Abstract: Disclosed is a method for manufacturing a 5Ni steel plate with a low remanence and an excellent surface quality to be used in a ship. The process flow thereof comprises: converter smelting->LF refining->RH high vacuum degassing->treatment with Ca->continuous casting->a slow cooling treatment to the slab->cleaning the surface of the slab->heating->rolling->quenching twice->tempering. The constituents comprise a low content of carbon, a low content of silicon, and 5% Ni, with V and Nb being added thereto, which improves the hardenability, improves the toughness at a low temperature, and improves the starting temperature of non-recrystallization of austenite. The steel plate can be subjected to high-temperature rolling and high-temperature quenching so as to significantly improve the shape of the plate, thus being applicable to the production of thin products.

Abstract: A ternary precursor of a lithium ion battery as well as a preparation method and preparation device thereof are provided. A chemical general formula of the ternary precursor is NixCoyMnz(OH)2, 0.5?x?0.9, 0.05?y?0.3, and x+y+z=1. A particle size D50 of a large-particle ternary precursor is 10.0-16.0 ?m, a particle size D50 of a small-particle ternary precursor is 3.0-6.0 ?m, and a span is 0.2-0.8. A nucleation and growth process of a crystal is regulated through a staged EDCF, a crystal particle size meeting specific requirements and compact particles without a cracking phenomenon can be obtained. A disc, inclined blades and an arc surface are combined, and an arc-shaped curved surface can effectively reduce a turbulence energy dissipation rate of a local area.

Abstract: A ternary precursor of a lithium ion battery as well as a preparation method and preparation device thereof are provided. A chemical general formula of the ternary precursor is NixCoyMnz(OH)2, 0.5?x?0.9, 0.05?y?0.3, and x+y+z=1. A particle size D50 of a large-particle ternary precursor is 10.0-16.0 ?m, a particle size D50 of a small-particle ternary precursor is 3.0-6.0 ?m, and a span is 0.2-0.8. A nucleation and growth process of a crystal is regulated through a staged EDCF, a crystal particle size meeting specific requirements and compact particles without a cracking phenomenon can be obtained. A disc, inclined blades and an arc surface are combined, and an arc-shaped curved surface can effectively reduce a turbulence energy dissipation rate of a local area.

Abstract: A reagent filling device and a sample analyzer with the reagent filling device. The reagent filling device includes a base, a horizontal rotation component, a vertical lifting component and a cantilever component, wherein, the horizontal rotation component is connected with the base, the vertical lifting component moves in a vertical direction relative to the base, the vertical lifting component drives the cantilever component to move along the vertical direction, the cantilever component is rotatably arranged relative to the vertical lifting component, there are a plurality of cantilever components, the cantilever component includes a cantilever body, a length of the cantilever body of at least one cantilever component is greater than a length of the cantilever body of each of the rest cantilever components, and the cantilever component is configured to add a reagent in a reagent disc to a reaction cup in a reaction disc.