24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No. 328/DEL/1999 A (22) Date of filing of Application: 25/02/1999
(54) Title of the invention: “A PROCESS FOR MAKING CERAMICTILE FROM BLAST FURNACE
SLAG AND CLAYEY.”
(51) International Classification 7 :
C04B 5/00, C94B 18/14
(30) Priority Data :
(31) Document No.:NIL
(32) Date : NIL
(33) Name of convention country : NIL
(66) Filed U/s 5(2) : NIL
(61) Patent of addition to application No. :
NA
(62) Filed on : NA
(63) Divisional to Application No. :NIL
(64) Filed on : NA
Total No of Pages: 13
(71) Name of the applicant:
COUNCIL OF SCIENTIFIC INDUSTRIAL &
RESEARCH
Address of the Applicant:
Rafi Marg New Delhi–110001
(72) Name of the Inventor:
SACHCHIDANANDA CHAKRABARTI,
SYAMAL GHOSH,
MIHIR DAS,
SANDAR GHATAK,
(57) Abstract:
A process for making ceramic tile from blast furnace slag and clayey materials.
The process of the present invention can be used to produce ceramic tiles form iron blast
furnace slag and clayed materials for use as floor tiles, wall tile and kitchen table top. Blast furnace
slag contains silica, alumina and calcium oxides as principal constituents which range in 25–40%,
5–35% and 30–50% by weight respectively. Magnesium oxide content may vary from 1–25% by
weight. The composition depends on the source and process of iron making. In corporation of clay
in the original batch composition results in overall increase in silica and reduction of alumina and
lime.
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