55 results about "Manganese" patented technology

The invention discloses a method for preparing a nickel-cobalt-manganese ternary material precursor. By virtue of the method, waste small-particle-size nickel-cobalt-manganese ternary material precursors in a product are separated out and recycled into a reaction kettle, so that the ternary material precursors with the particle size of 7-15 micro meters account for over 95% in the product.

The invention relates to a low-density high-intensity ceramsite fracturing propping agent and a preparation method thereof. The low-density high-intensity ceramsite fracturing propping agent has a core material body which is composed of the following materials in percentage by weight: 30-40% of bauxite, 10-15% of talcum, 10-12 % of mullite, 12-15% of metakaolin, 6-15% of potassium feldspar, 3-6.5% of titanium dioxide, 1-3% of manganese powder, 3-4.5% of nano calcium carbonate, 2.5-3.5% of iron trioxide and 2.5-3.5% of magnesium orthosilicate; a gel breaker layer is arranged outside the core material body, and the gel breaker layer is sequentially coated with an external coating and a lubricant layer. When in preparation, various materials are firstly ball-milled, sieved and graded, and then matched in different ways; the potassium feldspar and the titanium dioxide both can reduce reaction temperature to a certain extent; the added manganese powder mainly plays a role in catalyzing; the nano calcium carbonate plays a role in reducing density of product; sintering temperature needed by the product is 1250 DEG C; the product is low in density, strong in anti-fracture capacity and high in sphericity; and meanwhile, the production technology is simple and easy to popularize and implement.

The invention relates to the field of lithium carbonate preparation, in particular to a method for extracting lithium from brine to prepare battery-grade lithium carbonate by an ion exchange method. The method includes the steps of 1), removing magnesium by a coprecipitation method; 2), adsorbing to extract the lithium by a manganese adsorbent; 3), preparing the battery-grade lithium carbonate, namely adding alkaline liquor into a desorption solution in the step 2), regulating a pH value to 7-12, producing manganese hydroxide precipitate, filtering the manganese hydroxide precipitate, concentrating filtrate until the lithium content reaches 20-30 g/L, filtering to remove sodium chloride, adding a saturated sodium carbonate solution to react, filtering, and subjecting filter cakes to water scrubbing so as to obtain the battery-grade lithium carbonate. The method has the advantages that hydrotalcite is obtained after magnesium removal, so that the problem of recycling the magnesium in the brine is solved; the content of various impurity ions in the desorption solution can be controlled effectively by removing the magnesium and extracting the lithium by adsorption sequentially, and then the battery-grade lithium carbonate is prepared.

An iron removing flux for Mg alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride and Ti (or Mn) compound. Its advantages are high effect on removing iron and other impurities from Mg alloy, high activity and low cost.

The invention discloses a modified lithium-rich manganese-based cathode material for a lithium ion battery. The structural general formula of the material is (La<1-x>Sr<x>)MnO<3-delta>, wherein x is equal to or greater than 0 and less than or equal to 0.3, a is equal to or greater than 0.8 and less than or equal to 1, and delta is equal to or greater than 0 and less than or equal to 0.75; the modified lithium-rich manganese-based cathode material is prepared through the method 1 or method 2 as follows: method 1: lanthanum salt, strontium salt and manganese salt are mixed according to the stoichiometric proportion to prepare a (La<1-x>Sr<x>)MnO<3-delta> precursor solution, then a complexing agent is added into the solution and stirred uniformly, the lithium-rich manganese-based cathode material is added into the solution, heating is performed to evaporate the solution to form gel, and finally the dried gel is calcined, so that the modified cathode material is obtained; method 2: a precursor solution is prepared according to the method 1, a complexing agent is added into the solution and stirred uniformly, then the mixed solution is heated until the solution is burnt into powder, the powder is pre-burnt and is mechanically mixed with the lithium-rich manganese-based cathode material, and the mixture is calcined, so that the modified cathode material is obtained.

The invention provides a slow-release compound fertilizer, which is a spherical or near-spherical granular compound fertilizer having a layered structure, wherein the innermost layer is a nitrogenous fertilizer layer; the intermediate layer is a potassic fertilizer layer; the outer layer is a mineral layer containing phosphorus; proportions of nitrogen, phosphorus and potassium are determined according to thicknesses of the fertilizer layers. The invention further provides a production method of the slow-release compound fertilizer. Tailing pulp is generated after heavy metals, manganese and iron are recycled from leached residues of production enterprises for electrolyzing manganese metal and manganese dioxide. The production method comprises the following steps of: adding flocculating agent, the weight of which is 0.01-0.02% of that of tailing mud, into the obtained tailing pulp, carrying out filter pressing by using a belt filter press, wherein the moisture content of filtered mud is 40-50%; and then, adding phosphatic fertilizer into the filtered mud, uniformly mixing, and carrying out calendering forming three times and roller-crushing calendaring granulating once by adopting a fertilizer granulator and drying to obtain the slow-release compound fertilizer.

The invention discloses a lithium air battery catalyst based on metal organic frameworks (MOFs), and a method for preparing the lithium air battery catalyst. The catalyst consists of a transition metal complex and MOFs carriers, wherein the transition metal complex is obtained by reacting cobalt salt or manganese salt with a nitrogen-containing ligand. After being applied to a lithium air battery, the catalyst is high in catalytic activity and high in stability. By using the low-cost nitrogen-containing ligand as a raw material, the catalyst has the advantages of simple preparation process, low preparation cost and the like.

The invention discloses a preparation method of a MnZn (Manganese-Zinc) soft magnetic ferrite material containing modified nanoscale titanium dioxide. The preparation method comprises the following steps of: preparing main materials, preparing auxiliary materials, pre-burning, mixing and secondarily ball-milling the main materials and the auxiliary materials, shaping and sintering to obtain a MnZn soft magnetic ferrite magnetic core of modified nanoscale titanium dioxide. Through the addition of the modified nanoscale titanium dioxide, the MnZn soft magnetic ferrite material can play a bridge combination role among different raw materials; the used raw materials have the advantages of better distribution, high density, high grain boundary resistivity, low porosity and great and even grains; the prescription of the raw materials is reasonably improved, so that the magnetic core has higher magnetic conductivity after firing; and the indexes such as power loss, frequency feature, curie temperature, saturation flux density and the like are greatly improved.

The invention relates to a humic acid-containing complete-element water soluble fertilizer. The fertilizer contains potassium humate, potassium fulvate, mannitol, potassium nitrate, potassium dihydrogen phosphate, ammonium biphosphate, urea, N-butyl thiophosphoric triamide, magnesium sulfate monohydrate, boric acid, EDTA chelated manganese, EDTA chelated iron, EDTA chelated copper, EDTA chelated zinc and sodium molybdate. The fertilizer provided by the invention has the advantages of complete nutrition, reasonable proportioning and synergism of all components, good crop growth promotion effect, and good water solubility, can be applied to crops while the crops are irrigated, especially has good effects on economic crops and field crops in dry lands, and is in favor of realizing water saving irrigation.

The invention provides a system for continuously recycling a waste ternary lithium-ion battery and belongs to the technical field of recycling of lithium-ion batteries. The system comprises a pre-treatment unit, an acid leaching unit, a primary impurity removal unit, a co-precipitation unit, a secondary impurity removal unit and an ammonia recycling unit, wherein the pre-treatment unit comprises apulverizer, a pulse dust collection device, a positive and negative electrode powder cabin and a separation machine; the acid leaching unit comprises a leaching reaction kettle and a micro-filteringmachine I; the primary impurity removal unit comprises an impurity removal reaction kettle and a squeezing machine; the co-precipitation unit comprises a material preparation kettle, a co-precipitation reaction tank and a centrifugal machine; the secondary impurity removal unit comprises a secondary impurity removal reaction kettle and a micro-filtering machine II; the ammonia recycling unit comprises a heater, an evaporation crystallization device, a condenser and an ammonia liquid receiving tank. The invention further provides a technology for continuously recycling the waste ternary lithium-ion battery by utilizing the system. According to the system provided by the invention, a prepared nickel-cobalt-manganese ternary material precursor has high purity and large tap density; grains have a small grain diameter and narrow distribution and are uniformly mixed; a lithium sulfate solution can be directly used for producing lithium carbonate.

The invention provides a preparation method for MnO2@SiO2 nano composite particles with core-shell structures. The method comprises the steps of A) mixing potassium permanganate and a silica precursorto obtain a mixed solution; B) irradiating the mixed solution with a cobalt 60 source under a stirring condition to initiate reactions to obtain a mixed solution after irradiation; C) centrifuging the irradiated mixed solution, and separating to obtain the MnO2@SiO2 nano composite particles with the core-shell structures. The method directly irradiates the potassium permanganate solution containing the silica precursor by 60Co gamma-ray, and obtains the MnO2@SiO2 composite nano particles with particle diameters of 100 nanometre or less which take MnO2 as cores and SiO2 as shells by a one-stepmethod. The method has the advantages of simple formula, convenient operation, economic performance, energy saving, green and environmental protection.

The invention provides the high-strength 23Mn2CrNiMnVERA steel for railway train connection and a preparation method thereof. The 23Mn2CrNiMnVERA steel comprises the following components of carbon, silicon, manganese, vanadium, aluminum, chromium, molybdenum, nickel, cerium, copper, phosphorus, sulfur, Fe and non-removable impurities; the preparation method comprises the steps of molten iron pretreatment, converter smelting, LF refining, VD vacuum refining and continuous casting tapping. The high-strength 23Mn2CrNiMoVREA steel for connection has the advantages of being easy to weld, high in tensile property and high in yield strength at low temperature (-60 DEG C); and the preparation method of the high-strength 23Mn2CrNiMnVERA steel for the railway train connection has the advantages of being easy to control in the process and suitable for popularization.

The invention relates to a welding wire for steel-copper dissimilar metal submerged-arc welding and a welding method of the welding wirearc, belonging to the field of submerged-arc welding. The welding wire comprises the following chemical components in percentage by weight: 0.05-0.15% of arcbon, 0.80-2.10% of manganese, 0.07-0.95% of silicon, 0-0.03% of sulphur, 0-0.03% of phosphorus, 0.20-0.35% of copper, 0-0.20% of chromium, 0-0.30% of nickel and the balance of iron; the welding method comprises the following steps that: before being welded, a copper plate and a steel plate are not preheated; the steel plate and the copper plate are fixed by using gas shield welding spot welding; steel-copper dissimilar metal submerged-arc welding wires are used for matching with SJ101 welding flux so as to carry out submerged-arc welding; when being welded, the welding wire deviates 4mm-8mm from the side of the copper plate; the welding current is 396-630A; the welding voltage is 35-40V; and the welding speed is 23-30m/h. The welding joint obtained by the welding method provided by the invention has the characteristics of good mechanical performance, high efficiency, beautiful appearance and little crack, etc.

The invention discloses anti-corrosion and anti-wear high manganese steel and a preparation method thereof. The high manganese steel consists of the following components in percentage by weight: 1.0-1.2% of carbon, 14-15% of manganese, 0.48-0.6% of silicon, 10.5-12.5% of chromium, 0.5-0.6% of molybdenum, 0.3-0.5% of nickel, 0.1-0.3% of aluminum, 0.08-0.12% of copper, 0.01-0.02% of nitrogen, 0.01-0.03% of rare earth element, less than or equal to 0.03% of phosphorus, less than or equal to 0.03% of sulfur and the balance of iron. The preparation method comprises: (1) smelting: adding alloy and metal raw materials including technically pure iron, nitrided ferrovanadium, ferromanganese, technically pure aluminum and the like into an electric furnace, heating to melt all the alloy and metal raw materials, maintaining for 30 minutes at the temperature of 1,730-1,750DEG C, and discharging at the temperature of 1,460-1,500 DEG C; (2) casting; (3) heat treatment after casting; and (4) product acceptance. The anti-corrosion and anti-wear high manganese steel has the advantages of good anti-corrosion property, good anti-wear property, good impact toughness, long service life and short production period.

The invention relates to the field of automobile making, in particular to a novel thermoforming reinforcer and a processing method thereof. The novel thermoforming reinforce comprises the following components in parts by weight: 20-30 parts of iron, 3-5 parts of nano silicon carbide particles, 3-5 parts of tungsten, 1-2 parts of manganese, 2-6 parts of molybdenum, 3-5 parts of cobalt, 2-3.5 partsof nickel, 1-2 parts of chromium, 3-5 parts of vanadium and 2-4 parts of titanium. A manufacturing method for the reinforcer comprises the following steps of: (1) uniformly mixing the components; (2)adding mixed raw materials into a heating furnace to refine; (3) forging and pressing; (4) quenching; (5) tempering; and (6) stamping and manufacturing. A stamping part material manufactured by the manufacturing method has excellent hardness, excellent yield strength and excellent tensile strength.

The invention discloses a low-aluminum and low-silicon welding wire steel low-sulfur-control smelting method. After an electric furnace steelmaking is completed, alloying is carried out, the tapping quantity is controlled during the electric furnace tapping, and the electric furnace retains steel; stirring is carried out after tapping, and slags are poured out after stirring; the slags are placedin a refining furnace, after active lime and fluorite are added in batches, power supply slugging refining is carried out, after refining is carried out, active lime and fluorite are re-added, a deoxidizing slag-forming agent is added for diffusion deoxidation, metal manganese is added for supplementary for adjusting manganese content after sampling and analysis are carried out, after the power supply heating is carried out, the deoxidizing slag-forming agent is used to continue to diffuse and deoxidize to maintain white slag, when the temperature reaches 1615-1630 DEG C, sampling and analysisare carried out, when the mass percentage content of aluminum is small than or equal to 0.010%, the mass percentage content of silicon is small than or equal to 0.05, the mass percentage content of sulfur is small than or equal to 0.003%, and the manganese content is qualified, pure calcium rod cored wires are fed, and after the calcium is fed, static stirring is carried out for more than or equal to 15min; and after the temperature reaches 1595-1610 DEG C, continuous pouring is carried out, and thus low-aluminum and low-silicon welding wire steel is obtained.

The invention discloses a planting method for beet rich in various trace elements. The method comprises the steps of deep tillage and land preparation, film coverage and pipe pavement, seedling transplanting, water and fertilizer management and timely harvesting, wherein a base fertilizer rich in various trace elements and other effective components and a powder fertilizer are applied, and a reasonable application method is combined, so that the absorption of water and nutrients by beet roots is promoted, the fertilizer utilization rate is effectively improved, the content of boron, manganese,copper, iron, zinc, selenium, iodine and silicon in plant cells is increased, and the nutrition quality is improved.

The invention belongs to the technical field of agriculture plantation, and especially relates to a high-efficiency environment-friendly composite fertilizer specially used for lotus drought plantation. The high-efficiency environment-friendly composite fertilizer specially used for lotus drought plantation is prepared via combination and synergistic effect of livestock and poultry excrement, composite urea, calcium magnesium phosphate fertilizer, biological humic acid, fulvic acid, Chinese herbal medicine slag, tea slag, amino acid, boron mud, EDTA chelated iron, EDTA chelated manganese, a fertilizer effect synergist, and a natural insecticide. The high-efficiency environment-friendly composite fertilizer is capable of providing needed nitrogen, phosphorus, potassium, calcium, iron, and manganese continuously based on growth process of lotus in drought plantation; the composite urea is capable of releasing nitrogen slowly and continuously based on growth characteristics and fertilizer requirement laws of lotus drought plantation; active carbon is capable of purifying water in lotus drought plantation, absorbing heavy metal ions, and improving soil in lotus drought plantation; environment pollution is not caused; the high-efficiency environment-friendly composite fertilizer is friendly to the environment; fertilizer efficiency is high, and lasts long; adding of Chinese herbal medicine slag and tea slag is capable of increasing fiber content; combination of boron mud and livestock and poultry excrement is capable of realizing organic matter decomposition and release of trace elements in soil under the action of composite zymophyte; and soil growth environment is improved.

The invention discloses a cold-rolling high-strength hot-galvanized steel plate and a preparation method. The steel plate comprises the following chemical components according to a weight percentage:0.12-0.16% of C, 0.60-0.90% of Mn, less than or equal to 0.05% of Si, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.02-0.05% of Als, and the balance of Fe and other unavoidableimpurities. The advantage is that the steel plate adopts a low-carbon low-manganese composition design, and yield strength of the steel plate after annealing and hot-galvanizing reaches 500-650 MPa.

A titanium type gas-shielded flux-cored wire comprises a welding wire flux core. The mass of the welding wire flux core is 10%-20% the total mass of the flux-cored wire. The welding wire flux core comprises, by weight, TiO2 of 35%-50%, SiO2 of 3%-10%, Al2O3 of the proportion larger than 0 and smaller than 1%, ZrO2 of the proportion larger than 0 and smaller than or equal to 1% and the balance of alloyed powder. The alloyed powder comprises the following constituents: manganese metal, ferrosilicon, ferrotitanium, magnesium powder and the balance of iron powder, wherein the weight percentages of the manganese metal, the ferrosilicon, the ferrotitanium and the magnesium powder in the welding wire flux core are 10%-20%, 1%-5%, 0.5%-2.5% and 4%-7% respectively. The content of the oxides of Al2O3 and ZrO2 which respectively have a higher melting point than TiO2 is reduced as much as possible so as to reduce the content of the impurity of nonmetal oxide in deposited metal, and therefore the effect of improving crack resistance and mechanical properties can be achieved. The titanium type gas-shielded flux-cored wire is mainly suitable for low-carbon steel welding with high requirements for crack resistance.

The invention discloses a mine acidic iron-containing wastewater treatment method and system. Limestone macadam with a low price is used for pre-adjusting a pH value, then the pH value is adjusted tobe more than 6 through a coal ash filter material, the oxygen content in the wastewater is increased through a multi-stage ecological drop channel, and then a catalytic oxidation reaction is carried out through manganese sand contact to remove iron in the water. An interval is formed between a regulating filter tank and a contact filter tank, and an S-shaped circuitous water flow direction is formed in the regulating filter tank and the contact filter tank, so that wastewater is in full contact with fly ash and manganese sand filter materials, and neutralization reaction and catalytic oxidation reaction effects are further improved. The consumption of electric power and external consumables is extremely low, the daily operation is unattended, only sludge in the sedimentation tank needs tobe periodically cleaned, and the mine acidic iron-containing wastewater treatment method and system are particularly suitable for unattended field environments with inconvenient traffic. Compared withthe existing sewage treatment facilities, the overall investment and the later operation and maintenance cost can be greatly reduced, and good popularization values are achieved on the standard discharge of the coal mine well wastewater and the environmental protection.

The invention relates to a low-cost and high-quality formula of smelting Q345B steel and a preparation method of the formula. Raw materials comprise iron ores, silicon-manganese alloys Si15Mn65, ferrotitanium alloys 50TiFe and aluminum alloys Al99. 6.6kg-9.6kg of silicon-manganese alloys Si15Mn65 are added into each ton of Q345B steel, 0.6kg-0.9kg of ferrotitanium alloys 50TiFe are added into each ton of Q345B steel, and 1.69kg of aluminum alloys Al99 are added into each ton of Q345B steel. The titanium alloys and the aluminum alloys are used for replacing parts of Mn reinforced crystal grains to improve strength, segregation caused by high Mn steel is decreased, smelting cost is reduced, cast billet quality is ensured, and the quality and the yield of the Q345B steel are greatly improved.