123 results about "Manganous-manganic oxide" patented technology

The invention provides an in-situ synthesis method and application of aluminum-doped battery grade manganous-manganic oxide and lithium manganate. An aluminum-doped manganous-manganic oxide precursor is synthesized in one step through a direct homogeneous oxidation method, and then the lithium manganate positive electrode material is prepared through a high-temperature solid-phase reaction. The technological parameters such as the volume of a base solution, the concentration of a manganese-containing solution, the concentration of ammonia water, the flow of a salt solution, the stirring speed and the reaction temperature are regulated and controlled, and the synthesized manganous-manganic oxide precursor is uniform in particle size and has relatively high tap density and relatively low specific surface area. The capacity retention ratio of the obtained aluminum-doped lithium manganate reaches 85.16% after the aluminum-doped lithium manganate is circulated for 100 circles at the rate of 0.2 C, and the discharge specific capacity of the aluminum-doped lithium manganate is 105.8 mAh / g at the high rate of 5C. According to the method, the efficient recycling of waste battery resources is realized, the production cost is reduced, and meanwhile, the problem of non-uniformity of a conventional doping process is solved.

The invention relates to the technical field of preparation of manganous-manganic oxide, in particular to a production and preparation process of a manganous-manganic oxide material for batteries, which comprises the following steps: dissolving high-purity manganese sulfate to prepare a manganese sulfate solution, and adding a dispersing agent and a surfactant to obtain a manganese salt solution; the method comprises the following steps: adding a base solution into a reaction kettle, stirring and heating, conveying a manganese salt solution and ammonia water, synchronously introducing oxygen, dividing the whole oxidation reaction process into two stages, controlling the flow velocity of the ammonia water in different stages, and dynamically adjusting the temperature; and carrying out suspension precipitation on manganous-manganic oxide obtained by the oxidation reaction, aging, and carrying out dehydration suction filtration, washing and drying to obtain the manganous-manganic oxide material for the battery. The invention aims to adjust the morphology of the manganous-manganic oxide finished product by controlling reaction conditions, effectively reduce the granularity of the product and enhance the uniformity of particle size distribution.

The invention discloses an iron-doped manganous-manganic oxide material and a preparation method and application thereof.According to the iron-doped manganous-manganic oxide material and the preparation method and application thereof, manganese sulfate serves as a manganese source, DTPA ferric ammonium salt serves as a complexing agent and a doping agent, ammonia water serves as alkali liquor, ethyl alcohol serves as a dispersing agent, and the preparation process is optimized in a targeted mode; the iron-doped manganous-manganic oxide material with uniform particle size distribution is prepared, the doping uniformity of the iron element in large-size micron-sized manganous-manganic oxide particles is improved while the sulfur content in the material is reduced, and the product is good in particle size uniformity and high in tap density. In addition, the process provided by the invention also has the characteristics of simple flow, easiness in operation, low input cost, high economic benefit and large-scale popularization and application.

The invention relates to the field of preparation of battery materials and precursors of the battery materials, and discloses a method for efficiently preparing battery-grade manganous-manganic oxide by using electrolytic manganese residue leachate and a harmless treatment method for tail liquid of the battery-grade manganous-manganic oxide. Treating the manganese residue leachate concentrated water obtained in the previous step with ammonia water and oxygen to prepare battery-grade manganous-manganic oxide; adjusting the pH value of the filtrate obtained in the previous step to prepare magnesium hydroxide; the filtrate obtained in the previous step is subjected to evaporative crystallization, ammonium sulfate is prepared, finally, harmless treatment of preparation of battery-grade manganous-manganic oxide from the manganese residue leachate and the tail liquid of the battery-grade manganous-manganic oxide is achieved, and the recovery efficiency of valuable components is greatly improved.

The invention belongs to the technical field of manganous-manganic oxide production, and particularly discloses low-specific-surface-area manganous-manganic oxide and a preparation method thereof.In the process of preparing manganous-manganic oxide through one-step oxidation, the oxygen introduction rate and the stirring linear speed at different reaction stages are accurately adjusted, so that the specific surface area of manganous-manganic oxide is increased, and the specific surface area of manganous-manganic oxide is increased. Furthermore, accurate cooperative control on crystal nucleation and growth processes is realized, so that a manganous-manganic oxide product with a low specific surface area can be stably obtained, and the requirement of a high-performance battery material on the low specific surface area is met. The method can be suitable for reaction equipment of different scales, and is beneficial for realizing large-scale production of products. In addition, the method is short in process, easy to operate, high in production efficiency and stable and controllable in product quality. And the obtained product is low in specific surface area, moderate in particle size, uniform in morphology and relatively high in tap density. The lithium manganate material adopting the product shows excellent cycle performance, the service life of the battery is remarkably prolonged, and the energy density of the battery is remarkably improved.

The invention relates to a preparation method of manganous-manganic oxide / graphite nano-enzyme for sensitive detection of L-cysteine, a green synthesis strategy is adopted, a mechanochemical method is combined to develop a novel Mn3O4 / graphite composite material which is low in cost, high in activity and easy to synthesize in macroscopic quantity, and the prepared product has relatively high catalytic activity and can be applied to the detection of L-cysteine. Compared with the prior art, the method has the advantages that oxidase-like activity is obviously improved, the Michaelis constant Km is 0.132, the maximum reaction rate Vmax is 0.998 * 10 <-7 > M <-1 > s, high-sensitivity and visual analysis and detection of L-Cys can be realized at normal temperature, the detection interval is 1-40 [mu] mol / L, and the detection limit is 0.361 [mu] mol / L.

The invention relates to a cationized manganese nano adjuvant as well as a preparation method and application thereof. The cationized manganese nano adjuvant comprises manganous-manganic oxide nano particles and cationized template molecules wrapping the surfaces of the manganous-manganic oxide nano particles, the cationization template molecule is a protein subjected to cationization modification treatment, or a protein fragment thereof, or a polypeptide fragment thereof. Precise regulation and control of surface charges and structures of the manganese nanoparticles are realized through a biomineralization technology, and the key problems of a traditional vaccine adjuvant in the aspects of antigen delivery, immune activation and biocompatibility are effectively solved. The cationized manganese nano adjuvant can efficiently adsorb various antigens to form a stable nano vaccine compound, and congenital immunity and adaptive immunity response of an organism can be remarkably activated; lymph nodes can be effectively targeted, the enrichment degree of antigens in the lymph nodes is improved, and the immune effect is further enhanced; meanwhile, the biotoxicity is low, and the stability is excellent.

The application discloses a kind of potassium-doped chain-like trimanganese tetroxide positive electrode materials and its preparation method and application, belong to the field of aqueous zinc-ion battery, preparation method includes: configuration isopropanol and deionized water mixed solution with a portion of.In magnetic stirring, manganese acetate, potassium chloride and nitrilotriacetic acid are dissolved into mixed solution, K-Mn-NTA, i.e.K-Mn-NCs precursor is prepared by hydrothermal method;Afterwards, K-Mn3O4-NCs is prepared by annealing method;Finally, polyaniline is in-situ polymerized on K-Mn3O4-NCs to obtain K-Mn3O4-NCs@PANI;The positive electrode material of the application is applied to zinc-ion battery, can improve the cycle performance and rate capability of zinc-ion battery, improve the conductivity of positive electrode material while inhibiting the dissolution of Mn, improve the electrochemical performance of zinc-ion battery.

The method comprises the following steps: (1) adding a manganese source, a catalyst and an additive, and introducing oxygen-containing gas to carry out a reaction, so as to obtain mixed slurry; (2) carrying out solid-liquid separation to obtain a mother solution and a solid product, and carrying out post-treatment on the solid product to obtain battery-grade manganous-manganic oxide; and (3) adjusting the pH value of the mother liquor to 7-11, carrying out solid-liquid separation to obtain and treat a manganous-manganic oxide product, and recycling the mother liquor as a base solution or process water in the step (1). The method adopts a basic pH regulation-precipitation method to recover manganese and purify the mother liquor, greatly reduces equipment investment and daily operation and maintenance cost, does not need to depend on other processes for absorption, is short in process flow, clear and easy to control control parameters, is easy to implement and popularize on an existing production line, realizes closed-loop circulation of water, and is suitable for industrial production. New water consumption and wastewater discharge are greatly reduced, the green production requirement is met, and the produced product has good morphology and tap density.

The invention belongs to the technical field of battery material preparation, discloses a preparation method of manganous-manganic oxide with controllable tap density, and aims to solve the problem that a manganous-manganic oxide preparation process in the prior art is difficult to effectively control the tap density of a product, and provides a preparation method of manganous-manganic oxide with controllable tap density based on deep research on growth characteristics of manganous-manganic oxide crystal particles. By optimizing process parameters and regulating and controlling behaviors of the particles in different growth stages, accurate prediction and accurate control of the tap density of the product are successfully realized. On the basis, the process conditions are further optimized, the controllability of the tap density of the product is ensured, the high-tap-density manganous-manganic oxide material is successfully prepared, and important guidance and practical reference are provided for controllable synthesis of battery-grade manganous-manganic oxide. In addition, according to the technology, the preparation process is simplified, the operation difficulty and energy consumption are reduced, and the obvious industrial application potential and industrialization value are achieved.

The application discloses a method for preparing spherical battery-grade Mn3O4, and the Mn3O4 is directly obtained through a one-step method. According to the growth characteristics of the Mn3O4 crystal particles, the on-line changes of the parameters of different growth stages of the Mn3O4 crystal are controlled and changed, and then the growth process of the Mn3O4 crystal is regulated, so that the particle size of the product is controlled and the shape of the product is optimized. Finally, the Mn3O4 product with uniform and controllable particle size and good morphology characteristics is obtained. In addition, according to the particle size of the target product, a corresponding scheme can be formulated to obtain the product meeting the requirements, and the fine control of the preparation process of the Mn3O4 is realized. The method has the advantages of short process, simple operation and low energy consumption.

The invention discloses a preparation method and application of a graphene composite lubricant, graphite, a strong oxidizing acid and a strong oxidant are mixed for oxidation reaction, after the reaction is completed, a reducing agent is added to terminate the oxidation reaction, the pH value of the solution is adjusted to be alkaline, then a metal oxide catalyst is added, oxygen-containing gas is blown in at the same time, and a composite material is obtained after the reaction. And cleaning the obtained composite material, and drying at high temperature to obtain the solid powder composite lubricant. The metal oxide catalyst is introduced in the preparation process, so that the reaction efficiency is improved, and the manganous-manganic oxide / graphene composite material with a more stable structure is formed.

The application discloses a preparation method of a lithium iron manganese phosphate positive electrode material, which comprises the following steps: mixing pre-lithiated lithium iron manganese phosphate precursors, lithium carbonate, iron phosphate, trimanganese tetraoxide and phosphoric acid according to a stoichiometric ratio, preparing a slurry, pretreating the slurry under pH 9-10, mixing the slurry with a polyethylene glycol carbon source after sand milling, and sintering the mixture under an inert atmosphere at 720 DEG C for 6-12 hours after spray drying to obtain a carbon-coated lithium iron manganese phosphate positive electrode material with a particle size D50 of 100-200 nm. The method is simple in process, the obtained material is uniform in particle size, excellent in electrochemical performance, and suitable for high-performance lithium ion batteries.

The application discloses a preparation method and application of nanometer manganese iron lithium phosphate, and comprises the following steps: mixing pre-lithiated manganese iron lithium phosphate precursor, lithium carbonate, iron phosphate, trimanganese tetroxide and ammonium phosphate into slurry according to the stoichiometric ratio of LiMn0.7Fe0.3PO4, and pretreating in an alkaline environment with pH being 8.5-9.5; wet ball milling treatment; mixing with modified glucose and then spray drying; sintering at 700-750 DEG C for 8-14 hours in an inert atmosphere to obtain carbon-coated nanometer manganese iron lithium phosphate. The pre-lithiated precursor is prepared through a hydrothermal reaction, and the modified glucose is carboxylated through citric acid. The method realizes uniform carbon coating of nanoscale particles, suppresses manganese dissolution and interface side reactions, improves lithium ion diffusion and electronic conductivity, improves specific capacity, rate performance and cycle stability, and is suitable for anode materials of lithium ion batteries.

The invention relates to the technical field of preparation of manganous-manganic oxide, in particular to a method for preparing manganous-manganic oxide by taking recycled manganese liquid as a raw material, which comprises the following steps: in a reaction kettle, taking the recycled manganese liquid as the raw material, and adopting a manganese salt primary oxidation method to prepare the manganous-manganic oxide, evaluating the possibility of particle agglomeration caused by non-uniform mixing of solutes in the reaction solution; measuring the significance of the particle aggregation phenomenon; adjusting the stirring speed of the reaction solution in the reaction kettle in real time; and after the reaction is finished, obtaining a manganous-manganic oxide suspended precipitate, and then washing, drying and packaging to obtain a manganous-manganic oxide product. The invention aims to accurately measure the significant degree of particle agglomeration when solutes are not uniformly mixed so as to control and adjust the stirring speed in the process of preparing manganous-manganic oxide and improve the preparation quality of a manganous-manganic oxide product.

The invention discloses a method for removing trimethylamine through catalysis of a manganous-manganic oxide catalyst, and belongs to the technical field of atmospheric pollution control in environmental chemical engineering. The preparation method comprises the following steps: dissolving manganese acetate tetrahydrate in a mixed solution of ethylene glycol and water, heating, then adding a Na2CO3 solution in a nitrogen atmosphere, stirring for reaction, and then washing, drying and calcining to obtain a spherical manganous-manganic oxide catalyst; and finally, in a nitrogen atmosphere containing trimethylamine and oxygen, realizing catalytic removal of the trimethylamine by the spherical manganous-manganic oxide catalyst at 50-250 DEG C. By controlling the morphology of the manganous-manganic oxide catalyst, the obtained spherical manganous-manganic oxide catalyst can completely catalyze and decompose trimethylamine at a relatively low temperature (175 DEG C), and the spherical manganous-manganic oxide catalyst does not have an obvious inactivation phenomenon when the degradation reaction of the spherical manganous-manganic oxide catalyst on the trimethylamine is performed for 45 hours. When the trimethylamine is catalytically removed by the manganous-manganic oxide catalyst, the spherical manganous-manganic oxide catalyst has excellent nitrogen and carbon dioxide selectivity.

The invention discloses a manganese-based composite negative electrode material, a negative electrode plate, preparation methods of the manganese-based composite negative electrode material and the negative electrode plate, and a lithium ion battery. The manganese-based composite negative electrode material is a composite material of manganous-manganic oxide and reduced graphene oxide. In the negative electrode material provided by the invention, the graphene matrix provides a conductive three-dimensional network structure for Mn3O4, the Mn3O4 nano octahedron prevents the graphene layer from being stacked again, and in addition, the Mn3O4 nano structure wrapped by graphene can reduce volume expansion in the charging and discharging process, so that the cycle life is prolonged.

The invention relates to the technical field of manganese sulfate for manganous-manganic oxide materials, in particular to a low-cost impurity removal method for a by-product manganese salt, which comprises the following steps: by taking the by-product manganese salt as a manganese source, sequentially adding a coagulation agent, an impurity removal agent and an extraction agent to obtain a manganese sulfate solution, re-preparing the impurity removal agent and the extraction agent from the by-product through a stripping agent, and returning the impurity removal agent and the extraction agent to a process system for cyclic utilization. The by-product manganese salt is used as a manganese source, the raw material price is low, wastewater and waste residues generated in the production period can be returned to the technological process for reuse, the cost is saved, the environmental pollution is small, the obtained product manganese sulfate solution can reach the battery-grade manganese sulfate standard, and the fluorine content of the solution is greatly reduced and is obviously superior to that of an existing process.

The application belongs to the technical field of battery materials, and specifically discloses a preparation method of battery-grade trimanganese tetraoxide. The application first mixes a complexing agent, a pH regulator and an ethanol aqueous solution to obtain a mixed solution; then the mixed solution is mixed with a manganese source to perform a complexing dissolution reaction; after the reaction is completed, oxygen is introduced into the mixed solution to sequentially perform an oxidation reaction, an induced hydrolysis assembly and aging, so as to obtain the battery-grade trimanganese tetraoxide; the complexing agent comprises one or more of glycine, sodium glutamate, ammonium acetate, triammonium citrate and aminotri (methylene) phosphonic acid. The preparation method provided by the application has the advantages of few steps, short path and low energy consumption; and the trimanganese tetraoxide obtained finally has the advantages of stable properties, high quality, high sphericity and high manganese content.

The invention discloses a high-current power type thermosensitive chip and a preparation method thereof. The current bearing capacity of the chip is remarkably improved on the premise that the product size is not increased, and the technical scheme is as follows: the thermosensitive chip is made of a composite material, and the composite material comprises a main material and a composite additive; the main material comprises the following components in percentage by weight: 30 to 70 percent of manganous-manganic oxide (MnO), 10 to 30 percent of zinc oxide (ZnO), 8 to 20 percent of copper oxide (CuO) and 1 to 10 percent of cobaltosic oxide (CoO); the composite additive accounts for 1-10% of the weight of the main material; the invention has the following beneficial effects: a multi-layer annular structure design is adopted to form a collaborative heat dissipation mechanism, which is beneficial to simultaneous dissipation of heat in the up and down directions, and avoids the'hot bottleneck 'effect of heat accumulation in the central area of a solid structure; the technical bottleneck that a traditional power type thermistor depends on increasing the size and improving the current capacity is effectively solved, the outstanding industrial application value is achieved, and meanwhile the thermal stability and durability are improved.

The invention discloses a method for recovering manganese from pyrolusite waste residues. The method is characterized by comprising the following steps: crushing the pyrolusite waste residues, uniformly mixing and grinding, and drying; the method comprises the following steps: uniformly mixing dried pyrolusite waste residues with the ternary flux according to the claim 1, heating to 110 DEG C in a tubular furnace, roasting for 55-65 minutes at a constant temperature, continuously heating to 280 DEG C, continuously roasting for 25-35 minutes, then heating to 500 DEG C, continuously roasting for 55-65 minutes, cooling to room temperature after the reaction is completed, taking out a roasted residue sample, adding deionized water, leaching manganese sulfate at room temperature, filtering and separating, and drying to obtain the pyrolusite waste residues. Manganese sulfate crude liquid and leaching residues are obtained; metal oxides in the pyrolusite waste residues are reduced by the flux and then sulfated, so that the process of extracting manganese from the pyrolusite waste residues to produce high-purity manganous-manganic oxide is accelerated, and meanwhile, the problems of resource waste and environmental pollution caused by the pyrolusite waste residues are solved.

The invention discloses aluminum-doped manganous-manganic oxide, a preparation method of the aluminum-doped manganous-manganic oxide, a positive electrode material and a preparation method of the positive electrode material, and relates to the technical field of lithium ion batteries. The chemical general formula of the aluminum-doped manganous-manganic oxide disclosed by the invention is (MnxAl1-x) 3O4, wherein x is more than or equal to 0.94 and less than or equal to 0.97 And the size of a c-axis unit cell of the aluminum-doped manganous-manganic oxide is 9.36 to 9.40. Lithium manganate prepared from the aluminum-doped manganous-manganic oxide is good in high-temperature performance and wide in application range.

This invention discloses a method for recovering manganese from manganese metallurgical slag through low-temperature roasting and water leaching. The manganese metallurgical slag is dehydrated by pressure filtration, dried, and then mixed uniformly with a flux. Under inert gas protection, the mixture is heated to 180°C in a tubular furnace and roasted at a constant temperature. The temperature is then increased to 280°C and roasted further, followed by a further increase to 620°C and roasting. After roasting, the mixture is naturally cooled to room temperature. A roasted slag sample is taken out, and deionized water is added to leach manganese sulfate at room temperature. The mixture is filtered to separate the manganese sulfate, yielding a crude manganese sulfate solution and a leaching residue. The crude manganese sulfate solution undergoes multi-stage impurity removal, and ammonium bicarbonate is added to convert the manganese sulfate into manganese carbonate. After washing, filtration, and calcination, solid manganese tetroxide is obtained. This method utilizes a pyrometallurgical flux under inert gas protection to efficiently sulfatate the metal in the manganese metallurgical slag, whereby manganese forms soluble MnSO4. This enables the water leaching extraction of MnSO4 from the roasted slag. After graded impurity removal, high-purity manganese tetroxide is prepared, solving the resource waste and environmental pollution problems caused by manganese metallurgical slag.

The application belongs to the technical field of lithium ion batteries, and provides a preparation method of a trimanganese tetraoxide and nitrogen-doped honeycomb carbon composite negative electrode material; polyacrylamide, urea and sodium chloride are dissolved in deionized water, and manganese acetate tetrahydrate is added under stirring; the obtained solution is cooled in a refrigerator and freeze-dried, and the dried precursor is calcined in an argon atmosphere; the obtained product is washed with deionized water and suction-filtered, and the washed sample is dried in an oven to obtain the trimanganese tetraoxide and nitrogen-doped honeycomb carbon composite negative electrode material. The trimanganese tetraoxide and nitrogen-doped honeycomb carbon composite material prepared by the preparation method has excellent cycle stability and rate performance as a lithium ion battery negative electrode material, the synthesis method is simple and controllable, the cost is low, and the material is expected to become a scaled conversion-type negative electrode material.

The invention relates to a degradable manganous-manganic oxide-tannic acid-polymer composite modified artificial dura mater and preparation thereof, and belongs to the technical field of biological materials. According to the modified artificial dura mater, a spongy collagen biological membrane scaffold beneficial to cell growth and new dura mater tissue generation is provided for a dura mater defect part, and the modified artificial dura mater with good tissue compatibility and degradability is prepared by introducing carboxymethyl chitosan and manganous-manganic oxide / tannic acid. The novel composite artificial dura mater can effectively reduce intracranial infection and leakage of cerebrospinal fluid. The modified artificial dura mater loaded with the antioxidant manganous-manganic oxide / tannic acid nano-composite can effectively remove free radicals in the brain, and the composite modified artificial dura mater has anti-inflammatory and antibacterial functions and can be adhered to the surface of the dura mater after absorbing tissue exudate, water, buffer solution and the like. And can be tightly attached to the dura mater without suturing, and can exert antibacterial and anti-inflammatory activity for a long time.

This invention belongs to the field of battery cathode material technology, specifically relating to a core-shell structured manganese tetroxide, its preparation method, and its application. The preparation method of the core-shell structured manganese tetroxide of this invention includes the following steps: (1) adding PEG, ZIF-8, and Zn to a container containing a manganese sulfate solution. 2+ (1) Ammonia solution is introduced into the container and heated to react; (2) After the reaction is completed, the solid and liquid are separated, and the obtained solid is washed and dried to obtain an intermediate product; (3) The intermediate product is calcined to obtain the core-shell structured manganese tetroxide. The core-shell structured manganese tetroxide of the present invention helps to solve the problems of rapid cycle decay, poor rate performance or insufficient compaction density in the sintering preparation process of lithium manganese oxide using manganese tetroxide in the prior art.

The invention discloses a comprehensive recycling process of manganese resources, and relates to the technical field of industrial solid waste recycling, and the process comprises the following steps: regulating the particle size of electrolytic manganese residues by using a wet ultrafine crushing technology, and controlling the solid content of generated homogenized slurry; sulfur dioxide and the homogenized slurry are mixed and then injected into a multi-stage countercurrent absorber for a reaction, and a leaching solution is obtained; separating the leachate into a first filtrate and a manganese slag filter cake; separating the first filtrate into a manganese residue filter cake and a third filtrate; mixing the manganese slag filter cake to obtain purified slag; converting the purified slag into a recyclable raw material and a second filtrate used for a washing medium by using a refined manganese slag harmless treatment system; and converting the third filtrate into electronic-grade manganous-manganic oxide and ammonium sulfate products by using an ammonia element and a precipitator on the basis of a comprehensive resource recovery technology. According to the invention, a reduction activation-multiphase separation-cascade purification three-in-one cooperative treatment system is constructed.

A kind of high-current power type thermosensitive chip and its preparation method;Effectively solve the premise of not increasing product volume, significantly improve the current carrying capacity of chip, its technical scheme is as follows:The thermosensitive chip uses composite material, the composite material includes main material and composite additive;The weight percentage of each component in the main material is as follows:Manganese tetroxide Mn₃O₄: 30-70%, zinc oxide ZnO: 10-30%, copper oxide CuO: 8-20%, cobalt tetroxide Co₃O₄: 1-10%;The composite additive accounts for 1-10% of the weight of main material;The beneficial effects of the present application are as follows:Multi-layer ring structure design is adopted, a synergistic heat dissipation mechanism is formed, which is beneficial to heat dissipation in the upward and downward directions simultaneously, avoiding the "thermal bottleneck" effect of heat accumulation in the center area of solid structure;Effectively solve the technical bottleneck of traditional power type thermistor relying on increasing volume to improve current capacity, have outstanding industrial application value, improve thermal stability and durability at the same time.

The utility model relates to lithium ion battery technical field discloses a high solid content type lithium manganate production manganese dioxide chlorine element removal device, including mounting bracket and rotating plate rotation connection in the left and right sides of the inner wall of mounting bracket, still include: fixed in the left side of mounting bracket motor, and the output shaft of motor penetrates mounting bracket and is fixedly connected between the left rotating plate, the utility model has multiple dehydration function, this device can first to the wet manganese dioxide filter cake extrusion dehydration, can remove the large amount of free water in filter cake in advance, greatly reduce the water content required to remove subsequent drying, then continue to the wet manganese dioxide filter cake and rotate drying treatment, make the wet manganese dioxide filter cake and hot air can fully contact, accelerate the moisture evaporation rate, further improve the drying efficiency, effectively avoid the manganese dioxide oxidation problem caused by local temperature too high, guarantee the chemical property stability of manganese dioxide, ensure that the product quality is not influenced.

This invention relates to the technical field of barium hydroxide preparation, specifically to a method for producing barium hydroxide monohydrate. The method includes: pulverizing barite raw material; mixing the pulverized barite with rice husk ash and soda ash; calcining at 1100-1200℃ and holding at that temperature for 90-120 minutes; then cooling the mixture in a kiln to below 80℃ to obtain porous crude barium oxide; dispersing the crude barium oxide in water; filtering and washing the residue with deionized water to obtain the filtrate; heating the filtrate to 80-85℃; slowly adding a mixed desulfurizing agent composed of zinc oxide, calcium oxide, and manganese tetroxide for desulfurization; filtering and washing to obtain a barium hydroxide solution; concentrating and crystallizing to obtain Ba(OH)₂·8H₂O crystals; and then drying and dehydrating under vacuum to obtain barium hydroxide monohydrate. The purpose of this invention is to provide a method for producing barium hydroxide monohydrate that achieves low-cost, simple, stable product quality, and environmentally friendly production.