公开(公告)号：US3589919A

公开(公告)日：1971-06-29

申请号：US3589919D

申请日：1969-04-21

申请人： CORHART REFRACTORIES CO

发明人： NELSON MICHAEL A ,  PATRICK ROBERT F ,  WEHRENBERG THOMAS M

IPC分类号： C04B35/01 ,  C04B35/047 ,  C04B35/12 ,  C04B35/42 ,  C04B35/44

CPC分类号： C04B35/42 ,  C04B35/01 ,  C04B35/0473 ,  C04B35/12 ,  C04B35/44

摘要： COMPACTED AND BURNED REFRACTORY BODY MADE FROM SIZEGRADED PARTICULATE BATCH MIXTURE OF CHEMICAL GRADE (TRANSVAAL) CHROMITE GRAIN WITH LOW-SILICA CONTENT, DEADBURNED MAGNESITE GRAIN, AND FUSED MAGNESIA-CHEMICAL GRADE CHROMITE GRAIN CONTAINING 53-58% MGO. CHROMITE GRAIN FORMS 10-35% OF BATCH AS -10+150 MESH PARTICLES. OTHER TWO GRAINS FORM THREE PARTICLE FRACTIONS: 3060% OF BATCH BEING COARSE -4+20 MESH, 0-30% OF BATCH BEING INTERMEDIATE -10+35 MESH, AND FINE MAGNESITE GRAIN IS AT LEAST 10% OF BATCH. THE TOTAL +28 MESH PARTICLES OF CHROMITE GRAIN AND MAGNESITE GRAIN CONSTITUTE 4 TO LESS THAN 50% OF BATCH. BODY BURNED AT ABOUT 1600* C. CHARACTERIZED BY MODULUS OF RUPTURE AT 1340*C. CONSISTENTLY ABOVE 1700 P.S.I. AND AS HIGH AS 2000 P.S.I. OR HIGHER.