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95results about How to "Moderate energy" patented technology

Film formation apparatus and film formation method and cleaning method

The purpose of the invention is to provide a film formation apparatus capable of forming an EL layer with a high purity and a high density, and a cleaning method. The invention is a formation of an EL layer with a high density by heating a substrate 10 by a heating means for heating a substrate, decreasing the pressure of a film formation chamber with a pressure decreasing means (a vacuum pump such as a turbo-molecular pump, a dry pump, or a cryopump) connected to the film formation chamber to 5×10−3 Torr (0.665 Pa) or lower, preferably 1×10−3 Torr (0.133 Pa) or lower, and carrying out film formation by depositing organic compound materials from deposition sources. In the film formation chamber, cleaning of deposition masks is carried out by plasma.
Owner:SEMICON ENERGY LAB CO LTD

Pneumatic machinery acoustic wave water area shallow layer seismic exploration continuous impact seismic source apparatus

The invention relates to a bump seismic origin device used for the seismic exploration in the shallow layer of water areas by the sound wave of a pneumatic machine, which comprises a supporting body and a pneumatic hammer on the motherboard of the supporting body, wherein, the pneumatic hammer is connected with an air compressor by an air delivering pipe; the pneumatic hammer comprises an outer shell body and a hammer head arranged in the cavity of the shell body; the lower side of the hammer head is connected with a return spring; the upper part of the hammer head is fixedly provided with a magnet; a working air chamber connected with the air delivering pipe and a magnetic substrate used for producing upward suction force for the magnet are arranged above the hammer head; the air delivering pipe is connected with a three-way electromagnetic switch valve used for controlling the air intake to the working air chamber of the pneumatic hammer or controlling the air in the working air chamber of the pneumatic hammer to be discharged outside in series; the three-way electromagnetic switch valve is connected with a control box; the motherboard of the supporting body is made of sheet metals at least at the area used for arranging the pneumatic hammer. The bump seismic origin device not only has the seismic origin of wide frequency band of good properties, fast aftershock reduction, proper energy and pulse of good properties, but also is beneficial to ocean ecology and environmental protection.
Owner:ARCHITECTURAL DESIGN INST FUKIEN PROV

Prepn. contg. composite enzyme for improving quality of tobacco

InactiveCN1692846AAccelerates the natural aging processShorten the natural aging cycleTobacco treatmentAmylaseYeast
A preparation of increasing the quality of tobacco leaf features it contains cellulase, proteinase, pectinase, amylase, beta-amylase and yeast powder. It can speed up the process of natural ageing of tobacco and shortening natural ageing cycle of tobacco.
Owner:ENZYME ENG INST SHAANXI PROVINCE ACAD OF SCI

Preparation method of mint essential oil burst beads for cigarettes

ActiveCN107723091AImprove compactnessImprove the airtightness of the cyst wallTobacco smoke filtersEssential-oils/perfumesWater soluble polymersIon
The invention provides a preparation method of mint essential oil burst beads for cigarettes, belonging to the technical field of cigarette processing. The preparation method of burst beads comprisesthe following steps: performing high-speed homogenization and emulsification on mint essential oil, a calcium ion water solution and a surfactant to form an emulsion, directly and dropwisely adding emulsion drops into a sodium alginate water solution through an orifice by controlling the flow velocity of the emulsion at 1-5mL / minute by using a peristaltic pump, enabling the emulsion drops to stayin the sodium alginate solution for 2-40 minutes to obtain calcium alginate beads, taking out the beads, washing the beads with distilled water, putting the beads into an oxidizer water solution, performing soaking for 1-20 minutes, taking out the beads, washing the beads with distilled water, soaking the beads in a water-soluble polymer solution for 5-30 minutes, taking out the beads, washing thebeads with distilled water, and performing natural air drying, thereby preparing the mint essential oil burst beads for cigarettes, of which the grain size is 1-20mm. The mint essential oil burst beads for cigarettes are applied to cigarette filters to achieve the goal of improving the quality of cigarettes.
Owner:WUHAN YELLOW CRANE TOWER NEW MATERIAL TECH DEV

Method for producing novel blended type cigarettes with flue-cured tobacco styles

The invention belongs to the technical field of cigarette production, and particularly relates to a method for producing novel blended type cigarettes with flue-cured tobacco styles. The method comprises extracting Hubei Enshi burley tobacco and American burley tobacco with ethyl alcohol in a concentration of 30%; subjecting the extracted tobacco to high-temperature processing in a baking oven, and performing charging for spare; meanwhile, performing charging and perfuming on functional module cut tobaccos according to requirements of blended type cigarette styles; adding an appropriate number of the functional module cut tobaccos, tobacco flake cut tobaccos expanded cut stems and expanded cut tobaccos with cut flue-cured tobaccos serving as basic cut tobaccos, performing evaluation, analysis and screening repeatedly and determining a cigarette blending formula finally. The novel blended type cigarettes produced by the method have the advantages of being delicate in fume, rich and harmonious in fragrance, heavy and soft in fume, comfortable in flavor, and clear and sweet in aftertaste; the style of the novel blended type cigarettes is similar to the style of Chinese flue-cured tobacco type cigarettes, besides, the cigarettes have characteristics of international blended type cigarettes, and requirements of different consumers can be met.
Owner:HUBEI CHINA TOBACCO IND

Chinese style smoke-free tobacco product containing corsvenor momordica fruits

ActiveCN102499447ANo harmGreat tasteTobacco treatmentBiotechnologySecondhand tobacco smoke
The invention relates to a Chinese style smoke-free tobacco product containing corsvenor momordica fruits, which comprises a mixture formed by a tobacco material, an acid-base adjusting agent, a taste correcting agent, a sweetening agent, a flavoring agent, a freshening agent and the like, and a corsvenor momordica fruit preparation is added into the mixture. A preparation process comprises the step of adding various auxiliary materials in batches in different links of the original production line. The smoke-free tobacco product prepared by using the formula and the process has dark brown or reddish brown material appearance, uniform, damp or oily and glossy granules and slight tobacco fragrance. The Chinese style smoke-free tobacco product has the advantages of enriching the function andvariety of the Chinese style smoke-free tobacco product, improving the taste of the original product, not only providing a sense of satisfaction to tobacco consumers similar to the traditional cigarette products and moderate strength, but also playing the efficacy of clearing away heat, relieving sore throat, relieving cough, reducing sputum,promoting body fluid, moistening the lungs and the like. Mouth irritation is lower than that of similar ordinary cigarettes. The Chinese style smoke-free tobacco product is applicable to the psychology and the taste characteristics of domestic consumers, can not produce smoke and is free of 'secondhand smoke' environmental smoke harm.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC

Electronic cigarette liquid with blueberry flavor and preparation method thereof

The invention provides electronic cigarette liquid with a blueberry flavor and a preparation method thereof. The electronic cigarette liquid with the blueberry flavor disclosed by the invention is prepared from propylene glycol, glycerinum, 1,3-butanediol, a sorbitol solution, a tomato extract, blueberry juice concentrate, an edible blueberry flavor and the like in a manner of evenly mixing according to the ratio, wherein the tomato extract is obtained by ultrasonic treatment, ethanol heating reflux extraction, and vacuum rotary evaporation concentration; the blueberry extract is obtained by squeezing extraction and vacuum rotary evaporation concentration. The electronic cigarette liquid with the blueberry flavor comprises the following components in parts by weight: 1-80 parts of propylene glycol, 1-70 parts of glycerinum, 1-30 parts of 1,3-butanediol, 1-30 parts of sorbitol solution, 1-10 parts of tomato extract, 1-10 parts of blueberry juice concentrate and 0.1-5 parts of edible blueberry flavor. The electronic cigarette liquid disclosed by the invention has good blueberry fragrance, fresh and sweet taste and moderate strength, and can meet the smoking requirements of consumers on fruity electronic cigarettes.
Owner:江苏浩丰生物科技有限公司

Fertilizing method for planting cigar tobacco

The invention provides a fertilizing method for planting cigar tobacco. The fertilizing method comprises the following steps of: firstly, early fertilizing base fertilizer: in 20-30 days before transplanting, trenching on the formed land with the interval of 110cm, the depth of 10-15cm and the width of 8-10cm, uniformly paving the base fertilizer at the bottom of the trench and ridging; secondly, applying seedling protecting fertilizer for transplanting: when small cigar seedlings are transplanted, dissolving ammonium nitrate into water, injecting the mixed solution and pesticide as transplanting water into the root parts of the seedlings, wherein 3-5kg of ammonium nitrate is fertilized in each mu; thirdly, irrigating roots by using seedling restoring fertilizer: in about 7 days after the tobacco seedlings are transplanted, irrigating the roots by using 5-7g / mu of potassium nitrate and an insect infestation resisting pesticide and then covering a layer of fine soil around tobacco roots; fourthly, timely applying seedling eccentric fertilizing; fifthly, digging holes and applying and burying growth flourishing fertilizer and irrigating by matching the growth flourishing fertilizer with biogas slurry; and sixthly, carrying out additional fertilizer and spraying at the mature stage. The fertilizing method disclosed by the invention has the advantages of simplicity in operation, standard specification, strong pertinency and greatly-improved yield and quality of cigar tobacco.
Owner:HUBEI CHINA TOBACCO IND

Control method for realizing sustained release of smoke of heating non-combustion tobacco products

The invention relates to a control method for realizing sustained release of smoke of heating non-combustion tobacco products. According to the control method, a heating device adopts the heating modecomprising a preheating stage I, as well as a thermal insulation stage II and a smoking stage III which are circularly and alternately carried out, wherein the circulating times of the thermal insulation stage II and the smoking stage III is 5-20 times. With the control method, the puff number can be controlled, the smoke amount is sufficient, the irritation is small, the aftertaste is clean, theobvious miscellaneous qi and residue do not exist, the strength is moderate, the temperature of the smoke is moderate and free of the burning heat sensation, and when not in smoking, no sidestream smoke is emitted.
Owner:CHINA TOBACCO ANHUI IND CO LTD

Scintillating organic materials and methods for detecting neutron and gamma radiation

Embodiments pertain to a method and apparatus for detection of radiation. Embodiments relate to the detection of fast and / or thermal neutrons. Embodiments are directed to detection of neutrons in high backgrounds of gamma rays. Embodiments can have high sensitivity and / or high gamma discrimination. Embodiments can include a given single material that can detect fast neutrons and simultaneously detect gamma rays with moderate energy resolution. Embodiments pertain to liquid, viscous liquid, gel, and / or solid scintillating materials. Embodiments relate to a scintillating matrix, such as a liquid, having a highly polar matrix, such as a liquid solvent, dissolved dyes, and a high concentration of a dissolved organo metallic compound. The use of a single material for a large area detector of fast neutrons and gamma rays can provide material and cost benefits.
Owner:NANOPTICS

Highland barley composite special dietary nutritional powder with auxiliary blood glucose reducing function and preparation method thereof

The present invention discloses a highland barley composite special dietary nutritional powder with auxiliary blood glucose reducing function and a preparation method thereof. The nutritional powder comprises the following raw materials by weight: 30 to 45 parts of puffed highland barley flour, 1 to 5 parts of beta glucan powder, 2 to 10 parts of high-quality protein, 2 to 5 parts of nutritional lipids, 3 to 10 parts of medicine food homology plant extracts, 10 to 20 parts of functional natural ingredients, 0.1 to 0.5 part of complex vitamins and 2 to 4.5 parts of complex minerals. The preparation method comprises seven steps of material selecting, washing, crushing, puffing, crushing, primary auxiliary material blending, secondary auxiliary material blending, mixing, sterilizing and canning. According to the invention, to aim at the unreasonable diet components, imbalance nutrition and other problems of current diabetes, a plurality of high-quality protein, medicine food homology plant extracts, functional natural ingredients complex vitamins, complex minerals and other materials are matched to prepare the nutritional powder. The nutritional powder with various functional components has a better blood glucose reducing effect.
Owner:汉济生物科技(武汉)有限公司

Cigarette flavoring coating material and application thereof

The invention discloses a cigarette flavoring coating material and application thereof. The cigarette flavoring coating material is prepared from, by mass, 10-40% of a component A, 0-40% of a component B, 0-30% of a component C and 0-70% of an essence. By selecting suitable essence and spice raw materials and adjusting compounding and dosage of the raw materials, the cigarette flavoring coating material which is high in overall smoke concentration, fine and soft in smoke, good in richness and harmony, moderate in strength, clean in remaining taste and good in sweet-and-moisturized feeling andoverall comfort is finally formed. The cigarette flavoring coating material is used for preparing and developing heat-not-burn cigarettes; the feasible cigarette flavoring coating material is providedfor low-temperature cigarettes, and powerful technical support is provided for conducting further development and improving the quality and mouthfeel of reconstituted tobacco.
Owner:CHINA TOBACCO GUANGDONG IND +1

Aloe tobacco substitute product and manufacturing method thereof

The invention discloses an aloe tobacco substitute product and a manufacturing method thereof, and belongs to the technical field of health products. The aloe tobacco substitute product is prepared by aloe leaves, the aloe leaves are processed through steps of 1) material preparation, 2) pretreatment of the prepared material, 3) a baking process, 4) storage and fermentation and 5) cigarette making, and the aloe is made into cut tobacco or slices and then are processes and produced into cigarettes or cigars. By improving the aloe tobacco substitute product during the processing process, the content of barbaloin or aloe-emodin in the aloe tobacco substitute product can be effectively reduced, when people smoke the aloe tobacco substitute product, the intake of aloe-emodin is controlled, the aloe tobacco substitute product is combined with traditional Chinese medicine, safety of the aloe tobacco substitute product is guaranteed, the health care effect of the aloe tobacco substitute product is improved, under the condition that the physiological need of the smoker is satisfied, tar and harmful components are reduced, and the flavor of aloe tobacco is further improved.
Owner:郭宏 +1

Method for manufacturing surface-coated cutting insert

This method for manufacturing a surface-coated cutting insert includes clamping and holding a surface-coated cutting insert with a pair of rotary shafts which are rotatable around an axis, and jetting an abrasive fluid to the surface of the surface-coated cutting insert using at least one blasting gun while rotating the surface-coated cutting insert, thereby, conducting wet blasting.
Owner:MITSUBISHI MATERIALS CORP

Aloe vera cigarette paper and preparation method thereof

Belonging to the technical field of cigarette paper, the invention relates to an aloe vera cigarette paper and a preparation method thereof. The aloe vera cigarette paper is prepared by adding cigarette paper raw materials into aloe vera, and carrying out mixing pulping, papermaking and cutting. The invention uses aloe vera as the raw material to prepare cigarette paper, on the one hand, the cigarette paper quality can be enhanced, the cigarette paper burning speed can be regulated, the cigarette paper ash packaging performance can be improved, the tensile resistance, combustibility, air permeability, nontransparency and other indexes of existing cigarette paper are improved, and on the other hand, aloe vera cigarette paper has the closest sapor to tobacco, does not contain nicotine, has low tar content, also has aloe vera efficacy, and can remove lung heat and remove toxicity, ensure human body acid-base equilibrium and improve the smoking safety. At the same time, aloe vera itself is natural green, can improve the cigarette aesthetic feeling and promote smoking desire. The method provided by the invention can also be applied to preparation of tipping paper, cigarette plug paper or other functional paper.
Owner:郭宏 +1

Laser treatment apparatus

The invention provides a laser treatment apparatus. The laser treatment apparatus comprises a laser generating device, a laser beam transmission component connected with the laser generating device, and a handpiece, wherein the handpiece comprises a handle, a scale base, a column barrel, a grating assembly, and a scale indicating assembly; through arrangement of a reflecting assembly or a focusing assembly at the top end of the column barrel, the laser treatment apparatus treats laser into a light spot matrix with preset spot distance through the grating assembly arranged inside the column barrel; the light spot matrix is reflected or focused by the reflecting assembly or the focusing assembly mounted at the top end of the column barrel to a part to be treated; emergent light spots are uniform in distribution and moderate in energy, so that the laser treatment is higher in safety and comfort.
Owner:MEDELUX

Titanium alloy valve lifter and method of manufacturing same

A lightweight and high-strength valve lifter is excellent in wear resistance and sliding properties. The valve lifter is made of a titanium alloy having a hardened layer on the top surface thereof, on which a cam is caused to slide. The hardened layer is composed of an α-case and an oxygen diffusion layer under the α-case. The α-case 22 is formed in a thickness of not less than 3 μm and not more than 15 μm. The oxygen diffusion layer has a thickness of not less than 10 μm. The hardened layer on the top surface of the valve lifter is formed by oxidation treatment in a furnace at a temperature of not less than 600° C. An outermost oxide layer 21 formed on the α-case as a result of the oxidation treatment I s removed.
Owner:HONDA MOTOR CO LTD

Preparation method of clove flavor cigar with auditory effect

ActiveCN107836748ASo sweetModerate suction permeabilityCigar manufactureCigar SmokingBud
The invention provides a preparation method of clove flavor cigar with an auditory effect. The preparation method concretely comprises the following steps of picking clove according to requirements; performing cleaning and dust removal on the picked dry clove buds; performing drying through drying equipment; taking out the buds for use after the water content is lower than 5 percent; putting 5 to6 processed clove buds into the center position of a single cigar core leaf; sequentially distributing the clove buds into a line to prepare a cigar core; then, taking one leaf roll for winding the cigar core; performing fixing and shaping; then, putting the materials into a wood cigar mold for 30 to 45 minutes; finally, taking one piece of a binder leaf for well covering a cigarette bundle; usingplant glue for bonding and winding the cigar; next, putting the cigar into a refrigerator; putting the refrigerator into a constant-temperature constant-humidity balance room; controlling the temperature to be 18 to 20 DEG C and the humidity to be 65 to 75 percent; performing placement for 25 to 35 days. The prepared cigar has the slight clove flavor; during the smoking, the uniform slight clacking sound is generated at a frequency of once per 2 to 3 seconds; the sound volume is proper; the auditory effect is added for the cigar smoking.
Owner:HUBEI CHINA TOBACCO IND

Binary filter stick of composite aromatic plant particles and preparation method thereof

The invention relates to a binary filter stick of composite aromatic plant particles and a preparation method thereof, and belongs to the technical field of cigarette filter tips. The binary filter stick comprises a filter element and wrapping paper wrapping the filter element, and the filter element is composed of an acetate fiber charge bar section containing aromatic plant particles and an acetate fiber white stick section which are connected. The acetate fiber white stick section is arranged at the near lip end. The aromatic plant particles adopted in the acetate fiber charge bar section containing aromatic plant particles are prepared from, by mass, 69-71% of peppermint stalks and 29-31% of chicory roots, wherein the total percent of the peppermint stalks and the chicory roots is 100%; the water content of apple blossoms and the water content of chicory roots are each 6-8%. The cigarette holder filtering efficiency is enhanced, cigarette smoke can be mellow and soft, the coordination is good, the strength is moderate, the taste is comfortable, the fragrance is graceful, and offensive odor and irritation are lowered; meanwhile, due to the apple blossoms, the sweet taste is improved; due to the chicory roots, the fragrant smell is enhanced, the cigarette smoking taste is enriched and improved, and smoke can be uniformly released and emitted in a lasting mode.
Owner:CHINA TOBACCO YUNNAN IND

Light air-pressure type shallow water area earthquake wave full-automatic trigger

The invention relates to a light air-pressure type shallow water area earthquake wave full-automatic trigger which comprises a framework and a shocking hammer body (5), wherein the framework is arranged in a ship body (1), the upper end of the framework is connected with a cylinder (12) which is connected with an air source through a pipeline, a lifting hook (10) is connected with a piston rod (11) of the cylinder (12) in a hinged mode, and the shocking hammer body (5) is matched with the lifting hook (10) in a connecting mode. Overturning is produced when the lifting hook (10) contacts with a limiting plate (8), and then the shocking hammer body (5) falls off and is matched with a cushion plate (3) arranged on the bottom of the ship body in a colliding mode, and earthquake waves are produced. According to the light air-pressure type shallow water area earthquake wave full-automatic trigger, the earthquake waves produced are moderate in energy and frequency band, low in noise waves, and adjustable and fixable in the energy and impacting frequency. Meanwhile, the light air-pressure type shallow water area earthquake wave full-automatic trigger is light, portable, convenient to carry due to the fact that total weight of the trigger is less than 60 k, and is suitable for being used in shallow water areas and sites without hoisting devices.
Owner:ANHUI & HUAI RIVER WATER RESOURCES RES INST +2

Smoke-free tobacco based on fresh tobacco preparing

InactiveCN103494317AModerate energyMild and Comfortable TasteTobacco preparationTobacco leafSmoke
The invention belongs to the field of smoke-free tobaccos, and particularly relates to a smoke-free tobacco based on fresh tobacco preparing. The raw material of the smoke-free tobacco is washed and broken fresh tobacco leaves with 10%-50% of water content, then according to the total weight of tobacco powder, 1%-10% of corrigent, 1%-5% of sodium bicarbonate or sodium carbonate, 1%-10% of sweetening agents, 0.05%-5% of flavoring agents, 0.2%-3% of humectants, 0.01%-1% of antioxidant and 0.01%-1% of antiseptic are added, and then the mixture is processed to be the smoke-free tobacco through follow-up procedures. The smoke-free tobacco has a special flavor of fresh tobacco leaves, is moderate in vigor, mild and comfortable in flavor, moderate in oral throat stimulation and suitable for consumer psychology and taste characters of native consumers, and has multiple soluble proteins good to the human body, meanwhile, the process procedures of the product are short, and accordingly the smoke-free tobacco is economical.
Owner:HONGTA TOBACCO GRP

Fresh-and-sweet electronic cigarette solution and preparing method thereof

The invention provides a fresh-and-sweet electronic cigarette solution and a preparing method thereof.The blueberry-flavor electronic cigarette solution is obtained in the mode that 1-80 parts by weight of propylene glycol, 1-70 parts by weight of glycerol, 1-30 parts by weight of 1,3-butanediol, 1-30 parts by weight of d-sorbitol solutions, 1-10 parts by weight of tomato extract, 1-10 parts by weight of blueberry juice concentrated solutions, 0.1-5 parts by weight of edible blueberry essence and the like are mixed to be even in proportion; a method for obtaining tomato extract includes the steps of ultrasonic treatment, ethyl-alcohol heating reflux extraction, and pressure-reduction rotating evaporation concentration; a method for obtaining blueberry extract includes the steps that of squeezing, extracting and being subjected to vacuum rotary evaporation and concentration.The electronic cigarette solution has the good blueberry fragrance, the taste is fresh and sweet, strength is moderate, and the smoking requirement of consumers for fruity electronic cigarettes can be met.
Owner:邹玉华

Agricultural working machine

InactiveUS20080261670A1Moderate energy demandModerate loadMowersCuttersForage harvesterGap width
A forage harvester is provided with intake conveyor mechanisms, which convey the chopped material to a downstream chopping assembly, with an upper discharge chute located downstream of the chopping assembly, and with a conditioning device composed of a rotatably drivable roller assembly located between the chopping assembly and the upper discharge chute, and it is possible to adjust the at least two crop material passages between the conditioning rollers of the conditioning device and the gap width of the at least two passages in such a manner that the gap width of the passage located in the inlet region of the conditioning device is larger than the gap width of a passage located downstream in the material flow direction.
Owner:CLAAS SELBSTFAHRENDE ERNTEMASCHINEN GMBH

Leisure food specially used for children-formula of quinoa high protein wafer and preparation method of wafer

The invention discloses a formula of a quinoa high protein wafer and a preparation method, belonging to the technical field of food processing. At present, the phenomena that children develop slowly and are underweight due to undernourishment still exist among urban and rural residents in China. The wafer is specifically developed for the type of children, according to the formula, the wafer is prepared from 20-50 parts of wheat flour, 5-15 parts of quinoa, 20-40 parts of an egg, 7-10 parts of cane sugar, 10-15 parts of edible oil, 1.0-2.0 parts of sea-buckthorn hide powder, 5-10 parts of inulin and 0.01-0.05 part of stevioside. The quinoa contains more than 15% of protein, wherein the content of necessary amino acid is higher than that of wheat and rice, the proportion is moderate, the quality is equivalent to that of meat and milk, and the quinoa is excellent vegetable protein. Nutrients such as mineral substance and vitamin are higher than those of common foods. The quinoa is selected as a source of protein, eggs are supplemented, and the wafer has the characteristics of high protein content and high absorption and utilization rate. In the formula, zinc and calcium elements areadded, thereby being conducive to the healthy development of children. As a baking process is adopted, the wafer tastes crisp and tender and is moderate in sweetness, thereby being easily accepted bythe children.
Owner:YANGZHOU RUNKANG BIOTECH CO LTD

Method for leaching out scandium from niobium tailing dressing

The invention provides a method for leaching out scandium from niobium tailing dressing. The method comprises the following steps: niobium tailing dressing powder is obtained through crushing the niobium tailing dressing, the niobium tailing dressing powder, CaC12 and reducing carbon powder are sufficiently ball-milled and uniformly mixed, tap water is added for wetting to obtain slurry, the slurry is roasted at a temperature of 680 to 800 DEG C for 2 to 6 h to obtain a roasted product, the roasted product is added in concentrated hydrochloric acid with solid-liquid massic volume ratio of 1:2.1 to 1:3.2 to be subjected to concentrated hydrochloric acid leaching to obtain leachate and leaching slag, and the leachate is subjected to concentrated hydrochloric acid recovery, concentration and purification to obtain scandium. The method solves the technical problems that in the prior art, scandium is difficult to recover, the scandium leaching rate is low, and the cost is high.
Owner:HUNAN RARE EARTH METAL MATERIAL RES INST
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