14 results about "Rhodochrosite" patented technology

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.

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 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 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 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.

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 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.