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35results about How to "Alleviate the pressure of shortage" patented technology
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Urban miniature underground reservoir and construction method
ActiveCN104847010AAlleviate the pressure of shortageSolve the floodSewerage structuresWater storageWater use
The invention discloses an urban miniature underground reservoir. The underground reservoir is composed of multiple water storage ponds which are buried underground and connected with municipal administration rainwater drainage pipelines, and the miniature reservoir is located below urban road auxiliary roads and green belts. Rainwater on the roads and the peripheries of the roads can flow into the reservoir through drainage pipes, and when it rains, the rainwater can flow into the miniature reservoir through the drainage pipes to be stored; as tiny holes are formed within the range above the one fourth to one third portion of the side face of the reservoir, water in the miniature reservoir can slowly permeate into a foundation soil body to supplement underground water and improve the underground water environment. The invention further discloses a construction method for the miniature underground reservoir. The miniature underground reservoir can relieve pressure of the municipal administration rainwater drainage pipelines, improve the municipal water use capacity, supplement the underground water and improve the underground water environment, and therefore the miniature underground reservoir has large social benefits and high ecological value.
Owner:CHONGQING UNIV
Coal cinder powder magnesium oxysulfate cement stable recycled concrete aggregate and preparation method thereof
The invention discloses a coal cinder powder magnesium oxysulfate cement stable recycled concrete aggregate. The aggregate is prepared by evenly mixing the following ingredients in percentage by mass:93-97% of recycled concrete aggregate, 1.56-3.12% of magnesium oxide, 0.57-1.90% of coal cinder powder, 0.76-1.80% of magnesium sulfate and 0.09-0.18% of a water-resistant additive. The invention further discloses a preparation method of the coal cinder powder magnesium oxysulfate cement stable recycled concrete aggregate. The coal cinder powder magnesium oxysulfate cement stable recycled concrete aggregate has the characteristics of convenient material taking, energy saving and environmental protection, and is a novel building material; the aggregate utilizes solid wastes such as waste concrete, coal cinder and bischofite in large quantity, the environmental protection and land occupying problems caused by waste concrete and coal cinder are solved, increasingly scarce sandstone and cement resources are relieved, the applied range of magnesium oxysulfate cement is expanded, and the aggregate has a far-reaching impact and a broad application prospect; and the aggregate does not have lateral confinement compressive strength, which meets the standard requirements, and the construction progress can be accelerated.
Owner:NANCHANG INST OF TECH
Straw feed and preparation method thereof
ActiveCN102132762BTake advantage ofHigh protein contentAnimal feeding stuffWorking-up animal fodderFungicideTwo step
The invention provides a straw feed and a preparation method thereof, relating to the technical field of environmental protection, in particular to a straw fermentation fungicide and preparation thereof. The method comprises two steps of aerobic fermentation and one step of anaerobic fermentation to prepare the straw feed, and specifically comprises the steps of crushing straws; preparing mixed bacteria liquid of aerobic degraded cellulose so as to conduct the aerobic fermentation on straw powder; preparing mixed fermentation bacteria liquid to conduct the aerobic fermentation on the straw powder; preparing lactic acid bacteria liquid so as to conduct the anaerobic fermentation on the straw powder; and drying the fermented straw feed and pelletizing. The method improves the utilization ratio of lignin, cellulose and hemicellulose in straws, crude protein contents in a fermented product are increased, and the straw is converted into a super poultry feed.
Owner:NANKAI UNIV
Method for removing impurities from gentamicin
InactiveCN102633848AAlleviate the pressure of shortageImprove product qualitySugar derivativesSugar derivatives preparationActivated carbonGentamicin
The invention belongs to the technical field of pharmaceutical preparation, and provides a method for removing impurities from gentamicin. The method is characterized by comprising the following steps of: diluting a gentamicin concentrated solution, adjusting the pH value, slowly adsorbing the gentamicin concentrated solution to a weak-acidity cation exchange resin column, then adding ammonia water for washing and removing the impurities, slowly desorbing the gentamicin by the ammonia water, and performing vacuum concentration, sulfuric acidification, activated carbon decoloration and spray drying on the desorbed solution. According to the method, the yield is up to 65% or so, and the quality of a product is improved; the product which meets the quality requirement of a new pharmacopeia is obtained; and the pressure of short supply of high-quality gentamicin in the existing market is relieved to a certain extent.
Owner:南阳普康药业有限公司
Sewage reuse system and sewage treatment method
InactiveCN104986922AAlleviate shortagesAchieve recyclabilityGeneral water supply conservationEnergy based wastewater treatmentWater useWater treatment system
The invention discloses a sewage reuse system and a sewage treatment method. The sewage reuse system comprises a sewage treatment system and a reclaimed water reuse system, wherein the sewage treatment system comprises a primary water treatment system and a secondary water treatment system, the primary water treatment system is used for treating domestic produced sewage to form wastewater and reuse water, and the secondary water treatment system is used for treating the reuse water to form residential domestic water and reclaimed water; and the reclaimed water reuse system is used for conveying treated waters from the sewage treatment system to different use occasions according to the quality of waters. The treatment method comprises the following steps: treating the domestic production sewage by the primary treatment system to form wastewater and reuse water, and treating the reuse water to obtain domestic water consumption standard reaching water used as the residential domestic water and domestic water consumption standard unreaching water used as the reclaimed water. The above technical scheme alleviates the shortage of water resource and the pressure of pollution discharge and environmental protection.
Owner:SANDA WATER BEIJING TECH CO LTD
Coal slag powder chlorine-oxygen-magnesium cement stable regenerated concrete aggregate and preparation method thereof
Owner:NANCHANG INST OF TECH
Electrical appliance mainboard and model selection port control circuit and method
The invention discloses an electrical appliance mainboard and a model selection port control circuit and a method. The model selection port control circuit comprises a switch unit and a control unit, wherein a first end of the switch unit is used for connecting a mainboard power source of an electrical appliance, and a second end of the switch unit is used for connecting a model selection port of the electrical appliance; and the first end of the control unit is used for connecting the mainboard power source of the electrical appliance, the second end of the control unit is connected with a third end of the switch unit for controlling the switch unit to be closed to enable the model selection port to be electrified when the electrical appliance is electrified and controlling the switch unit to be powered off to enable the model selection port to lose power after a preset electrify time of the electrical appliance is due, wherein the preset time is larger than or equal to the time for obtaining the model information of the electrical appliance of the electrical appliance mainboard through the model selection port. By means of the electrical appliance mainboard and the model selection port control circuit and the method, energy consumption can be effectively restrained, and energy shortage pressure can be remitted.
Owner:GREE ELECTRIC APPLIANCES INC
Ultralow-frequency rubber tapping method for rubber trees
PendingCN113491230AReduce the magnitude of the cutSave barkForestryHorticulture methodsAgricultural engineeringEthephon
The invention relates to an ultralow-frequency rubber tapping method for rubber trees, which is based on a traditional semi-spiral rubber tapping mode. A novel rubber tapping method for the rubber trees is established by changing the rubber tapping frequency and matching with a proper ethephon stimulation method, rubber tapping thickness and rubber tapping depth. By applying the method, the dry rubber content is increased, the bark consumption of the rubber trees is saved, the great reduction of the dry rubber yield caused by the reduction of the rubber tapping frequency is effectively controlled, the per capita dry rubber yield is increased, the income of rubber workers is increased, the rubber worker team is stabilized, the pressure of shortage of the rubber workers is effectively relieved, and the method has good production significance and popularization prospects. According to the ultra-low-frequency rubber tapping method for the rubber trees, the frequency adopted in the rubber tapping method is generally low-frequency rubber tapping such as three-day one-time cutting or four-day one-time cutting, one rubber worker is divided into three tree positions or four tree positions, the income of the rubber worker is in direct proportion to the rubber yield obtained through rubber tapping, and the rubber worker income is increased, and the rubber worker team is stabilized.
Owner:广东农垦热带作物科学研究所 +1
Energy-saving saline-alkali water multi-stage freezing desalination device and process
PendingCN112875966AImprove work efficiencyAlleviate the shortage of fresh water resourcesGeneral water supply conservationTreatment involving filtrationPre treatmentDesalination
The energy-saving saline-alkaline water multi-stage freezing desalination device and process, and the device comprises a pretreatment system and a freezing system, saline-alkaline water is treated by the pretreatment system and then enters the freezing system to be cooled and desalted, and the energy-saving saline-alkaline water multi-stage freezing desalination device is characterized in that: the pretreatment system comprises a water storage tank, a high-density sedimentation tank, a V-shaped filter tank and a multi-medium filter; the water storage tank is connected with a water inlet of the high-density sedimentation tank through a pipeline, a water outlet of the high-density sedimentation tank is connected with a water inlet of the V-shaped filter tank through a pipeline, a water outlet of the V-shaped filter tank is connected with a water inlet of the multi-medium filter through a pipeline, and a water outlet of the multi-medium filter is connected with the freezing system through a pipeline; a zero-pollution saline-alkali water purification process is achieved in the whole process, safety and environmental protection are achieved, the working efficiency is high, the pressure of fresh water resource shortage is greatly relieved, and a guarantee is provided for the life of people.
Owner:TARIM UNIV
Enrichment and separation method of cadmium in waste circuit board multi-metal hybrid resources
The invention belongs to the technology of comprehensive recycling of complex nonferrous metal secondary resources, and particularly relates to an enrichment and separation method of cadmium in waste circuit board multi-metal hybrid resources. The method includes the steps that firstly, a multi-metal complex mixture containing cadmium is obtained from a waste circuit board through smashing and sorting; a separating agent is added into the multi-metal complex mixture; the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, trapping agent lead and a trace enrichment reagent are added; and cadmium is selectively enriched in a lead liquid phase, a separation melt with liquid copper on the upper layer and liquid lead on the lower layer is formed, and the liquid copper on the upper layer and the liquid lead trapping cadmium on the lower layer are poured out respectively. Thus, cadmium is separated from the multi-metal complex mixture of the waste circuit board and is further recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Complete pellet feed for fattening sheep, preparation method of complete pellet feed and method for feeding sheep
PendingCN111642637AImprove utilization efficiencyIncrease production capacityFood processingAnimal feeding stuffNutritive valuesWheat Brans
The present invention discloses a complete pellet feed for fattening sheep, a preparation method of the complete pellet feed for fattening the sheep and a method for feeding the sheep, and relates tothe technical field of animal feeds. The complete pellet feed for fattening the sheep comprises the following raw materials: 0%-10.7% of corn stalks, 0%-9.3% of alfalfa hay, 10%-30% of agriophyllum squarrosum stalks, 38%-42% of corn, 5%-6% of wheat bran, 10%-11% of soybean meal, 6%-7% of cottonseed meal, 2%-3% of molasses, 0.8%-1.2% of stone powder, 0.5%-1% of edible salt, 1%-1.5% of baking soda and 0.8%-1.2% of a premix. The complete pellet feed for fattening the sheep is high in nutritional value and feed utilization rate, can improve sheep production performance and sheep meat quality, increases economic benefits of herdsmen, relieves pressure of forage shortage, and also has advantages of safety and harmlessness.
Owner:NORTHWEST INST OF ECO-ENVIRONMENT & RESOURCES CAS
Liquid hydrogen fuel carrying and heat exchanging system of hydrogen fuel high speed airplane
InactiveCN1259219CReduce take-off weightImprove push mass ratioFuel systems for specific fuelsTransportation hydrogen technologyCombustion chamberProcess engineering
A liquefied hydrogen fuel carrying and heat exchanging system for high-speed airplane using hydrogen as fuel is composed of master liquefied hydrogen tank, the liquefied hydrogen tanks hidden in wings, the liquefied hydrogen tanks hidden in main body, cut-off valves, liquefied trunk, two evaporators, combustion chamber of engine, hydraulic oil heat exchanger, lubricating oil heat exchanger, hydraulic system, fans and lubricating system. It features that the cold of liquefied hydrogen is transferred to hydraulic system and lubricating system.
Owner:SHANGHAI JIAO TONG UNIV
Method for preparing cement kiln fuel from lignite and biomass co-pyrolysis product
The invention relates to a method for preparing a cement kiln fuel by using a lignite and biomass co-pyrolysis product, and the method comprises the following steps: 1) respectively drying lignite andbiomass and respectively crushing the lignite and the biomass to obtain a lignite sample and a biomass sample; 2) mixing the biomass sample and the lignite sample evenly according to the mass ratio of 3: 7 to 4: 6, and performing oxygen-free pyrolysis on the mixed sample; 3) obtaining pyrolysis products after pyrolysis, wherein the pyrolysis products comprise a pyrolysis gas, pyrolysis tar and pyrolysis semi-coke; and 4) mixing the pyrolysis semi-coke with the lignite to obtain the cement kiln combustion fuel. The method has the advantages of simple operation and low cost, uses low-grade coalas a raw material to prepare the excellent cement kiln substitute fuel, and opens a new energy supply idea for the cement industry; at the same time, the utilization efficiency of biomass resources and lignite resources is improved, and the comprehensive and clean utilization of all solid, liquid and gas resources of the products is realized.
Owner:WUHAN UNIV OF SCI & TECH
Rainwater collection device for municipal garden based on rainwater recycling technology
InactiveCN111705886ARealize collection and reuseAvoid submersionFatty/oily/floating substances removal devicesSewerage structuresWater sourceWater resources
The invention discloses a rainwater collection device for a municipal garden based on a rainwater recycling technology. The rainwater collection device comprises an adjusting lake, wherein a drainageslope sleeves the edge of the top end of the adjusting lake; a plane slope sleeves the outer side of the drainage slope; a slope lawn is arranged on the drainage slope; a garden green plant zone is arranged on the plane slope; a road body is arranged on one side of the plane slope; a water collection device is embedded into the road body; a plurality of watering disc mechanisms are uniformly arranged above a water supply pipe; water in the adjusting lake is pumped through an irrigation pump, so that lake water is injected into the water supply pipe through a first water pipe, and then is injected into the watering disc mechanisms through vertical pipes; finally, the slope lawn and rhizomes of the garden green plant zone are directly irrigated through the watering disc mechanisms, so that the collection and recycling of rainwater are realized; waterlogging caused by heavy rain can be adjusted and a city is prevented from being submerged by the rainwater; and urban garden vegetation is irrigated by utilizing the rainwater, so that the consumption of a water source can be effectively reduced, rainwater resources are sufficiently utilized and the pressure of water source shortage is alleviated.
Owner:蔡冀奇
A kind of urban micro underground reservoir and construction method
ActiveCN104847010BAlleviate the pressure of shortageImprove flood storage capacitySewerage structuresWater useSocial benefits
The invention discloses an urban miniature underground reservoir. The underground reservoir is composed of multiple water storage ponds which are buried underground and connected with municipal administration rainwater drainage pipelines, and the miniature reservoir is located below urban road auxiliary roads and green belts. Rainwater on the roads and the peripheries of the roads can flow into the reservoir through drainage pipes, and when it rains, the rainwater can flow into the miniature reservoir through the drainage pipes to be stored; as tiny holes are formed within the range above the one fourth to one third portion of the side face of the reservoir, water in the miniature reservoir can slowly permeate into a foundation soil body to supplement underground water and improve the underground water environment. The invention further discloses a construction method for the miniature underground reservoir. The miniature underground reservoir can relieve pressure of the municipal administration rainwater drainage pipelines, improve the municipal water use capacity, supplement the underground water and improve the underground water environment, and therefore the miniature underground reservoir has large social benefits and high ecological value.
Owner:CHONGQING UNIV
Sand-base composite soil
ActiveCN102405819BImprove permeabilityImprove water retentionCultivating equipmentsSoilless cultivationPaleozoicMesozoic
Owner:陕西地建土地工程技术研究院有限责任公司
Enrichment and separation method of cobalt in waste circuit board multi-metal hybrid resources
ActiveCN105039709ASimple and easy separabilitySimple methodProcess efficiency improvementNiobiumLiquid copper
The invention belongs to the technology of comprehensive recycling of complex secondary nonferrous metal resources, and particularly relates to an enrichment and separation method of cobalt in waste circuit board multi-metal hybrid resources. The method includes the steps that firstly, a multi-metal complex mixture containing cobalt is obtained from a waste circuit board through smashing and sorting; a collecting agent is added into the multi-metal complex mixture; the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, trace enrichment reagent niobium or boron is added to regulate the separation rate of liquid copper and liquid iron; a liquid copper and liquid iron mixed melt is a separation melt, the upper layer of the separation melt is the liquid iron, and the lower layer of the separation melt is the liquid copper; and the liquid iron gathering cobalt on the upper layer is poured out, and cobalt is separated from the multi-metal complex mixture of the waste circuit board to be recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Cinder powder magnesium oxysulfide cement stabilized recycled concrete aggregate and preparation method thereof
The invention discloses a cinder powder magnesium oxysulfate cement stabilized recycled concrete aggregate, which comprises uniformly mixed components with the following mass content: 93%-97% recycled concrete aggregate, 1.56%-3.12% oxidized Magnesium, 0.57%-1.90% cinder powder, 0.76%-1.80% magnesium sulfate, and 0.09%-0.18% water-resistant additive. The invention also discloses a preparation method of the above-mentioned cinder powder magnesium oxysulfate cement stabilized recycled concrete aggregate. The cinder powder magnesium oxysulfide cement stabilized recycled concrete aggregate of the present invention has the characteristics of convenient material acquisition, energy saving and environmental protection, and is a new type of building material; it uses a large number of solid wastes such as waste concrete, cinder, bischofite, etc., and can solve the problem of The environmental protection and land occupation problems caused by waste concrete and cinder, as well as the relief of the increasingly scarce sandstone and cement resources, and the expansion of the application range of magnesium oxysulfate cement have far-reaching influence and broad application prospects; and its unconfined compressive strength Meet the specification requirements, can speed up the progress of the construction.
Owner:NANCHANG INST OF TECH
Memory management method and device, electronic equipment and storage medium
PendingCN114116215AAlleviate the pressure of shortageAvoid delayResource allocationTerm memoryMemory reclamation
The invention relates to a memory management method and device, electronic equipment and a storage medium, and the method comprises the steps: after data cached in a current ION memory is used, judging whether the total amount of the ION memory occupied by an ION pool is greater than or equal to a memory release threshold value or not; and if the total amount of the ION memory occupied by the ION pool is greater than or equal to the memory release threshold, releasing the current ION memory to an operating system. Therefore, a series of problems caused by excessive memory occupation of the ION pool can be effectively prevented, the pressure of system memory shortage is relieved, meanwhile, the memory is actively released to the operating system, and delay caused by waiting for memory recovery is also avoided.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
High-efficiency heat recovery unit for temperature wastewater
ActiveCN106016828BIncrease profitLow costHeat pumpsRefrigeration safety arrangementWaste heat recovery unitBathing water
The invention belongs to the field of waste heat recovery devices, and relates to a device for recovering waste heat of living hot water and production hot water such as water in swimming pools, bathing water and water for factories, in particular to a high-efficiency heat recovery unit for waste hot water. The high-efficiency heat recovery unit for waste hot water comprises a waste water processing device, a first-stage heat recovery device and a second-stage heat recovery device. Through the waste water processing device, the first-stage heat recovery device and the second-stage heat recovery device, the waste heat utilization efficiency can be greatly improved, cost can be greatly reduced for residents, factories, hospitals, schools, bathing, business and other places needing hot water, and the pressure of energy shortage in China is relieved. In addition, the high-efficiency heat recovery unit for waste hot water is applicable to large-scale production and convenient to operate.
Owner:山东海乐新能源科技有限公司
Preparation method and application of material for adsorption removal of organic matter and ammonia nitrogen
InactiveCN110433783AAlleviate water scarcityImprove adsorption capacityOther chemical processesWater contaminantsMolecular sieveCoal
The invention discloses a preparation method of a material for adsorption removal of organic matter and ammonia nitrogen. The preparation method comprises the following steps that (1) clinoptilolite is selected from natural zeolite, cleaned and elutriated through distilled water for three times; (2) stirring is conducted for 30 min in a high-speed stirring machine, and then precipitation is conducted; (3) upper turbid liquid is removed through a sieve net of 100 meshes; (4) the cleaned clinoptilolite is dried for 24 h in a drying oven at 100 DEG C; (5) a material A is prepared; (6) a materialB is prepared; (7) a material C is prepared; (8) a material D is prepared; (9) a material E is prepared; (10) a material F is prepared; (11) a material G is prepared; (12) a material H is prepared; (13) a material I is prepared; (14) a material J is prepared; and (15) a final adsorption material K is prepared. The natural zeolite and coal ash which are low in cost and easy to obtain are taken as basic raw materials, the natural zeolite is modified by NaCl and then mixed with a 4A molecular sieve prepared from the coal ash according to a certain ratio, thus the novel adsorption material is obtained, and the material has a great organic matter and ammonia nitrogen adsorption effect.
Owner:ANHUI MEIZIRAN ENVIRONMENTAL TECH
Method for removing impurities from gentamicin
InactiveCN102633848BAlleviate the pressure of shortageImprove product qualitySugar derivativesSugar derivatives preparationActivated carbonAmmonia
The invention belongs to the technical field of pharmaceutical preparation, and provides a method for removing impurities from gentamicin. The method is characterized by comprising the following steps of: diluting a gentamicin concentrated solution, adjusting the pH value, slowly adsorbing the gentamicin concentrated solution to a weak-acidity cation exchange resin column, then adding ammonia water for washing and removing the impurities, slowly desorbing the gentamicin by the ammonia water, and performing vacuum concentration, sulfuric acidification, activated carbon decoloration and spray drying on the desorbed solution. According to the method, the yield is up to 65% or so, and the quality of a product is improved; the product which meets the quality requirement of a new pharmacopeia is obtained; and the pressure of short supply of high-quality gentamicin in the existing market is relieved to a certain extent.
Owner:南阳普康药业有限公司
Enrichment and separation method of chromium in multi-metal mixed resources of waste circuit boards
ActiveCN105039707BSimple methodEfficient synthesisProcess efficiency improvementLiquid copperLiquid iron
The invention belongs to the technology for comprehensive recycling of complex secondary non-ferrous metal resources, and particularly relates to an enrichment and separation method for chromium elements in a discarded circuit board multi-metal mixed resource. The method includes the steps that firstly, after discarded circuit boards are crushed and separated, a multi-metal complex mixture containing the chromium elements is obtained; a trapping agent is added into the multi-metal complex mixture, and the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the multi-metal complex mixture is completely melted, a trace amount of enrichment reagent phosphorus is added, the separation rate of liquid copper and liquid iron is adjusted, and the chromium elements are enriched into a liquid iron phase so that separated melt with the upper layer being the liquid iron and the lower layer being the liquid copper can be formed; and the upper layer liquid iron with the trapped chromium elements is poured out. Accordingly, the chromium elements are separated from the multi-metal complex mixture of the discarded circuit boards and are further recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Lime coal cinder powder stable regeneration concrete aggregates and preparation method thereof
InactiveCN108726911AAlleviate the pressure of shortageReduce pollutionSolid waste managementCompressive strengthUltimate tensile strength
The invention discloses lime coal cinder powder stable regeneration concrete aggregates. The lime coal cinder powder stable regeneration concrete aggregates comprises the following components which are uniformly mixed in percentages by mass: 75%-85% of recycled concrete aggregates, 3%-10% of lime and 12%-20% of coal cinder powder as well as a composite additive which accounts for 2.0%-35% of the mass of the coal cinder powder. The invention further discloses a preparation method of the lime coal cinder powder stable regeneration concrete aggregates. The lime coal cinder powder stable regeneration concrete aggregates have the characteristics of convenience in material taking, energy conservation and environmental protection, and is a novel building material; solid wastes such as waste concrete and coal cinder are extensively utilized, problems of environmental pollution caused by waste concrete and coal cinders and land occupation can be solved, growing shortage of gravels and cement resources is relieved, and the lime coal cinder powder stable regeneration concrete aggregates have far-reaching influence and wide application prospect; and moreover, the unconfined compressive strength of the lime coal cinder powder stable regeneration concrete aggregates meets the code requirement, and the progress of construction can be accelerated.
Owner:NANCHANG INST OF TECH
Enrichment and separation method of bismuth element in multi-metal mixed resources of waste circuit boards
The invention belongs to the comprehensive recycling technology of a complex secondary resource of non-ferrous metal, in particular to a method for enriching and separating bismuth elements in a polymetallic mixed resource of waste printed circuit boards. The method comprises the following steps: firstly, after the waste printed circuit boards are crushed and sorted, obtaining a polymetallic complex mixture containing the bismuth elements; adding a separating agent in the polymetallic complex mixture, and putting the prepared polymetallic complex mixture in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, adding a lead trapping agent, then adding a trace of enrichment agent, therefore enabling the bismuth elements to be selectively enriched into a lead liquid phase, and enabling a melt in the crucible to generate liquid phase layering to form a separated melt with liquid copper on the upper layer and liquid lead on the lower layer; respectively pouring out the upper-layer liquid copper and the lower-layer liquid lead trapped with the bismuth elements. Thus, bismuth is separated from the polymetallic complex mixture of the waste printed circuit boards and is recycled. The method is simple and easy and has the characteristics of low cost, integrated high efficiency and no pollution.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Method for preparing active carbon
InactiveCN101497439BAvoid secondary crackingReduce the overall heightActivated carbonResource utilization
The present invention relates to a method for preparing active carbon, which comprises the following steps: crushing, sieving and drying woody raw materials, soaking the raw materials into a zinc chloride solution according to the mass ratio of the raw materials to zinc chloride of 1:1-4, and drying the solution; performing cracking activation under the vacuum condition, wherein the temperature rise rate is between 5 and 15 DEG C per minute, and the cracking final temperature is between 400 and 500 DEG C; maintaining at the cracking final temperature for approximately 1 hour; and performing acid washing, water washing and drying on the reaction product to obtain the product, namely the active carbon. Compared with active carbon prepared under the condition of normal pressure, the active carbon prepared by the method has the advantages that the micropore rate is improved by 5.34 to 13.18 percent, the specific surface area is increased by 6.21 to 20.31 percent, and the adsorption performance is superior. Moreover, a byproduct, namely biological oil, can be collected when the active carbon is obtained simultaneously, so that the resource utilization rate is high and the energy consumption is reduced.
Owner:CENT SOUTH UNIV
Enrichment and separation method of cadmium in multi-metal mixed resources of waste circuit boards
ActiveCN105039710BEfficient synthesisLow costProcess efficiency improvementLiquid copperNonferrous metal
The invention belongs to the technology of comprehensive recycling of complex nonferrous metal secondary resources, and particularly relates to an enrichment and separation method of cadmium in waste circuit board multi-metal hybrid resources. The method includes the steps that firstly, a multi-metal complex mixture containing cadmium is obtained from a waste circuit board through smashing and sorting; a separating agent is added into the multi-metal complex mixture; the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, trapping agent lead and a trace enrichment reagent are added; and cadmium is selectively enriched in a lead liquid phase, a separation melt with liquid copper on the upper layer and liquid lead on the lower layer is formed, and the liquid copper on the upper layer and the liquid lead trapping cadmium on the lower layer are poured out respectively. Thus, cadmium is separated from the multi-metal complex mixture of the waste circuit board and is further recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Light color adjustable valence alternation manganese ion doped aluminate luminescent material and preparation method thereof
InactiveCN102876325BEasy to prepareEasy to operateEnergy efficient lightingLuminescent compositionsChemical compositionManganese
The invention discloses a light color adjustable valence alternation manganese ion doped aluminate luminescent material and a preparation method thereof. The chemical composition of the material is shown as Ca1-jAl12O19:iMnx+,jLn<3+>, wherein Ln is one of La<3+>, Bi<3+>, Sm<3+>, Nd<3+> and Tm<3+>; i is more than or equal to 0.01 percent and less than or equal to 1.0 percent, j is more than 1 percent and less than or equal to 7.0 percent, and x is equal to 2 or 4. A high-temperature solid phase method is adopted by the preparation method; and the preparation method comprises the following steps of: fully grinding the solid raw materials and uniformly mixing the ground raw materials according to a stoichiometric proportion; sintering by two steps by the high-temperature solid phase method; and cooling to obtain the product. Manganese ions are automatically reduced in air through charge compensation. The material can emit red light or green light and or red light and green light when exposed under ultraviolet rays. The light color of the material can be regulated by the concentration of trivalent doped ions and valance states of manganese ions, and the material is suitable for two-primary color and three-primary color white light-emitting diodes (LEDs).
Owner:WENZHOU UNIV
Enrichment and separation method of cobalt element in waste circuit board multi-metal mixed resources
ActiveCN105039709BSimple methodEfficient synthesisProcess efficiency improvementLiquid copperNiobium
The invention belongs to the technology of comprehensive recycling of complex secondary nonferrous metal resources, and particularly relates to an enrichment and separation method of cobalt in waste circuit board multi-metal hybrid resources. The method includes the steps that firstly, a multi-metal complex mixture containing cobalt is obtained from a waste circuit board through smashing and sorting; a collecting agent is added into the multi-metal complex mixture; the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the metal mixture is completely melted, trace enrichment reagent niobium or boron is added to regulate the separation rate of liquid copper and liquid iron; a liquid copper and liquid iron mixed melt is a separation melt, the upper layer of the separation melt is the liquid iron, and the lower layer of the separation melt is the liquid copper; and the liquid iron gathering cobalt on the upper layer is poured out, and cobalt is separated from the multi-metal complex mixture of the waste circuit board to be recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Enrichment and separation method for chromium elements in discarded circuit board multi-metal mixed resource
ActiveCN105039707ASimple and easy separabilitySimple methodProcess efficiency improvementLiquid copperPollution
The invention belongs to the technology for comprehensive recycling of complex secondary non-ferrous metal resources, and particularly relates to an enrichment and separation method for chromium elements in a discarded circuit board multi-metal mixed resource. The method includes the steps that firstly, after discarded circuit boards are crushed and separated, a multi-metal complex mixture containing the chromium elements is obtained; a trapping agent is added into the multi-metal complex mixture, and the prepared multi-metal complex mixture is placed in a graphite crucible of a vacuum furnace; after the multi-metal complex mixture is completely melted, a trace amount of enrichment reagent phosphorus is added, the separation rate of liquid copper and liquid iron is adjusted, and the chromium elements are enriched into a liquid iron phase so that separated melt with the upper layer being the liquid iron and the lower layer being the liquid copper can be formed; and the upper layer liquid iron with the trapped chromium elements is poured out. Accordingly, the chromium elements are separated from the multi-metal complex mixture of the discarded circuit boards and are further recycled. The method is simple and easy to implement and has the characteristics of being low in cost, comprehensive, efficient, free of pollution and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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