Abstract: Disclosed is a method of fabricating a construction element, the method comprising the manufacturing of a construction element including a slag, wherein the slag is comprising, on a dry basis and whereby the presence of a metal is expressed as the total of the metal present as elemental metal and the presence of the metal in an oxidized state, a) at least 7% wt and at most 49% wt of iron, Fe, b) at most 1.3% wt of copper, Cu, c) at least 24% wt and at most 44% wt of silicon dioxide, SiO2, d) at least 1.0% wt and at most 20% wt of calcium oxide, CaO, e) at least 0.10% wt and at most 1.50% wt of zinc, Zn, f) at least 0.10% wt and at most 2.5% wt of magnesium oxide, MgO, and g) at most 0.100% wt of lead, Pb. Further disclosed are improved construction elements comprising the slag.

Abstract: Disclosed is a single-chamber furnace for fuming an evaporable metal or metal compound from a metallurgical charge including a bath furnace for containing a molten charge up to a determined level, the furnace being equipped with a non-transferred plasma torch for the generation of plasma and a first submerged injector for injecting the plasma below the determined level, the furnace further including an afterburning zone to form an oxidized form of the at least one evaporable metal or metal compound, and a recovery zone for recovering the oxidized form from the gas formed in the afterburning zone, whereby the furnace is further equipped with a second submerged injector for injecting extra gas into the furnace below the determined level. Further disclosed is the use of the furnace and a process for fuming an evaporable metal or metal compound from a metallurgical charge.

Abstract: Disclosed is a method of fabricating a construction element, the method comprising the manufacturing of a construction element including a slag, wherein the slag is comprising, on a dry basis and whereby the presence of a metal is expressed as the total of the metal present as elemental metal and the presence of the metal in an oxidized state, a) at least 7% wt and at most 49% wt of iron, Fe, b) at most 1.3% wt of copper, Cu, c) at least 24% wt and at most 44% wt of silicon dioxide, SiO2, d) at least 1.0% wt and at most 20% wt of calcium oxide, CaO, e) at least 0.10% wt and at most 1.50% wt of zinc, Zn, f) at least 0.10% wt and at most 2.5% wt of magnesium oxide, MgO, and g) at most 0.100% wt of lead, Pb. Further disclosed are improved construction elements comprising the slag.

Abstract: Disclosed is a slag comprising, on a dry basis and expressed as the total of the metal present as elemental metal and the presence of the metal in an oxidized state, a) at least 7% wt and at most 49% wt of Fe, b) at most 1.3% wt of Cu, c) at least 24% wt and at most 44% wt of SiO2, and d) at least 2.0% wt and at most 20% wt of CaO, characterised in that the slag comprises, on the same basis, e) at least 0.10% wt and at most 1.00% wt of Zn, f) at least 0.10% wt and at most 2.5% wt of MgO, and g) at most 0.100% wt of Pb. Further disclosed are an improved object comprising the slag, a process for the production of the slag, and a number of uses of the slag, whereby the slag may comprise up to at most 1.50% wt of zinc and down to 1.0% wt of CaO.

Abstract: Disclosed is a slag comprising, on a dry basis and expressed as the total of the metal present as elemental metal and the presence of the metal in an oxidized state, a) at least 7% wt and at most 49% wt of Fe, b) at most 1.3% wt of Cu, c) at least 24% wt and at most 44% wt of SiO2, and d) at least 2.0% wt and at most 20% wt of CaO, characterised in that the slag comprises, on the same basis, e) at least 0.10% wt and at most 1.00% wt of Zn, f) at least 0.10% wt and at most 2.5% wt of MgO, and g) at most 0.100% wt of Pb. Further disclosed are an improved object comprising the slag, a process for the production of the slag, and a number of uses of the slag, whereby the slag may comprise up to at most 1.50% wt of zinc and down to 1.0% wt of CaO.