Abstract: Provided is a method for recovering lithium from a waste lithium battery cell including: heat treating a mixture including a waste lithium battery cell and an additive; and trapping a lithium salt produced in the heat treating.

Abstract: An apparatus for controlling coating weight coated on a strip by using an air knife disposed in a travelling direction of the strip in a continuous plating process in which the strip is dipped in a molten metal pot and is coated includes: a prediction model unit including a prediction model in which a neural network is trained with accumulated operation conditions; and an optimum air knife condition calculation unit configured to derive an absolute value of at least one of an air knife gap and an air knife pressure by using the prediction model based on an input operation condition.

Abstract: A melt transportation apparatus according to an embodiment of the present invention comprises: a container having an internal space in which melt can be accommodated and an opening through which the melt can be input/output; a cover part which has a cover member capable of closing the opening and which is positioned at the top of the container so as to be movable forward/backward with respect to the opening; and a support part having a rotary body, which can move forward/backward with respect to the cover part at the bottom of the cover part so that the support part can be in contact with the cover part. Therefore, according to embodiments of the present invention, the opening of the container can be easily opened/closed in a limited space. In addition, when the opening is opened/closed by moving the cover part, sagging or tilting of the cover part can be prevented. Thus, the cover part can be easily moved and exposure of at least a portion of the opening to the outside can be prevented.

Abstract: A non-oriented electrical steel sheet, according to one embodiment of the present invention includes, by weight %, Si: 3.0 to 4.0%, Al: 0.3 to 1.5%, Mn: 0.1 to 0.6%, at least one from among Sn and Sb: 0.006 to 0.1%, C: 0.0015 to 0.0040%, Cr. 0.01 to 0.03%, Cu: 0.003 to 0.008%, Mg: 0.0005 to 0.0025%, and a balance of Fe and inevitable impurities.

Abstract: The present invention relates to a self-bonding electrical steel sheet and a laminate comprising same, the self-bonding electrical steel sheet comprising an electrical steel sheet and a self-bonding layer positioned on the electrical steel sheet, wherein the amount of inorganic material in the self-bonding layer is 5-35 wt % and the tensile/shear strength of the laminate is 7.5-20 N/mm2.

Abstract: It is related to a positive electrode active material for lithium secondary battery, comprising: a compound represented by Chemical Formula 1, wherein a molar content of lithium present in the structure of the positive electrode active material, measured through neutron diffraction analysis, is 1.01 to 1.15 for 1 mole of the positive electrode active material, a method of preparing it, and a lithium secondary battery including the same. Li1+a(NibM11-b)1-aO2??[Chemical Formula 1] In the Chemical Formula 1, 0<a<0.2, 0.8<b<1, M1 is at least one element selected from Co, Mn, Al, Mg, Ca, Ti, V, Cr, Zr, Nb, Mo, and W.

Abstract: Disclosed are a stainless steel for a fuel cell separator and a method of manufacturing the same. The stainless steel has a low contact resistance as a material for a fuel cell separator and surface roughness parameters that may represent a surface shape of the stainless steel are defined and provided. Specifically, the present disclosure provides a stainless steel for a fuel cell separator with excellent contact resistance and a method of manufacturing the same. The stainless steel includes, in percent by weight (wt %), more than 0 but not more than 0.02% of C, more than 0 but not more than 0.02% of N, more than 0 but not more than 0.4% of Si, more than 0 but not more than 0.3% of Mn, more than 0 but not more than 0.04% of P, more than 0 but not more than 0.02% of S, 15 to 34% of Cr, more than 0 but not more than 1% of Cu, more than 0 but not more than 0.4% of Ni, more than 0 or not more than 0.

Abstract: The present disclosure relates to: a plated steel sheet which is for hot forming, has excellent hydrogen embrittlement resistance, and includes an Al-based plating layer formed on the surface of a base steel sheet, wherein the average Ni content in the Al-based plating layer is 0.05 to 0.35 wt %; and a method for manufacturing same.

Abstract: Disclosed is an austenitic stainless steel with improved corrosion resistance and machinability. The austenitic stainless steel with improved corrosion resistance and machinability may comprise, in percent by weight (wt %), 0.05% or less of C (excluding 0), 2% or less of Si (excluding 0), 2% or less of Mn (excluding 0), 0.01% or less of S, 16 to 22% of Cr, 9 to 15% of Ni, 3% or less of Mo (excluding 0), 0.15 to 0.25% of N, 0.004 to 0.06% of B, and the remainder being Fe and inevitable impurities.

Abstract: The present invention relates to a non-grain-oriented electrical steel sheet which is excellent in high-frequency iron loss, and a manufacturing method thereof. A non-grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 2.5 to 3.8 wt % of Si, 0.5 to 2.5 wt % of Al, 0.2 to 4.5 wt % of Mn, 0.0005 to 0.02 wt % of As, 0.0005 to 0.01 wt % of Bi, the balance Fe, and inevitable impurities, and satisfies the following [Equation 1]. 0.3?[surface fine crystal grain diameter]×[fine grain formation thickness]×([As]/[Bi])?5.0??[Equation 1] In Equation 1, [surface fine crystal grain diameter] means an average particle diameter (?m) of fine crystal grains in an electrode surface layer of an electrical steel sheet, [fine grain formation thickness] means a thickness (mm) of an electrode surface layer in which fine crystal grains are formed, and [As] and [Bi] mean a composition (wt %) of As and a composition (wt %) of Bi, respectively.

Abstract: One aspect of the present invention relates to a plated steel sheet for hot press forming, having an excellent impact property.

Abstract: An aspect of the present invention relates to a cold-rolled steel plate for hot forming, which is excellent in corrosion-resistance and spot-weldability, contains, by weight %, C: 0.1-0.4%, Si: 0.5-2.0%, Mn: 0.01-4.0%, Al: 0.001-0.4%, P: 0.001-0.05%, S: 0.0001-0.02%, Cr: 0.5% to less than 3.0%, N: 0.001-0.02%, and a balance of Fe and inevitable impurities, satisfying formula (1) below, and includes an Si amorphous oxidation layer continuously or discontinuously formed at a thickness of 1 nm-100 nm on the surface thereof. Formula (1): 1.4? 0.4*Cr+Si?3.2 (wherein element symbols denote measurements of respective element contents by weight %).

Abstract: The present invention relates to an electrical steel sheet and a laminate thereof, and provided is an electrical steel sheet including: an electrical steel sheet, and a polyurethane coating layer positioned on the electrical steel shoot, in which the rebound clastic modulus of the polyurethane coating layer is 5% to 30%.

Abstract: One implementation of the present disclosure relates to a bonding composition for an electrical steel sheet, comprising an adhesive resin and a bonding additive, wherein the adhesive resin is polyurethane formed by reacting a polyol and a monomer represented by a specific chemical formula.

Abstract: A manufacturing method of a grain-oriented electrical steel sheet according to an embodiment of the present invention includes: manufacturing a cold-rolled sheet; forming a groove in the cold-rolled sheet; removing an Fe—O oxide formed on a surface of the cold-rolled sheet; primary recrystallization annealing the cold-rolled sheet; and applying an annealing separating agent to the primary recrystallized cold-rolled sheet, and secondary recrystallization annealing it, wherein a close contacting property coefficient calculated by Formula 1 below is 0.016 to 1.13. close contacting property coefficient (Sad)=(0.8×R)/Hhill-up??[Formula 1] (In Formula 1, R represents the average roughness (?m) of the surface of the cold-rolled sheet after the removing of the oxide, and Hhill-up represents the average height (?m) of the hill-up present on the surface of the cold-rolled sheet after the removing of the oxide.).

Abstract: A device for manufacturing molten iron is provided. The device for manufacturing the molten iron includes a multi-stage fluidized reduction furnace for reducing a powdered iron ore including hematite and limonite, a melting gas furnace connected to the fluidized reduction furnace through an ore conduit and a gas conduit, a fluidized bed oxidation furnace for oxidizing magnetite to be converted into hematite through steam provided from the fluidized reduction furnace, and a hydrogen processing unit for processing hydrogen generated by the oxidation reaction of magnetite in the fluidized bed oxidation furnace.

Abstract: An apparatus for calcining a secondary battery cathode material includes: a calcination furnace including an inner space that includes a temperature rising space, a temperature maintaining space, and a cooling space, which sequentially communicate; a plurality of rollers for transferring a sagger, in which a cathode material is accommodated, from the temperature rising space to the cooling space via the temperature maintaining space; a plurality of heaters arranged along the inner space; a plurality of gas feeding parts for feeding gas to the inner space; and a plurality of exhaust parts for exhausting gas from the inner space, wherein the cross-sectional area of the temperature maintaining space is smaller than the cross-sectional area of the temperature rising space and the cross-sectional area of the cooling space.

Abstract: Provided are plated steel sheets for hot press forming, hot press formed parts, and manufacturing methods thereof, the plated steel sheets comprising: a base steel sheet comprising, in weight %, C: 0.07 to 0.5%, Si: 0.05 to 1%, Mn: 0.5 to 5%, P: 0.001 to 0.015%, S: 0.0001 to 0.02%, Al: 0.01 to 0.1%, Cr: 0.01 to 1%, N: 0.001 to 0.02%, Ti: 0.1% or less, B: 0.01% or less, Sn: 0.01 to 0.1%, and a balance of Fe and inevitable impurities; an aluminum or aluminum alloy plating layer disposed on at least one surface of the base steel sheet; and an Sn-enriched layer provided between the base steel sheet and the plating layer, wherein the Sn-enriched layer satisfies a specific relationship.

Abstract: The present invention pertains to a hot press forming member having excellent resistance to hydrogen embrittlement, and a method for manufacturing same. An aspect of the present invention provides a hot press forming member having excellent resistance to hydrogen embrittlement, the hot press forming member comprising a base steel plate and an alloy-plated layer formed on the surface of the base steel plate, wherein the alloy-plated layer contains pores such that pores having a size of 5 ?m or less constitute 3-30% of the surface area of the alloy-plated layer as viewed in a cross-section taken in the thickness direction of the member.