25 results about "Rhodochrosite" patented technology

The invention discloses a sulfur-manganese composite autotrophic denitrification filler as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and polluted water treatment. The sulfur-manganese composite autotrophic denitrification filler contains manganese salt, a sulfur-based component and a cement-based component, the manganese salt comprises one or more of manganese carbonate, calcium manganese ore and rhodochrosite; the sulfur-based component comprises sulfur and sulfur manganese ore; the cement-based component comprises cement, fly ash pottery sand, silica fume, blast furnace slag and metakaolin; the cement comprises one or more of Portland cement, iron aluminate cement and sulphoaluminate cement. The nitrogen removal efficiency of the sulfur-manganese composite autotrophic denitrification filler is superior to that of a sulfur autotrophic denitrification system, the sulfate concentration and nitrite nitrogen accumulation in effluent are remarkably reduced, the service life of the filler is prolonged, and the efficient utilization rate of the material is improved.

The invention discloses a method for efficiently removing impurities and purifying high-calcium and high-magnesium rhodochrosite, and belongs to the technical field of mineral processing. According to the method, calcium and magnesium impurities are removed through X-ray intelligent separation and magnetic separation, then rhodochrosite is converted into manganese chloride through a chloridized ore phase conversion technology, and then the manganese chloride is placed in deionized water to be leached; by adding a manganese sulfate solution, calcium ions are promoted to form precipitates, and calcium impurities in the solution are removed; and meanwhile, an ammonium fluoride solution is added, magnesium ion impurities are further removed, a precipitator is added into the obtained manganese chloride leaching solution, and after the reaction, high-purity rhodochrosite is obtained through precipitation, washing and drying. According to the method, efficient deep impurity removal and purification of the high-calcium and high-magnesium rhodochrosite are achieved, efficient cyclic utilization of resources is achieved, the overall cost of the process and the environmental influence are reduced, the method is suitable for large-scale continuous production, and industrial popularization is convenient to achieve.

The present application relates to the technical field of rhombohedral manganese ore leaching, and particularly discloses a rhombohedral manganese ore dressing and smelting combined efficient leaching process, which comprises the following steps: 1. low-acid leaching: rhombohedral manganese ore powder is added into low-acid anolyte for stirring leaching, the acid concentration of the anolyte is 42-46 g / L, 8-10 cubic meters of low-acid anolyte is used for each ton of rhombohedral manganese ore powder, after the leaching is completed, the end point pH value is controlled to be 6.0-6.5 by adding a neutralizing agent, and the leaching slurry is concentrated by a thickener to separate supernatant and concentrated ore slurry. The present application can efficiently realize rhombohedral manganese ore leaching and is suitable for promotion.

The invention discloses a method for extracting manganese from low-grade rhodochrosite, which comprises the following steps: drying, crushing and screening the low-grade rhodochrosite, uniformly mixing with a flux, heating to 165 DEG C in a tubular furnace under the protection of inert gas, roasting at constant temperature, heating to 245 DEG C, roasting at constant temperature, then heating to 620 DEG C, roasting at constant temperature, and naturally cooling to room temperature after roasting, and adding deionized water, leaching manganese sulfate from the roasted sample at room temperature, filtering and separating, carrying out graded purification and impurity removal on the filtrate, adding ammonium bicarbonate to convert the manganese sulfate into manganese carbonate, filtering, washing with deionized water, and carrying out high-temperature calcination to obtain the manganous-manganic oxide. According to the method, a pyrogenic process flux is utilized to form a reducing atmosphere under the protection of inert gas, a manganese source in the low-grade rhodochrosite is fully utilized, high-valence manganese in the low-grade rhodochrosite is reduced into + 2-valence low-valence manganese, the low-valence manganese is utilized to carry out sulfation reaction, and formed soluble MnSO4 is soaked in deionized water, so that manganese is efficiently extracted from the low-grade rhodochrosite.

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 invention relates to the technical field of liquid fertilizers, and discloses a multi-element organic acid ore liquid fertilizer and a preparation method thereof.The multi-element organic acid ore liquid fertilizer is prepared from, by weight, 5-7 parts of wood vinegar, 0.5-2 parts of magnesite and 0.5-2 parts of smithsonite, the additive comprises the following components in parts by weight: 0.5-1 part of rhodochrosite, 0.5-1 part of calcium molybdate ore, 0.5-2 parts of boracite, 0-1 part of chalcopyrite, 0-1 part of siderite and a chelating agent. Medium and trace elements in the mineral powder are dissolved out through the organic acid wood vinegar, the water-soluble fertilizer is directly prepared, the cost is low, the energy consumption is low, implementation is convenient, the requirement for the grade of the mineral powder is low, even the more non-heavy metal impurities are, the higher the cost performance of the technology is, meanwhile, the byproduct wood vinegar obtained by cracking biochar through straw and other waste is well utilized, and the environment-friendly effect is achieved. According to the process, the acidity of the pyroligneous liquor is neutralized by the mineral powder, the use safety of the pyroligneous liquor is improved, and the process is also very friendly to plants, soil and environment.

The invention discloses a technology for preliminary tailing discarding of rhodochrosite, ore phase conversion and magnetic separation deep impurity removal, and belongs to the technical field of mineral processing. According to the method, ore with high calcium and magnesium content is removed in advance through an X-ray separation technology, then powder preparation and first-stage magnetic separation are carried out, the obtained first-stage magnetic separation manganese concentrate is fed into a suspension roaster, is in a suspension flow state in a nitrogen atmosphere and is subjected to a decomposition reaction to generate faux manganese ore (MnO) with the magnetism higher than that of rhodochrosite (MnCO3), and the faux manganese ore (MnO) is obtained. MnO with relatively high magnetism and non-magnetic calcium and magnesium impurities are more effectively separated through two-stage magnetic separation, and the grade of manganese concentrate is improved. According to the method, high-calcium and high-magnesium rhodochrosite is efficiently and comprehensively utilized, the technological process is simple, the heat and mass transfer efficiency is high, the reaction effect is good, the production continuity is good, the manganese grade and the manganese recovery rate in the product are high, and the calcium and magnesium removal effect is remarkable.

The method for preparing the manganese phosphate from the rhodochrosite comprises the following steps that raw materials are pretreated, specifically, the rhodochrosite is crushed and leached with acid, and leachate containing Mn < 2 + > is obtained; impurity removal: removing impurities from the leaching solution to obtain an impurity-removed leaching solution containing Mn < 2 + >; directional crystallization: adding a crystal form guiding agent into the impurity-removed leachate containing Mn < 2 + > to obtain a precursor; calcining: calcining the precursor to obtain the manganese phosphate, the crystal form directing agent comprises ammonium dihydrogen phosphate and sodium citrate. According to the method for preparing the manganese phosphate from the rhodochrosite, the crystal morphology can be controlled in the process for preparing the manganese phosphate from the rhodochrosite, so that the high-density and high-purity battery-grade manganese phosphate meeting the requirements of a lithium ion battery material is prepared.

A method for pre-tailings removal and flotation-based deep purification of high-calcium-magnesium rhodochrosite belongs to the field of mineral processing technology. This invention utilizes X-ray intelligent separation technology to pre-remove ores with high calcium and magnesium content. The pre-selected ore is then finely crushed and ground, followed by the removal of non-magnetic substances using a magnetic field to obtain a magnetic concentrate. The magnetic concentrate is then subjected to rough reverse reverse flotation and fine reverse reverse flotation. By adjusting the pH value of the pulp during the reverse flotation process and using different collectors, the content of calcium and magnesium impurities is further removed, improving the purity of the concentrate. This invention, through multi-stage separation and flotation processes, successfully removes calcium and magnesium impurities, improves the grade and recovery rate of manganese concentrate, and provides high-quality raw materials for subsequent leaching operations.

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 application discloses a method for preparing metal manganese by two-stage pre-purification-liquid preparation electrolysis coordination from high-calcium high-magnesium low-grade rhodochrosite, and belongs to the field of mineral processing. The method comprises the following steps: crushing rhodochrosite to obtain rhodochrosite particles; conveying the rhodochrosite particles to a sorting machine through a conveying belt to perform pre-selection to obtain pre-selected concentrate; performing grinding on the pre-selected concentrate to obtain a grinding product; preparing the grinding product into a slurry to perform strong magnetic separation to obtain magnetic separation concentrate; performing one-stage reverse flotation-two-stage positive flotation on the magnetic separation concentrate after slurry preparation to obtain flotation concentrate; performing water washing and slurry treatment on the flotation concentrate; reacting the slurry after slurry treatment with sulfuric acid; subsequently, performing filter pressing on the combined slurry, and performing purification, standing and storage treatment on the obtained filtrate to obtain electrolyte meeting electrolysis requirements; performing electrolysis on the electrolyte, and subsequently performing passivation, rinsing, drying and stripping treatment in sequence to finally obtain electrolytic metal manganese products with a purity higher than 99.70%.

The present application relates to a kind of ammonium sulfate residue in electrolytic manganese residue and rhodochrosite collaborative mineral phase conversion system and method, belong to metallurgical beneficiation field.The ammonium sulfate residue in electrolytic manganese residue and rhodochrosite collaborative mineral phase conversion system of the present application includes feed bin, venturi dryer, first cyclone separator, second cyclone separator, suspension mixing bin, third cyclone separator, first flow seal valve, suspension mineral phase collaborative conversion furnace, fourth cyclone separator, second flow seal valve, first cooling cyclone, second cooling cyclone, third cooling cyclone, ball mill, spiral classifier, water immersion tank, first filter press, acid leaching tank, second filter press, noble liquid collector, filter residue collector;The present application adopts suspension roasting ammonium sulfate residue and rhodochrosite powder sulfur-fixing ammonium removal process roasting, sulfur-fixing, ammonium removal efficiency is high, production continuity is good, with low leaching acid consumption, environmental protection effect is good, meet the national green environmental protection requirement, be suitable for large-scale industrial production and the like advantages.

The invention discloses a method for preparing high-purity manganese sulfate from low-grade rhodochrosite based on acetic acid and oxalic acid circulation. The method comprises the following steps: by taking low-grade rhodochrosite as a raw material, adding an acetic acid solution after pretreatment, 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 manganese slag; and then oxalic acid is added into the manganese acetate mother liquor to generate manganese oxalate precipitates, and the acetic acid solution after acetic acid regeneration and solid-liquid separation is circularly used for manganese mineral powder leaching. Dissolving the manganese oxalate precipitate in a sulfuric acid solution, synchronously cooling to obtain a manganese sulfate solution and oxalic acid crystals, and recycling oxalic acid for acetic acid regeneration after solid-liquid separation. Manganese acetate is used as a first manganese extraction intermediate, direct contact between sulfuric acid and the manganese slag can be avoided, the manganese slag is prevented from containing sulfur, and follow-up resource utilization of the manganese slag is facilitated; and manganese oxalate is used as a second intermediate for manganese extraction, so that acetic acid can be regenerated for cyclic utilization, manganese can be separated from most of heavy metal impurities, and a high-purity manganese product can be easily obtained.

The application discloses a method for extracting manganese from low-grade rhodochrosite, and the manganese is extracted according to the following method: after low-grade rhodochrosite is dried, crushed and screened, the low-grade rhodochrosite is uniformly mixed with a flux, heated to 165 DEG C under the protection of an inert gas in a tube furnace, baked at constant temperature, heated to 245 DEG C, baked at constant temperature, then heated to 620 DEG C, baked at constant temperature, naturally cooled to room temperature after baking is completed, deionized water is added to leach manganese sulfate from the baked sample at room temperature, filtration separation is conducted, after the filtrate is purified and impurities are removed in stages, ammonium bicarbonate is added to convert the manganese sulfate into manganese carbonate, the manganese carbonate is filtered and washed with deionized water, high-temperature calcination is conducted, and three-manganese tetroxide is obtained. The method utilizes a reducing atmosphere formed by a pyroprocess flux under the protection of an inert gas, fully utilizes manganese sources in low-grade rhodochrosite, reduces high-valence manganese in the low-grade rhodochrosite into low-valence manganese (+2), utilizes the low-valence manganese to carry out a sulfation reaction, and realizes efficient extraction of manganese from the low-grade rhodochrosite by leaching of formed soluble MnSO4 through deionized water.

The invention belongs to the technical field of resource recovery, and particularly relates to a method for preparing a lithium ferric manganese phosphate precursor by recycling a waste phosphate positive electrode material as well as a product and application thereof. The method comprises the following steps: S1, dispersing waste phosphate positive electrode material powder in a phosphoric acid solution for reaction, and filtering after the reaction is finished to obtain filter residue 1 and filtrate 1; s2, adding a metal source into the filtrate 1 for reaction, continuously heating, and filtering after the reaction is finished to obtain filter residues 2 and filtrate 2; and S3, drying the filter cake to obtain the rhodochrosite type ferric manganese phosphate precursor. The method for preparing the ferric manganese phosphate precursor by regenerating the waste phosphate positive electrode material is more environment-friendly, more elements are recycled, and the comprehensive utilization rate of the elements is high.

The present invention provides a method and apparatus for producing manganese from a manganese ore without using any carbon or a carbon-containing reductant. The manganese ore may be a primary ore comprising rhodochrosite and / or a secondary ore in which manganese is present as at least one of the mineral and mineraloid forms of manganese oxide and manganese oxyhydroxide, for example. The method (500a) comprises comminuting (501) the manganese ore into fines and converting a manganiferous mineral in the ore into a trivalent manganese oxide using at least one of a reductant-free pyrometallurgical technique (502) and an inorganic hydrometallurgical technique (503). The trivalent manganese oxide is then added (505) to an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and the trivalent manganese oxide, to produce a solid phase comprising both elemental manganese and other insoluble products at least comprising sodium oxide. This redox reaction is conducted in an inert atmosphere and its temperature is controlled to remain below about 600 °Celsius to inhibit the production of ternary oxides like α- NaMnO2. The method then comprises separating (506) at least some of the solid phase from the liquid sodium, and separating (507) the elemental manganese from the other insoluble products, which may be done, for example, based on their different densities. The phase separation (506) and the separation (507) of the elemental manganese from the other insoluble products may be carried out in any order. Thus manganese can be extracted from its ores without producing any greenhouse gases, and sodium oxide, or sodium hydroxide derived from hydrating this sodium oxide, can be produced as a co-product. If this sodium oxide and / or hydroxide, which has a high affinity for carbon dioxide, is then used to mineralize captured carbon dioxide, the invention can have a negative carbon footprint overall. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), a subassembly for converting the manganiferous mineral in the ore into a trivalent manganese oxide, a gas-tight reaction vessel for reacting the trivalent manganese oxide with the liquid sodium, a solid-liquid sodium phase separator for removing excess liquid sodium, and a solid-species separator for separating the elemental manganese from the other insoluble products.

The present invention proposes a method for extracting silver from refractory silver-bearing rhodochrosite ore, comprising the following steps: crushing and finely grinding the silver-bearing rhodochrosite ore, followed by mineral phase reconstitution with an acid and a chloride additive to obtain slurry 1; subjecting slurry 1 to solid-liquid separation to obtain a filtrate and a residue; subjecting the residue to a leaching reaction with a lixiviant to obtain slurry 2; subjecting slurry 2 to solid-liquid separation to obtain a silver-containing leachate and a leaching residue; and adding a reducing agent to the silver-containing leachate to carry out a displacement reaction to obtain a silver concentrate containing metallic silver. The present invention utilizes mineral phase reconstitution to disrupt the crystal structure of the iron-manganese carbonate mineral, exposing the encapsulated silver, increasing the contact area with the lixiviant, promoting ion diffusion, and ultimately achieving efficient silver leaching, significantly improving the silver leaching rate.

The application discloses a method for efficiently removing impurities and purifying high-calcium and high-magnesium rhodochrosite, and belongs to the technical field of mineral processing. The method comprises the following steps: removing calcium and magnesium impurities by X-ray intelligent sorting and magnetic separation; then, converting the rhodochrosite into chlorinated manganese by a chlorination mineral phase conversion process, and then placing the chlorinated manganese in deionized water for leaching; adding manganese sulfate solution to promote the formation of calcium ion precipitation and remove calcium impurities in the solution; meanwhile, adding ammonium fluoride solution to further remove magnesium ion impurities; adding a precipitant to the obtained leaching solution of the chlorinated manganese, and after reaction, performing precipitation, washing and drying to obtain high-purity rhodochrosite. The method realizes efficient and deep removal of impurities and purification of high-calcium and high-magnesium rhodochrosite, realizes efficient recycling of resources, reduces the overall cost and environmental impact of the process, is suitable for large-scale continuous production, and is convenient for industrialization and popularization.

The present invention provides a method and apparatus for producing manganese from a manganese ore without using any carbon or a carbon-containing reductant. The manganese ore may be a primary ore comprising rhodochrosite and / or a secondary ore in which manganese is present as at least one of the mineral and mineraloid forms of manganese oxide and manganese oxyhydroxide, for example. The method (500a) comprises comminuting (501) the manganese ore into fines and converting a manganiferous mineral in the ore into a trivalent manganese oxide using at least one of a reductant-free pyrometallurgical technique (502) and an inorganic hydrometallurgical technique (503). The trivalent manganese oxide is then added (505) to an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and the trivalent manganese oxide, to produce a solid phase comprising both elemental manganese and other insoluble products at least comprising sodium oxide. This redox reaction is conducted in an inert atmosphere and its temperature is controlled to remain below about 600 °Celsius to inhibit the production of ternary oxides like α- NaMnO2. The method then comprises separating (506) at least some of the solid phase from the liquid sodium, and separating (507) the elemental manganese from the other insoluble products, which may be done, for example, based on their different densities. The phase separation (506) and the separation (507) of the elemental manganese from the other insoluble products may be carried out in any order. Thus manganese can be extracted from its ores without producing any greenhouse gases, and sodium oxide, or sodium hydroxide derived from hydrating this sodium oxide, can be produced as a co-product. If this sodium oxide and / or hydroxide, which has a high affinity for carbon dioxide, is then used to mineralize captured carbon dioxide, the invention can have a negative carbon footprint overall. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), a subassembly for converting the manganiferous mineral in the ore into a trivalent manganese oxide, a gas-tight reaction vessel for reacting the trivalent manganese oxide with the liquid sodium, a solid-liquid sodium phase separator for removing excess liquid sodium, and a solid-species separator for separating the elemental manganese from the other insoluble products.

The invention discloses a method for cyclic utilization of decalcified magnesium in preparation of high-purity manganese sulfate from rhodochrosite. The method for cyclic utilization of decalcified magnesium in preparation of high-purity manganese sulfate from rhodochrosite mainly comprises ten procedures of first acid leaching, precipitation, roasting, wet ball-milling leaching, second acid leaching, manganese extraction, manganese back extraction, neutralization, mixing and defluorination. Compared with the prior art, the method for cyclic utilization of decalcified magnesium in preparation of high-purity manganese sulfate from rhodochrosite lays a foundation for preparation of high-purity manganese sulfate, realizes reuse of a no-load organic phase and cyclic utilization of manganese fluoride, reduces generation of waste liquid in the technological process, and realizes sustainable utilization of resources.

The present application relates to the technical field of pyrolusite beneficiation, and particularly relates to a weak magnetic separation-reverse flotation process based on hydrogen-based mineral phase conversion of pyrolusite. In the prior art, the wet reduction process of pyrolusite has the problems of high acid consumption and difficult waste liquid treatment, and the dry reduction process has the problems of easy oxidation of minerals and reduced magnetism in the roasting process. In view of the above problems, the present application first grinds the ore to make most of the ore particles smaller than 38 microns, and then performs hydrogen-based mineral phase conversion suspension roasting, controls the amount of roasting gas, converts the pyrolusite into weakly magnetic and easily acid-soluble rhodochrosite, and makes the quartz lattice transform from alpha SiO2 into beta SiO2. After the gangue minerals are separated by magnetic separation, the magnetic separation concentrate is subjected to flotation to obtain a manganese concentrate. The manganese concentrate has high grade and can be used as a raw material for high-activity leaching and electrolysis of manganese.

The invention belongs to the technical field of nitrogen removal, and particularly relates to a low-temperature sulfur-manganese composite autotrophic denitrification nitrogen removal device and a nitrogen removal method. The low-temperature sulfur-manganese composite autotrophic denitrification nitrogen removal device comprises a main body reactor, a water inlet tank and a constant-temperature water bath kettle, the main body reactor is provided with an inner cavity, and a gravel layer, a sulfur-rhodochrosite layer and a quartz sand layer are sequentially arranged in the inner cavity from bottom to top; four sampling ports are formed in the side wall of the main body reactor from top to bottom, and each sampling port is communicated with the inner cavity; a water outlet of the water inlet tank is connected with a water inlet pump; the water inlet pump is communicated with the inner cavity; one end of the constant-temperature water bath kettle is communicated with the top of the main body reactor through a pipeline, the other end of the constant-temperature water bath kettle is connected with a water bath water inlet pump, and the water bath water inlet pump is communicated with the main body reactor.

This invention discloses a method for preparing manganese phosphate from rhodochrosite and the manganese phosphate itself. The method for preparing manganese phosphate from rhodochrosite includes the following steps: raw material pretreatment: crushing rhodochrosite and leaching it with acid to obtain manganese phosphate containing Mn. 2+ The leachate; impurity removal: removing impurities from the leachate to obtain a solution containing Mn. 2+ Impurity removal leachate; directional crystallization: towards Mn-containing leachate. 2+ A crystal-directing agent is added to the impurity-removing leaching solution to obtain a precursor; calcination: the precursor is calcined to obtain the manganese phosphate; the crystal-directing agent includes ammonium dihydrogen phosphate and sodium citrate. The method for preparing manganese phosphate from rhodochrosite provided by this invention allows for controllable crystal morphology in the process of preparing manganese phosphate from rhodochrosite, thereby obtaining high-density and high-purity battery-grade manganese phosphate that meets the requirements of lithium-ion battery materials.

The invention discloses a method for advanced tailing discarding-flotation deep impurity removal and purification of high-calcium and high-magnesium rhodochrosite, and belongs to the technical field of mineral processing. According to the method, ores with high calcium and magnesium content are removed in advance by utilizing an X-ray intelligent separation technology, the pre-selected ores are subjected to fine crushing and ore grinding, and then non-magnetic substances are thrown out by utilizing a magnetic field, so that magnetic concentrate is obtained. The magnetic concentrate is subjected to rough reverse flotation and fine reverse flotation, the content of calcium and magnesium impurity minerals is further reduced by adjusting the pH value of ore pulp in the reverse flotation process and utilizing different collecting agents, and the purity of the concentrate is improved. Through the multi-stage separation and flotation process, calcium and magnesium impurities are successfully removed, the grade and the recovery rate of the manganese concentrate are improved, and high-quality raw materials are provided for subsequent leaching operation.

The invention relates to the technical field of rhodochrosite leaching, and particularly discloses a beneficiation-metallurgy combined efficient leaching process for rhodochrosite, which comprises the following steps: step 1, low-acid leaching: rhodochrosite powder is added into low-acid anolyte for agitation leaching, the acid concentration of the anolyte is 42-46g / L, each ton of rhodochrosite powder corresponds to 8-10m < 3 > of low-acid anolyte, after the leaching is finished, the concentration of the low-acid anolyte is 1-4g / L, and the concentration of the low-acid anolyte is 2-4g / L; the pH value of the end point is controlled to be 6.0-6.5 by adding a neutralizing agent, the leached slurry is concentrated through a thickener, and supernate and concentrated ore pulp are separated out. The method can efficiently realize rhodochrosite leaching, and is suitable for popularization.