47results about How to "Has a reducing effect" patented technology

The invention discloses a method for using biomass waste for preparing a nitrogen-doped carbon nanotube coated metal particle composite material. The method includes the following steps that firstly, the biomass waste and KOH are evenly mixed in deionized water, an obtained heterogeneous mixture is carbonized under the protection of inert gas, and biomass charcoal is obtained; and then, the biomass charcoal, a nitrogenous nonmetallic compound and water-soluble divalent metal salt are evenly mixed in methyl alcohol, the obtained heterogeneous mixture is subjected to pyrolysis under the protection of the inert gas, and therefore a target product is obtained. By the adoption of the method, a two-step pyrolysis technology is adopted for achieving growth of carbon nanotubes, and dispersion of metal nanoparticles and formation of a cooperative acting mechanism are promoted; the stability of the composite material is reinforced through the structure of carbon nanotube coated metal nanoparticles; the surface activity and dispersity of a carbon layer are improved through in-situ decoration of the nitrogen element; and the contact and active site point number is increased through the formation of a rich pore structure and the high specific surface area.

The invention provides a nano-grade ZnO loaded magnetic biological carbon composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: step 1: carrying out thermal hydrolysis on a biomass under an alkaline condition to extract plant fibers; after drying, carrying out pre-carbonization treatment; mashing and sieving with a sieve with the size of 10to 20 meshes; step 2: mixing a ferrous salt solution and a potassium hydroxide solution; adding soluble zinc salt; step 3: adding the sieved plant fibers into the solution formed by step 2; uniformlymixing and adding a potassium nitrate solution; after sufficiently stirring, treating a mixture in a water bath; continuously stirring and ageing until black gel is formed, so as to obtain a black gel solution; step 4: after washing and drying the black gel solution, generating dry gel; calcining the dry gel and continuously introducing inert gas; after washing and drying, obtaining the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst. According to the nano-grade ZnO loaded magnetic biological carbon composite photocatalyst, magnetic biological carbon is used as a carrier of the photocatalyst, and the problem that the photocatalyst in chromium-containing sewage treatment is difficult to separate and recycle is solved.

The invention relates to a preparation method of a lithium iron phosphate material as a lithium ion battery positive electrode active substance. The preparation method comprises the following steps: dissolving a lithium source, an iron source and a phosphorus source in a reducing agent, adding a chelating agent, and uniformly stirring to form a mixed solution; performing a hydrothermal reaction; washing and drying to obtain lithium iron phosphate with a grade structure; and mixing with a carbon source, and calcining in a reducing atmosphere to obtain carbon-coated lithium iron phosphate with the grade structure. Compared with the prior art, the preparation method has the beneficial effects that the purity of the product is increased; the reducing agent has a reducing function, the chelating agent has a structure guiding function; the conductivity of lithium iron phosphate is enhanced, and the electrochemical property is improved; a resultant temperature interval is large, and a great application value and a bright development prospect are achieved; the specific capacity is high, the specific surface area is moderate, the cycle performance is good, the repeatability is high, the processing property is excellent, and the demand on a high energy storage device in practical production can be met.

The invention discloses a method for treating trivalent chromium complexing wastewater and synchronously recycling chromium by combination of a reducing composite chemical agent and ultraviolet light,and belongs to the field of waste water treatment. A method for treating a copper complex and synchronously removing copper by combination of a reducing composite chemical agent / UV comprises the following steps: A, chemical feeding: feeding the reducing composite chemical agent in trivalent chromium complexing wastewater and stirring, and regulating pH of the wastewater to be 4-10; B, ultravioletillumination: carrying out ultraviolet light illumination treatment on the waste water which is stirred uniformly, and separating out chromium in a precipitate mode; and C, chromium recycling: recycling chromium by a solid-liquid separating method. By the method, trivalent-chromium-containing complexing wastewater such as leather making, electroplating and dyestuff can be safely and effectively treated, and the chromium can be recycled.

The invention provides a nitrogen-doped carbon-based metal monoatomic catalyst as well as a preparation method and application thereof. A hard template method is selected to prepare the metal monoatomic catalyst, an amino-containing organic body and a chlorine-containing organic body are used as polymerization monomers, a transition metal salt is used as a metal source, a ratio relationship of a template, the organic monomers and the metal salt and reaction conditions are precisely regulated and controlled, so that in-situ polymerization of the organic monomers on the surface of the template and simultaneous chelating of transition metal ions can be realized to prepare the highly exposed monoatomic metal catalyst. The preparation method of the catalyst provided by the invention can ensurethe load capacity of the monoatomic metal to the greatest extent, and the condition that a nitrogen-doped carbon material wraps a metal oxide can be avoided through reasonable regulation and control of reparation conditions; and in addition, the Fenton catalyst prepared by the method has the advantages of high activity, a low metal loss rate and strong regeneration ability.

A cooperative treatment method for dioxin and heavy metal in flying ash on the basis of steel slag and mineral slag is characterized by comprising the following steps that (1) to-be-treated flying ashand a dehalogenation agent are mixed according to a mass ratio of 4:1-9:1, mixed milling is conducted by a planetary mill or a ball mill, and after 2-10 h of continuous ball milling, organochlorine degradation flying ash is obtained; (2) the organochlorine degradation flying ash and a curing agent are mixed according to the mass ratio of 4:1-9:1 and are stirred evenly, and a flying ash mixture isobtained; and (3) water or a reducing agent of the mass ratio of 15% is added into the flying ash mixture, the obtained mixture is put into a compaction die for compaction forming, pressure is 20-50kN, pressing time is 15-30 s, maintenance is conducted for 3-7 days, and a flying ash solidified body is obtained. Through the cooperative treatment method, dioxins and heavy metal pollutants can be treated simultaneously, steel slag serves as a main material of the dehalogenation agent and can be utilized efficiently, and the problem of a low comprehensive utilization rate of the steel slag is solved while the flying ash is treated.

The invention relates to a method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore. After being smashed to certain mesh degree, scherbinaite coal contained primary ore is sent into the main bed and the secondary bed of a fluidzed bed furnace; different blasting intensities when the main bed and the secondary bed roast are controlled, twice fluidization roasting is carried out to completely decarburize; after the decarburization material of the main bed and the secondary bed is added with barium salt, the mixture is roasted in a rotary kiln. The invention has the beneficial effects of short process flow, simple and easy operation, high yield and low production cost and can realize production automation control; vanadium has high immersion ratio which can be above 80%; and sulfuric acid consumption amount is low, only about 50 kg of sulfuric acid is consumed for each ton of cinder. The invention is the optimum path for comprehensively utilizing scherbinaite coal contained primary ore and can realize 'one ore three factories', i.e. a stone coal mine, a power station, a vanadium plant and a cement plant. The scherbinaite coal contained primary ore is in fluidized bed roasting to generate electricity; electricity is generated for the cinder to extract vanadium; the vanadium extracting tailings are high-quality filler of the cement plant to realize comprehensive utilization of resources, thus creating great economic benefit and social benefit.

The invention relates to a method for performing microwave solvothermal in-situ synthesis on carbon-coated lithium iron phosphate. The method comprises the following steps: dispersing a lithium source and an iron source in an alcohol reducing agent; adding a phosphorus source, stirring, adding a chelating agent, and stirring, thereby obtaining a precursor solution; adding part of the precursor solution into a microwave reactor, heating and reacting to obtain a product; washing the obtained product and drying, thereby obtaining a precursor; and calcining the precursor in a reducing atmosphere, thereby obtaining the product. The method disclosed by the invention has the beneficial effects that the time can be saved by virtue of in-situ carbon coating, and the uniformity of coated carbon can be ensured. Meanwhile, the conductivity of the lithium iron phosphate can be enhanced by virtue of the coated carbon, and the electrochemical performance is improved; the lithium iron phosphate is of a three-dimensional bi-continuous structure, nano-particles in the structure are connected with one another, a three-dimensional network is formed, the lithium-ion transmission distance is greatly shortened, and the electrochemical performance of the material is improved; the reaction period is short, and the process is simple; and the prepared lithium iron phosphate is high in specific capacity, good in cycle performance, high in repeatability and excellent in processability.

A method for continuously producing a stainless steel and stainless steel composite coil, which belongs to the field of stainless steel composite board technology. The method comprises the following steps: continuously sandwiching a solder layer between two kinds of stainless steel, coiling coils of two different materials by a tension of 3 to 30 tons, applying a special high-temperature anti-bonding agent on a roller with non-composite surface, transferring the reeled pre-combined coil to a power induction furnace, heating to 950 to 1,130 DEG C, keeping the temperature, quenching, and tanking out to obtain desired stainless steel composite coil with a combination rate above 99.5% and a shear strength larger than 300 MPa. The method has the advantages that two kinds of stainless steel coils with different trademarks and different thickness can be combined together to obtain a composite stainless steel coil with high corrosion resistance on one side and high mechanical strength and high heat transfer coefficient on the other side.

The invention provides a heavy metal activator and application thereof in soil joint restoration. The activator preparation comprises the following steps that (1) straws are crushed and sieved, the crushed straws are added into an alkaline solution, a heating reacting is conducted, filtering is conducted after finishing the heating reaction, the filtration residue is taken and washed with water, washing is repeated until the eluent is neutral, and drying is conducted to obtain the lignin-removed straws; (2) urea is added into the lignin-removed straws, composting fermentation is conducted, rapeseed meal is added after the fermentation is thoroughly decomposed, a functional microbial agent is added, secondary fermentation is conducted after uniform stirring, and then after the second fermentation, the straw bio-organic fertilizer is obtained; and (3) organic acid is added into the straw bio-organic fertilizer, and uniform mixing is conducted to obtain the heavy metal activator. According to the application, through crop-rotation combined planting of soybeans and oilseed rape, the heavy metal is activated by the heavy metal activator, so that heavy metal in the soil can be convertedinto an effective state as much as possible to realize the continuous absorption of heavy metal, the joint restoration efficiency is improved, and the easy-to-implement and efficient combined restoration method is also provided for restoring heavy metal contaminated farmland soil.

The invention provides a preparation method of a low-oxide-inclusion high-performance powder metallurgy nickel-base superalloy, and belongs to the field of metal materials. The preparation method comprises the steps that firstly, spherical prealloyed powder is prepared from the components by adopting a vacuum gas atomization powder processing technology in percentage by mass: 0.16-0.19% of C, 9.8-12% of Cr, 16.5-17.5% of Co, 7.7-8.8% of W, 0.65-0.88% of Mo, 5.75-6.30% of Al, 0.025-0.033% of B, 0.055%-0.087% of Zr, and the balance of of Ni; then the prealloyed powder with certain granularity and TiH2, TaH and HfH2 powder with certain content and granularity are selected for being uniformly mixed; a mixture is loaded in a rubber covering sleeve for cold isostatic compaction; then the rubbercovering sleeve is removed and a formed green body is placed in a high vacuum hot-pressing furnace for hot-pressing sintering compactness according to a certain sintering process; then the compact sintered green body is forged or rolled according to the requirement to obtain workblank parts; and finally, the parts are subjected to timeliness treatment. By adopting the preparation method of the low-oxide-inclusion high-performance powder metallurgy nickel-base superalloy, the oxygen content of prepared nickel-base superalloy materials is low, and high endurance strength and high low-cycle fatigue can be obtained.

The invention belongs to the technical field of sewage biology, and particularly relates to a method for extracting activated sludge extracellular polymers. The method comprises the following steps: pretreating activated sludge, carrying out soluble extracellular polymeric substance (S-EPS) extraction, carrying out loosely bound extracellular polymeric substance (LB-EPS) extraction, carrying out ionic tightly bound extracellular polymeric substance (TB-EPS) extraction, and carrying out hydrophobic tightly bound extracellular polymeric substance (TB-EPS) extraction. According to the method forextracting the activated sludge extracellular polymers, the liquid phase environment of EPS extraction is optimized, the combination of different extraction methods is screened, an inorganic ion extraction agent is selected, and different types of surfactants are screened to separately and sequentially extract four different types of EPS, namely S-EPS, LB-EPS, ionic TB-EPS and hydrophobic TB-EPS in the activated sludge, so that extraction efficiency of different types of EPS is high, purity is high, and the cell damage is small. The adopted inorganic ionic extraction agents are small in changedegree of the extracellular polymer, are green and environmentally friendly, and are accurate in quantification.

A fully-closed working chamber for vehicle sterilization, disinfection and deflavour comprises a working chamber main body consisting of a chamber body, an equipment chamber and an operation chamber, wherein the chamber body is provided with a main door for the entry of the vehicle needing sterilization and disinfection and an auxiliary door for the entry of staff; the main door is connected directly with the outdoor and the auxiliary door is connected indirectly with the operation chamber; the top of the chamber body is provided with an interlayer as the equipment chamber within which a ventilation purification system mainly comprising a fan, a ventilating pipe and an air volume control valve and an exhaust discharge system mainly comprising an exhaust fan, an electric valve and a discharge pipe; the chamber body is further provided with an efficient ultraviolet germicidal lamp and a negative ion generator. The invention has the advantage of good sterilization and disinfection, high working efficiency, complete function of sterilization, disinfection and deflavour and omni-directional sterilization and disinfection for the external and the internal of the vehicle, which quickly, fully and basically solves the problem of air pollution in the vehicle.

A nonwoven fabric sheet having cleaning ability which comprises a web layer (i) formed by the airlaying process which consists mainly of heat-bondable fibers having a fineness of 1.5-50 dtex and has a basis weight of 10-250 g / m<2> and, superposed over the layer (i), a web layer (ii) formed by the airlaying process which consists mainly of 20-100 wt.% heat-bondable fibers (a) having a fineness of 1-4.4 dtex and 80-0 wt.% cellulosic pulp (b) [provided that (a)+(b)=100 wt.%] and has a basis weight of 10-400 g / m<2>, and optionally further includes, superposed over the web layer (ii), a web layer (iii) which is the same as the web layer (i), these layers having been united into a sheet as a whole by the thermal bonding of these heat-bondable fibers. The sheet contains an ingredient (c) comprising either a powder (c1) of an alkaline inorganic salt having cleaning ability or an additive (c2) comprising a powdery organic acid having a hydroxy group and a melting point of 70 DEG C or higher, the ingredient (c) being disposed in an amount of 5-300 g / m<2> in at least one of the following positions: at the interface between the layer (i) and the layer (ii), in the layer (ii), and at the interface between the layer (ii) and the layer (iii). The sheet has an overall basis weight of 40-1,500 g / m<2>.

The invention relates to a green tea preparation method capable of removing pesticides from tea leaves. The method comprises steps as follows: a, cleaning of fresh leaves; b, removal of the pesticides; c, fixation; d, fermentation; e, spreading for cooling; f, roasting; g, aroma increasing; h, high-temperature steaming; I, cooling and roasting: the tea leaves subjected to treatment in the step h are shaped or subjected to bulk packaging, then transferred to a cooling house for roasting at the temperature controlled to range from 18 DEG C to 28 DEG C, roasted and cooled for 20-25 days, then subjected to quality inspection and put into storage. The method has the beneficial effects as follows: multiple tedious toxin removal methods for tea trees, tea gardens and the like can be omitted, the dry tea pesticide residues can be removed successfully, tea completely reaches the tea leave export standard after being tested by a quick test meter for tea leave pesticide residues, the method has a reduction effect, the peculiar smell of dry tea leaves can be removed, a lot of labor is omitted for commercial application, the effect and the efficiency are significant, and the method is applicable to green tea, black tea, white tea, oolong tea and the like.

The invention relates to a carbon steel pipeline forging process. The carbon steel pipeline forging process comprises the following steps: 1) theoretical analysis, drawing a carbon steel pipeline heating curve, the abscissa is the heating time, and the ordinate is the heating temperature; 2) according to the steps 1) The obtained heating curve of the carbon steel pipeline. The carbon steel pipeline is subjected to heat treatment; 3) The heated carbon steel pipeline is subjected to pier thickening and elongation treatment. The invention provides a carbon steel pipeline forging process with high process precision, good surface quality and simple and reliable casting process.

The invention belongs to the field of white tea processing, and relates to a method for making imperial white tea. The method comprises the following steps: cleaning fresh leaves, airing, performing pile fermentation, baking, increasing aroma with steam, cooling and baking, and packaging. The product disclosed by the invention has high-quality style characteristics of strong, stiff and dense shape strips, silvery white and bright color, neatness, cleanliness, internal pekoe flavor or scented flavor, lasting aroma, fresh and mellow property, apricot yellow and clear soup, tender, soft and bright tea dregs and the like.

The invention relates to an energy-saving environmentally-friendly reduction converter. The converter comprises a converter body, a reduction device, a cooling device, an air generation device, an air heating device and a bracket, wherein the converter body comprises a fan and an air flue; the converter body, the reduction device and the cooling device are vertically arranged from top to bottom on the same axis; a motor I drives a rotary platform to enable the converter body to rotate; a motor II and a motor III respectively drive a reduction disk and a cooling disk to rotate, so that reduction and cooling speeds are high, and reduction and cooling efficiencies are high; and a sand seal, a liquid seal and a fire-resistant heat insulation layer are adopted, thereby reducing heat loss and greatly saving energy.

The invention discloses an alcaligenes and its application to the treatment of chromium-containing wastewater. The strain is Alcaligenes sp.GTM2, and the strain is preserved in the General Microorganism Center of China Microbial Strain Preservation Management Committee, and the preservation place is Beijing Institute of Microbiology, Chinese Academy of Sciences, No. 1, Courtyard 1, Beichen West Road, Chaoyang District. The preservation registration number is CGMCC No. 12347, and the preservation date is April 15, 2016. Alcaligenes GTM2 provided by the present invention has a reduction effect on hexavalent chromium: it is reduced from 1000mg / L to 110mg / L within 24h, and the reduction rate is 89%; Direct dosing of 1% Alcaligenes sp.GTM2 bacteria has a strong reduction ability, and the reduction rate is about 28-56%. Therefore, it can be used for the restoration of chromium-polluted water bodies, which can promote the conversion of available chromium to unusable chromium, reduce Chromium toxicity.

The invention discloses a preparation method of a meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material. The method comprises the following steps: 1) dissolving a surfactant in ethanol, and sequentially adding an ethanol solution of a copper-containing compound and deionized water while stirring, then adding a titanium-containing compound, continuously performing stirring for 30-50 s, standing the obtained solution to settle, and filtering the solution to obtain a precipitate; and 2) washing the precipitate with ethanol and / or water for 3 times or more, drying and grinding the washed precipitate to form a powder, hydrothermally reacting the powder, calcining a product obtained by the hydrothermal reaction in an air atmosphere, and carrying out high-temperature nitridingtreatment to obtain the meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material. The prepared microsphere photocatalytic material has uniform pores, good material dispersibility, large specific surface area and high photocatalytic efficiency.

The invention relates to a production process of a soft copper-clad steel wire. The production process of the soft copper-clad steel wire successively comprises the steps of drawing, high-temperature tempering, electro-deposition pretreatment, acid electrolyzation, washing, pretreatment electro-deposition, washing, thick processing electro-deposition, washing, anti-oxidation, drying, drawing, washing, anti-oxidation treatment and ammonia-decomposition high-temperature tempering. The production process of the soft copper-clad steel wire has the advantages that the elongation rate of the copper-clad steel wire is greater than or equal to 10%, which is more than one time of the elongation rate of the copper-clad steel wire produced by a traditional tempering process.

The method for preparing thin film of cobalt silicide includes steps: first, depositing Ti, Co, TiN in sequence on silicon base plate; next, carrying out short annealing in N2; then, carrying out selected etching in liquor tank of containing APM and SPM respectively; finally, carrying out second short annealing in N2. Thin film of cobalt silicide prepared by the disclosed method possesses advantages of less defect density on film, better heat stability, silicide and silicon matched to crystal lattice on substrate well so as to have more flattening interface, and reduced leakage current of PN junction.

The invention discloses a functionalized graphene / polyaniline composite filter membrane and a preparation method thereof, and aims to provide a membrane material used for water treatment. The grapheneoxide / polyaniline composite membrane comprises a matrix, functionalized graphene oxide and polyaniline grafted on the surface of a functionalized graphene oxide membrane. The preparation method comprises the following steps: functionalizing the graphene oxide, preparing a membrane on the matrix, immersing the matrix with the membrane in a mixed acid solution of aniline and ammonium persulfate, performing a reaction for a certain time, taking out the obtained material, and removing the polyaniline on the surface to obtain the functionalized graphene oxide / polyaniline composite filter membrane.The functionalized graphene oxide / polyaniline composite filter membrane has the advantages of simple preparation process, low cost and good purification effect.

The invention discloses a preparation method of a copper-silver-loaded few-layer graphene-based composite material, which comprises the following steps: S1, taking graphite powder, absolute ethyl alcohol, cyclohexane, anhydrous cupric sulfate, Tween 80, span 80, PVP and deionized water as raw materials, and uniformly mixing through vortex to prepare a uniform and stable graphite water-in-oil emulsion; s2, performing low-temperature freezing on the graphite water-in-oil emulsion prepared in the step S1 for 2 hours, and then performing ultrasonic treatment for 2 hours; s3, sodium borohydride is added into the graphite water-in-oil emulsion treated in the step S2, then low-temperature freezing is conducted for 2 h, and then ultrasonic treatment is conducted for 2 h; and S4, adding a 2% PVP aqueous solution containing silver nitrate into the graphite water-in-oil emulsion treated in the step S3, performing low-temperature freezing for 2 hours, and performing ultrasonic treatment for 2 hours to obtain the few-layer graphene-based composite material CuxO / Ag-coated FLG. The preparation method is simple in synthesis process and high in yield. The hydrogen peroxide sensor prepared from the few-layer graphene-based composite material CuxO / Ag-coated FLG is excellent in sensing performance.

The invention relates to a common sow thistle tea making method capable of removing harmful matter. The common sow thistle tea making method comprises the following steps of 1, fresh leaf washing, 2, pesticide removal, 3, fixation, 4, fermentation, 5, spread cooling, 6, baking, 7, aroma increase, 8, high-temperature steaming and 9, cooling and baking. After common sow thistle leaves subjected to the step 8 are subjected to forming or bulk packaging, the common sow thistle leaves enter a cooling room to be baked, the temperature is controlled to range from 18 DEG C to 28 DEG C, baking and cooling are carried out for 20-25 days, and then quality testing and warehousing are carried out. The common sow thistle tea making method has the advantages that many tedious toxin removal methods for tea trees, tea gardens and the like can be omitted, the pesticide residues of dry tea can be successfully removed, and after detection of a tea pesticide residue tachymeter, the tea exporting standard is completely met; a reducing function is further achieved, the foreign taste of the dry tea can be removed, commercial application is achieved, much labor force is saved, the effect and efficiency are remarkable, and the method is suitable for green tea, black tea, white tea, oolong and the like.

The invention relates to the field of uranium mine radioactive pollution treatment, in particular to enterobacter cloacae and application thereof. The collection number of the enterobacter cloacae is CGMCC (China General Microbiological Culture Collection Center) NO: The enterobacter cloacae is applied to uranium element reduction and uranium ore slag pollution treatment. The invention provides a preparation method of active bacterial liquid, which comprises the following steps: inoculating enterobacter cloacae into a liquid culture medium, standing and culturing to obtain a basic active bacterial agent; and inoculating the basic active bacterial agent into a fermentation medium according to an inoculation amount of 2-5%, and carrying out shake culture, so that the number of cells in each milliliter of the fermentation medium is not less than 3 * 10 < 9 >-5 * 10 < 9 >, thereby obtaining the active bacterial liquid. The strain has a reduction effect on uranium in tailings, uranium is converted into a reduction state which is not easy to dissolve from an oxidation state which is easy to dissolve, and the uranium is fixed in situ, so that the risk of migration to the external environment is reduced, and uranium pollution is inhibited from the source.

The invention relates to a forging technology for square steel. The forging technology for the square steel comprises the following steps of 1), making a square steel heating curve graph, wherein the abscissa of the square steel heating curve graph represents the heating time and the ordinate of the square steel heating curve graph represents the heating temperature; 2), heating the square steel according to the square steel heating curve graph obtained in the step 1); and 3), performing upsetting and drawing-out treatment on the heated square steel. The forging technology for the square steel is high in technology precision and good in surface quality, and the casting technology is simple and reliable.

The invention discloses a sprinkler filter core and a preparation method thereof, and belongs to the technical field of articles for daily use. The sprinkler filter core is mainly prepared from the following components in parts by weight: 45 to 55 parts of vitamin C, 8 to 12 parts of collagen and 10 to 13 parts of plant essential oil. According to the sprinkler filter core disclosed by the invention, the dechlorination effect is better and can be up to 99.9 percent, so that the water quality is better; the sprinkler filter core is high temperature-resistant and can be used at a temperature which is up to 80 DEG C; the sprinkler filter core is capable of washing skin, controlling grease, removing freckles, whitening the skin, protecting the skin, protecting hairs, relieving the stress and the like during bath time; the preparation method of the sprinkler filter core is simple in technology, convenient to prepare and lower in production cost.

The present invention provides a sintering method for injection-molded copper-based parts, which includes the following steps: (1) selecting copper alloy powder and binder, and making copper alloy powder and binder according to a preset volume ratio into a feed (2) Put the feed material on the copper alloy powder injection machine to form an injection blank, and use an organic solvent to remove part of the binder from the injection blank to form a degreased blank; (3) Put the degreased blank in a vacuum atmosphere for sintering (4) Introduce gas, degrease at low temperature, and sinter at high temperature to make a sintered billet. In the method of the present invention, the hydrogen gas is passed through the low-temperature section to avoid the reaction between the hydrogen gas and the graphite contained in the sintering furnace, the degreasing is more complete, and the oxygen content of the copper alloy powder particles is reduced, the activity is increased, and it is more conducive to sintering; The argon gas flow in the section avoids the volatilization of the alloy components in the copper alloy powder, avoids the pollution of the sintering furnace and the change of the material components.