Service of nonpowderable dinas in high-temperature stoves of blast furnaces

Conclusions

Experience with the use of low-powdered (low embrittlement) dinas in the high-temperature zones (walls, cupolas, combustion chamber, and checkers) of blast furnace stoves showed that at subcupola temperatures of 1350–1450°C after 3 years service the original physicochemical properties of the product were not impaired, and the structure had preserved its satisfactory condition.

A study of the properties of low-powdered dinas after service showed that despite the reduction in the density as a result of additional transition in the quartz, the structure of the dinas is not embrittled, but is densified.

Considering the relatively good deformation properties of the low-embrittlement dinas, its use should be tested in the operation of stoves with subcupola temperatures of 1500–1550°C.