11results about How to "Improve dynamic conditions" patented technology

The invention discloses a high-performance MXene modified oxide electrolysis water electrode and application. A high-entropy oxide electrode loaded on a two-dimensional MXene material is prepared through a solvothermal method and annealing. Wherein the oxide contains five transition metals, namely Fe, Co, Ni, Cu and Mn, exists on the surface of the MXene material in the form of nanoparticles, and is connected through Van der Waals' force. The electrode shows good electrochemical activity and stability in alkaline and alkaline saline water media at the same time.

The invention discloses a method for preparing a Prussian blue compound through a lateral growth mechanism, and belongs to the technical field of material preparation. On the premise of not changing the overall frame structure of the existing Prussian blue, the low-potential Prussian blue compound FeR [Fe (CN) 6] with different nickel substitution amounts is obtained by adjusting the types and contents of transition metal elements and substituting atoms bridged with cyanide ions. According to the present invention, by using the anisotropy of the compound, the formation of the cubic phase crystal structure through the lateral growth mechanism is clarified from the atomic level, the preparation of the Prussian blue compound can be completed within a short time through the thermodynamic and dynamic condition setting, and the method has characteristics of no toxicity, no harm, no excess impurity generation, and increase of the synthesis yield;

The invention discloses a silicon nitride crystal based on a physical vapor transport method and a preparation method thereof, and the preparation method comprises the following steps: laying silicon nitride powder as a raw material at the bottom of a graphite crucible, fixing a seed crystal on a top cover of the crucible, placing the device in single crystal growth equipment, vacuumizing, heating to 1000-1300 DEG C, filling nitrogen to 800-1000 mbar, and preserving heat for 1-3 hours, the method comprises the following steps of: heating to the temperature of between 1,600 and 2,000 DEG C, inhibiting the decomposition of silicon nitride, continuously heating to the temperature of between 1,600 and 2,000 DEG C, adjusting the air pressure in equipment to 100 to 300 mbar, and promoting the silicon nitride to be decomposed into silicon steam and nitrogen. And controlling the temperature of a seed crystal area to be 1500-1700 DEG C and the axial temperature gradient to be 10-50 DEG C / cm, so that Si and N substances in a gas phase are crystallized on the surface of the seed crystal to generate a silicon nitride crystal. And after the crystal grows, filling inert gas and slowly cooling to room temperature to finally prepare the complete silicon nitride crystal. The preparation method disclosed by the invention is accurate in process and high in crystal quality, and the prepared silicon nitride crystal has the particle size of more than 500 microns and the purity of more than 5N, and is suitable for the field of application of high-end materials.

The invention relates to a smelting method of an aluminum-free high-temperature alloy, which relates to the technical field of alloy materials, and is characterized in that the contents of oxygen, nitrogen and sulfur elements in a high-temperature alloy melt are gradually reduced by adding different composite deoxidizing and sulfur agents for three times in the smelting process; through two times of refining, melt quenching and tempering treatment and high-temperature purification treatment, removal of oxygen, nitrogen and sulfur elements in the high-temperature alloy melt is promoted, the content of harmful impurities is effectively reduced, segregation of alloy elements is reduced, and the purity and performance of the high-temperature alloy are improved.

This invention discloses a method for controlling carbon increase in molten steel based on slag system modification, comprising the following steps: S1, smelting endpoint control: controlling the carbon content, phosphorus and sulfur content, and tapping temperature of molten steel at the endpoint of converter or electric furnace smelting; S2, tapping alloying and initial carbon increase: adding a multi-element nitride alloy and a first carbon increaser to the ladle during tapping; S3, argon blowing and stirring: performing a first stage of high-flow-rate argon blowing and stirring; S4, argon blowing station fine-tuning: transporting molten steel to the argon blowing station for sampling and analysis, and supplementing with a second carbon increaser; S5, composition homogenization and soft blowing: sequentially performing a second stage of medium-flow-rate argon blowing and stirring, and a third stage of low-flow-rate soft blowing; wherein the mass percentage of manganese in the multi-element nitride alloy is ≥5%. The advantage of this invention is that by combining optimized alloy composition, segmented carbon increase, and gradient stirring, it achieves precise control of a narrow composition window in molten steel.

The invention relates to the technical field of steel smelting, in particular to a process for improving the blast furnace vanadium recovery rate. Comprising the following steps that a, vanadium-titanium pellets and sintered ore are selected; b, the vanadium-titanium pellets and the sintered ore are fed into a blast furnace to be smelted; c, in the blast furnace smelting process, adjusting the alkalinity of blast furnace slag, the magnesium-aluminum ratio and the physical heat and chemical heat of molten iron; and d, the molten iron with the high vanadium content is separated out, and follow-up treatment is conducted to extract a vanadium product. According to the process, the vanadium recovery rate of the blast furnace is remarkably increased by accurately controlling the vanadium input amount of the raw material entering the furnace and key parameters such as physical heat and chemical heat of molten iron. The process not only improves the reduction thermodynamic and dynamic conditions of vanadium, but also reduces the blast furnace slag amount and the loss of vanadium in the blast furnace slag, thereby greatly improving the recovery rate of vanadium.

The invention belongs to the field of ferrous metallurgy, and particularly relates to vanadium titano-magnetite iron coke as well as a preparation method and application thereof. The vanadium titano-magnetite ferrocoke provided by the invention is prepared from a mixture of vanadium titano-magnetite powder and pulverized coal through hot press molding and anaerobic carbonization. The vanadium titano-magnetite ferrocoke provided by the invention can be positioned between a slag layer and a molten iron layer when being applied to an electric furnace deep reduction process, so that energy conservation and emission reduction are facilitated, the deep reduction time is shortened, and the carbon content and the vanadium recovery rate of deeply reduced molten iron are improved.

The invention discloses a method for treating steel slag by utilizing an ironmaking system, which comprises the following steps: S1, placing the steel slag above a blast furnace tapping channel, and preheating the steel slag by utilizing waste heat; s2, 20-30 minutes after the slag iron is discharged from the blast furnace, the preheated steel slag is uniformly added into liquid slag iron generated in the process of discharging the slag iron from the blast furnace, and molten mixed slag is formed in the main iron runner section; in the step S2, the steel slag adding position is located in a main iron runner section 2-4 m away from a blast furnace taphole. The method for treating the steel slag by using the ironmaking system can simultaneously solve the problems of low stability and low gelation activity of the steel slag, does not add new procedures, is simple in process and low in cost, and opens up a new way for resource utilization of the steel slag.

The utility model relates to a vertical cooling furnace with uniform material distribution, rectification, material loosening and uniform air distribution functions. The vertical cooling furnace comprises a material distribution unit, a furnace chamber, a material loosening unit, a rectification unit, a forced heat exchange unit, an air distribution unit and a material discharge unit, the utility model aims to provide a vertical cooling furnace with functions of rectifying, loosening materials and uniformly distributing air so as to break through the existing technical bottlenecks as follows: 1) the segregation distribution of the materials in the vertical cooling furnace is serious; and 2) the flow integrity of materials in the vertical cooling furnace is poor. And 3) the materials in the vertical cooling furnace are stacked too compactly. And 4) the distribution uniformity of cold air in the vertical cooling furnace is poor. The vertical cooling device can simultaneously have the functions of changing material segregation in the vertical cooling device, promoting the materials to flow in a whole flow mode, reducing the material stacking compaction degree, evenly distributing air and the like, and cooperative operation of material flow and energy flow is achieved in the gas-solid heat exchange process.

This invention provides a catalyst recovery reaction system based on ultrafine catalysts. The catalyst recovery reaction system includes a reaction tower and a nano-micro catalyst separator connected in sequence. The reaction tower has a two-stage structure, comprising an upper coarse-diameter section and a lower fine-diameter section. An intensifier unit is installed at the bottom of the fine-diameter section, and multiple layers of grids are installed within the coarse-diameter section. This invention significantly improves catalytic reaction efficiency and catalyst recovery rate through the synergistic effect of multiple layers of grids, the intensifier unit, and high-efficiency separation technology. Simultaneously, the two-stage structure of the reaction tower, combining a catalyst-repellent coating and a dynamic anti-fouling ultrafiltration membrane, effectively prevents catalyst deposition and membrane fouling, ensuring efficient and stable operation of the reaction process.

The invention relates to the technical field of quartz product production, and discloses quartz weight plasma processing equipment which comprises a melting furnace, a supporting plate and a controller, a furnace cover is installed at the top end of the melting furnace, supporting legs are installed at the bottom end of the melting furnace, the bottom end of the melting furnace is communicated with a slag discharging pipe, and an air suction pipe is communicated with one side, close to the top end, of the melting furnace. According to the device, a quartz weight can rotate while moving up and down in a reciprocating mode in the high-temperature heating and melting process, an upper plasma torch evenly scans and heats the outer surface of the quartz weight from top to bottom and then from bottom to top, heat is rapidly guided in from multiple directions, and therefore the quartz weight can be heated in a high-temperature mode, and the quality of the quartz weight is improved. The thermal stress is greatly reduced, cracking is avoided, the centrifugal force generated during rotation of the quartz weight can effectively discharge bubbles generated during heating of the quartz weight, the optimal dynamic condition is created for bubble discharge, and the bubble content of a finished product is remarkably reduced.