ORE-POWDER CAKING MATERIAL FOR ENHANCING HOT STRENGTH, PELLET MADE WITH THE SAME, AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2009/014255

A1

An ore-powder caking material which is for use in enhancing hot strength in pelletizing an ore powder. It is equal or superior in cold strength to conventional caking materials and is excellent in the impartation of hot strength. Also provided are a pellet made with the caking material and a process for producing the pellet. The ore-powder caking material for enhancing hot strength comprises either or both of cement and lime, slag, and a siliceous substance and has a chemical composition comprising CaO, Al2O3, and SiO2, wherein the contents of CaO, Al2O3, and SiO2 are 3-56%, 3-40%, and 30-86%, respectively, based on the sum of these. The caking material may be one in which the proportion of the either or both of cement and lime is 1-76 parts, that of the slag is 2-95 parts, and that of the siliceous substance is 2-95 parts. The caking material may be one which further includes gypsum. The pellet comprises an ore powder, the caking material, and water. The pellet may be one in which the amount of the caking material is 3-20 parts per 100 parts of the ore powder, and the water/(ore powder + the caking material) ratio is 0.03-0.3.

MORI TAIICHIRO (JP)
YOSHINO RYOETSU (JP)
ISHIDA ATSUMU (JP)
ANDO TETSUYA (JP)

PCT/JP2008/063709

January 29, 2009

July 24, 2008

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DENKI KAGAKU KOGYO KK (JP)
MORI TAIICHIRO (JP)
YOSHINO RYOETSU (JP)
ISHIDA ATSUMU (JP)
ANDO TETSUYA (JP)

C22B1/243; C21B5/00; C22B1/16

JPS62253737A	1987-11-05
JP5073707B2	2012-11-14
JPS50130615A	1975-10-16
JP2007191748A	2007-08-02

MATSUMOTO, Satoru (Taiho Building 5th Floor17-6, Kyobashi 1-Chom, Chuo-Ku Tokyo 31, JP)

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