Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
A casting powder for the continuous casting of steel based on silicate slags of the following chemical analysis ______________________________________
25-45% by wt. of SiO.sub.2
20-45% by wt. of CaO
1-16% by wt. of Al.sub.2 O.sub.3
0.1-15% by wt. of MgO
0.1-1.5%
by wt. of FeO
(20-45.1% by wt. of CaO + MgO)
0.05-10%
by wt. of TiO.sub.2
3-15% by wt. of Na.sub.2 O + K.sub.2 O
0.05-10%
by wt. of MnO
0-7% by wt. of B.sub.2 O.sub.3
3-10% by wt. of bound F
______________________________________ wherein the powder is pre-melted and foamed, then ground and passed through a sieve to ensure a maximum grain size of 5 mm, whereupon the grains are coated, by means of an adhesive, with a layer of 1.5 to 15% by weight of a member selected from the group consisting of carbon black and graphite and a mixture thereof.
Claim 2
Dependent Claim
143 words
A casting powder for the continuous casting of steel based on silicate slags of the following chemical analysis ______________________________________
25-45% by wt. of SiO.sub.2
20-45% by wt. of CaO
1-16% by wt. of Al.sub.2 O.sub.3
0.1-15% by wt. of MgO
0.1-1.5%
by wt. of FeO
(20-45.1% by wt. of CaO + MgO)
0.05-10%
by wt. of TiO.sub.2
3-15% by wt. of Na.sub.2 O + K.sub.2 O
0.05-10%
by wt. of MnO
0-7% by wt. of B.sub.2 O.sub.3
3-10% by wt. of bound F
______________________________________ wherein the powder is pre-melted and foamed, then ground and passed through a sieve to ensure a maximum grain size of 5 mm, whereupon the grains are coated, by means of an adhesive, with a layer of 1.5 to 15% by weight of a member selected from the group consisting of carbon black and graphite and a mixture thereof.
Claim 3
Dependent Claim
20 words
The casting powder according to claim 1, wherein the bulk weight obtained by foaming is between 0.8 and 1.2 kg/l.
Claim 4
Dependent Claim
32 words
The casting powder according to claim 1 wherein the grain size is at most 2 mm and for 98% by weight of the individual grains, the minimum grain size is 0.1 mm.
Claim 5
Dependent Claim
33 words
The casting powder according to claim 1, wherein the individual grains are coated with 2-6% by weight of said member selected from the group consisting of carbon black, graphite and a mixture thereof.
Claim 6
Independent Claim
161 words
A method for producing a casting powder for the continuous casting of steel based on a silicate slag with the following chemical analysis ______________________________________
25-45% by wt. of SiO.sub.2
20-45% by wt. of CaO
1-16% by wt. of Al.sub.2 O.sub.3
0.1-15% by wt. of MgO
0.1-1.5%
by wt. of FeO
(20-45.1% by wt. of CaO + MgO)
0.05-10%
by wt. of TiO.sub.2
3-15% by wt. of Na.sub.2 O + K.sub.2 O
0.05-10%
by wt. of MnO
0-7% by wt. of B.sub.2 O.sub.3
3-10% by wt. of bound F
______________________________________ the steps comprising: initially melting and foaming a powder having the aforementioned slag chemical analysis to produce a foamed slag; grinding said foamed slag to produce grains; passing said grains through a sieve so a maximum grain size of 5 mm is achieved; and coating said grains with a layer of 1.5 to 15% by weight of a member selected from the group consisting of carbon black, graphite and a mixture thereof.
Claim 7
Independent Claim
161 words
A method for producing a casting powder for the continuous casting of steel based on a silicate slag with the following chemical analysis ______________________________________
25-45% by wt. of SiO.sub.2
20-45% by wt. of CaO
1-16% by wt. of Al.sub.2 O.sub.3
0.1-15% by wt. of MgO
0.1-1.5%
by wt. of FeO
(20-45.1% by wt. of CaO + MgO)
0.05-10%
by wt. of TiO.sub.2
3-15% by wt. of Na.sub.2 O + K.sub.2 O
0.05-10%
by wt. of MnO
0-7% by wt. of B.sub.2 O.sub.3
3-10% by wt. of bound F
______________________________________ the steps comprising: initially melting and foaming a powder having the aforementioned slag chemical analysis to produce a foamed slag; grinding said foamed slag to produce grains; passing said grains through a sieve so a maximum grain size of 5 mm is achieved; and coating said grains with a layer of 1.5 to 15% by weight of a member selected from the group consisting of carbon black, graphite and a mixture thereof.
Claim 8
Dependent Claim
19 words
The method according to claim 5, wherein the bulk weight obtained by foaming is between 0.8 and 1.2 kg/l.
Claim 9
Dependent Claim
31 words
The method according to claim 5, wherein the grain size is at most 2 mm, and for 98% by weight of the individual grains, the minimum grain size is 0.1 mm.
Claim 10
Dependent Claim
32 words
The method according to claim 5, wherein the individual grains are coated with 2-6% by weight of said member selected from the group consisting of carbon black, graphite and a mixture thereof.