53results about How to "Enhanced leaching process" patented technology

The invention discloses a method and device for immobilizing CO2 in industrial tail gas by enhancing mineral carbonation. The device comprises a packed column absorber, a mineral leaching tank, a carbonation reactor and a belt type filter. The method comprises the steps of: enabling the industrial tail gas containing CO2 to enter the packed column absorber filled with immobilization carbonic anhydrase, rapidly transforming the CO2 into HCO3<-> under the catalysis action of the carbonic anhydrase; with a weak acidic solution containing the HCO3<-> as a mineral leaching agent, effectively leaching calcium ions from minerals in the mineral leaching tank under the action of ultrasonic waves to form a slurry enriching Ca<2+>; introducing the slurry enriching Ca<2+> into the carbonation reactor, adding a calcium-containing alkali material, regulating the pH of the slurry to be 7-9 to ensure that the HCO3<-> is transformed into CO3<2->, and generating a carbonation reaction with the Ca<2+> leached from the minerals to generate CaCO3. The invention can promote the CO2 to be rapidly transformed into the HCO3<->, can promote the calcium ions to be leached from the minerals and the carbonation reaction, and further realizes that the CO2 in the industrial tail gas is immobilized through direct carbonation under normal pressure.

The invention discloses a wet-process comprehensive recovery and utilization method for zinc replacement residues. The wet-process comprehensive recovery and utilization method can efficiently recover zinc, germanium, gallium, copper, iron and silicon dioxide in the zinc replacement residues, and the leaching rates of all the metals are all higher than 94%. The wet-process comprehensive recovery and utilization method is conductive to improving the metal comprehensive recovery rate, meanwhile, the energy consumption in the whole technological process is reduced, generated waste liquid is returned for leaching to achieve the purpose of cyclic utilization, the problem of environmental pollution is solved, and the wet-process comprehensive recovery and utilization method is environment-friendly.

The invention discloses a method for selectively enriching scandium from Bayer process red mud. The method is characterized in that the Bayer process red mud is used as a raw material, the red mud isfully wet by adding an appropriate amount of water, the red mud is sulphated by using concentrated sulfuric acid and is then calcined at a high temperature, the solid calcined product is mechanicallyactivated by grinding and is then subjected to four-stage water immersion and washing, so that a scandium-rich leaching solution, scandium-rich washing liquid and low-alkali iron-rich slag are obtained. The method enables most of scandium to be leached, but the leaching rates of impurity iron and aluminum are low, and silicon and titanium are not leached substantially, so that the formation of colloidal silicate in the leaching solution is avoided, and the selective absorption and extraction of the scandium in the subsequent leaching solution are facilitated; the generated sulfur dioxide and sulfur trioxide can be reused in the preparation of sulfuric acid, so that the production of a large amount of waste acid is avoided; the pH of the low-alkali iron-rich slag is close to neutral, and can be used in the industries such as iron making, adsorbents, ceramics, construction and the like, so that a new way is provided for the extraction of the scandium and the comprehensive utilization ofthe red mud.

The invention relates to an iron balancing technology in a low-grade sulfide ore biological heap leaching-leachate purification-extraction and separation process. The technology comprises the following steps: firstly dissolving alunite and other potassium-containing minerals in a mineral heap to form one part of iron vitriol type precipitate in the mineral heap; secondly adding lime into a biological leachate to regulate the pH value of the leachate, adding a mixed leaching bacterial solution of ferrous oxide and the like and an iron vitriol seed crystal, and accelerating the formation of the iron vitriol type precipitate by a biological vitriol formation method to realize fast and efficient purification and iron removal; and adding the mixed leaching bacterial solution of iron-oxidizing bacteria and the like before raffinate returns to the mineral heap, regenerating iron in the raffinate, and then returning the raffinate to the mineral heap as spraying liquid. The iron balancing technology provided by the invention is suitable for controlling impurities in the biological leaching process of low-grade sulfide ores, the problems of serious entrainment of valuable elements, high neutralization cost and the like caused by traditional iron removal by neutralizing with the lime are solved, and the leaching and extraction separation efficiency is improved at the same time.

A method of recovering a precious metal from a sulphide mineral slurry which contains the precious metal which includes the steps of subjecting the slurry to a bioleaching process, supplying a feed gas which contains in excess of 21% oxygen by volume to the slurry, and recovering precious metal from a bioleach residue of the bioleaching process.

The invention relates to the field of wet metallurgy, in particular to a composite leaching agent for enhanced leaching of weathered crust elution-deposited rare earth ores and a preparation method thereof and a method for extracting rare earth. The composite leaching agent for enhanced leaching of the weathered crust elution-deposited rare earth ores comprises 1-4 % of an inorganic leaching agentand 0.1-1.2% of one or a combination of more of dimethyl diallyl ammonium chloride, 2-chloroethyl trimetyl ammonium chloride, an acrylamide and dimethyl diallyl ammonium chloride copolymer and acrylamidetrimethyl allyl ammonium chloride according to the mass percentage. The method for extracting the rare earth comprises the step of using the composite leaching agent for enhanced leaching of the weathered crust elution-deposited rare earth ores to leach the rare earth in the rare earth ores. Under the coordination between the inorganic leaching agent and an organic stabilizer, the weathered crust elution-deposited rare earth ores are leached in situ, the permeation of the leaching agent and the leaching process of the rare earth are enhanced, the consumption of the leaching agent is reduced, the expansion of the clay minerals is inhibited, problems that stability of the weathered crust elution-deposited rare earth ores is low and the weathered crust elution-deposited rare earth ores are easy to generate landslide due to the inorganic leaching agent are solved, and the exploration period is also shortened.

A process for recovery of one or more elements, selected from precious metals and chalcophile metals, as herein defined, from materials containing precious and/or chalcophile metal/s, said process including: (i) contacting the material with an alkaline solution containing a lixiviant comprising an amino acid, or derivative thereof, and an alkali stable transition metal complex in order to form a leachate containing the precious metal and/or chalcophile metal; and (ii) recovering the precious metal and/or chalcophile metal from the leachate.

A process for the recovery of nickel and cobalt from laterite ores, the process including the steps of: a) beneficiating the ore to separate it into a beneficiated upgraded ore fraction and a coarse, siliceous low grade rejects fraction which is substantially free from fines and clay materials; b) separately processing the upgraded ore fraction for the recovery of nickel and cobalt; and c) subjecting the low grade rejects fraction to a heap leach process with an acid supplemented solution to create a heap leachate for further nickel and cobalt recovery processing.

An additive formulation for reduction or prevention of microbially induced corrosion in concrete, cementitious material (such as mortar or grout), or a combination thereof. The additive formulation comprises a Quat Silane and a fungicide, wherein the ratio of the Quat Silane to the fungicide in the formulation is in a range of about 10:1 to about 1:10, preferably in a range of about 5:1 to about 1:5.

The present invention relates to the field of food production, in particular the provision of flour mixtures for the production of bakery products, pasta and bread, which are characterized by a reduced ATI content and can nevertheless be processed into doughs which meet the technical and rheological requirements of a wheat dough.

The invention mainly relates to the technical field of food processing, and discloses a cherry instant drink. The drink is prepared from the following raw materials: cherry, broccoli, tremella, cherry leaves, xylooligosaccharide, complex enzyme, vitamin C, griffonia seed extract and lactobacillus, has the advantages of rich raw materials, comprehensive nutrition, sour and sweet taste and convenience in drinking, the deep processing approach of cherry and cherry leaves is improved, cherry deep-processed products on the market are increased, cherry leaves are sufficiently utilized to change waste into valuable materials, and the economic income of farmer households is increased by 14.2%; color and nutrition of the cherry drink can be enriched by adding broccoli and tremella, and the drink tastes smooth; and cherry mixed slurry is subjected to enzymolysis by the complex enzyme, the tissue structure of raw materials is decomposed, extraction of beneficial ingredients in the raw materials and juice output increase can be promoted, the nutrition and flavoring ingredients of the drink can be improved; and after the cherry leaves are ground and deep-fried, the fragrance is improved, and the tanning taste of cherry leaves can be lightened.

The invention discloses a medicine for treating rhinitis, belonging to the technical fields of Chinese herbal medicinal preparations and applications of the Chinese herbal medicinal preparations. The medicine adopts the following medicinal materials for external application: flos magnoliae liliflorae, cocklebur fruits, radix angelicae, herba asari, ramulus cinnamomi, garlic bulbs, herba centipedae and borneol; the medicine adopts the following medicinal materials for oral administration: honeysuckle flowers, flos chrysanthemi indici, caulis luffae, herba rhodiolae sacrae, radix acanthopanacis semticosi, radix angelicae sinensis, fructus xanthii, radix angelicae, flos magnoliae officinalis, dandelion, flos carthami, and herba violae. The medicine adopting the prescription is refined and powerful, is simple, and is strong in practicability; after the medicine adopting the prescription is used for treating rhinitis, the relapse of rhinitis seldom occurs, and no side effects exist; the basic purpose of the medicine is to promote the blood circulation and replenish the blood, and improve the body immunity, the external warming the middle warmer and the internal dispelling wind and calming the liver are achieved together, so that the purpose of treating rhinitis is achieved.

The invention discloses a dynamic leaching system. The dynamic leaching system comprises a container for containing a solvent, a metering pump, a conveying pipeline, at least two columnar containers,spray heads for spraying a leaching solvent into respective columnar containers, a collection container and rain gauges. One end of the conveying pipeline communicates with the container; the meteringpump is arranged on the conveying pipeline close to one end of the container; at least two branch pipelines are arranged at the other end of the conveying pipeline; each branch pipeline communicateswith one corresponding spray head; one columnar container is arranged below each spray head; one rain gauge is arranged in a cavity of one corresponding columnar container, and other columnar containers are used for containing to-be-leached samples and are provided with water outlets in the bottom walls; a filter is arranged above the bottom walls; and the obtained lixivium flows into the collection container through the water outlets. The invention further discloses a dynamic leaching method. The dynamic leaching system is simple in structure and can simulate toxicity dynamic leaching on solid waste, such as fly ash, in an on-site environment; and the method is simple to operate, wide in application and high in simulation effect.

The invention discloses a preparation method for extracting water-soluble polyose from black pine needles according to a decompression inner-boiling method. The preparation method comprises the following steps: putting the black pine needles in a constant-temperature drying cabinet for 24 hours' drying at 40 DEG C, milling the dried black pine needles by a miller, and sieving with a 80-mesh sieve; weighing 1 g of the obtained black pine needle powder, putting the weighed black pine needle powder in a glass device, and adding 2 ml of ethanol for 30 minutes' uniform wetting, so as to ensure that ethanol permeates the black pine needle powder; carrying out vacuum suction to reduce the gauge pressure to -0.080 MPa, carrying out decompression suction till slightly boiled bubbles are generated on the mixture surface, and carrying out filtration; extracting a solution by utilizing hot water of which the volume is 20 times of that of the solution and the temperature is 85 DEG C for 6 minutes; selecting a small amount of the extracted solution for dilution, and measuring the polyose content according to a phenol-sulfuric acid method; precipitating the extracted solution by utilizing a 4% ethanol solution, carrying out still standing for a night, carrying out centrifugation, and then taking out the precipitate for drying in the drying box; preparing the dried solution into a polyose product. Through adoption of the technical scheme, the leaching amount of polyose is improved; the decompression inner-boiling method is low in production cost and simple in process; the preparation method has the advantages that the effective components of polyose can be quickly extracted and separated in an environment-friendly manner.

The invention relates to a microbial fertilizer applicable to improvement of flaky salinized areas in Ningxia and Inner Mongolia in China. The microbial fertilizer comprises 1 to 1.5 of rice husk, 10to 15 of humic acid, 10 to 16 of balloonflower roots, 30 to 40 of earthworm soil, 2 to 3 of cytokinin, 1 to 3 of gibberellins, 15 to 20 of peroxyacetic acid, 8 of Sulfolobus acidocaldarius, 6 of Bacillus megaterium, 4 of nitrogen fixation bacteria and 2 of ferment bacteria. Directed at the characteristic of soil in flaky salinized areas in Ningxia and Inner Mongolia in China, the rice husk and theballoonflower roots are cooperated with humic acid to improve soil nutrients; the earthworm soil absorbs oozed low-position steam and fully immobilizes the steam on the surface of a soil layer; gibberellin and peroxyacetic acid rapidly fracture one-piece alkalized soil and isolated fractured alkalized soil; and then a great amount of communicating fermentation broth of Sulfolobus acidocaldarius and Bacillus megaterium obtained after glycolysis infiltrates into alkaline soil with biological components, and rapid differentiation and proliferation are realized among blocks, so the leaching and desalination capabilities of soil are improved, and the content of accumulated salt in each alkaline earth block is continuously reduced.