801results about How to "High recovery rate" patented technology

The invention relates to a method for ore dressing, in particular to a method for the ore dressing of a copper-lead-zinc poly-metallic sulfide ore. The method consists of crude ore dressing, ore grinding, copper-lead bulk flotation, copper-lead separation and zinc flotation, wherein in the process of the copper-lead bulk flotation, ore dressing reagents BP, No.25 aerofloat and ethylic-butyl xanthate are adopted as collecting agents for copper and lead ores, and zinc sulfate, sodium carbonate and sodium sulfide are adopted as inhibitors for zinc ores; and in the process of the copper-lead separation, active carbon is adopted to perform reagent removal, sodium sulfite, CMC and water glass are adopted as the inhibitors for lead ores, and No.Z-200 as the collecting agent for copper ores. The method has good metallic mineral separation effect and high metal recovery rate, is simple, is easy to operate, and is suitable for popularization and application.

A method for dressing the complex copper oxide ore consisting of the copper oxide ore easy to dress and the copper oxide ore difficult to dress includes such steps as preparing multiple kinds of composite dressing chemical, floatation for the fine-particle copper oxide ore easy to dress, removing mud, forced floatation for the coarse-particle copper oxide ore difficult to dress, grinding the specially complex copper oxide ore, and forced floatation.

The invention discloses a production technology of high-purity vanadium pentoxide and a treatment method of ammonia-nitrogen wastewater. The production technology concretely comprises the following steps of: carrying out hydrolysis and molybdenum precipitation on a pentavalent vanadium solution, removing impurities by taking sulfuric acid-ammonium sulfate solution as an impurity removing agent after obtaining red vanadium, burning the purified red vanadium to obtain high-purity vanadium pentoxide; in addition, cooling via liquid and crystallizing sodium sulfate after molybdenum precipitation, returning to the pentavalent vanadium solution production procedure to use in cycle; supplying sulfuric acid and ammonium sulfate to the solution to prepare a cleaning agent after removing sodium of cooled and crystallized sodium sulfate from the purified liquid of red vanadium, and returning to the red vanadium impurity-removing procedure to use in cycle. The refined vanadium prepared by the production technology is high in purity, less in reagent dosage, and free of ammonia-nitrogen wastewater discharge; and the entire craft process is closed cycle of water, and low in production cost.

The invention relates to a method for recovering rare earth from waste rare earth luminescent material, comprising the following steps: collection of waste rare earth luminescent material, including quick identification on rare earth fluorescent lamp and dismantling and breaking of the rare earth fluorescent lamp, breaking of a CRT display, and peeling and collection of the waste rare earth luminescent material and a glass matrix; pretreatment on the waste rare earth luminescent material, including demercuration oxidation precipitation, alkali fusion and acidolysis; extraction separation of rare earth elements to obtain rare earth chloride enrichment; extraction purification of the rare earth elements to obtain high-purity rare earth chloride; precipitation separation of the rare earth elements to obtain oxalate rare earth or carbonic acid rare earth precipitates; and sintering of the oxalate rare earth or carbonic acid rare earth precipitates to obtain high-purity-level rare earth oxide. The method realizes separation of rare earth elements including Ce, Eu, Tb and Y from impurity elements including Mg, Ba, Ca and the like and complete separation and recovery of light, mediate and heavy rare earth elements, and purification is carried out to obtain the high-purity rare earth oxide, so that the resources are comprehensively recycled, the process flow is reasonable, economic and practical, the rare earth recovery rate is high and the added value of the product is high.

The present invention relates to a non-pillar sublevel caving method. The non-pillar sublevel caving method which loads and transports ores directly is characterized by comprising the steps as follows: two or more dipheads are tunneled downwards at the position of an orebody near a heading side along the orebody tendency and are used as main haulageways; segmented haulageways are tunneled from the dipheads to divide the orebody into segments; a stoping drift is tunneled from the segmented haulageways; the inner end of the stoping drift is tunneled a cutting roadway and a cutting winze; a vertical upward or oblique upward cutting slot medium and deep hole is drilled at the top plate of the cutting roadway, and the cutting slot is explored and formed on the cutting winze as a free surface; a mining medium and deep hole is drilled in the whole stoping drift, and the mining medium and deep hole of the stoping drift is explored on the cutting slot as the free surface to break ores; the ores are drawn under overlying rocks at the end of the stoping drift, and the ores are loaded on a tramcar directly to be transported out; when stoping, the processed of exploring the mining medium and deep hole, ore drawing and transporting out the ores are processed in the stoping drift, and the retreating mining is circulated until the stoping drift is mined completely. The non-pillar sublevel caving mehod has low cost, high ore recovery ratio, safe production and wide application range.

The invention provides a method for reclaiming rare noble metals from a waste circuit board. The method comprises the following steps of: crushing, performing electrostatic separation, calcining, performing acid leaching, and extracting silver, gold, platinum and palladium respectively. The method can realize maximization of valuable metal resource recycle, can reclaim various rare noble metals respectively, and is high in recovery rate, simple in operation of the reclaiming process, low in energy consumption and environment-friendly.

The invention provides a method for recovering lithium from a lithium-containing electrode waste material. The method comprises the following steps of (1) roasting the lithium-containing electrode waste material under a reducing atmosphere, after roasting, cooling under a protective atmosphere to obtain a reduced material, leaching the reduced material through a leaching agent, and carrying out solid-liquid separation to obtain a lithium-containing solution and solid slags; (2) preparing the lithium-containing solution in the step (1) into a lithium-containing product. According to the methodprovided by the invention, a reducing gas is adopted for reducing roasting, so that the roasting temperature is low, and the energy consumption is less; and one-step leaching is carried out after reducing, so that high-efficient separation of lithium and other metal elements can be realized, the concentration of the lithium in the leaching agent is high, the recovery rate of the lithium is greatlyimproved, the recovered lithium-containing product has high purity, and in addition, other transition metal elements in the waste electrodes can be further recovered. The method provided by the invention is short in flow, low in cost, and easy to realize industrial application.

The invention discloses a method for efficiently and cleanly recovering platinum group metals from a spent automobile catalyst, which comprises the following steps: (1) smelting and collection: mixing the spent automobile exhaust catalyst with a collector, a reducer and a slag former, and carrying out high-temperature smelting to obtain a collected metal-platinum group metal alloy; (2) alloy phase oxidation and converting: blowing oxidizing gas into the collected metal-platinum group metal alloy to perform converting; (3) high-grade platinum group metal enrichment dissolution and separation: carrying out oxidizing solvent dissolution and ion-exchange separation to obtain a platinum group metal solution, adding alkali into the exchange raffinate to neutralize and precipitate, and returning the precipitate as the collector for the smelting step; and (4) platinum group metal refinement: refining and purifying the platinum group metal solution to obtain the platinum group metal product. The method efficiently recovers the platinum group metals; the recovery rate of the platinum group metals is greater than 99%, and the platinum+palladium+rhodium content in the smelting slag is less than 10g/t; and the collector can be recycled, so that the method is clean and pollution-free and can easily implement industrialization.

The invention discloses a method for separating iron, vanadium and titanium from vanadium-titanium magnetite. The method includes the steps that firstly, after the vanadium-titanium magnetite is smashed, an additive and/or reductant and an adhesive are added, and a pellet or a briquette is prepared; secondly, reduction roasting, water quenching, ball grinding and leaching are conducted on the pellet or the briquette; thirdly, after solid-liquid separation is conducted, vanadium soaking liquid and soaking slag are obtained, magnetic separating continues to be conducted on the soaking slag, and fine powdered iron and titanium-rich tailings are obtained; and fifthly, size mixing, vanadium precipitation and solid-liquid separation can continue to be conducted on the vanadium soaking liquid, and therefore sodium salt and ammonium vanadate are obtained. The method is simple in technology, low in energy consumption and high in metal recovery rate; and in addition, resources are reasonably used in the separation process, sodium salt and ammonia gas which are obtained through separation are effectively utilized, and the resource utilization rate of the whole separation process is high.

A control method for improving the braking energy recovery of the car with mixed power features that when the car is braked for deceleration, the engine is separated from power drive system by clutch and the electric generation load of electric generator is increase by recovering the braking energy.

The invention opened a core-spun yarn for reach the molten steel vanadium and the nitrogen alloying. It includes the sandwich layer and the steel outer layer. The sandwich layer contains the vanadium nitride alloying. After tapping or refining the molten steel, the core-spun yarn is dipped into the molten steel to add the vanadium, nitrogen and the other alloying agent. Because the vanadium nitride alloying is dipped into the steel liquid, the percent recovery of the vanadium can be improved by 5% and it can be controlled above 92%, the N is 10-20% and above 80%.

The invention discloses a making method of platinum-on-carbon based catalyst in the fuel battery, which comprises the following steps: adding the metal salt pioneer body, complexing agent and alcohol reducer in the organic solvent; stirring at atmospheric temperature; adding alkaline material; adjusting the pH value; protecting heat reflux through nitrogen or in the autoclave; adding the carbon carrier to stir at atmospheric temperature; diffusing the metal sol particle evenly on the carbon carrier; adding acid material to adjust the pH value; adding second distilled water to break sol through ultrasonic shock; filtering the filter cake until the Cl- is not detected; drying the vacuum; cooling; grinding to produce the platinum-on-carbon based catalyst within Pt/C, Pt-Ru/C, Pt-Ru-Ir/C, Pt/CNT, Pt-Ru/CNT and Pt-Ru-Ir/CNT.

The invention relates to a municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation, and belongs to the field of sewage treatment. According to the invention, municipal sewage enters a biosorption reactor at first, organic matter in the sewage is absorbed into activated sludge through the absorption effect of the activated sludge, then the municipal sewage enters an SBR (Sequencing Batch Reactor Activated Sludge Process) reactor, and through the alternate operation of low oxygen aeration and anaerobic agitation, the autotrophic nitrogen removal of the partial nitrification and the anaerobic ammonia oxidation is realized, so that the energy recuperation efficiency of the sewage treatment is improved, and the operation energy consumption of the sewage treatment is lowered.

A process for recovering the solvent used in preparing polyphenyl thioether includes such steps as using the washing water of filter cake as extractant to extract the solvent from filter cake, mixingthe extract with the dewatered liquid and/or filtrate generated in production of polyphenyl thioether, adding treating agent to separate out assistant, and dual-tower rectifying to obtain refined NMPsolvent. Its advantages are high recovery rate increased by 10%, high content of NMP (99.6% or more), and low cost.

The invention includes a scalable, modular interlocking container with a multi-purpose use. Vertical and horizontal interconnectivity are achieved through interlocking mechanisms. An exemplary first use is for transporting and/or storing liquids or solids that can be poured. An exemplary second use is for a sturdy, low cost, easily assembled building block material of a standardized nature. Each modular unit slide-locks with other units to form strong wall and building structures that can be filled with natural earth, sand or other such materials, thereby forming a sturdy structure without the use of mortar, and can adapt to uneven base surfaces typically found in natural terrain.

The invention discloses a process for recovering a waste polyethylene glycol terephthalate (PET) material. The process is characterized by comprising the following steps of: crushing the waste PET material, dissolving the crushed PET material ion into an organic solvent to form a homogeneous solution; and adding an adsorbent into the homogeneous solution, discoloring and removing insoluble substances, and sequentially filtering and crystallizing to obtain the required crystallized PET material. According to the process for recovering the waste PET material, the recycled polyester intrinsic viscosity control technology, the crystallization technology and the impurity removal technology are realized, water is not required to be added in the whole process, the wastewater discharge is avoided, and the environmental pollution is reduced. The intrinsic viscosity of the recycled PET product reaches 0.77dL/g, the purity is 99.5 percent, and the recovered material reaches a novel level.

The invention relates to the technical field of comprehensive utilization of resources and discloses a treatment method for a waste lithium-ion battery. The method comprises the following steps: carrying out disassembling, discharging, breaking, crushing and sorting; carrying out alkaline transfer, acid dissolution and impurity removal on the sorted electrode material; and then carrying out chemical separation through pretreatment on the waste lithium-ion battery, wherein extraction and separation are a key step; partial cobalt is separated from lithium to obtain a nickel-cobalt-lithium, nickel-cobalt or nickel-cobalt-manganese mixed salt, a lithium salt and a cobalt salt; mixed sulfate regenerates a cathode material through chemical synthesis; an electrolyte and the cathode material can be obtained in the overall treatment process; the recovery rate of the cathode material is improved; and the recovery purity of copper, aluminum and the like are improved. In addition, the cathode material is directly produced; the production process is shortened; and construction of the circulating industry chain of battery production, battery recovery treatment and battery production is increased.

The invention discloses a method for recycling epoxide resin and glass fiber from non-metal powder in waste printed circuit boards, comprising the following steps of: (1) pretreatment, and dust removal by washing; (2) removing residue metal: inorganic acid is used for removing the residue metal in the non-metal powder, and the obtained powder can be used directly after being filtrated; (3) preliminary decomposition: the processed non-metal powder is added into inorganic acid, the obtained mixture is heated for reaction and then filtrated; the filtrated solid is added into organic solvent, stirred and filtrated and the obtained solid is the glass fiber; and the organic solvent in the filtrate is evaporated so as to obtain the solid epoxide resin; and (4) secondary decomposition: the obtained solid epoxide resin is added into inorganic acid, and heated for reaction; and then the organic solvent is used for extraction and then is evaporated so as to obtain low molecular weight epoxide resin. The invention realizes green recycling of the non-metal powder of the waste printed circuit boards under the moderate condition and has high recovery rate, thus not only being capable of reducing the emission of pollutants but also leading the resource to be fully utilized.

The invention relates to a method for recycling high-purity fluorine and phosphorus from a wastewater of phosphogypsum residue field. According to the different reaction conditions of calcium fluoride and magnesium ammonium phosphate, the implementation of the method is divided into two stages: in the first stage of recycling high-purity calcium fluoride: adjusting the pH (Potential Of Hydrogen) value of the wastewater of the phosphogypsum residue field by a sodium hydroxide solution to 3-6 to enable the fluoride ions and calcium ions in the wastewater to be reacted to generate calcium fluoride precipitate, filtering and recycling calcium fluoride; and the second stage of recycling high-purity magnesium ammonium phosphate: adjusting the pH value of the wastewater after the first section of recycling high-purity calcium fluoride by the sodium hydroxide solution to 7.5-9.5, adding a magnesium source and an ammonia source at the same time, generating magnesium ammonium phosphate, magnesium ammonium phosphate analogs or phosphate compounds in a crystalline state in a magnesium ammonium phosphate crystallization reactor, filtering and recycling magnesium ammonium phosphate. The water treated by the method disclosed by the invention has low impurity content and can be directly used as the industrial water and circulating cooling water in a phosphorus chemical production system.

The invention relates to a method for directly producing electrolytic nickel with copper-nickel renewable resources, which includes the following steps: (1) pulping the copper-nickel renewable resources through ball milling, pumping them into a closed leaching tank, and adjusting the acidity of the pulp with sulfuric acid to make The pH reaches 0.5-3.5, and react at normal pressure and temperature at 60-70°C for 30 minutes to obtain a liquid containing NiSO4 and CuSO4; (2) obtain a liquid containing NiSO4 and CuSO4 from the slurry discharged from the leaching tank, Adjust the PH value to 2.0 with alkali in the atmospheric kettle and filter it with a plate and frame filter press; (3) Purify and remove impurities from the liquid after extracting copper; (4) After the reaction in the third step is completed, the Slag liquid separation by filter press filtration; (5) electrolytic copper; (6) electrolytic nickel. By adopting the invention, the comprehensive recovery rate is high; the treatment process does not pollute the environment, and the waste residue can be directly used for making bricks; the waste water can be recycled; the production cost is low and the economic benefit is good.

A low-pressure olefins recovery process and plant are described. The feed gas 300 is compressed 302, 304 and distilled 310 at a primary distillation pressure. The overhead stream 312 is chilled 318 at a pressure less than 30 kg/cm 2 (430 psia) to partially condense the overheads. The primary distillation tower 310 is refluxed with at least a portion of the condensate 320. The overhead vapor is further chilled 318 and partially condensed and the condensate 322 is fed to a demethanizer 324. The remaining vapor 326 is cooled in a cold section 328 and the resultant liquid is phase-separated 330 and expanded 331, 334 to provide refrigeration for the cold ssection. The expanded vapor 332 from the cold section is recycled to the process gas compressor. The bottoms streams 338, 342 from the primary distillation zone and the demethanizer are fractionated into respective streams consisting essentially of ethylene 356, ethane 358, propylene 364, propane 366, C 4 's 346, and C 5+ 348.

The invention relates to a method for producing ferrovanadium nitride by adopting a self-propagating high temperature synthesis process, which comprises the following steps of: firstly, crushing ferrovanadium in grinding equipment; drying and then charging the crushed ferrovanadium into a crucible in bulk; placing the crucible into a high-pressure synthesizer and filling 6-12MPa of nitrogen; starting an igniting device and igniting the raw materials to carry out synthetic reaction; automatically sustaining combustion synthesis reaction; and cooling and taking out the combusted and synthesized ferrovanadium nitride in the nitrogen and crushing into blocks, wherein the ferrovanadium and the nitrogen are used as raw materials. The method for synthesizing and producing the ferrovanadium nitride does not need additional energy sources, has no pollution, high synthesis speed, energy saving, environmental protection and high efficiency and is a hi-tech production process which is worthy of popularization.

The multi-metal cassiterite sulfurizing tail concentrating method includes: graded tail throwing with combineed screw concentrating machine and screw chute; floating of the rest tail with phenyl halogenated quaternary ammonium salt and black butyl amine as collecting agent to recover sulfurized mineral of Pb, Sb, Zn, etc and sulfurized mineral oxide of Pb, Sb, Zn, etc while leaving the cassiterite and gangue inside the trough; and recovering cassiterite with sodium carbonate and carboxymethyl polyvinyl alcohol as combined gangue dispersing and inhibiting agent and through stepped floating process. Compared with traditional method, the method has concentrating grade raised by 1-3 times, comprehensive tail loss of about 10 % and 10 % raised recovering rate of Pb, Sb, Zn, Sn, etc.

The invention discloses a method for processing battery-level lithium carbonate mother liquor. The processing method comprises the following process follow: A. acidizing lithium deposition mother liquid; B. evaporating, condensing and separating out sodium; C. depositing lithium; and D circulating: circularly carrying out steps from A to C on liquid obtained by dewatering in step B and leaching in the step C and the mother liquor subjected to lithium deposition. By the adoption of the method for processing battery-level lithium carbonate mother liquor, which is disclosed by the invention, the quality of lithium chloride can be guaranteed, and lithium recovery rate can be improved greatly on the basis of the formed sealed circulation. In addition, no the industrial three wastes are discharged, therefore the purpose of clean production is achieved.

The invention discloses a comprehensive recovery method for cathode materials of a ternary lithium ion battery. The comprehensive recovery method comprises the following steps that the cathode materials of the ternary lithium ion battery are added into water for pulping treatment to obtain a pulping liquid, then concentrated sulfuric acid and hydrogen peroxide are added to be stirred, and filtering is conducted to obtain an acid leaching solution A; the acid leaching A is regulated to be acidic, excessive Fe powder is added to remove Cu impurity, then iron and aluminum impurities in the solution are removed by using a halotrichite method, and filtering is conducted to obtain a filtrate B; the filtrate B is regulated to be alkaline to precipitate a nickel element, a cobalt element and a manganese element, and filtering is conducted to obtain a solution C and filter residue D; the solution C is concentrated, and then a saturated sodium carbonate solution is added to obtain lithium carbonate precipitation; and the filter residue D is dissolved to obtain a solution E, and the solution E is extracted and separated to obtain a nickel-containing solution, a cobalt-containing solution anda manganese-containing solution. According to the comprehensive recovery method for the cathode materials of the ternary lithium ion battery, after the cathode materials of the ternary lithium ion battery are leached and impurities are removed, the nickel, cobalt and manganese elements are precipitated, the lithium element is separated firstly, prior recovery of lithium is achieved, and the recovery rate of the lithium element is improved.

The invention provides a beneficiation reagent and method for separating copper-molybdenum mixed concentrates. According to the invention, the effective separation of copper-molybdenum mixed concentrates can be realized by using a concentrated reagent removal and an oxalic acid reduction method, and the oxalic acid reduction method has an effective restraining effect on primary and secondary copper-sulphide ores such as chalcopyrite and chalcocite and the like, the process is simple and reasonable, and the recovery rate of molybdenum is high. The method disclosed by the invention concurrentlyhas the characteristics of good stability, strong adaptability and less reagent consumption, and can greatly reduce the production cost.

The invention provides a kit for extracting free DNA and belongs to the technical field of high-throughput DNA detecting. The kit uses two-step magnetic bead absorption to extract the free DNA in blood plasma or urine, low-concentration isopropanol is used in the first step, and magnetic beads mainly absorb large DNA fragments above 500bp; the concentration of the isopropanol is increased in the second step, the magnetic beads mainly absorb small DNA fragments below 500bp, and the DNA fragments above and below 500bp can be extracted by the two-step method. The invention further provides standard products suitable for the two-step method, and the standard products are DNA fragments of 127bp and 208bp. The kit is applicable to prenatal diagnosis and early-stage tumor screening and promising in application prospect in clinical medicine.

The invention discloses an industrial method for selectively recycling copper and nickel from copper-nickel mud, belonging to the field of recycling non-ferrous metal resources. The industrial method comprises the following steps of: acid-leaching the copper-nickel mud; filtering leachate; punching the leachate to a sealed tubular slot from a circulating slot under the action of a circulating pump, rotating the solution in the slot at a high speed, and carrying out rotational flow electrolysis to remove the copper; returning electrodeposited solution to the leaching process for continuously carrying out leaching; and gathering the nickel in the copper-nickel mud for preparing nickel sulfate. According to the industrial method provided by the invention, an high-speed rotation electrolytic technology for a solution in an electrolytic cell is combined with other processes to recycle the metal in the solution for being continuously used for other industries, so that the waste material is changed into things of value for realizing recycling the resources; the current density and the current efficiency are high, the reagent consumption is low, the production cost is reduced, and performances of the enterprise are improved. Meanwhile, the solution is circulated in a closed-loop manner, so that no harmful gases are exhausted, and the existing circular economy and environmental protection theories are satisfied.

The present invention relates to the technical field of organosilicon production, and discloses a method for recovering copper and silicon powder from organosilicon waste residue. The method comprises the following steps: (1) ripening, (2) water dipping, (3) solid-liquid separation, (4) extraction, (5) washing, (6) back extraction, and (7) copper electrowinning. According to the present invention, concentrated sulfuric acid is adopted to carry out oxidation so as to easily achieve complete copper recovery; during extraction, an ultrasonic treatment is adopted so as to avoid emulsification phenomenon generated during extraction, and provide a good extraction phase separation effect; and process steps are simple, treatment cost is low, operation is easy, recovery rates of cooper and silicon powder are more than 95%, the obtained electrowinning cooper has a purity of more than 99.95%, the obtained silicon powder has a purity of more than 90%, recovery rates of cooper and silicon powder are high, and purities are good.

The invention discloses a environment-friendly type craft to extract vanadium from bone coal, which comprises the following steps: processing raw material; blanket-baking; leaching with diluted acid; converting; absorbing with resin; getting ammonium metavanadate; dissolving alkali; proceeding thermal decomposition; producing high-grade vanadic oxide; adopting wet process smoke discharging method and environmental degassing unit to dispose the waste gas; adopting spoil area to dispose waste slag water; using circulating water system to dispose the waste water; removing the pollution for environment; making the direct recovery ratio of pure vanadium reach about 65% and purity of vanadic oxide reach 99%. This invention possesses high recovery ratio, low consumption of material, good quality and low cost, which is a new craft without pollution.