30results about How to "The process is simple and scientific" patented technology

The invention discloses a coating process for a pipeline three-layer structural anticorrosive coating. The coating process comprises the following steps of: 1) performing fusion bonded epoxy (FBE) coating, namely heating a coated substrate, and spraying epoxy powder to the surface of the coated substrate by an electrostatic spraying process to melt an epoxy powder coating and cure the epoxy powder coating into a bottom coating; 2) performing air dielectric (AD) coating, namely coating adhesive powder to the surface of the coated substrate during gelling of the epoxy powder, wherein the surface temperature of the coated substrate is between 170 and 225 DEG C, and the coating thickness is between 80 and 350 mu m; and 3) performing polyolefin coating, namely winding a fabricated polyolefin coil strip on the coated substrate before an adhesive is cooled, wherein the coating thickness is between 0.5 and 4.0mm. By the AD powder coating process, the wound coating is tightly adhered to the substrate, and the anticorrosive coating has high integrity, cathodic disbonding resistance and compactness.

An anti-viral capsule for suppressing viruses, especially for treating early cold or influenza is prepared from the concentrated extract of isatis root decoction and coarse powder of coptis root through proportioal mixing, baking, sieving and capsulizing. Its advantages are high curative effect, short course of treatment and low cost.

The invention discloses a method for separating scandium from bayan obo tailings, which belongs to the field of mineral separation. The method takes the bayan obo tailings are raw materials and comprises the following steps of: grading the raw materials; grinding obtained coarse granular ores, and then returning and grading the ground ores; carrying out size mixing on fine granular ores, then performing low intensity magnetic separation on the fine granular ores to form a closed circuit grinding process; performing floatation on the selected tailings subjected to the low intensity magnetic separation; and then carrying out high intensity magnetic separation on ore pulp of the tailings subjected to the flotation, thus obtaining non-magnetic ores which are the concentrated scandium. According to the method disclosed by the invention, the fractionation and mineral separation method is adopted, the technology is simple and scientific, the concentrated scandium with the content of scandium oxide being more than 420ppm and the recovery rate being more than 65% can be obtained, and other recyclable resources in the bayan obo tailings can be further concentrated when the concentrated scandium is obtained.

The invention discloses method for extracting white carbon black from mine tailing. According to the invention, Bayan Obo mine tailing is adopted as a raw material for leaching and extracting silicon for preparing white carbon black. The invention belongs to the field of chemical engineering. According to the invention, grinded mine tailing and an alkali metal hydroxide are mixed according to a ratio of 1.0:2.0-3.0:1.0; the mixture is roasted under a temperature of 600-750 DEG C; the roasted mine tailings is soaked by using water, and is washed to neutral; the washing liquid is adopted as a mother liquor, and white carbon black is prepared with a precipitation method. The process provided by the invention is simple and scientific. With the method, silicon can be leached and extracted from Bayan Obo mine tailing highly efficiently, and can be used for preparing white carbon black. A silicon leaching rate is no lower than 75%. The prepared white carbon black satisfies a national standard. Also, other byproducts can be recovered during the process. Therefore, with the method, Bayan Obo mine tailing can be comprehensively utilized.

A commutator with cold-pressed end face is made up of circular copper wire through cutting, cold pressing, cleaning, shaping, turning, milling slot and bending. Its advantages are simple technology, no spark and noise generation, and long service life.

A concentrated jerusalem artichoke juice is prepared from the tuber of jerusalem artichoke through washing, slitting, adding citric acid, water bath at 80-100 deg.C, squeezing to obtain raw juice, using phosphoric acid to regulate pH=2-4, water bath at 75-90 deg.c, using lime milk to regulate pH=11-13, water bath at 50-60 deg.C, using phosphoric acid to regulate pH=6.5-7, filtering, and vacuum concentrating.

The invention discloses a preparation method of a saxitoxin molecularly-imprinted nano fluorescent material and an application. The preparation method comprises the steps of taking saxitoxin as a template molecule and adding a quantum dot fluorescent nanomaterial; and initializing polymerization in the presence of a cross-linking agent tetraethylortho silicate and a functional monomer 3-aminopropyltriethoxysilane or 3-(tri(trimethsilyl)silyl)propyl methacrylate, and then removing the template molecule in the obtained polymer by adopting an ultrasonic-assisted extraction method to obtain the saxitoxin molecularly-imprinted nano fluorescent material capable of specifically identifying the saxitoxin. The saxitoxin molecularly-imprinted nano fluorescent material can be used for detecting the content of the saxitoxin in a shell sample, and has the advantages of uniform particle sizes, good selectivity and excellent fluorescent stability; and fast and high-sensitivity detection of the saxitoxin in the shell sample can be achieved.

The invention discloses a method for adding a layer of preservative film on a packaging material and an article. Cyclopropene is used as an active ingredient, and the preparation method comprises thefollowing steps: adding encapsulated or adsorbed cyclopropene into a high polymer material which can be dissolved in absolute ethyl alcohol or an organic solvent according to a ratio of 1-10% by usingan encapsulating agent or an adsorbent, conducting uniform stirring to prepare a liquid, and directly spraying or brushing the liquid on a packaging material and an article to form a layer of preservative film, so as to enable the packaging material and the article have a fresh-keeping function. The method is simple and scientific in process, and 1-MCP gas is almost not lost. The fresh-keeping material is relatively stable under a drying condition and can be stored for a long time. When wet air is encountered, 1-MCP can be slowly released to keep fruits, vegetables and flowers fresh, the effect is reliable, and application is convenient.

The invention discloses a method for extracting fuels by utilizing waste oil bags, waste throwaway and waste plastics, comprising the steps of: 1) adding raw materials like the waste oil bag and the waste throwaway into a reaction kettle; adding a depolymerizing agent and a decomposition agent along with the raw materials into the reaction kettle with the added amount thereof being 4%-5% of the mass of the raw materials; adding a catalyst into a catalytic device of a catalytic reaction tower; 2) heating for 1-2 hours and controlling the heating-up speed in the range from 150 to 250 DEG C / hour; 3) continuously heating and controlling the temperature in the range from 250 to 450 DEG C, causing water vapor to start flowing out via a condenser and enter an oil-water separator; catalyzing and modifying a reaction cracking gas via the catalyst to obtain liquid oil products and gaseous products via the condenser, and fractionating the liquid oil products to obtain gasoline and diesel; collecting, storing and recycling the gaseous products until a few residues are mainly residual oil and soil mixtures; 4) cleaning the reaction kettle, repeating the contents in the step 1); the method is simple in processes, environment-friendly and remarkable in economical benefits.

The invention provides a potassium feldspar tailing utilizing method. The potassium feldspar tailing utilizing method comprises the following steps that 1, tailing fine materials are collected after being washed through water, put into a sedimentation tank to be uniformly stirred and then subjected to sedimentation through flocculating agents; 2, the tailing fine materials subjected to sedimentation are put into a 15000-gauss high magnetic separator, and the fine materials containing iron minerals are recycled through magnetic separation; 3, the separated iron mineral fine materials are put into the 1500-gauss high magnetic separator again, and iron concentrate materials are obtained through high magnetic separation; and 4, after magnetic separation is completed, residues are compressed through a ceramic filter, containing water is filtered out, and residual mineral fine materials capable of serving as phosphorus potassium fertilizers or building materials are obtained. According to the potassium feldspar tailing utilizing method, after mineral separation of potassium feldspar is completed, the tailing waste materials can be sufficiently used, so that pollution reduction and natural resource protection are facilitated.

The invention discloses a TiZrMnFe quaternary getter alloy material and a preparation method and application thereof. The chemical formula of the TiZrMnFe quaternary getter alloy material is TixZr1-xMnFe (x is equal to 0-0.4), and the TiZrMnFe quaternary getter alloy material is specifically composed of, by mass, 2.3 wt%-10.4 wt% of titanium, 29.6 wt% to 41.6 wt% of zirconium; 27.8 wt% to 29.8 wt%of manganese; and 28.0 wt% to 30.3 wt% of iron. The crystal form of the TiZrMnFe quaternary getter alloy material is a C14 type laves crystal structure, and the grain size of the TiZrMnFe quaternarygetter alloy material is 20 microns to 50 microns. The preparation method comprises the steps that Ti, Zr, Mn and Fe pure metal with a certain stoichiometric ratio is weighed, proportioned and smeltedto obtain an alloy ingot, heat treatment is conducted, and the alloy ingot obtained after heat treatment is subjected to crushing, ball milling and sieving to be prepared into TiZrMnFe air suction alloy powder with different particle sizes. The alloy powder is pressed into getter products in various shapes through a cold press, or alloy powder adsorption slurry is brushed on the surface of a device through an adhesive. The preparation process is simple and feasible, the nitrogen adsorption capacity of the getter per unit mass is high and is superior to that of a ternary ZrMnFe alloy, and thepreparation cost is low.

The invention relates to the technical field of medical treatment, and in particular relates to a peripheral blood culture medium and a preparation method thereof. The peripheral blood culture mediumis prepared by reasonable process steps with common RPMI 1640, deionized water, penicillin, streptomycin, a sodium hydrogen carbonate solution, colchicine, bovine serum and phytohemagglutinin as majorraw materials. In addition, the peripheral blood culture medium and the preparation method thereof have the advantages of reasonable process design, simple and scientific process, and relatively lowcost of preparation process, and are suitable for popularization and use.

The invention discloses a method for purifying smelting furnace gas of a submerged arc furnace. The method comprises the following steps that (1) cold air is mixed into the generated furnace gas through a water cooling flue, and carbonic oxide gas is preliminarily combusted; (2) the temperature of the furnace gas obtained after the carbonic oxide gas is preliminarily combusted is raised to range from 300 DEG C to 320 DEG C, the furnace gas enters a combustion settling chamber, the flow speed of the furnace gas is reduced, large-particle dust carried in the furnace gas settles, cold air is mixed properly, and finally the carbonic oxide gas is thoroughly burnt out; (3) the temperature of the furnace gas with the carbonic oxide gas burnt out is fast reduced to range from -4 DEG C to 0 DEG C through a condenser, and condensed furnace gas liquid is collected; (4) the temperature of the non-condensed furnace gas in the step (3) is reduced to range from 100 DEG C to 105 DEG C, and the furnace gas enters a bag-type dust remover and is discharged into the air after dust removal; and (5) the condensed furnace gas liquid is recycled after being purified by ozone generated by an ozone generator. According to the method, the process is simple and scientific, the remarkable purification effect is achieved on the furnace gas generated by the submerged arc furnace, environment pollution is effectively reduced, and the method is suitable for being utilized and popularized within a wide range.

The invention provides a traditional Chinese medicine for treating vulvar leukoplakia and a preparation method thereof and belongs to the field of traditional Chinese medicine preparation techniques. The traditional Chinese medicine is prepared by using natural Chinese herbal medicines as raw material. The traditional Chinese medicine is characterized by comprising 30g of sophora flavescens, 30g of common cnidium fruit, 30g of rhizoma atractylodis, 20g of belvedere fruit, 20g of folium isatidis, 20g of astragalus membranaceus, 20g of blackberrylily rhizome, 20g of angelica, 20g of salvia miltiorrhiza, and 20g of schizonepeta. The preparation method includes: well mixing the Chinese herbal medicines according to a weight ratio, grinding into powder of 1-100 micrometers and packing with 10g per bag. Application of the traditional Chinese medicine includes: taking 10g to put into a cup, soaking with boiled water for 10 minutes, pouring into a basin, adding 1500ml warm water at 35-40 DEG C, hip bathing for 10-15 minutes, wetting gauze with the medicine for partial hot applying for 10-15 minutes, and slowly rubbing. The traditional Chinese medicine is applied 1-2 times a day for four weeks as a treatment course. Two treatment courses are needed to treat the vulvar leukoplakia. The traditional Chinese medicine for treating vulvar leukoplakia has the functions of clearing heat and itching relieving, promoting blood circulation to remove blood stasis and antisepsis and anti-inflammation; is convenient to prepare and use, lasting in medicine effect, free of side effects; and has rich raw material source, and is ideal therapeutic for treating vulvar leukoplakia.

A commutator with cold-pressed end face is made up of circular copper wire through cutting, cold pressing, cleaning, shaping, turning, milling slot and bending. Its advantages are simple technology, no spark and noise generation, and long service life.

The invention discloses a preparation method of a saxitoxin molecularly-imprinted nano fluorescent material and an application. The preparation method comprises the steps of taking saxitoxin as a template molecule and adding a quantum dot fluorescent nanomaterial; and initializing polymerization in the presence of a cross-linking agent tetraethylortho silicate and a functional monomer 3-aminopropyltriethoxysilane or 3-(tri(trimethsilyl)silyl)propyl methacrylate, and then removing the template molecule in the obtained polymer by adopting an ultrasonic-assisted extraction method to obtain the saxitoxin molecularly-imprinted nano fluorescent material capable of specifically identifying the saxitoxin. The saxitoxin molecularly-imprinted nano fluorescent material can be used for detecting the content of the saxitoxin in a shell sample, and has the advantages of uniform particle sizes, good selectivity and excellent fluorescent stability; and fast and high-sensitivity detection of the saxitoxin in the shell sample can be achieved.

The invention discloses black bean nutritional health food which is prepared from the following raw materials in parts by weight: 5-8 parts of black sesame, 40-60 parts of black beans, 10-18 parts offresh corn, 20-24 parts of brown rice, 4-8 parts of red dates, 8-12 parts of lean meat, 3-5 parts of table salt, 10-18 parts of gingko nuts, 8-15 parts of lotus root powder, 6-8 parts of walnut kernels, 6-10 parts of pollen, 4-8 parts of sea buckthorn, 6-10 parts of figs, 14-18 parts of fish meat, 4-8 parts of green tea, 10-18 parts of spirulina and 450-520 parts of pork ribs soup. A formula of the black bean nutritional health food is reasonable, the main raw materials are common, the price is moderate, the production process is simple and scientific, and a produced product is rich in nutrition, can be directly eaten or drunk by brewing with water, and is the product which is economical and has health care and nutritional functions.

The invention belongs to the technical field of ecological environmental protection, desert sand and bulk solid waste resource utilization and saline-alkali soil treatment and utilization, and particularly relates to artificial soil for treating saline-alkali soil and a use method of the artificial soil. A guiding idea of changing'improvement 'into'treatment' is provided, various bulk coal-based solid wastes, desert sand, waste sandy soil and other various suitable materials are used for producing artificial soil with good quality through an artificial means, saline-alkali soil which is not suitable for plant growth is replaced or mixed with the saline-alkali soil, and a soil structure with planting capacity, water and fertilizer retention capacity and sufficient nutrient substances is formed. According to the technical route, planting profit of the upper artificial land is not delayed, meanwhile, the original saline-alkali soil on the lower portion is provided with the rest time, many difficulties and defects in the existing saline-alkali soil improvement process can be avoided, for example, the scale is small, and repeated salinization is prone to occurring. The saline-alkali soil treatment method can give consideration to solid waste treatment, ecological restoration and economic value-added benefits, and has a good application prospect.

The invention discloses a preparation method of pre-packaged seasoning for steamed chicken with chili sauce, and solves the problems of complicated preparation and different mouthfeel of the steamed chicken with chili sauce. The pre-packaged seasoning for the steamed chicken with chili sauce comprises a sauce bag and an oil bag, wherein the sauce bag is prepared by the steps of preparing raw materials; respectively cutting matsutake, fermented soya beans, peanuts, fresh ginger and garlic into small particles; cutting green onion into small sections for later use; heating rapeseed oil; adding the matsutake particles, fermented soya bean particles, peanut particles, fresh ginger particles, garlic particles and green onion sections; performing stir-frying until fragrance is given out; addingoyster sauce, lemon juice, table vinegar, light soy sauce, table salt and water; performing boiling to the boiling state; turning off the fire; adding D-sodium erythorbate; performing uniform mixing,natural cooling and packaging to obtain the sauce bag. The oil bag is prepared by the steps of preparing raw materials; uniformly mixing sesame oil, peanut oil, red oil, pepper oil and olive oil; performing packaging to obtain the oil bag. The process is simple and scientific; the operation is simple and convenient.

Belonging to the field of food processing, the invention discloses a natural black bean health food. The natural black bean health food is prepared from the following raw materials by weight: 20-40 parts of black bean powder, 15-30 parts of aloe vera whole leaf freeze-dried powder, 20-30 parts of astaxanthin, 10-30 parts of water-soluble pearl powder and 10-30 parts of sugar. The natural black bean health food provided by the invention has the characteristics of reasonable formula, common main raw materials, moderate price, and simple and scientific making process, the produced product has very rich nutrition, has the functions of defying aging, maintaining beauty and keeping young, removing toxin and the like, can be used directly or dissolved in water for drinking, and is a economical product with health care and nutritious functions.

The invention relates to the technical field of traditional Chinese medicine health care, and particularly discloses a formula of a health care product for regulating immunity and a Chinese patent medicine as well as a production method. The health care product is prepared from raw materials in parts by weight: 5-15 parts of dendrobium nobile, 10-20 parts of cassia bark, 10-20 parts of almonds, 5-15 parts of selfheal, 10-20 parts of rhizoma chuanxiong, 5-15 parts of glossy privet fruits, 10-25 parts of radix angelicae sinensis, and 1-10 parts of rhubarb. The preparation method comprises the following steps: weighing the raw materials, then mashing the raw materials together, putting the mashed raw materials into a reaction tank, and then pouring pure water into the reaction tank, and cooling the raw materials to normal temperature after pressurized boiling; adding dichloroethane to the reaction tank, carrying out joint reflux stirring with airtight ultrasonic for about four hours, cooling the obtained material to 30 DEG C after stirring and performing filtration; and adding dichloroethane to a filtrate for extraction to obtain an extract, and performing desolvation to obtain a stock solution of the traditional Chinese medicine health care product. The traditional Chinese medicine health care overcomes the defects of the prior art, edible and medicinal plants and traditional Chinese medicinal materials which can be used in health foods are adopted and refined through a scientific formula, and purpose of strengthening the body and curing diseases is achieved by scavenging free radicals of the human body and regulating the immune function of the body.

The invention discloses a method for manufacturing a signal measurement and control cable and belongs to the technical field of cables. The method includes the following steps that an expanded polyethylene insulating material is extruded and wrapped on the outside of a tinned copper wire to form an insulated wire serving as a control line, an expanded polyethylene insulating layer is extruded and wrapped on the outside of a tinned copper conductor, an aluminum plastic composite strip layer is wrapped on the insulating layer to form an insulated wire serving as a power line, the expanded polyethylene insulating material is extruded and wrapped on the outside of the tinned copper wire to form an insulated wire serving as a signal line, the control line, the power line and the signal line are stranded to form a cable core, a mica tape, a glass fiber cloth and a woven copper wire shielding layer are sequentially wrapped on the cable core, and a protecting jacket is extruded and wrapped on the cable core. The method for manufacturing the signal measurement and control cable has the advantages that the method is scientific and simple, the cable is compact, reasonable and simple, the tinned copper wire is used for the conductor, the stability of transmission performance of the cable is guaranteed, the expanded polyethylene insulating material is used for internal insulation, low capacitance, low attenuation and resistance to intense electromagnetic interference of the cable can be achieved, an audio signal and a digital signal can be simultaneously transmitted, and the requirement of simultaneously transmitting same signals by the cable can be met.

The invention discloses a dust treatment method adopted during smelting of a submerged arc furnace. The dust treatment method comprises the following steps that (1) a dust collecting hood is adopted for hooding an area needing dust collection; (2) furnace gas is sucked into a water cooling flue through an air blower, cold air is mixed in the furnace gas, and carbonic oxide gas is preliminarily combusted; (3) the furnace gas enters a next water cooling flue, multiple paths of compressed air flow are sprayed out, and dust particles contained in the furnace gas are in a suspended state; (4) the furnace gas enters a combustion settling chamber, the temperature is raised to range from 400 DEG C to 450 DEG C, the flow speed of the furnace gas is reduced, large-particle dust carried in the furnace gas settles, cold air is mixed properly, and the carbonic oxide gas is thoroughly burnt out; and (5) the furnace gas enters a next combustion settling chamber, the interior of the combustion settling chamber communicates with a negative-pressure pipeline, and the dust particles in the suspended state in the combustion settling chamber are sucked into a collection device through negative-pressure air flow passing through the negative-pressure pipeline. According to the dust treatment method, the process is simple and scientific, the remarkable purification and dust removal effects are achieved on dust generated in the furnace gas of the submerged arc furnace, environment pollution is effectively reduced, and the dust treatment method is suitable for being utilized and popularized within a wide range.

The invention relates to a method for preparing silica sol. The method for preparing the silica sol is characterized by comprising the following steps of (1), using a Bayan obo tailing as a raw material, leaching the Baiyunebo tailing by using an inorganic acid, and filtering an obtained mixture to obtain an acid-leached solution and an acid-leached residue; (2), roasting the acid-leached residue for 2h to 6h in a condition of 500 DEG C to 900 DEG C to obtain roasted ore; (3), under the regulation of a regulating agent, slowly adding the roasted ore into a sodium hydroxide solution with mass concentration of 5 to 15 percent, wherein the mass ratio of the roasted ore to the sodium hydroxide solution is 1: 0.3 to 1: 1, a reaction temperature is 60 DEG C to 100 DEG C, a reaction time is 2h to 8h, and a stirring speed is 20gama / min. The prepared silica sol has the advantages that the raw material is the acid-leached residue obtained by carrying out acid leaching on the Bayan obo tailing; silicon content is high; impurities are less; the prepared silica sol is high in purity; a process is scientific and simple; the cost is low; the recovery rate of silicon is up to 95 percent or above 95 percent; no three wastes are generated in a production procedure; meanwhile, rare earth in the tailing can be recovered. The method for preparing the silica sol is not only applicable to the Bayan obo tailing, is but also applicable for other ore deposits with higher silicon content.

The invention relates to the technical field of emulsifiers, and particularly, relates to a special emulsifier for a papermaking sizing agent. The special emulsifier comprises the following raw materials in parts by weight: 40 to 60 parts of sodium aliphatate, 25 to 40 parts of ethylenediamine, 10 to 20 parts of alkenyl succinic anhydride, 5 to 15 parts of epoxy chloropropane, 20 to 30 parts of triethylamine, 3 to 12 parts of fatty alcohol-polyoxyethylene ether and 20 to 30 parts of lauryl sodium sulfate. The emulsifier produced by adopting the formula and the process is scientific and simplein formula, concise in preparation process and good in emulsifying effect, and the binding power of paper can be improved, so that the paper has wear resistance, acid and alkali resistance and water resistance, and is high in functionality.

The invention discloses a method for improving rural sewage treatment. The method for improving rural sewage treatment is simple and scientific in process, and low-cost and high-efficiency filtrationand purification of rural sewage are finally realized through primary filtration, precipitation, aeration, secondary filtration and secondary precipitation and filtration of a biological tank on the rural sewage. In conclusion, the method for improving rural sewage treatment is stable and reliable, and related sewage treatment equipment is small in occupied area, easy to construct, simple and convenient to maintain, low in capital construction investment and low in operation cost; the damage to the ecological environment and the generation of black and odorous water are avoided, the rural sewage treatment effect is stable, the operation cost is relatively low, the rural sewage is comprehensively utilized to the maximum extent through a reasonable sewage treatment method, and the method issuitable for popularization and application.

A concentrated jerusalem artichoke juice is prepared from the tuber of jerusalem artichoke through washing, slitting, adding citric acid, water bath at 80-100 deg.C, squeezing to obtain raw juice, using phosphoric acid to regulate pH=2-4, water bath at 75-90 deg.c, using lime milk to regulate pH=11-13, water bath at 50-60 deg.C, using phosphoric acid to regulate pH=6.5-7, filtering, and vacuum concentrating.

The invention discloses a preparation process for a high-strength heat-dissipating aluminum alloy wheel hub material for an automobile. The process includes the following steps: 1) weighing raw materials according to parts by weight for standby application; 2) putting zinc, copper, iron, aluminum and epoxy resin into a crucible of a vacuum melting furnace, performing vacuumizing to 7.2x10<-2>Pa, starting heating, after the temperature rises to 945-965 DEG C, stopping vacuumizing, and introducing inert gas into the vacuum melting furnace to 5x10<4>Pa; and continuing to heat to 1300-1350 DEG C,after the zinc, copper, iron, aluminum and epoxy resin are completely dissolved, adding high color carbon black, performing stirring for 30-40 min at a constant temperature, and cooling the alloy liquid to obtain intermediate alloy; and other steps. The preparation process provided by the invention is simple and scientific, and the components and contents used in the process are configured reasonably to ensure that the aluminum alloy has sufficient mechanical properties, excellent heat dissipation performance, high strength, and wear resistance, especially mechanical properties suitable for heavy-load high-temperature use environment.

The invention discloses a method for separating scandium from bayan obo tailings, which belongs to the field of mineral separation. The method takes the bayan obo tailings are raw materials and comprises the following steps of: grading the raw materials; grinding obtained coarse granular ores, and then returning and grading the ground ores; carrying out size mixing on fine granular ores, then performing low intensity magnetic separation on the fine granular ores to form a closed circuit grinding process; performing floatation on the selected tailings subjected to the low intensity magnetic separation; and then carrying out high intensity magnetic separation on ore pulp of the tailings subjected to the flotation, thus obtaining non-magnetic ores which are the concentrated scandium. According to the method disclosed by the invention, the fractionation and mineral separation method is adopted, the technology is simple and scientific, the concentrated scandium with the content of scandium oxide being more than 420ppm and the recovery rate being more than 65% can be obtained, and other recyclable resources in the bayan obo tailings can be further concentrated when the concentrated scandium is obtained.