506results about How to "Suppress generation" patented technology

The invention relates to the technical field of secondary batteries, in particular to a conductive composite current collector, a preparation method thereof and a battery. The conductive composite current collector comprises a supporting layer, a metal layer arranged on at least one surface of the supporting layer and a PTC (Positive Temperature Coefficient) bottom coating arranged on the surface, far away from the supporting layer, of the metal layer, the supporting layer comprises a polymer base membrane and conductive fibers dispersed in the polymer base membrane; the PTC undercoat layer includes a conductive polymer and a conductive agent dispersed in the conductive polymer. The conductive composite current collector provided by the invention is high in conductivity and excellent in safety, the probability of thermal runaway of the battery at a high temperature is effectively reduced, and the rate capability and the cycle performance of the battery are improved.

The invention provides a method for preparing high-purity and fine-particle-size lithium sulfide based on carbon thermal reduction. The method comprises the following steps: weighing lithium sulfate monohydrate, an insoluble inorganic carbon source and cysteine in a set proportion to form a raw material mixture; mixing the raw material mixture with water according to a set solid-to-liquid ratio, performing ultrasonic dispersion to obtain homogeneous dispersion liquid, and enabling the dispersion liquid to pass through a nitrogen circulating spray dryer to obtain uniform and dry precursor powder; in a vacuum environment, carrying out segmented calcination to obtain a crude product lithium sulfide; and in a dry and anhydrous environment, washing the crude product lithium sulfide for multiple times by using absolute ethyl alcohol according to a set liquid-solid ratio to obtain an alcoholic solution containing lithium sulfide, and then obtaining lithium sulfide fine powder through a nitrogen circulating spray dryer. The invention solves the problems of side reaction, low purity, large product particles, uncontrollable particle size and the like of lithium sulfide prepared by a carbon thermal reduction method in the prior art.

The invention provides a concrete admixture with sulfate corrosion resistance and rust resistance functions. The concrete admixture is prepared from the following raw materials in parts by weight: 50-65 parts of fly ash, 8-12 parts of barium carbonate, 8-12 parts of barium hydroxide, 8-12 parts of mineral powder, 5-8 parts of modified hydrotalcite or hydrotalcite, 1-3 parts of nano silicon dioxide and 1-3 parts of calcium nitrite. Nano silicon dioxide is adopted as a compact component, the porosity of the material is reduced, the compactness of concrete is improved, sulfate in the environment is inhibited from being transmitted into the concrete, meanwhile, hydrotalcite is modified by polymaleic acid serving as a scale inhibition component, and the scale inhibition effect is improved through the dual effects of high adsorbability and slow release of the scale inhibition component of hydrotalcite. The preparation method has the advantages that generation of ettringite and gypsum in a sulfate radical environment is inhibited, calcium nitrite is added as a corrosion-inhibiting component, a protective film is formed on the surface of a reinforcing steel bar, the corrosion phenomenon of the reinforcing steel bar in a concrete structure is inhibited, and finally, the concrete admixture with sulfate corrosion resistance and corrosion-inhibiting functions is formed through compounding.

The invention belongs to the field of vanadium metallurgy, and particularly relates to a method for preparing metal vanadium through aluminothermy in cooperation with molten salt electrolysis so as to solve the problem that in the prior art, the production cost of the metal vanadium is high due to the fact that high-temperature and high-vacuum refining is used for removing impurity aluminum. The method comprises the following steps: uniformly mixing a vanadium-containing raw material, metal aluminum and an additive according to a weight ratio of 100: (25-35): (4-8), igniting to carry out aluminothermic reduction reaction, and removing upper smelting slag after a reaction product is cooled to obtain primary metal vanadium; and the primary metal vanadium is subjected to molten salt electrolytic refining in the protective gas atmosphere, and refined metal vanadium is obtained. According to the method, high-temperature or high-vacuum refining is not needed, the high-purity metal vanadium can be prepared only through the two-step operation of aluminothermic reduction and molten salt electrolysis, and compared with an existing vanadium preparation process adopting high-temperature and high-vacuum refining, the energy consumption and the production cost are remarkably reduced.

The invention discloses a warm-keeping fabric containing hollow polyester fibers as well as a preparation method and application thereof, and relates to the field of fabrics. When the thermal fabric containing the hollow polyester fibers is prepared, hollow mesoporous nano cerium oxide is selectively protected by molten paraffin and then reacts with chloromethyl trimethoxy silane and isocyanuric acid in sequence, paraffin is dissolved by chloroform, and then N-(3-trimethoxysilylpropyl) pyrrole is grafted to obtain modified hollow mesoporous nano cerium oxide; reacting terephthalic acid, a multifunctional monomer and ethylene glycol to obtain modified polyester particles; the preparation method comprises the following steps: granulating modified polyester, uniformly mixing modified hollow mesoporous nano cerium oxide and polyethylene glycol 10000, performing melt spinning, treating with a pyrrole solution, twisting, spinning and weaving, and treating with a sodium hypochlorite mixed solution to obtain the thermal fabric containing the hollow polyester fibers. The warm-keeping fabric containing the hollow polyester fibers prepared by the invention has excellent warm-keeping, antibacterial, anti-aging, flame-retardant, antistatic and mechanical properties.

The invention relates to the technical field of mulberry processing, in particular to fermented mulberry powder with sleep-aiding and sugar-resisting effects as well as a preparation method and application of the fermented mulberry powder. The preparation method comprises the following steps: adding mulberries into water, and pulping to prepare pulp; adding a compound enzyme into the slurry for enzymolysis to obtain an enzymatic hydrolysate; equally dividing the enzyme solution into two parts, and respectively adding saccharomyces cerevisiae and plant lactobacillus for first-stage fermentation to obtain a first fermentation solution; sterilizing the first fermentation liquor, and adding casei paracasei for second-stage fermentation to obtain second fermentation liquor; and filtering the second fermentation liquor, adding a solid filler into the filtrate, and then sterilizing and drying in sequence to obtain the fermented mulberry powder. Compared with common mulberry powder, the fermented mulberry powder prepared by the preparation method disclosed by the invention has the effects of aiding sleep and resisting sugar, is obvious in aiding sleep, can inhibit generation of AGEs, and has the effect of inhibiting glycosylation.

The invention belongs to the technical field of functional foods and health foods, and particularly relates to an anti-saccharification and anti-aging aronia melanocarpa fruit composition and a preparation method thereof. The composition is prepared from the following raw materials in parts by weight: 150 to 400 parts of aronia melanocarpa fruit fermentation liquor, 10 to 80 parts of lycium ruthenicum, 10 to 80 parts of ginseng, 0.5 to 2.5 parts of grape seed extract, 10 to 70 parts of collagen peptide, 0.5 to 4 parts of sodium hyaluronate, 0.1 to 0.8 part of resveratrol and 0.03 to 0.3 part of yeast extract. The content of type I collagen peptide in the skin is increased, the generation of in-vitro anti-glycation end products is inhibited, and the anti-glycation and anti-aging effects are achieved.

The invention relates to the technical field of metal-based composite materials, and discloses a preparation method of a silicon carbide reinforced aluminum-based composite material for electronic packaging, the method that pre-oxidation is conducted on the surfaces of silicon carbide particles first and then vacuum micro-evaporation titanium plating is conducted is adopted, the wettability with an Al matrix is obviously improved, generation of an interface reaction brittle product Al4C3 is inhibited, and the performance of the silicon carbide reinforced aluminum-based composite material is improved. Defects such as gaps in the composite material are reduced, and the mechanical property of the composite material is improved; the silicon carbide reinforced aluminum-based composite material is prepared by adopting a non-pressure infiltration method, so that the production time is obviously shortened, infiltration can be successful by taking a small amount of time, and the process is stable; the interface phase TiC / Ti5Si3-Al coating not only improves the electrical conductivity and thermal conductivity of the silicon carbide powder, but also enhances the adhesive force of the silicon carbide powder and an aluminum base; al2O3 is gradually adsorbed and deposited on the surface of the material by adopting a micro-arc oxidation process, so that the corrosion resistance of the aluminum silicon carbide composite material is enhanced, and the requirements of a contemporary packaging material on high heat dissipation and corrosion resistance can be met.

The invention relates to a negative active material and a preparation method thereof, a negative pole piece and a lithium ion battery, and belongs to the technical field of electrochemistry. The negative electrode active material comprises a composite core material and a coating material, the composite core material comprises a substrate material and a first material, the substrate material is provided with a plurality of pores, and the first material is arranged on the pore walls of the pores of the substrate material; the coating material coats at least part of the outer surface of the composite core material; wherein the nucleation overpotential of lithium on the first material is smaller than the nucleation overpotential of lithium on the coating material, so that lithium ions are more prone to nucleation and deposition on the first material, and formation of lithium dendrites is reduced; the coating material further protects the inner core material and prevents the inner core material from being in direct contact with the electrolyte, so that the probability of side reaction between the metal lithium and the electrolyte / electrolyte is reduced, and the cycle performance is improved.

The invention provides a lithium metal negative electrode current collector, a preparation method thereof and a lithium metal battery, and the method comprises the following steps: carrying out single-side treatment on carbon cloth in oxygen plasma for 8-12 seconds to obtain gradient activated carbon cloth; the preparation method comprises the following steps: dissolving Zn (NO3) 2 and urotropine in water, and slowly adding ammonia water to obtain a colorless and transparent precursor solution; and transferring the precursor solution into a polytetrafluoroethylene liner, carrying out hydrothermal reaction on the precursor solution and gradient activated carbon cloth, cooling to room temperature, and washing and drying to obtain the lithium metal negative electrode current collector. The three-dimensional carbon cloth current collector with longitudinal zinc oxide gradient distribution is obtained through single-sided oxygen plasma treatment and a one-step hydrothermal method, and meanwhile, lithium is induced to deposit from bottom to top and uniformly grow in a three-dimensional carbon cloth framework with ZnO lithium-loving sites gradient distribution by effectively controlling the concentration distribution of ZnO, so that the formation of lithium dendrites is inhibited; the cycle stability of the electrode is improved, and long cycle stability and high energy density of the lithium battery are realized.

The invention discloses a zirconium-nickel dissimilar metal welding method based on active regulation and control of a temperature field. The zirconium-nickel dissimilar metal welding method comprises the following steps that S1, base metal is cleaned; the butt-joint end faces and the welding surfaces of the zirconium and nickel alloy pipes are polished and cleaned, and clean zirconium and nickel base materials are obtained; s2, a to-be-welded part is assembled; the to-be-welded end face of the clean base metal is assembled in a protective gas cavity of the rotary clamping device; s3, welding is conducted; a laser scanner is adopted for welding at a preset welding position, heat source gradient distribution of base metal at the two ends of a welding seam is controlled by regulating and controlling laser power, welding seam temperature field feedback is established through an infrared temperature sensor, and real-time monitoring and laser power regulating and controlling are conducted; s4, postweld heat treatment; and the laser power is adjusted in real time according to welding seam temperature field feedback so as to adjust and control the welding seam cooling process. According to the method, effective connection of zirconium-nickel indissolvable metal is achieved by controlling the regional welding temperature field, the temperature range for forming brittle compounds is avoided, the uniformity of a molten pool between Zr and Ni materials is ensured, and welding defects such as hot cracks and air holes are reduced.

The invention belongs to the field of biological medicine, and particularly relates to application of an anti-IGF-1R antibody or an antigen binding part thereof in weight loss. The invention provides an application of an anti-IGF-1R antibody or an antigen binding part thereof in weight loss. The anti-IGF-1R antibody or the antigen-binding portion thereof is reduced in weight by at least one of the following mechanisms: (1) inhibiting or blocking the binding between IGF-1R and IGF-1; (2) the activity of IGF-1R is reduced, weakened or neutralized; (3) inhibiting cell proliferation; (4) inhibiting fat synthesis and / or accumulation of cells; and (5) inhibiting collagen synthesis of cells. The anti-IGF-1R antibody or the antigen binding part thereof can significantly inhibit the generation and accumulation of fat and effectively inhibit the formation of collagen, and has a significant effect in the treatment of obesity and weight loss.

The present invention belongs to the field of medical technology related to the extraction and application of natural drug components, discloses a white peony extract for treating hyperuricemia, a preparation method thereof and an application thereof, and provides a preparation method of a white peony extract for treating hyperuricemia, wherein the obtained white peony extract has a good therapeutic effect on a hyperuricemia animal model; mainly inhibiting uric acid production by inhibiting the activity of xanthine oxidase in serum and liver, while downregulating the levels of renal tissue proteins URAT1 and GLUT9, and upregulating the levels of renal tissue proteins OAT1 and OAT3 to reduce uric acid reabsorption and promote uric acid excretion, thereby achieving the purpose of reducing uric acid levels. Furthermore, the white peony extract is synergistically used with the currently commonly used uric acid-lowering drug allopurinol to develop a more effective and safe uric acid-lowering treatment plan.

The invention discloses a sludge low-temperature oxidation treatment system and method. The system comprises a pretreatment unit, a feed lifting mechanism, a low-temperature oxidation furnace, a flue gas purification unit and an automatic control unit. The low-temperature oxidation furnace is divided into a feeding area, a low-temperature oxidation area and an air distribution and slag discharge area from top to bottom, an air distribution plate is provided with air outlets which are uniformly arrayed, the temperature of the low-temperature oxidation area is controlled to be 420-480 DEG C, and generation of dioxin is inhibited from the source. The pretreatment unit is used for mixing sludge, biomass and quartz sand to form a loose breathable material to prevent the sludge from hardening; the method comprises the steps of material mixing, continuous feeding oxidation, temperature closed-loop regulation and control, flue gas purification and ash treatment, high-water-content municipal sludge can be stably treated, the energy consumption is low, the dioxin generation amount is low, flue gas emission reaches the standard, ash can be recycled, and the method is suitable for large-scale municipal sludge harmless treatment.

The invention discloses a method for removing organic matters in water based on an electrochemical coupling ozone system of an LDH-loaded graphite felt cathode, which comprises the following steps: taking MFe-LDH / GF as a cathode, taking a platinum sheet as an anode, taking a reaction solution comprising pollutants and an electrolyte, taking Na2SO4 as the electrolyte, adding the two electrodes into the reaction solution, and filling gaseous ozone into the reaction solution, adjusting the pH value of the reaction liquid to 3-9, and charging current into the two electrodes, so as to construct an electrochemical coupling ozone system to remove pollutants. By utilizing the method, the yield of HOO can be improved, so that the removal of organic pollutants is enhanced.

The invention provides a photo-thermal nanoparticle, a photo-thermal self-driven hydrophobic anti-icing coating and a preparation method and application thereof, and belongs to the technical field of hydrophobic anti-icing materials. The invention provides a preparation method of photo-thermal nano-particles, which comprises the following steps: mixing a nano-material and tetraethoxysilane under an alkaline condition for hydrolysis, and coating the surface of the nano-material with a silicon dioxide shell to obtain coated nano-particles; and mixing the coated nanoparticles with a silane coupling agent, and carrying out a grafting reaction to obtain the photo-thermal nanoparticles. The preparation method comprises the following steps: by taking a nano material as a carrier, generating a silicon dioxide shell on the surface of the nano material through modification, and then modifying the silicon dioxide shell (carrying out grafting reaction), so that the silicon dioxide shell is grafted with a silane group, and the prepared photo-thermal nano particle has high sunlight absorptivity and super-hydrophobic and super-oleophobic characteristics. The photo-thermal self-driven hydrophobic anti-icing coating is prepared by using the photo-thermal nanoparticles as a main filler and coupling a high-hardness film-forming substance and a related auxiliary agent.

The invention discloses an electrolyte, a lithium battery and electric equipment. The electrolyte comprises a solvent, a lithium salt and an additive, the additive comprises crown ether, alkali metal nitrate and cyclic lactone, and the alkali metal nitrate comprises at least one of potassium nitrate, rubidium nitrate and cesium nitrate. The electrolyte can form an SEI film with an inorganic-polymer composite structure on the surface of lithium metal, and the inorganic SEI film layer improves the uniformity of lithium ion transmission and inhibits the generation of lithium dendrites; the toughness of the SEI film is improved by the polymer part, and the damage of volume change to the integrity of the SEI film is reduced. Meanwhile, according to the scheme, the fast charging capacity of the electrolyte can be improved, and high-rate charging and discharging of the lithium metal battery can be achieved. Therefore, the electrolyte can stably act for a long time, and can tolerate the volume change of lithium metal.

The invention relates to the technical field of biological medicines, and provides a pharmaceutical composition for treating liver cancer, which is prepared from the following raw material medicines in parts by weight: 3 to 8 parts of radix paeoniae rubra, 1 to 3 parts of fructus sophorae, 3 to 10 parts of rhizoma polygoni cuspidati, 3 to 20 parts of spica prunellae, 3 to 20 parts of herba hedyotidis diffusae, 3 to 10 parts of herba violae, 2 to 5 parts of turtle shell, 1 to 5 parts of radix angelicae sinensis, 1 to 3 parts of rhizoma curcumae, 1 to 3 parts of apios fortunei maxim and 3 to 5 parts of fructus polygoni orientalis. According to the technical scheme, the problems that in the prior art, after radiotherapy and chemotherapy are conducted on patients, obvious side effects can be generated, such as the symptoms of inappetence, nausea and vomiting, diarrhea, stomachache, dental ulcer and the like, and some patients have the symptoms of listlessness, weakness, shortness of breath, alopecia and the like are solved.

The invention provides whitening and moisturizing essence as well as a preparation process and application thereof, and belongs to the technical field of cosmetics. The essence is prepared from tranexamic acid, nicotinamide, macromolecular hyaluronic acid, micromolecular hyaluronic acid, hexapeptide-2, an althaea rosea flower extract, a rhodiola sachalinensis extract, a glycyrrhiza glabra extract, a coast pine needle extract, a polyhydric alcohol humectant, vegetable fat and the like. Wherein the hollyhock flower extract, the rhodiola sachalinensis extract, the glycyrrhiza glabra extract and the coast pine needle extract are respectively obtained by adopting a special enzymolysis method. The tranexamic acid and the nicotinamide are used for synergistically whitening, the hyaluronic acid, the polyhydric alcohols and the vegetable fat are used for jointly moisturizing, the plant extract is used for enhancing oxidation resistance, whitening and safety, the components are ensured to be uniform and stable through a reasonable preparation process, and the effect of the essence is favorably improved.

The invention relates to the technical field of solid-state batteries, in particular to a surface-modified inorganic solid-state electrolyte material and a preparation method and application thereof. The surface modified inorganic solid electrolyte material comprises an inorganic solid electrolyte material and a surface modification layer which discontinuously coats the surface of the inorganic solid electrolyte material, wherein the surface modification layer is a nano oxide with a dielectric property. According to the invention, the solid electrolyte material with high ionic conductivity is used as a matrix, and the nano oxide coating layer with dielectric property is introduced on the surface, so that the diffusion energy barrier of lithium ions is reduced, and the conductivity of the lithium ions in the electrolyte is improved; in addition, the coating layer with relatively strong moisture stability and electrochemical stability also reduces the damage of moisture in the environment to the electrolyte and the reaction between the positive electrode material and the lithium metal negative electrode material and the electrolyte, enhances the stability of the solid-state battery under high voltage, inhibits the generation of lithium dendrites, and remarkably improves the cycling stability of the battery.

The invention belongs to the technical field of washing products, and particularly relates to sulfur acarus-killing liquid soap and a preparation method thereof. 100% of the shampoo comprises the following raw materials by weight: 10 to 12% of a surfactant, 0.2 to 0.5% of a humectant, 0.2 to 0.5% of isothiazolinone, 0.1 to 0.2% of essence, 1.2 to 2.2% of sulfuric acid, 1.2 to 2.2% of polyvinyl alcohol, 0.1 to 0.3% of a compound traditional Chinese medicine extract, 0.02 to 0.04% of shea butter, 1.2 to 3.2% of butanediol, 0.3 to 1% of an emulsifier, 0.01 to 0.04% of a eucommia bark extract, 0.05 to 0.1% of sodium hydroxide, and the balance of deionized water. The sulfur acarus-killing liquid perfumed soap effectively reduces skin problems by inhibiting reproduction of bacteria and acarus; sulfur has strong bacteriostatic and acarus killing effects, can kill acarus on the surface of skin, and reduces skin problems caused by the acarus. The traditional Chinese medicine composition has the effects of diminishing inflammation and resisting bacteria, and has a good curative effect on skin diseases such as contact dermatitis, seborrheic dermatitis and solar eruption.

The invention relates to the technical field of oil exploitation, and discloses a bactericide and a preparation method thereof.Sodium dodecyl benzene sulfonate, a quaternary ammonium salt modified cardanol polymer and water are added into a stirrer and stirred, and the bactericide is obtained after stirring is finished. Quaternary ammonium salt, pyridine and morpholine in the quaternary ammonium salt modified cardanol polymer all have good bactericidal effects. Pyridine has a strong bactericidal effect and can interfere with cell wall formation, DNA replication and repair and destroy a membrane structure; the morpholine can inhibit the generation of a cell wall membrane; the cardanol group has a better bactericidal effect, and the cardanol reacts with 2, 2-bis (bromomethyl)-1, 3-propylene glycol, so that the substitution degree of the cardanol is improved, and the bactericidal effect of the cardanol is better.

The invention discloses a method for preparing hexagonal SrFe by liquid phase doping 12 O 19 The invention relates to the field of permanent magnet ferrite preparation, and aims to solve the problem that the existing doping method easily leads to uneven raw material composition and the formation of mixed phases in the magnet; the invention comprises the following steps: 3+ / Sr 2+ Atomic ratio, weigh analytical pure Fe 2 O 3 、SrCO 3 ; The weighed raw materials were placed in a mortar and ground thoroughly to mix; C was added to the resulting mixture 8 H 20 O 4 Si and fully grind and mix evenly; put the ground and mixed powder into a mold for tableting to obtain a cylindrical sample; take the sample and sinter it in a muffle furnace and then cool it to room temperature with the furnace to obtain a liquid-phase doped SrM ferrite block; the present invention can use liquid C 8 H 20 O 4 Si as an additive for liquid phase doping of hexagonal SrFe 12 O 19 The saturation magnetization of ferrite is further improved, and the generation of impurity phase can be effectively suppressed.

The invention discloses a straw powder filled biodegradable composite material and a preparation method thereof, and relates to the technical field of biodegradable composite materials, the preparation method of the biodegradable composite material comprises the following steps: S1, pretreating straw; s2, impurities are removed through winnowing; s3, removing magnetic impurities; s4, cleaning and drying; s5, performing high-pressure steam treatment; s6, drying in the oven and crushing again; s7, adding into a high-speed mixer and mixing; s8, extruding the biodegradable composite material, and cooling and shaping the biodegradable composite material; and S9, cutting and polishing are conducted, and performance testing is conducted. The biodegradable composite material is prepared from agricultural waste, waste accumulation is reduced, sustainable development is promoted, the straw powder filled biodegradable composite material has biodegradability, high strength and good processability, and the straw powder filled biodegradable composite material is suitable for large-scale production. The problems of reducing agricultural wastes, enhancing mechanical properties and environmental protection performance, improving processability and reducing raw material cost can be solved.

The invention belongs to the technical field of garbage treatment, and particularly relates to an integrated cooperative treatment system and method based on multi-source waste. Comprising a household garbage treatment unit, a medical garbage treatment unit and a mixing unit and is used for collecting and mixing household garbage, medical garbage and sludge carbon and conveying the mixture to an incineration unit; the sludge co-processing unit is used for drying and carbonizing the sludge to generate sludge carbon and pyrolysis gas; and the incineration unit is used for incinerating the conveyed multi-source waste mixture, the incineration unit is connected with a detection unit and a control unit, flue gas is monitored in real time, the temperature of the incineration unit is regulated and controlled, and the conveying rate and the matching relation of the household garbage and the medical garbage are controlled, so that the concentration of chlorobenzene generated by the incineration unit is regulated. Synergistic efficient incineration of the household garbage, the medical garbage and the sludge is achieved, generation of harmful substances such as dioxin is effectively reduced while the incineration efficiency is improved, and cooperative treatment of various wastes can be achieved when the same household garbage is incinerated.

The invention discloses a hydrogen engine powder metallurgy valve seat ring and a preparation method thereof, and belongs to the technical field of powder metallurgy manufacturing, the valve seat ring is composed of a Fe-based alloy matrix and a working face magnetron sputtering plating layer, and the valve seat ring is prepared from, by mass, 0.6%-1.2% of C, 4.0%-7.0% of Cr, 0.8%-1.2% of Ti, 0.8%-1.2% of Nb, 2.5%-5.8% of V, 2.0%-4.0% of W, 3.5%-7.0% of Mo, 2.0%-2.5% of Co, 1.5%-2.0% of Mn, 1.0%-2.0% of Al and the balance Fe. 1.0%-1.5% of a solid lubricant and the balance of Fe, and the particle size is 100-120 meshes. The hydrogen engine powder metallurgy valve seat ring has the advantages that the hydrogen engine powder metallurgy valve seat ring is prepared through the warm pressing-die wall lubrication technology and the like, has excellent hardness and strength, high compactness, corrosion resistance, high abrasion resistance, high-temperature performance, hydrogen embrittlement resistance and hydrogen corrosion resistance and is suitable for hydrogen engines of automobiles, ships, military heavy equipment and the like.

The invention provides a preparation method and application of a skin care product rich in ergothioneine and nicotinamide, and belongs to the technical field of skin care products.According to the scheme, an ergothioneine solution is treated with a stabilizer, the pH value of a nicotinamide solution is adjusted, tea polyphenol is added, stability is improved, specific temperature, humidity and containers are specified in the storage link, and deterioration is prevented; ergothioneine and nicotinamide synergistically exert multiple effects to meet various requirements of consumers, the preparation process is scientific and reasonable, segmented stirring and temperature control are performed, specific components are added and treated, the product quality is ensured, finally, a high-temperature instantaneous sterilization method is adopted, the product safety and stability are ensured, the microbial index standard is met, and in a word, the preparation method is suitable for industrial production. The invention has obvious advantages and wide market prospect.

The present invention discloses a dual-purpose burner device for coal and ammonia, comprising an inner ammonia pipe, a primary air duct, a primary air sleeve, an outer ammonia sleeve, a secondary air sleeve, and a tertiary air sleeve, which are sequentially sleeved from the inside to the outside, wherein the outlets of the inner ammonia pipe, the primary air duct, the primary air sleeve, the outer ammonia sleeve, the secondary air sleeve, and the tertiary air sleeve face the burner, and the outlets of the primary air sleeve, the outer ammonia sleeve, the secondary air sleeve, and the tertiary air sleeve are expanded, and the outlet end of the outer ammonia sleeve is connected to a first blocking plate, and a first fire hole is formed on the first blocking plate, and the outlet of the inner ammonia pipe is a tapered tube, and the outlet end of the tapered tube is connected to a second blocking plate, and a second fire hole is formed on the tapered tube and the second blocking plate. The present invention improves the adaptability of the burner to fuel, improves the stability of combustion, and reduces NO during combustion. x Generation of.

The invention provides a control method and device of cooking equipment, a readable storage medium and the cooking equipment, and relates to the technical field of cooking equipment. The control method comprises the steps that the cooking equipment is controlled to execute cooking operation, and a hot air assembly is controlled to heat a cooking cavity and used for conducting heating disturbance on gas in the cooking cavity; wherein the cooking operation comprises at least one cooking stage; determining a target cooking stage in the at least one cooking stage; in the target cooking stage, a ventilation assembly is controlled to introduce oxygen-containing gas into the cooking cavity; wherein the temperature of the oxygen-containing gas is smaller than or equal to the temperature of the gas in the cooking cavity; in the cooking operation execution process of the cooking equipment, the cooking duration of the ventilation assembly is controlled to be smaller than or equal to the cooking duration of the hot air assembly. The oxygen-containing gas is actively introduced into the cooking cavity in the cooking stage, the content of harmful substances in the air frying cooking process is reduced, generation and residues of harmful substances such as acrylamide are reduced, and healthy soft fire cooking is achieved.

The invention belongs to the field of preparation of high-purity quartz, and relates to a method for directionally removing impurity elements of pegmatite type high-purity quartz, which comprises the following steps: (1) crushing raw materials by a crusher, washing ore, grinding and grading, reselecting and floating to obtain quartz concentrate; (2) adding the quartz sand into the leachate A for constant-temperature micro-pressure leaching, and washing to obtain primary quartz sand; the leachate A is mixed acid of HF, HCl and HNO3, the concentration ratio of the HCl to the HNO3 is (3-12): 1, the concentration ratio of the HCl + HNO3 to the HF is smaller than or equal to 3, and the sum of the concentrations of the HCl, the HCl and the HNO3 is larger than or equal to 3 mol / L; (3) roasting and water quenching to obtain intermediate quartz sand; (4) adding the quartz sand into the leachate B for ultrasonic leaching, washing, and carrying out high-temperature heat treatment to obtain high-purity quartz sand; the leachate B is a mixed acid of HF and HCl, HF is 0.5-2 mol / L, and the concentration ratio of HCl to HF is less than or equal to 3. According to the method, the 4N8-grade high-purity quartz sand can be obtained, the yield is high, the process is simple, and operation is easy.