45results about How to "Good stripping performance" patented technology

The invention provides a method for preparing a porous alumina ceramic core. The ceramic core comprises the following raw materials: electric melting-corundum powder, porous alpha-Al2O3 powder, TiO2 powder and paraffin. The method comprises the following steps: mixing the electric melting-corundum powder, the porous alpha-Al2O3 powder and the TiO2 powder; heating an oil bath crucible type stirrer to 100 to 120 DEG C; adding the paraffin into the oil-bath crucible type stirrer to be melted; adding mixed powder to the paraffin, and stirring the mixture to obtain mixed slurry; pressing a core by adopting a hydraulic core-pressing machine, controlling the temperature of the mixed slurry to between 95 and 110 DEG C and the injection pressure to between 3.0 and 3.5MPa; and roasting the pressed core by adopting a bell type sintering furnace. The porous alumina ceramic core prepared by the method has the porosity of between 45 and 55 percent, and can effectively improve the core removing performance of the core.

The invention discloses a double-pyrazole extracting agent derived from o-phenanthroline with the following structural general formula, and a preparation method and application of the double-pyrazoleextracting agent. In the formula, R is any one selected from n-octyl, n-butyl, isobutyl, ethyl, pyridyl and phenyl. The double-pyrazole extracting agent derived from the o-phenanthroline provided by the invention has a unique rigid structure and an alkyl chain for improving the solubility, and simultaneously only four elements of C, H, O and N are contained, so that the extraction kinetics of a separation extraction system can be greatly increased, the extraction capacity of an organic phase can be increased, secondary pollutants cannot be produced, and thus the environmental protection is facilitated. The extraction agent can be used to separate Ans (actinide elements)/Lns (lanthanide elements), and can not only form a separation extraction system of the Ans/Lns, but also can be used to form a separation reverse extraction system of the Ans/Lns.

The invention relates to a method for producing germanium concentrated ore from germanium-containing industrial liquor, and belongs to the technical field of nonferrous metallurgy. The method comprises that: a, a germanium complexing agent is added into the germanium-containing industrial liquor of which pH is 0.5 to 3, wherein the complexing agent is organic acid containing hydroxyl or carboxyl or/and salt of the organic acid, and the weight ratio of the complexing agent to the germanium is 3-10:1; b, an organic reagent of quaternary ammonium with an R4N structure or tertiary amine with an R3N structure is used as an extracting agent to extract the germanium in the liquor obtained in step a, wherein R is hydrocarbyl or alkyl or fatty group, N is organic ammonium salt, and the extracting agent accounts for 10 to 50 percent of the extracted liquor by volume; c, NaOH water solution or Na2CO3 water solution of which the concentration in percentage by weight is 5 to 30 percent is used for reversely extracting the germanium-containing organic phase obtained in step b; and d, the pH of the obtained reverse extracted liquor is adjusted to 8 to 12 by acid, then the liquor is dehydrated twice and filtered, and the sediment is dried to form the germanium concentrated ore. The method can produce the germanium concentrated ore from various germanium industrial liquors, the extracting agent and the complexing agent are easily obtained, the extracting and reverse extracting effects are good, and the yield of the germanium is high.

The invention relates to the technical field of preparation of ceramic, in particular to a method for improving the poriness of an alumina ceramic mold core. The technical scheme is as follows: feeding plasticizer which occupies 15 to 20 percent of core material by weight into a container with a stirrer and heating up to 100 to 120 DEG C; pressing mold core slurry into a mold core on an injection machine, insulating the mold core for 4 hours under the temperature of 200 DEG C, heating up to 400 DEG C and insulating for 2 hours, heating up to 600 DEG C and insulating for 2 hours, heating up to 900 DEG C and insulating for 2 hours, heating up to 1250 DEG C and insulating for 4 hours, and cooling down to 100 DEG C along with a furnace and taking out from the furnace; soaking the mold core in ethylsilicate digest with the viscosity of (3.6 to 8)*10<-6> Pa.s for 30 to 40 minutes, air drying for 24 hours and then ammonia drying for 30 minutes; placing the mold core which is strengthened for the first time in phenolic alcohol-soluble varnish, soaking for 2 to 3 hours under ambient temperature, and then air drying for 24 hours; and baking the strengthened mold core under the temperature of 150 DEG C for 2 hours to make the end product.

The invention discloses a branched-chain long-chain fatty acid base imidazoline extraction agent and a preparing method and application thereof. The imidazoline extraction agent comprises multiple N atoms and long-branch-chain alkyl groups. The preparing method of the imidazoline extraction agent comprises the steps that in the normal pressure, carboxylic acid and polyethylene polyamine are subjected to the reaction under the action of a solid catalyst, after the reaction is finished, the solid catalyst is recycled through solid-liquid separation, the liquid mixture is distilled, the raw material incompletely reacted is recycled, and then the branched-chain long-chain fatty acid base imidazoline extraction agent is obtained. The preparing method has the beneficial effects that reaction conditions are moderate, the catalyst can be repeatedly used, and equipment investment and operation cost are low; the imidazoline extraction agent is used for extraction negative ions including tungsten, molybdenum and vanadium, the beneficial effects that the extraction volume is high, the phase splitting time is short, and the extraction and reverse extraction performance is excellent; and good industrial application prospects are achieved.

The invention discloses a peelable photocuring glass coating in which phosphorus-containing urethane acrylate, epoxy acrylate and ethyl acetate are used together as main body resin, and active monomers, photoinitiator, filling agents and other additives are also added. When glass is coated with the peelable photocuring glass coating, not only is a good protection function achieved for the glass, but also a good peeling property is achieved. Meanwhile, a preparation method and a use method of the coating are both energy-saving and environment-friendly, the cost of a procedure of glass surface protection can be effectively lowered, a soft film can be formed, and the machining process is not affected.

The invention provides a water-soluble ceramic core for investment precision casting aluminum alloy and a preparation method of the water-soluble ceramic core. The water-soluble core is prepared fromthe following ingredients: a base material and mineralizing agents, wherein the base material is emery powder, and the mineralizing agents are electric melting quartz powder, sodium chloride and potassium chloride. The water-soluble ceramic core solves a complex inner cavity passage structure part for aluminum alloy investment precision casting, not only guarantees the dimensional precision of thecore and press formability, but also achieves good wet strength and sintering strength, the strength after sintering is 7-10MPa, and the strength after strengthening is 20-25MPa.

The invention relates to a high spectral image strip noise elimination method with integration of wavelet transformation and local interpolation. The high spectral image strip noise elimination method with integration of wavelet transformation and local interpolation includes the following steps: inputting a high spectral image data cube; judging the high spectral image wave band data; rejecting the damaged high spectral image wave band data; reading the normal high spectral image data of the kth wave band; respectively using two dimension stationary wavelet and local interpolation to filtering strip noise of the high spectral image data; and then performing fusion processing. The high spectral image strip noise elimination method with integration of wavelet transformation and local interpolation can effectively eliminate common thin strip noise, can eliminate the strip noise of broadband and ultra wide band and the strip noise which is distributed without rules, can preferably keep some details and edge geometrical information in the images, at the same time can be applied to different high spectral images, and has relatively high universality.

The invention discloses a gallium extracted waste liquor resource utilization technology in the process of the one-step acid solution method technology. The technology comprises the following steps that firstly, iron in gallium extracted waste liquor is extracted, and low-iron raffinate and an iron-contained load organic phase are obtained; secondly, a stripping agent is used for carrying out reverse extraction on the load organic phase, and a reverse extraction liquid ferric chloride solution is obtained; and thirdly, the ferric chloride solution is subjected to mist spraying and roasting, thus ferric chloride is decomposed to obtain ferric oxide red and chlorine hydride gas, the low-iron raffinate is utilized for absorbing and dissolving the chlorine hydride gas in the acid absorbing working procedure, and an obtained acid solution serves as acid for coal ash acid solution in the one-step acid solution method. According to the technology, resource recycling of iron ions, aluminum ions and hydrochloric acid in the waste liquor can be achieved with the low cost, and the technology is environmentally friendly and saves energy.

The invention relates to a method for manufacturing the surface compact internal loose ceramic core for precision casting of the hollow turbine blade, and effectively solves the problems of insufficient deformability and difficulty in core removal of the ceramic core. The method comprises the following steps of 1, preparing a resin mold, specifically, manufacturing a core resin mold by adopting aphotocuring rapid molding method; 2, preparing a ceramic slurry, specifically, preparing the ceramic slurry for gel injection molding; 3, manufacturing a ceramic core, specifically, pouring the ceramic slurry into a ceramic core resin mold; 4, carrying out first dipping treatment, specifically, carrying out impregnation treatment on the pre-sintered degreased ceramic core by adopting a low-concentration silica sol; and 5, carrying out secondary impregnation treatment, specifically, carrying out dipping treatment on the core by adopting a high-concentration silica sol. According to the method,a ceramic core blank is manufactured on the basis of a photo-curing rapid molding technology and a gel injection molding technology, silica sol with different concentrations is impregnated twice, thedipping depth of the silica sol is controlled, and therefore the preparation of the aluminum oxide-based ceramic core with dense surface layer and central porous is realized.

The invention belongs to the technical field of high polymer materials, and relates to an alumite sticky layer coating and a using method, in particular to an alumite sticky layer coating containing acrylic monomers. The alumite sticky layer coating is prepared from, by mass, 40-60 parts of acrylic monomers, 1-4 parts of silicon oxide powder, 1-6 parts of rosin and 50-70 parts of a dispersion solvent. The invention further discloses a using method of the alumite sticky layer coating containing the acrylic monomers. Various auxiliary materials and acrylic resin are adopted for forming the alumite sticky layer coating with the excellent stamping performance according to the certain ratio, and acrylic resin with the single good stamping performance is converted into the alumite sticky layer coating with the good stamping performance, slitting performance, adhesive force and stripping performance. According to industrial application, compared with common alumite, alumite obtained through the alumite sticky layer coating containing acrylic monomers overcomes the defects of not solid hot stamping, leakage stamping and the like and has the obvious advantage.

The invention discloses a spinel-magnesium-based ceramic core and a preparation method thereof, and belongs to the field of ceramic core preparation in the field of precision casting. Raw materials of the spinel-magnesium-based ceramic core comprise a powder raw material and a binder, and the powder raw material comprises the following components in percentage by mass: 50%-90% of spinel powder, 0%-30% of zirconium oxide powder, 0%-5% of titanium dioxide powder and the balance of magnesium oxide powder; and the mass of the binder accounts for 15-25% of the mass of the powder raw material. The preparation method of the spinel-magnesium-based ceramic core comprises the following steps: mixing powder according to the ratio, preparing a binder, mixing the preheated mixed powder and the binder to prepare slurry, carrying out compression molding on the slurry by adopting a hot-press injection molding method, and sintering to obtain the spinel-magnesium-based ceramic core. The spinel-magnesium-based ceramic core has the advantages of being high in strength, small in shrinkage rate and easy to remove, and meanwhile the thermal shock resistance is improved.

The invention discloses a method for separating and extracting enriched gold from cyanide gold-leaching barren solution, which comprises the following steps: evenly mixing trialkyl phosphorus oxide and tributyl phosphate, and adding diluent to obtain extracted organic phase; adding salting-out agent into cyanide gold-leaching solution; adding the extracted organic phase, oscillating and contacting for 1-20 min at the normal temperature, and setting aside for phase-splitting to obtain gold-bearing organic phase, wherein the volume ratio between the extracted organic phase and the cyanide gold-leaching liquid is 1:1-1:20; and carrying out back-extraction on the gold-bearing organic phase by back extracting agent at 40-70 DEG C to obtain back-extracted gold solution. By adopting the method, the extraction ratio reaches more than 96 percent, and the back-extraction ratio reaches more than 90 percent; and the extracted organic phase can be recycled circularly and has remarkable economic and environmental benefits. The invention has simple operation, good extraction effect, simple and easily-obtained extraction agent, low price, less consumption amount, fast extraction speed, short phase-spitting time, higher selectivity, convenient industrial achievement, saved cost and improved efficiency.

The invention discloses a 3D printed hollow blade ceramic core material, a preparation method thereof and a method for manufacturing a hollow blade ceramic core by using the material. The preparationmethod is characterized in that modifier zirconite is added into a traditional 3D printing pure silicon oxide ceramic formula; therefore, the high-temperature performance of the 3D printing silicon oxide ceramic product is obviously improved; the average high-temperature bending strength is improved from 6.72 Mpa of pure silicon oxide to 24.76 Mpa after heat preservation is conducted for 30 min atthe temperature of 1340 DEG C, the soda boiling core removal effect of the hollow blade ceramic core made of the material is further optimized, and the soda boiling core removal time of a turbine blade is shortened from about 30 days to 2 days.