14results about How to "Simple process equipment" patented technology

This invention discloses a method for increasing the hydrophilicity of titanium / titanium alloy dental implants using an electrochemical approach, comprising the following steps: S1, pretreating the titanium / titanium alloy dental implant to obtain a pretreated titanium / titanium alloy dental implant; S2, sandblasting and drying the pretreated titanium / titanium alloy dental implant obtained in S1 to obtain a treated titanium / titanium alloy dental implant; S3, acid etching the treated titanium / titanium alloy dental implant obtained in S2 to obtain an acid-etched titanium / titanium alloy dental implant; S4, electrochemical activation treatment to obtain an activated titanium / titanium alloy dental implant; S5, continuously rinsing the activated titanium / titanium alloy dental implant obtained in S4 with purified water for 20 seconds and drying it in a vacuum drying oven. This invention uses cyclic voltammetry (CV) electrochemically to activate the titanium / titanium alloy implant, thereby enhancing its hydrophilicity.

The present application belongs to the technical field of mineral processing, and particularly relates to a method for recovering manganese by suspending roasting of manganese nodule. The manganese nodule is crushed and magnetically separated, and then reduced and roasted, so that the strong magnetic mineral in the finely ground product is separated, and manganese concentrate is obtained. The present application has the characteristics of simple process equipment, low processing cost, small environmental pollution, low investment and operation cost, and high manganese recovery rate. The roasting product of the intermediate product can be used as a raw material for smelting manganese-iron alloy, and the final product manganese concentrate can be used as a raw material for smelting metallic manganese.

The application provides a reactor for producing phosphorus trifluoride, which comprises an automatic weighing and mixing unit and a reaction unit arranged in sequence. The reactor adopts one-step method to complete the reaction, and the process equipment is relatively simple and the production cost is low compared with the prior art. Furthermore, the device of the application adds molecular sieves for dehydration into dichloromethane, and the content of the molecular sieves is greater than the theoretical amount of the molecular sieves for dehydration of the dichloromethane, so that the side reaction caused by water can be greatly reduced, and the yield of the reaction is improved.

The invention discloses polymethylsilane capable of regulating and controlling the C / Si atomic ratio and a preparation method and application thereof.The preparation method comprises the steps that metal sodium is cut and crushed, and metal sodium fragments are obtained; adding the metal sodium fragments into an organic solvent, and heating until the metal sodium is in a molten state to obtain a mixture; stirring and cooling the mixture to obtain a sodium sand mixture; mixing methyl dichlorosilane, allyl methyl dichlorosilane, tetrahydrofuran and 15-crown ether-5, and then dropwise adding the mixture into the sodium sand mixture to react; the sodium sand in the preparation method has the characteristics of uniform particle size, high activity and clean surface; tetrahydrofuran and 15-crown ether-5 are added into dichloromethylsilane and allyl methyldichlorosilane, so that the single electron transfer rate of metallic sodium to dichloromethylsilane can be increased, the reaction activation energy can be reduced, the reaction efficiency can be improved, the molecular structure can be optimized, the loss of carbon elements can be made up, and the problem that PMS is rich in silicon after pyrolysis can be solved.

The application discloses a kind of purple pasture's composite bacteria anaerobic fermentation preparation method of livestock and poultry feed, belong to livestock and poultry green feed preparation technical field.The present application aims at solving the problems of poor specificity of existing pasture fermentation technology, large fluctuation of fermentation period, and the problem that the nutritional and biological activity advantages of purple pasture cannot be fully utilized.The fresh purple pasture is adjusted to the appropriate moisture content after pretreatment, inoculated with self-prepared multi-strain synergistic composite bacteria suspension, and then anaerobic fermentation is carried out after adding an appropriate amount of nutritional adjuvant, compacting and sealing.The fermentation time is controlled according to the environmental temperature of different seasons, and the finished product is obtained after natural airing and crushing after fermentation.The present application significantly improves the crude protein content of feed and reduces the crude fiber content through the synergistic effect of multi-strains, and the fermentation period is stable and controllable.The feed is palatable and rich in probiotics, which can effectively improve the growth performance of livestock and poultry, reduce the diarrhea rate, and has simple process and low cost, suitable for large-scale popularization and application.

This invention discloses a perovskite fluorescent patterning device and method based on laser-induced dehydration phase transition, belonging to the field of perovskite material laser processing technology. Addressing the problems of existing laser ablation damaging film integrity, difficulty in eliminating background fluorescence interference, and lack of mechanisms for multi-level grayscale control, this invention provides a hydrated perovskite precursor film that is transparent and fluorescence-free in the visible light band. Under ambient humidity conditions not exceeding 50% RH, the film is locally irradiated with an ultrafast laser. Utilizing water molecules in the film's own hydration structure, laser-induced local dehydration and inorganic framework rearrangement are achieved, directly writing perovskite phase transition patterns with multi-level fluorescence grayscale onto the transparent, fluorescence-free film.

The invention relates to the field of refractory materials, and discloses a high-purity alumina lightweight aggregate and a preparation method thereof. The aggregate is prepared from alumina micro powder with a specific particle size ratio: 50-60 wt% of micro powder with the particle size of 70-115 [mu] m, 20-30 wt% of micro powder with the particle size of 20-36 [mu] m and 10-20 wt% of micro powder with the particle size of 2.5-5 [mu] m, and each micro powder needs to meet the conditions that the content of alpha-Al2O3 is greater than or equal to 99.6% and the content of Na2O is less than or During preparation, water, the foaming agent, the foam stabilizer, the binding agent, the dispersing agent and the sintering aid are added in an external addition form, and the preparation method comprises the steps of mixing, pulping, foaming, foam stabilizing, pouring, drying, high-temperature sintering and the like. A foaming method is adopted to replace a traditional high-energy-consumption electric melting process, the sintering temperature is reduced to 1600-1700 DEG C, and the energy consumption is reduced by 30% or above. The obtained aggregate has high purity (Al2O3 is greater than 99.4 wt%), low volume density (1.5-2.0 g / cm < 3 >), high apparent porosity (50-70%), excellent normal-temperature compressive strength (20-30 MPa) and low thermal conductivity (0.3-0.7 W / (m.K) at 1000 DEG C), perfectly solves the problem that light weight, high strength and efficient thermal insulation performance are difficult to consider at the same time, and is suitable for producing working lining and thermal insulation layer products of high-temperature industrial kilns.

This invention discloses a method for preparing calcium ferrite from iron-based solid waste through low-temperature catalytic decomposition of phosphogypsum, belonging to the field of comprehensive utilization of solid waste. The method involves mixing, granulating, and roasting raw materials, including iron-based solid waste and phosphogypsum, to obtain calcium ferrite-containing sintered material. The roasting process involves feeding the material onto a belt roaster, first performing reduction roasting under a reducing atmosphere, and then performing oxidative roasting under an oxidizing atmosphere. This method fully utilizes the mineral composition characteristics of iron-based solid waste and phosphogypsum from the steel industry. By controlling the temperature and atmosphere during the high-temperature solid-phase reaction, the method achieves the directional transformation of iron and calcium components in the two industrial solid wastes into calcium ferrite-based products, while effectively removing harmful elements, resulting in high-quality calcium ferrite products.

The present application relates to a kind of boron stainless steel sheet for thermal neutron absorption preparation method, comprising the following process steps: (1) induction melting; (2) atomization and deposition; (3) forging; (4) hot rolling; (5) profile processing.The present application is through innovative process route, reasonable melting, plate processing deformation and heat treatment process, significantly improve the microstructure of material, refine hard and brittle boride particles, and then improve the hot workability of material and the mechanical properties of finished plate, meet the higher requirements of boron stainless steel sheet for thermal neutron absorption.According to the process manufactured by the present application, the performance of the plate is similar to powder metallurgy boron stainless steel, also has excellent comprehensive performance, and the process flow is shorter, and the manufacturing cost is also lower.

The application provides a method for in-situ combustion synthesis of high-purity nanometer silicon carbide powder, and belongs to the technical field of inorganic nanometer material preparation, and comprises the following steps: placing water-soluble saccharide substances, gel monomers, water-soluble solutions of a crosslinking agent and an initiator into ion exchange columns respectively for filtration purification, then mixing the water-soluble saccharide substances, the gel material and high-purity silicon powder to form a sol, further carrying out in-situ gel solidification and pre-carbonization treatment to obtain a Si / C composite material block; carrying out combustion synthesis reaction on the obtained Si / C composite material, grinding the obtained block-shaped product to obtain the high-purity nanometer silicon carbide powder. The high-purity carbon source and the silicon source are fixed by the gel network, the silicon powder is uniformly embedded in the carbon skeleton, uniform dispersion and close combination of the two are realized, and the in-situ combustion synthesis reaction is efficiently promoted. The raw material cost in the application is low, the preparation process is simple, the environment is friendly, and the application is suitable for industrialized large-scale production of high-purity nanometer silicon carbide powder.

This invention discloses a method for preparing polymethylsilane. The method includes cutting and crushing metallic sodium to obtain sodium fragments; adding the sodium fragments to an organic solvent and heating to a molten state to obtain a mixture; stirring and cooling the mixture to obtain a sodium sand mixture; mixing dichloromethylsilane, tetrahydrofuran, and 15-crown ether-5 and then adding the mixture dropwise to the sodium sand mixture for reaction, followed by cooling, solid-liquid separation, and distillation. This preparation method obtains a sodium sand product with uniform particle size, high activity, and clean surface by rapidly cooling after high-temperature dispersion of metallic sodium in a specific organic solvent system. By adding tetrahydrofuran and 15-crown ether-5 to dichloromethylsilane, the single electron transfer rate of metallic sodium to dichloromethylsilane can be increased, the activation energy of the reaction can be reduced, and the reaction efficiency can be improved. Furthermore, the continuous dropwise addition saves reaction time.

This invention discloses a highly ordered micron-shaped flower material with three phases coexisting: tetragonal scheelite-type BiVO4, monoclinic BiVO4, and [Bi6O5(OH)3](NO3)5·3H2O, and its control method. The method includes: preparing a mixed solution A of bismuth nitrate and hexadecyltrimethylammonium bromide and a solution B of ammonium metavanadate using deionized water as a solvent; adding mixed solution A dropwise to solution B under vigorous stirring to obtain a reaction precursor solution C; placing solution C in a microwave reactor and performing a microwave radiation reaction at 100°C without pH adjustment to obtain a solid-liquid suspension sample; and centrifuging, washing, and drying the sample to obtain the three-phase coexisting product. This invention utilizes microwave radiation technology to control the morphology and composition of the product without the need for acid or alkali conditions. The method is simple, efficient, and energy-saving.

The invention discloses a carbon-coated pre-magnesium silicon monoxide negative electrode material and a preparation method thereof, the negative electrode material comprises a silicon core, a silicon-magnesium composite porous layer and a carbon-coated layer, the silicon-magnesium composite porous layer comprises MgSiO3 and Mg2SiO4 with porous characteristics, and the porosity is not less than 30%; the material shows a unique peak position and intensity relationship in an XRD diffraction pattern, and Mg2SiO4 is used as a main phase. According to the preparation method, through molten salt mediated low-temperature solid-phase reaction and addition of reducing gas during heat treatment, energy consumption is greatly reduced, a generated Mg2SiO4 crystal structure is more stable than traditional MgSiO3, and a porous structure (porosity is larger than 30%) formed through the cooperation reaction enables the material to maintain high capacity of 1621.49 mAh / g, meanwhile, the first efficiency is improved to 85.91%, and the cyclic expansion rate is reduced by 40% or above.

The utility model discloses a high-temperature flue gas rotary furnace waste heat utilization system which comprises a rotary cooling furnace and a rotary heating furnace, the rotary cooling furnace and the rotary heating furnace both comprise furnace bodies, heat accumulators are arranged in the furnace bodies, a kiln tail cover and a kiln head cover are distributed at the two ends of the furnace bodies, and lifting plates are arranged on the inner walls of the furnace bodies; the high-temperature flue gas pipe is connected with a kiln tail cover of the rotary cooling furnace, a kiln head cover of the rotary cooling furnace is sequentially connected with the dust remover, the induced draft fan, the chimney and the normal-temperature gas pipe through the cooling flue gas pipe, and the heating gas pipe is connected with the kiln tail cover of the rotary heating furnace; the storage bin is arranged at the bottom of a kiln tail cover of the rotary cooling furnace, the discharge valve is arranged at the bottom of the storage bin and connected with a kiln head cover of the rotary heating furnace through the high-temperature feeder, and the bottom of the kiln tail cover of the rotary heating furnace is connected with the kiln head cover of the rotary cooling furnace through the feeding end of the elevator of the feeder and the discharging end of the elevator. According to the system, the maximum utilization of the high-temperature flue gas waste heat is realized.