A pickling system for surface treatment, using a pickling medium, of strip steel in the form of standard steel, electric strip, high-grade steel, and extra-high-strength and ultra-high-strength third-generation steel in order to thereby provide a surface suitable for a subsequent shaping process for further processing. The system includes a plurality of treatment tanks connected in series. The pickling system has a modular construction and, starting from the strip infeed, at least one first treatment tank in the form of a dipping bath module is provided in the working direction, downstream of which a plurality of treatment tanks in the form of spray pickling modules are arranged, and at least one final second dipping bath module is arranged downstream of the spray pickling modules.

A nozzle head for descaling rolling stock, said rolling stock moving relative to said nozzle head, is adapted to be mounted for rotation about an axis of rotation relative to a surface of said rolling stock. Said nozzle head comprises a plurality of nozzles adapted to spray a liquid on said rolling stock, wherein said nozzles are positioned at different radial distances from said axis of rotation.

The disclosure relates to a device (10) and a method for machining at least one surface of a continuous strip material (B) made of non-ferrous metals, which in particular comprises aluminum or aluminum alloys or consists of such materials. A rotating roller brush (12) is used, the roller length of which can be brought into contact with a surface of the strip material (B). Such roller brush (12) has a diameter of 200 mm to 1,000 mm and can rotate at a rotational speed of 100 to 3,600 rpm using an assigned motor drive (14).

The disclosure relates to a device (10) and a method for machining at least one surface of a continuous strip material (B) made of non-ferrous metals, which in particular comprises aluminum or aluminum alloys or consists of such materials. A rotating roller brush (12) is used, the roller length of which can be brought into contact with a surface of the strip material (B). Such roller brush (12) has a diameter of 200 mm to 1,000 mm and can rotate at a rotational speed of 100 to 3,600 rpm using an assigned motor drive (14).

A process for forming a descaling composition has the steps of macerating a bone meal with a dimethylamine solution, digesting the macerated bone meal with hydrochloric acid, neutralizing the digested bone meal with calcium oxide, treating the neutralized bone meal with sulfuric acid, and applying a refluxing treatment with dimethylamine and hydrazine hydrate. The process further includes removing the macerated bone meal solids from the dimethylamine solution and transferring the removed solids to an extraction tower prior to the step of digesting. The hydrochloric acid is circulated through the macerated bone meal. The treated bone meal and the sulfuric acid is filtered so as to produce a liquid phase and a solids phase. The liquid phase contains a phosphate amine. The dimethylamine and hydrazine hydrate are added to the liquid phase.

Methods and systems are provided for treating oxide scale on the surface of a metal object. In one embodiment, a system temperature control apparatus controls the temperature of metal object's surface to an application temperature below the Leidenfrost temperature point of an alkali metal hydroxide aqueous conditioning solution. An application apparatus wets the metal object's surface at the controlled temperature with a thin layer of the solution that engages the oxide scale, and a heating apparatus heats the wetted surface to a final conditioning temperature above a melting point of the alkali metal hydroxide by an additional value selected to effect conditioning of the oxide scale at a reasonable but not excessive rate by the melting alkali metal hydroxide reacting with the oxide scale. The system terminates additional conditioning to prevent creation of additional oxide scale beyond the conditioned depth.

A method for producing a FeCr alloy comprises: rolling a slab having a chemical composition containing, by mass %, C: 0.020% or less, Si: 0.01% to 1.5%, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 16.0% to 30.0%, Al: 2.0% to 6.5%, N: 0.020% or less, and Ni: 0.50% or less, with the balance being Fe and inevitable impurities to obtain a sheet material; subjecting the sheet material to siliconizing treatment by a thermal CVD method to obtain a FeCr alloy having a Si content of more than 1.5 mass % and 10.0 mass % or less and satisfying:
14.0%?Si+1.15?% Al+0.35?% Cr(1)
where % Si, % Al, and % Cr indicate Si, Al, and Cr contents, by mass %, respectively in the chemical composition of the FeCr alloy.

A control for a sheet metal processing line with a descaler includes sensors that adjust the spray blast pattern produced by impellers and the sheet advancement rate during descaling. The control may position a nozzle of the impeller so when a surface condition of the edge of the sheet is more favorable than that of the center of the sheet, the impeller spray concentration moves toward the center, and when a surface condition of the center of the sheet is more favorable than that of a respective edge of the sheet, the impeller spray concentration moves away from the center of the sheet. The control may raise the sheet advancement rate when the surface condition of the center of the sheet is more favorable than a standard, and lower the sheet advancement rate when a surface condition of the center of the sheet is less favorable than a standard.

An oscillating descaler (1) for semi-finished metallurgical products comprises:a passageway (2) delimited by two opposite input and output sections (3, 4) crossable by a semi-finished product (10) to be descaled according to a rectilinear crossing direction (X) oriented from the input section (3) to the output section (4),a manifold (20) for a pressurized fluid extended according to a longitudinal direction (Y) defined between first and second longitudinally opposite ends (21, 22), arranged so that the longitudinal direction (Y) is not parallel to the crossing direction (X),at least one nozzle (30) for spraying a jet (31) according to a spray direction (Z) which is coaxial to a hole (30a) of the nozzle (30) and inclined towards the input section (3) and towards one of the ends (21, 22) of the manifold (20, 20b),motor means (M) for generating a rectilinear oscillating motion of the jet (31) along the longitudinal direction (Y).

Coils of sheet metal and individual sheets of sheet metal having a thickness of greater than 0.074 inches are descaled in a processing line. The processing line has a cut to length portion, a conveyor, a destacker, and an apparatus for descaling the sheet metal by propelling one of grit and slurry against the sheet metal using an impeller wheel. The descaling apparatus has pinch rollers in an interior of the descaling apparatus. The processing line is configurable for processing a coil format by directing the sheet metal from the cut to length portion of the processing line through the descaling apparatus via the conveyor without processing through the destacker. The processing line is alternatively configurable for processing individual sheets of the sheet metal by directing the sheet metal from the destacker through the descaling apparatus via the conveyor without processing in the cut to length portion.