Abstract: The invention relates to a method of agglomerating iron oxide-containing residual substances, in particular scale and mill scale, wherein the residual materials and the paper sludge are dried and comminuted and agglomerates are produced by means of hot briquetting from the mixture comprising the residual substances and the paper sludge. In this way, mill scale briquettes of high strength and density can be produced which in steelmaking processes can then be charged into an electric arc furnace for the purpose of recycling the iron contained in the residual substances.

Abstract: This arc start material for electroslag remelting comprises an aggregate of curled turning chips of superalloy. This arc starting method for electroslag remelting comprises starting electroslag remelting by generating an arc between a primary ingot electrode including a primary ingot and an arc start material for electroslag remelting, wherein the primary ingot electrode is energized while contacting with the arc start material for electroslag remelting including an aggregate of curled turning chips of superalloy, and then an arc is generated between the primary ingot electrode and the arc start material for electroslag remelting of superalloy by separating the primary ingot electrode from the arc start material for electroslag remelting of superalloy.

Abstract: An object of the invention is to make it possible to produce a copper alloy in which the S content is reduced with no contamination with Al, which has a good casting surface and good internal properties and in which eutectic compounds are refined. The invention relates to a slag for electroslag remelting for copper alloy, including CaF2: 20 to 45% by mass, CaO: 10 to 30% by mass, SiO2: 10 to 30% by mass, LiF: 10 to 20% by mass, and ZrO2: 5 to 15% by mass with other impurities: at most 1% by mass, and satisfying a formula: 17.0(LiF content+ZrO2 content)?556?CaF2 content?4.1(LiF content+ZrO2 content)?80.9, and the invention relates to a method for producing a copper alloy with the slag.

Abstract: An object of the invention is to make it possible to produce a copper alloy in which the S content is reduced with no contamination with Al, which has a good casting surface and good internal properties and in which eutectic compounds are refined. The invention relates to a slag for electroslag remelting for copper alloy, including CaF2: 20 to 45% by mass, CaO: 10 to 30% by mass, SiO2: 10 to 30% by mass, LiF: 10 to 20% by mass, and ZrO2: 5 to 15% by mass with other impurities: at most 1% by mass, and satisfying a formula: 17.0 (LiF content+ZrO2 content)?556?CaF2 content?4.1 (LiF content+ZrO2 content)?80.9, and the invention relates to a method for producing a copper alloy with the slag.

Abstract: This arc start material for electroslag remelting comprises an aggregate of curled turning chips of superalloy. This arc starting method for electroslag remelting comprises starting electroslag remelting by generating an arc between a primary ingot electrode including a primary ingot and an arc start material for electroslag remelting, wherein the primary ingot electrode is energized while contacting with the arc start material for electroslag remelting including an aggregate of curled turning chips of superalloy, and then an arc is generated between the primary ingot electrode and the arc start material for electroslag remelting of superalloy by separating the primary ingot electrode from the arc start material for electroslag remelting of superalloy.

Abstract: The invention relates to a hydraulic mineral composition which is characterized in that it comprises a vitreous or crystallised matrix based on magnesium and calcium silico-aluminates which represent at least 25 wt.-%, and preferably 30 wt.-%, of the composition, one or more mineral oxides and optionally one or more specific mineral halides which are selected from among the oxides and halides of Ti, V, Cr, Mn, Co, Ni, Cu, Pb, Ba, Sr, P, S, Na, K, Zr, Mo, Be, Tl, As, Sn and Cd and which represent at least 5 wt.-% of the composition, at most 31 wt.-% alumina (Al2O3), less than 10 wt.-% ferrite, and less than 0.05 wt.-%, and preferably less than 0.01 wt.-%, C in relation to the weight of the composition.

Abstract: A low cost steel desulphurating agent includes, compared with the total weight of the agent, at least 10% of SiO2, at least 10% of C2S, and at least 35% of at least one of calcium aluminate or calcium silico-aluminate. The desulphurating agent can include, compared with the total weight of the agent, the following mineralogical phases: 10 to 60% of C2S, 0 to 50% of C3A, 0 to 50% of C2AS, 0to 70% of C12A7, and 0 to 60% of CA.

Abstract: A pellet, intended for the late inoculation of cast irons, obtained by agglomeration of a powdered inoculant, characterised in that the mass proportion of the granulometric fraction 50-250 microns of the powdered inoculant of which the pellet is constituted is comprised between 35 and 60%, and the mass proportion of the granulometric fraction below 50 microns is lower than 25%.

Abstract: A molten metal is subjected to a refining under a reduced pressure of vacuum or a low oxygen partial pressure atmosphere, and subsequently heated by means of inert gas plasma to re-refine. The metals to be processed are stainless steels, Ni-base alloys, Fe--Ni system alloys, electromagnetic steels, medium carbon structural steels having low nitrogen and low sulfur, and high carbon alloy tool-steels whose carbon, oxygen and/or sulfur content is strictly limited. In re-refining, any one of CaO and CaF.sub.2, CaO and Al.sub.2 O.sub.3, and CaO, CaF.sub.2 and Al.sub.2 O.sub.3 is used. For example, an Fe--Ni system alloy having 0.01% carbon and sulfur 0.005% can be produced.

Abstract: A blended charge for use as a decarburizing addition to a steelmaking batch comprises 50 to 95% by weight of an iron-carbon alloy and 5 to 50% by weight oxide material. The oxide material includes free metal oxides in excess of 0.25% by weight having an affinity for oxygen less than or equal to carbon in the molten steel.