公开(公告)号：US3598618A

公开(公告)日：1971-08-10

申请号：US3598618D

申请日：1968-02-08

Applicant: AGENCY IND SCIENCE TECHN

Inventor： FUJII KINJIRO ,  ISHIDO YOSHIHIKO ,  MOTOE AKIHIRO

IPC: C04B35/03 ,  C04B33/00

CPC classification number: C04B35/03

Abstract: A SMALL AMOUNT OF STRONG ACETIC ACID REACTS WITH MAGNESIA OR MAGNESIUM HYDROXIDE TO FORM STRONLY COHERENT POROUS GRAINS OR PELLETS WHICH, AFTER BEING MOISTENED WITH A SMALL AMOUNT OF WATER, CAN BE SHAPED WITH OR WITHOUT ADDITION OF REFRACTORY FILLERS AND FIRED INTO POROUS MAGNESIA BODIES. A SLURRY PREPARED FROM MAGNESIA OF MAGNESIUM HYDROXIDE, ACETIC ACID, A SMALL AMOUNT OF WATER AND CHEMICAL FOAMING AGENT SOLIDFIES WITHIN A FEW MINUTES INTO A POROUS BODY WHICH CAN BE FIRED TO PRODUCE MAGNESIA BRICKS LIGHTER THAN WATER.

公开(公告)号：US3684558A

公开(公告)日：1972-08-15

申请号：US3684558D

申请日：1971-02-03

Applicant: AGENCY IND SCIENCE TECHN

Inventor： FUJII KINJIRO ,  MOTOE AKIHIRO ,  KASUGAI HOMURU

IPC: C04B38/00 ,  B01J2/00 ,  B01J2/14 ,  C04B14/02 ,  C04B38/08 ,  B44D1/08

CPC classification number: B01J2/14

Abstract: DROPLETS OF AN AQUEOUS SOLUTION OR SLURRY CONTAINING A POTENTIALLY TACKY SUBSTANCE ARE SPRAYED OVER A POWDER BED OF A REFRACTORY MATERIAL PREHEATED TO ABOUT 200*C.700*C., WHILE PRECAUTIONS ARE TAKEN TO INSURE THAT THE DROPLETS DO NOT COMBINE. THE WATER IN THE DROPLETS THUS BOILS ON SAID POWDER BED, WITH THE RESULT THAT THE TACKY SUBSTANCE IN THE DROPLETS ENROBES PARTILCES OF POWDER WHILE THE WATER EVAPORATES. THE ENROBED PARTICLES GRADUALLY SOLIDIFY INTO POROUS GRAINS.