59results about How to "Low desorption rate" patented technology

The invention relates to a novel flotation column serial connection test system for improving the flotation granularity upper limit. The equipment of the system comprises a fed material stirring barrel, a feeding pump, a feeding pressure meter, a froth generator, a primary-section foam enriching chamber, a lower catheter, a spray type flotation column chamber, a primary-section tailing box, a secondary-section foam enriching chamber, a column flotation chamber, a rotary flow sorting chamber, a circulation ore pulp pump, a circulation pressure meter, a froth generator, a secondary-section tailing box and an FCMC cyclo-microfroth flotation column, wherein a spray type flotation column and the FCMC cyclo-microfroth flotation column are connected in series by the system, and the primary-section tailing is used as secondary-section fed materials. The system is favorable for the static fast flotation of preference flotation of coal with good flotation performance and the strong power efficient recovery of difficult-to-sort coal, in addition, the problem of high-concentration coal slime flotation can be perfectly solved, the recovery rate of coarse particle coal slime can be improved, and the problem of coarse particle running of coarse particle flotation can be solved.

The invention discloses a preparation method of a rice husk based porous carbon fungaltoxin adsorbent. The preparation method uses rice husks to serve as raw materials, immersion treatment is carried out by using aqueous alkali in certain concentration through low temperature pre-carbonization, and finally firing is carried out under a condition that air is isolated to generate end products of the adsorbent. In a scope from acidic property to neutral, when the concentration of various fungaltoxins is as high as 1mng/mL, removing rate of rice husk based porous carbon on the various fungaltoxins is higher than 98%, adsorption is stable, and desorption rate in 8h is all lower than 5%, so that the rice husk based porous carbon is an excellent fungaltoxin adsorbent. The rice husk based porous carbon is safe, non-toxic and low in content of impurities such as heavy metal, and is an ideal adsorbent product for removing fungaltoxin pollution in foods and feeds.

The invention provides a mineralization-flotation separation column sorting device and method, which are applicable to ore processing. The mineralization-flotation separation column sorting device comprises a stirring barrel, a pump, a bubble generator, a mineralization chamber, a flocculation elimination pipe, a flotation column and an air compressor; after flotation ore slurry is mixed through slurry blending equipment and passes through the bubble generator, the ore slurry enters the cyclone mineralization chamber; the ore slurry which is rotated at a high speed and bubbles are subjected tohigh-strength turbulent flow collision and mineralized bubbles are formed; a large vortex of the mineralized bubbles are eliminated through the flocculation elimination pipe and then the mineralizedbubbles enter a flotation column static sorting region to finish static separation; a flotation assisting baffle plate is arranged at the bottom of the flotation column static separation region and the ore slurry is prevented from entering tailings due to short circuiting; ore grains which are not mineralized and desorbed are subjected to intensive recovery; low-ash clean coal is recycled and high-ash ores are discharged from a tailing opening. According to the mineralization-flotation separation column sorting device, the flotation and falling probability of low-ash coarse grains is effectively reduced and the equipment processing capability is great; the device has strong adaptability on different coal properties, low production and operation cost and is convenient to mount and operate;the quantity and quality of clean coal products are wholly improved.

The invention discloses a novel metal oxide iron-copper composite modified quartz sand filter material, and a preparation method and application thereof. Concretely, the metal oxide iron-copper composite modified quartz sand filter material is prepared by modifying quartz sand with ferric trichloride and copper sulfate as modifying agents by adopting a microwave technology at the same time. The metal oxide iron-copper composite modified quartz sand filter material prepared by using the method in the invention can effectively adsorb organic and inorganic pollutants, heavy metals, phosphorus, etc. in water; the material has a specific surface area which is 8.96 times of the specific surface area of ordinary quartz sand, and has larger adsorption capacity than the ordinary quartz sand; a removal rate of the material to humic acid is 96.58% and is increased by 67.86% than the removal rate of the ordinary quartz sand to the humic acid; and the removal rate of the material to the phosphorus in water is 71.5% to 96.23%. Moreover, the modified quartz sand filter material has higher adhesion strength to pollutants and is reduced in desorption rate to surface metals; meanwhile, the material has low production cost and investment cost and is convenient for industrial production.

The invention discloses a turbulent flow regulating and controlling external particle fluidized bed uniform in turbulence degree and belongs to a mineral separation device. The device comprises a column floating area, a concentrate overflow groove in the upper portion of the column floating area and a middling ore circulating port outside the column floating area; the lower portion of the column floating area is provided with a gas and liquid mixing area; a fluidized bed mineralizing and floating area is arranged between the column floating area and the gas and liquid mixing area; the fluidized bed mineralizing and floating area is provided with a mineralizing area 1, a mineralizing area 2,... and a mineralizing area n; and the interiors of the mineralizing area 1, the mineralizing area 2,...and the mineralizing area n are filled with turbulent flow regulating and controlling particles. According to the turbulent flow regulating and controlling external particle fluidized bed uniform in turbulence degree, mineralizing and floating are totally separated, and are different from current integration of mineralizing and floating; the mineralizing time can be achieved by adjusting the mineralizing area segment number of the fluidized bed mineralizing and floating area, and therefore the kinetic energy utilizing efficiency is very high; the energy dissipating rate is high, the bubble size balance and stable retention of high-pressure gas are guaranteed, and the floating recovery rate is increased; and upper, middle and lower mineralizing fluidized bed layers are provided with different turbulence degrees, and the mineralizing efficiency is high.

The invention discloses a method for detecting polycyclic aromatic hydrocarbon in tea oil. The method comprises the following steps: adding a magnetically hydroxylated multiwall carbon nano tube serving as a solid phase extraction reagent into the tea oil diluted by a normal hexane solvent for adsorption of a target substance, carrying out magnetic separation under the action of an external magnetic field, collecting the solid phase extraction reagent with the target substance, removing supernate, purifying the solid phase extraction reagent with the target substance through a purifier, desorbing the target substance on the solid phase extraction reagent through methylbenzene serving as a desorbent, carrying out magnetic separation under the action of the external magnetic field, removing the solid phase extraction reagent, collecting a desorption solution with the target substance, filtering the desorption solution through an organic filter film, and carrying out conventional content measurement by combining gas chromatography and mass spectrum. The method is high in selectivity, low in detection limit, high in sensitivity and high in standard recovery rate.

The invention relates to a preparation method and application of a sepiolite composite adsorbent loaded with nano zinc sulfide, and belongs to the technical field of environmental protection. The preparation method comprises acid heat treatment of purified sepiolite and zinc sulfide modification of sepiolite subjected to acid heat treatment, i.e., sepiolite is pretreated through acid heat modification, and then nanoscale zinc sulfide is loaded through coprecipitation, so that the efficient heavy metal cadmium composite adsorbent is prepared. The adsorbent obtained by the invention combines theadvantages of high adsorption capacity of nano zinc sulfide and rich pore structure of sepiolite, and cadmium ions in a water body are efficiently removed mainly by generating a solid solution ZnxCd1-xS (x (1). The preparation method disclosed by the invention is simple, low in production cost, high in removal rate of cadmium in wastewater and low in desorption rate, can be used as an adsorbent or a passivator for heavy metal cadmium in water and soil, and has a good application prospect.

The invention belongs to the technical field of chlorine ion curing agents, and especially relates to a chlorine ion curing agent for reinforced concrete and a preparation method and applications thereof. The curing agent is metal dihydroxide with a layered structure, has a micro-nano level granular shape, and is prepared by compounding 50 to 80 parts by weight of CaFe-NO3LDHs and 20 to 50 parts by weight of CaFeAl-NO3LDHs. The prepared chlorine ion curing agent does not damage a cement based material, and can stably and efficiently adsorb chlorine ions in a simulated concrete hole solution. In a cement paste sample, which has been soaked in a sodium chloride solution (3.5%), the corrosive performance of chlorine ions is obviously reduced, the effect is excellent, and the provided chlorineion curing agent is efficient and stable.

Systems and methods are provided for an evaporative emissions control system. In one example, a system for an engine may comprise a fuel vapor canister, a mixing valve positioned in a fresh air line upstream of the vapor canister, and an actuator physically coupled to the mixing valve for adjusting a position of the mixing valve to increase turbulence in air entering the vapor canister. The position of the mixing valve may be adjusted to increase an amount of turbulence in air entering the fuel vapor canister.

The invention discloses a wide-particle-grade coal slime flotation method. The method comprises the following steps that wide-particle-grade coal slime is divided into a coarse particle grade and a fine particle grade, then water is correspondingly added into the coarse particle grade coal slime and the fine coal slime for stirring so as to prepare ore pulp, collecting agents are correspondingly added into the two kinds of ore pulp for stirring, then the two kinds of ore pulp are transferred into a flotation tank, a foaming agent is added, mixing and stirring are carried out, bubbles are fed,and bubble scraping is carried out as to obtain flotation clean coal and tail coal. According to the method, particle-grade pulp preparation is achieved, and a mixing air inflation process is used, sothat the requirements of coal slime pulp mixing performance of different particle grades are met, the dosage of agents is saved, then covering of high-ash fine mud on the surface of the coarse granular coal can be effectively reduced, the quality of the clean coal is improved, the excessive adhesion of the fine-particle-grade coal slime to the collecting agents is reduced, meanwhile, the desorption rate of the coarse coal slime can be reduced, and the recovery rate of the coarse coal slime can be improved; and the particle-grade pulp preparation and the air inflation flotation process are used for improving the recovery rate of coarse particles in the raw coal, the effective recovery of the wide-particle-grade coal slime is realized, and the flotation problem of the wide-particle-grade coal slime is solved.

The present invention discloses a mycotoxin resistant feed additive for pigs and a preparation method and an application thereof. The present invention firstly discloses the mycotoxin resistant feed additive for the pigs. The feed additive comprises lactobacillus rhamnosus, calcined shells and cornstalk charcoal. The preparation method further increases fructus gardeniae and moutan barks on the basis of the mycotoxin resistant feed additive for the pigs, and can significantly improve the removal rate of the mycotoxin, so that the adsorption rates of zearalenone, aflatoxin B1, vomitoxin, etc. can all reach 94% or more, the desorption rates of the toxins are significantly reduced, and the toxin removing is more complete. The raw materials of the lactobacillus rhamnosus, calcined shells, cornstalk charcoal, fructus gardeniae and moutan barks are tested to have obvious synergic effects. The mycotoxin resistant feed additive for the pigs can be used for detoxification of cereals or compound feeds, etc. contaminated by the mycotoxin, prevents the toxic effects of the mycotoxin on the pigs and improves the feed return rate.

The invention relates to a method for modifying organic polymer material and a modified organic polymer material. The method for modifying organic polymer material comprises the following steps: (1) placing the organic polymer material in an atomic layer deposition reaction chamber; (2) introducing a carrier gas into a precursor 1, sealing an atomic layer deposition reaction chamber for 180-600 seconds for the first time, and introducing an inert gas for purging and cleaning; and (3) introducing into a precursor 2 again, and sealing the atomic layer deposition reaction chamber for 180-600 seconds for the second time; wherein the precursor 2 is selected from ammonia plasma or mixed plasma of nitrogen and hydrogen. According to the invention, an ALD technology is utilized, a nitrogen-containing precursor is taken as a main raw material, a nitride is filled into the organic polymer material at proper filling depth and filling density, a film is formed on the surface of the organic polymer material, and the modified organic polymer material with better chemical and mechanical properties is obtained.

The invention discloses a method for regulating heavy metal desorption of a compost extract liquid by adopting a carbon nanomaterial. The method comprises steps as follows: a mixed solution containing three kinds of heavy metal ions including Cu<2+>, Pb<2+> and Cd<2+> is prepared, and a concentration ratio of the three kinds of heavy metal ions is 6:4:1; the prepared heavy metal mixed solution and the compost extract liquid in a mass ratio being 1:2 are mixed; 10 mg of the carbon nanomaterial is weighed and put into a conical flask, 20 ml of the heavy metal mixed solution or 20 ml of the pure compost extract liquid is added to the conical flask, and a mixture is oscillated for 6 h, is filtered and then is measured. The invention further discloses an application of the method for regulating the heavy metal desorption of the compost extract liquid by adopting the carbon nanomaterial in the aspect of increase of desorption rate of the heavy metal including Cu<2+>, Cd<2+> and Pb<2+>. The desorption rate of the heavy metal refers to desorption of Cd, Cu and Pb by the aid of graphene, graphene oxide and multi-walled carbon nanotubes.

The invention relates to a fine mineral separation method combining cavitation pretreatment and carrier flotation, which is suitable for coal separation. The method includes preparing pulp by utilizing fine minerals, adding a collector, then adjusting the pulp, and circulating the adjusted pulp in a venturi cavitation tube to achieve cavitation; preparing carrier particle pulp, adding a collector,and circulating the adjusted carrier particle pulp in a venturi cavitation tube to achieve cavitation; stirring the adjusted fine mineral pulp after cavitation and the adjusted carrier particle pulpafter cavitation according to a ratio, conveying the mixture to a flotation machine, performing flotation to finally obtain a foam product and a tailing product, and recovering carrier particles. Thesteps are simple, the effect is good, the collision probability of fine particles and flotation bubbles is increased, and the selectivity of flotation is improved. The carrier particles are cleaned bycavitation pretreatment and recycled, thus reducing the loss of the carrier particles; cavitated nano-bubbles on the surfaces of the carrier particles can also promote the adhesion of the carrier particles and the flotation bubbles, thus improving the efficiency of carrier flotation.

The invention discloses a composite detoxification agent capable of removing zearalenone. The composite detoxification agent comprises the following raw materials in parts by weight: 30-45 parts of rectorite, 8-19 parts of zeolite, 10-20 parts of sepiolite, 5-17 parts of rice husk charcoal, 5-13 parts of modified konjac glucomannan, 5-15 parts of sodium humate, 1-3 parts of vitamin E, 2-11 parts of compound bacteria and 5-15 parts of surfactants. The composite detoxification agent, which is provided by the invention, capable of removing the zearalenone has a high zearalenone detoxification rate and a stable effect.

The invention discloses a flotation technology for wide-size coal slime. The flotation technology comprises the ore pulp preparation work, the high-pressure jetting work, the bubble removal work and the flotation work in a teetered bed-self-circulation flotation column; the bubble removal technology is added after a self-absorption micro-bubble generator, non-active bubbles are removed through the bubble removal work, the phenomenon that excessive bubbles enter the teetered bed-self-circulation flotation column and form an ultra-thick bubble layer is avoided, the influence of the non-active bubbles on subsequent sorting is eliminated, appropriate common bubbles are generated through a bubble generator of the teetered bed-self-circulation flotation column according to needs, the common bubbles and active micro-bubbles are adjusted for realizing the appropriate proportion by controlling the consumption of bubble forming agents, and therefore the floatation efficiency can be improved to the maximum degree.

The invention relates to a pressurization gas dissolution type coal slime mixing device, and belongs to the technical field of coal slime flotation equipment. The pressurization gas dissolution type coal slime mixing device is used for coal slime flotation pulp mixing treatment. According to the technical scheme, the pressurization gas dissolution type coal slime mixing device comprises a pressurization bin, an ore pulp feeding jetting device, a stirring pulp mixing device and a pressure reduction discharging device; the pressurization bin is of a cylindrical structure, ellipsoid-shaped sealing heads are arranged at the two ends of the pressurization bin, the sealing head at the upper portion is connected with a barrel of the pressurization bin through a detachable flange, the sealing head at the lower portion and the barrel of the pressurization bin are welded, and the ore pulp feeding jetting device, the stirring pulp mixing device and the pressure reduction discharging device are all installed in the pressurization bin. According to the pressurization gas dissolution type coal slime mixing device, the characteristics of aerosol feeding, intense stirring and the like are kept, the gas dissolution time is prolonged, the gas dissolution pressure is improved, the process of microvesicle separation is highlighted, the coal slime mixing effect is strengthened, and adaptability of flotation equipment for inlet flotation ore pulp is strengthened. The pressurization gas dissolution type coal slime mixing device has the beneficial effects that the unit treatment capacity of the flotation equipment can be improved, and agent consumption is reduced; and the pressurization gas dissolution type coal slime mixing device is very suitable for flotation of low-rank coal slime with poor surface hydrophobicity and slime with large particle size.

A vapor storage device is provided. The vapor storage device includes a diffuser plate positioned on an axis of an inlet port and comprising one or more openings extending through the plate from a leading edge to a trailing edge and a dome coupled to the inlet port of the device and the diffuser plate, where the dome includes side walls spaced away from the diffuser plate.

The invention discloses feed capable of improving the body immunity of suckling pigs. The feed is prepared from the following raw materials in parts by weight: 60-80 parts of corn flour, 10-20 parts of peanuts, 15-25 parts of sweet potato powder, 12-18 parts of fish meal, 8-14 parts of dried small shrimp powder, 20-35 parts of fermented bean meal, 25-45 parts of whey powder, 5-9 parts of soybean oil, 8-16 parts of Chinese herbal medicine powder, 1-1.5 parts of a probiotic preparation, 3-7 parts of modified attapulgite and 4-7 parts of nutritional additives, wherein the raw materials of the Chinese herbal medicine powder comprise tuckahoe, haws, dandelion herb, atractylodes rhizome, dried rehmannia roots, radix angelicae sinensis and honey-fried licorice roots; and the raw materials of themodified attapulgite comprise attapulgite, 2,3-epoxy propyl-trimethyl ammonium chloride, a sulfuric acid solution, ethanol and water. The feed disclosed by the invention can reinforce the body immunefunctions of suckling pigs, promote appetite and avoid harm of mycotoxin, thereby reducing mortality and improving the survival rate.