| 摘要 |
Briquette for producing a foamed slag on stainless steel melts in an electric arc furnace, made up of mixtures of individual or multiple substances of following basic components:
O2 carrier Dust, sludge or slag with ≧10% FeO/Fe2O3,
Dust, sludge or slag with ≧1% Cr2O3,Dust, sludge or slag with ≧1% MnO,Dust, sludge or slag with ≧1% NiO,Scale with ≧10% FeO/Fe2O3,Gas carrier Dust with ≧40% CaCO3,Density adjuster Dust with FeCr,
Dust with Fe/low alloy fine scrap,Dust with Cr/ferritic fine scrap,Dust with Ni/austenitic fine scrap, grinding dust,Dust with Mn/ferritic or low alloy fine scrap,Reducing agent Carbon-containing substances ≧90% C,
Dust or fine granulate of coke, coal or graphite,Binder Molasses, cement, Ca(OH)2, in each case ≦5% by weight. |
| 主权项 |
1. Briquette for producing a foamed slag on stainless steel melts in an electric arc furnace, containing a mixture of metal oxides, limestone, carbon and a binder, which is introduced into the furnace and arranged there such that below the slag at a metal-slag interface, the metal oxides are reduced by the carbon, and the limestone is thermally dissociated, and gases produced in a process cause foaming of the slag by forming bubbles, characterized in that the briquette for use in a melt of stainless steel, low alloy steel or high alloy steel is made up of substances selected from a group of following basic components and consisting of:
O2 carrier selected from a group consisting of:
Dust, sludge or slag with ≧10% FeO and/or Fe2O3, by weight,Dust, sludge or slag with ≧1% Cr2O3, by weight,Dust, sludge or slag with ≧1% MnO, by weight,Dust, sludge or slag with ≧1% NiO, by weight,Scale with ≧10% FeO and/or Fe2O3 by weight, Gas carrier Dust with ≧40% CaCO3, by weight, Density adjuster 10%-16% by weight and selected from a group consisting of:
Dust with FeCr,Dust with Fe/low alloy fine scrap,Dust with Cr/ferritic fine scrap,Dust with Ni/austenitic fine scrap, grinding dust,Dust with Mn/ferritic or low alloy fine scrap, Reducing agent selected from a group consisting of:
Carbon-containing substances ≧90% C, by weight,Dust or fine granulate of coke, coal or graphite, Binder Molasses, cement, Ca(OH)2, in each case ≦5% by weight. |
