Use of Kempiraisk chromite for the production of magnesiospinel refractories

Conclusions

Kempiraisk chromite makes it difficult for magnesiospinel articles to be sintered in the refractory-production furnaces. In order to obtain good quality periclase-chromite articles based on Kempiraisk chromite under the conditions pertaining at the Combine, it is necessary to coarsen the chromite fraction to 5–0.5 mm, reduce its concentration in the batch to 20–27%, and to increase the firing temperature to 1580–1590°C after first reconstructing the gas-fired chamber furnaces.