835 results about "Manganite" patented technology

Disclosed is a sputtering target that can suppress the occurrence of anomalous discharge in the formation of an oxide semiconductor film by sputtering method and can continuously and stably form a film. Also disclosed is an oxide for a sputtering target that has a rare earth oxide C-type crystal structure and has a surface free from white spots (a poor appearance such as concaves and convexes formed on the surface of the sputtering target). Further disclosed is an oxide sintered compact that has a bixbyite structure and contains indium oxide, gallium oxide, and zinc oxide. The composition amounts (atomic %) of indium (In), gallium (Ga), and zinc (Zn) fall within a composition range satisfying the following formula: In/(In+Ga+Zn)<0.75

The invention discloses a production method for manganese sulfate by using low-grade manganese ores. According to the method, manganese sulfate with high purity can be produced by using waste low-grade manganese ores with manganese content of 10% to 20%, manganese tailing or manganese-containing solid waste residue. The method comprises the steps of preparation of raw materials, a slaking reaction, a leaching reaction, neutralization and purification of leachate, etc. According to the invention, production of manganese sulfate is not restricted by the grade of manganese ores, and low-grade manganese oxide ores with a grade greater than 10%, manganese tailing or manganese-containing solid waste residue can be fully utilized; produced manganese sulfate has high yield and high purity and is a very important industrial fundamental product; almost no external heat supply is needed, low energy consumption is achieved, production cost is low, it does not need to turn over and mix materials in the process of the reactions, the reactions are smooth, no toxic gas is generated, and no environmental pollution is produced; discharge of three wastes (waste gas, waste water and industrial residue) reaches national discharge standards for environmental protection, and there is no dust pollution in a workshop.

A memory device is formed of the one transistor cell type. Such a device has a substrate, a ferroelectric layer which is a film of rare earth manganite, and an interfacial oxide layer being positioned between the substrate and the ferroelectric layer. The invention includes such a device and methods of making the same.

The invention relates to an air purification material and a preparation method and application thereof, belonging to the technical field of chemical catalytic decomposition, in particular belonging to the technical field of decomposition of formaldehyde pollutants in environment air. The air purification material comprises a base material and manganese oxide, wherein the manganese oxide is supported on the base material, the base material is honeycomb ceramics or a fiber material with a particle filtering function, and the manganese oxide is birnessite manganese oxide prepared from permanganate and oxalate. The air purification material can effectively decompose formaldehyde pollutants in indoor air and can rapidly and constantly remove the formaldehyde pollutants in indoor air at room temperature. The air purification material can be regenerated through heating, so that the service life of the material is prolonged and the practical application is facilitated.

The invention provides a use of a manganite catalyst in catalytic oxidation of formaldehyde. The manganite is gamma or/and delta crystal form manganese dioxide. The delta crystal form manganese dioxide as a formaldehyde catalytic oxidation catalyst has the advantages of 1, a formaldehyde catalytic oxidation ignition temperature is low, a conversion ratio is 37% under conditions of a high formaldehyde concentration of 170ppm, a high airspeed of 100000mL/(g.h) and a temperature of 50 DEG C, conversion is complete at a temperature of 80 DEG C and the activity of the unprecious metal catalyst is high on the list, and 2, stability is excellent, the crystal form before and after catalytic reaction is stable and a catalytic conversion rate is kept in a long-term activity test.

The invention discloses an improved device and method for producing electrolytic manganese metal by a two-ore method. The method comprises the following steps of leaching, purifying, deeply purifying and electrolyzing; and two ore raw materials for electrolyzing the manganese metal by the two-ore method are low-grade manganese oxide ores and pyrite ores respectively, wherein the low-grade manganese oxide ores are with the manganese content of 15-25%, and the pyrite ores are tailings (the pyrite ores) of the mineral dressing of non-ferrous metal ores or primary ores. The method has the advantages that a product contains C and S, has low impurity and short production flow, is used for deeply purifying a manganese sulfate solution to eliminate the influence of reductive impurities in the solution on the electrolytic process, thereby realizing the normal electrolytic production and improving the quality of products. The method especially creates ways for the development and the utilization of low-grade lean manganese oxide ores and tailings (the pyrite ores) of the mineral dressing of non-ferrous metal ore.

A production technology of preparing manganeisen from low grade manganese mine. Low grade manganese mine with a metal manganese content of 15-30% is dried, added with reducing agent, catalyst, solvent and bonding agent and mixed well to prepare a composite material; the low grade manganese mine composite raw material is placed in a rotary kiln or a tunnel kiln, heated to 400+/-80 DEG C by energy of gas or natural gas with an air excess coefficient controlled at 0.9-1.0, with a heating speed of 1-4 DEG C / min at a normal temperature, wherein the furnace is kept in a weak reducing atmosphere, and insulated for 0.5-5 h; then the low grade manganese mine composite raw material is heated to 750+/-80 DEG C with a heating speed of 2-5 DEG C / min and insulated for 0.5-5h; finally the low grade manganese mine composite raw material is heated to 1100+/-150 DEG C and insulated for 0.5-6h; gas pressure in the furnace is kept at 0.12-0.15 MPa during heating and insulation; after the reaction, the material is cooled and treated with magnetic separation to obtain the manganeisen and tailings. The manganeisen comprises 15-20% of metal Fe, 65-75% of metal Mn, less than 5% of gangue, 1.0-6.5% of carbon, less than 0.15% of phosphor and less than 0.15% of sulfur, can be used as a raw material for smelting of high-quality manganeisen by a converter or an electric furnace and has low cost and wide application prospect.

The invention provides a nickel cobalt lithium manganite precursor of a nanosheet agglomeration secondary particle. The growth mode inside the precursor is hexagonal nanosheets which are stacked, the side length of the hexagonal nanosheet is 200-500 nanometers, and the thickness is 70-200 nanometers; the particle size of the agglomeration secondary particle D10 is bigger than or equal to 6 micrometers, D50 is equal to 9-15 micrometers, and D90 is smaller than or equal to 30 nanometers. The preparing method of the nickel cobalt lithium manganite precursor of the nanosheet agglomeration secondary particle comprises the steps of firstly preparing a soluble mixed brine solution, adding ammonium hydroxide as a base solution of a reaction kettle, and adjusting the pH of the base solution to be 11-12; inflating nitrogen into the reaction kettle and starting stirring; adding the soluble mixed brine solution, a strong alkaline solution and ammonium hydroxide into the reaction kettle for a stirring reaction, after the reaction for some time, making unqualified feed circularly pumped into the reaction kettle, and aging, compressing and washing an overflowed feed; after washing, drying, screening and storing the material. The nickel cobalt lithium manganite precursor of the nanosheet agglomeration secondary particle is better in uniformity and electrochemical performance; moreover, the product stability is good.

The invention discloses a new preparing method of manganese sulfate through manganese oxide in the manganese ore in the leaching manganese ore extracting and manufacturing technological domain, which comprises the following steps: grinding manganese ore; moulding ore paste through water; adding sulfuric acid and waste molasses in the ore paste; stirring at 40-100 deg.c to obtain leaching liquid; neutralizing the leaching liquid through limestone; adding ammonia sulfate to remove heavy metal ion; adding ammonium fluoride solution to remove Ca2+, Mg2+; evaporating; condensing; crystallizing; drying to produce manganese sulfate with over 98 percent purity and 93 percent manganese collecting rate.

The invention discloses a synchronous desulphrization and denitration method of flue gas pyrolusite pulp for reclamation. The method mainly comprises the following steps: pyrolusite, water and metal-chelator are prepared into pulp which is taken as an absorbing agent; sulfur dioxide and nitrogen oxides in the flue gas are synchronously absorbed and removed by the absorbing agent; the flue gas is discharged when the purification reaches a standard; the primary product of the mixed mother solution of manganese sulfate and manganese nitrate is obtained after absorbing tail solution is purified; and by utilizing the different solubility of manganese sulfate and manganese nitrate at same temperature, the mixed mother solution is heated firstly to cause the manganese sulfate therein to be crystallized and separated, next, the left mother solution is cooled to cause the manganese nitrate therein to be crystallized and separated, and the left solution is returned to preparation pulp for recycling. No waster water is discharged in the whole process, thereby achieving the purposes of controlling waste by waste, recycling sulfur resources and improving the comprehensive utilization value of pyrolusite. The method is characterized by high desulphrization and denitration efficiency and manganese utilization rate, little secondary pollution, obvious economic benefit and the like.

A gray manganese ore leaching-out process is carried out by crushing, blending with water to obtain ore pulp, adding into sulfuric acid and sugar honey alcohol effluent, agitating at 50-98degree and reacting for 0.5-4hrs to obtain the final product. The leaching-out rate of manganese is >93%. It's simple, has gentle reactive condition and no environmental pollution.

The invention relates to a structure of a grinding material composited with a novel high-shrinkage engineering ceramic binder for the preparation of a grinding wheel and a preparation method thereof. The preparation method is characterized in that: the high-strength high-shrinkage engineering ceramic binder which is prepared from clay, feldspar, boracic glass, bentonite and manganite is composited with the mixed grinding material, the opacifying effect of the boracic glass promotes the glass nucleation, fluxing agents bentonite and manganite powder promote the preparation of the high-strengthhigh-shrinkage engineering ceramic structure, and the ceramic binder for the steel ball grinding wheel is prepared through carrying out cold-press high-pressure molding, and sintering at a certain temperature. Compared with market products, the strength, the combination degree, the elastic modulus and the linear velocity in usage of the steel ball grinding wheel are greatly improved, the geometric dimension of the steel ball grinding wheel is stable, the steel ball grinding wheel which has a high strength, a high hardness and a uniform tissue density and has the advantages of large grinding ratio, high fineness and no workpiece burning under high speed grinding conditions is a special grinding wheel for a novel high efficiency steel ball. So the steel ball grinding wheel can be widely applied to the mechanical steel ball manufacturing industry and is easy to be automated in the industry.

The invention discloses a production method of electrolytic manganese metal, which sequentially comprises the following steps: (1) simultaneously adding mixed ore powder of manganese dioxide ores, sulfurous iron ores and manganese carbonate ores and sulfuric acid into a leaching combination tank, heating to 90-95 DEG C, performing leaching combination reaction for 4-6 hours, and performing solid-liquid separation to obtain a rough manganese sulfate solution; (2) performing two-stage purification on the rough manganese sulfate solution to remove impurities, wherein in the primary purification process, SDD or BaS is added for impurity removal, and then aluminum sulfate is added for purification; and in the secondary purification process, 10-30% of deep impurity removal agent is added, and then ammonium sulfide is added for zinc removal; reacting for 1-2 hours, checking and regulating the pH value to 6.0-8.0, performing pressure filtration, then transferring into a standing tank, and standing; and (3) injecting the purified manganese sulfate solution into an electrolytic tank, controlling the pH value of an electrolytic tank solution to be 7.0-8.0, and electrolyzing for at least 24 hours to obtain the electrolytic manganese metal product. According to the method disclosed by the invention, manganese ore resources are reasonably utilized, and the production cost is lowered.

The invention relates to assistant materials used for continuous casting of steelmaking, in particular to a high casting speed continuous casting covering slag used for ultra-low-carbon steel, comprising pre-melt material and accessory material. The percentage proportion of chemical components of the pre-melt material is as follows: 30 to 40 percent of CaO, 35 to 45 percent of SiO2, 3 to 10 percent of Al2O3, 1 to 5 percent of MgO, 4 to 8 percent of F, 6 to 12 percent of Na2, 0.5 to 3 percent of B2O3, and the rest is micro-impurity contained in the materials. The alkalinity, namely CaO/SiO2, of the pre-melt material is 0.70 to 1.05; the viscosity is 0.2 to 0.5Pa.s; and the pre-melt material is processed by pre-melting. The accessory material comprises 0.7 to 0.9 percent of simple-substance carbon and 0.25 to 1.5 percent of boron flame retardant, wherein a small part of the boron flame retardant is added in the form of borax and the majority of the boron materials is pre-melted into the pre-melt material; and the content of B2O3 in the pre-melted slag is 0.5 to 3 percent. The accessory material also comprises 0.2 to 0.8 percent of CaSi powder and 0.8 to 4.0 percent of manganese minerals. The high casting speed continuous casting covering slag not only can effectively reduce the carburetion of the covering slag to molten steel, but also can avoid negative impact on the metallurgical physicochemical property of the covering slag.

The invention discloses a recycling method of a positive electrode piece of a lithium ion battery, aiming at solving the problem of recycling of a nickel cobalt lithium manganite (nickel cobalt lithium aluminate) positive electrode piece and a lithium cobaltate positive electrode piece generated in a production process of the lithium ion battery. According to the technical scheme disclosed by the invention, the recycling method comprises the following steps: 1, crushing the electrode pieces by classes; 2, immersing with an organic solvent; 3, carrying out stirring treatment; 4, filtering with a sieve net; 5, carrying out centrifugal separation; 6, immersing with an alkaline solution; 7, carrying out the centrifugal separation again; 8, drying and removing iron; 9, carrying out ICP (Inductively Coupled Plasma) analysis; and 10, calcining the materials. The recycling method disclosed by the invention can be used for effectively recycling waste materials of the positive electrode pieces of the waste lithium ion batteries, so that the cost is saved; and by immersing with the alkaline solution and carrying out a plurality of times of separation and washing, impurities, such as metal aluminum, in powder grains can be effectively removed. With the adoption of the recycling method, a positive electrode material and an aluminum foil can be completely separated, and the positive electrode material keeps a relatively good structure and electrochemical properties; and the synthesis of a precursor is not needed and the adding amount of a lithium salt is relatively less.

The invention discloses a method for restraining the generation of manganous dithionate in the process of leaching sulfur dioxide gas out of pyrolusite, which comprises the following main technical measures: (1) pyrolusite pulp is prepared by stirring and mixing in the proportion that 100-500g of pyrolusite and 0.2-100g of granular active carbon are added into 1L of water; (2) in a synchronous reaction process of absorbing the sulfur dioxide gas by the pyrolusite pulp, desulphurizing and leaching manganese, the pH value of the pyrolusite pulp is controlled to be lower than 3.5 by blowing oxygen or air into the pyrolusite pulp. The method restraining the generation of the manganous dithionate does not need to extra consume sulphuric acid and guarantee an oxido-reduction potential by extra adjusting the concentration of Fe<3+>/Fe<2+>, is easy to meet the requirement of industrial process production and can guarantee the concentration of a manganese sulfate mother liquor.

The invention provides a modified nickel, cobalt and lithium manganite three-element material and a titanium dioxide layer compounded on the surface of the nickel, cobalt and lithium manganite three-element material. The titanium dioxide layer is creatively compounded on the surface of the nickel, cobalt and lithium manganite three-element material, the surface microstructure change of the NCM three-element material in the first-time charging process is effectively decreased, and the first-cycle efficiency is improved. In addition, due to the fact that titanium dioxide serves as a shell layer and form a core-shell structure with the NCM material, only lithium ions can pass through the titanium dioxide layer, and nickel and manganese ions cannot pass through, dissolution of Ni and Mn in the three-element material in the cycling process is reduced, and the cycle performance of the three-element material is optimized.

The invention provides a method for producing manganese sulfate from manganese oxide ores. The method comprises the steps of mixing the manganese oxide ore powder with an appropriate amount of carbon reducing agent such as pulverized coal evenly, adding concentrated sulfuric acid without adding water and mixing evenly to obtain a mixture, controlling the initial concentration of the sulfuric acid in the mixture to be greater than or equal to 70%, curing the mixture by use of reaction heat via self-heating reduction and reducing the quadrivalent manganese in the manganese ores into bivalent manganese, mixing the cured material with water for stirring and leaching, and filtering the leached ore pulp to obtain a leachate, adding an appropriate amount of manganese oxide ores to the leachate to realize the oxidative decomposition of manganese dithionate, and performing neutralization, purification and impurity removal and crystallization on the solution obtained by filtering to produce the manganese sulfate. The method has the advantages that the low-cost easily available carbon reducing agent such as the pulverized coal is utilized to directly reduce the manganese oxide ores at a low temperature, and therefore, the energy consumption and the cost are low and the smoke pollution problem of reducing roasting is avoided; the manganese oxide ore powder is utilized to realize the oxidative decomposition of the manganese dithionate in the manganese sulfate solution and therefore, the quality of the manganese sulfate product is improved.

A sputtering target including indium, tin, zinc and oxygen, and including a hexagonal layered compound, a spinel structure compound and a bixbyite structure compound.

A high-activity deoxidant for the deep deoxidization of N2, H2, CO, CH4, C2H4, C3H6, etc is composed of active component (the low-valence oxide of Mn and Fe) and the carrier chosen from cement, gypsum, kaolinite, alumina, diatomite, etc. Its preparing process is also disclosed.

The invention provides a method for treating ammonia nitrogen wastewater, which relates to a method for treating the ammonia nitrogen wastewater by using an adsorption method. The method is characterized in that in the treating process, a natural manganese mineral is used as an adsorbent to perform adsorption reaction with the ammonia nitrogen wastewater so as to remove the ammonia nitrogen in thewastewater. The natural manganese mineral is crushed into a manganese mineral adsorbent of 0-2 millimeters, the pH value of the wastewater containing the ammonia nitrogen is adjusted to be between 2and 12 by using acid or alkali, then the manganese mineral adsorbent contacts and is mixed with the ammonia nitrogen wastewater to perform adsorption, and the adsorption can be performed by adopting afixed bed adsorption column or in a stirring and mixing mode. When the fixed bed adsorption column is adopted for adsorption, the manganese mineral after being crushed is classified to remove fine particles for the best so as to improve the permeability of the adsorption column; and in the same way, when the stirring and mixing mode is adopted, the manganese mineral after being crushed is classified to remove coarse particles for the best so as to reduce the abrasion to equipment. The natural manganese mineral applicable to the method comprises a terrestrial manganese oxide mineral, an oceanpolymetallic nodule, an ocean cobalt-rich incrustation and a terrestrial manganese nodule, the natural manganese minerals usually contain manganese minerals of cryptomelane, todorokite, birnessite, vernadite, rancieite, pyrolusite and the like, have good pore structure and large specific surface area so as to have good adsorption property, and can be used as the adsorbent for treating the ammonianitrogen wastewater after being crushed into certain particle size, and the manganese minerals have the advantages of simple process, easy reproduction and stable performance.

The invention discloses a method for dry desulfurization and demercuration of sintering flue gas containing mercury by means of low-grade pyrolusite. The method comprises the steps that 1, the low-grade pyrolusite is obtained and placed in a reactor; 2, dedusting is conducted on the sintering flue gas to remove dust containing sulfur and mercury in the sintering flue gas, then the dedusted sintering flue gas with the temperature of 100-200 DEG C is introduced into the reactor at the flow rate of 1-8 L/min to enable the sintering flue gas to make contact with the low-grade pyrolusite, SO2 in the sintering flue gas reacts with the low-grade pyrolusite to achieve desulfurization, and residual mercury in the sintering flue gas is adsorbed by pyrolusite to achieve demercuration; 3, the sintering flue gas subjected to desulfurization and demercuration is directly discharged through an exhaust port of the reactor. The method has the advantages that desulfurization and demercuration cost is low, desulfurization and demercuration efficiency is high, the process is simple, and the recovery rate of byproducts is high.