US2016222479A1PendingUtilityA1

Desulfurization composition

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Assignee: NAT CHUNG-HSING UNIVPriority: Feb 2, 2015Filed: Jan 29, 2016Published: Aug 4, 2016
Est. expiryFeb 2, 2035(~8.6 yrs left)· nominal 20-yr term from priority
Inventors:Wei WuChi-Ming LinChia-Chun LiKun-Hsien Lin
C21C 7/0645C21C 7/064
39
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Claims

Abstract

A desulfurization composition includes calcium oxide, silicon dioxide and aluminum oxide. The desulfurization composition is free of an alkali metal oxide. Aluminum oxide is present in an amount ranging from 20 to 26 wt % based on the total weight of the desulfurization composition, and the weight ratio of calcium oxide to aluminum oxide is within a range of 2.19 to 3. A method for desulfurizing molten steel using the desulfurization composition is also disclosed.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A desulfurization composition comprising calcium oxide, silicon dioxide and aluminum oxide,
 wherein said desulfurization composition is free of an alkali metal oxide, and   wherein aluminum oxide is present in an amount ranging from 20 to 26 wt % based on the total weight of said desulfurization composition, and the weight ratio of calcium oxide to aluminum oxide is within a range of 2.19 to 3.   
     
     
         2 . The desulfurization composition as claimed in  claim 1 , wherein calcium oxide is present in an amount ranging from 57 to 60 wt % based on the total weight of said desulfurization composition. 
     
     
         3 . The desulfurization composition as claimed in  claim 1 , wherein silicon dioxide is present in an amount ranging from 7 to 17 wt % based on the total weight of said desulfurization composition. 
     
     
         4 . The desulfurization composition as claimed in  claim 1 , further comprising magnesium oxide. 
     
     
         5 . The desulfurization composition as claimed in  claim 4 , wherein magnesium oxide is present in an amount ranging from 1 to 10 wt % based on the total weight of said desulfurization composition. 
     
     
         6 . A method for desulfurizing molten steel comprising mixing the desulfurization composition as claimed in  claim 1  with molten steel.

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