98 results about "Manganese monoxide" patented technology

The invention discloses a method and a device for reducing and roasting manganese dioxide into manganese monoxide in electrolytic manganese industry. The method comprises the following steps: dried manganese dioxide mineral powder is ground, well mixed with reducing powder and conveyed to a feeding bin on the top of a roasting furnace, and then enters hermetic roasting devices; a plurality of burners are arranged among the hermetic roasting devices; fuel is burnt so as to roast manganese dioxide ore; the manganese dioxide ore and the reducing powder are heated and roasted to 900 to 970 DEG C in the hermetic roasting devices with no oxygen supplement; under the circumstance of oxygen-free contact after reaction in the lower ends in the hermetic roasting devices, the temperature of roasted manganese ore is lowered, so as to recover heat and cool the manganese ore; and finally, the manganese ore is discharged out of a furnace by an automatic discharging device and then is subjected to a subsequent process. The method and the device can reduce and roast the high/low-grade manganese dioxide ore, have the advantages of low production cost, simple process and convenient operation, can control the reduction rate of manganese dioxide and other metals through the automatic discharging device, and improve the quality of final products.

The invention relates to a nitrogen-doped carbon-coated manganese monoxide composite material with a one-dimensional porous core-shell structure and a preparation method of the nitrogen-doped carbon-coated manganese monoxide composite material. The composite material is doped with nitrogen, is in a one-dimensional porous carbon-coated manganese monoxide core-shell structure; manganese monoxide is in a nano rodlike structure; and an outer layer of a manganese monoxide nanorod is coated with an amorphous carbon layer. The nitrogen-doped carbon-coated manganese monoxide composite material is obtained by an in-situ polymer coating method accompanied by burning. The preparation method of the composite material is simple and novel, and high in adjustability; and meanwhile, nitrogen-doped carbon can store lithium ions. Due to the ingenious design, the specific capacity of the composite material exceeds the theoretical specific capacity of the manganese monoxide; furthermore, according to the composite material, the problems of low capacity and fast attenuation caused by poor conductivity and high volumetric strain of a pure manganese monoxide material are solved; and the composite material has excellent electrochemical properties, cycle lifetime and structural stability.

The invention discloses a carbon-coated porous manganese monoxide core-shell structure composite material and a preparation method and an application thereof. The preparation method comprises the following steps: firstly, with styrene as a carbon source and potassium peroxodisulfate as an initiator, carrying out soap-free emulsion polymerization to obtain a polystyrene microsphere template, and then carrying out surface modification on microspheres with concentrated sulfuric acid; with common manganese sulfate as a manganese source, preparing manganese carbonate particles embedded with a plurality of polystyrene microspheres by a liquid phase deposition method, and then adding a shell layer material to coat the particle surfaces with a carbon layer; and finally, carrying out high-temperature carbonization to obtain a novel carbon-coated porous manganese monoxide core-shell structure composite material. The composite material is spherical particles with uneven surfaces; and the spherical particles comprise manganese monoxide grains, multi-scale holes and the carbon layer. The special structure with the carbon layer and the multi-scale holes can play a role in buffering volume expansion of manganese monoxide in the repeated charging and discharging processes. The composite material disclosed by the invention has excellent cycling stability and rate capability as an anode material for a lithium-ion battery.

The invention discloses a method for preparing a manganese sulfate solution by using a two-ore method. The method for preparing the manganese sulfate comprises: crushing manganese ore to grains less than 2mm by using a crusher; grinding the manganese ore into 100 mesh slurry by using a wet grinder; grinding iron pyrite containing less than 32 percent of sulfur into 100 mesh slurry by using the same wet grinder; mixing the slurry of the manganese ore with the slurry of the iron pyrite; adding water and sulfuric acid into the mixture; and carrying out heating reaction, iron removal, heavy metal removal, neutralization and pressure filtration and obtaining the manganese sulfate solution. Due to the technical proposal, the method for preparing the manganese sulfate solution has the advantages of small sulfuric acid consumption, low production cost, high content of manganese of products, high recovery rate of manganese and so on compared with the prior art, wherein the content of manganese of the products is increased to 98 to 99 percent from original 60 to 65 percent, and the recovery rate of manganese is up to 85 percent. The products can be used for deep processing of various high-purity manganese products such as electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade manganese monoxide and chemical manganese dioxide.

The invention relates to a preparation method of mangano-manganic oxide, belonging to the technical field of inorganic non-metallic material, wherein the purified manganese ore extract, manganese sulfate solution, is used as raw material; carbonate (bicarbonate) is used as precipitating agent; the manganese ion in the manganese sulfate solution is precipitated into manganese carbonate sediment, which is then thermal oxidized and decomposed into a manganese admixture containing manganese dioxide, manganese monoxide and manganese carbonate with air or oxygen at a temperature of 120 DEG C to 800 DEG C, and then calcined into mangano-manganic oxide at a temperature of 800 DEG C to 1200 DEG C. The invention has the advantages that the dust cloud of manganese admixture is practically avoided during the process of preparation; the recovery rate of manganese is high; the obtained mangano-manganic oxide has dramatic activity and the cost is low.

The invention provides a nano-scale manganese monoxide-conductive carbon black composite material and a synthetic method thereof. According to the synthetic method, a commercial low-cost conductive carbon black is used as a substrate to have oxidation-reduction reaction with potassium permanganate. The synthetic method comprises the following steps: generating nano-scale manganese oxide nano sheet-conductive carbon black composite particles at first, and then roasting in a reducing atmosphere or inert atmosphere to obtain a final nano-scale manganese monoxide-conductive carbon black composite material. The process is simple in operation, accords with environmental requirements, and is low in reaction equipment requirement, low in production cost and very suitable for industrial production. The prepared manganese monoxide-conductive carbon black composite material has excellent performance when being applied to a cathode of a lithium ion battery.

The invention relates to a controllable preparation method of Ag-manganese monoxide nanorods and especially relates to a method for controllable preparation of the Ag-manganese monoxide nanorods by an in-situ oxidation-reduction reaction technology. The method solves the problems of the prior art of pure one-dimensional manganese monoxide preparation and especially solves the problems of one-dimensional nanomaterial preparation adopting the simple and mild method, and the problems comprise manganese organic compound use, high-temperature reaction and multi-valence state coexistence in the reaction.

The invention provides a preparation method of ternary layered positive electrode material for a sodium ion battery. The preparation method comprises the following steps: mixing sodium carbonate, manganese monoxide, ferrous oxide and nickel oxide according to a given ratio, adding deionized water, preparing the mixture slurry with a solid content of 30 to 45 percent, ball milling, obtaining a uniformly-mixed raw material with small particles, obtaining a precursor in an atomizing manner, wherein the precursor consists of spherical particles formed by clustering small particles, calcining the spherical particles at high temperature, preserving the heat for a given time, cooling, and obtaining the needed NaMn1-x-yFexNiyO2(x is greater than 0 and less than 0.5, and y is greater than 0 and less than 0.5) positive electrode material. The ternary layered positive electrode material for the sodium ion battery synthesized in the invention has the spherical particle appearance characteristic and nano porous internal structure, so that the transport distance of the sodium ions between the interior of a material lattice and electrolyte can be reduced, and the electrochemical performance of the material can be improved.

The invention discloses a preparation method of a carbon-coated-manganese oxide/nitrogen-doped reduced graphene oxide anode material for a lithium ion battery. The preparation method comprises the following steps: using manganese acetate, graphene oxide and saccharose as main raw materials; firstly, obtaining a compound of manganese carbonate and reduced graphene oxide by adopting a microwave-hydrothermal method; secondly, obtaining a compound of carbon-coated manganese carbonate and the reduced graphene oxide by a traditional hydrothermal method; finally, carrying out heat treatment on the compound in an atmosphere furnace to obtain carbon-coated-manganese oxide particles, and loading the carbon-coated-manganese oxide particles on a reduced graphene oxide sheet; meanwhile, realizing nitrogen doping of graphene oxide, wherein the material can be used as a high-performance anode material of the lithium ion battery. According to the synthetic method, the graphene oxide is introduced into the first-time hydrothermal treatment process for improving poor electrical conductivity of MnO, and uniformly dispersing MnO particles on the surface of graphene; in the second-time hydrothermal treatment process, the surfaces of the MnO particles are coated with uniform carbon layers; a carbon shell is used as an elastic limiting body and can be used for preventing aggregation and pulverization of the MnO particles in the charge/discharge process; a buffer zone with volume expansion is provided for improving the cyclic stability of the material serving as the lithium ion battery to a great extent.

The invention provides a method for preparing manganese sulfate from low-grade manganese slag, which comprises: the slurry of manganese ore and the slurry of iron pyrite are subjected to heating reaction, iron removal, heavy metal removal, neutralization and pressure filtration to form a manganese solution of which the concentration is 150 to 200g/L; and the manganese solution is pumped for crystallization and purification. The crystallization and purification comprises crystallization, solid-liquid separation, dissolution, pressure filtration and so on. The method uses rich low-grade manganese ore containing 10 to 20 percent of manganese as a raw material to produce a high-purity manganese sulfate solution which is used for deep processing of various high-purity manganese products such as electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade trimanganese tetroxide and manganese monoxide, chemical manganese dioxide, industrial manganese sulfate monohydrate, chemical manganese sulfate monohydrate, medical manganese sulfate monohydrate, food manganese sulfate monohydrate, and analytical pure manganese sulfate monohydrate.

The present invention discloses a one-dimensional porous carbon coated manganese monoxide composite electrode material for lithium ion battery negative electrodes, and a preparation method thereof, wherein the porous carbon-coated manganese oxide particles in the composite material are integrally aggregated in the form of a one-dimensional rod shape, the particle size of the porous carbon coated manganese monoxide particles is 10-20 nm, and the one-dimensional porous carbon coated manganese monoxide composite electrode material is prepared by carrying out one-step thermal treatment on a metalorganic framework. According to the present invention, with the application of the composite material as the lithium ion battery negative electrode, the advantages of high initial coulombic efficiency, high specific capacity, excellent cycle performance, excellent rate performance, long cycle life and the like can be provided; and the preparation method is simple, has the low cost, and is suitablefor industrial large-scale production.

The invention discloses a method for producing high-purity manganese monoxide, which comprises the following steps: crushing an electrolytic manganese metal which is used as a raw material into a certain fineness, heating the electrolytic manganese metal powder to between 400 and 1,000 DEG C, introducing water vapor and inert gas or water vapor and carbon dioxide into the powder, thermally treating the mixture for 2 to 8 hours, and cooling the mixture to room temperature to obtain the high-purity manganese monoxide. The method has the advantages of sufficient, cheap and pure raw material, simple preparation process, low production cost, no environment pollution and high product purity.

The invention discloses a manganese monoxide/graphene composite material used as a negative electrode of a lithium ion battery and a preparation method of the composite material. The composite material is prepared by the steps of (1) dissolving a manganese source and a soft template into polyalcohol to obtain a mixed solution; (2) performing a backflow reaction, cooling, centrifuging, washing, anddrying to obtain manganese alcohol salt; (3) performing calcining and cooling to obtain a manganese monoxide precursor; (4) putting the precursor into a graphene oxide water solution, and performingstirring, freezing and drying to obtain blank powder; and (5) performing a reaction between hydrazine hydrate steam and the black powder, and then carrying out cooling, filtering, washing and drying.The composite material provided by the invention adopts a hollow structure; the granule surface is coated with graphene; the initial discharge capacity per gram can be as high as 1,065.1mAh/g at 0.01-3.00V and 70mA/g; the initial efficiency can reach 77.4%; the discharge specific capacity still can be 360mAh/g at 3,500mAh/g after 160 cycles; and the method is simple, low in cost and suitable for industrial production.

The invention relates to a preparation method of high-purity manganese monoxide. The preparation method comprises the following steps: smashing electrolytic manganese metal into pieces to obtain manganese particles; putting the manganese particles into an atmosphere furnace; introducing oxidizing gas into the atmosphere furnace, and expelling air in the furnace; warming the atmosphere furnace; when the temperature of the atmosphere furnace reaches 700 to 750 DEG C, proceeding into a constant-temperature calcining stage, and keeping constant-temperature calcination for a period of time; after the constant-temperature calcination is ended, introducing reducing gas, and carrying out natural cooling on material in the furnace; after the temperature of the material in the furnace is reduced, taking the material out of the furnace; and grinding the obtained material to obtain the high-purity manganese monoxide. The preparation method is simple in preparation technology, easy to operate, low in raw material cost and sufficient in raw materials; and the technology is low in production cost, and is easy to realize industrial scale production. The manganese monoxide prepared in the invention is high in purity, and the chemical composition and physical performance of the manganese monoxide can meet the requirement for chemical composition and physical performance of lithium ion battery material lithium manganate.

The invention provides a preparation method for a black ceramic pigment. The preparation method comprises the following steps: 1) uniformly mixing electric furnace smelting stainless steel fly ash containing an iron element with chromic oxide, nickel monoxide and manganese monoxide according to a molar ratio of Fe to Cr to Ni to Mn being equal to1:(0.8-1.3):(0.5-1.1):(0.7-1.2), so as to obtain a mixture material; and 2) placing the mixture material in a microwave field, microwave-heating in an air atmosphere, while a temperature of the mixture material rises to 1050-1200 DEG C, preserving heatfor 10-20 min, taking out the roasted material from the microwave field, and cooling to room temperature, so as to prepare the black ceramic pigment. The method uses the industrial solid waste electric furnace smelting stainless steel fly ash as a raw material, so that while transition metal elements richly contained in the fly ash are greatly used, the effect on the environment by emission thereof is eliminated, and defects that sintering time is long, a needed temperature is high and energy consumption is high caused by of preparing the black ceramic pigment by using an industrial solid waste currently. The prepared black ceramic pigment has the characteristics of high blackness, pure color generation and good coloring property.

The invention belongs to a refractory symbiotic ore biochemical and chemical metallurgical technology, in particular relates to a method for carrying out comprehensive treatment on the refractory symbiotic ore with ferric content and manganese content of being less than 20wt%. The method provided by the invention comprises the following technological steps of: with cellulose-containing plant waste as a reducing agent and limestone as an active agent, respectively smashing the reducing agent, the active agent and the ferro-manganese symbiotic lean ore with the ferric content and the manganese content of being less than 20wt%, burdening and uniformly mixing according to calculated quantity of complete reaction, heating and carrying out reduction reaction to obtain magnetic Fe3O4, Fe0 and acid soluble MnO, carrying out magnetic separation to obtain iron ore concentrate with the ferric content of being more than 60wt% and manganese enriched tailings, and leaching the manganese enriched tailings with sulfuric acid or hydrochloric acid, purifying, concentrating and crystallizing to directly prepare manganese sulfate, or tetrahydrate manganese chloride or anhydrous manganese chloride product; and transforming to prepare manganese chemical products such as manganese carbonate, manganese dioxide and manganese monoxide. The method provided by the invention has the advantages of simple and feasible process, low cost and high recovery rate, and the problem of resource utilization of refractory ferro-manganese symbiotic lean ore can be better solved.

The invention belongs to the field of colored glass, and particularly relates to a purple red colorant for low-temperature colored glass and a preparation method and a using method thereof. The purplered colorant comprises the following raw materials in parts by mass: 30-50 parts of quartz powder, 10-30 parts of borax, 10-25 parts of sodium carbonate and 10-30 parts of a coloring additive, wherein the coloring additive is one or a mixture of several of manganese monoxide, manganese dioxide, manganese trioxide and potassium permanganate. The purple red colorant is prepared by mixing the materials, melting at high temperature, performing water quenching, drying, and crushing. Through use of a large amount of silicon oxide, the borax and the sodium carbonate with low melting points in a colorant base material, the diffusion rate of a colorant in 1200 DEG C glass liquid is greatly increased, so that a uniform colored glass stock solution is formed; in a preparation technology of the colorant, composite powder is directly added into a high-temperature frit furnace for melting, and the reaction temperature is instantly raised from room temperature to 1350-1500 DEG C, so that decomposition, volatilization and composition segregation of the materials in a slow heating process are prevented, and a colorant product with a high stoichiometric ratio and high high-temperature diffusion rate is obtained.

The invention relates to a modified additive for recycling copper and iron in depleted slag of an electric copper smelting furnace and an application thereof. The modified additive comprises, by mass, 40-50% of quick lime, 10-15% of manganese monoxide, 10-15% of pyrite, 5-15% of copper pyrite and 10-20% of iron oxides. According to the application of the modified additive for recycling copper and iron in depleted slag of the electric copper smelting furnace, the amount of the added modified additive is 8-20% of the mass of the copper slag. By means of the modified additive, mineral phase reconstruction of iron and copper target minerals is realized by making full use of high-temperature latent heat of depleted slag of the electric copper smelting furnace. The modified additive has the functions of fayalite modification, induced crystallization of initial crystal seeds and stabilization of copper matte minerals. Copper concentrates for copper smelting and magnetite concentrates for iron smelting can be produced by using modified slag through a floatation-magnetic separation process. Accordingly, efficient separation and recycling of iron and copper in depleted slag of the electric copper smelting furnace are realized, resources are saved, and energy consumption is reduced.

The invention belongs to the technical field of magnetic materials and preparation thereof. The invention discloses a manganese-zinc ferrite with high BS, high ZN and excellent ultra-wide-band characteristic and a preparation method thereof. The manganese-zinc ferrite comprises a main material and an auxiliary material, wherein the main material is prepared from iron sesquioxide, zinc oxide and manganese monoxide; the auxiliary material is prepared from calcium oxide, bismuth oxide, molybdenum oxide, niobium pentoxide and cobalt sesquioxide; the preparation method comprises the steps of preparing materials, mixing the main material and the auxiliary material, pre-burning the main material, adding the auxiliary material, performing secondary ball milling, performing granulation molding and sintering. The prepared manganese-zinc ferrite has the characteristics of high Curie temperature, high saturation flux density, high impedance performance and excellent ultra-wide-band characteristic, the permeability at 300kHz is 9,000 or more, the permeability within 300kHz does not attenuate basically, an excellent wide-band characteristic is achieved, and the advantages of the material are further improved.

The invention provides a manganese sulfate production system based on manganese oxide ore. The manganese sulfate production system comprises an ore blending module which is used for automatically feeding manganese oxide ore powder and reducing coal respectively and effectively and uniformly mixing to obtain a reaction raw material; a reduction module which is used for introducing carbon monoxide gas into the reaction raw materials under temperature safety monitoring to carry out reduction curing until divalent manganese in the reaction raw materials is reduced into monovalent manganese so as to obtain manganese monoxide clinker, a mixing module which is used for adding a sulfuric acid solution into the manganese monoxide clinker to carry out a mixing reaction so as to further obtain a mixed solution, and a purification module which is used for adding barium sulfide and sodium hydrosulfide into the mixed solution and carrying out cyclic repeated stirring and filtering to obtain a corresponding purified solution. According to the invention, the production efficiency of manganese sulfate is further effectively improved by assisting the process steps in the manganese sulfate production system based on an intelligent detection technology.