142 results about "Manganite" patented technology

According to the efficient smelting method and device for the silicon-manganese alloy, the manganese ore and the silica are crushed into proper particle sizes, the contact area between the raw materials is increased, the reaction speed is increased, the raw materials are fully reacted in the furnace, the proportion of the raw materials is adjusted, the reaction is more sufficient, and the qualified rate of products is increased; during smelting, a high-precision sensor is used for monitoring parameters such as temperature, pressure, current and voltage in the furnace in real time, a distributed control system is used for automatically adjusting smelting process variables such as electrode lifting, power supply power and raw material feeding speed according to the parameters monitored in real time, and it is ensured that reaction in the furnace is conducted in the optimal state; smelting hot air is filtered through the filter box and then discharged into the mixing box through the centrifugal suction pump, raw materials are scooped up and fall down while mechanical mixing is conducted, the sufficient mixing and preheating effect is guaranteed in cooperation with hot air introduction, and finally the effects of improving the heat source utilization rate, sufficiently mixing and preheating and efficiently smelting are achieved.

The invention discloses a manganese ore deposit exploration effect evaluation method and system based on a spread spectrum induced polarization method, and relates to the technical field of deposit exploration. The method comprises the following steps: constructing a three-dimensional geologic model of a mining area, initially arranging an exploration unit and acquiring actual exploration data, inverting the actual exploration data to generate an initial geologic profile map, performing exploration simulation in the three-dimensional geologic model and acquiring simulated exploration data, acquiring a distortion index and a spatial influence degree of the actual exploration data and constructing an exploration correction model; the exploration unit is reset, corrected exploration data are obtained, and inversion is carried out on the corrected exploration data to generate a corrected geological profile map; the effectiveness of various data obtained in the ore deposit exploration process can be improved, the distribution condition of an ore deposit can be better reflected, and then the accuracy of ore deposit exploration is enhanced.

The invention discloses a method for preparing a manganese sulfate crystal by using manganese carbonate ore. The preparation method of the manganese sulfate crystal comprises the following steps: leaching manganese carbonate ore by using sulfuric acid to obtain a leaching solution, precipitating the leaching solution by using a heavy removing agent to remove heavy metal ions, neutralizing redundant sulfuric acid in the leaching solution, introducing a precipitating agent, reacting with the precipitating agent to obtain a precipitate, washing the precipitate with water to remove impurities, and dissolving by using sulfuric acid to obtain the manganese sulfate crystal. And after dissolving, precipitating a small amount of residual calcium and magnesium ions by using fluoride, filtering to obtain fluorine-containing manganese sulfate filtrate, finally adding a fluorine removal agent for solid-liquid separation, and evaporating and crystallizing the filtrate to obtain manganese sulfate crystals. The manganese sulfate crystal is suitable for production of a lithium ion battery positive electrode material. According to the preparation method of the manganese sulfate crystal, the impurity removal cost is greatly reduced. The invention also discloses a method for preparing manganous-manganic oxide from manganese carbonate ore. The tap density of the manganous-manganic oxide is greater than 2.3 g / cm < 3 >, the specific surface area is less than 3m < 2 > / g, and the requirement of a battery-grade material is met.

The invention discloses a manganese ore prospecting method, device, equipment and medium, and relates to the field of data processing.The manganese ore prospecting method comprises the steps that a jet flow center area of a target area is determined according to gravity data of the target area and aeromagnetic data subjected to chemical pole anomaly processing; carrying out chemical test analysis on the manganese ore sample in the jet flow central area, and determining the characteristics of the manganese ore in the jet flow central area; performing French group manganese ore special geological mapping on the jet flow center area, and determining geological section information of a first section of the jet flow center area; determining a prospecting prediction area of the first section by combining the manganese ore characteristics and the geological section information; performing inversion on the French group manganese-containing ore layer of the jet flow center area in combination with known drilling data of the prospecting prediction area, and determining a three-dimensional model of the French group manganese-containing ore layer of the jet flow center area; and based on the three-dimensional model, performing audio magnetotelluric sounding on the jet flow center area, and optimizing predicted manganese ore data of each geographic position of the jet flow center area.

A light-absorbing heat-storage composite material comprises a photo-thermal material and a heat-storage material. The heat-storage material comprises at least one of hydroxide, hydrate, molten salt, and organic phase change heat-storage material. The photo-thermal material comprises brown manganese ore silicate, and the photo-thermal material is used to enhance the absorbance and photo-thermal conversion rate of the heat-storage material, and complete the heat storage at the same time. The invention also provides a method for preparing the light-absorbing heat-storage composite material. The prepared photo-thermal composite material is a photo-thermal storage integrated material that can directly convert light energy into thermal energy and store heat, with small heat energy loss, high photo-thermal conversion efficiency, and cost saving.

The utility model discloses a manganese ore leachate purification and separation device, which belongs to the technical field of preparation of hydrometallurgy electrode materials and comprises a purification tank, ultrasonic generators are fixedly mounted on two sides of the purification tank respectively; a stirring mechanism is arranged in the tank body and comprises a stirring shaft and a stirring paddle, the upper end of the stirring shaft is connected with a stirring motor fixed at the top of the purification tank, and the lower end of the stirring shaft is connected with the stirring paddle; a first feeding hole and a second feeding hole are simultaneously formed in the top of the purification tank; a discharging bottom cover of a metal filter screen is arranged at a discharging opening in the bottom of the purification tank, a discharging pipe and a blowback air pipe are connected to the outer portion of the discharging bottom cover, the other end of the discharging pipe is connected to a vacuum transfer pump, and the other end of the blowback air pipe is connected to a compressed air system. According to the utility model, the ultrasonic generator assists in strengthening and promoting the impurity removal reaction and accelerating the generation of particle precipitates, and meanwhile, high-frequency vibration inhibits the crystallization of manganese compounds, so that the device has the application advantages of greenness, high efficiency, low carbon and energy conservation.

The invention discloses a method for improving the manganese leaching rate and a manganese leaching process, and belongs to the technical field of manganese extraction.The method comprises the steps that after the water content of mineral aggregate is adjusted to be 10% or above, microwave pretreatment is conducted; adding an auxiliary agent polyvinylpyrrolidone into the mineral aggregate subjected to microwave treatment; mixing the mineral aggregate added with polyvinylpyrrolidone with water, carrying out wet grinding, and adding ultrasonic treatment in the wet grinding process to obtain ore pulp; concentrated sulfuric acid, water and the obtained ore pulp are mixed for sulfuric acid leaching treatment; and after the sulfuric acid leaching treatment reaction is completed, solid-liquid separation is carried out, and a leaching solution with the high manganese content is obtained. The method can improve the manganese leaching rate of the manganese ore.

The invention belongs to the technical field of drilling, and particularly relates to a manganese ore water-sensitive stratum geological drilling plugging enhancing method which comprises the following steps: step 1, injecting drilling mud containing a plugging material into a drill hole in a drilling process; and 2, vibration or pulse is applied to the slurry through a ground or underground device. According to the method, vibration or pulses are applied in the drilling process, so that pore throats and micro cracks near the well wall generate a periodic opening and closing effect, and a plugging material is continuously driven to enter and is compacted step by step under the action of dynamic pressure and is not limited to the surface layer of the well wall any more, so that the deepness, compactness and anti-scouring capacity of a plugging layer are improved; the safety and continuity of water-sensitive stratum drilling are enhanced, and the method has a good application prospect in the technical field of geological drilling.

The present application discloses a lithium nickel manganate positive electrode material, a preparation method therefor and an application thereof. The lithium nickel manganate positive electrode material has a molecular formula of LiαNiβMn2-βMγO4-δ / N, where 0.95≤α≤1.1, 0.4≤β≤0.6, 0.0005≤γ≤0.02, 0≤δ≤0.2, M is a single-crystal dispersing element, and M is at least one of V, Nb, Ta, Mo or W; N represents a coating layer, and the coating layer includes a P compound and / or an Al compound, and a coating amount of N is 500-10000 ppm. By means of adding a small amount of a single-crystal dispersing element (V, Nb, Ta, Mo or W), a high-voltage nickel manganese material having good dispersity of single crystals is prepared. By means of uniformly coating the P compound and / or the Al compound to the lithium nickel manganate positive electrode material, the direct contact between the positive electrode material and an electrolyte, is avoided.

The invention belongs to the technical field of welding, and particularly relates to a consumable electrode CO2 gas shield flux-cored wire suitable for cryogenic high manganese steel welding, and a flux core accounts for 25-30% of the total weight of the flux-cored wire; the flux core comprises, by weight, 25%-35% of rutile, 30%-34% of electrolytic manganese metal, 1%-5% of potassium sodium titanate, 2%-5% of quartz, 1%-3% of zircon sand, 0-0.5% of manganese ore, 1%-3% of rare earth ferrosilicon alloy, 0.5%-1.5% of rare earth fluoride, 3%-8% of high-carbon ferrochrome, 2%-4% of molybdenum powder, 2%-4% of magnesium-calcium alloy, 3%-7% of aluminum-zirconium alloy, 9%-12% of nickel-magnesium alloy, 0.5%-1.5% of rare earth silicon-calcium alloy and the balance flux. 1-1.5% of bismuth oxide, 0.5-1.5% of graphite and the balance of iron powder. The invention provides the consumable electrode CO2 gas shield flux-cored wire which is good in process and mechanical property, simple in production process and suitable for cryogenic high manganese steel welding.

The present application relates to the technical field of mineral processing, and more particularly to a manganese ore magnetic separation device and dry beneficiation process, wherein the magnetic separation device comprises a mounting frame, a first channel, a second channel, a distribution plate, a magnetic roller, a conveyor belt, a feeding mechanism and an auxiliary mechanism. The magnetic roller is composed of a roller shaft, an end cover and a plurality of magnetic rings, the magnetic rings comprising a magnetic gathering plate and a magnetic block and being tightly arranged by a screw rod. The feeding mechanism realizes uniform feeding through a vibration and suspension system. The auxiliary mechanism realizes the vibration and shunting of the ore sand through a guide strip. The beneficiation process comprises crushing, grinding, classification, roasting, magnetic separation and post-processing. The magnetic separation adopts a two-stage type of roughing and cleaning to improve the recovery rate. The present application has the advantages of high separation efficiency, high concentrate purity, low energy consumption, strong adaptability and the like, and is suitable for large-scale industrial production.

To provide a method and an apparatus for producing carbon-recovering type manganese-based alloys by which the reduction of CO2 discharge is made possible.SOLUTION: A method for producing a carbon-recovering type manganese-based alloy includes a step (A) of charging a manganese ore-derived raw material having a manganese oxidation degree of 1.0 to 1.1 and a carbonaceous material into an electric furnace to perform refining, and then performing slag / metal separation, and a step (B) of producing a synthetic fuel using carbon monoxide contained in a by-product gas generated from the electric furnace as a raw material.SELECTED DRAWING: None

The application discloses a preparation method of vanadium-doped and high-hydrated mangan-chromian spinel monocrystal under high temperature and high pressure. The cylindrical mangan-chromian spinel sample is prepared by taking solid rose triangular rhombic manganese carbonate crystal, solid chromium (III) acetate hydroxide crystalline powder, solid vanadium (IV) acetylacetonate oxide powder, solid oxalic acid powder, solid bixbyite powder, solid chromium hydroxide powder and liquid dilute nitric acid as starting raw materials; two pieces of water source sheets are made from the bixbyite powder and the chromium hydroxide powder with a weight ratio of 4:1; the two pieces of water source sheets are placed at two ends of the cylindrical mangan-chromian spinel sample and then are placed into a double-capsule structure experimental sample bin with an inner layer sleeve being a graphite tube and an outer layer sleeve being a gold-palladium alloy tube; the high temperature and high pressure reaction is carried out to obtain the mangan-chromian spinel monocrystal; and the preparation technology blank of the vanadium-doped and high-hydrated mangan-chromian spinel large-particle monocrystal under the current high temperature and high pressure conditions is solved.

This application belongs to the field of electrolytic manganese preparation technology, specifically providing a method for preparing electrolytic manganese from manganese carbonate ore through dry polishing pre-selection and multi-stage purification, including the following steps: a) crushing and screening the manganese carbonate ore to obtain ore of a first particle size; b) subjecting the ore of the first particle size to dry strong magnetic separation pre-selection and tailings removal to obtain pre-selected concentrate; c) grinding the pre-selected concentrate to obtain a grinding product of a second particle size; d) mixing the grinding product with water or return liquid for slurry treatment to obtain a slurry; e) mixing the slurry with sulfuric acid for chemical leaching to obtain a leaching slurry; f) subjecting the leaching slurry to multi-stage purification treatment to obtain a purified electrolyte; g) electrolyzing the purified electrolyte to obtain cathode electrolytic manganese. The electrolytic manganese obtained by this application has the advantages of high purity, low water load, and low reagent consumption.

The invention relates to the technical field of waste acid resource utilization, and provides a method for producing iron oxide black and manganese carbonate by using iron-containing waste hydrochloric acid, which comprises the following steps: S1, adding ferrous oxide waste mud into ferrous chloride-containing waste hydrochloric acid, and extracting to obtain an organic phase and a water phase; s2, hydrochloric acid and first manganese oxide mineral powder are added into the 70 wt% water phase, and first filtrate and first filter residues are obtained; s3, adding a first alkaline material into the first filtrate to obtain a ferric oxide and manganous chloride solution; s4, mixing ferric oxide with the remaining water phase, and adding a second alkaline material to obtain iron oxide black; s5, manganese dioxide mineral powder and sodium sulfide are added into the manganous chloride solution, and second filtrate and second filter residues are obtained; and S6, adding sodium carbonate into the second filtrate to obtain a manganese carbonate and sodium chloride solution. According to the technical scheme, the problems of low purity and poor resource utilization effect of the iron oxide black obtained from the iron-containing waste hydrochloric acid in related technologies are solved.

This invention relates to the field of ferroalloy smelting technology and discloses a high-carbon ferromanganese and its preparation method, comprising the following steps: raw material pretreatment; converter preheating and bottom material laying: pretreated high-grade manganese ore, lime, and coke powder are mixed and added as bottom material to the CLU converter for preheating; iron addition and initial reduction: high-carbon ferromanganese is added to the converter, and graphite fragments are added, and initial reduction is carried out under a pure argon atmosphere; atmosphere control and second-stage reduction: when the carbon content of the molten iron drops to 5.0-5.8%, the reblowing gas is switched to a mixed gas of argon, CO, and CH4, and the remaining high-grade manganese ore, silicon carbide, ferrosilicon manganese alloy, and supplementary coke powder are added in batches, while adjusting the slag composition; endpoint judgment and iron tapping. The high-carbon ferromanganese of this invention has precise composition and high purity, and the preparation method is characterized by high efficiency, low consumption, greenness, and high manganese recovery rate, enabling the industrial-scale production of high-carbon ferromanganese.

To provide a manufacturing method of very low carbon ferromanganese that makes it possible to reduce CO2 exhaust in manufacture of ferromanganese and its manufacturing apparatus.SOLUTION: A method for producing an extremely low carbon manganese-based alloy, comprises: a step (1) of carbon-reducing manganese ore or reduced manganese ore; a step (2) of performing molten slag-metal separation; and a step (3) of reducing the separated molten slag with a non-carbon reductant to perform refining, followed by slag-metal separation.SELECTED DRAWING: None

The invention belongs to the technical field of alloy materials, and relates to a preparation method of a low-vanadium ferromanganese alloy material. The preparation method provided by the invention comprises the following steps: crushing the calcium-containing vanadium slag, and screening to obtain the calcium-containing vanadium slag with the particle size of 5-120mm and the calcium-containing vanadium slag with the particle size of less than 5mm; the vanadium-containing tailings are screened, and the vanadium-containing tailings with the particle size being smaller than 5 mm are obtained; the calcium-containing vanadium slag with the particle size smaller than 5 mm, the vanadium-containing tailings with the particle size smaller than 5 mm and a binder are mixed and pressed into balls, and spherical particles are obtained; the method comprises the following steps: detecting chemical components in the calcium-containing vanadium slag, the vanadium-containing tailings, the ferrovanadium ore and the manganese ore, calculating the material dosage according to the detection result, and mixing the calcium-containing vanadium slag with the particle size of 5-120mm, the spherical particles, the ferrovanadium ore, the manganese ore, an iron source, a reducing agent and a pH regulator according to the calculation result for smelting to obtain the low-vanadium ferromanganese alloy material. The smelting waste slag is used as a preparation raw material, so that the production cost of the vanadium-containing alloy is reduced while the waste slag is effectively treated.

The invention discloses a method for preparing a manganese-containing oxidizing agent from laterite-nickel ore hydrometallurgy barren liquor and application of the manganese-containing oxidizing agent, and relates to the technical field of laterite-nickel ore hydrometallurgy. The method for preparing the manganese-containing oxidizing agent from the laterite-nickel ore wet smelting barren liquor comprises the steps that S1, the oxidizing agent and a neutralizing agent are added into the laterite-nickel ore wet smelting barren liquor, an oxidation manganese precipitation reaction is carried out, and manganese precipitation ore pulp is obtained; and S2, carrying out solid-liquid separation on the manganese precipitation ore pulp to obtain the manganese-containing oxidizing agent. The laterite-nickel ore hydrometallurgy barren liquor is treated through the method, the precipitation rate of Mn is high, the content of Mn < 2 + > in discharged waste water is reduced, the content of Mn < 4 + > in the oxidizing agent is high, and the oxidizing property is good.

The invention discloses a method for dissolving and purifying a manganese dioxide-containing mineral. The method comprises the following steps: crushing and grading the manganese dioxide mineral for later use; washing the graded material with dilute sulphuric acid, and then centrifugally filtering to obtain filter residues and filtrate; preparing filter residues into a solid solution with water, adding concentrated sulfuric acid and methyl sulfate for primary dissolution, and filtering to obtain lead-containing minerals and filtrate; and after excessive manganese ore is added into the filtrate, MnCO3 and H2O2 are added, manganese ore which is not completely reacted and obtained through filtering is dissolved again, ammonia water is added into the filtrate for impurity removal, and a MnSO4 solution is obtained. According to the method, manganese dioxide-containing minerals are crushed to obtain particles, the particles are prepared into a solid material solution for secondary reduction acid leaching, the contact area of the mineral particles and reducing agents such as methyl sulfate, methanol and hydrogen peroxide is greatly increased, and methyl sulfate is used as the reducing agent, so that the method has the advantages of high reaction rate, high efficiency, safer storage and transportation and the like; the extraction rate of manganese ions is improved, and the extraction time is shortened.

This invention relates to a method for the efficient separation of iron and manganese components in iron-manganese ore. The method involves mixing iron-manganese ore with intermediate products or vanadium products from the vanadium industry to obtain a mixture; roasting the mixture at high temperature to obtain roasted clinker; leaching the roasted clinker and then filtering it to obtain a manganese- and vanadium-containing leachate and an iron-containing leaching residue; adding a vanadium-precipitating additive to the obtained manganese- and vanadium-containing leachate and adjusting the pH value to induce precipitation; filtering after vanadium precipitation to obtain intermediate products or vanadium products from the vanadium industry and a manganese-containing supernatant; precipitating or drying the obtained manganese-containing supernatant to obtain a manganese product and manganese extraction waste liquid. This invention utilizes intermediate products or vanadium products from the vanadium industry to achieve mineral phase reconstruction of manganese minerals in iron-manganese ore. During this process, the intermediate products or vanadium products can be recycled, achieving efficient separation of iron and manganese in iron-manganese ore and efficient recycling of intermediate products or vanadium products from the vanadium industry.

The invention discloses a method for carrying out reduction roasting on ferromanganese ore through peanut shells and carrying out low-intensity magnetic separation to separate iron and manganese, and belongs to the technical field of metallurgy and mineral processing. The method comprises the following steps: mixing peanut shell powder with ferromanganese ore powder, roasting in a protective atmosphere, cooling, and separating out iron ore concentrate and manganese ore concentrate through a low-intensity magnetic separation method. According to the method, reduction of iron and manganese in the ferromanganese ore is achieved through reducing gas generated in the reduction roasting process of the peanut shells, then the magnetic difference between the reduced iron ore and manganese ore is effectively utilized, and the iron ore concentrate and the manganese concentrate are obtained through low-intensity magnetic separation. The iron ore concentrate and the manganese concentrate obtained through the method can be used for the metallurgical industry, meanwhile, resource utilization of the peanut shell solid waste is achieved, and environmental pollution is reduced.

The invention discloses a method for preparing a manganous-manganic oxide (Mn3O4) positive electrode material by using a manganese ore tailing leaching solution and application of the manganous-manganic oxide (Mn3O4) positive electrode material. The manganese ore tailing leaching solution is directly used as a raw material, resource utilization of manganese in the manganese ore tailing leaching solution is achieved through a two-step precipitation method, the manganous-manganic oxide positive electrode material with the high additional value and the high performance is obtained, and meanwhile iron in the leaching solution is separated and enriched. The method is simple and convenient, the yield is high, preparation conditions are easy to control, the method is suitable for large-scale production, and the prepared manganous-manganic oxide electrode material has a special flower-cluster-shaped morphology and more oxygen defects, so that the manganous-manganic oxide electrode material has high reversible specific capacity and better cycling stability and rate capability when being used as an aqueous zinc ion battery positive electrode material.

The present application relates to the technical field of manganese ore granularity detection, and specifically discloses a manganese ore granularity online detection and sorting method based on machine vision, which collects manganese ore two-dimensional color images and three-dimensional depth point cloud sequences, generates particle three-dimensional models through instance segmentation masks, calculates equivalent spherical diameter data sets and particle size frequency histograms, performs Gaussian mixture fitting on the histogram, extracts coarse particle peak positions, fine particle peak positions and valley bottoms, obtains an overlapping area and splits the overlapping area into pure coarse, pure fine and undetermined particle sets, extracts texture and morphological feature cascades, trains a binary classifier using the pure coarse and pure fine sets as pseudo-labels, generates a target state evaluator, inputs the undetermined particle set into the evaluator to obtain confidence probabilities, extracts particles falling into an intermediate uncertain interval and marks the particles as double-attribute transition state particles, divides the probabilities into double-node data objects, calculates a valley bottom mixed index by taking the proportion of the transition state particles, and outputs speed adjustment and sweeping magnetic pole compensation instructions to improve sorting precision and robustness.

The invention discloses a method for preparing manganese sulfate from sulfur-free low-grade rhodochrosite. The method comprises the following steps: by taking low-grade rhodochrosite as a raw material, grinding and pretreating the low-grade rhodochrosite, mixing the low-grade rhodochrosite with water, adding acetic acid, fully stirring, heating and leaching, and carrying out solid-liquid separation after the reaction is finished, so as to obtain a liquid-phase manganese acetate mother solution and solid-phase sulfur-free manganese slag; sulfuric acid is added into the manganese acetate mother liquor, heating and reduced pressure distillation are conducted, acetic acid is vaporized and then condensed and recycled for ore leaching, and manganese sulfate is crystallized and separated out in the heating process to serve as a product. Sulfuric acid is not in direct contact with manganese ore, the manganese slag does not contain sulfur, resource utilization is facilitated, and the treatment cost of the manganese slag can be remarkably reduced; and residual acid in the slag can be neutralized by lime water to stably exist, so that the risk of secondary pollution is avoided. The concentration of the acetic acid is not high, cyclic utilization is achieved in the method, the production cost is reduced through recycling of the acetic acid, the resource utilization rate is further increased, and the method is particularly suitable for the manganese extraction process of low-grade rhodochrosite.

The application relates to a preparation method of a manganese-containing pellet and a blast furnace smelting method, which comprises the following steps: step a, crushing, water-fine grinding and drying treatment are carried out on high-manganese lump ore to obtain high-manganese concentrate; step b, the high-manganese concentrate and bentonite are uniformly mixed according to a preset ratio to obtain a mixture; step c, the mixture is added into a disc pelletizer, and a pellet core is obtained in a water dripping ball forming mode; step d, based on the pellet core, the water content ratio and the balling time added into the disc pelletizer are controlled, so that the residual mixture of the mixture is uniformly wrapped on the outer layer of the pellet core, and a manganese-containing pellet is obtained. The method improves the traditional preparation method of the manganese-containing pellet, improves the quality of the manganese-containing pellet, and obtains the manganese-containing pellet meeting the performance standard of the blast furnace smelting. The blast furnace adding mode is optimized, the utilization efficiency of the manganese ore is improved, the iron loss is reduced, and the smelting of the high-titanium slag is improved.

The invention aims to provide a process for smelting 200-series stainless steel in a VOD (Vacuum Oxygen Decarburization) furnace, which comprises the following steps: adding manganese mineral powder into a steel ladle in advance, then pouring molten stainless steel subjected to primary decarburization in an AOD converter into the steel ladle after slag stopping and tapping, and transporting the steel ladle to a VOD furnace station for vacuum decarburization treatment and reduction treatment after vacuum breaking. The addition amount of the manganese mineral powder is limited by the fact that the thickness of slag in a steel ladle at the initial stage of the vacuum decarburization step is smaller than or equal to 70 mm. The manganese ore is used as one of the manganese alloy sources, the cost is low, the manganese ore powder is firstly added to the bottom of the steel ladle and then poured into the molten steel, the manganese ore powder can be rapidly melted and prevented from escaping, the manganese ore powder is fully utilized in the VOD smelting process, and the yield of the manganese ore powder is increased; in addition, the manganese mineral powder serves as slag and an oxidizing agent in the vacuum decarburization process, the amount of blown oxygen needed by VOD decarburization is reduced, the VOD smelting time is shortened, and the VOD smelting efficiency is improved.

The invention provides submerged arc sintered flux for welding SA-508Gr. 3C1.1 steel in third-generation nuclear power equipment and a preparation method of the submerged arc sintered flux. The submerged arc sintered flux comprises, by weight, 20-40 parts of fluorite, 35-50 parts of magnesia, 15-30 parts of aluminum oxide, 10-20 parts of wollastonite, 1-5 parts of silica powder, 0.5-2 parts of silicon iron, 2-5 parts of manganese ore, 1-5 parts of calcium titanate and 1-5 parts of rare earth materials. And the water glass accounts for 25-30% of the sum of the flux powder. The flux provided by the invention has good welding manufacturability, excellent slag removal, beautiful formation and more excellent mechanical properties.

The present invention relates to a method for efficiently separating iron and manganese components from ferromanganese ore based on step-by-step leaching. The method comprises: mixing the ferromanganese ore with an intermediate product or a vanadium product from the vanadium industry to obtain a mixed material; calcining the mixed material at high temperature to obtain a roasted clinker; subjecting the roasted clinker to primary and secondary leaching to obtain a manganese-containing leachate and a vanadium-containing and iron-containing leach residue; precipitating or drying and crystallizing the obtained manganese-containing leachate, and filtering to obtain a manganese product and a manganese-extracted waste liquid; leaching the vanadium-containing and iron-containing leach residue, controlling the pH of the leaching system with an alkaline solution, and filtering after leaching to obtain a vanadium-containing leachate and an iron-containing leach residue. The method of the present invention achieves efficient separation of iron and manganese from ferromanganese ore, as well as efficient recycling of vanadium-containing intermediate products or vanadium products from the vanadium industry.

The invention provides a refractory ferromanganese ore separation system, and belongs to the technical field of refractory ferromanganese ore separation systems. The invention discloses a refractory ferromanganese ore separation system which comprises a feeding system, a preheating oxidation system, a fluidization synchronous reduction roasting system, a fluidization cooling oxidation system, an ore grinding magnetic separation system and a hot air circulation dust removal system. According to the system, a fluidized roasting technology is adopted to enable reducing gas and a solid material to be in close contact to generate a gas-solid efficient reaction, the material is heated through the preheating oxidation system, the material is heated uniformly, the next reduction reaction is facilitated, and the iron-containing manganese ore phase is accurately converted and generated in the fluidized reduction reaction system and the fluidized cooling oxidation system, so that the iron-containing manganese ore is obtained. And after the reduction reaction is finished, the mineral dissociation degree is increased through ore grinding, and iron and manganese resources are subjected to efficient magnetic separation through a magnetic separation system. The system is environment-friendly, relatively compact in process, relatively high in treatment capacity, relatively high in automation degree and capable of more accurately controlling conversion of an iron phase and a manganese phase.