46 results about "Sieve" patented technology

The invention discloses a benefication method for recovering specularite. The method comprises the processes of primary grinding, grading, primary low intensity magnetic separation, and tailings discarding by primary high intensity magnetic separation; rough concentrate pre-classification by the primary low intensity magnetic separation and the primary high intensity magnetic separation, secondary grinding, secondary low intensity magnetic separation to obtain concentrates, secondary high intensity magnetic separation to obtain concentrates; and selective flocculation desliming secondary conducted on high intensity magnetic separation tailings (middlings), and anionic reverse flotation. The method further comprises the step of arranging a cylindrical slag separating sieve before the primary high intensity magnetic separation. With the advantages that the iron concentrate grade and the iron recovery are high, the loss of granular iron minerals is low, the mineral process flow is short, concentrates and tailings can be obtained in advance and the energy consumption of the benefication is low, the invention can be used not only for selecting specularite ores, but also for selecting weakly magnetic iron minerals, such as hematite, goethite, siderite, limonite, and the like.

The invention discloses a sand screening device for bridge construction, and relates to the technical field of construction machinery. The sand screening device comprises a screening box, wherein a horizontal frame is arranged in the screening box, a conveying belt is rotationally arranged on the horizontal frame, a drying mechanism which vertically corresponds to the conveying belt is fixed at the inner top of the screening box, a servo motor II is fixedly arranged outside the screening box, and an excitation mechanism which is in transmission connection with a sieve plate is connected with the servo motor II in a driven mode. According to the sand screening device, before sand is screened, a sand fetching tank is driven by the conveying belt to repeatedly turn over the sand, so that the sand is more dispersed; meanwhile, an air injection disc in the drying mechanism is used for carrying out hot air drying on the sand dispersed on the conveying belt, so that the volatilization of water is promoted, the fluidity and the dispersion degree of the sand are higher, the screening efficiency is obviously improved, the excitation mechanism can achieve the up-and-down vibration effect of the sieve plate, it is guaranteed that the fine sand can be accelerated to pass through the sieve plate, and sand screening is more sufficient.

The invention discloses a rapid and high efficiency chlorogenic acid and galuteolin in honeysuckle flower extraction method and a HPLC quantitative analysis method, and which comprise the following steps: superhigh pressure extraction and quantitative analysis. Superhigh pressure extraction comprises the steps as follows: firstly crushing dried honeysuckle flower and filtering by a sieve with 60-80 meshes, adding water or ethanol, methanol and n butanol organic solvent into the honeysuckle flower powder according to 1:10-1:100 solid liquid ratio, mixing and sealing, immersing at normal temperature, placing the mixture into a high pressure container, leaching with pressure at 20-60 DEG C. for 1-5 min, relieving pressure, carrying out centrifugation of extract product and obtaining the honeysuckle flower extract. Quantitative analysis: after centrifugation, diluting 2ml of the obtained supernatant to 10 ml with distilled water in a volumetric flask, refrigerating for standby. The chlorogenic acid and galuteolin in honeysuckle flower are extracted by a superhigh pressure technology and are carried out by a content determination, and the invention has the characteristics of high recovery rate, short extraction time, small solvent amount, simple operation, accuracy, good repeatability, no pollution, safety, low energy consumption, etc.

A production method for a sintered valve guide includes preparing a raw powder which is primarily made of an iron powder and which includes at least a copper alloy powder and a graphite powder. The production method further includes compacting the raw powder into a green compact having an approximately cylindrical shape and sintering the green compact at 950 to 1050° C. The iron powder includes particles, which do not pass through a sieve of 240 mesh, at not less than 40 mass %, and not less than 70 mass % of the powder particles have not more than 0.5 of degree of circularity.

The invention provides a multifunctional organic/inorganic compound fertilizer and a preparation method thereof. The compound fertilizer is composed of the following raw materials by weight percent: 25-30% of urea, 5-10% of monoammonium phosphate, 10-18% of potassium sulphate, 27-32% of humic acid, 1.5-3% of zinc sulfate, 0.1-0.3% of microorganism bacterial liquid, 12-20% of diatomite and 1.9-2.7% of sophorolipid, wherein humic acid is obtained from decomposed coal through activation treatment. During preparation, urea, monoammonium phosphate, potassium sulphate, humic acid, zinc sulfate, microorganism bacterial liquid, diatomite and sophorolipid are added to a mixing crusher for crushing, so that a powdery mixture is obtained; the powdery mixture is added to a drum coating-pelleting-drying-cooling integrated machine to be pelleted, dried and cooled so that a granular mixture is obtained; the microorganism bacterial liquid and the diatomite are mixed and then sprayed to the mixture so that a crude product of the multifunctional organic/inorganic compound fertilizer is obtained; and finally, the crude product is added to a vibrating sieve for screening and then the obtained oversize is the multifunctional organic/inorganic compound fertilizer.

The invention provides a preparation method of an LCZ696 sustained release matrix tablet. The specific prescription of the LCZ696 sustained release tablet comprises (g/g): 40% of a main drug, 10%-20% of a matrix material, 30%-40% of a diluent, and 5%-10% of a lubricant. The preparation method consists of: sieving the raw and auxiliary materials by a 80-mesh sieve respectively for standby use, firstly mixing the main drug with the matrix material evenly, then adding the diluent and the lubricant and mixing the materials evenly, and performing all powder direct compression, thus obtaining the LCZ696 sustained release matrix tablet. The sustained release tablet is used for medication once every 24h, and the number of medication times is reduced. After oral taking, drugs are released slowly, the blood concentration is stable, and peak valley phenomenon is not generated. Also, the toxic and side effects of drugs are reduced.

The invention relates to a threshing device, which improves the separation performance by setting a regulated fall in the separation path of a glume sieve. The front end part of the glume sieve (33) is disposed a position lower than the back end part of a first glume sieve (31), forming a first step (A). In addition, the front end part of a third glume sieve (34) is arranged in a position lower than the back end part of the second glume sieve (34), forming a second step (B). Besides, a blowing path for blowing towards the first step (A) and the second step (B) is formed.

The invention discloses a preparation method of traditional Chinese medicine composition for purifying mandarin fish ponds. The method comprises steps as follows: baical skullcap roots, black nightshade herbs, fresh ginger, pomegranate rinds, red peony roots, cyrtomium rhizomes, perilla stems, peonies, arnebia roots, liquorice roots, argy wormwood leaves, stemona roots, acanthopanax root bark, tobacco leaves, pepper and ageratum are crushed, screened through a sieve of 60-70 meshes, soaked in water, heated and cooked until the moisture content is 20wt%-45wt%, hydroxyethyl cellulose is added, the mixture is stirred and granulated, and first preformed materials are obtained; alkaloid, Celastrus angulatus, Artemisia toosendanin, orange terpenes, pyrethrins and poly(aspartic acid) are evenly stirred, stir-fried shells, illite, illite smectite clay, diethylene glycol butyl acetate and microcrystalline wax are added and stirred, the mixture is atomized and sprayed onto surfaces of the first preformed materials, and second preformed materials are obtained; Celastrus angulatus missible oil, sodium carboxymethylcellulose, nacre mothers of pearls, activated carbon, an EM (effective microorganisms) liquid and water are evenly mixed, the mixture is atomized and sprayed onto surfaces of the second preformed materials, the second preformed materials are dried and screened, and the traditional Chinese medicine composition for purifying the mandarin fish ponds is obtained.

The invention discloses an adsorption device. The adsorption device comprises a rectangular box, wherein upright columns are arranged at the four corners at the bottom of the rectangular box; an air inlet is formed in the outside surface at the lower end of the rectangular box; an air outlet is formed in the upper surface of the rectangular box; a cross beam is arranged in the rectangular box; a motor is fixedly installed on the cross beam; a vertical rotating shaft is fixedly connected at the rotating end of the motor and is fixedly sleeved by a plurality of layers of vanes; a first stage air flow distribution layer is arranged above the cross beam and is jointly formed by support ribs, a sieve plate, an isolation plate and an adsorbent A; the support ribs are fixedly installed in the rectangular box; the sieve plate is arranged on the surfaces of the support ribs; the isolation plate is arranged on the sieve plate; the adsorbent A is arranged on the isolation plate; a second stage air flow distribution layer is arranged above the first stage air flow distribution layer; a controller is arranged on the outer surface of the rectangular box. The adsorption device has the beneficial effects of simple structure and strong practicability.

The invention provides a lotus nut screening machine comprising a rack; a lotus nut shake-off roller arranged on the rack and comprising a sieve barrel and a housing arranged on the periphery of the sieve barrel; a first lotus nut discharge hopper and a second lotus nut outlet hopper; a driving device comprising a drive motor and a driving control circuit; and a vibration device comprising a vibration motor and a vibration control circuit; wherein, an inlet of one end of the sieve barrel is provided with a feed hopper, and an outlet of other end of the sieve barrel is provided with a discharge hopper; the wall of the round sieve barrel is provided with helical push blades, and a lotus seed stirring plate is installed between the adjacent helical push blades. By this way, lotus nuts of massive lotus seeds with nuts removed or open edges can be shaken off, screened and dedusted continuously and efficiently; the lotus seeds are shaken off by combining the helical push blades and the lotus stirring plates, so that the separation rate of the lotus seeds from the lotus nuts is improved greatly, and lotus seed fragments, residual lotus nuts and dust mixed in the lotus seeds can be screened and separated effectively.

The invention discloses steamed total millet flour cone-shaped bread and a producing method thereof. The producing method includes following steps: (1) milling the millet, sieving the milled millet through a sieve in 80-100 meshes, adjusting the content of water to be 16%, feeding the millet into a material-feeding hopper of a dual-screw extrusion puffing machine for performing extrusion puffing, re-milling the puffed millet and sieving the re-milled puffed millet through a sieve in 80-100 meshes to obtain millet extrusion powder; and (2) mixing millet starch, water, baking powder, instant dry yeast and the millet extrusion powder obtained in the step (1) and successively performing following operations: kneading, shaping, fermentation and steaming to obtain the steamed total millet flour cone-shaped bread. The steamed total millet flour cone-shaped bread is rich in nutrition, is good in palatability, is convenient to eat and has a wide market prospect.

The invention discloses a purifying column comprising a housing (1), sieve plates and an adsorption filler (6), wherein the sieve plates and the adsorption filler (6) are disposed in the housing (1). The purifying column is characterized in that the sieve plates are a first sieve plate (2), a second sieve plate (3), and a third sieve plate (4) in sequence from top to bottom; a filter layer (5) is disposed between the first sieve plate (2) and the second sieve plate (3); and the adsorption filler (6) is disposed between the second sieve plate (3) and the third sieve plate (4). By utilizing the above way, the purifying column provided by the invention is advantageous in that impurities in raw materials can be effectively removed; and all the raw materials flow into the adsorption filling material, and therefore the accuracy of analysis results is ensured.

The invention relates to an active pure snake powder capsule and a preparation technique thereof. The invention adopts the technical scheme that the active pure snake powder capsule is prepared from Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder according to the weight ratio of 2-3:1. The preparation technique comprises the following steps: delivering the washed Agkistrodon halys and the washed black-tail snake into a freezing dryer and freezing for 7-9 hours at negative 45 DEG C to negative 35 DEG C; starting a vacuum pump and heating to sublimate for 9-11 hours at 25-35 DEG C under a state of the vacuum degree of 1.3-13Pa; heating to sublimate for 11-13 hours at 55-65 DEG C; heating to sublimate for 9-11 hours at 75-85 DEG C; after vacuum drying, pulverizing the Agkistrodon halys and the black-tail snake coarsely by a roller respectively, then pulverizing finely and obtaining Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder; and mixing the Agkistrodon halys freeze-drying powder and the black-tail snake freeze-drying powder evenly according to the weight ratio of 2-3:1, sieving with a sieve of 80 meshes and granulating a sieved substance by a capsule granulating machine after sterilizing by microwave. The invention can retain all the effective components of a snake, has curative effect to the three-high and is convenient to eat.

The invention provides an efficient preparation method of ultra-precision cutting abrasive sand. The method comprises the following steps: roughly crushing iron-aluminum type garnet crude ore; sequentially processing by scrubbing and sieving through a rotary screen, washing with water through a screw sand washer, and overflowing to deslime; carrying out gravity concentration through a spiral chute to obtain fine-graded garnet with purity reaching 60 to 70%; washing with water again through the screw sand washer; drying to obtain dried and fine-graded garnet sand with water content less than 0.2%; removing dust through a cyclone separator; magnetically separating; removing dust again to obtain fine garnet sand with purity more than 97%; then screening by grades through an ultrasonic sound sieve to obtain cutting garnet sand, wherein the particle size distribution of the cutting garnet sand is that the cutting garnet sand with particle size ranging from 0.045 to 0.053mm is less than 8% in content, and the cutting garnet sand with particle size ranging from 0.053 to 0.1mm is more than 92% in content. The method is simple and high in operability, and the prepared garnet-based cutting abrasive sand is uniform in particle size, high in mobility, and high in cleanness.

The invention discloses a sandy soil screening device for building construction. The device comprises a spiral feeding mechanism, a feeding pipe and a screening bin; in the operation process, a speedreducer and a motor on the spiral feeding mechanism are turned on, the speed reducer drives a rotating shaft to rotate, a spiral feeding blade rotates to continuously pour an appropriate amount of sandy soil into a conveying cylinder through a feeding funnel, the sandy soil is conveyed to a discharging pipe to be moved out by rotating the spiral feeding blade, clamping rods are extruded, and second springs are compressed, so that the two ends of each clamping rod are moved out from the interior of a clamping groove; door plates are opened, the motor is turned off, the outer surfaces of the upper side walls of the door plates are placed on the side walls of discharging channels, the sandy soil in corresponding screening boxes flows out from the discharging channels through the surfaces of the door plates, and discharging is convenient; according to the sandy soil screening device, the screening efficiency is improved by continuously sliding the screening boxes, the screened soil is further screened by multiple layers of sieves different in pore diameter, the operation process saves time and labor, the working efficiency is improved, and the device runs stably, facilitates feeding and discharging and provides convenience for operation workers.

The invention discloses a screening device for organic fertilizer production. The screening device comprises a smashing box, wherein a plurality of smashing blades are mounted in the smashing box, thetop of the smashing box is completely open, a sieve plate is mounted at the top of the smashing box and covers the opening in the top of the smashing box completely, a roller is mounted on the sieveplate, the center shaft of the roller is parallel to wide edges of the sieve plate, the length of the roller is larger than the width of the sieve plate, connecting rods parallel to the center shaft of the roller are connected to two ends of the roller, sliding rods perpendicular to the connecting rods are connected below the connecting rods, sliding rails are connected below the sliding rods, andthe sliding rods reciprocate on the sliding rails along long edges of the sieve plate. According to the screening device, granular raw materials such as organic fertilizer yeast, biological excrementand the like are smashed in advance, granules with proper grain size are screened out, and uniformity of the raw materials is improved.

A low-breakage sunflower threshing machine capable of automatically adjusting de-seeding gaps comprises a rack, an electromotor which is fixedly arranged on the lower side portion of the rack and provides power for the threshing machine to conduct threshing and a threshing roller fixed to the rack; the threshing roller comprises a roller body which is connected with bearing seats at the two ends of the rack in a matched mode, a machine cover arranged at the top of the roller and a punching sieve located below the roller body; spiral blades are arranged on the outer circumferential surface of one end of the roller body, and rolling teeth are arranged on the outer circumferential surface of the other end of the roller body; a feeding opening used for feeding sunflowers is formed in the side, close to the spiral blades, of the machine cover, a waste material opening used for discharging threshed sunflower discs is formed in the side, close to the rolling teeth, of the machine cover, and the bottom of the punching sieve is connected with the rack through an elastic element. The low-breakage sunflower threshing machine capable of automatically adjusting the de-seeding gaps has the advantages that the threshing machine is simple in structure, convenient to operate and strong in practicability, the sunflower discs are not broken, thorough threshing is achieved, the threshing speed is high, and the breakage rate is small.

The invention belongs to the field of composite solid propellant manufacturing, and discloses a low-cost inert hydroxyl terminated polybutadiene (HTPB) composite solid propellant, which comprises an inert filler, metal powder, a binder, a plasticizer, a curing agent, a bonding agent and an anti-aging agent. The invention further discloses a preparation method of the low-cost inert hydroxyl terminated polybutadiene (HTPB) composite solid propellant, wherein the preparation method comprises: solid raw material pre-baking, wherein fine sand is screened by 20 mesh stainless steel sieve mesh to remove large-particle impurities, and aluminum powder is screened by a 40 mesh stainless steel sieve mesh; pre-mixing, wherein pre-mixing is performed by a pre-mixer in a workshop having a certain temperature and humidity; mixing, wherein the fine sand is added to the pre-mixed binder slurry containing the aluminum powder, and mechanical kneading and stirring are performed to coat the surface of thesolid particles with the binder slurry; pouring, wherein the propellant slurry is poured in an engine shell; curing, wherein the propellant is subjected to a cross-linking curing reaction; and demolding and shaping, wherein the core mold is removed from the engine. According to the present invention, the low-cost inert hydroxyl terminated polybutadiene (HTPB) composite solid propellant can meet the requirements of inert propellants with different density requirements, and the mechanical properties of the propellant can be adjusted by adjusting the bonding agent content and the parameter of theformula.

The invention provides a method for remediating polychlorinated biphenyl polluted soil through the combination of chemical elution and plants, and belongs to the field of polluted soil remediation. The method comprises the following steps that the polluted soil to be remediated is collected, ground, crushed and screened through a 60-mesh sieve, the water content of the screened soil is adjusted to be 40%-60% of the field water capacity of the soil, and the soil is kept for standby application; medicago sativa seeds with white buds being exposed through bud forcing treatment are evenly sown in the standby soil and cultivated, medicago sativa plants are thinned out after growing for two weeks, and the cultivation period of the medicago sativa plants is 90 days; and the process that eluant is sprayed into the soil is started from thinning-out, the eluant is sprayed once every 5-8 days, and thus polychlorinated biphenyls in the soil are removed. Compared with the prior art, the method is advantageous in that operation is easy, the treatment effect is good, and in-situ remediation can be achieved; the influence on the original environment is small in the remediation process, and the method can be used for a wide range of types of soil; when the method is used for practical environmental remediation, the secondary pollution risk is greatly reduced, and follow-up soil cyclic utilization is facilitated.

The invention discloses a method for preparing coarse granularity chromium carbide powder capable of simplifying the process, saving the energy consumption, improving the rate of qualified products ina milling process and well meeting requirements of preparation of wear-resistant, corrosion-resistant, high-temperature oxidation resistant novel materials in industries such as hard-face materials,flux-cored wires, high temperature alloys and the like. The method comprises the following steps: burdening chromium sesquioxide powder and carbon, and adding an adhesive to be uniformly mixed; molding with a press after uniform mixing; placing the molded material block in a high-temperature vacuum induction heating furnace graphite crucible, vacuumizing, performing power-on heating and raising the temperature, and maintaining the vacuum degree to be within 200-400Pa; carrying out a vacuum carbonation reaction between the chromium sesquioxide powder and carbon to produce chromium carbide, andcontrolling the carbonation reaction temperature to be 1350-1550 DEG C, wherein the carbonation reaction time is 8-15 hours; enabling the vacuum degree to be less than 100Pa, filling the furnace withargon after the carbonation reaction is completed, controlling the pressure in the furnace to be 40-80kPa, and increasing the heating power to melt the chromium carbide sintered body so as to obtain achromium carbide ingot; crushing the chromium carbide ingot into particles with the granularity of less than 10mm by using a mechanical method, milling by an impact crusher, and passing through a 60-mesh sieve, thereby obtaining the coarse granularity chromium carbide powder.

The invention discloses a method for detoxifying cottonseed meal, belonging to the technical field of food processing. The method comprises the following steps: (1) smashing cottonseed meal and screening with a 60-mesh sieve; and (2) placing 0.5-10g of the crushed and sieved cottonseed meal at the central position of a pulsed magnet field, and treating by using the pulsed magnet field with intensity of 100-500mT, wherein the pulsed treatment number is 10-60, and thus the detoxified cottonseed meal is obtained. With the adoption of the method, the content of free gossypol in the cottonseed meal can be effectively reduced, the process is simple and easy to operate, and the detoxification treatment time is greatly shortened.

The invention discloses a processing procedure of green tea having excellent taste. The processing procedure of green tea comprises the following steps: spreading tea, that is, spreading the tea on abamboo sieve, and arranging in the sun and allowing standing still in a ventilated place; fixing the tea, that is, pouring the spread tea into a steam fixation machine, and fixing the tea with high-temperature steam; rolling and shaping the tea, that is, combining drying, airing and stir-frying of the tea; packaging the tea. The processing procedure has the beneficial effects that when the tea isprocessed in the green tea processing procedure, steam fixation of the tea can be performed by the steam fixation machine, chlorophyll in the tea can be well remained while performing enzymatic inactivation on the tea, so that the tea is green; when the tea is dried, due to the combination of airing and stir-frying, the airing serves as a principal manner, the stir-frying time of the tea is reduced, and the chlorophyll, tea polyphenol, caffeine and vitamins in the tea can be well remained; due to short-term stir-frying, aroma of the tea can be improved to a certain degree.