This invention relates to a method of carbothermic process of magnesium production and co-production of calcium carbide, which is particularly suitable for carbothermic process of magnesium production with a mixture of magnesium oxide and calcium oxide as a raw material and carbon as a reducing agent. A mixed powder containing magnesium oxide, calcium oxide and a carbon reducing agent is prepared. The mixed powder is processed into a pelletized furnace feed material, which is placed into a reactor equipped with a heat source. With an absolute pressure P in the reactor being set within the range of 1000 Pa≤P≤atmospheric pressure or to a slightly positive pressure and a reaction temperature T within the range of 11 lg.sup.2P+71 lgP+1210° C.<T<98 lg.sup.2P-129 lgP+1300° C., a smelting reaction is run. Liquid magnesium is obtained through condensation by a condenser connected to the reactor, and after the smelting reaction has finished, calcium carbide is obtained within the reactor. With this method, a potential safety hazard in that a magnesium vapor produced during carbothermic magnesium production, when co-cooled with a CO gas, tends to give rise to a magnesium powder and cause an explosion can be completely avoided, and magnesium production cost can be significantly reduced. This method has a good prospect of industrial application.

A method for synthesizing a zirconium complex includes setting a temperature of a mixed solution at a certain temperature or more to synthesize a zirconium complex, the mixed solution being obtained by mixing: an organic solvent containing an organic substance having water miscibility; a chelating agent solution in which a chelating agent is dissolved; and zirconium dissolved in an acidic solution.

A method for separating of at least two transition metals, the method comprising: injecting a feed solution into a chromatography column comprising a chromatographic support media, the feed solution comprising at least two transition metals; eluting the feed from the column in an elution cycle by flowing an eluent through the column, wherein a concentration of the eluent is reduced during the elution cycle prior to elution of at least one of the transition metals.

The present disclosure relates to a wear resistant steel material that is not cracked even after being cut using gas, etc., and a method of manufacturing the wear resistant steel material.

An embodiment of the present invention provides a non-oriented electrical steel sheet including. in wt%: Si: 2.5 to 4.0 %, Mn: 0.1 to 1.0 %, Al: 0.5 to 1.5 %, P: 0.002 to 0.015 %, and As: 0.002 to 0.01 %, and the balance of Fe and inevitable impurities, and satisfying Formula 1 and Formula 2.

[00001]$0.005\le \left(\left[\text{P}\right]+\left[\text{As}\right]\right)\le 0.015$

(In Formula 1, [P] and [As] represent a content (wt%) of P and As, respectively.)

[00002]$\left[\text{STD}\right]\le 0.7\times \left[\text{GS}\right]$

([GS] is an average grain size (.Math.m) measured when 10,000 or more grains having a grain size of 5 to 500 .Math.m are observed on a surface of the steel sheet, and STD is a standard deviation (.Math.m) at that time.)

A mobile phase including a lithium salt flows through a stationary phase including an oxygenated metal compound with affinity to the lithium salt through a Lewis acid-Lewis base interaction so that the oxygenated metal compound captures the lithium salt through the Lewis acid-Lewis base interaction. An eluent flows through the stationary phase to release the lithium salt captured by the oxygenated metal compound into the eluent. The eluent includes a Lewis base or a Lewis acid that disrupts the Lewis acid-Lewis base interaction between the lithium salt and the oxygenated metal compound. The eluent including the released lithium salt is collected after the eluent flows through the stationary phase.

An automated laser shock peening (LSP) process equipment system for an aero-engine blade, including: a base, where a loading and unloading manipulator, working manipulator, reverse engineering mechanism, coating apparatus, and LSP apparatus are disposed; the loading and unloading manipulator is configured to grab a blade and place it on the reverse engineering mechanism, which includes a reverse engineering instrument and controller that are connected, the instrument can generate three-dimensional digital data of the blade, and the controller generates a working path for coating and LSP according to the data, and transmits the path to the working manipulator; the loading and unloading manipulator places the blade into the pallet, and the working manipulator drives the blade to a corresponding position according to the path. Independent locating and clamping systems of the pallet and the blade and the pallet and the manipulator fix a position of the blade relative to the manipulator.

There is provided a method for collecting and reusing an active material from positive electrode scrap. The method of reusing a positive electrode active material of the present disclosure includes (a-1) immersing a positive electrode scrap comprising an active material layer on a current collector into a basic solution to separate the active material layer from the current collector, (a-2) thermally treating the active material layer in air for thermal decomposition of a binder and a conductive material in the active material layer, and collecting an active material in the active material layer, (b) washing the active material collected from the step (a-2) with a lithium compound solution which is basic in an aqueous solution and drying, and (c) annealing the active material washed from the step (b) with a lithium precursor to obtain a reusable active material.

A treatment process for crystallizing a metal sulfate involving pre-treating a feedstock comprising calcium, magnesium, and/or lithium impurities, the pre-treating involving pre-leaching the feedstock in the presence of a lixiviant, selectively extracting a first portion of any of the impurities from the feedstock, and forming a leached solution comprising an uncrystallized metal sulfate and any remaining impurities; and/or refining the leached solution and removing a second portion of any of the remaining impurities; and crystallizing the uncrystallized metal sulfate from the leached solution to form a crystallized metal sulfate. So processed, the crystallized metal sulfate may be battery-grade or electroplating-grade.

A storage and drainage mechanism includes a storage vessel, a drainage section, and a temperature controller. The storage vessel stores a stored material containing metal of plasma raw material at a temperature at which the stored material is in a liquid-phase state. The drainage section includes a drain pipe including an inlet through which the stored material flows in, and an outlet through which the stored material drains away, the drain pipe being communicated with an interior of the storage vessel, and a temperature control element that adjusts a temperature of the drain pipe. The temperature controller controls the temperature control element to switch the temperature of the drain pipe in a manner that the stored material in the drain pipe is in either a liquid-phase state or a solid-phase state.