CERAMIC MASS FOR CERAMIC ARTICLE MAKING Russian patent published in 1997 - IPC

FIELD: building materials. SUBSTANCE: ceramic mass has clay and ferronickel slag after magnetic separation at the following ratio of components, wt. -%: magnetic component, 11-12 and nonmagnetic component; the balance at the following total ratio of components, wt.-%: ferronickel slag, 80-90; and clay, 10-20. Clay breaking up is carried out in water in volume 30-35% of clay mass. Ferronickel slag is ground up to size 0-0.14 mm, dried at 200-250 C for 0.3-0.5 h followed by magnetic separation and magnetic component extraction and decrease its content in slag to 11-12 wt.-%. Ground and separated off slag is stirred with broken clay for 10-15 min and from the obtained mass articles were pressed and calcined at 1000 C for 45-48 h. Article properties: water absorption is 5-7%, compression strength limit is 25-60 MPa, bending strength limit is 9.5-20.5 MPa, hardiness is 50 cycles, average density is 2.0-2.3 g/$$$. EFFECT: improved quality and property of ceramic articles. 2 tbl