541results about How to "Large reserves" patented technology

The invention provides a method for preparing a high-performance molybdenum-based hydrogen evolution electrode by phosphatizing a molybdate precursor and belongs to the fields of water electrolysis and electric catalytic hydrogen evolution in the chlor-alkali industry. The method comprises the steps of pre-processing foamed nickel, growing the molybdate precursor in situ on the surface of a pre-processed foamed nickel base with the hydrothermal synthesis method, and finally placing the prepared precursor and a phosphorus source into a rube furnace together for phosphating of the molybdate precursor so that the high-performance molybdenum-based hydrogen evolution electrode can be prepared. The method is novel, the technology adopted is simple, production cost is low, the requirement for equipment is low, and the method is suitable for industrial production. Furthermore, the electrode is large in specific area, can be combined with the base firmly, has excellent hydrogen evolution activity and stability, and can be widely applied to the fields of water electrolysis and hydrogen evolution in the chlor-alkali industry.

The invention provides an efficient separation method for low-grade and complex iron ores. The method is characterized in that the complex iron ores of different grades and species are classified, so as to obtain lump ores and mineral powder which are balled, dried and preheated; reduction roasting, cooling, ball milling, magnetic separation, ball milling and magnetic separation or reverse flotation are performed in turn, so as to obtain iron ore concentrate or reduced iron powder; classification treatment is to crush and screen the iron ores with iron-containing grade between 50 and 56 percent and then dry and preheat obtained ores; fine-grained mineral powder is ground, washed, ground, deslimed and separated so as to obtain the iron ore concentrate and slime containing 58 to 60 percent of iron; the slime which is washed, deslimed, and separated is dewatered and dried and is added to and well mixed additives, so as to be balled then; the iron ores with the iron-containing grade between 40 and 50 percent are crushed and screened so as to obtain the lump ores which are directly dried and preheated, while the fine-grained mineral powder is obtained through dry-type grinding and then is added to and well mixed the additives so as to be balled then; and the iron ores with the iron-containing grade between 25 and 40 percent are crushed and screened so as to obtain the lump ores which are dried and preheated, while the fine-grained mineral powder is subjected to grinding, gravity separation or high-gradient magnetic separation and reverse flotation, so as to obtain coarse iron concentrate powder which is added to and well mixed with the additives and then is balled.

The invention relates to a technique method for directly producing sponge iron by carrying out deep reduction on extracted vanadium tailings, belonging to the field of iron making. The method adopts brown coal as the reducing agent, and simultaneously CaO is added as slag former and used for increasing alkalinity to synergize with Na2O and K2O in the tailings to react with SiO2 and Al2O3 to generate zeolite-like stable mineral so as to boost extraction and separation of sponge iron in products of deep reduction. The products of deep reduction are subject to two-section ore grinding-two-section low intensity magnetic separation technique to obtain sponge iron with iron grade larger than 90% and TiO2 smaller than 0.20%. The invention is simple in technique and easy to control, and has large reserves of raw materials and low price; the product can be used as raw material for steel making; other impurities meet steel making requirements, the technique flow of processing iron ore into rolled steel is shortened, the environment pollution caused by sintering, pelletizing and blast furnace iron making of iron ore concentrate obtained by other methods can be avoided, and the invention has obvious environment benefit and energy conservation and consumption reduction effects.

The invention relates to a coal seam pre-splitting method based on gas extraction, which adopts a 'CO2 gas extraction device' as a tool to blast and pre-split a pre-mined coal seam, so as to increase the crack of the coal seam, drive out gas absorbed on the coal seam and extract the gas. The method particularly comprises the following steps: drilling a hole on the working surface of a pre-mined coal seam, filling CO2 gas extraction device into the drilled hole, sealing the drilled hole, detonating the CO2 gas extraction device, releasing high-pressure CO2 gas for deep-hole impact and pre-splitting of the coal seam, taking out the CO2 gas extraction device, and connecting the drilled hole with a gas extraction system to extract gas. The pre-splitting method of the invention can greatly enhance the permeability of the coal seam, promote the gas dissociation in the coal seam, and improve the underground gas extraction efficiency of the coal mine.

The invention relates to a novel electrode material applicable to an intelligent liquid crystal dimming film and a preparation method thereof. A transparent conductive film is at least composed of a substrate and a graphene conductive layer. The transparent conductive film further comprises a functional layer. Graphene sheets are stacked, tiled and connected with one another on a substrate to form the graphene conductive layer. A flexible liquid crystal dimming film device is prepared through the whole wet coating process of the electrodes of a graphene transparent conductive film. The liquid crystal light adjusting layer of the commercialized flexible liquid crystal dimming film is also prepared through the wet coating process. The above two coating processes can be linked up through the roll-to-roll process. Therefore, the preparation of graphene transparent conductive electrodes and the subsequent preparation of the dimming film are ensured to be continuous, low in cost and large-scale in production.

The invention discloses a special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer comprises the following components by weight: 89%-91% of straw organic fertilizer, 7%-9% of saline-alkali soil modified material, and 1%-3% of medium-micro element additive. The invention further discloses a preparation method for the special improved organic fertilizer for saline-alkali soil. The preparation method comprises the following steps: mixing and piling 89%-91% of the straw organic fertilizer, 7%-9% of the saline-alkali soil modified material, and 1%-3% of the medium-micro element additive by weight to be long strips; uniformly stirring the long strips by a turner, adding hydrolytic polymaleic anhydride organic aqueous solution, and regulating the pH of the solution to be 3-4 to obtain the special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer for saline-alkali soil can effectively improve soil hardening, increase micro elements and organic nutritional ingredients of humic acid in the saline-alkali soil and improve quality of humus, thereby improving soil fertility and achieving survival rate of planted seedling of more than 95%.

The invention discloses an ecotypic-gypsum-based dry powder coating. The coating comprises the following components in percentage by weight: 35 to 70 percent of gypsum powder, 10 to 20 percent of slag powder, 5 to 10 percent of white cement, 2 to 6 percent of exciting agent, 0 to 26 percent of filler, 1 to 10 percent of pigment, 6 to 10 percent of tackifier, 1 to 2 percent of thixotropic agent, 0.1 to 0.5 percent of dispersing agent, 0.05 to 0.5 percent of water-retaining agent, and 0.1 to 0.5 percent of antifoaming agent. The raw materials are easily obtained; the production process and equipment are simple; during construction, the coating can be mixed with cold water, can be used for roller coating and brush coating, has high covering power, can also be scumbled, and can be connected firmly; and powder does not fall off, and the indoor humidity can be adjusted.

The invention relates to fully-nutrient meal replacement maltose capable of invigorating the stomach and a preparation method of the fully-nutrient meal replacement maltose, and belongs to the technical field of a functional food. The fully-nutrient meal replacement maltose comprises the following raw material components in percentage by weight of 10-45% of brown rice, 0-40% of millet, 0-40% of black rice, 3-16% of corn, 3-10% of sorghum, 3-10% of oat, 3-15% of tartary buckwheat, 3-20% of red beans, 0-15% of black beans, 0-15% of mung beans, 3-15% of lotus seeds, 0-10% of poria cocos, 3-15% ofChinese yams, 10-45% of inulin, 0-1% of complex vitamins, 0-5% of composite mineral substances, 0-15% of hericium erinaceus, 0-5 % of cordyceps militaris, 0-10% of pea protein, 0-10% of oat fibers and 0-5% of konjac powder. The meal replacement maltose is rich in various grain coarse cereals, superior dietary fibers, vegetable protein, vitamins, minerals, hericium erinaceus and the like are added, so that the fully-nutrient meal replacement maltose is pleasant in mouth feel, rich in nutrition and convenient to carry and eat.

The invention belongs to the technical field of preparation of functional high polymer materials, and particularly relates to a natural high polymer material modified adsorption resin for the adsorption of heavy metal ions and a preparation method for the adsorption resin. The heavy metal ion adsorption resin comprises the following components in percentage by weight: 10.0 to 15.0 percent of chitosan (Chit), 25.0 to 50.0 percent of acrylic acid (AA), 20 to 45 percent of acrylamide (AM), 0.1 to 0.4 percent of N,N-methylene-bisacrylamide (NMBA), 1.0 to 3.0 percent of potassium persulfate (KPS) and 0.0 to 15.0 percent of wood meal. By the heavy metal ion adsorption resin, Pb2+ can be efficiently adsorbed and separated, the cost of a chitosan modified adsorption resin can be lowered, adsorption capacity can be improved, the number of reuse times can be increased, and the adsorptive selectivity of the resin can be improved.

The invention discloses an attapulgite/polyvinylidene fluoride nano-composite ultra-filtration membrane and a preparation method thereof. The preparation method comprises the following steps: adding a certain amount of nano attapulgite into triethyl phosphate selected as a solvent; carrying out fierce mechanical agitation and ultrasonic treatment and adding polyvinylidene fluoride powder; agitating until the powder is dissolved; adding polyethylene glycol and agitating uniformly to obtain a membrane casting solution; and preparing the attapulgite/polyvinylidene fluoride nano-composite ultra-filtration membrane by taking water as a condensation bath through the adoption of an immersion precipitated phase conversion method. According to the attapulgite/polyvinylidene fluoride nano-composite ultra-filtration membrane disclosed by the invention, the nano attapulgite is guided into a polyvinylidene fluoride ultra-filtration membrane, and a unique nano fiber structure of the attapulgite and a three-dimensional net-shaped structure formed by the attapulgite and polyvinylidene fluoride are utilized, so that the structure and the strength of the polyvinylidene fluoride ultra-filtration membrane are effectively improved; and meanwhile, the permeability, the hydrophily and the anti-pollution capability of the polyvinylidene fluoride ultra-filtration membrane are improved by utilizing the high hydrophily of the attapulgite.

The present invention relates to method of producing phosphoric acid with low and medium grade phosphorous ore. The low and medium grade phosphorous ore is used to produce phosphoric acid through the acidifying reaction with water solution of phosphoric acid, solid-liquid separation and phosphoric acid crystallization reaction. The method has the advantages of high phosphoric acid purity and low production cost.

The invention discloses an easy-to-wash PVDF (polyvinylidene fluoride) ultrafiltration membrane and a preparation method thereof. The preparation method comprises the following steps: with triethyl phosphate as a solvent, ultrasonically dispersing a certain amount of poly N-isopropylacrylamide modified attapulgite in the solvent, adding PVDF powder and stirring violently till the PVDF powder is dissolved, adding a pore-foaming agent, namely polyethylene glycol, and uniformly stirring, and finally standing for defoaming to obtain a membrane casting solution; with water as a coagulating bath, preparing the ultrafiltration membrane by using an immersion precipitation phase conversion method. By introducing the poly N-isopropylacrylamide modified attapulgite into the PVDF ultrafiltration membrane, the unique nano-fiber structure of the attapulgite and the three-dimensional net structure formed by PVDF can be used to effectively improve the structure and strength of a pure PVDF ultrafiltration membrane, and the high hydrophilicity of the attapulgite is used to improve the permeability and hydrophilicity of the membrane; meanwhile, the ultrafiltration membrane also has the temperature sensitivity of poly N-isopropylacrylamide, and anti-pollution and easy-to-wash properties are realized.

The invention provides a product and a product composition for improving sub-health status. The product and the product composition comprise maca and oyster peptides. The composition provided by the invention is unique and reasonable in formula and can be granules, powder, capsules, tablets or the like. The product and the product composition have the functions of adjusting the secretion of hormones, improving the sleeping quality, enhancing the memory ability, reducing blood fat, inhibiting platelet aggregation, improving hyperglycemia symptoms, improving the immunity of human bodies, promoting metabolism and the like, obvious curative effects on climacteric syndrome, puberty essential uterine bleeding, and antenatal or postpartum weakness of women and a very obvious effect on fatigue caused by working pressure and life pressure as well as the physiology regression of middle-aged and aged people. The maca and oyster in the composition are food eaten for thousands of years, and the toxic and side effects of the maca and oyster are not found. The product and the product composition can also contain tartary buckwheat so as to give full play to a relatively good anticancer effect.

The present invention provides a montmorillonite/ZSM-5 molecular sieve composite material and its preparing method. The montmorillonite/beta molecular sieve composite material is prepared by evenly mixing montmorillonite with ZSM-5 molecular sieve gelatin, then processing home position crystallization, and via filtering, washing and drying. The composite material have structure characteristics of the montmorillonite and the molecular sieve at the same time, the montmorillonite and the molecular sieve are alternative. The synthetic montmorillonite/ZSM-5 molecular sieve have characteristics of small crystal grain molecular sieve by controlling the synthetic course and the conditions. The preparing method is simple, the easily separating, the molecular sieve composite material has better water-heat stability. The composite material are mainly used for all kinds of catalysts and absorption agents, especially the preparing of hydrogenation catalyst.

A rotary hearth furnace iron-making method utilizing biomass carbon-containing pellets to serve as a raw material belongs to the field of ferrous metallurgy and relates to a rotary hearth furnace iron-making process using the biomass to serve as iron-making fuel and a reducing agent. The process comprises the steps, utilizing reproducible carbon neutral biomass coke powder to replace pulverized coal, enabling the biomass coke powder and the iron ore powder to be matched with each other according to C/O=1.1-1.4, adding an appropriate binder, evenly mixing to make pellets, and enabling the pellets to enter a rotary hearth furnace to be heated and undergo reduction so that a metalized pellet is obtained. The biomass coke has carbon neutral and can fundamentally reduce discharge of pollutantssuch as CO2 caused by coal consumption. The impurity content of the biomass coke is little, the problem that sulphur content of products caused by coal using is too high is solved, and the comprehensive quality of the products is improved. The energy in the preparation process of the biomass coke can be supplied by biomass itself, and green circulating production is substantially achieved. The rotary hearth furnace iron-making method expands energy sources for rotary hearth furnace iron making, reduces production cost, improves product quality and production efficiency and reduces environmental pollution.

The invention relates to a preparation method of low cost graphene / CNTs aerogel for adsorption of heavy metal ions, the preparation method includes preparing of a graphene oxide / CNTs dispersion liquid, preparing of magnetic graphene oxide / CNTs, preparing of a magnetic graphene oxide / CNTs / chitosan suspension, preparing of a hydrogel by hydrothermal reaction, and preparing of the grapheneaerogel by freeze drying. Chitosan is added to graphene oxide for modification to enhance the heavy metal ion adsorption ability of the graphene oxide, the graphene oxide and carbon nanotubes form a three-dimensional structure, the carbon nanotubes as a skeleton of a graphene oxide sheet to form the stable three-dimensional structure to avoid curling and agglomeration of the graphene oxide, magnetic nanoparticles are dispersed in the three-dimensional skeleton, the graphene oxide and the chitosan have large reserves, and the method is simple and low-cost.

The invention discloses a tailing-based cementing material and a preparation method thereof. The method comprises the following steps: drying a tailing raw material, and sequentially carrying out mechanical ball-milling activation treatment, thermal activation treatment and chemical agent activation treatment to obtain the tailing-based cementing material. According to the method, tailings are activated through a mechanical activation, thermal activation and chemical activation combined excitation method, the potential volcanic ash activity is utilized, the cementing material with better cementing performance is obtained, the maximum compressive strength of the solidified gel material can reach 10 MPa, the solidified gel material completely meets the underground filling technology, the solidified leachate meets the surface water quality IV type water standard, the method is simple in tailing treatment process, safe and free of pollution, and a brand-new thought can be provided for comprehensive utilization and resourceful treatment of tailings.

The invention provides a chain type hydrogen and oxygen production integrated method, comprising the following steps: CuFe2O4 and solid carbonaceous matters are subjected to reduction reaction to obtain reduction products of Cu, Fe and FeO, wherein the Fe, the FeO and vapour are subjected to oxidation reaction to generate H2 and Fe3O4, and the residual Cu is in oxidation reaction with the Fe3O4 and air to generate CuFe2O4 by oxidation; and the CuFe2O4 is heated and decomposed to generate O2 and CuFeO2, and the CuFeO2 and air are in oxidation reaction to generate CuFe2O4 once again. The invention also provides a device for realizing the method, which comprises the main assemblies of a bubbling fluidized bed reactor, a cyclone separator, a sealing valve and a rapid fluidized bed. The invention can obtain H2 and O2 by chain type continuous preparation, has simple process and low energy consumption, can obtain H2 and O2 with the high purity approximate to 100%, realizes CO2 zero emission in the hydrogen production process and has broad application prospect.

The invention provides a n- type Mg-Sb based room temperature thermoelectric material. A chemical general formula of the material is Mg3+DeltaMnxSb2-y-zBiyAz, wherein A represents oxygen family elements such as S, Se or Te, Delta is greater than or equal to -0.2 and is less than or equal to 0.3, x, y and z represent atomic ratios, x is 0.001-0.4, y is 0-1.0 and z is 0-0.2. The preparation method comprises the steps of selecting single elements with purity greater than or equal to 99% as raw materials according to the chemical general formula, proportioning and weighing the raw materials separately in an argon atmosphere, then putting the raw materials in a ball milling machine, adding stainless steel balls into the ball milling machine, and obtaining powder after the ball milling machine rotates at high speed; weighing the powder separately and then putting the powder in a graphite mold, then putting the mold in a high-temperature furnace, vacuumizing, sintering when the total air pressure is less than 4Pa, then cooling to room temperature after the sintering is ended. The thermoelectric material provided by the invention has higher room temperature thermoelectric figure of merit and better mechanical performance than traditional n-type bismuth telluride, and is low-cost; and the preparation method is easy to operate, is lower in cost, and has high controllability and repeatability.

A method for treating a subsurface formation with a ferrous compound, to reduce a contaminant therein, involves introducing into the subsurface formation a ferrous compound in combination with sodium hydrosulfite in an amount sufficient to substantially prevent precipitation, during the introducing, of a major portion of the ferrous compound. The method was found to be useful in the reduction of hexavalent chromium to trivalent chromium at a Superfund site.