14results about How to "High carbon content" patented technology

This invention provides a road petroleum asphalt-based hard-soft carbon composite material, the raw materials of which include road petroleum asphalt, light component small molecule stabilizer, heavy component small molecule oxidant, activator, and solvent; and the ratio of road petroleum asphalt:solvent:light component small molecule stabilizer:heavy component small molecule oxidant:activator is 1:15-25:0.05-0.2:0.05-0.2:2-5, calculated in g / mL / g / g / g. Furthermore, this invention also provides a method for preparing the aforementioned hard-soft carbon composite material, which includes the following steps: crosslinking treatment of the light component, crosslinking treatment of the heavy component, activation, and carbonization. This invention solves the problem in the prior art where the high price or low carbon yield of hard carbon precursors, high cost of oxidants, or complex overall formulations lead to high costs for the prepared asphalt-based sodium-ion battery anode carbon materials. The hard-soft carbon composite material of this invention not only has a lower cost but also combines the advantages of both hard and soft carbon, exhibiting high sodium storage capacity, high reversible specific capacity, high initial charge-discharge efficiency, and good cycle performance.

The invention relates to a preparation process of high-strength, high-wear-resistance and high-toughness hot work die steel for an extrusion die, which is characterized in that on the basis of common hot work die steel H13, component design is carried out by adopting a component design concept of high C, low Si, high Mo and low V, and special smelting, forging and heat treatment processes are added. The prepared product has excellent purity, structure uniformity and mechanical property, and a mold made of the material can better meet the requirements of modern industrial production for high-end molds. The process route comprises the steps of electric furnace smelting, ladle refining furnace refining, circulating vacuum refining furnace refining, electrode blank continuous casting, electrode blank annealing, electroslag remelting, forging, pretreatment after forging and solid solution and spheroidizing treatment. The invention further relates to the high-strength, high-wear-resistance and high-toughness hot work die steel for the extrusion die.

This invention belongs to the technical field of bactericide residue analysis and determination in plant-derived foods, specifically relating to a method for detecting isobutylethoxyquinoline and its metabolites in plant-derived foods. The method includes extraction with acetonitrile under citrate conditions, followed by purification with C18 (25 mg), PAX (25 mg), and XFM64 (nitrogen-doped multi-walled carbon nanotubes, 10 mg) adsorbents. Chromatographic separation is performed using a C18 column with methanol-2 mmol / L ammonium acetate (containing 0.1% formic acid) as the mobile phase, isocratic elution at a flow rate of 0.40 mL / min, electrospray ionization (ESI+), and detection in multiple reaction monitoring (MRM) mode. This invention is simple to operate, has high pretreatment efficiency, and its precision and recovery rate meet the regulatory residue limit monitoring requirements. It is suitable for the simultaneous determination of isobutylethoxyquinoline and its metabolites in plant-derived foods.

The application discloses a ferrite-pearlite steel structure heat treatment method, and relates to the technical field of metal material heat treatment, and aims at solving the technical problem that the ferrite-pearlite steel processed by the existing heat treatment process has high strength but low toughness. The ferrite-pearlite steel structure heat treatment method comprises the following steps: heating and elevating a ferrite-pearlite steel workpiece to a temperature 30-60 DEG C higher than Ac3, and performing first heat preservation treatment under the temperature condition; the time of the first heat preservation treatment is at least the time required for the temperature distribution of the steel workpiece to be uniform; after the first heat preservation treatment, the steel workpiece is cooled to a temperature 0-60 DEG C higher than Ac1, second heat preservation treatment is performed under the temperature condition, and then the steel workpiece is cooled to normal temperature, the heat treatment is completed, and the time of the second heat preservation treatment is at least the time required for the temperature distribution of the steel workpiece to be uniform. The technical scheme provided by the application is used for heat treatment of the ferrite-pearlite steel workpiece, so as to improve the toughness of the steel workpiece.

The invention discloses a synthesis process of aluminum hypophosphite synergistic system flame-retardant polyamide, which belongs to the technical field of polyamide materials, and comprises the following steps: firstly, modifying the surface of an aluminum hypophosphite material by a mechanical grinding method; meanwhile, an aluminate coupling agent and a rare earth aluminate coupling agent are respectively matched to react to generate a reticular cross-linked macromolecular structure, and a micromolecular substance triphenyl phosphate is used as a synergist to improve the compatibility of aluminum hypophosphite in a PA6 composite material system; and then, taking the modified aluminum hypophosphite prepared in the previous step as a flame retardant, and dissolving epoxy silicon resin in methylbenzene to serve as a synergistic component, so that the initial decomposition temperature and the thermal degradation rate of the polyamide composite flame-retardant material are reduced, and the carbon residue amount of the polyamide composite material is further increased. According to the synthesis process of the aluminum hypophosphite synergistic system flame-retardant polyamide, the technical problems of large addition amount and poor compatibility with materials of an inorganic flame retardant in the prior art are solved.

This invention relates to the field of comprehensive resource utilization, specifically to an apparatus and method for increasing the amount of graphite precipitation in molten iron. The apparatus includes a blast furnace molten iron trough, with multiple injection pipes at the bottom. The other end of each injection pipe is connected to a pulverized coal feeding system via a conveying pipe. The method involves injecting pulverized coal into the molten iron trough through the injection pipes to increase the carbon content of the molten iron. As the molten iron cools, it becomes supersaturated with carbon, leading to graphite precipitation. This invention injects pulverized coal into the molten iron trough, utilizing the higher temperature of the molten iron and the stirring kinetic energy generated by the iron flow to promote rapid and efficient dissolution of the pulverized coal, increasing the carbon content. Furthermore, by employing a suitable blast furnace molten iron cooling rate, it significantly improves the subsequent graphite precipitation ratio under the same conditions. The carbon injected into the molten iron in the form of pulverized coal ultimately precipitates as graphite, greatly enhancing the added value of iron and steel metallurgy and resulting in significant economic benefits. It also has a significant impact on the development of emerging graphite resources.

This invention belongs to the field of battery manufacturing technology, specifically relating to a wood-based hard carbon anode material, its preparation method, and its application in sodium-ion batteries. Addressing the high cost of hard carbon material precursors, this invention proposes a method for preparing a wood-based hard carbon anode material, comprising: using natural wood particles as a carbon source precursor, first subjecting them to hydrothermal treatment in a strong acid solution containing hydrogen peroxide, followed by high-temperature carbonization to obtain the wood-based hard carbon anode material. This invention uses natural wood as a raw material, eliminating the need for pore-blocking agents, and thus forming a wood-based hard carbon anode material with a closed-cell structure, providing a better environment for sodium ion insertion and extraction.

The application discloses a kind of aluminum alloy for selective laser melting forming and preparation method thereof, belong to aluminum alloy material and additive manufacturing technical field.The aluminum alloy of the present application comprises by mass percentage: Mg 3.8~5.2%, Zn 3.8~5.2%, Cu 0.5~1.0%, Ti 0.4~1.6%, C 0.1~0.4%, the balance is Al.Its preparation method includes: using Al-5Ti-1C intermediate alloy and other raw materials are melted into ingot, is atomized by vacuum, then it is printed by selective laser melting, finally it is solid solution and aging treatment.The application is introduced by Al-5Ti-1C intermediate alloy by component control and by submicron level TiC particle cooperates grain refinement, inhibits thermal crack, the yield strength of obtained alloy is greater than or equal to 480MPa, tensile strength is greater than or equal to 550MPa, elongation is greater than or equal to 10%, low in cost, suitable for additive manufacturing.

The invention relates to a conductive agent and a preparation method thereof, a negative pole piece and a lithium ion battery. The method comprises the following steps: S1, carrying out ball milling treatment on the gasified ash residues to obtain a first product; s2, carrying out surface deacidification treatment on the first product to obtain a second product; and S3, carrying out roasting treatment on the second product. The conductive agent provided by the invention is low in cost, high in carbon content, strong in conductivity and large in specific surface area, and can be used as a good conductive agent material. The conductive agent material can be used in combination with a plurality of existing negative electrode active materials, and is good in compatibility.

The invention discloses a method for improving the quality of a chromium carbide product, which comprises the following steps: uniformly mixing a chromium carbide semi-finished product and an additive through a ball mill, adding the mixture and an adhesive into a three-dimensional mixer, uniformly mixing, pressing into honeycomb briquette-shaped blocks, drying, and sintering in a vacuum furnace to generate chromium carbide. The liquid nitrogen pulverizer, the ball mill and the three-dimensional mixer are used for treating materials, so that the contact area of the materials is increased, the mixing efficiency is improved, and the reaction is more facilitated; according to the invention, materials are pressed into honeycomb briquette-shaped blocks, so that gas generated in the reaction can be efficiently led out; in addition, vacuum sintering is adopted, the reaction temperature is reduced, parameters are easy to control, the content of impurity elements is low, a chromium carbide semi-finished product smelted by an electric arc furnace is fully and comprehensively utilized and converted into chromium carbide with wider application and larger additional value, the raw material cost and the process cost are reduced, the process is simple, the parameters are easy to control, and the method is environmentally friendly and suitable for industrial production.

The utility model discloses dry distillation carbonization equipment which comprises a carbonization furnace, the carbonization furnace comprises a furnace body and a furnace pipe which is detachably arranged in the furnace body; the furnace body is hermetically connected with the furnace pipe; a sealing cover is arranged at the top of the furnace; a plurality of exhaust holes are formed in the bottom of the furnace pipe; a smoke exhaust pipeline is arranged at the upper part outside the furnace body; a furnace door is arranged on the lower portion outside the furnace body. According to the utility model, the exhaust holes are formed in the bottom of the furnace pipe, so that wood vinegar, wood tar and combustible gas generated during carbonization of charcoal raw materials are discharged through the exhaust holes in the bottom of the furnace pipe and are directly contacted with open fire in the furnace body to be fully combusted, and the problem of safety accidents caused by pipeline blockage of the carbonization furnace can be effectively solved; and the use efficiency of equipment and the charcoal production efficiency are improved, and meanwhile, the retention time of high-temperature gas in the furnace pipe can be prolonged, so that the heat utilization rate and the heating uniformity can be improved, the quality consistency of charcoal can be ensured, and the charcoal content and the charcoal yield are improved.

This invention relates to the field of petrochemical technology, specifically to a method and apparatus for increasing the production of high-quality, low-sulfur petroleum coke. The method includes: subjecting feedstock oil and catalyst to hydrodesulfurization pretreatment; heat-treating the resulting liquid-solid component I; separating and extracting the resulting liquid-solid component II; and coking the obtained coking feedstock to obtain low-sulfur petroleum coke with a sulfur content ≤2 wt%. The catalyst is selected from at least one complex formed by the coordination bonding of an active metal and an organic ligand. The method provided by this invention not only achieves efficient conversion of feedstock oil and increases the production of high-quality petroleum coke, but also broadens the feedstock sources for low-sulfur petroleum coke, realizing the economic added value of feedstock oil, especially high-sulfur, low-quality feedstock oil.

The invention discloses a purification system and a microcrystalline graphite purification method. The microcrystalline graphite purification method comprises the following steps: contacting a microcrystalline graphite raw material with an oxygen-containing gas at a first temperature to at least convert at least a part of first impurities in the microcrystalline graphite raw material into a first volatile product and at least activate at least a part of second impurities in the microcrystalline graphite raw material to obtain pretreated microcrystalline graphite; and contacting the pretreated microcrystalline graphite with a halogen-containing gas at a second temperature so as to at least convert at least part of the activated second impurities in the pretreated microcrystalline graphite into a second volatile product, thereby obtaining purified microcrystalline graphite. The purification process is simple, easy to operate, low in energy consumption, safe and environment-friendly, the carbon content of the microcrystalline graphite can be remarkably improved, the crystallinity is remarkably improved, the impurity content is greatly reduced, and the application requirement of a battery negative electrode material is completely met.

The invention relates to a preparation method of an in-situ carbon-doped cobalt-based catalyst, which comprises the following steps: mixing a metal source and an organic ligand to obtain a solid mixture, dissolving the solid mixture in a mixed solvent to obtain a mixed solution, the mixed solvent is composed of deionized water, ethanol and N, N-dimethylformamide; preparing an organic metal framework precursor from the mixed solution at 70-90 DEG C through a hydrothermal method; and calcining the organic metal framework precursor at 800-1000 DEG C, and naturally cooling to obtain the in-situ carbon-doped cobalt-based catalyst. The invention further relates to the in-situ carbon-doped cobalt-based catalyst and application thereof. The preparation method is simple, organic matter introduced by the organic ligand is calcined into carbon, and the carbon is doped into the cobalt-based material in situ, so that the problem of poor conductivity is solved.