955results about How to "Reduce add" patented technology

The present invention relates to an optical fiber having a structure suitable for long-distance optical communications, and an optical transmission line including the same. The optical fiber in accordance with the present invention comprises a core region extending along a predetermined axis, and a cladding region disposed so as to surround the outer periphery of the core region; and, as characteristics at a wavelength of 1.55 mum, an effective area of at least 110 mum<2>, a dispersion of 18 to 23 ps / nm / km, and a dispersion slope of 0.058 to 0.066 ps / nm<2> / km.

To provide a radiation-curable composition which can provide a cured product capable of sufficiently satisfying all of light resistance, transparency and curability and therefore can be useful in much more applications in addition to optical members, lighting members, and automobile members. A radiation-curable composition used after cured by radiation energy, wherein a cured product produced by curing the curable composition by radiation energy of 2 J / cm2 satisfies: an initial light transmittance of 80% or more at a wavelength of 380 nm, and a light transmittance retention of 90% or more after 200 hours of accelerated light resistance test.

A process is provided for producing syngas that is effective for use in downstream processes. The process for producing syngas includes operating a gasification apparatus in a start-up mode until the gasification apparatus and equipment downstream of the gasification apparatus are adequately warmed up to a first target temperature. Upon reaching a first target temperature, the process is then operated in a production mode to produce a second syngas with a higher CO / CO2 molar ratio. Operation in a start-up mode until reaching a first target temperature, provides a process that is effective for reducing fouling in downstream equipment and for providing a second syngas can be more effectively cooled and cleaned.

Printing image data is converted into image data for a proofer through a print condition conversion process for converting CMYK for printing into L*a*b*, a spot color reference process for converting a spot color name into L*a*b*, a printer condition conversion process for converting L*a*b* into RGB for proof, and a composition process for synthesizing a process color with a spot color.

A composite adsorption material for removing As from water is prepared from activated carbon and iron oxide through washing activated carbon by water, heating, drying, adding it to nitric acid, stirring, laying aside, water washing, drying, dissolving FeSO4*7H2O in water, adding it to NaOH solution, stirring to generate iron oxide deposit, using NaOH to regulate pH=9-10, water washing, adding lauric acid, dripping NaOH while stirring, heating to make pH=4-5, mixing said activated carbon with the suspension of iron oxide, and stirring. It has high capacity, selectivity, adsorptivity and mechanical strength.

The invention discloses a heavy metal-contaminated soil solidifying agent and an application method thereof. The solidifying agent comprises the following components by mass: on the basis of the dry weight of heavy metal-contaminated soil, 10 to 15% of a binding material, 5% of biochar, 10% of vegetable fiber and 1% of a stabilizing agent. The components are added according a sequence of the stabilizing agent-the biochar-the vegetable fiber-the binding material. Addition of the chemical stabilizing agent and the biochar in the process of stabilization enables heavy metals to be absorbed and passivated and to lose mobility; preparation of heavy metal-contaminated soil slurry provides conditions for a later chemical reaction; the whole processing process is free of dust pollution and discharging of unwanted sewage. Addition of the vegetable fiber enables cracking of heavy metal-contaminated soil solidified by using a conventional solidifying agent to be effectively prevented and endurance of a solidified body to be improved. The method provided by the invention has the advantages of strong operability, low cost, extensive applicability, a high resource utilization rate, low environmental risk and easy large-scale popularization.

The present invention relates to a casting technology, which, to be specific, is an invest shell casting and a method of manufacturing the invest shell casting. The invest shell casting comprises a plurality of layers of surface refractory coating, a plurality of consolidation layers of refractory coating and sand materials that is positioned between two layers of refractory coating. The present invention is characterized in that the consolidation layers of refractory coating contain wollastonite in power. Utilizing the method can easily increase strength of the invest shell casting at low cost, thereby not only ensuring required strength of the invest shell casting but also reducing layers of the coating and quantity of iron wires. Even with the method used, the iron wires do not need to be used and required strength of the invest shell casting also can be guaranteed, thereby greatly increasing efficiency of manufacturing the invest shell casting and decreasing the amount of human labor needed.

The invention provides a multifunctional inorganic thermal insulation material composition, a multifunctional inorganic thermal insulation material product prepared from the multifunctional inorganic thermal insulation material composition and a preparation method of the multifunctional inorganic thermal insulation material product. By substantially utilizing industrial and construction wastes as a gel enhancement and inorganic thermal insulation system and adding a little amount of cement as well as a proper amount of regulator, the multifunctional inorganic thermal insulation material composition is molded in a casing mode by one step, thereby forming a wall plate, a block material (wall materials decorated by wall floor tiles) and a roof. Therefore, the wall body, the block material and the roof have the multifunction and the characteristics of thermal insulation, fire prevention, water resistance, freezing resistance, crack resistance, sound insulation, light weight, corrosion resistance, weather resistance, decoration, energy conservation, environmental friendliness, safety, sanitation, work saving, time saving, cost saving and the like.

The invention relates to a preparation method of a halogen-free flame-retardant polyurethane (PU) sealant. The preparation method comprises the following steps: dewatering and drying the following materials, namely a filler, a thixotropic agent, a halogen-free flame retardant, a flame-retardant synergist, a plasticizer, a light stabilizer and an antioxidant in vacuum; stirring a PU prepolymer and the materials for dispersion in a double planet mixer with a high-speed dispersion disk or a tri-roller grinder at the temperature of 30-50 DEG C for 2-5 hours under the condition that the vacuum degree is not less than 0.092Mpa; under normal pressure and protection of high-purity nitrogen, adding a catalyst A, a silane adhesion promoter and a water scavenger, and stirring for 0.1-1 hour for dispersion; and removing small molecules and stirring for 0.3-1 hour under the condition that the vacuum degree is not less than 0.092Mpa to finally obtain the halogen-free flame-retardant PU sealant. The halogen-free flame-retardant PU sealant effectively overcomes the disadvantages of the PU sealant such as big flame, fast burning speed, severe drippage and the like in the prior art on the premise of ensuring the original physical properties of the PU sealant, thus the PU sealant has the advantages of flame retardance, no drippage during the burning process, good adhesive property and the like.

In one embodiment, a method is disclosed for producing a composite magnetic material, wherein the non-magnetic binder comprises a layered compound having an insulation property and the non-magnetic binder and soft magnetic metal powder is admixed with each other, the admixture is compacted to a desired shape, and the compact is heat-treated under predetermined condition to form a thin insulating layer made of the insulating layered compound on the surface of the soft magnetic metal powder, thereby producing the composite magnetic material having a withstand voltage of 20 V or more.

The invention discloses a preparation method for emulsion-typed soybean protein isolate, which comprises the steps as follows: pre-crushed low-temperature defatted soybean flour (DSF) is taken as raw material and mixed with deionized water with the water / material ratio of 5-20w / w, is heated to 40-60 DEG C under alkali condition and leached for 20-30min so as to lead the soybean meal to expand by absorbing water; Acalase alkaline protease is added to carry out the enzymolysis; the bottom residue is removed by centrifuging so as to obtain soybean proteolysis supernatant; furthermore, the soybean proteolysis supernatant is homogenized and acidity is adjusted to PH 4.5; the protein in the soybean proteolysis supernatant is deposited and centrifuged for 10-20min; the obtained deposition is mixed with the deionized water by the water / material ratio of 3-5w / w; the mixed solution is adjusted to neutral by adding NaOH and frozen dryly or sprayed dryly so as to obtain the emulsion-typed soybean protein isolate. The process of the invention is simple and reliable, which remarkably improves the emulsion performance of the soybean protein.

The invention belongs to the field of biotechnology, and relates to Lactobacillus acidophilus and application thereof and a feed additive thereof and a premix compound thereof. The Lactobacillus acidophilus of the invention has strong stress tolerance, and can tolerate simulated gastric fluid and simulated bile salt so as to guarantee that a great quantity of viable bacteria can smoothly enter the intestinal tract of an animal, and the viable bacteria play a probiotic role, so that the immunity of the animal is improved, and the breeding cost is reduced. The product obtained from the Lactobacillus acidophilus of the invention through culture, high-density fermentation and addition of protectant has a high content of viable Lactobacillus acidophilus, can be added as a biological feed additive in the drinking water or feed for breeding animals, and can be prepared into feed such as premix compound and so on, so as to reduce the addition of antibiotics, indeed improve the intestinal tract health and the immunity of animals, and increase the production performance of animals.

The invention discloses a lucid ganoderma substitute cultivation medium with momordica grosvenori. The lucid ganoderma substitute cultivation medium comprises, by weight, 35-70 parts of sawdust, 25-60 parts of auxiliary material, 0.5-1.5 parts of gypsum, 0.1-1 part of sugar and 1-5 parts of momordica grosvenori, and the proportion of the materials to water is 1: 1.3-1.5. By means of the lucid ganoderma substitute cultivation medium, the growth of infectious microbe can be restrained very well in the cultivating process of lucid ganoderma, and the lucid ganoderma substitute cultivation medium has an obvious effect.

A carbon fiber bicycle crank includes an axle lug, having a portion for receiving a crank axle. A foam core is coupled to the axle lug during a first molding process. A pedal engaging lug is coupled to the foam core after the completion of the first molding process, and a carbon fiber composite material exoskeleton is coupled to and disposed exteriorly of the axle lug, foam core and pedal lug.

The invention discloses a preparation method of aluminum oxide microbeads. The preparation method comprises the following steps: by adopting aluminum oxide powder with lower alpha phase conversion rate (80-90%) as a main raw material, adding a composite sintering additive, ball-milling through an intermittent ball mill and a vertical sand mill, and then performing centrifugal type spray pelletization, rolling to forming, drying, sintering in a rotary kiln, and continuous grinding and polishing, to obtain the aluminum oxide microbeads. According to the preparation method, the aluminum oxide powder with relatively low alpha phase conversion rate is adopted, activity of the remaining gamma-aluminum oxide phase in the aluminum oxide powder promotes the sintering of the aluminum oxide, the addition amount of the sintering additive is decreased, and meanwhile the problem that the aluminum oxide microbeads during the sintering of the rotary kiln are caked and collided to be deformed due to excessive glass phase can be solved. Rotary kiln sintering equipment is introduced, the microbeads are under a moving status during the sintering of the rotary kiln, and are evenly heated during sintering, thus being uniform in the structure and performances. The prepared aluminum oxide microbeads have the characteristics of being low in abrasion, high in strength and density, uniform in particle size, free from breakage of beads, and the like.

The invention relates to a preparation method of emulsified stable type soy isolate protein and belongs to the field of process technology of soy protein. The preparation method comprises the main steps as follows: preparing a soy isolate protein solution with the ratio of deionized water to soy isolate protein used as a raw material being (5-25):1 w / w; fully hydrating, and then stirring and preheating at 40-60 DEG C; regulating pH to be 6.5-7.5; adding papain for enzymolysis to obtain a sample of different hydrolysis degrees; then killing enzyme for 5 min at 90 DEG C; cooling to room temperature; regulating pH to be neutral; centrifuging; taking supernate to carry out freeze drying or spray drying; preparing a sample solution with the ratio of deionized water to the sample of different hydrolysis degrees being (5-25):1 w / w; preheating at 30-50 DEG C; regulating pH to be 7.0; adding transglutaminase to start crosslinking; after 1h, heating for 5 min at 80 DEG C to inactivate the enzyme; cooling to room temperature; then regulating pH to be neutral; centrifuging; taking supernate; and performing freeze drying or spray drying to obtain the highly emulsified stable type soy isolate protein. The preparation method for the emulsified stable type soy isolate protein is economic and effective; and the emulsion stability of the soy protein is remarkably improved.

The invention provides a low fish meal compound feed capable of improving ingestion rate of cultured weever. The compound feed consists of the following components in part by weight: 26 to 31 parts of fish meal, 2 to 10 parts of whole shrimp powder, 12 to 16 parts of soy protein concentrate, 8 to 12 parts of fermented bean pulp, 9 to 12 parts of peanut cake, 20 to 23.5 parts of strong flour, 0.8 to 1.2 parts of calcium dihydrogen phosphate, 1.5 to 2 parts of fish oil, 1 to 2 parts of bean oil, 2 parts of vitamin and mineral salt premix, 0.2 to 0.4 part of betaine, 0.3 to 0.5 part of taurine, 0.05 to 0.1 part of citric acid, 0.3 to 0.5 part of Chinese asafetida, 0.1 to 0.2 part of glycine, 0.5 to 1 part of glutamic acid, and 0.05 to 0.12 part of alanine. The low fish meal compound feed canpromote ingestion and food digestion of fish, so that the utilization rate of the feed is improved, the coefficient of the feed is reduced, and the raising cost is reduced.

Disclosed relates to a method for preparing tantalum or niobium powders used for manufacturing capacitors in an electrolytic reducing reactor including an anode, a cathode and a molten salt, the method comprising: obtaining a tantalum or niobium oxide, expressed by Ta2O(5-y) or Nb2O(5-y) where y=2.5 to 4.5, from a tantalum pentoxide Ta2O5 or a niobium pentoxide Nb2O5 generated partially by an alkaline metal electrolytically reduced via a first electrolytic reducing reaction that reduces an alkaline metal oxide from a molten salt comprising at least one metal halogen compound, selected from the group consisting of alkaline metal and alkaline earth metal, and an alkaline metal oxide on the cathode; and preparing a tantalum or niobium powder by a first electrolytic reducing reaction that reduces at least one metal halogen compound selected from the group consisting of the alkaline metal oxide and the alkaline earth metal on the cathode and by a second reducing reaction with the tantalum or niobium oxide, represented by Ta2O(5-y) or Nb2O(5-y) where y=2.5 to 4.5.

The invention discloses a method for synthesizing a nanometer Ni2O3 / Co3O4 cathode material on a copper sheet current collector through a two-step method. According to the method, a nanowire array directly grows on the current current collector matrix, so that the process treatment is greatly simplified, and an adhesive and a conductive additive are not used in the electrode. The method comprises the following steps: electroplating a nano-scale granular nickel layer on a copper matrix subjected to acid treatment to serve as a seed, generating a nano array through a hydrothermal reaction, and preparing a final product through high-temperature calcining. The proper nickel electroplating time is selected, the combination degree between the substrate and the material is improved, and the nickel is hard to drop, so that the cycling stability of the lithium ion battery is improved. Meanwhile, compared with a nickel plating-free pure Co3O4 array, the Ni2O3 / Co3O4 array has the advantages that the capacity value of unit area is improved. When the electrochemical performance is tested, the prepared cathode material reflects high charging and discharging capacity and long cycle life.

The invention discloses an organic selenium-supplementing feed additive and preparation and a using method thereof. The feed additive is prepared by the following steps of: adding chitosan with deacetylation degree of 70 to 100 percent into 0.5 to 2 volume percent of diluted acid with stirring at the temperature of between10 and 60 DEG C to obtain 0.5 to 10 percent acid solution of chitosan; adding solution of inorganic selenium into acid solution of chitosan, wherein the mass of inorganic selenium is 1 / 6 to 1 / 2 time that of the chitosan; and reacting for 1 to 12h and separating, washing the obtained solid matter by using distilled water for many times until selenium ions cannot be detected, and drying and crushing to obtain chitosan selenium chelate. The chitosan selenium serving as the feed additive is applied to feeds for livestock, poultry and aquatic animals and is effectively absorbed and utilized in the animals by using proper stability and dissolution performance thereof, so that disease resistance, production performance and meat quality of the animals are obviously improved. The chitosan selenium has the advantages of little toxicity, high biological availability, small addition amount, and capability of saving resources and protecting the environment, so that the feed additive is a safe and effective environment-friendly feed additive.

The invention discloses a breeding pollution comprehensive treatment system and method of a large-scale pig farm. The system comprises a source separation pigsty, a pigsty washing water treatment system, a solid-liquid separation system, a solid high-temperature aerobic fermentation system, a liquid high-temperature aerobic fermentation system, an odor and flue gas treatment system, a boiler system and a detection control system. The source separation pigsty is designed to be a pigsty with fecaluria separated from rainwater, pigsty washing water and drinking residual water. A sludge pump pumps the fecaluria to a solid-liquid separation device. Solids separated out from the solid-liquid separation device are conveyed to the solid high-temperature aerobic fermentation system. Liquid separated out from the solid-liquid separation device is conveyed to the liquid high-temperature aerobic fermentation system. A fermentation odor exhaust opening of the solid high-temperature aerobic fermentation system, a fermentation odor exhaust opening of the liquid high-temperature aerobic fermentation system and exhausted flue gas of the boiler system are connected with the odor and flue gas treatment system through pipelines. The boiler system comprises a boiler, a circulation pump, a hot water pipeline and a water return pipeline. Sensors of the detection control system are arranged in the above systems, and the detection control system carries out connection control over the above systems. According to the system and method, pollution of the large-scale pig farm is comprehensively treated, and zero emission, zero pollution and resourceful utilization of pollutants of the large-scale pig farm are achieved.

A first protection film (3) and a second protection film (4) are formed on an electrode pad (2). Bumps (5) are formed at sites where the deposited first and second protection films (3), (4) are both removed. The openings (3a) where the lower, first protection film (3) is removed are larger than the openings (4a) where the upper, second protection film (4) is removed, so that the upper, second protection film (4) has an overhanging structure. The bottom periphery of the bump (5) is formed to extend under the second protection film (4).

The invention relates to a preparation method of a water-soluble anion polymer-type thickened oil viscosity reducer. The thickened oil viscosity reducer comprises a component A and a component B; thecomponent A is an acrylamide copolymer containing acryloyl morpholine blocks; the component B is an acrylamide copolymer containing active end groups. A thickened oil viscosity reducer solution is mixed with thickened oil; it is proved through viscosity reduction tests that when the dosage reaches 0.2 mg / mL, the viscosity reducer can achieve high-temperature stirred emulsification and viscosity reduction in pure water and salt water, the viscosity reduction rate is greater than 93%, and stirred demulsification is stopped at room temperature. The thickened oil emulsification viscosity reducer is obvious in viscosity reduction effect and high in environmental adaptability, the emulsification and viscosity reduction behaviors of the thickened oil viscosity reducer have temperature and shearing responsiveness, and convenience is provided for application and post-treatment in oil fields.

The invention provides a method for producing an amino acid fertilizer by means of waste water and meat and bone meal generated by livestock harmless treatment, and particularly relates to a method for producing the amino acid fertilizer by hydrolyzing the organic waste water and the meat and bone meal generated due to harmless treatment of livestock died from diseases in a enzyme-acid two-step method. Firstly, the meat and bone meal and soluble protein in the organic waste water are hydrolyzed by means of trypsin, polypeptide generates small-molecule peptide chains through enzymolysis, the shielding function of side-chain radicals on peptide is weakened, the space repression effect between the side-chain radicals and the peptide is reduced, and then complete hydrolysis is carried out with dilute hydrochloric acid. The method has the advantages that the soluble protein and amino acid in the organic waste water generated due to harmless treatment of the livestock died from the diseases are fully used, and waste is turned to wealth; the hydrolyzed meat and bone meal generates a large amount of calcium, phosphorus and microelements and is chelated with the free amino acid, and addition of extra microelements, calcium and phosphorus is reduced; besides, the content of the amino acid generated by the meat and bone meal after hydrolysis is more comprehensive and balanced.

The invention discloses a method for recycling indium from waste Hg-free alkaline zinc manganese dioxide battery, which comprises the following steps: separating and extracting the cathode material from waste Hg-free alkaline zinc manganese dioxide battery, dissolving with an acid, adding a reducing agent to replace sponge indium, and smelting the sponge indium to obtain indium ingots, the filtrate being used for electrolytic zinc process; or alternatively adjusting the pH value of the solution to 5 with a base solution after acid dissolution to allow the precipitation of In(OH)3, filtering to separate the filtrate used for electrolytic zinc process and the precipitate used as electrolyte after acid dissolution, and electrolyzing to obtain pure indium. Based on the existing state of indium in the waste Hg-free alkaline zinc manganese dioxide battery and the practical recovery of waste Hg-free alkaline zinc manganese dioxide battery, the invention realizes the recycle of indium and has the advantages of simple process, easy application, high and stable recovery rate of indium, less use of chemical additives in the recycle process, no secondary pollution, and high purity of extracted metal indium. Therefore, the invention realizes the cyclic regeneration of cathode material of waste alkaline zinc manganese dioxide battery and is better in economic benefit and environment-protection value.

The invention discloses a simple method for manufacturing a ceramic-metal composite wear-resistant part. The simple method for manufacturing the ceramic-metal composite wear-resistant part is characterized by comprising the following steps of obtaining a steel wire gauze, stamping a groove in the steel wire gauze, filling ceramic particles in the groove after surface wetting treatment is conducted on the ceramic particles, taking another steel wire gauze to cover the first steel wire gauze so that the groove can be shielded and scattering of the ceramic particles can be avoided, fixing the steel wire gauze with the ceramic particles fixed on a corresponding position, need to be enhanced, of the mold cavity wear-resistant part, and pouring and casting matrix metal liquid to obtain the wear-resistant part. The simple method for manufacturing the ceramic-metal composite wear-resistant part has the advantages of being even in distribution of the ceramic particles, firm in combination with matrix metal, capable of giving full play to the characteristics of ceramic and metal and achieving high-resistant performance and high-impact-resistant performance, simple, easy and convenient to operate, capable of being produced in large scale or in batch, and low in cost.

The invention discloses a low-alloy cast steel suitable for a heavy lorry axle housing. The low-alloy cast steel comprises the following elements in percentage by mass: 0.23 to 0.33 percent of C, 0.50 to 1.00 percent of Si, 0.90 to 1.40 percent of Mn, 0.10 to 0.25 percent of Cr, 0.10 to 0.25 percent of Mo, 0.20 to 0.25 percent of V, less than or equal to 0.04 percent of P, less than or equal to 0.04 percent of S, less than or equal to 0.20 percent of residual elements, and the balance of Fe. Waste steel, pig iron, ferromanganese alloy, silicon ferromanganese alloy, ferrochromium alloy, ferromolybdenum alloy and ferrovanadium alloy are used as raw materials of the low-alloy cast steel; and the machining process of the low-alloy cast steel comprises casting and thermal treatment. The low-alloy cast steel has the advantages of high mechanical property, good low-temperature impact toughness and good casting and machining process properties, and is particularly suitable for producing the lorry axle housing.

The invention relates to an AAO continuous-flow aerobic granular sludge nitrogen and phosphorus removal process. Intake water enters a biochemical tank after passing coarse and fine screens and a primary settling tank, the biochemical tank comprises an anaerobic tank, an anoxic tank and an aerobic tank, part of effluent of the biochemical tank flows back to the front end of the anoxic tank, the other part enters a secondary sedimentation tank for mud-water separation, the secondary sedimentation tank is a dual-region sedimentation tank, light sludge is collected prior to direct concentrating, drying and outward transportation for disposal, heavy sludge is collected, then part of the heavy sludge serves as excess sludge flowing back to the front end of the anaerobic tank, the other part is dried and crushed to be put to the front end of the biochemical tank, and effluent of the secondary sedimentation tank passes a disinfection apparatus prior to up-to-standard discharge. The invention further relates to an AAO continuous-flow aerobic granular sludge nitrogen and phosphorus removal system. Granulation of aerobic sludge is promoted, carbon sources are supplemented to denitrification for promoting nitrogen removal, and biological phosphorus removal is enhanced.

The invention discloses an edible chitosan-collagen antibacterial film and a preparation method thereof. The preparation method comprises the following steps: adding collagen to water, stirring and dissolving at the thermal treatment temperature of 60 DEG C-70 DEG C, sequentially adding glycerin, dialdehyde starch and chitosan, and controlling the pH value of the solution to 5-6; carrying out thermal treatment for 10-20 minutes at the temperature of 60 DEG C-70 DEG C, placing in a stirring defoaming machine so as to remove air bubbles, then carrying out curtain coating on an organic glass plate, cooling film formation liquid, drying, cooling at a normal temperature, and stripping a film, thus obtaining the edible chitosan-collagen antibacterial film. The edible chitosan-collagen antibacterial film has particularly excellent mechanical property; when the thickness of the edible chitosan-collagen antibacterial film is 0.21mm, the tensile strength of the film reaches 2-4.11Mpa, and the elongation at break of the film reaches 130.12-172.48%; meanwhile, the edible chitosan-collagen antibacterial film has relatively good antibacterial property and is capable of prolonging the shelf life of chilled meat by 6 days.

The invention discloses lithium ion battery negative electrode conductive paste, and belongs to the field of lithium ion battery material manufacturing. The conductive paste comprises a thickening agent, a binding agent, a conductive agent, a defoaming agent, an active substance and a solvent, on the basis of 100% by mass of the conductive paste, the solid content accounts for 5-30%, and the massratio of the thickening agent, the binding agent, the defoaming agent and the active substance is (0.1-2.0):(0.5-15):(0.5-15):(0.1-5):(70-97.5). The conductive paste is an aqueous binding agent system, carboxymethyl cellulose is used as the thickening agent, and a silicon / silicon carbide / carbon compound is used as the active substance. Moreover, the invention also provides a preparation method ofthe conductive paste, a lithium ion battery negative electrode prepared by employing the conductive paste and a lithium ion battery. The half cell of the lithium ion battery, assembled by employing the negative electrode paste preparation method provided by the invention, has excellent cycle stability and initial coulombic efficiency.