Use of fireclay dust from rotary furnaces

Conclusions Dust removed by electric filters from the gases of rotary furnaces can be used for the preparation of firebrick articles. The composition of the bodies recommended is as follows; for standard brick 45% grog, 35% dust and 20% kaolin; for lightweight insulating brick 30% dust, 35% thermal-anthracite, 17.5% kaolin, and 17.5% Chasov-Yar clay.With combined firing into grog of kaolin and dust in the briquette it is possible to add not more than 20% dust; with an increase in the content the water absorption of the grog increases.When designing refractory factories in the complex of which we introduce rotary furnaces with electric filters, it is necessary to specify equipment for transporting dust into the body-preparation section with the aim of using it.The use of dust from rotary furnaces for the production of refractories will be a useful innovation for refractory workers in completing the directives of the 23rd congress of the party aimed at improving use of raw materials.The work was shared by L. S. Shchetina and S. D. Svidlo.