of sharp temperature fluctuations that occur during cyclic operation or unforeseen stops of the unit. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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