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: Complete dezincing of steel scrap is achieved by the addition of oils, whereupon the dissolution of iron is substantially suppressed through the autogenous inhibition effect of the oils. The steel scrap arising when the dezincing process has been completed is protected against corrosion by the remaining film of oil, the corrosion protection preventing the formation of iron oxide layers and thus blackening of the scrap material. The oil discharged with the dezincing solution can be separated as a pure phase by resorting to flotation in support of the process and can then be reused as an inhibitor.

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: The invention relates to a method for the agglomeration of iron-oxide-containing residual materials, in particular scale and mill scale, wherein the residual materials and paper sludge are dried and ground and agglomerates are produced, by hot briquetting, from a mixture of the residual materials and paper sludge so processed. In this manner, it is possible to produce mill scale briquettes of high strength and density. These briquettes can then be charged into an electric arc steelmaking furnace for the purpose of recycling the iron contained in the residual materials.

Abstract: The invention relates to a method for the agglomeration of iron-oxide-containing residual materials, in particular scale and mill scale, wherein the residual materials and paper sludge are dried and ground and agglomerates are produced, by hot briquetting, from a mixture of the residual materials and paper sludge so processed. In this manner, it is possible to produce mill scale briquettes of high strength and density. These briquettes can then be charged into an electric arc steelmaking furnace for the purpose of recycling the iron contained in the residual materials.

Abstract: The invention claims a method for the selective acidic dezincing of steel scrap. The selective complete dezincing is achieved by the addition of oils, whereupon the dissolution of iron being substantially suppressed through the autogenous inhibition effect of the oils. The steel scrap arising when the dezincing process has been completed is protected against corrosion by the remaining film of oil, said corrosion protection preventing the formation of iron oxide layers and thus blackening of the scrap material. The oil discharged with the dezincing solution can be separated as a pure phase by resorting to flotation in support of the process and can then be reused as inhibitor.