335results about How to "Fast leaching" patented technology

The invention relates to a method for recycling copper, nickel, chromium, zinc and iron from plating sludge, belonging to the technical field of chemical engineering and metallurgy. The method comprises the following steps: acid leaching, vulcanizing for separation and enrichment, hot-pressure leaching, extracting for separation, hot-press oxidizing chromium, purifying chromium solution, extracting ferric chloride and the like. The method has obvious advantages of strong adaptability to different kinds of plating sludge, high utilization of metal resources, high value-added content of product,less process waste residue, thorough deintoxication and the like.

The invention discloses a method for quickly leaching gold and silver by using a mixed leaching agent, which comprises the following steps of: crushing gold-containing pyrite smelting slag, a sulfide-containing visible gold ore or/and a gold-containing oxidized ore serving as raw materials, conditioning the raw materials with water to form slurry, adding ammonium thiocyanate, thiocarbamide, urea and an oxidant, namely manganese dioxide or ferric chloride, into the ore slurry and stirring and leaching the mixed slurry to leach the gold and silver out. The method has the advantage that: the mixed leaching agent formed by adding the urea into the ammonium thiocyanate can quickly leach the gold and the silver out of the sulphur and arsen-containing gold ore by adding the urea with a low cost, particularly the gold and the silver which are contained in pyrolusite can be leached out with a lower cost. At the same time, beneficial elements in the ores can be comprehensively used.

The invention relates to a method for extracting niobium from tailings, belonging to the technical field of mineral extraction metallurgy. The method includes the steps as follows: (1) treating the tailings with a flotation method so as to float out iron and niobium minerals from the tailings; (2) using a microwave magnetizing-roasting method and adding carbonaceous reducing agent in the floated minerals so as to convert the haematite in the minerals into magnetite; (3) separating the magnetite out from the roasted minerals by adopting a low-intensity magnetic separation method, thus enriching the niobium minerals in the tailings subjected to magnetic separation; and (4) leaching the obtained niobium minerals out in a high-pressure kettle with concentrated acid so as to obtain niobium-containing extract. The method flow is short, flotation agent types are few and the flotation effect is good; the mineral roasting time is short, the consumption quantity of reducing agent is less and the cost is low; the content of hazardous elements such as S, P and the like in the magnetite obtained by low-intensity magnetic separation is low simultaneously when niobium is enriched, niobium is an excellent material for making iron with a blast furnace, and environment pollution caused by the tailings is solved to a large extent.

Composition and process of surface modification of soil particles by coating to improve fertility, better moisture and nutrients retention, flooding resistance, and longer freeze-thaw-freeze cycle life.

The invention relates to the technical field of recovery of wasted lithium ion batteries, and particularly provides a method of recycling metals from wasted lithium ion batteries. The method includes the following steps: 1) recycling a cathode waste material of the lithium ion batteries, and processing the cathode waste material into electrode sheets; 2) with the electrode sheets as a cathode and an inert electrode as a counter electrode, performing an electrochemical reaction in an acidic electrolyte to leach-out metals, thus forming a solution containing metal ions; 3) regulating the pH of the solution to 9-10, fully stirring the solution, performing centrifugation to obtain a supernatant, adding 1,2,4,5-benzenetetracarboxylic acid to the supernatant, and performing a hydrothermal reaction at 100-160 DEG C for 5-12 h to form a metal organic composite material, wherein the metal is Ni and/or Co. Through the electrochemical method, metals in the cathode is leached out, wherein completeness of leaching is guaranteed; meanwhile, the leached metals are coordinated with organic substances to form a new lithium ion battery cathode or a positive pole of a super-capacitor. The method develops a new application direction of valuable metals in wasted cathodes.

The invention discloses a beneficiation reagent, a synthesis method and a method for comprehensively utilizing generated waste gases. The beneficiation reagent is formed by solid-phase synthesis of inorganic or organic raw materials and comprises the following raw materials in parts by weight: 300 to 700 parts of a nitrogen-containing compound, 500 to 800 parts of chlorine salt, 400 to 650 parts of carbonate, 80 to 160 parts of strong alkali, 50 to 500 parts of cyanide complex double salt, 0 to 300 parts of cyanate, 5 to 20 parts of potassium sulfide, 50 to 200 parts of carbon and 0 to 100 parts of lime nitrogen. The beneficiation reagent is prepared by the following steps: mixing the raw materials uniformly; adding the mixed raw materials into a reaction kettle; quickly heating to 500 to 1,200 DEG C; maintaining high temperature for 1 to 2 hours; and cooling and crushing to obtain the product. Ammonia gas and carbon dioxide generated in a synthesis process are absorbed by a sodium sulfate solution to generate byproducts sodium carbonate and ammonium sulfate. The invention has the advantages of low production cost, simple operation, low toxicity and easy control. The product can be widely applied to leaching of noble metals such as gold oxide ores and silver oxide ores, floatation inhibitors and metal heat treatment and electroplating industries.

The invention discloses an extraction process for lychee seed saponin. The process comprises the following steps: 1) lychee seeds are pulverized, a certain amount of lychee seed powder is weighted and is soaked with water, and combinative enzyme reagent, which accounts for 1 to 2 percent of the weight of the lychee seed powder, is added in for enzymolysis treatment; 2) ethanol solution is added in for ultrasonic extraction, so as to obtain ultrasonic extracting solution; 3) filtering treatment and vacuum concentration treatment are conducted to the ultrasonic extracting solution, so as to obtain lychee seed saponin coarse extractive; and 4) macroporous adsorption resin is adopted to sublimate the lychee seed saponin coarse extractive, so as to obtain the lychee seed saponin. In the process, cell walls are softened and degraded through enzymes; with the combination of ultrasonic cavitation, the cell walls are fully destroyed, and the dissolution of active ingredients is accelerated and increased; and through the nonpolar macroporous adsorption resin, saponin ingredients of the lychee seeds are concentrated and separated, so as to prepare the high-content lychee seed saponin. The process has the advantages of time and labor conservation, lower cost and the like.

The invention relates to a method for preparing raw materials containing rare ginsenoside Rg3, Rh2 and the like for medicines, foods and healthcare products through process steps of wetting, steam explosion and the like of an acid reagent by taking ginseng, American ginseng, ginseng stem leaves and ginseng stem leaves as raw materials. The method disclosed by the invention has advanced process and is simple and feasible, the products prepared by the method disclosed by the invention contain the rare ginsenoside Rg3, Rh2 and the like, and the leaching rate of effective elements is high, the leaching is rapid, and effective elements are easy to be absorbed by human bodies. The products can be applied to the medicines, the foods and the healthcare products directly or after being simply processed.

The invention discloses a method for extracting gold and/or silver from sulfuric acid slag. The method comprises the following steps: performing multi-stage countercurrent leaching on sulfuric acid slag containing gold and silver by using an acidic thiourea solution; adsorbing a leachate by using an ester-based thiourea resin column; and after elution of a dilute acid, performing replacement and reduction by using iron to obtain noble mud containing gold and silver. The adsorption solution and the replacement solution can respectively return to a former process to be used as a leaching agent and an eluting agent; and in the operating process, wastewater and waste residues are not discharged, so that the method has remarkable environmental and economic benefits.

The present invention discloses inflated metallurgical floatation process and apparatus, and features the completely covered microbubble inflating in the self balanced water separated microbubble generating and inflating mode. The apparatus includes a main machine, a bubble overflowing system, a microbubble generating separator, a microbubble generating system, an automatic mineral slurry regulating mechanism to control the liquid level, etc. Inside the floatation column, leaching tank and oxidation tank, great amount of microbubbles are generated in the bottom and flown in the opposite direction to the falling mineral slurry so as to raise the stirring effect, form stable floating bubble layer, speed oxygen dissolution, increase oxygen utilizing rate, enhance oxidizing leaching and raise floatation recovering rate.

The invention discloses a method for recovering copper from a waste circuit board and belongs to the technical field of hydrometallurgy. The method comprises the following steps: firstly crushing the waste circuit board into powder, fully mixing the powder, an ammonia water solution, an ammonium chloride solution and water to obtain ore pulp, introducing air into the ore pulp, and carrying out ultrasonic wave intensified leaching under a stirring condition; and periodically adding hydrogen peroxide in the intensified leaching process so as to leach copper from the waste circuit board, wherein the leaching rate of copper from the waste circuit board leached in 1 hour reaches over 98%. The method disclosed by the invention realizes resource utilization of effective components of the waste circuit board and moreover, the method has the advantages of being environment-friendly, mild in reaction and short in technological process, the production cost can be lowered and the metal copper recovery rate is high, and the method is suitable for recovering valuable metals in the waste circuit board.

The invention discloses a method for leaching and recovering metal from lithium ion battery anode wastes based on an electrochemical method. The method comprises the steps of compacting lithium ionanode waste powder into a flake shape as a negative electrode, adopting an inert electrode as a counter electrode, adopting a solution containing H<+>, K<+> and/or Na<+> as an electrolyte solution, and carrying out electrochemical reduction leaching under direct voltage to obtain an electrolyte solution containing metal ions. Compared with traditional acid leaching (acid plus a reducing agent), according to the method, the acid dosage is greatly reduced, the leaching time is short, the operation can be carried out at normal temperature, the leaching efficiency of metal in a manganese-nickel-cobalt ternary cathode material is greatly improved, the method is simple to operate, and wide in industrial prospect, and the cost is low.

The invention relates to a biological mixing cobalt leaching novel technique for cobaltiferous sulfide ore concentrates. Cobalt sulphate which can be sold in the market are produced after procedures of fine grinding, washing and reagent removal, conditioning, biological mixing and leaching, solid-liquid separation, iron removal, cobalt precipitation and so on of the cobaltiferous sulfide ore concentrates. During the leaching process, the temperature of 40 to 55 DEG C, the PH value of 1.2 to 1.8 and certain ferrum concentration (1 to 15 grams per liter) in a system are needed to maintain in order to keep high activity of bacteria. The invention has the advantages of capability of fully utilizing mineral resources, improvement of comprehensive utilization level of mines, conservation of cost and improvement of profit, and is particularly suitable for development of cobaltiferous sulfide ore resources in remote areas.

The invention relates to a honeysuckle green tea and a production method thereof. The method comprises picking honeysuckle buds of the three-green period, radiating the buds through a film with infrared rays of the rate of power of 5kW for 20-30 seconds and then water-removing the buds through microwaves for 2 minutes at a temperature of 80-90 DEG C, and during the microwave water-removing process, adjusting the moisture removal according to the color and the water content of the water-removed buds; timely blowing and cooling the water-removed buds for 20-30 minutes; rolling the buds for 8-10 minutes in a gentle and short-time mode; drying the buds through microwaves for 2-3 minutes at a temperature of 80-85 DEG C; flavoring the buds for 30-60 minutes to obtain the honeysuckle green tea. The honeysuckle green tea comprehensively improves the appearance and the color as well as internal qualities such as fragrance and taste of honeysuckle substituting tea and accordingly is a novel honeysuckle green tea product integrating high quality, health care and ornamental value.

The invention belongs to the field of hydrometallurgy of non-ferrous metals, and particularly relates to a method for pre-treating high-impurity copper anode slime rich in noble metals. The method comprises the following special steps: adding sulfuric acid in the dried copper anode slime to mix size, placing in a microwave reactor, carrying out the microwave acid leaching for 5-30 min, performing the solid-liquid separation to obtain microwave acid leaching slag and a microwave acid leaching solution, adding dilute sulphuric acid in the microwave acid leaching slag to mix size, placing the microwave acid leaching sizing agent in a high-pressure reaction kettle under the pressure of 0.8-1.2 MPa after oxygen introducing, carrying out pressure acid leaching for 4-6 h to obtain pressure acid leaching slag and a pressure acid leaching solution, recovering gold and silver from the pressure acid leaching slag, and recovering nickel from the pressure acid leaching solution. The method adopting the technical scheme improves the recovery rate of copper, selenium, tellurium and nickel in the impurity copper anode slime, shortens the processing time of the copper anode slime, increases the processing capacity of the copper anode slime, enables the trend of the noble metals to be reasonable and concentrated, and is favorable for comprehensive recovery.

The invention provides a process for electrolyzing and refining lead, zinc and copper through a wet method. The process includes the specific steps that an alkalescent complexing solution with high complexing capacity is selected as a leaching solution and all valuable metals are leached out; impurities of the leaching solution are removed through a metal replacement mode; deposited lead or deposited zinc or deposited copper and oxygen are obtained through an electrolytic method; then the solution is subjected to desulfuration and desilicication through calcium oxide or calcium hydroxide; and finally, the lead or the zinc or the copper is obtained after being refined. The alkalescent complexing solution is adopted for leaching and electrolyzing, so that the problems that the leaching rate is low and metal silicates and ferrates are hard to dissolve in terms of current metal smelting with the wet method are solved. Compounds of calcium or barium are adopted for desulfuration of metal sulfates, so that the problem of high desulfuration cost caused by current desulfuration through sodium carbonate or sodium hydroxide is solved. The potential of hydrogen (pH) value of the alkalescent complexing solution is controlled to be 7.5-13.5, the electrolytic voltage is substantially lowered, and the energy consumption is effectively reduced.

The invention relates the method of extracting purification pellet phenolic acid B from Sage plant, especially extracting purification pellet phenolic acid B from salvia miltiorrhizae. The method comprises the following steps: treating the salvia miltiorrhizae in microwave field for 1-10 minutes, adding water, or disintegrating salvia miltiorrhizae to 10-60 mesh, and adding water, treating it in microwave field for 1- 20 minutes, centrifuging, removing deposition, then carrying out chromatography with polyamide, removing impurity with water and 20-50% alcohol, washing pellet phenolic acid B with 60-80% alcohol, decompressing, thickening, freezing, drying and getting pellet phenolic acid B whose purify is above 95%. The invention has the advantages of simple technology, low cost, high purify and stable quality.

The invention discloses a preparation method of a structured flexible conductive porous material. The preparation method comprises the following steps: designing a structured mold according to the real requirement; successively adding filling particles and polydimethylsiloxane prepolymer into the mold, and preparing a flexible porous material with a structured appearance; and rapidly and sufficiently filling the structured flexible porous material with a conductive material to obtain the structured flexible conductive porous material. The invention also discloses a structured flexible conductive porous material prepared by using the method. The preparation method integrates the technologies such as structured molding, grading and screening of the filling particles, surface trace fusion curing and negative-pressure permeation promotion of the filling particles and the like, so that the prepared flexible conductive porous material has the structured appearance, a porosity of the flexible porous material is controllable, the pore interconnection rate is relatively high, the filling particle is sufficient to leach, and the overall preparation speed is increased by two to three times compared with the traditional method.

The invention relates to a flower-fruit tea and a preparation method thereof. The flower-fruit tea is characterized by comprising a 1.8g of flower bag and a bag of 3.2g of filter-bag medicine package, wherein, the flower bag is prepared by blending dry chrysanthemum, honeysuckle, roselle, lophatherum gracile and globeflower; and the filter-bag medicine package takes dried roselle, fructus gardeniae, liquorice, mint, oroxylum indicum, boat-fruited sterculia seed, myrobalan and balloonflower as raw materials, which are smashed and pelletized to obtain the filter-bag medicine package. In the invention, no flavour and fragrance need to be added, thus reserving the original flavor and the natural properties of flowers and fruits; the flower-fruit tea can recuperate body and mind, relieve dried eyes, subtract yellow sweat, dispel wind and heat from the body, clear pharynx and benefit throat, purge fire and cool blood, lead the body to be joyful and healthy, and can be backwashed repeatedly.

The invention discloses an ion-type rare-earth ore ammonium-free environment-friendly exploitation technique. The ion-type rare-earth ore ammonium-free environment-friendly exploitation technique comprises the following steps that an ammonium-free ore leaching agent with a certain concentration is injected through liquid injecting holes distributed in a stope to be subjected to an ion exchanging reaction with rare-earth ores so as to obtain mother liquid enriched in rare-earth positive ions; the mother liquid seeps and gathers into liquid collecting engineering such as matching of ore-layer natural water partition bottom plates or artificial liquid collecting roadways with liquid collecting flow guiding holes; and then the mother liquid is conveyed to a hydrometallurgy workshop through a main conveying pipeline, ammonium-free agents are used for impurity removal and precipitation to obtain rare-earth carbonate, and supernatant liquid is circulated back to a liquid preparation pool andthen subjected to pH valve adjustment and agent adding, and returns to the stope to serve as a new ammonium-free ore leaching agent. The ion-type rare-earth ore ammonium-free environment-friendly exploitation technique has the advantages that ammonium is avoided in the overall process, and environmental friendliness is achieved on soil and water bodies; production waste water is circularly and comprehensively utilized, and harmful waste discharging is avoided; and the leaching rate, liquid collecting rate and precipitating rate of the rare-earth ions are high, and the resource mining comprehensive recovery rate is increased.

The invention discloses a method for directly producing biodiesel from plant oilseeds by microwave irradiation. The method includes using plant oilseeds as raw material, using alkane solvent and low carbon alcohol solvent as double-liquid-phase mixed solvent, using acid or alkali as catalyst, and performing oil extraction and transesterification in a 2450MHz or 915MHz microwave reactor. Strict water limitation on the oilseeds is not required in the method, oil production process and biodiesel production process are simplified into a simple process, and accordingly production efficiency is improved, production cost of the biodiesel is lower than that of raw oil, cost control in biodiesel production can be broken through, and investment is reduced greatly.

The invention discloses a technology for producing extract solution from baical skullcap root, and the key point of the technical scheme is that the technology for producing the extract solution from the baical skullcap root comprises the steps of smashing, stirring, mixing, heating, boiling, pressure-filtering, stirring, mixing, heating, soaking, smashing, beating, pressure-filtering and canning, thereby obtaining a finished product of the extract solution from the baical skullcap root. The technology for producing the extract solution from the baical skullcap root for extracting flavonoid compounds is characterized by simple method, fast leaching speed, high extraction rate of active ingredients and no need of purification and separation, the extract solution from the baical skullcap root is a natural, high-efficient and multifunctional additive for cosmetics which integrates the multiple effects of removing freckles, whitening, sun-screening, anti-allergy, anti-inflammation and anti-aging into a whole and can be directly used in sunscreen cream, mask, cream and other cosmetics, thereby not only improving the internal quality of the extract solution from the baical skullcap root, but also greatly saving the production cost. The technology for producing the extract solution from the baical skullcap root is applicable to producing the extract solution from the baical skullcap root and the extract solution from Chinese herbal medicines.