80 results about "Manganite" patented technology

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 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.

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.

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 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 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 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 manganese ore borehole histogram alteration symbol self-adaptive filling method based on geological semantics, and relates to the field of manganese ore geological map drawing, and the method comprises the steps: designing a basic pattern library and a rock pattern library; geological semantics of manganese ore drilling are constructed; establishing an alteration dictionary table through geological semantics; setting alteration symbol replacement rules; according to a rock name in geological semantics, combining with a rock pattern library to obtain the height and width of a single rock pattern; alteration information of rock is extracted, and an alteration information table is constructed in combination with the alteration dictionary table; drawing a rock pattern by combining the height and the width of a single rock pattern through geological semantics; and the rock pattern symbols in the rock patterns are replaced by the alteration pattern symbols through geological semantics in combination with the alteration symbol replacement rule and the alteration information table, the alteration patterns are drawn, and self-adaptive filling of the manganese ore drill hole histogram alteration symbols is completed. According to the technical scheme, the computer is used for mapping, and the working efficiency is high.

The present application belongs to the field of arsenic-containing soil remediation, and particularly relates to a remediation agent for arsenic-containing soil, which comprises steel slag, manganese ore, ferrous source and modified fly ash in a weight ratio of 1-3.5:1-3.5:3-7:1-5; the modified fly ash is a product obtained by subjecting fly ash to iron precipitation, aldehyde amine polycondensation and organic acid modification; and the present application also provides a method for remediation of arsenic-containing soil by using bidens pilosa in combination with the remediation agent. The present application can unexpectedly realize synergy based on the components and proportions of the remediation agent and the combination of bidens pilosa, and can significantly improve the effective arsenic content in soil.

This invention belongs to the field of silver-manganese composite material preparation, and provides an efficient method for preparing silver-manganese composite materials. The method uses crypto-potassium manganese dioxide or α-MnO2 tunnel nanorods as a framework. After controllable reduction to construct defects, silver species are impregnated and anchored using a silver-ammonia complex solution. Following drying and air fixation treatment, silver-loaded defective manganese oxide octahedral molecular sieves are obtained. In the resulting material, silver can be stably distributed at surface defect sites and / or 2×2 tunnel opening sites, forming Ag-O-Mn interfaces. This method balances interfacial reactivity, pore structure stability, and low migration and long-term stability of silver species, solving the problem of simultaneously achieving high activity and structural stability, and has good application value.

The application discloses a method for quickly and effectively treating the accumulation of a blast furnace hearth. The method combines manganese ore furnace washing, large air volume, small ore batch, full coke, concentrated addition of circulating clean coke, and material distribution adjustment, clearly defines the ore batch and load during the furnace washing, adjusts the material distribution, controls the [Si] and [Mn] of the molten iron, the (MnO) in the slag, the physical heat, the binary basicity, the water temperature difference, the air volume usage, the number of air supply tuyeres, the addition amount and addition mode of the manganese ore at different stages, and other operations, so that the accumulation of the hearth can be eliminated and the furnace condition can be restored to the normal level in only 3-10 days.

This invention discloses an iron-manganese ore air flotation roasting magnetization device and its usage method, relating to the field of mineral processing technology. The device includes a feeding unit, a drying and preheating unit, an oxidation furnace, a first gas-solid separator, a reactor, a closed indirect heat exchange unit, and a magnetic separation unit connected in sequence. The outlet of the first gas-solid separator is connected to the inlet of the reactor via a first airlock mechanism. The outlet of the reactor is connected to the inlet of the closed indirect heat exchange unit via a second airlock mechanism. The closed indirect heat exchange unit employs indirect heat exchange. The feeding unit is connected to the inlet of the reactor via a third airlock mechanism. A temperature monitoring unit is installed in the reactor to monitor its internal temperature. A controller is used to control the third airlock mechanism to adjust the temperature inside the reactor based on the temperature measured by the temperature monitoring unit. This device and its usage method avoid the defects caused by secondary oxidation, ensure fluidization and reduction uniformity, and guarantee a stable and controllable reducing atmosphere within the reactor.

The invention relates to the technical field of mineral processing and environmental protection, in particular to a method for preparing iron ore concentrate and manganese concentrate through biomass hydrothermal reduction of manganese ore. According to the method, under the alkaline condition, the ferromanganese ore and the biomass are mixed for a hydrothermal reaction, the biomass generates reducing gas to convert iron minerals in the ferromanganese ore into ferromagnetic minerals, a hydrothermal product is obtained, and then iron concentrate and manganese concentrate are separated out through magnetic separation. According to the method, iron phase conversion is achieved through the one-step hydrothermal reduction method, iron and manganese are efficiently separated in combination with magnetic separation, the separation problem of the low-grade ferromanganese ore is solved, the method has the advantages of being high in iron and manganese recovery rate, high in resource utilization efficiency, clean, capable of saving energy, simple in process, suitable for industrialization and the like, the economic and environment-friendly benefits are remarkable, and a new way is provided for resource utilization of the ferromanganese ore.

This invention belongs to the field of manganese ore flotation, specifically disclosing a novel flotation method for rhodochrosite. The method involves pre-oxidizing the surface of rhodochrosite with an oxidant, followed by flotation using a flotation reagent containing sulfur-nitrogen-hydroxyoxime acid collectors to obtain rhodochrosite concentrate. This invention enhances the surface reactivity of rhodochrosite by oxidizing it, thereby strengthening the interaction between rhodochrosite and sulfur-nitrogen-hydroxyoxime acid collectors, achieving highly efficient flotation separation and enrichment of rhodochrosite. Compared with existing rhodochrosite flotation processes, the oxidation flotation method uses lower collector dosages, exhibits better selectivity, and has promising prospects for industrial application.

The cooling device comprises a cooling structure, the cooling structure comprises a middle plate, a sliding groove, a mounting block and an air blower, the sliding groove is formed in the center of the lower end of the middle plate, the sliding groove is arranged in a cross shape, the mounting block is arranged in an annular shape, and the upper end of the mounting block slides in the sliding groove; the lower end of the mounting block is in threaded fastening with the upper end of the air blower; the movable guiding structure comprises universal wheels, a guiding frame, a guiding groove, a supporting column and a guiding block, the four universal wheels are symmetrically distributed below the middle plate in two groups, the guiding frame is arranged on the outer surface of the storage tank in a sleeving mode, the guiding groove is formed in the middle of the guiding frame, one end of the guiding block is fixed to the supporting column, and the other end of the guiding block slides in the guiding groove. The air blower can be quickly positioned, the position of the whole device can be quickly rectified without affecting the position deviation of the air blower so as to be adjusted to a reasonable position, time and labor are saved, convenience and rapidness are achieved, and the operation efficiency can be improved.

This invention discloses a process for roasting manganese ore based on a sintering machine. The process includes the following steps: S1, crushing and sorting the manganese ore; S2, conveying the manganese ore lumps to the bottom and edge material hopper of the bottom and edge material laying device; S3, feeding the sintering machine; S4, roasting: 1) drying in the drying section; 2) preheating section temperature of 750-900℃, preheating time of 6-8 min; 3) roasting section temperature of 1000-1200℃, roasting time of 18-22 min; 4) homogenization section temperature of 1000℃, homogenization time of 3-4 min; 5) cooling in the first cooling section for 4-6 min; S5, secondary cooling; S6, the finished manganese ore after secondary cooling enters the screening process. This invention rationally utilizes discarded or obsolete sintering machines to produce manganese ore, improving resource utilization, reducing the cost of manganese ore roasting equipment, saving investment, and achieving the goal of improving quality and increasing production.

The invention provides manganese-rich slag and a smelting method thereof.The method comprises the steps that a carbon-containing raw material, silica and manganese ore are crushed and then mixed, and a smelting raw material is obtained; the smelting raw materials are put into an electric furnace to be heated and smelted for 1-1.2 h, and a smelted melt is obtained; transferring the smelted melt into a first steel ladle, standing for 5 + / -0.5 min, and transferring a liquid slag layer at the upper part into a second steel ladle; the liquid slag layer of the second steel ladle is cast after standing, and first solidified slag is obtained after cooling; the molten iron on the lower layer of the first steel ladle stands till the slag layer on the upper layer is solidified, drossing and cooling are conducted to obtain second solidified slag, and the molten iron on the lower layer is cast to obtain iron alloy; and the first solidification slag and the second solidification slag are combined to obtain a manganese-rich slag product. According to the method, the slag-iron separation purity is further improved through a step-by-step separation method, manganese elements can be reduced to enter an alloy phase in the short-time smelting process, and the recovery rate of the manganese elements in the manganese-rich slag is increased.

This invention relates to the field of red luminescent materials, specifically disclosing a europium-doped sodium manganese mica red luminescent material, its preparation method, and its applications. The general chemical formula of the europium-doped sodium manganese mica red luminescent material is NaMg. a Mn 3‑a AlSi3O 10 F2:xEu 2+ x = 2 mol%–5 mol%, a = 2.4–2.8. This invention uses sodium manganese mica as the luminescent matrix and Eu... 2+ As a sensitizer, some of the Mg atoms in fluorophlogopite are located in octahedral positions. 2+ Mn 2+ Replaced by Mn 2+ It appears in the matrix as an activator; Eu 2+ Doping into the matrix, in Eu 2+ →Mn 2+ Under the action of energy transfer, Mn 2+ The red light emission is greatly enhanced; through Na + interlayer cations K in manganese mica + By exchanging and regulating the lattice of the mica matrix, europium-doped sodium manganese mica red luminescent material has great application potential in the field of LEDs for plant growth.

The invention provides a seamless submerged arc welding wire, a welding flux and a preparation method of the seamless submerged arc welding wire. The seamless submerged arc welding wire comprises a steel belt and a flux core filled in the steel belt, a copper plating layer is arranged on the surface of the seamless submerged arc welding wire, and the flux core comprises, by weight, 75-82 parts of iron powder, 1.8-2.5 parts of chromium metal, 5-7 parts of nickel powder, 2.5-4 parts of ferromolybdenum, 4-7 parts of manganese metal, 0.3-0.6 part of graphite, 0.5-1 part of rare earth fluoride, 0.5-1 part of Teflon and 0.5-1.5 parts of marble. The flux comprises the following components in parts by weight: 10 to 13 parts of bauxite, 38 to 43 parts of manganese ore, 18 to 21 parts of calcium aluminate, 8 to 11 parts of fluorite and 12 to 15 parts of magnesia. The welding wire and the welding flux are used in a combined mode, and the welding wire has the advantages of being good in welding manufacturability, excellent in mechanical property, ultralow in diffusible hydrogen, low in deposited metal oxygen content and good in horizontal position welding technological property.

The invention belongs to the technical field of reclaimed water purification methods, and particularly relates to an artificial wetland reclaimed water organic matter removal method based on manganese ore sand modification, which comprises the following steps: step 1, carrying out preliminary modification on a manganese ore sand filler in an artificial wetland reactor through a Mn < 2 + > solution; step 2, carrying out further modification on the manganese ore sand filler in the constructed wetland reactor through a potassium permanganate solution; step 3, enabling the concentration of Mn < 2 + > in the constructed wetland reactor to reach a set standard through backwashing; and step 4, starting to operate the constructed wetland reactor to purify the reclaimed water. The surface of the modified manganese ore adsorbs negatively charged organic matters such as humus under the action of electrostatic attraction, and oxygen deficiency active sites catalyze water molecules to generate active oxygen and degrade the organic matters, so that the specific surface area and adsorption sites of the manganese ore can be greatly increased, and the oxygen deficiency catalytic oxidation reduction activity of the surface of the manganese ore can be enhanced; the catalytic degradation efficiency of the material on organic matters is promoted.

This invention relates to a high-capacity, high-conductivity iron-manganese oxide powder, its preparation method, and its applications. The preparation method comprises the following steps: uniformly mixing MnFe-PBA powder via co-precipitation; ultrasonically dispersing the MnFe-PBA powder in a deionized water-ethanol mixed solution to form uniform MnFe-PBA particles; coating the surface of the MnFe-PBA particles with a layer of hydroquinone-formaldehyde resin via aldol condensation to obtain MnFe-PBA@RF particles; and finally calcining the MnFe-PBA particles at high temperature under an inert atmosphere to obtain Mn2FeO3@C powder. This preparation method allows for large-scale synthesis, and the obtained Mn2FeO3@C powder exhibits high specific capacity and high conductivity when used as a cathode in aqueous zinc-ion batteries.

This application provides a method for preparing electrolytic manganese dioxide and the electrolytic manganese dioxide itself, belonging to the field of battery materials technology. The method for preparing electrolytic manganese dioxide includes the following steps: reacting low-grade manganese oxide ore with a sulfur-containing reducing agent and acid, followed by iron removal filtration to obtain a manganese sulfate solution; adding a heavy metal removal agent and a silicate oxygen carrier to the manganese sulfate solution for primary impurity removal; adjusting the pH of the solution after primary impurity removal to an acidic range, adding a molybdenum removal agent for deep impurity removal to obtain a fine filtrate; supplementing the fine filtrate with a silicate oxygen carrier to form an electrolyte; and electrolyzing the electrolyte containing the oxygen carrier to generate electrolytic manganese dioxide. This invention, by using a silicate oxygen carrier prepared through a specific process and employing a staged addition method, can effectively remove impurities from the solution, improving the quality and performance of electrolytic manganese dioxide.

The application provides a process for smelting manganese-rich slag from magnetized roasted manganese ore, and belongs to the technical field of manganese-rich slag production. The process comprises a preheater, a rotary kiln, a cooler and a blast furnace smelting process. After the manganese ore is magnetized and roasted in the rotary kiln, the cooled and magnetically separated and proportioned material is sent into the blast furnace for smelting, fire enrichment, separation and extraction to produce the manganese-rich slag. The application changes the production process, and performs hot melting roasting on low-grade polymetallic symbiotic and associated difficult-to-select primary lean manganese ore to produce the manganese-rich slag through fire enrichment, separation and extraction.

The invention discloses a process for recovering middlings and tailings from low-grade manganese mines, belonging to the technical field of manganese ore recovery. The raw ore is crushed and then screened and graded. The -15mm particle size is sent to a wet high-intensity magnetic separator for sorting, the +15-25mm particle size is sent to a dry high-intensity magnetic separator for sorting, the +25mm particle size is sent to a cone crusher for intermediate crushing, and the particles are returned to the screening and classification after crushing. The -15mm particle size is sorted by wet high-intensity magnetic separation to obtain medium-fine concentrate, medium-fine middlings, and the Overflow products include: +15-25mm particle size is separated by dry high-intensity magnetic separation to obtain dry concentrate and dry tailings; medium-fine concentrate and dry concentrate are combined into concentrate, dry tailings are crushed by cone crusher and sent to linear screen for classification; +15mm particle size is returned to the fine cone crusher for fine crushing, and the crushed product is returned to the linear screen; -15mm particle size and medium-fine middling are combined and sent to scavenging wet high-intensity magnetic separator for scavenging to obtain scavenging concentrate, scavenging tailings and scavenging overflow.

The invention provides a method for improving the recovery rate of manganese in the manganese-silicon alloy smelting process, which comprises the following steps: respectively crushing silica, coke, manganese ore and manganese-silicon alloy smelting slag, and mixing to obtain smelting raw materials; a closed electric furnace is filled with smelting raw materials for smelting, and alloy melt is obtained; transferring the alloy melt into a ladle, and carrying out ladle-to-ladle operation; and the manganese-silicon alloy molten iron is poured into a mold for ingot casting, and a manganese-silicon alloy finished product is obtained after cooling. According to the method, the slag is recycled as a raw material, manganese in the slag is recycled, and components such as CaO and MgO in the slag participate in construction of a new slag system. And under the reasonable proportion, an environment which is more beneficial to manganese oxide reduction and slag-metal separation is formed in the furnace, so that the loss of the manganese element caused by insufficient reduction is reduced, and the recovery rate of the manganese element is effectively improved.